Process and apparatus for producing hollow bodies having at leas

Details Process and apparatus for producing hollow bodies having at leas Process and apparatus for producing hollow bodies having at leas

1996-08-15

1998-06-16

Jones, David

Metal deforming

By application of fluent medium, or energy field

With cutting

72 58, 83 53, 83 54, B21D 2602, B21D 2818

Patent

active

057654204

ABSTRACT:
A process for producing a hollow body provided with a transverse branch, in a forming tool from a tubular metal section, which process uses an internal high pressure forming technique. The process provides for the crown of the branch to be punched out by a platen (which supports the branch during its formation), at an internal pressure which is higher than the maximum production internal pressure (Pilmax). The end face of the platen at its head end is for this purpose of a larger dimension than the active supporting face and has a cutting edge which peripherally surrounds the active supporting face, in the manner of a collar.

REFERENCES:
patent: 2238037 (1941-04-01), Cornell, Jr.
patent: 3487668 (1970-01-01), Fuchs, Jr.
patent: 4492103 (1985-01-01), Naumann
patent: 4989482 (1991-02-01), Mason
patent: 5398533 (1995-03-01), Shimanovski et al.
patent: 5435163 (1995-07-01), Schafer
patent: 5445001 (1995-08-01), Snavely
patent: 5460026 (1995-10-01), Schafer
"Aufweitstauchen von Rohren Durch Innenhochdruckumformung", Dr.-Ing. Friedrich Kloss, Blech Rohre Profile, 35 (1988) 3, p. 175.
U.K. Patent Office Search Report, dated Sep. 24, 1996, for corresponding U.K. Patent Application No. GB 9616955.2.

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