Process for forming curved hollow elements and an apparatus for

Details Process for forming curved hollow elements and an apparatus for Process for forming curved hollow elements and an apparatus for

1978-06-09

1980-06-03

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72169, B21D 2200

Patent

active

042055466

ABSTRACT:
A method and apparatus of forming curved hollow elements by drawing comprising providing a die having an inlet opening, providing a punch which is mounted for rotation at a center of rotation which is in the plane of the inlet opening with the punch having a shape of a section of an annulus with a center of the annulus corresponding to the center of rotation of the punch, placing a blank over the inlet opening of the die and driving the punch into the inlet opening to shape the blank into a curved hollow element. The blank is held over the die inlet opening by a blank holder and hydraulic or pneumatic jacks are connected to the die and/or punch for moving them with respect to each other to form the curved hollow elements.

REFERENCES:
patent: 435939 (1890-09-01), Mathewson
patent: 1962510 (1934-06-01), Kellogg
patent: 2418393 (1947-04-01), Bridgens
patent: 2560822 (1951-07-01), Robinson

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