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CATIA V5 Mechanical Design Expert

CATIA CATI A V5 Mechanic Mechanic al Desi Design gn Exp ert STUDENT GUIDE

CATIA CAT IA V5 Mechanic Mechanical al Desi Design gn Expert Student Handbook Version 5 Release 19

40 Hour Hour s

Copyright DASSAULT SYSTEMES

3


Copyri Copy righ ghtt DASSAULT SYST SYSTEM EMES ES AL L RIGHTS RESERVED No part of this publication may be reproduced, translated, stored in retrieval system or transmitted, in any form or by any means, including electronic, mechanical, photocopying, recording or otherwise, without the express prior written permission of DASSAULT SYSTEMES. This courseware may only be used with explicit DASSAULT SYSTEMES agreement.


4


Table of Contents Cont ents In t r o d u c t i o n

7

Des i g n Co m p l ex Par t s

21

Su r f ac e Des i g n

69

Ana A nall yze an d A n no t ate Part s

103

Sh ar i n g In f o r m at i o n

113

Ass A ss em embl bl y Des i g n

137

Co n t ex t u al Des i g n

177

Co m p l ex A s s em b l y Des i g n

199

Mas t er Pr o j ec t

245

Sh o r t c u t s

282

Gl o s s ar y

283


5


Introduction

1

Learnin Lea rnin g Objectives Upon completion of this lesson yo u will be able able to:    

Understand the importance of Parent/Child relationships. Review the model creation steps. Modify the design using the Define in Work Object command. Organize the features of the model into various bodies and geometrical sets.

4 Hours


7


Case Ca se Study Stu dy The case study for this lesson is the Hinge.

Design Intent 

The Hinge is a molded part that is used in an assembly.



The part is symmetrical.



The holes are centered on the bearings.

Stages Sta ges in th the e Proc Process ess 1. Revie Review w the User Interfa Interface. ce. 2. Understanding importance of Parent/Child Relationships.

XY plane

3. Org Organi anizin zing g a Model. Model.

X-section Xsection of handle block


8


Revi Re view ew the User Int Interface erface CATIA is mechanical design software. It is a feature-based, parametric solid modeling design tool that takes advantage of the easy-to-learn Windows graphical user interface. You can create fully associative 3D solid models with or without constraints while utilizing automatic or user-defined relations to capture design intent. 

The Part Design workbench lets you build solid 3D geometry. From the Part Design workbench you can access the Sketcher workbench and create 2D profiles that will become 3D model.



The Assembly Design workbench allows you to bring components together to create the final product. You can design parts in the assembly context and use methods of designing assemblies that will aid in concurrent engineering, such as Skeleton models and publishing elements.



The Generative Shape Design workbench lets you create surface and wireframe geometry. The surface and wireframe geometry allows you to create more complex solid models and gives more control over the shape of a model.


9


Importance Import ance of Pare arent/Child nt/Child Rela elatio tionsh nships ips (1 (1/2 /2)) Design intent is a plan to construct solid model of a part, in order to convey its visual and functional aspects. The way a solid model is built can affect many aspects, including its flexibility to changes, its stability during the change process, and the resource requirements to compute a new result. Therefore, it is important to take the design intent into account to achieve an efficient solid model of the part.

Top Reference Plane 1

2 Botto m Reference Plane Plane

3

The dependency between one feature and the other is known as a parent/child relationship. Parent/Child Relationships are important in maintaining the design intent of the part. You should carefully consider choosing the best base feature, which parent/child relationships should exist, and what dimensions and feature order best reflect the planned design intent.


4

10


Importa Import ance of o f Pa Parent/C rent/Chil hild d Rela elatio tio nsh nships ips (2 (2/2 /2)) Many design practices are derived from company standards and need to be considered before modeling. Some common design practices are:  Always

choose the most stable feature in the model as the base feature.



Try to avoid creating references to dress-up features such as fillets and chamfers. These features may be removed in downstream applications.



Choose the best depth option for the application. For example, decide if a pocket is required to cut through the entire model. Creating the pocket with a dimensional depth is not recommended, because the depth of the feature it is cutting through may change; instead, create the pocket with an Up to Last depth.


The upper Pad Sketch Sketch i s created on reference Plane and independent independent o n the Base Pad.

The Pocket Sketch is created on r eference Plane Plane and independent on the Upper Pad.

On deletion of the Upper Pad, the pocket is not affected.

11


Main Ma in Tool Tools s / Menu Menus s (1/2) (1/2) Investigating the Model 1

Scan or Define In Work Work Object: Helps you review how the model was created, feature by by feature.

2

Parent/Children: Displays the parent and children of the selected feature and hence helps to display the relationships that exist in the model. Defin De fin e in Work Work Obj ect: ect: Activates Activates the current selected feature disabling all child features. You can use Define in Work Object to review the feature, edit it or modify the design.

3

1

2

3


12


Main Ma in Tool s / Menu Menus s (2/2) (2/2) Organizing a Solid Model 1

Body : Inserts a new body feature in the part.

2

Geometri cal Set: Inserts a new Geometrical Geometri Set in the part.

1 2

3

Ordered Geometrical Set: Inserts a new Ordered Geometrical Set in the part.

3

Tools > Options Setting 4

Hybrid Design Design Option: You can chose to embed hybrid design in your part by activating the Ena Enable ble hybrid d esign insid e part part bod ies and bodies option by accessing Tools > Options > Infrastructu re > Part Part Infrastruc ture > Part Part Docu ment ment..


4

13


Case Stu tudy: dy: Introduc Intro ductio tion n Recap Exercise 40 min

In this exercise you will crea create te a model. The skil ls needed to create this mod el were covered covered in the Fundamentals Fundamentals co urse. There There are are no detailed inst ruct ions for this exe exercis rcis e. Instea Instead d a detailed drawing has been been pro vided f or yo ur r efe eference. rence.


14


Case Stud Stud y: Hing inge e Before you begin to design the model you must analyze what is the best base feature? Which features will make good parent features? features? Which features will not make good parent features? What is the best orientation of the model? Which reference plane will you choose as the sketch support for the base feature? How will you constraint the base feature? Consider the following: • The Hing Hinge e is a molde molded d part part that that is used used in an an assemb assembly. ly. • Th The e par partt is is sym symme metr tric ical al.. • The hol holes es are are cent centere ered d on the bea bearin rings. gs.

Holes

Bearings

Bearing

Hole


15


Do It Yours elf: Hinge (1/3 (1/3))


16


Do It Yours elf: Hinge (2/3 (2/3)) The following is a suggested method to design the Hinge: 1.

Crea Cr eate te th the e ba base se fe feat atur ure. e.

2.

Create th the po pocket.

3.

Crea Cr eate te a sec secon ond d pad pad fe feat atur ure. e.

4.

Crea Cr eate te a use userr pat patte tern rn..

5.

Apply fifillets.

6.

Apply drafts.

2

1

3

4

6 5


17


Do It Yours elf: Hinge (3/3 (3/3)) The following is a suggested method to design the Hinge (continued): 7.

Crea Cr eate te se seco cond nd se sett of of fil fille lets ts

8.

Mirror the model.

9.

Create hole.

7 8

10.. Cr 10 Crea eate te a us user er pat patte tern rn.. 9

10


18


Case Ca se Study: Stud y: Hinge Recap Recap 

Determin De termin e the best b ase featur featur e.



Determine De termine the b est orientation.



Determine which pare Determine parent/child nt/child relationships should be created created and which sho uld be avoided.



Determin e the best Determin best w ay to org anize the model.


19


Desi sign gn Com ompl ple ex Part Parts s

2

Learnin Lea rnin g Objectives Upon completion of this lesson yo u will be able able to 

Create Advanced Sketch-Based Features. Multi Section solids.  Create advanced Drafts.  Advanced Dress-Up features.  Use the Multi-Body Method.  Create Multi-Model Links. 

8 Hours


21


Case Ca se Study Stu dy The case study for this lesson is the Bottom Cover of a CD jewel case.

Desig De sign n Intent 

Base feature must include overall dimensions supplied. Two sketches outlining the overall shape of the model are supplied to create a solid combine.



Create each support as a single feature.



Create a cut to simulate the logo using a removed multi-sections solid.



By linking to disk holder and flex opening models, any changes that occur in the original source files will update in this file.



Linked features must be kept in separate bodies.



Do not display indented logo when it goes for manufacturing.

Stages Sta ges in th the e Proc Process ess 1. Creat Create e advanced sketched-b sketched-based ased features. features. 2. Create dressdress-up up features features.. 3. Use the the Multi-Bod Multi-Body y method. method. 4. Create Multi Multi-Model -Model links links..


22


Create Crea te Advanced Ad vanced Sketch-Based Sketc h-Based Featur Features es Rib

Ribs and slots are created by sweeping a profile along a center curve.

Slot

A Solid Combine feature is created by the intersection of two components. These can be: 

Sketches



Surfaces



Sub-elements of sketches



3D Planar curves

Solid Combine

Profile 1 Profile 2

Create Crea te Advanced Ad vanced Dress Up Featur Features es The advanced dress up features are:

1

1. Thickn Thickness: ess: Adds an over over thickness thickness to a face; used before machining the part. 2. Remove Faces: Faces: Used to simplify simplify the geometry geometry for downstream applications e.g. machining.

2

3. Replac Replace e Faces: Used to replace replace the planar planar solid surface with the surface. 3


23


Create Advanced Draft Advanced Drafts can be used to create basic line and reflect line drafts as well as drafts with two different angle values for complex parts.

1

2

3

4 3

Different types of advanced Drafts are possible: 1. A Standard Standard draft draft with one side side draft draft 2. A Standard Standard draft with two two sides draft draft 3. A draft using a reflec reflectt line 4. A draft using using two reflect reflect lines lines

While creating advanced drafts, the parting element can be selected. A Parting line represents the location where two halves of the mold meet.

Parting Element

A Parting element can be a line, surface or a face. Draft using a Parting Parting element


24


Create Crea te Mul Multi ti-S -Secti ection ons s Soli ds (1/2) (1/2) Profile 2: Hexagon

A Multi-Sections solid can be positive (i.e., add material) or negative (i.e., subtract material). It is generated by two or more planar profiles swept along a spine. Various types of Multi-Sections Solid are: Profile 1: Rectangle

1. Simple Simple Multi-Sections Multi-Sections Solid: Solid: The selection order of the sections controls the shape of the result.

Guide 1

2. Multi-Sect Multi-Sections ions Solid using using Guide curve: curve: The guide curves control the shape of the solid between the profiles. They must intersect the profile.

1

2

3. Multi-Sect Multi-Sections ions Solid using using Spine: The spine curve controls the shape of the features between the profiles.

Guide 2

3

Spine

4

4. Multi-Sectio Multi-Sections ns Solid Tangent Tangent to adjacent surfaces: The multi-sections solid is tangential to the adjacent solids / surfaces. Here the multisections solid acts as a transitional feature.


25


Create Crea te Mul Multi ti-S -Secti ection ons s Soli ds (2/2) (2/2) 5. Multi-Secti Multi-Sections ons Solid using Couplings: Couplings: The curves are coupled according according to diffe different rent criteria. criteria. These are as follows:

5

a. Ratio Ratio:: The ratio of each section’s section’s length. length. b. Tange Tangency: ncy: Uses tangency tangency discontinuity discontinuity points. c. Tangency Tangency then Curvature Curvature:: uses the tangency tangency discontinuity points first and then later the curvature discontinuity points.

6

d. Verti Vertices: ces: Uses the section’s section’s vertices. vertices. e. Manual couplin coupling: g: Used when various various sections do not have the same number of vertices. 6. Multi-Secti Multi-Sections ons Solid using Relimitation Relimitations: s: By clearing the Relimitation options in the Relimitation tab, the result can be extended to the length of the spine or the guide curves.

Recommendations to avoid twisted surfaces: 

Choose appropriate Closing Points.



Keep consistent directions. Closing Point and Direction is correct


Closing Point s ele elected cted is incorrect

26


Use the Mult Mult i-Body Method The Multi-Body Method allows you to design a complex part using simple bodies. Each body acts independently in the model. The final part is obtained by combining these bodies using Boolean operations. Par t B o d y

B o d y .2

B o d y .3

B o d y .4

The advantages of using the Multi-Body method are as follows: 

It provides an organized approach to modeling complex parts.



Solid features within a body can be hidden independently of the rest of the model.



Groups of geometry can be de-activated by de-activating the body.



Complex geometry is easier to create within a focused area of the model.



The model will update faster due to the organized structure.


27


Boolea Boo lean n Operation Operations s Body 2

A.

Assemble: The result will depend on the polarity of Body.2. A negative feature (pocket or groove), will remove material from the PartBody, a positive feature will add material.

A

Part Body

B.

Add: Ad d: A uni union on of Bo Body dy.2 .2 an and d Par PartB tBod ody. y.

B C

C.

Remo Re move ve:: Body Body.2 .2 wil willl cut cut Part PartBo Body dy.. Body.2 Part Body

D.

Inters Inte rsec ect: t: The The resu result ltin ing g soli solid d is the the mat mater eria iall common to the intersecting elements.

E.

Unio Un ion n Tri Trim: m: Th This is op oper erat atio ion n is is a un unio ion n of of the the two bodies with the option to remove or keep selected faces.

F.

Remo Re move ve Lum Lump: p: A lu lump mp is is mate materi rial al th that at is is completely disconnected from the remainder of a single body, and may appear after certain operations. This operation is used select the faces to remove.


D

Part Body Body.2

Faces to be Faces removed

E

F

28


Crea reate te Mult Mult i-model Li nks 2

The use of Multi-Model Links enable you to design a model using elements from another model. This will enable you to update the part automatically if changes occur in the source model. To create links: 1.

Copy Co py a bo body in th the e sou sourc rce e mod model el..

2.

In th the e tar targe gett mod model el,, rig right ht-c -cli lick ck on th the e Par Partt and and click Paste Special from the contextual menu.

3.

Select Sele ct As Re Resu sult lt wi with th Li Link nk.. The The So Sour urce ce PartBody is copied into the target model.

4.

Comp Co mple lete te th the e tar targe gett mod model el wi with th th the e new new bo body dy..

5.

Modify th the so source mo model.

6.

The Th e tar targe gett mod model el is up upda date ted d to to tak take e int into o account changes to the source model.

1 3

It is recomme recommended nded that copied elements eleme nts b e publi shed. The shared geometry can be restricted to publi shed elements elements only.

4

Choose the Paste Special option that best meets your design requirements: 

As Specified in the Part Document: The copied elements can be edited separately in the target part. A surface cannot be pasted pasted in this this way. way.



As Result: The copied elements cannot be edited in the target part and are not linked to the source part.



As Result with Link: The copied elements cannot be edited in the target part but are linked to the source part. A geometrical set cannot be pasted in this way.


5 6

Note: If you copy a geometrical set and and select the PartBody PartBody for the paste the geometrical set wil l be inserted under the Part Body and NOT at at th e same level as the PartBod PartBod y.

29


Main Ma in Tool Tools s (1/3) (1/3) 1

Advanced Sketch Based Features 1

Rib: Creates a positive solid from a profile

2

swept along the center curve. 2

Slot: Creates a negative solid from a profile

3

swept along the center curve. 3

Solid Combine: Creates an intersection solid from the two two extruded extruded profil profiles. es.

4

Multi-sections Multi-se ctions Solid: Creates a positive solid

4

joining multiple sections. 5

Remove Re move Multi-sections Solid: Extrudes a

5

solid up to a surface. 6

Ad van ced Draf t: Creates a basic line and reflect line drafts with two different draft angles

6

for complex parts. 7

Thickness: Adds Thickness: Adds / Removes thickness to a

7

selected face or a surface. 8

Remove Face: Removes selected faces to simplify the geometry for finite element analysis

8

/ downstream applications. 9

Replace Face: Extrudes a solid up to a surface.


9

30


Main Ma in Tool Tools s (2/3) (2/3) Boolean Operations 10

11

As sem bl e: Creates a union of two bodies, the union respects the true nature of the bodies. (Positive features add material, negative features remove material).

10

Ad d: Creates a union of two bodies.

12

Remove: Removes selected body from the PartBody.

13

Intersect: Creates an intersection solid from the selected bodies.

14

Union Trim: Creates an intersection solid from the selected bodies with an option to remove or keep one side.

15

Remove Lump: Removes selected faces (lumps and cavities).

11

12 13

14 15


12

13

31


Main Ma in Tool Tools s (3/3) (3/3) 16

Multi-Model Links 17

16

Copy: Copies the selected features.

17

Paste Special: Pastes the selected features into the destination.

As Resu Result lt

As Resul t Wi th Li nk

As sp eci ecifi fi ed in in Part Document As Resu Result lt


32


Exerci xercise: se: Rib Rib and Slot Recap Exercise 15 min

In this exercise, you wi ll cr ea eate te a new model and use the too ls l ea earned rned in t he lesson to create a rib and a slot fea feature. ture. High-level High-level instr ucti on is p rovi ded for th is exercise. By th e end end of t his exercise you wi ll be able to: 

Create a Rib Rib Fea Featu ture re



Create a Slot Feature


33


Do it Your Yourself self (1 (1/4 /4)) 1. Cre rea ate a ne new w part part file. file. •

Crea Cr eate te a new new pa part rt fi file le ca call lled ed Ex Ex8B 8B..

2. Cre rea ate the the ce cente nterr curve ske sketch. tch. •

Create Crea te a pos posit itio ione ned d ske sketc tch h as as sho shown wn fo forr the the center curve.

•

Rename the sketch to [Center Curve].


34


Do it Your Yourself self (2 (2/4 /4)) 3.

Cre rea ate a re refe fere renc nce e pla plane ne.. • Create an offset plane as shown.

4.

Cre rea ate a pro profi file le sk ske etc tch h for for the the rib rib.. •

Create Crea te a pos posit itio ione ned d ske skettch as sh show own n for for the rib profile.


35



Cr ea eat e t he he r ib ib f ea eat ur ur e. e. •

7.

Use the Use the ce cent nter er cu curv rve e and and pr prof ofil ile e ske sketc tch h to to create a rib feature.

Cre rea ate a pro profil file e ske sketch tch for the slo slot. t. •

Create Crea te a pos posit itio ione ned d ske skettch as sh show own n for for the slot profile.


36



Cr ea eat e a s lo lo t f ea eat ur ur e. e. •

9.

Create Crea te a slo slott fea featu ture re us usiing the sk sket etch ch created in the last step as the profile and the Center Curve sketch as the trajectory.

Clo lose se th the e fi file le wit witho hout ut sa savi ving ng it it..


37


Exercise Exercis e Recap: Recap: Rib and Slot 

Create a rib



Create Crea te a sl ot


38


Exercis xercise e: Rib and Mul Multi-se ti-sect ction ion Sol olid id Recap Exercise 30 min

In this exercis exercis e, you wi ll op en an an existin g model and use the tool s learnt learnt in t he lesson lesson to create rib and Multi-sections Soli d features. features. High-level High-level instruc tio n is provi ded for this exercise. By the end of thi s exercis exercis e you will be able able to: 

Create a Rib Rib Fea Featu ture re



Create Crea te a Multi-secti ons Sol id Featur Featur e


39



Ope pen n the the exi xist stin ing g pa part fil file e. •

Open Wr Ope Wrench.CATPart. No Notice so some features have already been created.


40


Do it Your Yourself self (2 (2/7 /7)) 2. Cre rea ate a rib rib.. • Use Sket Sketch. ch.13 13 as the the profi profile le for for a rib feat feature ure.. a. Ac Acce cess ss th the e Rib Definiti Definiti on dialog box. b. Sel Select ect Sket Sketch. ch.13 13 as the the profi profile. le. c. Righ Rightt-cl clic ick k the Ce Center nter Cur ve field and click Extract from the contextual menu.

2c

d. Select Select the edge shown shown.. Can the feature feature be created? Why not?

2b

2d


41



Cre rea ate a rib (co cont ntin inue ued) d).. e.

Select the Thick Profile option.

f.

Type [4 mm] in the Thickness1 field.

g.

Complete the feature re..

2f

2g


42



Cre rea ate a prof profile ile for the the mult multii-se secti ctions ons solid solid.. •

4.

3

Create Crea te th the e pro profi file le as sh show own n usi using ng th the e low lower er fa face ce of the pad as the sketch support.

Cre rea ate a se secon cond d profi profile le for the Mult ultiisections solid. sections •

Create Crea te a ref refer eren ence ce pl plan ane e off offse sett [7m [7mm] m] fr from om th the e lower surface of the pad. Create the sketch shown using the reference as the sketch support. The diameter of the sketched circle is [14.4mm].

•

The Th e ske sketc tch h is is cre creat ated ed on a use userr-de defi fine ned d pla plane ne.. After the plane plane is created, created, if you do not rereactivate the PartBody, the sketch will be created in Geometrical Set.1. Move the sketch back to the PartBody by clicking Change Geometrical Set from its contextual menu, and select the PartBody from the specification tree.


4

43



Cre rea ate a mu mult ltii-se sect ctio ions ns sol solid id.. •

Use the Use the pr prof ofil iles es an and d the the lo lowe werr sur surfa face ce of the shaft feature as the profiles for the feature. Notice that the feature is automatically tangent to the shaft.


