Patent ID: 6474126
Filing Date: 2002-11-05
Classification: B21D

Abstract:
An apparatus for drawing a heavy gage workpiece into a drawn part, said apparatus comprising:a lower die section comprising a base mounting surface thereon and a die cavity in said base mounting surface; riser means, mounted to said base mounting surface of said lower die section, for supporting the workpiece a spaced apart distance from said base mounting surface of said lower die section; and a punch adapted to reciprocate past said riser means, said punch having an end face thereon; wherein the workpiece is located on said riser means over said die cavity, such that as said punch is advanced or retracted position to a lowered position into said die cavity, said end face of said punch contacts the workpiece, said punch and said riser means cooperating to pre-draw the workpiece as said punch moves toward said lower die section but before the workpiece enters said die cavity, thus prematurely starting metal flowing in predetermined areas of the workpiece.