Apparatus for drawing circular cups from non-circular blanks

Details Apparatus for drawing circular cups from non-circular blanks Apparatus for drawing circular cups from non-circular blanks

1985-04-19

1986-08-05

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72347, B21D 2200

Patent

active

046035710

ABSTRACT:
An apparatus and method are disclosed for drawing a metal cup from a metal sheet. Initially, a non-circular blank is provided from the metal sheet by a blanking device. Subsequently, a first drawing device draws a non-circular cup from the non-circular blank such that more stretching takes place where the blank perimeter is closer to the geometrical center of the blank than the stretching which takes place where the blank perimeter is further from the geometrical center of the blank. Finally, a second drawing device draws a circular cup from the non-circular cup. Preferably, the provided blank is hexagonal or rectangular shaped and the associated non-circular cup is then similarly shaped. The second draw device is also preferably a reverse draw device.

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