How to make a boolean operation between a fixed part and a moving part ?

brunono553

Hi, I'm trying to make a boolean operation between a moving part (the cylinder on the screenshot below) and a fixed part (the rectangle):


On this version I made a boolean operation in context for the "end" position; but I need to do it for any position of the revolute mate connector (between limits of course).

https://cad.onshape.com/documents/0d95035c769c2fb3af454038/w/2494b64f20d8e32a38f3b57e/e/a0a1f96a27f1325276f03a48

I'm aware that I could do it "manually" in this example; but I need this in the general case for another more complex application:



I suppose that this is a generic 3D design problem that have a particular name but I've searched a lot and found nothing similar. I searched in feature scripts as well but didn't found something like this

Any tip would be more than welcome !

S1mon

Other CAD systems have swept cuts using a solid (think grooves for cam followers, or toolpaths). Onshape doesn't have this, and I'm not aware of any custom features which do exactly what you want. In this particular case, doing it manually is likely your best bet. I might use the Silhouette Split custom feature to find the places where the two end position holes are tangent to the surfaces you'd need to create.

S1mon

Other CAD systems have swept cuts using a solid (think grooves for cam followers, or toolpaths). Onshape doesn't have this, and I'm not aware of any custom features which do exactly what you want. In this particular case, doing it manually is likely your best bet. I might use the Silhouette Split custom feature to find the places where the two end position holes are tangent to the surfaces you'd need to create.

NeilCooke

It can be done, but not really as a generic feature. This was done for a specific task, using configs and instantiator, to find the space envelope of a suspension:

https://cad.onshape.com/documents/408b473b45dbdc2c1ea6f956/w/1d3090ad84ff6ff900bec08c/e/397b5c9a4764bb333502a3e4

In this case, you're always going to get some "faceting" depending upon the resolution you set, so it may be better to get the start and end point and create a surface between them.

brunono553

S1mon said:

Other CAD systems have swept cuts using a solid (think grooves for cam followers, or toolpaths). Onshape doesn't have this, and I'm not aware of any custom features which do exactly what you want. In this particular case, doing it manually is likely your best bet. I might use the Silhouette Split custom feature to find the places where the two end position holes are tangent to the surfaces you'd need to create.

Thanks. I finaly done it 100% "by hand". Long but I made it.
I didn't succeeded to use Silhouette Split in my particular case; but I'll keep in my toolbox ! Thanks for the hint