straight threads?

Oct 07, 2005 2 Replies

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dlevy 20 years ago

I realize SW wants me to use cosmetic threads (as per the training class) however....

I would like to draw actual threads. I am currently cutting and pasting thread profiles from autocad and then revolving. This works quite well however the threads are not spiraled (even though they are much nicer than cosmetic threads).

I downloaded a model of a socket head cap screw from McMaster Carr and they seem to be able to represent the thread correctly (with the spiral). I really need to correctly model the thread since we generate NC code from the model.

How do the experts do it? Thanks.

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Brian 20 years ago

Create the correct helix, make a plane "normal to curve" at one of the endpoints, sweep your thread profile along the helix. Be warned, however, that graphically displaying actual threads is not a job for a low end computer. If you need the parts in any assembly, or sub-assembly, I'd strongly recommend maintaining a configuration without the threads.

Brian Hokanson Starting Line Products

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jmather 20 years ago

Something like this? (Delete the last feature used to make the file size smaller.)

formatting link

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