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Descripción: Tutorial Básico de MIT App Inventor 2 para principiantes.
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Descripción: Invertor Basics
Inventor 11 TUTORIAL 3
Surface Caps Learning Objectives After completing this tutorial, you will be able to: • Construct and use surface features in solid modeling • Incorporate surface features in part design when appropriate • Construct Revolved surfaces • Use surfaces for Splitting solids Required Competencies Before starting this tutorial, you should have been able to: • Construct, constraint and dimension sketches • Project geometry on sketch planes • Extrude sketched profiles • Revolve sketched profiles • Loft sketched profiles • Understand the concepts of work and placed features • Understand how to manipulate the history tree in the browser
Figure 1: Screw Driver
Tutorial 3
Surface Modeling
1 Copyright 2006 JD Mather
The model in Figure 1 could be done with only the Inventor solids tools, but we will use surfaces to create the solid in order to become more familiar with working with surfaces. 1. Open the Screwdriver Handle Toolbody.ipt file and revolve the Palm End and Finger End sketches as surfaces.
Figure 2
2. Extrude the Grip sketch From‐To the two revolved surfaces. Bu sure to uncheck extended face on the finger end of the handle.
Figure 3
2
Surface Modeling
3. You might want to personalize your model. When creating sketch text immediately dimension the text box and then you can click and drag the lower left hand corner to rotate the text. Add constraints and/or dimensions to lock down the desired location.
Figure 4
4. When using the Emboss tool you can change the color property by clicking on the color swatch button. Save the file.
Figure 5
Tutorial 3
Surface Modeling
3 Copyright 2006 JD Mather
5. Open the Screwdriver Blade.ipt and drag the EOP marker so only sketch 1 & 2 are visible. I want to loft sketch 1 along two rails. The rails cannot be in the same sketch so I mirrored the first rail and changed to construction lines. This has changed for Inventor 11. You can now have multiple rails in a sketch. The rails are mirrored so that if I change the original the mirrored copy will also change.
Figure 6
6. Start the Loft command and select the two closed sections and then select the rail exactly as shown and select OK if it is not grayed out. You could get an error or the OK button will be grayed out. Cancel the command and start again.
Figure 7
4
Surface Modeling
7. The key to this problem is to select the sketch line a second time. Note that this time the line and the arc highlight red. You might run into this same type of problem when part of the Rail sketch is projected geometry. Select the mirrored rail and then OK. Examine the loft results.
Figure 8
8. I want more control over the shape of the loft. Undo the loft and make Sketch4 visible. Create a loft again this time using 4 rails.
Figure 9
Tutorial 3
Surface Modeling
5 Copyright 2006 JD Mather
9. After Lofting the solid make Sketch5 visible.
Figure 10
10. Extrude the sketch as a surface mid‐plane through all.
Figure 11
6
Surface Modeling
11. Split the part with the surface and then turn off the visibility of the surface.
Figure 12
12. Make Sketch6 visible, Extrude as a surface mid‐plane through all and Split from the part. Turn off the visibility of the surface. Save the file.
Figure 13
Tutorial 3
Surface Modeling
7 Copyright 2006 JD Mather
13. Place the Screwdriver Handle Toolbody.ipt and the Screwdriver Blade.ipt. Place mate – flush constraints between the yz, xz, and xy planes with a ‐4 offset on the latter. Save the file as Screwdriver Handle Toolbody.iam.
Figure 14
14. Start a new part file and click Return to exit sketch mode. Derive the Screwdriver Handle Toolbody.iam setting the Screwdriver Blade to be subtracted from the Handle.
Figure 15
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Surface Modeling
15. Save the file with the name ScrewdriverHandle.ipt. (You will have to change the color Properties of the embossed text faces.)
Figure 16
16. Assemble the completed Handle and Blade in a new assembly file and save with the name Screwdriver.iam.
Figure 17
In this tutorial we learned how to use surfaces to “cap” solids to simplify the modeling process. We also learned how to use surfaces to Slice solids and how to used Derived assemblies for Boolean operations.
