Thanks very much for your reply Frank, but it seems something is wrong, you split this part into two, what I want is a single sheet metal part, after unfold it will become two parts,
In that case you go to the model just after the "split body" or just after the "delete faces".
Then "Make new Parent"
In the new assembly you create two new files; one for the flange and one for the box.
In each seperate file you wave link the corresponding body.
If you do the wavelinked body before the conversions, you might have to redo those sheet metal steps in the new files.
Have a look at the assembly attached;
Thanks so much, maybe I am not saying that clearly, I want this part as a single sheet metal parts, and the cut should look like this, but the cut seems not good and should prevent unfold interference, what should I do about it?