Process for manufacturing hollow one-piece metal elements

Details Process for manufacturing hollow one-piece metal elements Process for manufacturing hollow one-piece metal elements

1991-01-31

1992-03-24

Jones, David

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 61, 294211, B21D 2602

Patent

active

050976893

ABSTRACT:
A process for producing hollow one-piece elements having a highly curved lateral wall from metal, in particular copper or copper alloy, pipes. A cylindrical pipe is widened via permanent deformation between two appropriately shaped dies, by simultaneously applying hydraulic pressure directly inside the pipe and axial pressure on the opposite ends of the pipe; the required finished shape being achieved in successive stages, by inserting inside the dies molds having a predetermined profile and of gradually increasing size.

REFERENCES:
patent: 3160130 (1964-12-01), Pesak
patent: 3335590 (1976-08-01), Early
patent: 3974675 (1976-08-01), Tominaga
patent: 4437326 (1984-03-01), Carlson
patent: 4840053 (1989-06-01), Nakamura

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