Stretch drawing apparatus

Details Stretch drawing apparatus Stretch drawing apparatus

1982-01-28

1984-02-21

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72347, 72379, B21D 2200

Patent

active

044322224

ABSTRACT:
A stretch drawing apparatus comprising a constraining die having an inner die portion and an outer wall portion spaced apart from the die portion, a drawing punch positioned in conjunction with the die portion, a blank-holding block positioned in conjunction with the outer wall portion of the constraining die, the constraining die and each of the drawing punch and the blank-holding block being movable relative to each other in a predetermined direction so that the die portion and each of the drawing punch and the blank-holding block are movable toward and away from each other, and at least one wedge member having a blank-holding surface and movable in a direction perpendicular to the predetermined direction, wherein the wedge member engages the constraining die and the blank-holding block and has a thickness which increases away from the die portion toward the outer wall portion of the constraining die.

REFERENCES:
patent: 909342 (1909-01-01), Smith
patent: 2985128 (1961-05-01), Henrickson
patent: 3550421 (1970-12-01), Stokel
patent: 3664172 (1972-05-01), Cvacho
patent: 3668914 (1972-06-01), Voitsekhovsky
patent: 4195510 (1980-04-01), Juergens

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