Redrawing-ironing apparatus

Details Redrawing-ironing apparatus Redrawing-ironing apparatus

1984-06-12

1985-09-03

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72481, B21D 2200

Patent

active

045384410

ABSTRACT:
In a redrawing-ironing apparatus provided with a punch fixed on a ram, a die means including a redrawing die and ironing dies, an annular piston for fastening the die means, a cup retained pad adapted to push the inner periphery of the bottom of a drawn cup placed on the redrawing die, and pins fixed on the annular piston and extending axially, the free end surface of the pin is engaged with the flange of the cup retainer pad at the end of the redrawing. As a result, the earing portions of the drawn cup can be prevented from being thinned and broken into fragments at the redrawing.

REFERENCES:
patent: 4043169 (1977-08-01), Gorgius
patent: 4057022 (1977-11-01), Koshino
patent: 4248076 (1981-02-01), Bulso
patent: 4372143 (1983-02-01), Elert

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