44



Cre rea ate a se secon cond d mult multii-se secti ctions ons sol solid. id. •

Create Crea te a sec secon ond d mul multi ti-s -se ect ctio ions ns so soli lid d to to complete the handle. Use appropriate surface of the shaft, sketch.4, sketch.5, and sketch.6 as the profiles. Use Spine.1 and Symmetry.1 as guide curves for the feature.


45



Cre rea ate a po pock cke et fe featu ture re.. •

8.

Create Crea te a poc pocke kett fea featu ture re to tr trim im aw away ay th the e excess material from the top of the wrench. Use the XY plane as the sketch support for the pocket feature.

Cla larif rify y the dis displa play, y, sa save ve,, and and close close the model. •

Hide al Hide alll wi wire refr fram ame e and and su surf rfac ace e ele elem men ents ts.. Save and close the model.


46


Exerci Exe rcise: se: Rib and Multi-S Multi -Section ection Soli olid d Reca ecap p 

Create a rib



Create Cre ate a multi-sections s olid


47


Exerci xercise: se: Adva Adv anc nce ed Draft Draft Recap Exercise 20 min

In this exerci exerci se, you wi ll open an exist exist ing part that cont ains sketched wireframe elements eleme nts and a surface feature. feature. To To co mpl ete this mo del you wil l have to cr ea eate te severall advanced draft f ea severa eatures. tures. You wil l also u se pads, variable variable fil lets, and and t he mirro r operation opera tion to com plete this model. High-le High-level vel instructio n is provided for this exe exercise. rcise.

By th e end end of t his exercise you wi ll be able to: 

Ap pl y ad van ced dr aft feat ur es


48



2.

L oa oad Ex Ex 8F 8F.CA TP TPar t. t.

Cre rea ate a pa pad d Featu ture re.. •

Use Ske Use Sketc tch. h.1 1 to to cr crea eate te a pad pad fe feat atu ure wi with a depth of [20mm].


49



Cr eat e a d r af t . •

Create Crea te dr draf aftt on th the e ou outs tsid ide e ve vert rtic ical al wall. a.

Use Us e a dr dra aft an angl gle e of of 2 de degr gree ees. s.

b.

Use the Use the po posi siti tive ve Y dir direc ecti tion on as the pull-direction.

c.

Use Us e th the e ri righ ghtt ve vert rtic ical al fa face ce as th the e neutral plane.

3a

3c

3b


50



Cre rea ate a va varia riable ble ra radiu dius s fille fillet. t. •

Apply Appl y a va vari riab able le ra radi dius us fi fill llet et to th the e top and bottom outside edges. Create the fillet from [4mm] to [6mm] along each side.


51



Cre rea ate an adv adva anc nce ed dra draft ft.. •

Create a two-sided re reflect dr draft. a.

Use the Driving/Driven dependency option.

b.

Sett th Se the e dra draft ft an angl gle e to to 4 de degr gree ees. s.

c.

Use the Use the XY pla plane ne as the the pul ulli ling ng direction for the first side.

d.

Use th Use the e to top p fi fill llet et as th the e ne neut utra rall element for the side one.

e.

Select Sele ct th the e Ext Extru rude ded d sur surfa face ce as th the e parting element.

f.

Use the Use the bo bott ttom om fi fill llet et as th the e neu neutr tral al element for the side two.

5a

5b

5c

5d 5e

5f


52



7.

Cre rea ate two pa pad d fe fea atu ture res. s. •

Use Sk Use Sket etch ch.2 .2 to cr crea eate te a pa pad d fe feat atur ure e with a depth of [30mm].

•

Use Sk Use Sket etch ch.3 .3 to cr crea eate te a pa pad d fe feat atur ure e with a depth of [50mm].

6

A pp pp ly ly an an ad ad va van ce ced dr dr af af t. t. •

Apply an an ad advanced dr draft fe feature to to the two pads. a.

Creat Cre ate e the the dr draf aftt wit with h a 4 de degr gree ee draft angle on the first side.

b.

Use the Use the XY pla plane ne as the pu pull lliing direction for side one.

c.

Use Us e a 6 deg degre ree e dra draft ft an angl gle e on on the the second side.

d.

Use Ext Use Extru rud de. e.1 1 as as the the pa part rtin ing g element.

e.

Set th Set the e Ne Neut utra rall el elem emen entt on bo both th sides equal to the parting element.


7

53



Mi r r o r t h e m o d el . •

9.

Comple Comp lete te th the e mo mode dell by mi mirr rror orin ing g th the e part body about the YZ plane.

Cle lea ar the the mod mode el, sa save ve and clos close e it. •

Hide all wireframe and surface elements and save the model.


54


Exerci Exe rcise se Recap: Recap: Adv Advance anced d Draft 

Create Crea te an advanced draft


55


Exercis xercise e: MultiMulti -Bod Body y Work Recap Exercise 15 min

In this exercise, exercise, you wi ll open an existing part that contains a single feature. feature. You You wi ll use the tools l ea earned rned in th is lesson to perfor m a Boolean operation operation , and and create a multi-model link. High-level High-level instructi ons f or t his exe exercise rcise are provided.


Create Multi-Model links.



Perform Boolean Operations.



Modify Multi-Linked Models.


56



Op en en t he he p ar ar t f ilil e. e. •

2.

Open the existing part file, Bracket_right.CATPart. There are two bodies in this file.

Perfo rform rm a Union Trim ope opera ratio tion n on the PartBody using Body.2. PartBody •

Use the union trim operation to trim Body.2 from the PartBody. Keep the top surface of Body.2 and the cylindrical surface from the PartBody.


57



Cr ea eat e a n ew ew pa p ar t f ilil e. e. •

4.

Tr an an sf sf or or m f ea eat ur ur es es . •

5.

Create a new PartBody called Bracket_Left. Create a multi-model link to the PartBody in Bracket_ri Bracket_right. ght.

Use the symmetry tool to transform the notches in the Bracket_Left Bracket_Left model. Perform the symmetry operation about the YZ plane.

Mod odif ify y the the hol hole e in in Bra Brack cke et_ t_R Rig ight ht.. •

Modify the hole dimension in Bracket_Right Bracket_Rig ht to [5 mm] and update both the models.


58


Exerci Exe rcise: se: Multi-Body Multi -Body Work Reca ecap p 

Create Cre ate multi-model lin ks



Perform Pe rform a Union Trim op era eration tion



Modify multi-model link models


59


Case Stu Study dy:: Desi Design gn Com ompl ple ex Part Parts s Recap Exercise 15 min

In this exercise you wil l create the case stud y mod el. Re Recall call the design i ntent of this model: 

Base feature must include overall dimensions supplied.



Create each support as a single feature.

 A

cut is to be created to simulate the logo. The cut profile varies.



Links must be created to the Disk holder and the flex opening models to ensure conformance to standards.



Linked features must be kept in separate bodies.

 An

indented logo should not be displayed when it goes for manufacturing.

Using the techniq ues you have learnt learnt in th is and previou s lessons , create create the model without detailed detailed instructio ns.


60


Do It Yours You rself elf:: CD Jewel Case Case (1/7) (1/7) You must complete the follow ing tasks: 1.

Cr ea eat e a s ol ol id id co co mb mb in in e. e. • •

2.

Load JewelCase.CATPart Use Us e th the e tw two o sk sket etch ches es su supp ppli lied ed to cr crea eate te a solid combine feature.

Cr eat e a p o c k et . •

Create Crea te a po pock cket et usi sing ng th the e di dimen ensi sion ons s shown on the front view of the drawing.


61


Do It Yours You rself elf:: CD Jewel Case Case (2/7) (2/7) You must complete the follow ing tasks (continued):

3.

Cr eat e a p o c k et . •

Create a second po pocket us using th the dimensions shown. The cut is symmetrical about the ZX plane. This pocket needs to cut the material such that only a 0.79mm thickness is left.

0.79mm


62



4.

Cr ea eat e a r ib ib fe feat ur ur e. e. •

5.

Cre rea ate a se seco cond nd rib rib fe featu ture re.. •

6.

Create Crea te a ri rib b fe feat atur ure e us usin ing g th the e dim dimen ensi sion ons s shown on Detail view C and G of the drawing. The rib is symmetric about the ZX plane.

Create Crea te a ri rib b fe feat atur ure e us usin ing g th the e dim dimen ensi sion ons s shown on Detail view B, E and H of the drawing. The rib is symmetric about the ZX plane.

Cre rea ate a th thir ird d rib rib fe fea atu ture re.. •

Create Crea te a ri rib b fe feat atur ure e us usin ing g th the e dim dimen ensi sion ons s shown on detail view F and the front view of the drawing.


63



7.

Cre rea ate a re remov move ed multimulti-se secti ctions ons sol solid. id. •

8.

Crea eate te the lo logo go usi sing ng a re remo mov ved mu mult ltiisections solid. The lower profile is created on a reference plane that is offset 0.45mm below the top surface of the case. Use Detail view C and Section view D-D for the dimensions.

Cr ea eat e t wo wo p ad ad f ea eat ur ur es es . •

Create tw two pa pad fe features us using th the dimensions shown on Detail views C and G. Consider creating only one Pad feature and mirroring it to create the other.


64



9.

Cop opy y the the Dis iskH kHol olde derr and Fle FlexO xOpe peni ning ng bodies. •

Copy the Di DiskHolder and the FlexOpening FlexOpeni ng bodies from JewelCaseSubPart.CATPart JewelCaseSubP art.CATPart using the Paste Special option As Resu lt Wit h Link .

10. Asse Assembl mbly y the Fle FlexO xOpe penin ning g bod body y to the main body. 11. Use the the remove remove fa face ce tool tool to remove remove the logo from display.


65


Do It Yours You rself elf:: CD Jewel Case Case (6/7) (6/7)


66


Do It Yours You rself elf:: CD Jewel Case Case (7/7) (7/7)


67


Case Ca se Stud y: Jewel Case Recap Recap 

Create Cre ate a solid com bine



Create Crea te rib features



Create a removed mu lti Create sections solid



Create Cre ate multi-model lin ks



Perform Pe rform Boolean operations operations



Remov Re mov e a face


68


Sur urface face De Desi sign gn

3

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to:  Access     

the Surface Design Workbench Create the Reference Geometry Create the Basic Surface Geometry Create the Complex Surface Geometry Perform Operations on Surfaces Solidify the Model

4 Hours


69


Case Ca se Stud y The case study for this lesson is the Computer Mouse.

Design Intent 

Model contours are likely to change. • This mode modell is crea created ted from from point data so that that the the geometry can quickly be changed simply by adjusting point locations.



Point data and Wireframes

Wire-frame, surface and solid geometry must be kept separate.

Surface Geometry

• By creati creating ng separat separate e Geometr Geometrical ical Sets Sets the the model model can be be kept organized to help other users quickly identify the different elements making up the model. 

Buttons must be built as a separate body but update when the changes are made to the main body. • The butto button n geometr geometry y can be create created d in a sepa separate rate body will use surfaces from the main body as limiting elements.

Stages Sta ges in th the e Proc Process ess 1.

Acce Ac cess ss th the e Gene Genera rati tive ve Sur Surfa face ce Des Desig ign n work workbe benc nch. h.

2.

Crea Cr eate te th the e wi wire re-f -fra rame me ge geom omet etry ry..

3.

Crea Cr eate te th the e sur surfa face ce ge geom omet etry ry..

4.

Perform op operations.

5.

Solidify the model.


Solid Geometry

Completed model

70


Introduct Introd uction ion to Ge Genera nerativ tive e Shape Shape Design Design Wireframe and surface geometry is created with Generative Genera tive Shape Design Design workbench workbench to define complex shapes. 

Can be used by novice as well as advanced users.



Provides a set of comprehensive tools for making quick changes in the preliminary design and keeping the accuracy needed for the detailed design.



Lets you control the propagation of modifications when designing in context. You can reuse existing surfaces and other surface models.



Datum curves or skins can be used to drive the design and can be quickly replaced if required.

Surface Design Design Work orkbench bench Ge Genera nerall Process 1.

Acce Ac cess ss th the e Gene Genera rati tive ve Sur Surfa face ce Des Desig ign n work workbe benc nch. h.

2.

Crea Cr eate te the the wir wiref efra ram me geom geomet etrry.

3.

Crea Cr eate te th the e sur surfa face ce ge geom omet etry ry..

4.

Trim Tr im an and d jo join in th the e bo body dy su surf rfac aces es..

5.

Acce Ac cess ss th the e Par Partt Des Desig ign n wor workb kben ench ch..

6.

Create a part bo body.

7.

Modi Mo dify fy geo eome metr try y as ne need eded ed..


2

3

1

4

5 7

6

71


Create Cre ate the th e Referenc Reference e Geom Geometry etry Reference geometries are the basic elements which provide a stable geometric support. They can be used to limit and control the overall size of the part. Examples are: Points, Lines, Planes, and Axis systems.

Side limiting plane

CATIA has a fixed coordinate system called the Absolute Axis System. A point in the model will have coordinates specific to this axis system.

Local Axis Syste System m

You can also define user-defined axis systems known as Local Axis Systems. These can be anywhere in 3D space. There can be multiple axis systems in a single part.

Create Curves Curves are geometrical elements used as limiting elements (lines, planes), guides or references to create other elements. Some examples are: A. Project-Combine curves (Projection curve, Reflect Line Curve, Intersection Curve, Parallel Curve)

Reflect Line Curve

Circle

Intersection Curve

Corner

Parallel Para llel Cur ve

Connect Curve

B. Circular-Conic curves (Circle, Corner, Corner, Connect Curve, Conic) C.Curves (Spline, Helix, Spiral) Spline


Helix

Spiral

72


Crea reate te Curves (conti (con tinued) nued) Great care should be taken while constructing the wire-frame geometry since surfaces inherit any flaws within the parent curves or wire-frame geometry, In a product development cycle a surface would be further used in downstream operations such as prototyping, machining, tooling, etc. and the final product would be adversely affected.

Curve with small flaw, used to make a surface

Curve will always transmit flaw to the surface

Create Crea te the th e Basi Basic c Surface Surf ace Ge Geom ometry etry Complex 3D shapes often need to be defined using surface geometry which is created based on explicit wire-frame construction geometry. Su r f ac e Geo m et r y

Some examples of basic surfaces are: 1. Ext Extrud ruded ed Surface Surface

1

2

So l i d Geo m et r y

3

4

2. Re Revo volv lve e 3. Sp Sphe here re 4. Cy Cyli lind nder er


Ex t r u d e

Rev o l v e

Sp h er e

Cy l i n d er

73


Create Cre ate the Com Compl plex ex Sur Surface face Geometr Geometry y Some examples of complex surfaces are: 1.

2.

3.

Swee Sw eep: p: A su surf rfac ace e ge gene nera rate ted d by sw swee eepi ping ng a profile along a guide curve with respect to a spine. The profile can be a user-defined or pre-defined profile. The shape and quality of the sweep depends upon the spine. Offset Offs et Su Surfa rface ce:: A su surf rfac ace e whi which ch is of offs fset et fro from m the reference surface.

1

Guide

Profile

2

3

4

Fill Fi ll Su Surf rfac ace: e: Cr Crea eate ted d fro from m a cl clos osed ed bo boun unda dary ry.. The boundary can consist of wire-frame elements or edges of existing surfaces. Of f s et Su r f ac e

4.

Sweep

Spine

Blen Bl end d Surf Surfac ace: e: Cre Creat ated ed bet betwe ween en two two wir wireeframe elements.

Fi l l Su r f ac e

B l en d Su r f ac e

Section 1 5

5.

Mult Mu ltii-Se Sect ctio ions ns Su Surf rfac ace: e: Co Comp mput uted ed by pa pass ssin ing g through two or more sections along a spine. The spine defines the shape of the surface between two sections. Various options for defining defini ng multi-sections multi-sections surface surface exists - Guides Guides,, Spine,, Re-li Spine Re-limitati mitation, on, and Canon Canonical ical elements. elements.


Guide Curves

Section 2 Multi-Sections Surface using Guide Curves

74


Perform Operations on Surface Surf aces s Operations such as trim, join, extrapolate, and transform are performed to produce the required finished geometry. Transformations, such as scaling and affinity, help to resize the part. Transformation operations, such as translate and rotate, are required on the wireframe elements to change the positioning of the part in the co-ordinate axis system. Boundary operation extracts internal or external edge of the surface. Extract operation extracts sub-elements of a surface (edge or surface).

Surface Fillet operation to trim the surfaces surfaces

Healing operation to join the surfaces surfaces

Rotation about Rotation axis

Boundary

Sy m m et r y

Ex t r ac t

Solidify Solidi fy th e Model Split

Completing the geometry in Part Design, with hybrid modeling capability of V5, enables the complex surface geometry to shape the solid part. Use the Part Design workbench to integrate surface geometry into a solid part. You can create the following surface based features in Part Design using the surface geometry. 1. Sp Spli litt

Thick Surface

Close Surface

2. Thi Thick ck sur surfac face e 3. Clo Close se sur surfac face e 4. Se Sew w surfa surface ce


Sew Se w Surface

75


Main Ma in Tool Tools s (1/3) (1/3) Wireframe Geometry 1

1

Points: Creates a point or multiple points.

2

Line-Axis: Creates lines, axis or polyline.

2

3

Plane: Creates planes using different options.

3

4

Project-Combine: Projection curve, Combine curve and Reflect Line Curve

4

5

Intersection Curve: Creates a curve at the intersection of two elements.

6

Offs et 2D3D: 2D3D: Creates a parallel curve and offset curve.

5

6

7 7

8

Circle-Conic: Creates circle, corner, connect curve, and conic curve.

8

Curves: Creates a spline, helix, spiral, and spine.


76


Main Ma in Tool Tools s (2/3) (2/3) Surfaces

9

9

Extrude-Revolution: Creates extrude, revolution, sphere, and cylinder surface.

10

Offset: Creates an Offset Surface.

11

Sweep: Creates a swept surface.

11

12

Fill: Creates a fill surface.

12

13

Multi-Sections Surface: Creates a surface passing through multiple sections along the spine.

13

10

14

14

Blend Surface: Creates a blend surface between wireframe elements.

Surface Features 20

Split: Splits a solid using a surface.

21

Thick Surface: Creates a solid from existing surface with thickness specified.

22

Close Surface: Creates a solid by closing the sides of the surface.

23

Sew Surface: Creates a Boolean operation and combines surface and solid.


20

21

22

23

77


Main Ma in Tool Tools s (3/3) (3/3) Operations 15

Join: Joins curves or surfaces.

16

Healing: Heals surfaces surfaces by filling filling in small gaps between the surfaces.

15 16

17

Trim-Split: Creates a Split surface and Trim surface.

18

Boundary: Creates a boundary from edge of the surface.

17

19

Extract: Extracts a face or a surface edge.

21

20

Multiple extract: Extracts a group of elements.

21

Fillets: Creates various types of surface fillets.

18

18

22

19

22

20

Transformations: Creates transformation features featur es – transl translation, ation, rotation, rotation, symmetry, symmetry, scaling, affinity, and Axis to axis.


78


Exercis xercise e: Joi Join, n, Tri Trim m and Clo lose se Surf Surfa ace Recap Exercise 20 min

In this exercise, you w ill o pen an exist exist ing f ile that cont ains the wireframe and and sur face geometry geome try necessary necessary to complete the model. You will use the tools lea learnt rnt in this lesson to perform o pera perations tions and sol idify the model. HighHigh-leve levell inst ructions for thi s exercis exe rcis e are pro vided. By th e end end of t his exercise you wi ll be able to: 

Join Surface Surfaces s



Trim Surfaces



Mirror



Close a Surface


79


Do it Your Yourself self (1 (1/5 /5)) 2 1.

Op en p ar t f i l e. •

2.

Open th the ex existing pa part fifile, Operations_Phone.CATPart. The wireframe and surface geometry has been created for you. a.

Create Crea te a new new ge geom omet etri rica call set set called Operations.

b.

Ens nsur ure e tha hatt th the e Ope pera rattio ion n geometrical set is active.

Join Jo in th the e to top p and and si side de su surf rfa ace ces. s. •

Join Bl Blend.1, Bl Blend.2 an and Sw Sweep.1 to create the top and side surface. a.

Select the Join icon.

b.

Select Sele ct Ble lend nd..1, Ble lend nd..2, an and d Sweep.1.

c.

Click OK OK..


80



Tr i m th th e s u r f ac es . •

3

Trim the top extrude and the join. a.

Select the Trim icon.

b.

Tri rim m Ext xtru rude de.2 .2,, an and d Jo Joiin. n.1 1

c.

Use the Other side of eleme element nt buttons to create the trim as shown.

d.

Click OK to complete the operation.

4 4.

Tr i m th th e s u r f ac es . •

Trim th the bo bottom ex extr tru ude an and th the tri trim m feature. a.

Select the Trim icon.

b.

Trim Tr im Ext xtru rude de..3, and Tri rim m.1.

c.

Use the Other side of eleme element nt buttons to create the trim.

d.



81



Mi r r o r t h e m o d el . •

6.

5

Use th the Sy Symmet etrry to tool to to cr create th the other side of the model. a.

Select the Symmetry icon.

b.

Mirr Mi rror or Tr Trim im.2 .2 ab abou outt the the ZX pl plan ane. e.

c.


d.

