Difference between progressive and compound die?
Compound Die - A die designed to simultaneously perform more
than one operation with each stroke of the press. For example, a
compound die may blank and pierce in a single stroke.
whereas
Progressive Die - A die containing a series of stations that
perform one press operation after another in series. A progressive
die gradually forms a part as it moves through the die, and the
last operation separates the part.
(Answered by Ravjinder Singh, Dpty.Mgr.- Ashokleyland Ltd.)