Workflow: extruding a chamfered face

[Anonymous]

This is a fully parametric shape starting with a box. I'd like to extrude the highlighted faces, but neither Extrude nor Push/Pull seems to want to allow any of the curved surfaces. There doesn't seem to be a "Normal Extrude" that I can find, and offsetting this to a new body in the Patch environment is giving me less desirable geometry. 

Here's the simple shape: http://a360.co/2gUAyi7

Any ideas would be greatly appreciated! Thanks for helping me learn!

[lichtzeichenanlage]

Im wondering what the experts will say. My rule of thumb is, that I do fillets at the most last point in the timeline. Your design is just based on fillets. See this post as an subscription to the thread 😉

[TrippyLighting]

You'll have to do that in the Patch environment with the Create->offset command. This will create new surfaces offset from the original surfaces, meaning you'll have to delete the original faces and then do some lofting and stitching.

[Anonymous]

Thanks so much! I'm looking into stitching.

Is there a reason why, in this case, these faces can't be extruded simply? Is it something about the parametric nature of this shape?

[laughingcreek · Accepted solution]

"Extrude" only works on Planer surfaces.

If you "Push/Pull" the faces you indicated, Fusion is going to interpret that as an attempt to adjust the chamfer.  This mostly fails because of the complexity of the geometry.

I can't really visualize what your trying to achieve as an end result, but it's possible that you will be able to get what you want with doing the following-

-remove the chamfer

-place a "plane along path" on the edge that had the chamfer

-place a sketch on this plane, and then sketch the cross section of the shape you want to achieve along the edge

-"Sweep" the sketch, using the edge as a path.

Maybe you could sketch on a picture what you are trying to achieve?  you'll probably get a better answer that way.

As a general rule, fillets and chamfer should be used at the very end of a model, and only then used for cosmetic purposes, not for achieving the general shape of an object.  This is partially a limitation of the way fillets and chamfers are implemented in fusion.  Fusion will get confused pretty quick when you start layering fillets.  There are of course exceptions to every rule. 

[lichtzeichenanlage]

Thats a sketch based way to create the form. Feel free to download. I haven't done the fillets and chamfers. Would be nice to know what your final design would look like. For beginner like me it might be a nice exercise. 

[Anonymous]

Hey thanks so much for the suggestions! I'm still wrapping my brains around this. 😄