Hide Ex Hide Extr trud ude. e.1 1 fr from om th the e Su Surf rfac ace e geometrical set.

J o i n t h e s u r f ac e. •

Complete th the su surface mo model by by joining the two halves. a.

Select the Join icon.

b.

Sele Se lect ct Tr Trim im.2 .2 an and d Sy Symm mmet etry ry.1 .1..

c.



6

82



So l i d i f y th th e m o d el . •

8.

7c

Use the Use the Cl Clos ose e sur surfa face ce to tool ol to so soli lidi dify fy the model. a.

Access th the Part Design workbench.

b.

Activate the the PartBod ody y.

c.

Select the Close Surface icon.

d.

Sel elec ectt Joi Join. n.2 2 as as th the ob obje ject ct to close.

e.


A dd dd va var ia iab le le f ilil le let s. s. •

Compl Com plet ete e the the mo mode dell by by add addin ing g fil fille lets ts.. In In this step, add variable fillets to the bottom side edges. a.

Select the Variable Edge Fillet icon.

b.

Select Sele ct bo both th th the e edg edges es of th the e bot botto tom m of of the model.

c.

Crea Cr eate te th the e fil fille lets ts wi with th a [2m [2mm] m] ra radi dius us at the top and [4mm] radius at the bottom.

d.



7e

7d 8

83



A p p l y ed ed g e f i l l et s . •

Create ed edge fifillets fo for th the to top an and middle side edges. a.

Select the Edge Fillet icon icon..

b.

Sel elec ectt the the top an and d mid middl dle e edg edges es on both sides (four edges).

c.

Use a [2mm] radius.

9

10. App Apply ly edge fill fille ets. •

Complete the model by adding 2mm edge fillets to the top and bottom faces of the model.

10

11. Save and close close the mode model. l.


84


Exerc Exe rcis ise: e: Join, Joi n, Tri Trim m and Close Sur Surface face Recap Recap 

Join sur face faces s



Trim sur face faces s



Mirror



Close a sur face


85


Case Stu Study dy:: Sur urface face De Desi sign gn Recap Exercise 40 min

In this exercise, you wil l create the case case study model. Recall Recall th e design design intent o f this model:



Model contours are likely to change.



Wireframe, surface, and solid geometry must be kept separate.



Buttons must be built as a separate body, however it must be updated when changes are made to the main body.

Using the techniq ues you have learned learned in th is and previo us lesson s, create create the model with only hi gh-le gh-level vel instruction.


86


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (1 (1/1 /15) 5) You must complete the follow ing tasks:

1.


2.

Create a new part file. Create a geometrical set inside the part called Wireframe and make the Wireframe geometrical set active.

1

2

Cr ea eat e a s em em ii-c ir ir cl cl e. e. •

Create a semi-circle.

•

Select XY plane as support.

•

Crea Cr eate te th the e cen cente terr-po poin intt for for th the e cir circl cle e at: at: X = -44.45, Y = 0, Z = 0.

•

Have Ha ve th the e ci circ rcle le ru run n th thou ough gh a po poin intt lo loca cate ted d at at:: X = 0, Y = 0, Z = 0.

•

Create Crea te th the e cir circl cle e sta start rtiing at –9 –90d 0deg eg an and d ending at 90deg.


87


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (2 (2/1 /15) 5) You must complete the follow ing tasks (continued): 3.

Cr eat e a s p l i n e. •

3

Crea Cr eate te a spl splin ine e thr throu ough gh th the e fol follo lowi wing ng po poin ints ts:: Pt1: X = 6.65, Y =0.00, Z = 12.70. Pt2: X = -38.10, Y = 0.00, Z = 25.40. Pt3: X = -69.85, Y = 0.00, Z = 31.75 Pt4: X = -121.92, Y = 0.00, Z = 12.70 Pt 5: X = -139.70, Y = 0.00, Z = 0.00

4.

In te ter se sec t el el em em en en ts ts . •

Using Usin g the the In Inte ters rsec ectt too tooll to to int inter erse sect ct the Spline with the YZ plane.

4


88


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (3 (3/1 /15) 5) You must complete the follow ing tasks (continued):

5 5.

Pr oj oj ec ec t el em em en en ts ts . •

6.

Project th the se semicircle en end po points onto the YZ plane.

Cr ea eat e t ri ri mm mm ed ed ci ci rc rc le le. •

Create another circle using the Trimmed Circle option. Create the circle through the intersected and projected points.

6


89


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (4 (4/1 /15) 5) You must complete the follow ing tasks (continued):

7 7.

Cr eat e a s p l i n e. •

Create Crea te a spl splin ine e thr throu ough gh th the e fol follo lowi wing ng points: Pt1: X = 0.00, Y =38.10, Z = 0.00. Pt2: X = -38.10, Y = 38.10, Z = 0.00. Pt3: X = -68.58, Y = 44.45, Z = 0.00 Pt4: X = -85.09, Y = 50.80, Z = 0.00 Pt 5: X = -114.30, Y = 38.10, Z = 0.00 Pt 6: X = -127.00, Y = 0.00, Z = 0.00

•

Create Crea te th the e las lastt poi point nt ta tang ngen entt to to the the ZX plane.


90


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (5 (5/1 /15) 5) You must complete the follow ing tasks (continued): 8.

Cre rea ate a ne new geom geome etr tric ica al set. set. •

9.

9

Create Crea te a ne new w ge geom ome etr tric ical al se sett ca call lled ed Body surfaces and ensure it is active.

Cr ea eat e a s we wep t su su rf rf ac ac e. e. •

Create a swept su surface us using circle.2 as the profile and spline.1 as the guide curve.

10. Cre rea ate an an extru extrude de.. •

Create an an ex extruded su surface us using Spline.2 as the profile. Extrude the surface [24.5mm] in the direction of the XY plane.


10

91


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (6 (6/1 /15) 5) 11

You must complete the follow ing tasks (continued): 11. Cre rea ate an an extru extrude de.. •

Create an an ex extruded su surface us using Circle.1 as the profile. Extrude the surface [24.4mm] in the direction of the XY plane.

12. Cre rea ate a ble blend. nd. •

Create Crea te a bl blen ende ded d su surf rfac ace e to co con nne nect ct the two extruded surfaces.

•

Apply te tensions on on th the bl blend as as shown.

12

12


92


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (7 (7/1 /15) 5) You must complete the follow ing tasks (continued): 13. Cre rea ate a sha shape pe fille fillet. t. •

Create a [25.4mm] shape fillet between the two extruded surfaces.

13 14. Perfo rform rm a join join opera operatio tion. n. •

Join Bl Join Blen end. d.1 1 an and d Fi Fill llet et.1 .1 us usin ing g th the e Join operation.

14


93


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (8 (8/1 /15) 5) You must complete the follow ing tasks (continued): 15. Extra xtrapola polate te an edge edge.. •

Extrapolate th the ed edge of of th the sw sweep [12.7mm].


94


Do It It Yourself Your self:: Model of Compu Computer ter Mouse Mous e (9 (9/1 /15) 5) You must complete the follow ing tasks (continued): 16. Tri rim m su surf rfa ace ce.. •

Trim Join.1 and Extrapol.1.

17. Soli olidif dify y the mod mode el. •

Activate th the Pa PartBody an and us use th the close surface tool to solidify Trim.1.

16

17


95


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (10 (10/1 /15) 5) You must complete the follow ing tasks (continued): 18. Offs ffse et a sur surfa face ce.. •

Reactivate th the Bo Body Su Surfaces geometrical set.

•

Offset Offs et Sw Swe eep ep.1 .1 us usiing th the e of offs fset et to tool ol [5mm].

19. Extra xtrapola polate te the bound bounda ary. •

Extrapolate th the ed edge of of th the of offset surface [12mm].


18 19

96


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (11 (11/1 /15) 5) You must complete the follow ing tasks (continued): 20. Cre rea ate a ske sketch tch.. •

Create a plane [46mm] above the XY plane. Use this plane as the sketch support to create the sketch shown.

•

Project th the th three cu curves al along th the front of the mouse and create a vertical line from the lower curve endpoint to a location on the upper curve. Use the trim tools to trim the upper projected line to the vertical line.


97


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (12 (12/1 /15) 5) You must complete the follow ing tasks (continued): 21. Cre rea ate a poc pocke ket. t. •

•

Use th the sk sketch as as th the pr profile fo for a pocket feature. Extrude the pocket up to the extrapolated offset surface.

21

Create the pocket using Thin Pocket options with 2mm thickness.

22. A dd dd t hi hi ck ck ne nes s. s. •

Use the Th Use Thic ickn knes ess s to tool ol to ad add d [– [–3m 3mm] m] of thickness to the top of the pocket surface.

22


98


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (13 (13/1 /15) 5) You must complete the follow ing tasks (continued): 23. A dd dd t hi hi ck ck ne nes s. s. •

23

Use th Use the e Th Thic ickn knes ess s to tool ol to ad add d [– [–1m 1mm] m] to the back surface.

24. Cre rea ate a ne new w body. body. •

Create a new body called Button.

25. Cre rea ate a ske sketch tch.. •

Copy Sk Sketch.1 fr from th the po pocket in into the Button body.

•

Edit the sketch as shown.


25

99


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (14 (14/1 /15) 5) You must complete the follow ing tasks (continued):

26

26. Cre rea ate a pa pad fea feature ture.. •

Create a pad fe feature us using th the copied sketch.

•

Limit th the pa pad fe feature be between Sweep1and extrapolate.2.

27. She hell ll the the bu butt tton ons s •

Hide the PartBody and shell the buttons to a [2mm] inside thickness.

•

Click OK to the warning message.

•

Remove all the lower and inside faces from the pad feature.

27


100


Do It It Yours You rself: elf: Model of Compu Computer ter Mouse Mous e (15 (15/1 /15) 5) You must complete the follow ing tasks (continued):

28. Cla larif rify y the the dis displa play. y. •

Show th the Pa PartBody an and th the Bu Buttons body. Hide the Wireframe and Body Surfaces geometrical sets.

29. Save and close close the mode model. l.


101


Case Ca se Study: Stud y: Surf Surface ace Design Design Re Recap cap 

Create points



Create Crea te spl ines



Create projections



Create intersections



Create Crea te cir cles



Create Crea te swept s urf aces



Create Crea te extr udes



Create Crea te bl ends



Create Crea te fil lets



Perform Pe rform a join op era eration tion



Extrapolate a boundary



Trim elements



Offset elements



Close a surface


102


An A n al aly y ze and an d A n n o t at ate e Part Par t s

4

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to:  Analyze

the Part Create 3D Constraints  Annotate the Part 

3 Hours


103


Case Ca se Stud y The case study for this lesson is a Bracket part.

Design Intent 1. The model needs needs to be analyzed analyzed and scanned scanned to verify that it follows company policy. 2. The model needs needs to be constraine constrained. d. The creator of this model incorrectly constrained the holes. You need to make corrections. 3. Notes must must be added. Your Your company company policy requires that you make note of changes that you have made to the part.

Stages Sta ges in th the e Proc Process ess 1. Ana Analyz lyze e the Par Partt 2. Create 3D Constr Constraints aints

Bracket

3. Ann Annota otate te the the Part Part


104


An A n al aly y ze th t h e Part Par t The following types of analysis can be done: A. Thread and Taps Analysis: Used to visualize threads and tap information.

A

B

C

B. Draft Analysis: Used to analyze the ability of a part to be extracted for mold design. C. Surfacic Curve Analysis: Used to analyze high quality surfaces.

Create Crea te 3D Const rain raints ts A 3D constraint is created on the 3D model. There are two types of 3D Constraints. Regular Constraints drive the design of the part, and can be driven if necessary. Reference Constraints are created and displayed in parentheses in place of Regular constraints if there a dimension exists which constrains the same aspect of the part.

Thread and Tap An aly si Analy sis s

Dr af t A n al y s i s

Cu r v at u r e A n al y s i s

Select View > Render Select Render Style >Customi zed View and check the Material option to view the Draft and Curvature Analysis

3D Constraints Constrain ts

An A n n o t at ate e th t h e Part Par t Annotations are added to display the additional information about the part. Some of the annotations that can be added to the part are Text, Text with Leader, and Flag Note. A Flag note links to the information stored in an external file.


Tex t w i t h L ead er

Fl ag No t e

105


Main Tools Analysis Toolbar 1 1

Draft Dra ft An alysis: alysis: Analyzes Analyzes the drafts on a part.

2

Curvature Curva ture An alysis: alysis: Analyzes Analyzes the curvature.

3

Thread and Tap Analysi s: Creates planes Thread using different options.

2

Constraints 4

Constraint: Creates a 3D Constraint in a part.

3

4

Annotations Toolbar 5

Text w ith L ea Text eader: der: Creates annotation on a part with a leader.

6

Flag Note: Creates annotation on a part which links to an additional information stored in an external file.


5

6

106


Case Stu Study dy:: Analyze A nalyze and An Anno notate tate Pa Part rts s Recap Exercise 40 min

In this exercise, you wil l create the case study mo del. Reca Recall ll t he design in tent of this model



Model needs to be Analyzed



Model needs to be constrained



Notes must be added

Using the techniq ues you have learned learned in this and p revious l essons, create create the model without detailed detailed instruct ions.


107


Do It Your self: Ann Annotate otate the Br acke ackett (1/3) (1/3) 3

You must complete the follow ing tasks: 1.

Op en a p ar t f i le le. •

2.

Sc an t h e p ar t . •

3.

Open Bra Brack cke et-complete.CATPart.

Scan the the part us using th the Sc Scan to tool.

Per fo fo rm rm a Dr af af t A na nal ys ys is is . •

Convert th the vi view mo mode to to Ma Materi ria al.

•

Per erffor orm m a Dr Draf aftt Ana naly lysi sis s on th the e pa part rt.. a.Use the Quick Analysis mode b.Select the Color Scale and On The Fly options.

4.

4

Perfo rform rm a Tapp-T Thre hrea ad Ana Analys lysis. is. •

Per erfo form rm a Tap ap-T -Thr hrea ead d Ana Analy lysi sis s on on the the part. a.Clear the Show thread option. b.Verify that all other options are selected except for Diameter.


108


Do It Your self: Ann Annotate otate the Br acke ackett (2/3) (2/3) You must complete the follow ing tasks: 5.

Co ns ns tr tr ai ai n t he he p ar ar t. t. •

6.

One of the ho One hole les s wa was s cr cre eat ated ed too cl clos ose e to a fillet. Constrain this hole to be [165mm] away from the other.

A n n o ta tat e t h e p ar t . •

Creatte a tex Crea extt no notte in indi dica cattin ing g tha thatt the the hole has been shifted. Enter the following text: [Hole was created too close to fillet. Distance has been changed from [118mm] to [165mm]. 5

6

5


109


Do It Your self: Ann Annotate otate the Br acke ackett (3/3) (3/3) You must complete the follow ing tasks:

6.

Anno An nota tate te th the e pa part rt (co (cont ntinu inue ed) d).. •

Create Crea te a fl flag ag no note te,, re refe fere renc ncin ing g a fi file le th that at lists the assemblies in which this part will be used in. a.

Name: Assembly List

b.

Link to File or URL: Assembly_List.xls

c.

Modi Mo dify fy th the e not notes es su such ch th that at th they ey ar are e always parallel to the screen.

d.

Hide th Hide the e two two vi view ew pl plan anes es th that at we were re created while creating the two notes.


6

110


Case Ca se Stu Study dy:: Analyze An alyze and Anno An notate tate Parts Parts Recap 

Scan a Part



Perform Pe rform a Draft Draft Analysis



Perfo Pe rfo rm a Tap-Thread Tap-Thread Analys is



Constr ain a Part Part



An no tat e a Part


111


Sharing Information

5

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to:    

Create a Power Copy Create Parameters and Formulas Create a Design Table Create a Catalog

4 Hours


113


Case Ca se Stud y The case study for this lesson is the angle bracket catalog.

Design Intent 1. You must be able able to modify the diamete diameterr of the boss hole. 2. The rib of the angle angle bracket bracket must be related related to the length.

Po w er Co p y

B r ac k et

3. A catalog catalog of angle brackets brackets must be availabl available. e.

Stages Sta ges in th the e Proc Process ess 1. Cre Create ate a Powe Powerr Copy Copy 2. Creat Create e Parameters Parameters and Formul Formulas as 3. Creat Create e a Desig Design n Table Table 4. Cre Create ate a Cat Catalo alog g

Catalog Ca talog of Bracke Brackett w ith various design configurations


114


Create a Power PowerCopy Copy A PowerCopy consists of a group of one or more features that can be re-used in other models. It differs from a typical copy because it contains references which enable you to position the copied features when inserting it in another model. PowerCopies are stored PowerCopies stored in the original model model or in a Catalog. PowerCopy Creation

While instantiating PowerCopies in the destination documents, you need to specify the necessary inputs and parameter values which will drive the feature parameters being instantiated. An instantiation of a PowerCopy includes all the design specifications that originally made up the PowerCopy PowerC opy and the features features can be modified. modified.

PowerCopy Instantiation

An instantiation of a User Feature hides the design specifications to preserve confidentiality of the features.

Po w er Co p y


Us er f eat u r e

115


Intro ntroducti duction on to Know ledge ledgewa ware re CATIA V5 Knowledgeware is a set of tools to assist engineering decisions by detecting design errors and automating design for maximum productivity. The following terminology is used: A.

A parameter is a property with a given value defined as a feature in the specification tree.

B.

A rel relat atio ion n is is a ge gene neri ric c nam name e for for kn know owle ledg dge e features, such as formulas and design tables.

C.

A for formu mula la de defi fine nes s how how a par param amet eter er is calculated with respect to other parameters.

D.

A des desig ign n tab table le is an MS Ex Exce cell or or tex textt tab table le constraining a set of parameters. Each column defines parameter values. Each row defines a configuration.

E.

A con confi figu gura rati tion on is a set set of pa para rame mete terr val value ues. s.

A

B C

D E

Create Parameter Parameters s There are two kinds of parameters: intrinsic and user. Intrinsic parameters are created automatically. User parameters are created explicitly by the user. Parameter values can be defined by relations or used as arguments in a relation.


The Wheel Wheel Rim has a n umber of user parameters. Number_of_Spokes Number_of_S pokes is one such parameter. parameter. Above images images show two configurations of the part create created d by tw o different values of t he Number_of_Spokes. Number_of_Spokes.

116


Create Crea te Formul Form ulas as Formulas are relations used to define or constrain any parameter. They can be defined with parameters, operators, and functions. For example a formula is created the moment you attribute a user parameter to a feature. The left part of the relation is the parameter to constrain and the right part is a statement. When you are editing a formula, you can use predefined functions, such as measures. The functions allow you to capture values from the geometry.

Create a Design Table The design table provides you with a means to create and manage component families. These components can, for example, be mechanical parts differing in their parameter values. A design table can be created from the CATIA document parameters or from an external file. The values defining the design table are stored either in a Microsoft Micros oft ® Excel file or in a tabulated tabulated text file.


The Bolt Design uses the Design Table. Different Diffe rent conf igurations of the bolt refe referr to different rows in the design table. Each row has a set of p arame arameters ters that drive the design of the bolt.

117


Create Crea te a Catalog Catalo g A catalog is a library of stored items used to avoid having to recreate frequently used geometry.

A

Catalogs can be created using the Catalog Editor Workbench. A catalog structure consists of the following elements: A. Document: For example, an ISO Standards catalog will contain ISO standard parts.

B

D

C

B. Chapter: Used to group entities with a common classification. i.e. Fasteners. Chapters may contain several component families such as Bolts,, Pins Bolts Pins and and Nuts. C. Family: A set of components with the same classificat class ification. ion. For example – all types of Bolts. D. Component: It is a reference to an entity stored in the catalog. catalog. For For example example – a Screw. Once the catalogs have been created, the catalog browser allows you to preview the objects in the catalog as well as to view and sort the object descriptions.


118


Main Ma in Tool Tools s (1/2) (1/2) PowerCopy Tools 1

PowerCopy / PowerCopy Creatio Creatio n: Creates a new PowerCopy feature. The exact location of the PowerCopy tools varies depending on the active workbench. It can be accessed from Insert > Know ledge Templ Templ ates menu or Insert > Advanced Replication Tools Menu.

2

Save In In Catalog : Saves a PowerCopy feature in a Catalog.

3

Instantiate from Document: Instantiates a Instantiate PowerCopy from the existing document.

4

Catalog Browser: Instantiates a PowerCopy Catalog from a Catalog.

1

3

2

Knowledge Toolbar 5

Formula: Creates parameter / formula using the Formula editor.

6

Desig De sig n Ta Table: ble: Creates a design table.

4

5


6

119


Main Ma in Tool Tools s (2/2) (2/2) Chapter Toolbar 7

Ad d Ch apt er: er: Adds Adds a new Chapter in a Catalog/active Chapter.

7

8

Ad d l in k t o A no th er Cat alo g: g: Adds Adds link to another catalog.

8

9

Ad d Fam il y: y: Adds Adds family in a Chapter.

9

10

Ad d Par t Fam il y: Creates a Part family.

10

Data Toolbar 11 11

12

Ad d K eyw o rd : Adds a keyword to a chapter/component family.

12

Ad d Co mp on ent : Adds a component in a family.

