How to flatten a pipe with non-linear edge?

Hello everyone.
I want to flatten a pipe that has non-linear edge. In linear pipe, I easily use "insert bends" then with "flatten" create my model. But in non-linear, when I use the "insert bend" command in sheet metal part, an error appears that "non-linear edge is invalid". Does anyone have any idea to solve this problem?

3 Answers

How do you want to un fold a torus ?
A torus is a bent tube.

unfold a toric surface gives a bad result

Answered with a tutorial: https://grabcad.com/tutorials/how-to-flatten-a-pipe-with-non-linear-edge

Exist some applications for Solidworks to do this
- blankworks
- logopress