Method and apparatus for drawing heavy wall shells

Details Method and apparatus for drawing heavy wall shells Method and apparatus for drawing heavy wall shells

1982-08-13

1985-04-09

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72405, B21D 2200

Patent

active

045093563

ABSTRACT:
A forming machine (10) is provided for forming a finished part (12) from a flat blank (14). Draw stations (18-24) are provided to initially form the intermediate part. Each draw station includes a punch (44, 62, 66, 70) and a draw die (48, 64, 68, 72). Each punch defines a shoulder along its length to create a step (60) in the side walls (26) of the intermediate part. In the subsequent necking and final form stages (30, 32, 34) the punch employed also has a shoulder to permit variation of the force applied to the intermediate part between the step and bottom portion.

REFERENCES:
patent: 1412196 (1922-04-01), Rabold
patent: 3893326 (1975-07-01), Oberlander et al.
patent: 3998087 (1976-12-01), Schumacher
patent: 4147049 (1979-04-01), Book

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