Browser Toolbar

13

Display With With B rowser: Displays a catalog browser.


13

120


Exe xerci rcise se:: PowerC PowerCopy opy and Cata Catalog log Recap Exercise 10 min

In thi s exercise, you wi ll crea create te a PowerCopy, PowerCopy, save it, and inst antiate it. The features features to be inclu ded in the PowerCopy PowerCopy have alre already ady been been constructed for you. Limi ted instructi ons are provided for this exercise. exercise. By th e end end of t his exercise you wi ll be able to: 

Create a PowerCopy



Save Sa ve PowerCopy PowerCopy in a catalog catalog



Instantiate Insta ntiate a PowerC PowerCopy opy from a catalog catalog


121



Ope pen n Ex5 x5BR BRe efe fere rence nce..CAT ATP Part.

2.

Cre rea ate a Powe owerC rCopy opy of the poc pocke kett and and its sketch. a.

Select Sele ct Po Pock cket et.1 .1 an and d Ske Sketc tch. h.2 2 for for th the e PowerCopy.

b.

Rena Re name me th the e inpu inputt to to [Sup [Suppo port rtin ing g Fac Face] e]..

c.

Publis Publ ish h the the fo foll llow owin ing g par param amet eter ers: s: DepthDirection1, DepthDirection2, DistFromBottom, Height, and DistFromSide. D istFromSide.

d.

Take Ta ke a scr scree een n gra grab b of of the the po pock cket et..

e.

Click OK to complete the PowerCopy.

2b 2a

2c 2d

2e


122


Do it Your Yourself self (2 (2/4 /4)) 3. Save the Powe owerC rCopy opy in a ne new w cata catalog log.. a.

Click Insert > Kno wl edge Templ Templ ates > Save Save In In Catalog. The Catalog Save dialog box appears.

b.

Click Clic k on th the… e… bu butt tton on sho shown wn to to sele select ct a dire direct ctor ory y and name for the catalog. The File Selection dialog box appears.

c.

Speci Sp ecify fy a dir direc ecto tory ry an and d a na name me fo forr the the ca cata talo log. g.

d.

Click Open to accept the directory and name.

e.

Click OK to save.

4.

Sav e t he he d oc oc um um en en t. t.

5.

Cl os os e t he he d oc oc um um en en t. t.

6.

Op en en Ex Ex 5B 5B .C .CA TP TPar t. t.


3

3b

123



Inst nsta anti ntia ate the Powe owerC rCopy opy fro from m the the ca cata talog log.. a.

Click the Open Catalog icon.

b.

Click the Brow se another another catalog icon, locate the saved catalog, select it, and click Open Open..

c.

Doub Do uble le-c -cli lick ck on Po Pow wer erCo Copy py..

d.

Double-click on on 1 inp npu ut.

e.

Sing Si ngle le-c -cli lick ck on on Pow Power erCo Copy py.1 .1 pr prev evie iew. w.

f.

Double Doub le-c -cli lick ck on Po Powe werC rCop opy. y.1 1 to to sel selec ectt thi this s object for instantiation. The Insert Object dialog box appears.

7d

7a 7b

7c

7e


124



Inst nsta anti ntia ate the Powe owerC rCopy opy fro from m the the ca cata talog log (continued). g.

Select the face shown.

h.

Select the Parameters button.

i.

Chan Ch ange ge th the e val value ue of th the e Hei Heigh ghtt par param amet eter er to [15mm].

j. k.

7g

Close.. Click Close

7h

Click OK in the Insert Object dialog box.

7k

7i

7j


125


Exerci Exe rcise: se: PowerCopy PowerCopy and Cata Catalog log Recap Recap 

Create a PowerCopy



Save Sa ve a PowerCopy PowerCopy in a catalog catalog



Instantiate a Powe Instantiate PowerCopy rCopy from a catalog


126


Case Stud Study: y: Sharing Info nformatio rmation n Recap Exercise 30 min

In this exercise, you wil l create and and add a PowerCopy PowerCopy t o the case study m odel. Then The n you will add the case case study model to a part part family catalog. Re Recall call the design intent of this model:



You must be able to modify the diameter of the boss hole.



You must be able to access all features of the template geometry in the speci specificati fication on tree.



The rib of the angle bracket must be related to the length.

 A

catalog of angle brackets must be available.

Using the techniq ues you have learned learned in this and p revious l essons, create create the model with only high-level high-level instructi on.


127


Do It It Yourself Your self:: Angl An gle e Br Bracket acket Catalog Catalog (1/8) (1/8) You must complete the follow ing tasks: 1

1.


Create a new pa part fifile na named Bo Boss. 2

2.

3.

Cr eat e a Pad . •

Cre rea ate a Pad wit ith h di dime men nsi sion ons s 20 20m mm x 20mm x 1mm.

•

Sketch on the XY plane.

•

Con ons str tra ain th the e low lower er,, lef leftt cor corne nerr of of th the square section to the sketch origin.

Cr eat e a Po i n t . •

Create Crea te a po poin intt at th the e ce cent nter er of th the e top top fa face ce of the pad.


3

128


Do It It Yourself Your self:: Angl An gle e Br Bracket acket Catalog Catalog (2/8) (2/8) You must complete the follow ing tasks (continued): 4

4.

Cr eat e a Pad . • •

5.

Sel elec ectt th the e to top p of of Pad Pad..1 as as th the e sket etc ch support. Crea Cr eate te a cyl cylin indr dric ical al pa pad d and and co cons nstr trai ain n the the circular sketch sketch to Point.1. The face of Pad.1 and Point.1 should be the only references selected.

•

Ente En terr [5 [5mm mm]] fo forr th the e di diam amet eter er of th the e ci circ rcle le..

•

Enter [1mm] for the First Li Limit.

•

Enter [2 [2mm] fo for th the Se Second Li Limit.

Cr eat e a Ho l e. • •

Pree-s sel ele ect th the e to top fa fac ce of Pa Pad. d.2 2 an and d Point.1.

5

Cre rea ate a 3mm 3mm dia iame mete ter, r, simp mple le ho holle tha thatt goes up to last.


129



6.

Cr eat e a Fi l l et . •

7. 8.

Sav e t h e m o d el . Cr eat e a Po w er er Co p y • • •

•

9.

Create Crea te a 0.5 0.5mm mm edg dge e fil fille lett on on the the top an and d bottom face of the part.

A Pow Power erCo Copy py is us used as al all fea featu turres of the boss must be accessible. Add Ad d Pad ad..2, Ho Holle. e.1, 1, and Ed Edg geF eFiill llet et.1 .1 Rename the following Inputs: – Pad.1\Face.1 = PlaceSurf – Point.1 = PlacePnt PlacePnt Add the following Parameters: – Radius of circle circle in the sketch sketch for Pad.2 – Diameter of Hole.1 Hole.1

8

Save th the e mo mode dell and and cl clos ose e th the e wi wind ndow. ow.


130



10.

Ope pen n Angle AngleBra Bracke cket. t.C CAT ATP Part.

11.

Cr ea eat e a Po in in t. t. •

12.

Cre rea ate a Para ralle llell Curve Curve.. • •

13.

Crea Cr eate te a Cir Circ cle / Sph pher ere e cen cente terr po poin int. t.

Acces Acc ess s th the e Ge Gene nerrat atiive Sha Shape pe De Des sig ign n workbench. Offset the curve by [5mm].

Cre rea ate two Poi oint nts. s. •

Crea Cr eate te an On On cu curve poi point nt at th the e mi midp dpo oint nt..

•

Crea Cr eate te an On On cu curve poi point nt at th the e en endp dpoi oint nt..


12

11

131



14.

15.

Ins nse ert a Powe owerC rCop opy. y. •

Acce ces ss the Pa Parrt De Des sign Wor ork kbe benc nch. h.

•

Instantiate fr from Bo Boss.CATPart.

•

Sel elec ectt Pla lac ceS eSu urf an and d Pl Plac aceP ePnt nt ref efe erenc nces es to place PowerCopy.1.

Ins nse ert two two Pow Powe erC rCop opys ys.. •

•

Use th the e Re Rep pea eatt opt ptiion to ins nser ertt two instances of PowerCopy.1 from Boss.CATPart. Modify the parameters: – Pad radius = [3mm] – Hole diameters = [4mm]

15


132


Do It It Yourself Your self:: Angl An gle e Br Bracket acket Catalog Catalog (6/8) (6/8) You must complete the follow ing tasks (continued):

16.

Mir irro rorr two two Pow Powe erC rCop opys ys..

17.

Hide all wirefra wireframe me ele eleme ments nts..

18.

Sav e t he he m od od el el .

19.

16

Cre rea ate Para rame mete ters: rs: • Wa Wall llLe Leng ngth th = 160 160mm mm fr from om Ske Sketc tch. h.1 1 • Sh Shel elfL fLen engt gth h = 100m 100mm m from from Ske Sketc tch. h.1 1 • Rib RibWal Walll = RibL RibLimi imit1 t1 in in Geom Geometr etric ical al Set Set.1 .1 • Rib RibShe Shelf lf = RibLi RibLimi mit2 t2 in in Geome Geometr trica icall Set. Set.1 1

20.

20

Cre rea ate For ormu mula las: s: • Ri RibW bWal alll = Wa Wall llLe Leng ngth th – (W (Wal allL lLen engt gth/ h/10 10)) • Ri RibS bShe helf lf = Sh Shel elfL fLen engt gth h – (S (She helf lfLe Leng ngth th/1 /10) 0)


133



21.

22.

23.

Fl ex ex th t h e m od od el el . •

Modify WallLength to [200mm].

•

Modify ShelfLength to [140mm].

•

Update the model.

Cre rea ate a De Desig sign n Ta Table ble.. •

Create Crea te a des esiign tab ablle wit ith h curren entt parameter values.

•

Add Wa WallLength and Sh ShelfLength

•

Edit th Edit the e ta tab ble to ad add d Par arttNu Num mbe berr col olu umn and 12 instances.

•

Create Crea te Part rtN Num umbe berr par ara amet ete er in CA CAT TIA to associate associate with the PartNumber column in the design table.

22

Save the mod mode el and and close close the win window. dow.


134


Do It It Yourself Your self:: Angl An gle e Br Bracket acket Catalog Catalog (8/8) (8/8) You must complete the follow ing tasks (continued):

24.

25.

26.

Cre rea ate a Cata talo log. g. •

Rename Ch Chapter.1 to to [Bracket].

•

Save as Bracket.catalog.

24

A dd dd a Par t Fam ilil y. y. •

Rena Re nam me th the fa fami mily ly to [A [Ang nglleB eBrrac ack ket et]. ].

•

Add An AngleBracket.CATPart.

•

Resolve the Part Family.

Test the the Desig sign n Ta Table ble.. •

Open HM HMR-L007 in in a new wi window. 25

27.

Save the ca cata talog log and and close close all windows.


135


Case Study: Sharing Infor Information mation Reca ecap p 

Create a PowerCopy



Instantiate a PowerCopy



Modify PowerCopy parameters



Mirror a PowerCopy



Create Parameter Parameters s



Create Crea te Formu las



Create a Design Table

 

Ad d a Par t Fami Fa mi ly to a Catal og Resol Re sol ve Catalog Catalog in stances


136


As A s s em emb b l y Des Desii g n

6

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to: 

Manage the product structure Create flexible sub-assemblies  Analyze the assembly  Create scenes  Create annotations  Generate reports 

4 Hours


137


Case Ca se Stud y The case study for this lesson is a lighting fixture.

Design Intent 1. You must be familiar familiar with with associated associated files files 2. Modify the position position of a sub-assembl sub-assembly y without affecting other instances 3. Check for interf interference erence 4. Define an explode exploded d state and save save it for future use

Lighting Fixture assembly assembly

5. Add textual textual infor information mation

Stages Sta ges in th the e Proc Process ess 1. Manage the product product structur structure. e. 2. Create flexible flexible sub-ass sub-assemblie emblies. s. 3. Analyz Analyze e the the assembl assembly. y. 4. Cre Create ate sce scenes nes.. 5. Create annota annotations tions.. 6. Gen Genera erate te reports reports..


Lighting Fixture assembly: assembly: Fle Flexible xible As semb ly co nc Assemb ncept ept is il lu st rat rated ed i n the t he abo ve example.

138


Mana anage ge the Prod Product uct Struct Structure ure An assembly document contains links to all related CATIA documents and external files such as text and Excel files. The File > Desk command can be used to display and manage the product structure.

Product Structure links viewed using File > Desk command

1. Visua Visualize lize the structure structure of linked linked components. components. 2. Load / Unload Unload individual individual component components. s.

Root Product Child Documents

3. See the the links of CATProduc CATProduct. t.

Other linked documents

4. View the the properties properties of componen component. t. 5. Find missing missing components components and re-create re-create links. links.

Product Structure links viewed using Edit > Links command

The Edit > Links command can be used to manage the product components and the component links. 1. Quick Quickly ly analyze analyze the broken broken links. links. 2. Load / Unload Unload individual individual component components. s. 3. Activ Activate ate / Deactivate Deactivate component components. s. 4. Isola Isolate te compon components. ents. 5. Replac Replace e compo components. nents. The Generate CATPart from the Product tool is used to create a non-associative CATPart file showing all active assembly nodes. The individual components are replaced by solid features.

CATProduct CAT Product fi le CATPart f ile generate CATPart generated d from the CATProduct.


139


Crea reate te Flexible Flexible Sub- Assemblies A flexible sub-assembly is a sub-assembly whose child components can be moved without affecting either the child components of other instances of the same sub-assembly or referenced CATProduct of the sub-assembly. In the example shown, by making each leg sub-assembly flexible, each leg can be have a different configuration.

Flexible sub-assembly is indicated by purple gear in the specification tree.

If a change is made to a flexible sub-assembly and the same change needs to be made on the rigid instances of the same referenced assembly, the Propagate position to reference option must be used.

Create Scenes Scenes enable you to capture assembly configurations without modifying the root product. You can do the following: 1. Change the the Hide/Show Hide/Show state state of components. components. 2. Change the color color of compone components. nts.

Three different states of gear box assembly are represented.

3. Change the position position of compone components. nts. 4. Change the activation activation states states of representations. representations. 5. Create drafting drafting views views based on on scenes. A draw d raw in g view v iew is gener ated f ro rom m an exp explo lo ded vi ew.


140


An A n al aly y ze th t h e As A s s em emb bly The types of Analysis are as follows: 1.

Compon Comp onen entt cons constr trai aint nts s usin using g Anal Analyz yze e> Constraints.

2.

Rela Re lati tion onsh ship ips s be betw twee een n co comp mpon onen ents ts us usin ing g Analyze Dependencies.

3.

Degree Degr ees s of of fre freed edom om us usin ing g Ana Analy lyze ze > Degree(s) of freedom.

4.

Mini Mi nimu mum m dist distan ance ce bet betwe ween en com compo pone nent nts, s, products and groups of documents using Distance and Band Analysis tool.

1 2

3

4

5.

Asse As semb mbly ly Se Sect ctio ions ns us usin ing g the the Se Sect ctio ion n pla plane ne..

6.

Clas Cl ash, h, in inte terf rfer eren ence ce,, and and cl clea eara ranc nce e in in the the assembly using the Clash and Interference analysis tools.


5

6

141


Crea reate te Annotation Anno tation s Annotations are added to assembly documents to provide additional information about a part or product. For example, a brief description of the part, the material used for the part, the finish or the hardness requirements. You can add three types of annotations: A.

Weld Feature: Adds weld symbols and annotations.

B.

Text Te xt wi with th lea leade der: r: Add Adds s a bri brief ef des descr crip ipti tion on of of the part.

C.

Flag Fl ag not note e with with lea leade der: r: Add Adds s link links s to ext exter erna nall documents and/or URLs, such as a link to a presentation or a specification document.

Generate Ge nerate Repo Report rts s Two types of reports can be generated: A.

B.

Bill Of Material: It lists all the assembly components as well as information such as quantity, type and description.

Bill of Material

List Li stin ing g Rep Repor ort: t: It li list sts s all all th the e ass assem embl bly y components. They are displayed in a hierarchical format. Listing Re Report port


142


Main Ma in Tool Tools s (1/2) (1/2) Manipulating Product Structure 1

File > Desk: Opens a window that displays a tree with a product and child documents.

2

Edit > Links: Displays the linked components of the CATProduct / CATPart / CATDrawing.

3

Generate CATPa Generate CATPart rt fr om Prod uct : Creates a CATPart from the CATProduct. 1

Constraints Toolbar 4

Flexible/Rigid Sub-Assembly: Toggles the sub-assembly between flexible and rigid states.

Scenes Toolbar 5

Enhanced Scenes: Creates a Scene.

6

Scenes Browser: Browses existing scenes.

Annotations Toolbar 7

Weld Feature: Creates a weld feature.

8

Text Te xt wi th Leader: Creates a text with leader.

9

Flag Note with L ea eader: der: Creates a flag note with leader.

2

3

4

5

6

7 8

9


143


Main Ma in Tool Tools s (2/2) (2/2) Analysis Tools 5

An aly ze > Con st rai nt s: s: Analyzes Analyzes the constraints of an active product. 5

6

An aly ze > Degr ees o f Fr eedo m: m: Analyzes Analyzes the degrees of freedom of the active product.

7

An aly ze > Depen den ci es: Displays relationships between components and constraints.

8

An aly ze > Mech ani cal Str uc tu re: re: Analyzes Analyzes the Mechanical Structure of the product.

9

10

11

12

6 7

Compute Clash: Computes clash/contact between two selected components. Clash: Analyzes interference between the Clash: Analyzes products. Sectioning: Creates a section using a section plane. Distance and and B and Analysis: Computes minimum distance between selected components and also performs a distance band analysis.


8 9

10 11 12

144


Exercis xercise e: Flexibl lexible e Sub-Ass Sub-Asse embl mbly y Recap Exercise 20 min

In this exercise, you w ill c rea reate te flexible sub-assemblies with in th e top level assembly. assembly.


Create Crea te flexibl e sub-assemblies



Manipulate flexible sub-assemblies


145


Do it Your Yourself self (1 (1/1 /11) 1) 1. Ope pen n a produ product ct file file. •

The pro produc ductt fil file e has has a base base com compon ponent ent tha thatt is is fixed.

1a

a. Open Arms Arms.CAT .CATProdu Product. ct.

2. Asse Assemble mble a subsub-asse ssembly. mbly. •

Apply App ly cons constra traint ints s to ass assemb emble le the the subsub-ass assemb embly. ly.

a. Assem Assemble ble Links.CA Links.CATProd TProduct. uct. b. Apply a coincidence coincidence constraint constraint between between the reference planes.

2a

2b


146


Do it Your Yourself self (2 (2/1 /11) 1) 3. Add con constr stra aint ints. s. 

Add a contact constraint.The constraint.The updated assembly appears as shown below

3


147


Do it Your Yourself self (3 (3/1 /11) 1) 4. Assemble Assemble a second instance of a subassembly. •

Both Bot h subsub-ass assemb emblilies es are rig rigid id by def defaul ault. t.

a. Assemb Assemble le Arms.CAT Arms.CATPro Produc ductt as shown below.

4a


148


Do it Your Yourself self (4 (4/1 /11) 1) 5. Modify a subsub-a asse ssembly. mbly. •

You wil willl modi modify fy a rigi rigid d subsub-ass assemb embly, ly, bot both h instances will be affected.

a. Modify Modify the 90 value value of (Links.1) (Links.1) instance instance to 45deg.

5a


149


Do it Your Yourself self (5 (5/1 /11) 1) 6. Upda pdate te the asse ssembly. mbly. •

Modificat Modifi cation ions s are are sha shared red bet betwee ween n rigi rigid d subsubassemblies.

a. Select Select the update update icon. The The assembly assembly updates as shown below.


6a

150


Do it Your Yourself self (6 (6/1 /11) 1) 7. Modify a rigid subsub-a asse ssembly. mbly. •

Modifi Modi fica cati tion ons s to any any ins insta tanc nce e of rig rigid id sub-assemblies sub-assemb lies affect all instances of that sub-assembly.

a. Modify Modify the 120 120 dimension dimension of of (Links.2) sub-assembly to 90deg. b. Updat Update e the the assem assembly. bly. 7a

7b


151


Do it Your Yourself self (7 (7/1 /11) 1) 8. Ma Make ke a subsub-asse assembly mbly flexible. flexible. •

You wil You willl mak make e one one of th the e two two Links sub-assemblies flexible.

a. Select Select Links Links (Links.2 (Links.2)) subassembly from the specification tree. b. Sele Select ct the the Flexible/Rigid Sub-Assembly from the contextual menu. 8a

c. The subsub-ass assemb embly ly is now flexible, as indicated by the symbol in the specification tree.

8b

8c


152


Do it Your Yourself self (8 (8/1 /11) 1) 9. Modify a flexible sub-a sub-assembly ssembly.. •

Changes Change s made made to a fle flexi xible ble su sub-a b-ass ssem embly bly wil willl not not propagate to a rigid instance.

a. Modify Modify the 90deg dimension dimension of (Links. (Links.2) 2) flexible instance to 130deg. b. The updated updated assembly assembly appears appears as as shown below.

