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Problem Converting Cone To Sheet Metal Part 6

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neiljones898

neiljones898

Automotive
Oct 1, 2007
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I create a circle and extrude with draft. I shell the cone. I create a rectangle and cut-extrude so that the cone is now split. I select insert bends from the sheet metal tool bar but I am not able to select the edge where I split the cone for the fixed face or edge in the insert bends dialog box. What am I doing wrong?
 
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Even if you were able to select a face, you would not end up with a sheet metal part which could be flattened. Flattening the conical shape would involve plastic deformation (thinning and stretching) of the material ... and that's something SW is only just beginning to handle.

To create the cone, you will need to use the Lofted Bend function. Check the Help file.

[cheers]
 
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Respectfully, CorBlimeyLimey is wrong. A cone is a Gaussian surface and can be flattened without deformation. Grab a sheet of paper and see for yourself.

I just tried and was able to flatten a cone in SW. Make the cone in a non-sheetmetal part as a revolve. Then convert to sheetmetal using "Insert --> Sheet Metal --> Bends" Cone can not be 360° revolve.

I prefer not to use lofted bends as I do not trust the flattening algorithm.

[bat]Honesty may be the best policy, but insanity is a better defense.[bat]
-SolidWorks API VB programming help
 
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I stand corrected. Thank you TheTick. My memory must be going ... I've done that many times.

I was using the draft method per the OP and SW would not allow conversion to an SM part.

[cheers]
 
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Depends how you are going to produce the actual part ... by multiple bumps in a brake press (bend lines needed) or by rolling through tapered rolls (bend lines not needed).

[cheers]
 
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A flat pattern from a revolve will only show the one central bend line with a total degree callout.

To create others for the brake, you can;
1) Sketch them manually in the flat pattern view ... evenly spaced radial lines from the converged centre every X°.
2) Create Sketch Bends on a flat sheet in the model.
3) Create the model using multi-faceted profiles in a loft, and then converting to SM.

[cheers]
 
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