variable chamfering
How can I do a variable chamfer in this model, I want the chamfer maintains the same distance to the center of the piece on one side and on the other side maintains the same distance from the edge, like the lines I draw in the model.
Accepted answer
I was able to do a "clean" chamfer if that is what Silva is looking for. See the attached
I did a maneuver to your solid and see the the result. Still not sure were you want the chamfer to start and end as a variable. I save it as an .IPT hopefully you can open it and see the history.
1 Other answer
About the only way to do this is to cut the part by sweeping a profile along the two lines. However, the way you created sketch8 and then projected it onto the surface to create 3D sketch4 had some issues. It had overlapping segments that could not be used as a path or guide rail for the sweep. You must zoom way in to see these overlaps.
I redid sketch 8 using a spline with interpolation rather than just an offset of the existing geometry. I think the result essentially creates the same effect as what you had. When I recreated 3D sketch4 I selected "wrap to surface" rather than "project to closest point". Closest point still created overlapping segments because the collection of surfaces do not apear to be completely tangent.
I extended 3D sketch4 on one end to force the sweep past the end of the part. This may be neccissary any time the paths are not perpendicular to the sketch. The other end of 3D sketch4 had to be extended to the edge of the part due to using "wrap to surface". Sometimes it may be required to extend both ends of both paths.
Once the 3D sketch was cleaned up I swept a simple rectangle along the 3d sketch. I used sketch7 as a guide rail with X-scaling selected. This sweep was cut from the parent body.
I would caution you to get your sketches fully constrained. I believe the root cause of the overlapping segments goes back to sketch5 hardly having any constrainst at all. This is difficult to see because you have over-ridden the default line colors in the sketch.
