I'm having two problems with the attached part and its mating piece.
First, when I insert sheet metal bends in this part, I get the message "No bends found", and the part won't flatten. It seems to be a problem where the large rolled section meets the flat sides at a sharp bend. If I build a similar part with the large radii, it flattens with no problem.
Second, since the assembly consists of two rolled parts welded together, I want to machine steps into the straight edges when the parts are flat so that they're easier for the welder to assemble after rolling and bending. (I gave up on a sweep cut along the curved edges.) But no matter where in the Feature Manager I put the stepped edges, they disappear after inserting the sheet metal bends. Is there any way to do this, or does sheet metal automatically imply plain square edges?