Chamfering round edge that has multiple segments

[Anonymous]

I imported this model as an stl and converted it to a BRep file.  I cut a chunk off and chamfered 2 edges, but now I need to chamfer the whole outer ring on the top side.  However I can't figure out how to do this.I tried selecting every segment along the edge and chamfering, but I just get errors.  I attached the file so you guys can take a look and tell me how to do this as I have no idea obviously.

Thanks

[etfrench · Accepted solution]

Here's one way:

There are a few extra steps as the Project|Intersect command fails when clicking on OK, but works when hitting the Enter key.

[HughesTooling]

Here's another way using mesh sections to reverse engineer the part and model as an editable brep. Takes a bit longer but the end result is a solid you can easily edit. File's attached.

Mark

[Anonymous]

When I get to the point where you select the triangle and revolve it, I always get an error, typically it is inconsistent edge-face relationships or there was a problem combining geometry together.  Any idea why this might be happening?

Edit, I found a simple workaround by just creating a triangle sketch that uses the intersect sketch as a reference and revolve cutting.  Rather than using a single line to cut directly on the intersect sketch, not pretty like your guy's solutions, but functional