Blankholder for a draw press

Details Blankholder for a draw press Blankholder for a draw press

1986-10-14

1988-05-24

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

B21D 2221

Patent

active

047457929

ABSTRACT:
A blankholder having a central opening for applying pressure against the flange of a blank being drawn through a die in a draw press. The blankholder is divided into individual segments defined by its inner and outer peripheries, at least one continuous divisional line intermediate the inner and outer peripheries, and radii extending outwardly from the central axis. Each individual segment is provided with a different power source so that each segment can provide a force to the blank flange independent of the force being applied by any other segment.

REFERENCES:
patent: 682866 (1901-09-01), Asche
patent: 3349153 (1967-10-01), Beck
patent: 3420089 (1969-01-01), Myers
patent: 3494169 (1970-02-01), Saunders
patent: 4090389 (1978-05-01), van Denderen et al.

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