I want to use Inventor to make a real sheet metal box. This box has a bottom, four sides, and folded over to the inside flanges along the four edges. Very standard.
If I design from a flat sheet, the piece has a cross shape, with little 45 degree cuts at the corners of the cross arms so that when you fold in the edge flanges they don't interfere.
I'm sure Inventor can do this, but I'm still climbing that learning curve... It clearly knows about the problem from a general point of view, because it has a 3-fold corner tool, and this is a three fold corner, except that one of the folds is a seam.
What I did:
1. Make a face (the bottom of my box).
2. Make four flanges for the sides of my box.
3. Apply the corner seam tool to try and fool Inventor into treating the box corners as bends.
4. Make the final lip flanges and get an error about self intersecting parts...
5. Make a face. 😠