9a

9b


153


Do it Your Yourself self (9 (9/1 /11) 1) 10.. Modify a f lexible sub-assembly. 10 sub-assembly. •

Changes Change s made made to a fle flexi xible ble su sub-a b-ass ssem embly bly wil willl not not propagate to a rigid instance.

a. Modify Modify the 45deg dimension dimension of (Links. (Links.2) 2) flexible instance to 10deg. b. The updated updated assembly assembly appears appears as as shown below.

10a

10b


154


Do it Yourself (10/11) 11.. Propa 11 Propagate gate positio n to refe reference. rence. •

Although Althou gh the ri rigid gid ins instan tance ce doe doesn’ sn’tt upd update ate position with the flexible instance, you can propagate the position to the rigid instance.

a. Select Select the flexible flexible sub-assem sub-assembly bly (Links.2). b. Cl Clic ick k Propagate posit ion to r efe eference rence.. 11a c. The rigid rigid (referen (reference) ce) sub-assem sub-assembly bly updates to reflect the position of the flexible instance.

11b

11c


155


Do it Yourself (11/11) 12.. Update the assembl 12 assembl y. •

12a

The pro propag pagati ation on to to posi positio tion n from from a fle flexi xible ble sub sub-assembly to a rigid reference sub-assembly is temporary.

a. Selec Selectt the the Update Update icon. icon. b. The rigid rigid sub-assembly sub-assembly returns returns to the reference position.

12b

c. Save the the assembly assembly and close close the the file. file.


156


Exerci Exe rcise: se: Flexible Flexibl e Sub-Ass Sub-Asse embl mbly y Re Recap cap 

Create Crea te flexibl e sub-assemblies



Manipulate flexible sub-assemblies


157


Exerci xercise: se: De Desk and Flexible Flexib le Sub Sub--As Assembl sembly y Recap Exercise 20 min

In this exercise, you wil l use the Desk Desk com mand to r ena ename me a fil e. You wil l also cr ea eate te flexibl e sub-assemblies to achieve achieve positi onal requirements. By th e end end of t his exercise you wi ll be able to:  

Create Crea te flexibl e sub-assemblies An aly ze th e mec han ic al s tr uc tu re o f an ass emb ly


158


Do it Yours You rself elf (1/6) (1/6) 1. Ope pen n a produ product ct file file. •

This Th is as asse sem mbl bly y is is rig rigiid.

a. Ope Open n WheelA WheelArms rms.CA .CATPr TProdu oduct. ct.

1a

2. Re Rename name a file using the Desk Desk command. command. •

You will You will use use th the e Desk Desk co comm mman and d to re rena name me a part file.

a. Sel Select ect the rena rename me ico icon. n. b. Use the the Desk Desk comm command and to to rename rename WheelBase. Wheel Base.CATP CATPart art part to WheelBasePlate.CATPart

2a

2b


159


Do it Yours You rself elf (2/6) (2/6) 3. Analy Analyze ze the mecha mechanical nical structure structure.. •

The mech The mechan anic ical al str struc uctu ture re tha thatt you you will will analyze is for a rigid assembly.

a. Click An aly ze > Mechan ic al Structure. The mechanical structure is reported in the Mechanical Structure Tree.

3a


160


Do it Yours You rself elf (3/6) (3/6) 4. Ma Make ke changes changes to a subsub-asse assembly. mbly. •

By de defa faul ult, t, as asse semb mbli lies es ar are e rig rigid id..

a. Mod Modify ify the the 20deg 20deg dimensi dimension on to 35deg 35deg.. b. The upda updated ted assem assembly bly appea appears rs as shown shown below.

4a

4b


161


Do it Yours You rself elf (4/6) (4/6) 5. Ma Make ke a sub-a sub-assembly ssembly flexible flexible.. •

Think Th ink abo about ut the the hier hierarc archy hy of of the the sub-a sub-ass ssemb emblilies. es.

Make the appropriate sub-assembly flexible so that the 35deg dimension can be changed to 10deg without affecting the other instance of the sub-assembly.

5a


162


Do it Yours You rself elf (5/6) (5/6) 6. Ma Make ke a subsub-asse assembly mbly flexible. flexible. •

Think Thi nk abou aboutt the the hiera hierarch rchy y of the su sub-a b-ass ssemb emblilies. es.

a. Make the appropr appropriate iate sub-ass sub-assembli emblies es flexible flexible so that the dimensions can be changed to create the positions shown below.

6a

6a

6a


163


Do it Yours You rself elf (6/6) (6/6) 7. Analy Analyze ze the mecha mechanical nical structure structure.. •

The mec The mecha hani nica call str struc uctu ture re th that at yo you u will analyze is for a flexible assembly. Notice how different it is to the mechanical analysis reported when the assembly was rigid.

a. The mec mechan hanica icall struc structur ture e is reported in the Mechanical Structure Tree.

7a


164


Exercise: Desk and Flexible Sub-Assembly Recap  

Create Crea te flexibl e sub-assemblies An aly ze th e mec han ic al struct ure of an assembly assembly


165


Case Stu Study dy:: Ass A sse emb mbly ly Manage nagement ment Recap Exercise 40 min

In this exercise, you wil l create the case study mo del. Reca Recall ll t he design in tent of this model: 

You must be familiar with associated files



Modify the position of a sub-assembly without affecting other instances



Check for interference



Define an exploded state and save it for future use

 Add

textual information

Using the techniq ues you have learned learned in this and p revious l essons, create create the model without detailed detailed instruct ions.


166


Do It Yours elf: Ligh L ights ts (1 (1/8 /8)) You must complete the follow ing tasks: 1. Ope pen n exis existin ting g produc productt file file. • Open Full Full_Ass _Assembl embly_li y_light.C ght.CATPr ATProduc oduct. t. 1

2. Vie iew w pro produ duct ct li link nks. s. • Use the Des Desk k comm command and to view view all associated files

2


167


Do It Yours elf: Ligh L ights ts (2 (2/8 /8)) You must compl ete the followi ng tasks (continued):

3. Define a fle flexible xible asse ssembly. mbly. • Make Make the the app appro ropr pria iate te sub sub-assemblies flexible. • You You mus mustt ach achie ieve ve th the e configuration shown below.


168


Do It Yours elf: Ligh L ights ts (3 (3/8 /8)) You must compl ete the followi ng tasks (continued): 4

4. Analyz Analyze e for Bill Bill of of Ma Mate teria riall (BOM). • An Anal aly yze BOM.

5. Save the ana nalys lysis. is. • Sav Save e the the analy analysis sis as a *.t *.txt xt file file..

5


169



6. Vie iew w the sa save ved d text text file file. • Op Open en Les Lesso son6 n6.t .txt xt..


170



7. Ana Analyz lyze e for inte interfe rfere rence nce.. • Analyz Analyze e for Cont Contac actt and Clas Clash h betwe between en all components.


171



8. Cre rea ate a sce scene ne.. • Create Create a Full over overload load mode scen scene e calle called d Exploded State. • Def Define ine Par Part5 t5 to be the the Fixed Fixed pro produc ductt


172



9. A pp pp ly ly a s ce cen e. e. • Apply Apply the the Explo Exploded ded Stat State e scene scene to the the assembly.


173



10.. Add annota 10 annotations. tions. • Ad Add d the the text text sh show own n bel below ow.. • The font font size size of of the tex textt must must be 7.00m 7.00mm m and it should always be parallel to the screen.

10


174


Case Stud Study: y: Ass Assembly embly Design Reca ecap p 

View associated files



Modify the position of a subassembly asse mbly wit hout affecting other inst ance ances s



Check Che ck for interfere interference nce



Defin e a Defin an n explo ded state and save it for future use



Ad d t ext ual in fo rm ati on


175


Contextual Design

7

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to:     

Clarify the display Create Contextual Parts Create Assembly-Level Features Manipulate the Contextual Components Save the Contextual Models

8 Hours


177


Case Ca se Stud y The case study for this lesson is the completion of an earphone model.

Design Intent 1. Contextual Contextual links links must be used to ensure ensure that the ear phone cover references the Housing. 2. Additional Additional components components may may be added to this this assembly depending on the model. To ensure that the oval cut intersects all components the cut must be created at the assembly level. 3. The assembly assembly must be saved saved to another another directory. directory. 4. Using the Send Send To Directory Directory option option you can be sure that all files associated with the assembly are copied to the required directory.

Using Projections Projections from Housing part, you will design the sketch profile for the Ear Phone cover.

Stages Sta ges in th the e Proc Process ess 1.

Clarify th the di display.

2.

Create co contextual pa parts.

3.

Crea Cr eate te as asse semb mbly ly fe feat atur ures es..

4.

Mani Ma nipu pula late te the the con conte text xtua uall comp compon onen ents ts..

5.

Save the model.


178


Clarify the Display CATIA performance can be improved for large assemblies while panning, zooming, updating and saving. The following tools are used:

1

1. Visualizati Visualization on mode: In this this mode only a light light CGR representation of the model is loaded. Powertrain Assembly

2. Hide: You can can hide components components to clarify clarify the display and see only desired components.

2

Visualization Mode 3

3. Deactivate Deactivate representation representations: s: Deactivating Deactivating representations improves performance by hiding the components and excluding them from Mass Property analysis. 4. Deactivate Deactivate components: components: It will remove remove the component from show and no show space, bill of Material.

Hiding Components

4

Deactivating De activating Re Representations presentations

5

5. Selective Selective load: load: Used to load the assembly assembly up to a required depth and manage progressive loading of assemblies.

Deactivating Components


Selectiv Sele ctiv e Load

179


Create Cre ate Con Context textual ual Part Parts s Contextual parts are parts that have their geometry driven by another component. There are various ways to create contextual parts:

The green gear gear and b lue chain indicates the object is the original i nstance of a part that is contextual. 1 Pin

1. Using External External Parameters Parameters:: Contextual Contextual links are created when the part uses a reference of parameters defined in another part. 2. Using External External References: References: Contextua Contextuall links are created when the part refers to geometrical elements from another part.

Housing

The pin radius is us ed as an external parameterr to create the paramete hole in the housing.

Housing 2

3. Using Assembly Assembly Features: Features: Contextual Contextual links are created when there are Assembly features (Assembly Split, Remove, Hole) in a part.

The hole from the pin support is used as an external reference to cr ea eate te the hole in t he base part. part.

The benefits of using Design in Context:

Base

1. Reuses existi existing ng geometry geometry.. 2. Reu Reuses ses paramet parameters ers.. 3. The contextual contextual part is automatica automatically lly updated updated when the geometry of the referenced part changes.


3 The pin is used to create an assembly remove feature in the pin supports and housing.

180


Create Cre ate Assembly Ass embly-Level -Level Fea Featu tures res Assembly features are features that are applied not only to a single part (from within the part design workbench) but to a set of several parts of an assembly.

1

2

3

The following Assembly features can be created: 1. Sp Spli litt 2. Ho Holle

Split: The two parts Hole: The hole feature are split by the surface. affects both the parts.

Pocket: The elliptical pocket feature affects both the parts.

3. Po Pock cket et 4. Add 5. Re Remo move ve

4

5

Ad d: The ell ip ti cal sh shaped aped body is adde added d to t he two parts.


Remove: The central hole Remove: is the result of removing a shaft feature from the two bodies.

181


Manipul anipulate ate the Contextual Compon ents Various operations can be done as follows: 1.

Isol Is olat ate: e: Th The e con conte text xtua uall lin links ks ar are e bro broke ken. n. Yo You u can choose to isolate individual or all elements in a contextual part.

2.

Delete Dele te:: If th the e orig origin inal al in inst stan ance ce of of a dri drive ven n part part is deleted a new original instance should be established. When a component that drives a contextual part is deleted, the option to delete the contextual components that are driven by the component is available.

3.

Save Sa ve:: Aft After er sa savi ving ng a dri drivi ving ng CA CATP TPar artt wi with th a new filename, filename, the driven driven CATParts CATParts and the parent CATProduc CATProductt must be saved because because of their reference to the CATPart. After saving a contextual contextual CATPart CATPart with a new filename, filename, the parent CATProdu CATProduct ct will need to be saved because of its reference to the driving CATPart. CATPar t. After saving saving a CATProduct CATProduct with a new filename, filename, the contextual contextual CATParts CATParts that were defined in context of the CATProduct will have to be saved because of the CATPart’s CATPar t’s refer reference ence to the CATProduct CATProduct

4.

Copy Co py:: Usi Using ng th the e Sen Send d to to > Di Dire rect ctor ory y too tool, l, yo you u can create create a copy of the CATProduct CATProduct along with all related components.


Isolated external r efere eferences nces appear appe ar with the broken li nk,

Creating a copy of CATProduct using Send to > Directory.

182


Main Ma in Tool Tools s (1/3) (1/3) Tools > Options Settings 1

Work with t he cache cache system: Activates system: Activates the visualization mode.

2

Do not activate default shapes on Open: Prevents loading the representation of the Components in the CATProduct when it is opened.

3

Keep link with sele Keep selected cted object: The object created with this option will keep the link with the original part/reference.

1

2

Representation Tools 4

5

6

Desig n Mode: Loads the component in the Desig design mode.

3

Visualization Mode: Loads the component in the visualization mode. Ac ti vat e Nod e: e: Activates Activates the shape representation of the component.

4 5

7

Deactivate Node: Displays relationships between components and constraints.

View Toolbar 8

6 7 8

Hide/Show: Hides/Shows the selected components.


183


Main Ma in Tool Tools s (2/3) (2/3) Activate / Deactivate Tools 9

Ac ti vat e / Deact iv ate Co mp on ent : Activates/Deactivates a selected component.

Product Structure Tools 10

Selectiv e Load: Manages the loading of subSelectiv products level by level.

Knowledge Toolbar 11

Formula: Creates formulae and parameters to incorporate design constraints.

9 10 11

Assembly Features 12

Split: Creates an assembly split feature.

13

Hole: Creates an assembly hole feature.

14

Pocket: Creates an assembly pocket feature. 12

15

Ad d: Creates an assembly add feature and adds the body to the selected parts.

13 14

16

Remove: Creates an assembly remove feature and subtracts the body from the selected parts.

15 16


184


Main Ma in Tool Tools s (3/3) (3/3) Manipulating Contextual Parts 17

18

Isolate: Isolates the part by removing contextual links.

17

Delete: Deletes the selected component.

18

Save Tools 19

Save As : Saves the component with a new Save name.

20

Send to > Directory: Creates copy of the component in selected directory.

19

20


185


Case Stu Study dy:: Conte Cont ext xtual ual De Desi sign gn Recap Exercise 40 min

In this exercise you wil l create the case stud y mod el. Re Recall call the design i ntent of this model: 

Contextual links must be used to ensure that changes to the referenced parts are reflected in the contextual part



Contextual links can only reference the housing component



The oval cut may need to intersect other component that have not yet been created

 Assembly

must be saved to another directory in its entirety

Using the techniq ues you have learnt learnt in th is and previou s lessons , create create the model with only high-level high-level instructi on.


186


Do It Yours elf: Ea Earp rpho hone ne (1/1 (1/11) 1) You must complete the follow ing tasks: 1. Ope pen n existin existing g product product file. file. • Ope Open n Earpho Earphone_ ne_sta start. rt.CA CATPr TProdu oduct. ct.

1

2. Cre rea ate a ne new w part. part. • Cre Create ate a new new par partt name named d 'Cov 'Cover er'. '.

3. Constra onstrain in the ne new w part. part. • Positi Position on the the new new part part using using ref refere erence nce elements of Housing component in order to center it on Bend_Point. • Create Create a coinci coinciden dence ce betwee between n 'Bend_P 'Bend_Poin oint' t' of Housing and XY plane of Cover. • Create Create a coi coinci nciden dence ce betwe between en YZ plan plane e of Housing and YZ plane of Cover. • Create Create a coi coinci nciden dence ce betwe between en ZX pla plane ne of Housing and ZX plane of Cover.


2

187


Do It Yours elf: Ea Earp rpho hone ne (2/1 (2/11) 1) You must compl ete the followi ng tasks (continued):

4. Unl nloa oad d compo compone nent nts. s. • Unload Unload the Speake Speaker, r, Rubber, Rubber, and and Flexib Flexible le components. 4

5. Sh ow ow a s ke ket ch ch . • In Housing Housing comp componen onentt show show 'Sketch. 'Sketch.3'. 3'.

6. Cre rea ate a ske sketch tch.. • Act Activa ivate te the Cove Coverr compon component ent.. • In Cover Cover compon component, ent, crea create te a new sket sketch ch lying on ZX plane.

5


188



6. Cre Create ate a sketch sketch (continued). (continued). • Project Project the the three three outli outlines nes of 'Sketch.3' in this new sketch. Make sure the link is kept with Housing Component. • Add geom geometry etry as shown shown on the the scheme and exit the sketcher.


189


Do It Yours elf: Ea Earp rpho hone ne (4/1 (4/11) 1) You must compl ete the followi ng tasks (continued): 7. Cre rea ate a sha shaft. ft. • Create Create a comp complet lete e Shaft Shaft aroun around d Z Axis Axis with with the sketch previousl previously y created.

7

8. Cre rea ate a pla plane ne.. • Create Create a new new plane plane defi defined ned with with an an offset offset of of 1mm from YZ plane. Reverse its direction if necessary.. This plane will be used to split necessary the shaft feature.

8


190



9. Cre rea ate a split. • Use this this plane plane to split split the curren currentt solid. solid. Keep the biggest part of the solid.

10.Create a fillet.

9

• Define Define an edge edge fillet fillet of Radius Radius 2.5mm 2.5mm on the two corners of the Cover.

10


191


Do It Yours elf: Ea Earp rpho hone ne (6/1 (6/11) 1) You must compl ete the followi ng tasks (continued): 11

11. Cre rea ate a gro groove ove.. •

Create Crea te a gr groo oove ve re reus usin ing g 'S 'Ske ketc tch. h.2' 2' (w (wit ith h link) from Housing component.

12. Hid ide e co comp mpon one ent nt.. •

Hide Hi de the Hous usin ing g com comp pon onen entt fo for cl clar ariity ty..

13. Cre rea ate a fil fille lets. ts. •

Create tw two ed edge fifillets of of 5m 5mm to smooth the edges left by the groove.

13


192



14.. Cre 14 Create ate a tritangent fillet. •

Create a trita Create tritange ngent nt fill fillet et to to remov remove e the planar face.

14


193


Do It Yours elf: Ea Earp rpho hone ne (8/1 (8/11) 1) You must complete the follow ing tasks (contin ued) ued):: 15

15.. Cre 15 Create ate an asse assembly mbly level level pocket. pocket. •

Reuse Reus e Ske Sketc tch. h.8 8 fro from m the the Ho Hous usin ing g component to create a Pocket at the assembly level that cuts through the Cover component. Use the Up to Last depth option.

16. Cre rea ate a fille fillet. t. •

Acti Ac tiva vate te th the e Co Cove verr co comp mpon onen ent. t.

•

Fillet Fill et the the in inne nerr fac face e of of the the po pock cket et (Radius = 0.2mm).

16


194


Do It Yours elf: Ea Earp rpho hone ne (9/1 (9/11) 1) You must complete the follow ing tasks (continued): 17

17. Cre rea ate a ske sketch tch.. • Create Create a new sket sketch ch as as shown. shown. Use the ZX plane as the sketch support.

18. Cre rea ate a poc pocke ket. t. • Create Create a pocket pocket using using the the Up to Last Last limit limit type for both the first and second limits.

19

19. Cre rea ate a pa patte ttern. rn. • Create Create a rectangul rectangular ar pattern pattern to duplica duplicate te the pocket.

20. Cre rea ate fill fille ets. • Fil Fillet let both both pockets pockets (Radi (Radius us 0.1mm) 0.1mm)

20


195


Do It Yourself Your self:: Earphon Earph one e (10 (10/1 /11) 1) You must complete the follow ing tasks (continued): 21. Ad Add d colo colorr to the the pa part rt.. •

You can app pplly the mate terria iall of yo your ur choice (Painting for instance) on Cover component.

22. Disp ispla lay y all all compon compone ents nts.. •

Sho how w th the e Ho Hous usin ing g co com mpo pone nen nt an and d Loa oad d the Speaker, Rubber, and Flexible components.

20


196


Do It Yourself Your self:: Earphon Earph one e (11 (11/1 /11) 1) You must complete the follow ing tasks (continued):

23

23. Ver if if y l in in ks ks •

Ens nsur ure e th that onl only y the the Cove verr co comp mpo onen entt has external links to the housing component.

24. Save the asse ssembl mbly. y. 25

25. Send the asse ssembly mbly to anothe anotherr directory. •

Create a new folder called Earphone_Complete Earphone_Com plete and save the entire assembly to this directory.


197


Case Ca se Stu Study dy:: Contextu Cont extual al Desig Design n Recap Recap 

Unload Unloa d comp onents



Create Crea te part in co ntext



Hide components



Create an assembly level Create pocket



Load components



Show components



Save the entire assembly to Save another directory using the Send Se nd To com mand


198


Comp omplex lex Assembly Desi sign gn

8

Learnin Lea rnin g Objectives Upon completion of this lesson y ou will be able able to:    

Stages in the Process Create a Skeleton Model Create the Published Elements Use the Published Elements

4 Hours


199


Case Ca se Stud y The case study for this lesson is a skateboard assembly.

