Patent ID: 7082808
Filing Date: 2006-08-01
Classification: B21C,B21D,B21J

Abstract:
1. A method of making a part with regions of different thickness from a plate workpiece having a pair of substantially parallel plate faces, the method comprising the steps of: fitting the workpiece between a longitudinally extending surface of a die and a substantially parallel surface of a punch and between longitudinally confronting and transversely extending shoulders of the die and punch with the workpiece faces lying flatly against the punch and die surfaces and end edges of the workpiece against the punch and die shoulders, the die being formed at its surface with an opening; relatively shifting the die and the punch to move the respective shoulders longitudinally together parallel to the surfaces and faces and thereby longitudinally compressing the workpiece to extrude the workpiece transversely into the opening in the die surface while bracing the workpiece transversely against the punch surface.