Here's something interesting - anyone got any real solutions?
When doing this kind of operation, where the assembly of the part deforms the material, it causes some issues. Obviously you want the hole to be the correct size for the sheet metal part as punched. You have to make the stud at it's correct size also. Unfortunately when they are assembled in real life the stud swages the sheetmetal. In the CAD assembly it is not really efficient to try to model this as an assembly edit or new configuration of the detail part. So what happend is you get an interference between the two. This doesn't seem so bad until you make a drawing of the assembly. Then, because the two parts interfere, you start loosing lines (edges) on those parts on your drawing views (and not always just the intersections either!). The same happens if you have parts that are positive press fits where the diameter of the "shaft" is larger than the diameter of the "hole".
3/4 of all the Spam produced goes to Hawaii - shame that's not true of SPAM also.......