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Sweep a thread with a helix
Kai_himself
Member Posts: 45 ✭✭
Hello,
i like to sweep a thread with a helix around a cylinder.
I draw a 3/4 " thread in Skizze 3(Sketch 3), unfortunately the sweep didnt work.
"It is not possibly to generate a valid geometry" but why ?
Here is the projectlik:
Can someone show me please, what is wrong with Sketch 3 and why sweep didnt work ?
Best regards
Kai
0
Comments
Your sketch region is the same width as the helix pitch. The sweep feature in OnShape cannot handle self intersecting geometry - even if it's only faces or edges overlapping with no volume intersection.
ah ok, thank you for your answer. I change the pitch to 1.8 mm now it works.
At a very precsise drawing how to deal with a width and pitch of 1.814 mm ?
Best regards
Kai
I've recently been working on modeled threads too. A more reliable (and faster to regenerate) way to do it is to do a revolve at the major diameter of your thread, then sweep your thread profile as a surface. Use the split feature instead of a boolean, and use the thread surface as a tool to split your part.
Mind you I was doing triangular profile threads radiused root threads might be trickier to get right.