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
1 Copyright 2006 JD Mather
1. Start a new Standard(in).ipt and sketch Figure 2.
2. Extrude the sketch down a distance of .85in with a taper of -6째.
3. Shell the part with a thickness of .0625 removing the top face as shown.
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.)
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.
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.
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.
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.
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9. Fillet the inside edges Radius .0625 by selecting Feature â€“ Rib and the All Fillets checkbox.
10. Turn the part over and Shell to a thickness of .02 removing the outside faces.
11. Save the file with the name Ice Cube Tray.ipt.
12. Start a new Standard(in).ipt and Derive the Ice Cube Tray as a Solid Body.
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13. Start a new sketch on the xy-plane and sketch the rectangle shown.
14. Extrude the rectangle 1 inch. Save the file with the name Ice Cube Tray Toolbody.ipt.
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.
16. Start a new Standard(in).ipt file and Derive the Ice Cube Tray Toolbody file as Body as Work Surface.
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17. Start a new sketch on the xy-plane and project the outside edges of the derived surfaces.
18. Extrude the sketch 1.875in.
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).
19. Save the file with the name Ice Cube Tray Cavity.ipt.
20. Start a new Standard(in).ipt file and Derive the Ice Cube Tray Toolbody file as Solid Body.
11 Copyright 2006 JD Mather
21. Derive the Ice Cube Tray as Body as Work Surface.
22. Split the Work Surface from the part and save the file with the name Ice Cube Tray Core.
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.