Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1974-08-22
1976-03-09
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 728
Patent
active
039423530
ABSTRACT:
A high energy rate counterblow forming machine having opposing independently movable coaxial rams movable within pressure chambers containing a compressible working fluid for impelling the rams toward one another at high velocity from retracted cocked positions, through working strokes, into forming impact with work parts held in a bolster located between the rams. Operatively connected to the rams are power activated ram retractor means for retracting the rams to cocked position and thereby compressing the ram working fluid. The rams are held in their cocked positions by latches which are releasable in unison to release the rams for movement in unison through their working strokes to form the work parts without unbalanced impact loads on the machine. One described forming machine is adjustable to accommodate work parts of widely varying sizes.
REFERENCES:
patent: 422557 (1890-03-01), Wellman
patent: 2532397 (1950-12-01), Evans et al.
patent: 3404555 (1968-10-01), Murek
patent: 3488990 (1970-01-01), Brown
Brown Boniard I.
Larson Lowell A.
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