Design Intent Skeleton part

1. Component Component locations locations must be controlled controlled from a centralized location using the skeleton method. 2. Support Support geometry geometry must update update in all all components using the skeleton approach. 3. References References must be strictly strictly controlled. controlled. Using Using published geometry, only published elements are allowed for selection when creating external references and assembly constraints.

Stages Sta ges in th the e Proc Process ess 1. Create a Skeleton Skeleton model. model. 2. Create publi published shed elements elements.. 3. Use the publi published shed element elements. s. Skateboard design using skeleton approach.


200


Create Cre ate the Skeleton Model The skeleton method is a top down design approach used to create and reuse information stored in a single part to define the underlying design framework of components and assemblies. It has the following advantages: 1. Specificati Specification-dri on-driven ven design: All important information related to the design and space requirements are defined within the skeleton. 2. Design Design change propagatio propagation: n: It helps manage high-level design changes and propagate them throughout the assembly. 3. Collaborati Collaborative ve design: Key informatio information n stored in the skeleton model can be associatively copied into the appropriate components used in the product. The components can then be edited separately by different designers.

Skeleton

4. Avoids update update loops: loops: All are external external references point to a single source: the skeleton. Since the skeleton model does not use any external references to define its geometry update loops are avoided.

Skateboard design using skeleton approach.


201


Create Published Geometry Publishing geometrical elements is the process by which geometrical features are made available to different users. It is most applicable to the geometry and parameters of a skeleton model. It has the following benefits: A. Label geometry to give it a name that can be easily recognized (particularly in the case of publishing edges, faces, etc.). B. To make particular particular geometry easier easier to access from the specification tree. C. Control external references. An option is available that lets you to select as external reference only ( For the published elements).

Use Publications Publications for c rea reating ting assembly asse mbly constraints

D. Easy replacement of one feature of the part with another.

Use Published Geometry Published geometry is particularly useful when replacing components with assembly constraints or components with external links that have been designed in context.


Use Publications Publications i n contextual design

202


Main Tools Publications 1

Tools > Publication: Creates publications of the selected element.

1

Tools > Options Part Workbench 2

3

As sem bl y Co ns tr ain ts : You can choose to select options for using publications while creating assembly constraints.

Assemb As semb ly Wor Workb kb enc ench h

External Re References: ferences: You can choose options while creating external references.

2

3


203


Exercis xercise e: Skele keleton ton and Desig sign n in Cont onte ext Recap Exercise 90 min

In this exercis exercis e, you wi ll use the tools learnt in th e present present and previous lessons t o create an assembly assembly u sing the skeleton method. You will use a skeleton mod el to control a rod and and a piston assembly, by referring referring to its geometry to positio n comp onents and design in cont ext. High-leve High-levell inst ruct ions fo r this exercise are provided.


Use the skeleton method



Design a part in co ntext using the skeleton Design skeleton mo del for external references



Constrain an assembly assembly using a skeleton skeleton m odel


204


Do it Your Yourself self (1 (1/1 /14) 4) 1. Cre rea ate a ne new w product product file file.. • Name Name the the pro produ duct ct [Piston_with_Skeleton].

1 2

2. Cre Create ate Sk Skele eleton.C ton.CATP ATPart. art. • Create Create a new new compone component nt inside inside the assembly called [Skeleton.CATPart]. 3. Fix the the ske skele leton ton mode modell in the assembly.

4

4. Cre rea ate use userr para parame mete ters rs • Activate Activate the skele skeleton ton compon component ent and create the five user parameters shown. • Create Create the the new new parame parameter ters s of type Length.


3

205


Do it Your Yourself self (2 (2/1 /14) 4) 5. •

Cre rea ate addi dditio tiona nall skele skeleton ton ge geome ometry try.. The ma The main in di dime mens nsiion ons s of a mo mode dell ca can n be expressed not only with user parameters but also with geometry (planes, axis, points, etc.) a.

Create Crea te a poi point nt to lo loca cate te th the e ori origi gin n of of the part.

b.

Create Crea te fi five ve pl plan anes es an and d ren renam ame e the them m as shown: i.

Pin_Width = [3 [35mm] of offset fr from th the YZ plane

ii.. ii

Pis isto ton_ n_In Inn ner_ r_F Fac ace e = [15m [15mm m] offs offse et from the YZ plane

iii. ii i.

Rod_Pi Rod_ Pin_ n_Co Conn nnec ecto tor_ r_Wi Widt dth h = [1 [1mm mm]] offset from the Piston_Inner_ Piston_Inner_face face

iv.. iv

Rod_Cr Rod_ Cran anks ksha haft ft_H _Hig ighe hest st_W _Wid idth th = [12mm] from the YZ plane.

v.

Rod od_ _Cr Cran ank ksha haft ft_L _Low owe est_ t_W Widt dth h= [10mm] offset from the YZ plane.

5b i

5b i i i

5bii

5b i v


5a

5b v

206


Do it Your Yourself self (3 (3/1 /14) 4) 6.

Cr eat e a l i n e. •

•

7.

Create a line named [Rod_Main_Axis] using the following references: a.

Typ Ty pe: Ang ngle le//No Norm rmal al to cu curv rve e

b.

Curve: Z Axis

c.

Support: YZ plane

d.

Point: Origin

e.

Angle: 10deg.

f.

Start: 0mm

g.

End: Cr End: Crea eate te a for formu mula la eq equa uall to to the the [Rod_Length] parameter.

6

This li This line ne re repr pres esen ents ts th the e dir direc ecti tion on of th the e rod.

Cr eat e a p o i n t . •

Create a point at the end of the Rod_Main_Axis.

•

Name the point [Rod_Crankshaft_Middle_Point].


7

207


Do it Your Yourself self (4 (4/1 /14) 4) 8.

9.

Cr eat e a p l an e. •

Create a plane normal to the Rod_Main_Ax Rod_M ain_Axis is and through through the Rod_Crankshaft_Middle_Point.

•

Rename the point to [Rod_Crankshaft_Middle_Plane]

Cr eat e a p o i n t . •

Create a point called [Fixation_Center_Point] using the following reference: a.

Type: On plane

b.

Plane: Rod_Crankshaft_Middle_Plane

c.

H=0

d.

V = Fro From m th the e con conte text xtua uall me menu Edit Formula to be [Crankshaft [Cran kshaft_Diam _Diameter eter / 2 + Fixations_ Fixat ions_Diamet Diameter er / 2 + 5mm]


8 9

208


Do it Your Yourself self (5 (5/1 /14) 4) 10. Cre rea ate a line line.. •

Creatte a li Crea line ne ca callle led d [Fi [Fixa xati tion on_A _Axi xis s] using the following references. a.

Type: Point-D -Diirect ctiion

b.

Poin Po int: t: Fi Fixa xati tion on_C _Cen ente ter_ r_Po Poin intt

c.

Direct ctiion: Rod Rod_Mai ain n_Axis

d.

Support: YZ plane

e.

End: 25mm

f.

Sele Se lect ct the Mirr rro ore red d Ext Exten entt opt optio ion n

10


209


Do it Your Yourself self (6 (6/1 /14) 4) 11. Inse nsert rt an an existin existing g compone component. nt. • Insert th the Ro Rod.CATPart. • Use the following coincidence constraints to place the component: a. b. c.

11

Rod_Cr Rod_ Cran anks ksh haf aftt_M _Mid iddl dle_ e_Pl Plan ane e of skeleton with XY plane of Rod. Rod_ Ro d_Cr Cran anks ksha haft ft_M _Mid iddl dle_ e_P Poi oin nt of skeleton with ZX plane of Rod. YZ pl plan ane e of of ske skele leto ton n wit with h YZ YZ pla plane ne of Rod.

12. Inse nsert rt an an existin existing g compone component. nt. • Insert the Connector.CATPart into the assembly. • Use the following coincidence constraints to place the component: a.

b.

c.

Rod_Cr Rod_ Cran anks ksh haf aftt_M _Mid iddl dle_ e_Pl Plan ane e of skeleton with XY plane of Connector. Rod_ Ro d_Cr Cran anks ksha haft ft_M _Mid iddl dle_ e_P Poi oin nt of skeleton with ZX plane of Connector. YZ pl plan ane e of of ske skele leto ton n wit with h YZ YZ pla plane ne of Connector.


12

210


Do it Your Yourself self (7 (7/1 /14) 4) 13. Inse nsert rt an an existin existing g compone component. nt. •

Insert the Piston.CATPart into the assembly.

•

Use the following coincidence constraints to place the component: a.

XY pl plan ane e of th the e sk skel elet eton on wi with th XY plane of the Piston.

b.

YZ pl plan ane e of of th the e sk skel elet eton on wi with th YZ plane of the Piston.

c.

ZX pl plan ane e of of the the sk skel ele eto ton n wit with h ZX ZX plane of the Piston.


13

211


Do it Your Yourself self (8 (8/1 /14) 4) 14. Link the Rod compone component nt para parame mete ters. rs. •

Activa Acti vate te the the rod rod com compo pone nent nt and and lin link k the the rod’ rod’s s user user par param amet eter ers s to to the the skeleton’s corresponding user parameters: a.

Pin_ Pi n_Di Diam amet eter er = [Pi [Pin_ n_Ex Exte tern rnal al_D _Dia iame mete ter] r] of sk skel elet eton on..

b.

Cran Cr anks ksha haft ft_D _Dia iame mete terr = [Cra [Crank nksh shaf aft_ t_Di Diam amet eter er]] of skel skelet eton on..

c.

Fixa Fi xati tions ons_D _Dia iame mete terr = [Fi [Fixa xati tion ons_D s_Dia iame mete ter] r] of ske skele leto ton. n.

14


212


Do it Your Yourself self (9 (9/1 /14) 4) 15.. Re 15 Replace place geome geometrical trical ele elements. ments. •

From th the ge geometrical se set, re replace: a.

[Pin [P in_G _Gri rip_ p_Ce Cent nter er]] by by [Or [Orig igin in]] of of ske skele leto ton. n.

b.

[Conne [Con nect ctor or_T _Thi hick ckne ness ss1] 1] by [Rod_Crankshaft_Lowest_Width] of skeleton.

c.

[Con [C onne nect ctor or_T _Thi hick ckne ness ss2] 2] by [Rod_Crankshaft_Highest_Width] of skeleton.

d.

[Pin_ [Pi n_G Gri rip_ p_T Thi hick ckne ness ss]] by [Rod_Pin_Connector_Width] of skeleton.

e.

[Fixat [Fix atio ion_ n_Cen Cente ter] r] by [Fix [Fixat atio ion_C n_Cen ente ter_ r_Po Poin int] t] of skeleton.


15

213


Do it Your Yourself self (1 (10/ 0/14 14)) 16. Link the the conne connector ctor pa para rame mete ters. rs. •

Acti tiv vat ate e th the con conn nect cto or co comp mpon onen entt an and link the connector's user parameters to the skeleton’s corresponding user parameters:

a.

Fixation_Diameter = [Fixation_Diameter] of skeleton.

b.

Crankshaft_Diameter = [Crankshaft_Diameter] of skeleton.

16

17.. Re 17 Replace place geome geometrical trical ele elements. ments. •

From th the e ge geomet etrric ical al set et,, repl plac ace: e:

a.

[Fixation_Ce Cen nter] by [Fixation_Center_Point] of skeleton.

b.

[Conne [Con nect ctor or_T _Thi hick ckne ness ss1] 1] by [Rod_Crankshaft_Lowest_Width] of skeleton.

c.

[Con [C onne nect cto or_ r_T Thi hick ckne ness ss2] 2] by [Rod_Crankshaft_Highest_Width] of the skeleton.


17

214


Do it Your Yourself self (1 (11/ 1/14 14)) 18. Link the pisto piston n para parame mete ters. rs. •

Acti tiv vat ate e th the pi pist ston on co com mpon onen entt an and lilink the piston's user parameters to the skeleton’s corresponding user parameters:

a.

18

Pis isto ton_ n_Ra Radi dius us = Pi Pist ston on_D _Diiam amet eter er /2.

19.. Re 19 Replace place geome geometrical trical ele elements. ments. •

From th the e ge geomet etrric ical al set et,, repl plac ace: e:

a. b.

[Left_ [Lef t_Fa Face ce_P _Pla lane ne]] by [P [Pin in_W _Wid idth th]] of skeleton. [Left_Inner_Plane] by by [Piston_Inner_Face] of skeleton.


19

215


Do it Your Yourself self (1 (12/ 2/14 14)) 20. Cre rea ate a ne new w part. part. •

Act ctiivat ate e th the e top op--leve vell ass ssem embl bly y.

•

Create a new pa part na named [P [Pin].

21. Pos osit itio ion n the the pi pin. n. •

•

Constr Cons trai ain n th the pin pin com omp pon onen entt us usin ing g th the following coincident constraints constraints..

a.

XY pl plan ane e of th the e sk skel elet eton on wi with th XY plane of the Pin.

b.

YZ pl plan ane e of of th the e sk skel elet eton on wi with th YZ plane of the Pin.

c.

ZX pl plan ane e of of the the sk skel ele eto ton n wit with h ZX ZX plane of the Pin. Update th the as assembly to to pl place th the component.


216


Do it Your Yourself self (1 (13/ 3/14 14)) 22. Cre rea ate pin pin geome geometry try.. •

Activa Acti vate te th the e pi pin n com compo pone nent nt an and d cre creat ate e th the e fo foll llow owin ing g contextual geometry.

a.

Act ctiiva vate te the pi pin n com compo pone nent nt..

b.

Crea Cr eate te th the e ske sketc tch h show shown n on on the the YZ pl plan ane. e.

c.

Create Crea te a for formu mula la to co cont ntro roll the the ex exte terna rnall rad radiu ius. s. Make the external radius equal to half of the [Pin_External_Diameter] defined in the skeleton.

d.

Create Crea te a pad pad fe feat atur ure. e. Cr Crea eate te th the e pad pad up to th the e [Pin_Width] plane.

e.

Create Crea te tw two o cham chamfe fers rs [1m [1mm/ m/45 45de deg] g] on on the the exte externa rnall face of the pin.

f.

Mirr Mi rror or th the e pin pin ge geom omet etry ry ab abou outt the the YX pl plan ane. e.


22b

R 10 f f(( x) 4

217


Do it Your Yourself self (1 (14/ 4/14 14)) 23. Edit spe specif cifica icatio tions. ns. •

Now that Now that all all th the e com compo pone nent nts s of of the the pr prod oduc uctt are are li link nked ed to th the e specifications specificati ons of the skeleton, we can change the general specifications specificati ons of the product just by editing the skeleton.

a. b.

Activa Acti vate te th the e sk skel elet eton on co comp mpon onen ent. t. Chan Ch ange ge th the e use userr pa para rame mete terr va valu lues es:: a. b. c. d. e.

c.

Piston Diameter = 80mm Pin_ n_E Exte terrnal al_ _Di Diam amet ete er = 18 18m mm Rod_Length = 130mm Crankshaft_Diameter = 45 45mm Fixations_Diameter = 6mm

23

Chan Ch ange ge th the e valu value e of of the the off offse sets ts fo forr the the fo foll llow owin ing g planes: a. b. c.

Pin_Width = 32mm Rod_ Ro d_Cr Cran anks ksha haft ft_H _Hig ighe hest st_W _Wid idth th = 10 10mm mm Rod Ro d_C _Crran ank ksha hafft_ t_Lo Low wes est_ t_W Widt dth h = 8mm

24. Upda pdate te the toptop-le leve vell assembly. assembly. •

Activa Acti vate te th the e top top-l -lev evel el as asse semb mbly ly an and d upd updat ate e it. it. No Noti tice ce th the e changes made to the skeleton propagate through the entire assembly.


24

218


Exerci Exe rcise: se: Skeleto Skeleton n and De Desig sign n in Cont ext Recap Recap 

Use the skeleton method



Design a part in context usi ng Design the skeleton model for exte external rnal references



Constrain an assembly assembly using a skeleton model


219


Exercis xercise e: Pub Public lica ati tion on Recap Exercise 20 min

In this exercise, exercise, you will op en an an existing assembly and replace replace one of its comp onents. To To ensure constraint r efe eferences rences are are not lost , you wi ll pub lis h elements elements in the replaced replaced and replacing replacing co mpon ents. High-leve High-levell inst ruct ions fo r this exercise are prov ided. By th e end end of t his exercise you wi ll be able to: 

Create Crea te publ ish ed elements elements



Replace components


220


Do it Yours You rself elf (1/4) (1/4) 1.

Ope pen n CR CRIC_SCREW1.CAT ATP Part.

2.

Pu bl bl is is h t he he ax is is as as sh sh ow ow n. n.

3.

Pu bl bl is is h t he he f ac ac e as sh sh ow ow n. n.

2

3


221



Ope pen n CRIC_SCREW2.CAT ATP Part.

5.

Pu bl bl is is h t he he ax is is as as sh sh ow ow n. n.

6.

Pu bl bl is is h t he he f ac ac e as sh sh ow ow n. n.

5

6


222



Clic lick k Tool Tools s > Opti ptions ons > Mecha chanic nica al Desig n > Ass embly Design. From the Desig Constraints tab set the Constraints creation option to Use published geometry of any level. level .

8.

Ope pen n Cric CricF First irstAss Asse embl mbly. y.C CAT ATP Prod roduct uct..

9.

Expa xpand nd the the CRIC_BR BRAN ANC CH1 component. Notice Notice that two of i ts elements are already published.

7

9


223


Do it Yours You rself elf (4/4) (4/4) 10.. Assemble CRIC 10 CRIC_S _SCR CREW EW1. 1.CAT CATPa Part rt using the publis hed geometry. geometry.

13

11. Cre rea ate a coincide coincident nt constra constraint int between the Axis and the BRANCH1_AXIS published elements. 12. Cre rea ate a surfa surface ce conta contact constraint constraint between the FACE and and the BRANCH1_FACE published elements. 13.

Up d at e the assembly.

14.. Replace 14 Replace CR CRIC IC_S _SCR CREW EW1. 1.CAT CATPa Part rt with CRIC_SCREW2.CATPART.

15

15.. Update 15 Update the asse assembly. mbly. Noti Notice ce the assembly asse mbly constr aints are automatically replaced because of the publications. 16. Save and and close the asse ssembly mbly and and all associated files.


224


Exerci Exe rcise: se: Publi cation Re Recap cap 

Create Cre ate publi cations



Replace components


225


Case Stu Study: dy: Com omplex plex Ass A sse embl mbly y Desi sign gn Recap Exercise 80 min

In this exercise, you wil l create the case study mo del. Reca Recall ll t he design in tent of this model: 

Component locations must be controlled from a centralized location.



Support geometry must be defined contextually.



References must be strictly controlled.

Using the techniq ues you have learnt learnt in th is and previou s lessons , create create the model with only hi gh-le gh-level vel instruction.


226


Do It Yours elf: Ska Skatebo teboard ard (1/17 (1/17)) You must complete the follow ing tasks: 1.

2.

Ens nsur ure e th tha at the the op opti tion ons s are are se sett correctly. •

Set th the e Con Const stra rain intt Cre Creat atiion opt ptiion to Use Publis Publis hed Geometry Geometry of any l eve evell .

•

Set th the e Ext Exter erna nall Re Refe fere renc nces es op opttio ions ns as shown.

Cr ea eat e a n ew ew p ro ro du du ct ct f ilil e. e. •

3.

1

Name the product [Product_for_Support].

Ins nse ert Ske Skele leto ton. n.C CAT ATP Part rt.. •

Thi his s mod odel el has bee een n cr crea eate ted d fo forr yo you. u. Review the created geometry. Notice that the publications have already been created for you.

4.

Fix the the ske skele leton ton mod mode el in the asse ssembl mbly. y.

5.

Inse nsert rt a ne new w part part ca calle lled d [S [Supp upport ort]. ].

6.

Acti Ac tiva vate te th the e su supp ppor ortt com compo pone nent nt..


2 3 5

4

227


Do It Yours elf: Ska Skatebo teboard ard (2/17 (2/17)) You must complete the follow ing tasks (continued): 7.

8.

9.

Cr ea eat e a n ew po po in in t. t. •

Create a new point of of co coo ordinates [0,0,0].

•

Rena Re nam me th the po poin intt to to [S [Sup uppo port rt_O _Ori rigi gin] n]..

Pu b l i s h el em en t s •

Pub ubli lish sh the [Sup uppo port rt_ _Or Orig igin in]] po poin intt.

•

Publish the XY plane.

•

Publish the ZX plane.

7 8

Po si si ti ti on on t he he s up up po po rt rt . •

Pos osit itio ion n the the su sup ppo port rt in the pro rodu duct ct by creating the following coincidence constraints between the published elements in the support and those of the skeleton: a.

Support_Origin with Front_Support_Middle_Point.

b.

XY pla plane ne wi witth Sup Suppo port rt _P _Pla lan ne, choose the opposite orientation.

c.

ZX plane wi with ZX ZX plane.


9

228


Do It Yours elf: Ska Skatebo teboard ard (3/17 (3/17)) You must complete the follow ing tasks (continued):

11b 11

10. Ins nse ert a bo body dy.. •

Insert a new bo body in into th the Su Support component, name the body [Base].


Create the sketch shown on the XY plane. Ensure that all radii are equal.

