Issuu on Google+

Inventor 11 TUTORIAL 5

Derived Work Surfaces 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  Create Drafted Ribs  Use Derived Work Surfaces 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: Ice Cube Tray Tutorial 5

Surface Modeling

1 Copyright 2006 JD Mather


1. Start a new Standard(in).ipt and sketch Figure 2.

Figure 2

2. Extrude the sketch down a distance of .85in with a taper of -6째.

Figure 3

2

Surface Modeling


3. Shell the part with a thickness of .0625 removing the top face as shown.

Figure 4

4. Create a workplane -.125 from the top of the part and start a new sketch on the plane. (Tip: You can simultaneously create a workplane and start a sketch by starting the sketch command and click and drag from a planar face.)

Figure 5

Tutorial 5

Surface Modeling

3 Copyright 2006 JD Mather


5. Project the inside straight edges and draw a line from midpoint to midpoint across the long length. Create a point at the beginning of the line.

Figure 6

6. Make Sketch1 visible and start the Rectangular Pattern command. Select the point as the Geometry to pattern and select the line for the direction. Set the number of copies to 7 and the distance to be a function of the length distance/7.

Figure 7

4

Surface Modeling


7. Create a perpendicular line near the second point and then offset near each of the other inside points. Place coincident constraints with the points and lines.

Figure 8

8. Start the Rib command and select the long line and 6 perpendicular lines. Set the direction to down with a Taper of 6째. Uncheck Extend Profile as it is not needed with our sketch.

Figure 9

Tutorial 5

Surface Modeling

5 Copyright 2006 JD Mather


9. Fillet the inside edges Radius .0625 by selecting Feature – Rib and the All Fillets checkbox.

Figure 10

10. Turn the part over and Shell to a thickness of .02 removing the outside faces.

Figure 11

6

Surface Modeling


11. Save the file with the name Ice Cube Tray.ipt.

Figure 12

12. Start a new Standard(in).ipt and Derive the Ice Cube Tray as a Solid Body.

Figure 13

Tutorial 5

Surface Modeling

7 Copyright 2006 JD Mather


13. Start a new sketch on the xy-plane and sketch the rectangle shown.

Figure 14

14. Extrude the rectangle 1 inch. Save the file with the name Ice Cube Tray Toolbody.ipt.

Figure 15

8

Surface Modeling


15. Start the Delete Face command and select the Lump or Void option. Then select the internal void by pausing over the part and then use the select other tool. Save the file.

Figure 16

16. Start a new Standard(in).ipt file and Derive the Ice Cube Tray Toolbody file as Body as Work Surface.

Figure 17

Tutorial 5

Surface Modeling

9 Copyright 2006 JD Mather


17. Start a new sketch on the xy-plane and project the outside edges of the derived surfaces.

Figure 18

18. Extrude the sketch 1.875in.

Figure 19

Then start the Sculpt command and be sure to change to Remove. Select the derived worksurface to remove (you might need to flip the direction).

10

Surface Modeling


19. Save the file with the name Ice Cube Tray Cavity.ipt.

Figure 20

20. Start a new Standard(in).ipt file and Derive the Ice Cube Tray Toolbody file as Solid Body.

Figure 21

Tutorial 5

Surface Modeling

11 Copyright 2006 JD Mather


21. Derive the Ice Cube Tray as Body as Work Surface.

Figure 22

22. Split the Work Surface from the part and save the file with the name Ice Cube Tray Core.

Figure 23

In this tutorial we learned how to use Derived Work Surfaces to create associative geometry between parts. This technique could be used in the creation of core/cavity molds. Of course there is much more to mold design than the information covered in this tutorial.

12

Surface Modeling


Inventor 11 tutorial 5