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Wrapping tread accurately around a tyre - possible?
SledDriver
Member Posts: 117 ✭✭✭
I've been attempting to wrap an accurate tread pattern around a tyre, but the results are unsatisfactory. Check out this document:
https://cad.onshape.com/documents/589323adb204b50ff2cad640/w/841a281b817a68bea31e61fa/e/4e0c720dc39bd17743dda3b0
If you look at Version 1 of the document you can see the 'valleys' of the tread are stepped, and not consistent in depth. This is because I cannot see how I can map the basic tread sketch pattern onto a curved surface.
If you go to the Main version of the document you can see the problem. The sketch is flat, and the tyre surface isn't.
If I could just map a sketch to a curved surface accurately I could then thicken it and boolean it with the tyre, but I'm falling at that first hurdle.
Other than turning my brain inside out doing extreme 3D construction and projection/intersection of curves to compute a curved tread starter pattern, does anyone have a manageable method of producing an accurate result with consistent depth tread throughout the tread pattern around the tyre?
I looked for a FeatureScript which might help but didn't find one.
Is this functionality likely to be coming to OS any time soon? It seems OS needs a new set of tools for things which are not simple geometrically.
Cheers,
John
https://cad.onshape.com/documents/589323adb204b50ff2cad640/w/841a281b817a68bea31e61fa/e/4e0c720dc39bd17743dda3b0
If you look at Version 1 of the document you can see the 'valleys' of the tread are stepped, and not consistent in depth. This is because I cannot see how I can map the basic tread sketch pattern onto a curved surface.
If you go to the Main version of the document you can see the problem. The sketch is flat, and the tyre surface isn't.
If I could just map a sketch to a curved surface accurately I could then thicken it and boolean it with the tyre, but I'm falling at that first hurdle.
Other than turning my brain inside out doing extreme 3D construction and projection/intersection of curves to compute a curved tread starter pattern, does anyone have a manageable method of producing an accurate result with consistent depth tread throughout the tread pattern around the tyre?
I looked for a FeatureScript which might help but didn't find one.
Is this functionality likely to be coming to OS any time soon? It seems OS needs a new set of tools for things which are not simple geometrically.
Cheers,
John
0
Best Answer
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brian_jordan
Member, Developers Posts: 144 ✭✭✭
This file, shared by David Gross, might be of interest.
https://cad.onshape.com/documents/1d04849d34a046c68e704fd2/w/57679519584c4f9da1a4ed89/e/7bf831286d1046a0b8b83e4c5
Answers
I did a search in Public documents for "Tires" and found this model.
Maybe it will give you some new ideas on how to do your tread with the current tools.
https://cad.onshape.com/documents/873331108d947ef94ba1dba1/w/0c8983a04f2f047ff8fcb411/e/c0ee6a632e95c308b9cc8abd
Hope that helps.
John
https://cad.onshape.com/documents/1d04849d34a046c68e704fd2/w/57679519584c4f9da1a4ed89/e/7bf831286d1046a0b8b83e4c