Double action die set for closed forging

Details Double action die set for closed forging Double action die set for closed forging

1989-09-06

1990-12-18

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72407, B21J 912

Patent

active

049777734

ABSTRACT:
A double action die set for closed forging to be equipped in a reciprocating press consisting of a stationary base and a slide. Each die is equipped with one set of a metal mold and a punch. A stationary side die is fixedly secured to the stationary base, while a movable side die is fixedly secured to the slide. Each one of the stationary side die and the movable side die comprises therein a metal mold supporting outer piston of hollow shape, a punch supporting inner piston slidably engaged with a hollow space in the outer piston, and a common oil chamber for supporting the outer piston and the inner piston with a same hydraulic pressure.
According to this invention such advantages as to reduce the height of the die set and to move the pressurized oil only within the same oil chambers can be obtained.

REFERENCES:
patent: 3064507 (1962-11-01), Strugala et al.
patent: 4274276 (1981-06-01), Mettler
patent: 4321818 (1982-03-01), Bessho

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