Hydraulic forming process and apparatus

Details Hydraulic forming process and apparatus Hydraulic forming process and apparatus

1982-01-21

1984-07-17

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72347, 72354, B21D 2210

Patent

active

044598360

ABSTRACT:
Apparatus and method for forming a peripheral skirt on a workpiece of metal or other ductile material with reduced pleating of its peripheral edge. The concentric mating male and female dies of the prior art are provided, and in addition at least one drawbar concentric with, outside of, and generally beside the male die guides the outer periphery of the workpiece as the dies are urged together, preventing the outer margin of the workpiece from being folded under and propagating pleats. The drawbars also assist in clamping the outer margin of the workpiece between the dies when the central portion of the workpiece is to be expanded by the application of fluid forming pressure.

REFERENCES:
patent: 1561312 (1925-11-01), Cutler
patent: 3000274 (1961-09-01), Duskey
patent: 3149596 (1964-09-01), DeVlieg et al.
patent: 3285045 (1966-11-01), Berg
patent: 3695201 (1972-10-01), Frankenberg
patent: 3934440 (1976-01-01), Berg
patent: 4363232 (1982-12-01), Reitter

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