Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1978-07-06
1980-04-22
Gilden, Leon
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
29 131, 72360, 72370, B21D 2200
Patent
active
041988434
ABSTRACT:
A cold working process for the manufacture of a hollow tubular metal article having a shaped head, the process comprising: (a) supporting an open-ended hollow metal tube on a first forming tool with one end of the tube projecting beyond the end of the tool, (b) initially necking the projecting end of the tube in a necking die, and thereafter, with the necked tube held in the die by the first forming tool, (c) compressing the necked portion of the tube between the first forming tool and a second forming tool to form the shaped head.
REFERENCES:
patent: 2089912 (1937-08-01), Bignelli
patent: 2394842 (1946-02-01), Catlin et al.
patent: 2397206 (1946-03-01), Ryan
patent: 2980993 (1961-04-01), Lyon
patent: 3456479 (1969-07-01), Matveev
patent: 3948073 (1976-04-01), Levell
patent: 4068518 (1978-01-01), Dockerill
Gilden Leon
Jackson William E.
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