sujet 1- 1

Examen National d’obtention du Brevet de Technicien Technicien Supérieur Centre National de l'Evaluation et des Examens

"ili#re$ &preuve$

PRODUCTIQUE

1

13

Session Mai 2013

Electromécanique Electromécanique & Systèmes Automatisés

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%urée$ 'oe((icient$

2 Heures 15

résentation du su)et Une société, spécialisée dans la production et la commercialisation des ensembles mécaniques, envisae de produire une nouvelle amme de réducteur de vitesse représenté sur ocument 1 !dessin d"ensemble#$ %a &abrication envisaée sera lancée en série annuelle de 2 unités$

Document : 1

*éducteur de vitesse

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Examen national national d’obtention du Brevet de Technicien Technicien Supérieur + Session Mai 2013 "ili#re $ Electr omécani ,ue - S.st#mes /utomatisé s

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remi#re partie $ Technologie de fabrication & BM

2 13

(10 points).

(n se propose de &aire l"étude de réalisation d"une pi)ce mécanique &aisant partie du s*st)me réducteur de vitesse !ocument 1# + %a pi)ce étudiée est le pinon pinon  denture droite rep)re3 !m- 2# en acier C. trempé et revenu représentée sur le dessin de dé&inition !Document !# %a pi)ce brute, est obtenue par &oreae &oreae  c/aud sur marteau marteau pilon !dessin de brut#, %a &abrication envisaée sera lancée en série annuelle de 2 unités$  Données : 0%a &abrication envisaée sera réalisée dans un atelier équipé de  •

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Travail à faire : (Document réponse DR1 & DR)

1-Technologie 1-Technologie de fabrication :

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de Boint, les dépouilles extérieures et intérieures et le cordon de bavure 1*$* onner le but et l"in&luence des deux traitements t/ermiques !trempe et revenu# sur

l"évolution des caractéristiques mécaniques de la pi)ce 2-Bureau des Méthodes :

!*1* Expliquer selon la norme les deux spéci&ications portées sur le dessin de dé&inition 

+ !*!* édier le contrat de p/ase (Doc! DR) correspondant  la réalisation de D+ase( 1" sur un

8our  avec reprise sur mandrin  3 mors durs  serrae concentrique$ 

la p/ase considérée !8ournae !8ournae 1er coté# Contient les opérations suivantes  •

ressae de la &ace ;1 en &inition

•

C/ariotae de F1 en ébauc/e

•

C/ariotae de F1 en &inition

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•

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(Alésoir en ARS Ø32H7)

•

C/an&reinae de C1

(outil en Carbure)

(Outils en Carbure)

Travail à faire :

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ur le croquis de p/ase   %es

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Document Ré.onse ( DR1

a!e

Examen national national d’obtention du Brevet de Technicien Technicien Supérieur + Session Mai 2013 "ili#re $ Electr omécani ,ue - S.st#mes /utomatisé s Ensemble $ ++++++++++++++++++++++++++++++++++++++++++++++++ Elément $ +++++++++++++++++++++++++++++++

;


13

BUREAU DE METH!DE

CONTRAT DE PHASE hase n4 $

Mati#re $ ++++++++++++++++++++++++++++++++

%ési!nation de la phase $ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Etat du brut $ ++++++++++++++++++++++++++

Machine $ +++++++++++++++++++++++++++++++++++++++++++++

orte pi#ce $ ++++++++++++++++++++++++++++++++++++++++++++++

?Isostatisme  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

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Document Ré.onse ( DR!

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%euxi#me artie $ "e#tion de $roduction & ualit

= 13

(6 points).

ans un souci d"obtention d"obtention de certi&ication I( K2 et d"amélioration la productivité de ses unités de production, l"entreprise décide d"adopter et mettre en pratique les di&&érentes tec/niques de estion  le Buste  temps !A48#, !A48#, E, les 5 , DC4$ "autre part revoir l"implantation de mac/ines en sections /omo)nes et opter pour l"implantation en Llots de production$ %"ilot de production suBet d"étude !&iure suivante# permet la réalisation de divers ensembles mécaniques$ Il sera équipé robots industriels pour le c/arement et le déc/arement des pi)ces sur les di&&érents postes$

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Examen national national d’obtention du Brevet de Technicien Technicien Supérieur + Session Mai 2013 "ili#re $ Electr omécani ,ue - S.st#mes /utomatisé s 

10


13

%"étude portera sur la mise en place d"un premier poste automatique de manutention$ %es di&&érentes tMc/es ainsi que leurs durées et les antériorités sont  Tache

Dé s i gnat i on

Durée ( he ur e )

Ant ér i or i t és

A

Etude de l"implantation du robot



000000

/

15

4

C

Conception des composants supports CMblae du s*st)me

1

4

D

imulation des traBectoires du robot

5

O

E

ise au point des traBectoires

12



0

éalisation des composants supports

1





Conception de la pince robot spéci&ique

1

C

2

2

I,E,A

I

Essais de &onctionnement ontae des composants supports

5

;