•

Consttra Cons rain in the ou outs tsid ide e ra radi diu us sh show own n to the “first_Hole_Center” point from the skeleton model.

•

You ne need to to cr create on only th the to top le left quarter of the sketch, and mirror it twice to create the final sketched geometry.

12

12. Cre rea ate a pa pad. d. •

Use th the sk sket etc ch to to cr create a [3mm] pa pad.


229


Do It Yours elf: Ska Skatebo teboard ard (4/17 (4/17)) 17

You must complete the follow ing tasks (continued): Draft neutral face

13. A pp pp ly ly d ra raf t. t. •

Create Crea te a [2 [2de deg g] dr draf aftt on th the e si side des s of of the pad. Use the top surface as the neutral plane.

15 14

14.. Create 14 Create a [1mm] edge fillet on the upper face of the pad. 2 deg Draft angle

13

15. Cre rea ate a ho hole le •

Creatte a M6 thr Crea hrea eade dedd-ho hole le ce cent nter ered ed on the First_Hole_Cen First_Hole_Center ter point of skeleton.

16. Patte ttern rn the the hol hole e. •

Pattern the hole using the Fixation_Pattern publication from the skeleton to locate the instantiations.

17. Cre rea ate a cha chamfe mfer. r. •

Create a [1mm/45d 5de eg] ch chamfer on on the upper edge of the four holes.


230



19b

19a

19c

18. Cre rea ate a ne new w body body Create an another bo body in in th the Su Support 19d component called [Shock_support].

•

19. Cre rea ate the ske sketch tch.. •

Create the sketch shown on the ZX plane.

•

You wi will ne need to pr project fr from the skeleton model: a.

The Fr Front_Support_Axis

b.

The Th e Fr Fron ont_ t_S Sho hock ck_A _Abs bsor orbe ber_ r_ax axis is

c.

The Fro Front nt_S _Sho hock ck1_ 1_S Star artt_p _poi oint nt

d.

The Th e Fr Fron ont_ t_Ax Axle le_C _Con onne nect ctio ion_ n_po poin intt

20


Creatte a pad of ty Crea typ pe Mi Mirr rror ored ed ex extten entt dimension. Use a length of [10mm].


231


Do It Yours elf: Ska Skatebo teboard ard (6/17 (6/17)) You must complete the follow ing tasks (continued): 21. A pp pp ly ly d ra raf t. t. a.

Add a [3 Add [3de deg] g] dr draf aftt to to the the tw two o sid sides es of the draft.

b.

Use th Use the e to top p pl plan anar ar su surf rfac ace e as th the e neutral plane.

22. Cre rea ate a trita tritange ngent nt fillet. fillet. •

22

Crea Cr eatte a tri rittan ange gent nt fi fillle lett as sh show own. n. 21b

21a


232



24b


Create a new body in the Sup upp port component.

24a 24c

24. Cre rea ate the ske sketch tch.. •

Create the sketch shown on the ZX plane.

•

Create the sketch such that: a.

The an The angl gled ed li line ne is pe perp rpen endi dicu cula larr to the Front_Shock_Absorber_axis.

b.

The ver The verte tex x of of th the e hor horiz izon onta tall lin line e must be coincident with the Front_Shock1_Start_Point.

c.

The ve vertical liline mu must be be coincident with the base edge.

25


Create a pad fr from th the sk sketch or or ty type Mirrored Extend Dimension and of length [7mm].


233



26

26. A dd dd d ra raf t. t. •

Add dr draf aftt of [3 [3d deg eg]] to bo botth si side des s of the pad. Use the XY plane as the neutral plane.

27. Remo move ve th the e bod body. y. •

Remove the new body from the Shock_Supp Shock _Support ort body.

28c

28. Cre rea ate fil fille lets. ts. •

28b

Creatte th Crea thre ree e [1m [1mm m] edg edge e fil fille lets ts in the order shown.

27 28a


234


Do It Yours elf: Ska Skatebo teboard ard (9/17 (9/17)) You must complete the follow ing tasks (continued): 29


Create a sketch wi with abs abso olute ax axis definition on the ZX plane position the sketch as shown using the following references: a.

Orig Or igin in:: Fron Front_ t_Sh Shoc ock1 k1_S _Sta tart rt_P _Poi oint nt

b.

V Direction: Front_Shock_Absorber_Axis.

30. Cre rea ate a groove fe fea ature ture.. •

6

31

Create a gro roo ove fe feature using the sketch.

31. Ad Add d a ch cha amf mfe er. •

Add a [0. 0.5m 5mm m/45 45de deg] g] ch cham amffer to th the e edges of the groove.


235


Do It Your self self:: Skateboard Skatebo ard (10/1 (10/17) 7) You must complete the follow ing tasks (continued):

33


Create a new body in the Sup upp port component called Axle_Support. 6

33. Cre rea ate a sha shaft. ft. •

Create the sketch shown.

•

Use the following references to position it: a.

Pos osiiti tion one ed on th the e ZX pl plan ane e

b.

Origin: Front_Axle_Connection_Point

c.

34

V-direction: Front_Support_Axis

34. Split the body with with the XY pla plane ne..


236


Do It Your self self:: Skateboard Skatebo ard (11/1 (11/17) 7) You must complete the follow ing tasks (continued): 36

35. Cre rea ate a hol hole e. •

Create a [2mm] hole us using Up to Last option, centered on the Front_Axle Front _Axle_Conne _Connection_ ction_Point Point and in the direction of the Front_Support_Axis. 6

36. Cre rea ate a gro groove ove.. •

Cre rea ate a groove fe feature us using th the sketch shown. Position the same as the last sketch: a.

Positioned: ZX ZX pl plane

b.

Origin: Front_Axle_Connection_Point

c.

V-Di VDire rect ctio ion: n: Fr Fron ont_ t_Su Supp ppor ort_ t_Ax Axis is

37

37. Cre rea ate a fill fille et. •

App pplly a [1 [1m mm] ed edge fil ille lett to to the the to top p of of the shaft.


237



39 40

38. Add the thre three e pre previousl viously y designe designed d bodies in t he PartBody. PartBody. 39. Cre rea ate an edge edge fille fillet. t. •

Create a [1mm] edge fillet.

40. Cre rea ate an edge edge fille fillet. t. •

Create a [0.7mm] ed edge fifillet. 38


238


Do It Your self self:: Skateboard Skatebo ard (13/1 (13/17) 7) You must complete the follow ing tasks (continued): 41. Op en Skateboard_with_Skeleton.CATProduct. 42. Inse nsert rt Support. Support.C CAT ATP Part. •

If yo you u did did no nott co comp mple lete te th the e Su Supp ppor ort. t.CA CATP TPar artt from the previous steps, insert Support_Com Suppo rt_Complete plete.CAT .CATPart Part inste instead. ad.

43. Posi ositio tion n the suppo support rt compon compone ent. •

Use pub Use publi lish shed ed el elem emen entts fro from m the the su sup ppo port rt and the skeleton to constrain the support. a.

Support_Origin with Front_Support_Middle_Point.

b.

XY pl plan ane e with with Sup Suppo port rt_P _Pla lane ne,, oppo opposi site te direction.

c.

ZX pla lane ne wi witth ZX pl plan ane, e, sa sam me orientation.


43

239



44. Vali lida date te lin links ks.. •

From the support component's contextual menu, click Components > Define Contextual links. Ensure all links are in connected status and validate by selecting OK.

45. Inse nsert rt a ne new instance instance.. •

Ins nser ertt a new ins nsta tan nce of the Sup uppo port rt part and position it at the rear of the skateboard using the following coincidence constraints: a.

Support_Origin with Rear_Support_Middle_Point.

b.

XY pl plan ane e wit with Sup Suppo port rt_P _Pla lan ne, opposite direction.

c.

ZX pl plan ane e wi with th ZX pl plan ane, e, op oppo posi site te direction.


45

240


Do It Your self self:: Skateboard Skatebo ard (15/1 (15/17) 7) You must complete the follow ing tasks (continued): 46. Inse nsert rt scre screw w compone component. nt. •

Ins nser ertt ISO_ O_SC SCRE REW_ W_M M6x 6x10 10-Z -Z.C .CA ATPar art. t.

47. Pos osit itio ion n the sc scre rew. w. •

47a

Position th the sc screw by by cr creating th the following constraints between the published elements: a.

Coinci Coin cide denc nce e cons constr trai aint nt be betw twee een n the the Hole of the Support.1 and the axis of the Screw.

b.

Offse Off sett of [-3 -3m mm] be betw twe een Support_Pl Suppo rt_Plane ane in the skeleton skeleton and Mating_Pl Mati ng_Plane ane in the screw, opposite orientation.

48. Insta nstantia ntiate te the scre screw. w. •

Ins nsta tan nti tia ate the sc scre rew w by by reu reusi sing ng the us user er pattern created in Support component during the base conception. 49


241


Do It Your self self:: Skateboard Skatebo ard (16/1 (16/17) 7) You must complete the follow ing tasks (continued): 49. Edit the ske skele leton ton.. •

•

50

Change the coordinates of First_Hole First _Hole_Cente _Centerr point to: a.

H = 7.5mm.

b.

V = 20mm.

Notic Not ice e tha thatt all all the poi oint nts s of of the the fix ixat atio ion n pattern are recalculated accordingly.

49

50. Edit the ske skele leton ton.. •

Change the value of Length_betw Lengt h_between_Wh een_Wheel_Ax eel_Axis is to [500mm].

•

The whe The heel el ax axes es an and d fix ixat atio ion n ce cent nter er is moved.

51

51. Upda pdate te the the asse assembl mbly. y. •

Update the the assembly an and no notice th the support geometry has been recalculated and the screws have been repositioned.


242


Do It Your self self:: Skateboard Skatebo ard (17/1 (17/17) 7) You must complete the follow ing tasks (continued): 52. Edi ditt the sk ske ele leto ton. n. •

Change the angle of Front_Shook Front _Shook_Abso _Absorber_A rber_Axis xis from [34deg] to [27deg].

53

53. Edi ditt the sk ske ele leto ton. n. •

Change the angle of Front_Support_axis from [-3deg] to [-5deg].

52

54

54. Upda pdate te the asse ssembl mbly. y. •

Update the assembly and no nottice that the support's geometry has been recalculated again. Notice that the screws have been repositioned to meet the new design requirements.


243


Case Study: Complex As sembly Design Reca ecap p 

Design De sign in context using the skeleton skeleton method



Publish geometry



Position geometry using t he skeleton skeleton method



Propagate design changes


244


Mast ste er Pro roject ject Lifting Truck 4 Hours

The lifting truck h as double poles with a carriage carriage in which geome geometries tries and posi tion s are gui ded by skeleton. The The two forks are to be added for lift ing / handli ng material. The The forks are to be design design ed in the context of a skeleton so that they can be ea easil sil y modi fied in fut ure. A pneumatic jack wil l driv e the distance betwee between n th e two forks. You are provided with V4 data of the pneumatic pneumatic jack j ack . By the end of th is Project you wil l be able to: 

Reuse Re use V4 data and manage assembl assembl y co nst raints .



Modify rigid c omponent into fl exible to add add mechanical constraints.



Create knowledge parameters and 3D specifications in skeleton structures, and use external references.



Define a skeleton, Define skeleton, then design p arts in c ontext, and and mo dify p ara aramete meters rs to watch automatic geometry upd ate ates. s.



An aly ze th e ass emb ly to ch eck fo r c lear anc e, and an d m od if y g eom etr y by edi ti ng sk elet on specifications.


245


Master Project: Project: Lift ing Truck During this pro ject, you will follow seque sequential ntial steps from inserting specifications to mechanical mechanical analysis analysis th rough the design design o f compo nents in assembly assembly co ntext.


246


Master Project: Ove Overvi rview ew Double Pole designed for elevation

Carri age Carri age_S _Skeleton keleton wit h knowl edge and and geometric specifications for faster design modifications

Jack m ade in CATIA V4 with mobility and clearance guided by a skeleton (Steps 1 & 5) Lifting_Truck main body Forks fully designe designed d with external references references from skele skeletons tons (Steps 2, 3, 4) 4)


Plate with rails to support forks

247


Mast ste er Project Pro ject : Reus Reuse e the Exi Exist stin ing g V4 Jack Lifting Truck 30 min

The objective of this step is to asse assemble mble the jack and and to define para paramete meters rs in the parent pare nt skeleton that will co ntrol the mobility of the jack. High-le High-level vel instructio n for this exe exercise rcise is pr ovided.

By the end of thi s step, you will be able able to: •

Load a V4 V4 model of th e jack and save it as CATProduct CATProduct .

•

Insert this jack int o the correct sub-assembly Insert sub-assembly of Lift ing Truck.

•

Constrain components of th e jack. jack.

• • •

•

As sem bl e th e jac k o nt o t he s up po rt pl ate. Instantiate Instantia te bolts . Ad d g eom etr ic sp eci fi cat io ns dr iv en p aram eter s i n t he parent pare nt skeleton. Make Ma ke the jack flexib le.


248


Mast Ma ster er Project: Proj ect: Re Reus use e the Exist in ing g V4 Jack (1/4 (1/4)) Here He re is a list of required tasks to gui de you: 1. Op Open en th the e V4 V4 ass assem embl bly. y. • Ope Open n For Fork_Ja k_Jack_ ck_V4_ V4_Ste Step1. p1.ses sessio sion. n. • Save it loc local ally ly..

mobility

2. Add ass assemb embly ly con constr strain aints. ts. • Add Add constr constrain aints ts betw between een comp compone onents nts but but keep the degrees of freedom appropriate for the actual mobility of a jack.

mobility

• Avo Avoid id the Fix Tog Togeth ether er con constr strain aint. t.

Main Ma in Body grou p

Right Rod group

Left Rod group


249


Mast Ma ster er Project: Proj ect: Re Reus use e the Exist in ing g V4 Jack (2/4 (2/4)) Here is a list of required tasks to gui de you Here (continued): 3. Ope Open n the the top top-le -level vel ass assemb embly. ly. • Ope Open n Lifting Lifting_Tr _Truck uck_St _Step1 ep1.CA .CATP TProd roduct uct.. • Save it loc local ally ly..

4. In Inse sert rt the the jack jack compo compone nent nt.. • Inse Insert rt Fo Fork rk_J _Jac ack_ k_V4 V4 in into to Assembled_Carriage sub-assembly.

V4-Jack

• Add Add cons constra traint ints s usin using g plan planes es of Carriage_Skeleton, and existing holes of the main plate. • Instan Instantia tiate te two two bolts bolts and and constr constrain ain them them.. Use catalog bolt M8x30 or use the provided parts.

2 bolts

Main Ma in plate


250


Mast Ma ster er Project: Proj ect: Re Reus use e the Exist in ing g V4 Jack (3/4 (3/4)) Here is a list of required tasks to gui de you Here (continued): 5.

Add spec Add specif ific icat atio ions ns to to the the pare parent nt ske skele leto ton n that will be used to control the mobility of the jack.

C

A. Edit Carriage_Skeleton, which is in the Assembled_Carriage.CATProduct subassembly.

C

B. Add a paramete parameterr called between_forks_gap. C. Add two planes offset offset from the ZX plane to define the the forks’ posit positions ions along Yaxis. D. Publi Publish sh these new elements. elements. E. Drive the the plane offsets offsets by adding adding formulas between the parameter and planes offset values.

B

E


251


Mast Ma ster er Project: Proj ect: Re Reus use e the Exist in ing g V4 Jack (4/4 (4/4)) Here He re is a list of required tasks to gui de you (continued): 6.

Cons Co nstr trai ain n the the rods rods of of the the jack jack to to the the pare parent nt skeleton using a flexible sub-assembly. • Edit Edit Assemb Assembled led_Ca _Carri rriage age.CA .CATP TProd roduct uct.. • Ma Make ke V4 V4_J _Jac ack k fl flex exib ible le.. • Ad Add dc const onstrai raints nts bet betwee ween n the the rod rods’ s’ ext extrem remity ity axes and the new planes of Carriage_Skeleton.

7.

Chec Ch eck k th the e ass assem embl bly y by by mod modif ifyi ying ng th the e parameter. • Edit Edit Car Carria riage_ ge_Ske Skelet leton. on.CAT CATPar Part. t. • Cha Change nge the val value ue of bet betwee ween_f n_fork ork_ga _gap p fro from m 600mm to 650mm. • Edi Editt Ass Assemb embled led_Ca _Carri rriage age.CA .CATP TProdu roduct ct and update. Both the rods should follow the modification.

8.

Add Ad d rang range e val value ues s to th the e para parame mete ter. r. • Edit Edit Car Carria riage_ ge_Ske Skelet leton. on.CAT CATPar Part. t. • Ad Add d ran range ge value value to the the betw between een_fo _fork_ rk_gap gap parameter (min (min = 525mm ; max = 750mm).

9.

Save all.


252


Mast Ma ster er Pro Project ject:: Reus Reuse e th the e Exis Existi ting ng V4 Jack Recap Recap 

Load a V4 mod el of t he jack and save it as CATProduct



Insert thi s jack into the correct sub-assembly Insert sub-assembly of Lifting_Truck



Constrain components of th e jack jack

  



As sem bl e th e jac k o nt o t he s up po rt pl ate Instantiate Instantia te bolt s Ad d g eom etr ic sp eci fi cat io ns dr iv en parameters in the parent skeleton Make the jack flexible


253


Mast ste er Project: Prepa repari ring ng for Desi sign gn in Con ontext text Lifting Truck 60 min

The objecti ve of thi s step is to cr ea eate te a new new skeleton t o prepare the design design of th e forks i n the fol lowing steps. High-le High-level vel instructi ons fo r thi s exercise exercise are provided.


Insert Inse rt a skeleton in a new product in th e carriage asse assembly. mbly.

•

Constrain the new skeleton to th e parent parent sk ele eleton. ton.

•

Import the carriage carriage assembly assembly specifications from it s skeleton into t he new skeleton. skeleton.

•

Create Crea te know ledge parameters parameters in the new skeleton.

•

Ad d 3D g eom etr y i n t he n ew sk elet on us in g k no w led ge formulas.


254


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (1/8 (1/8)) Continue with the models used in step 1. If you did not complete step 1, use Lifting_Truck_Step2.CATProduct. Here He re is a list of required tasks to gui de you: 1. Insert Insert a new new sub-c sub-comp ompone onent nt in in preparation for design-in-context of the forks. • Loa Load d Assemb Assembled led_Ca _Carri rriage age.CA .CATPr TProdu oduct. ct. • Insert Insert a new new produ product ct with with a fixed fixed new new part (the skeleton) as shown in the specification tree. • Publis Publish h the the XY, XY, YZ, YZ, ZX ZX plane planes s of the skeleton. • Sav ave e all all lo loca callly ly..


255


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (2/8 (2/8)) Here is a list of required tasks to gui de you Here (continued): Before constraints:

2. You need to place the forks skeleton on the carriage skeleton before using external references for the design in context. Constrain the fork skeleton’s origin with respect to the Top Rail contact planes. • Edi Editt Assembl Assembled_C ed_Carr arriag iage.C e.CAT ATPro Product duct.. • Add con constr strain aints ts betw between een the for forks ks skeleton skelet on and Carria Carriage_Sk ge_Skeleto eleton n as shown. sho wn. The The forks forks skelet skeleton on wil willl be superimposed onto the parent skeleton.

• Save al all.


Af ter co ns tr ain ts :

256


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (3/8 (3/8)) Here is a list of required tasks to gu ide you Here (continued): 3. Import the external specifications into the forks skeleton.

a

• Copy Copy the the follo followin wing g speci specific ficati ations ons of Carriage_Skeleton: a. Pla Plane_ ne_Rig Right_ ht_For Fork_P k_Posi ositio tion n b. Pla Plane_ ne_Lef Left_F t_Fork ork_Po _Posit sition ion c. Pla Plane_ ne_For Fork_J k_Jack ack_He _Heigh ight_P t_Posi ositio tion n

b c

d. For Fork_R k_Rail ail_he _heigh ight_g t_gap ap par parame ameter ter • Paste Paste them them as as result result wit with h link link into into the forks skeleton. • Publis Publish h these these exter external nal feat feature ures s in the the forks skeleton.

• Save al all.


257


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (4/8 (4/8)) To help, here here is a list of required tasks (continued): 4. Identify the parameters that must be inserted in the forks skeleton. • Stud Study y the dimen dimensions sions of the the assembly. assembly. All All dimension dimensions s are in in mm. • Identify Identify the required required paramete parameters rs that you will will insert into into the forks forks skeleton. skeleton. You will will create the the required 3D geometry driven by those parameters.


258


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (5/8 (5/8)) To help, here here is a list of required tasks (continued): 5. Create the parameters in the forks skeleton. • Create Create the the follo followin wing g tree tree struct structure ure in in the forks skeleton.

a

a. External External param parameters eters conta contain in the imported parameter from Carriage_Skeleton.

b

b. Parame Parameter ters s contain contain all all the parameters you have to create. Publish them. c. Extern External al refere reference nces s contain contain the the geometric specifications imported from Carriage_Skeleton. d. You can can create create new new geomet geometric rical al sets in order to sort the geometric specifications you are about to create.

c

d

e. Do not forg forget et to publi publish sh all the the specifications you will create.


