Is there a Knurling featurescript available? (like Thread Creator)

michael_mcclain

Hello All,

I am looking for a featurescript which creates knurling on my parts. I am looking for something that takes a cylindrical face and cuts the pattern into the solid body. Normally, I would use cosmetic knurl, but this will be 3D printed so I need geometry to be modified.

I am specifically looking to make a checkered knurl pattern per ISO 13444:2012. If a featurescript is not available then I will gladly accept modeling tips on how to model this correctly.

I already know of the cosmetic knurl featurescript which works great and helps performance in models where knurling impacts performance.

https://forum.onshape.com/discussion/11111/new-featurescript-cosmetic-knurl

Thank you,

Michael McClain

owen_sparks

I'm sure I've seen one.  @sebastian_glanzner was it yours?

Cheers,

Owen S.

sebastian_glanzner

@owen_sparks
Yes, the cosmetic knurl featurescript is from me. But I don't have a script to actual 3D modell it.

@michael_mcclain
If you want to 3D modell you have to sweep the profile along a helix and create a new body. Create a cylindrical pattern and substract it from the main body.

michael_mcclain

@sebastian_glanzner You can see my method of creating the knurling here: 
https://cad.onshape.com/documents/3ecbecb8e65b8ee9f600c960/v/e73a398fae7a2a34f7014dab/e/28e56f0c3fc37d134a971846

I decided to use a projected curve vs a helix to control the angle of the knurl as specified in the ISO standard. How can I get the pattern qty correct to get sharp points on the knurl face?

I welcome any advice or tips on how to model this better.

Thanks, Michael

sebastian_glanzner

@michael_mcclain Thanks for the link!

I made a copy and could get rid of some sharp egdes:

The top face is now smaller (0.25mm wide). I also used a helix and calculated the correct pitch for an 60 deg angle. I shared the document with you. The regeneration time is quite high!

sebastian_glanzner

I had another idea to reduce the regeneration time!
I created a small pyramid and made a few patterns. It is not an exact solution, but the regeneration time is reduced from 56sec to 2.5sec

!

gongloo

michael_mcclain said:

@sebastian_glanzner You can see my method of creating the knurling here: 
https://cad.onshape.com/documents/3ecbecb8e65b8ee9f600c960/v/e73a398fae7a2a34f7014dab/e/28e56f0c3fc37d134a971846

Looks like this document no longer exists or isn't public. Did you happen to stash the FeatureScript somewhere? Would love to take a look!

michael_mcclain

I didn't make a featurescript for a geometric knurl and instead just made an example document showing the features I used to get a knurled pattern. I made the document public and updated it a little to explain the features.

Just be aware that knurling makes studio regen times very slow. That small part has a regen time of almost 20sec! I would recommend using this cosmetic knurl featurescript