Community
Fusion Support
Report issues, bugs, and or unexpected behaviors you’re seeing. Share Fusion (formerly Fusion 360) issues here and get support from the community as well as the Fusion team.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Converting a self-intersecting surface into a solid

3 REPLIES 3
Reply
Message 1 of 4
ahmed3ZMZE
158 Views, 3 Replies

Converting a self-intersecting surface into a solid

Given the following surface, built using a closed path and a sweep profile,

Screenshot 2023-08-26 at 5.48.59 PM.png

 

there will be a self-intersecting surface:

Screenshot 2023-08-26 at 5.49.10 PM.png

Screenshot 2023-08-26 at 5.49.21 PM.png

 

A simple patching of the upper side works, but fails on the lower edge since it is self-intersecting. My goal is to build a solid body; what can I do?

 

For context, this is a contrived example to demonstrate my goal of building a volcano-like tapering of the sides of random sketch shapes. It is worth mentioning that I have tried to use a loft operation with an intermediate offset of the sketch shape, but got some weird behaviour. It would seem like this would be rather straight forward to implement, but I am new to CAD, in general, and F360, in particular.

 

FWIW, here's the link to the design: https://a360.co/45o947p

 

Labels (2)
3 REPLIES 3
Message 2 of 4
TrippyLighting
in reply to: ahmed3ZMZE

That cannot be done without creating interior surfaces, which will likely lead to continued modeling problems.

The boundary fill tool can create a solid, but if you use the section view tool in the inspect menu, you'll find that you have interior geometry, which should not be the case.

TrippyLighting_1-1693074079392.png

 

A loft to a 2nd profile is definitely the right tool.

 

Peter Doering
Message 3 of 4
ahmed3ZMZE
in reply to: TrippyLighting

Fair enough @TrippyLighting , but wouldn't then make sense for this loft functionality to work consistently across the profile? Why is there a "crease" in the resulting solid?

Screenshot 2023-08-26 at 11.29.11 PM.png

 

Am I missing something or is this a bug?

Message 4 of 4
ahmed3ZMZE
in reply to: ahmed3ZMZE

Seems that the "Direction" option for the profile option in the loft dialog helps and even precludes the need for an intermediate (middle) profile in this case. However, with a slightly more elaborate base profile (the one that defines the "volcano mouth" shape), self-intersection happens for some reason. I will follow up on this as soon as I get your feedback. I appreciate it in advance!

P.S. Rhino 7 has a much more predictable loft behaviour and I have as much experience in it as in F360.

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report