259


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (6/8 (6/8)) To help, here here is a list of required tasks (continued): 6. Create the forks skeleton’s 3D geometry.

B

A. In the geom_depth_specifications geom_depth_specifications geometric set, create four planes using the previously given 2D drawing and depth parameter. B. In the geom_rails_height_specifications geometric set, create seven planes using the previously given 2D drawing and the Rail_Height Rail_ Height exter external nal param parameter. eter.

Parts not Parts created crea ted yet. B

A

Fork_Rail_Height Fork_Rail_H eight + 2mm 2mm gap for spacing spacing betwe between en bottom bot tom ra rails ils


B

260


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (7/8 (7/8)) To help, here here is a list of required tasks (continued): 7.

Create Crea te the the for forks ks ske skele leto ton’ n’s s 3D geo geome metr try y (continued). C.

In the the geo geom_ m_wi widt dth_ h_sp spec ecif ific icat atio ions ns geometric set, create four planes using the previously given 2D drawing, width parameter, and imported planes.

D.

In the the geom_ geom_le leng ngth th_s _spe peci cifi fica cati tion ons s geometric set, create two planes using the previously given 2D drawing and parameters.

Fork Width

C

C

C

C

Fork Fo rk Le Length ngth D


261


Maste asterr Project: Proj ect: Preparing for Design in Cont ext (8/8 (8/8)) To help, here here is a list of required tasks (continued): 8. Create the forks skeleton’s 3D geometry (continued). • Upon comple completion tion of this this step step you you should should get get this this result result..

Width

Length


Rail Height

262


Maste asterr Project: Proj ect: Preparin Preparing g for f or Design in Context Cont ext Recap Recap 

Insert a skeleton in a new product in the Insert carriage assembly



Constrain the new skeleton to th e parent parent skeleton



Import the carriage assembly assembly sp ecifications from it s skeleton into the new skeleton skeleton



Create know ledge parameters Create parameters in the new skeleton



Ad d 3D g eom etr y i n t he n ew sk elet on us in g knowledge formulas


263


Mast ste er Project: Desi Design gn of o f Right Fork Ass Asse embl mbly y Lifting Truck 90 min

The objective of this step is to design the right fork assembly by using specifi cations of t he forks skeleton created created in pr evious step. High High -le -level vel instructio n for this exercise is provided.


Design De sign n ew parts in the context of the skeleton. skeleton.

•

Insert Inse rt additional compo nents.


264


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (1/6 (1/6)) Continue with the models used in step 2. If you did not complete step 2, use Lifting_Truck_Step3.CATProduct. B

Here He re is a list of required tasks to gui de you: 1. Crea Create te a new new pa part rt in Assembled_Forks.CATProduct.

A

A. Insert a new CATPart CATPart called Right_Fork. B. Publi Publish sh its planes. planes. C. Constrain it onto the forks forks skeleton to place it on the right side of fork assembly.

2. Use the the Part Part Desig Design n workbe workbench nch to to design design its shape with respect to the skeleton. A. Use a rib with two sketches to create the the profile.

C

B. Add a tritangent tritangent fillet and edge fillets. fillets. C. Apply a shell with a parameterized parameterized thickness.


265


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (2/6 (2/6)) Here is a list of required tasks to gui de you Here (continued): D. Add pockets pockets for for placing placing Fork_Plates Fork_Plates and Fork_Mobile_Axis.

D

E. Remove material to obtain the bottom slope.

F. Use the Part Part Design workbench workbench to design its shape with respect to the skeleton.

E

Right_Fork Origin

Oblong hole cente ce ntere red d onto Jack_Height plane


266


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (3/6 (3/6)) Here is a list of required tasks to gui de you Here (continued): 3.

4.

Desi De sign gn th the e mol molde ded d hoo hook k up up par part. t. As Assu sume me the design will not be associative with the product specification, and therefore does not require any external references. •

Insert a new CATPart called Hook_Up.CAT Hook_U p.CATPart Part in Assembled_Forks.CATProduct.. Assembled_Forks.CATProduct

•

Publish its planes.

•

Consttra Cons rain in it ont nto o the the sk ske ele letton to pla place ce it on the right side.

B A

A

B

Use the Use the Part Part De Desi sign gn wor workb kben ench ch to to desi design gn its shape. A.

Create pads.

B.

Crea Cr eatte dra draffts an and d fil filllet ets. s.

C.

Create cou counterb rbo ored holes.

D.

Create a pocket.


D C

267


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (4/6 (4/6)) Here is a list of required tasks to gui de you Here (continued): 4. Use the the Part Part Design Design workbench workbench to design design its shape (continued).


268


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (5/6 (5/6)) Here is a list of required tasks to gui de you Here (continued): 5.

Desi De sign gn th the e the the fo fork rk pl plat ate e in in the the co cont ntex extt of of the skeleton created in Step 2. • Inse Insert rt a new new CAT CATPa Part rt cal calle led d Fork_Plate Fork_ Plate.CAT .CATPart Part in Assembled_Forks.CATProduct.. Assembled_Forks.CATProduct • Pu Publ blis ish h its its pl plan anes es.. • Constr Constrain ain itit onto onto the the skelet skeleton on to pla place ce it on the right side.

6.

Use Us e the the Pa Part rt De Desi sign gn wo work rkbe benc nch h to to des desig ign n its shape with respect to the skeleton. • Create a pad. • Create Create hole holes. s. The The posit position ion of the the holes holes should not follow any parameter as those in in Hook_up Hook_up holes do not. not.


D

269


Maste asterr Project: Proj ect: Desig Design n of o f Right Righ t Fork Ass Assembly embly (6/6 (6/6)) Here is a list of required tasks to gui de you Here (continued): 7. Ass Assemb emble le the the remain remaining ing comp compone onents nts.. A. Insert a screw (M8x25 CHC from catalog, or use the provided one) and add constrain it to the existing parts. B. Repeat this this for the four screws. screws. C. Load Fork_Mobile_A Fork_Mobile_Axis. xis. D. Save itit locally. locally. E. Drag and drop it into Assembled_Fork. Assembled_Fork. F. Add constraint constraints s with respect to the the skeleton. G. Add two screws. screws. H. Copy/Paste Fork_Plate, Hook_Up, Hook_Up, and the four screws. I. Move Move these these comp compone onents nts and and add add constraints to place them onto the bottom notch of Right_Fork.

8. Save al all.


270


Maste asterr Project: De Desig sign n of Righ ightt Fork Assembly A ssembly Reca ecap p 

Design n ew parts in the context of the Design skeleton



Insert Inse rt addition al components


271


Mast ste er Project: Desi Design gn of o f Left Fork Ass A sse embl mbly y Lifting Truck 45 min

The objective of this step is to design the left fork using the PowerC PowerCopy opy too l from th e right fork. You will then instantiate instantiate other components and constrain them in the assembly. assembly. High-level High-level instru ctio n for thi s exercis exercis e is prov ided.


Insert Inse rt a new empty part and constrain it onto t he skeleton. skeleton.

•

Create Cre ate the right f ork’s geome geometry try PowerC PowerCopy. opy.

•

Use right f ork’s d esign PowerCopy PowerCopy in this n ew part part by changing some geometrical references. references.

•

Instantiate Insta ntiate all comp onents needed needed f or the assembly.

•

Modify Skeleton’s Skeleton’s para paramete meters rs and noti ce automatic geometry modifications.


272


Master Proj Proj ect: Desig Design n of o f Left L eft Fork A ssembly (1/ 1/3) 3) Continue with the models used in step 3. If you did not complete step 3, use Lifting_Truck_Step4.CATProduct. Here He re is a list of required tasks to gui de you: 1. Cre Create ate a new new part part in Asse Assembl mbled_ ed_For Forks. ks. • Ins Insert ert a new CATP CATPart art call called ed Left_ Left_For Fork. k. • Publish Publish its planes and constra constrain in it to the the forks forks skeleton skeleton on on the left side.

2. Cre Create ate a PowerC PowerCopy opy of of Right Right_Fo _Fork. rk. • Edit Edit Right_ Right_For Fork k and Powe PowerCo rCopy py all all element elements s of PartB PartBody ody (features and sketches) and Relations (formulas). • Sav Save e the the PowerC PowerCopy opy in in a new new local local catal catalog. og.

3. Use the the PowerCo PowerCopy py to desig design n the Left_ Left_For Fork. k. • Edit Edit Left_F Left_Fork ork and use use the the catalo catalog g browser browser to to instan instantia tiate te the PowerCopy. • Replace Replace the the external external refer references ences for the the width width and length length definitions. Select the same specifications for all other external references from the skeleton. • Va Vali lida date te.. Left Left_F _For ork k is now now cre creat ated ed..

4. Save al all.


273


Master Proj Proj ect: Desig Design n of o f Left L eft Fork A ssembly (2/ 2/3) 3) Here is a list of required tasks to gui de you Here (continued): 5. Instantiate Instantiate the element elements s required required for mechani mechanical cal assembly. assemb ly. Left_Fork Left_Fork must be exactly exactly like Right_Fork. • Instan Instantia tiate te the fol follow lowing ing in Assembled_Forks.CATProduct: Assembled_Forks.CATPro duct: •

2 Hook_Up

•

2 Fork_Plate

•

1 Fork_Mobile_Axis

•

6 Screws

• Ad Add d co cons nstr trai aint nts. s. • Save all. • Instan Instantia tiate te the fol follow lowing ing in Assembled_Carriage.CATProduct:: Assembled_Carriage.CATProduct •

2 wash washer ers s (M10 (M10), ), are are alr alrea eady dy exi exist stin ing g in the the local files

•

2 nuts (M10)

• Ad Add d co cons nstr trai aint nts. s. • Save all.


274


Master Proj Proj ect: Desig Design n of o f Left L eft Fork A ssembly (3/ 3/3) 3) Here is a list of required tasks to gui de you Here (continued): 6. Modify Modify the the paramet parameters ers in the the skele skeleton ton to check if the geometry is properly driven by the wireframe reference elements. • Note Note tha thatt Fork Fork_D _Dep epth th mu must st not not exc excee eed d Fork_Bottom_Angle_Radius. • Note Note that that Fork_B Fork_Bott ottom_ om_Ang Angle_ le_Rad Radius ius must not exceed 50mm as bottom rail position is not dependant of this parameter. • Do not not save save those those last last mod modifi ificat cation ions. s.


275


Master Proj Proj ect: Desig Design n of Left Fork A ssembl ssembly y Recap Recap 

Insert a new empty part and constrain it onto Insert the skeleton



Create Cre ate the right fork’ s g eome eometry try PowerC PowerCopy opy



Use right fork’s design PowerCopy PowerCopy in t his new part by changing s ome geometrical geometrical references



Instantiate all compo nents needed Instantiate needed f or t he assembly



Modify Skeleton’s p ara aramete meters rs and not ice automatic geometry geometry modif ications


276


Mast ste er Pro roject: ject: Jack Clea learance rance Check Check Lifting Truck 15 min

The objecti ve of thi s step is to make sure that the 10mm 10mm cl ea earance rance between between “ V4 Jack” Ja ck” and “ top rail” rail” is respe respecte cted. d. HighHigh-le leve vell instruction for this exercise exercise is provided.


An aly ze th e cl earan ce b etw een t he j ack and th e fo rk gu id e (i.e. (i. e.,, the suppor ting top rail).

•

Perform a modif ication to th e correct skeleton Perform skeleton specification to achi eve the clearance. clearance.

•

Restart the analysis to check the impact o f the design Restart change.


277


Mast Ma ster er Project: Proj ect: Jack Clea Clearanc rance e Check Check (1 (1/3 /3)) Continue with the models used in Step 4. If you did not complete Step 4, use Lifting_Truck_Step5.CATProduct. Here He re is a list of required tasks to gui de you: 1. Create Create a clear clearanc ance e analy analysis sis in Assembled_Carriage.CATProduct. • Create Create a clear clearanc ance e analys analysis is as as shown shown using Fork_ Fork_Guide Guide (Fork_ (Fork_Guide. Guide.1) 1) and Fork_Jack_V4.CATProduct (Fork_Jack_V4_STEP1________SESSI ON) as the the selectio selections. ns. • Apply Apply it. it. You You have have three three resu results lts for whic which h distance values are less than the required clearance. • Select Select one of them them.. A new new wind window ow shows shows a 3D preview of concerned sub-elements of the selections. • Select Select the the inter interfer ferenc ence e with with the low lowest est spacing value. • Click Click OK. OK. The The spac spacing ing val value ue appea appears rs in in the 3D view. The analysis appears in the tree under the Applications branch.


278


Mast Ma ster er Project: Proj ect: Jack Clea Clearanc rance e Check Check (2 (2/3 /3)) Here is a list of required tasks to gui de you Here (continued): 2. Use a sect section ioning ing view view to to gain gain a better better view of the clearance, and of the geometric modification you will make. • Create Create a sect section ioning ing vie view w in in In In Assembled_Carriage.CATProduct. • Cut the 3D view view alo along ng sect section ion vie view. w. • Place Place sec sectio tion n view view on the gap dimension.


279


Mast Ma ster er Project: Proj ect: Jack Clea Clearanc rance e Check Check (3 (3/3 /3)) Here is a list of required tasks to gui de you Here (continued): 3. Modify one speci specificati fication on in in the the skeleto skeleton n to correct the clearance around V4_Jack. • In Assemble Assembled_C d_Carri arriage age.CA .CATP TProd roduct uct,, edit Carriage_Sk Carria ge_Skeleton eleton and increase the offset value of Plane Plane_fork _fork_Jack_ _Jack_height height_posit _position ion by 10mm. • Up Upda date te the the ass assem embl bly. y. • Notice Notice that that the the followi following ng elemen elements ts have have been been automatically modified. •

For ork k su supp ppor ortt pl pla ate

•

Righ Ri ghtt for fork k & le left ft fo fork rk

•

Jack Ja ck hei eigh ghtt pos posit itio ion n

•

Bolts Bol ts con constr strain ained ed wit with h tho those se ele elemen ments ts

•

The Th e sec secti tion on vi view ew is al also so up upda date ted d

• Edit Edit the clear clearanc ance e analysi analysis s to re-app re-apply ly with with the same parameters. No interference must be detected detected now. You You can use a Dista Distance nce & Band Analysis to measure the new distance.

4. Save All


280


Mast Ma ster er Project: Proj ect: Jack Clearance Check Check Re Recap cap 

An aly ze th e cl earan ce b etw een t he j ack and the fork gu ide (i.e. (i.e.,, the supporting top rail)



Perform a modif ication to th e correct Perform skeleton specification to achieve the clearance



Restart the analysis to check the impact o f Restart the design change


281


Shortcuts F1

Link to on-line documentation

Ctrl + several selections

Multiple selection

Shift F1

Contextual help for an icon

Shift + 2 selections

Selection of all elements

Shift F2

Overview of the specification tree

between and including the 2

F3

Hide/Show the specification tree

selected elements

Ctrl + Tab Change CATIA V5 window

Al t F8

Macros

Ctrl N

New file

Al t F11

Visual Basic editor

Ctrl O

Open file

Al t + Enter

Properties

Ctrl S

Save file

Al t + MB1

Pre-selection Navigator

Ctrl P

Print

Ctrl F11


Ctrl Z

Undo

Up/Down or Left/Right arrow


Ctrl Y

Redo

Shift + MB2

Local zoom and change of

Ctrl C

Copy

Ctrl V

Paste

Shift + manipulation with

Displacement respecting

Ctrl X

Cut

compass

constraints

Ctrl U

Update

Ctrl F

Find


viewpoint

282


Glossary Ac ti vat e: It is an operation of making a component active by double-clicking on it.

Boolean operation: It is an operation in which two or more bodies are added, removed, split, trimmed.

Ad d: It is a Boolean operation operation in which which features in another body are added to the current body.

Cache: It is an option by which you can enable the visualization mode wherein light CGR models will be loaded while opening the assembly in CATIA.

Af fec ted Part : This is a part which is affected by the Boolean operation and will undergo change in its geometry as a result of this operation. Af fi ni ty : It is an operation in which an element is transformed by applying X, Y, Z affinity ratios with respect to a reference axis system. As sem bl e: It is a Boolean operation in which a union will be performed between the two bodies. As sem bl y feat ur e: It is a feature created by assembly Boolean operations (split, hole, pocket). As so ci ati vi ty : It is a term which represents interdependent relationships between entities.

Center Curve: It is a tangency continuous curve Center along which a rib or a slot feature is computed. CGR: It is a CATIA Graphical Representation (CGR) file type. Child feature: It is a feature originating from an original feature (parent feature). Closing Points: It is the end point of the profile Component. Concurrent engineering: It is a practice in which the design of various parts in an assembly is done concurrently by various designers and final assembly is created after integrating these parts.

Bill of mate material: rial: It is a list of data about the components contained in the active component.


283


Glossary Construction geometry: It is a set of geometric elements used in the sketch profile as construction elements and are useful in constraining / creating main sketch profile. Coupling: It is an option in Multi-section Solid definition. The coupling decides the shape of the multi-section solid computed between the two sections. Define in wo rk obj ect: It is making the current Define feature active. Degree of fr ee Degree eedom dom : It is a numerical value indicating the number of ways a part can move in the 3D space. Design mode: It is a mode in which the geometrical representations of the assembly and its parts are loaded and accessible for review and modification. Design Ta Design Table: ble: It is a table containing various configurations of design created by a specifying a set of parameters for each design.

Draft: It is a feature provided with a face with an angle and a pulling direction. Driving part: It is a part whose value is determined by an external parameter and is driven by this external parameter. Driving property: It is a property whose value is determined by an external parameter and is driven by this external parameter. Exploded state: It is a state where the assembly parts are in an exploded condition. Extrapolate: It is an operation in which an element is extended a specified amount while respecting tangency or curvature conditions. Typically a surface boundary can be selected for in order to extrapolate the surface a specified length. Extrude: It is a surface created by extruding a 2D/3D Profile within the defined extrusion limits.

DMU: It is an abbreviation for Digital Mock-Up.


284


Glossary Feature: It is a component of a part. Fillet: It is a curved surface of a constant or variable radius that that is tangent to and joins two surfaces. surfaces. Together these three surfaces form either an inner or outer corner. Healing: It is a process of repairing small gaps between two adjacent surfaces. Hybrid Design: It is a design approach where Wireframe and Surface Geometry and Part Design features can be created in the same body. IGES: It is a file format named for Initial Graphics Exchange Specifications. Instantiate: It is an operation of creating a new instance of a component or its features from same or different documents. Join: It is a wireframe or surface created by joining adjacent wireframe or surface elements.

Load: It is an operation in which the document (CATPart, CATProduct, XLS) is loaded in CATIA. Multi-Body Method: It is an approach where the design of a complex part is split into separate bodies and then the final geometry is obtained by performing Boolean operations on the bodies. Multi-model link: It is a link referring to another part. Multi-section Surface: It is a surface that is obtained by sweeping two or more planar section curves along a spine, which may be automatically computed or user-defined. Multi-section s Solid: It is a solid created by Multi-section computing a solid through the profiles in multiple planes. Non-associativity: It is a term which represents no interdependent relationship between entities. Offset surface: It is a surface that is obtained by offsetting an existing surface a specified distance.


285


Glossary Parent feature: It is a feature which is hierarchically Parent higher in the order of relationships with other features. PartBody: It is a default body created in a CATPart Power copyis a feature created in a part which contains input parameters and features which can be duplicated in another part quickly. Published Geometry: It is a geometry which is exposed and available to external users for selection during contextual design or applying constraints in an assembly. Reflect line: It is the neutral line from which the draft faces will be generated in case of Reflect line drafts. Representation: It is a term which describes the geometrical shape of the part. Revolve: It is a surface of revolution created by revolving a planar profile about an axis.

Scan: It is a process of reviewing the design of the model feature by feature. Selectiv e load: It is an operation in which the Selectiv assembly is loaded in CATIA in stages. Skeleton: It is a part which contains the wireframe geometry, specifying the design of the assembly. Sketch: It is a set of geometric elements/profile created in the Sketcher workbench. Solid Combine: It is a solid created by intersection of two or more extruded profiles. Spine: It is a curve which normal planes are used to position a profile when creating a surface (lofted or swept surface for example). The profile does not necessarily intersect with this spine. Split: It is a feature created by cutting existing elements with other geometric elements (planes, surfaces, etc.).

Rotate: It is an operation in which an element is rotated by a specified angle about the given axis.


286


Glossary Swept Surface: It is a surface obtained by sweeping a profile in planes normal to a spine curve while taking other user-defined parameters (such as guide curves and reference elements) into account.

Visualization mode: It is a mode in which the Visualization lighter CGR models are loaded in CATIA for visualization purpose. The design features of the parts are not seen in this mode.

Symmetry: It is an operation in which an element is transformed by means of a mirror symmetry with respect to a reference plane, line or point.

VRML: It is a file format named Virtual Reality Modeling Language.

Synchronize: It is an operation of updating the link / assembly /document so that design changes done in parent document are propagated.

Wireframe element: It is and element such as a point, line or curve that can be used to represent the outline of a 3D object.

Translate: It is an operation in which an element is displaced along the specified direction by a specified distance. Trim: It is a an operation in which wireframe or surface are cut mutually. V4 model: It is a CATIA V4 model. Vertex: It is a point where more three or more edges meet.


287

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