Chamfer WF2

Try sweeping a 45 around the outside edge of the part. The outside edge would be the sweep trajectory and the round boss silhouette would be a constraining entity in sketcher. If you can't get it to stay 'attached' to the boss or it won't go all the way around because of the way Pro/e splits circles, sketch past the boss surface and ignore the silhouette.

You need a variable angle chamfer, which means you need a blend.

Or maybe a cut rotated about a circle the size of the middle, round boss. The angle would be fixed and the final chamfer shape would resemble a square, sharpened pencil with cylindrical, not shaprened, "lead". So many interpretations means some ambiguity in the question.

I got it to work with a varable section sweep, using where the cylinder meets the square as the origin, the outer edge of the square as "chain

I will have a go at the blend.

Thanks

Geoff

When you try the blend, go to the Control Points tab and manually define a set of control points mapping each of the block's rad tangent points to a circle quadrant. You should end up with four triangular planar faces and four "conic" faces (similar to creating a developable square to round transition).

Thanks Jeff, worked great.