Doing a reverse fillet on a curved edge

fabian_paal

I just started learning CAD and I am currently working on a part that needs a reverse fillet.

I already looked for answers on the forum and reddit, but all the ones I found worked by just removing a certain shape (e.g. a circle) from the edge, wich only works with straight parts. In my case I need that reverse fillet around a sort of elliptical shape.

The inner edge that is highlighted in the screenshot is the edge that I want to fillet.

I also already tried too add a fillet on the edge below that and that gave me a curvature in the right direction but it keeps the outer ring the same width, which I don't want.

S1mon

You can sweep a circle (or circles) and remove that from the edge. In this case, you could also sweep the whole part with the reverse fillets as part of the swept section.

https://cad.onshape.com/documents/3bc7706bc414b0b287f6f5d0/w/2540557c976905a12b2f8624/e/e2e141a99e2980e923860783

S1mon

You can sweep a circle (or circles) and remove that from the edge. In this case, you could also sweep the whole part with the reverse fillets as part of the swept section.

https://cad.onshape.com/documents/3bc7706bc414b0b287f6f5d0/w/2540557c976905a12b2f8624/e/e2e141a99e2980e923860783

fabian_paal

Thank you very much!! That works perfectly!