GaryJB Posted January 20, 2010 Share Posted January 20, 2010 Is there an easy way to make 3d interior thread? Quote Link to comment
Ray Libby Posted January 20, 2010 Share Posted January 20, 2010 What's a 3d interior thread? Quote Link to comment
michaelk Posted January 20, 2010 Share Posted January 20, 2010 Do you mean interior pipe thread? I'm not sure how real world pipe threads work, but it is possible to model something close using a solid subtraction... michaelk Quote Link to comment
GaryJB Posted January 20, 2010 Author Share Posted January 20, 2010 How did you go about this? I have tried subtracting 3D threads from a solid and VW comes up with an error saying: You have tried to created a solid object which cannot be computed. Edit geometry to resolve this condition. Thanks Quote Link to comment
michaelk Posted January 20, 2010 Share Posted January 20, 2010 I'll attach an example. There were some changes in the solid modeling engine from 2008 to 2010, so I'm not sure what it will look like when you open it... Here's what I did to make the attached object. Extrude along path to create a pipe w/ the correct ID and OD. -Draw a triangle w/ part of one point where it looks like the threads should go... -Insert 2D locus along center line of pipe -Sweep (set sweep angle to 10*360? [however many rotations you need] and set pitch to whatever is really is - I used .125" which is probably really coarse - and I'm sure I made the triangle too big!) Subtract solids. hope this export works... michaelk Quote Link to comment
GaryJB Posted January 21, 2010 Author Share Posted January 21, 2010 Thank you, this is very helpful I have done something similar but this is a far better representation. Quote Link to comment
michaelk Posted January 25, 2010 Share Posted January 25, 2010 The end of the thread cut bugs me... This is the same idea: 1 extrude along path + a sweep (10 revolutions @ .125 pitch) + a sweep w/ the same profile & pitch, but only 1/2 revolution. After a solid subtraction like the last one, position the 1/2 sweep at the hard end of the thread cut. Then decrease the radius of the 1/2 sweep and reposition until the thread doesn't have a "hard end". Subtract solid. There must be a more elegant solution that I'm not seeing... Quote Link to comment
islandmon Posted January 27, 2010 Share Posted January 27, 2010 In 2006 I created a tutorial : Image of Bolt with Threads exposed Here's the file: Bolt Thread tutorial Ancient history .. hope this helps. Quote Link to comment
michaelk Posted January 27, 2010 Share Posted January 27, 2010 Islandmon Much more elegant way of creating threads! I still wish there was a way to get the sweep to do X revolutions and then progressively decrease the radius for Y revolutions. Thanks for digging into the archives. I always enjoy looking at your stuff. michaelk Quote Link to comment
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