3

&abrication de la pince robot spéci&ique

K

O

3-Gestion de production : (Document réponse DR#)

#*1* Droposer deux avantaes de l"implantation en ilots de productions par rapport  l"implantation en sections /omo)nes #*!* onner l"obBecti& de c/acune des tec/niques de estion  A48, A48, E #*#* En adoptant la tec/nique PERT pour la estion de ce proBet d"implantation d"un robot a* Compléter le tableau des niveaux !en ré&érence au tableau des antériorités# 4* 8racer le réseau DE8 et en déduire la durée lobale du proBet c* Identi&ier le c/emin critique et les tac/es tolérant un &lottement -!ualité : (Document réponse DR#) $*1* Expliciter les mots suivants  4udit, 4udit, Certi&ication

$*!* onner la sini&ication des initiales DC4 et proposer un sc/éma !roue de emin#

Troisi#me Troisi#me artie $ Maintenance

(4points)

%e service de maintenance se c/are de suivi des quelques mac/ines !éc/antillon de 1mac/ines# participant  l"activité de l"entreprise et Puvrant dans les m6me conditions$ %a consultation du dossier /istorique !HE# de c/aque équipement a permis de relever les données concernant le nombre de pannes  )ac+ine

5om4re e .annes

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1

2

1

3

2

Q

2

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5

.

.

3

R

1



Q

K

15

1

5

11


13

%e but de l"étude est d"améliorer la ,ia4ilité des di&&érentes mac/ines et de décider Suant  l"ordre de priorité qu"il &aut donner$ "- #ui$i des é%uipements : (Document réponse DR$)

%*1* dé&inir les expressions suivantes  la &iabilité, ocument 8ec/nique d"un Equipement !8E# %*!* En utilisant la mét/ode mét/ode 4C 4C !ou loi de Dareto#  a* Compléter le tableau des valeurs cumulées 4* 8racer la courbe 4C c* éterminer l"ordre de priorité et la décision qu"il &aut prendre@

3-Gestion de production : #*1* eux avantaes de l"implantation en ilots de productions ections /omo)nes  •

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

•

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

#*!* l"obBecti& de c/acune des tec/niques de estion   A48 

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGG$$ GGGG$

 5

 GGGGGGGGGGGG$$$GGGGGGGGGGGGGGGGGG$$GGGG

 E

 GGGGGGGGGGGGGGGGGGGGGGGGGGGGGG$$ GGG$

#*#* Oestion de proBet avec la tec/nique DE8  a*

%e tableau des niveaux  'i(e 1 2 Tach e#

4*



ébut

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Q

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5

.

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4

&in

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12


13

?%a durée lobale du proBet  GGGGGGG

%es tac/es du c/emin critique  GGGGGGGG$GGGGGGG

c*

%es tac/es tolérant un &lottement  GGGGGGGG$GGGGGGGGGGG$GG -!ualité : (Document réponse DR#) $*1* 4udit  GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG Certi&ication  GGGGGGGGGGGG$$GGGGGGGGGGGGGGGGGG )ac+ine

5om4re e .annes

6aleur cumulée

somme

T

GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGG GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG $*!* les initiales DC4 et proposer un sc/éma !roue de emin# P( GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG D( GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG C( GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG A( GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG %céma (Roue (Roue de Demin') : GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG GGGGGGGGGGGGGGGGGGGGGGGGG$GGGGGGGGGGGGG "-#ui$i des é%uipements : %*1* é&initions 

Document Ré.onse ( DR#

 %a

;iabilité  GGGGGGGGGGGGGGGGGGGGGGGGGGG$$ GGGG$ G$$$G$$$GGGGGGGG$$$GGGGGGGGGGGGGGGGGG$$ GGG

 $8$E 

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGG$$GGG$

GG$$$$GGGGGGGGG$$$GGGGGGGGGGGGGGGGGG$$GGG

%*!* 4pplication de la loi de Dareto aux équipements 

a0 Classement Classement et tableau tableau des des valeurs valeurs cumulées cumulées 



a!e

13 13

b0 Courbe 4C 4C

c0 l"ordr l"ordree de prio priorit rité é  G$$$G$$$GGGGGGGG$$$GGG$$$G$$GGGGGGGGGGGGGGG  GG$$GGGG$$$G$$$GGGGGGGG$$$GGGG$$GGGGGGGGGG  $$$G$$$GGGGGGGG$$$GGGG$$GGGGGGGGGGGGGGGG ?écision du service de maintenance  GGGGGGGGGGGGGGGGG$$GGGG$ G$$$G$$$GGGGGGGG$$$GGGG$$GGGGGGGGGGGGGGGGG$$ GGG G$$$G$$$GGGGGGGG$$$GGGG$$GGGGGGGGGGGGGGGGG$$ GGG

Document Ré.onse ( DR$

sujet 1- 1

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