Method of producing bowl-like metal article

Details Method of producing bowl-like metal article Method of producing bowl-like metal article

1986-07-30

1988-02-23

Brody, Christopher W.

Metal treatment

Compositions

Heat treating

148127B, 148131, C21D 800

Patent

active

047268522

ABSTRACT:
The invention relates to a method of producing a bowl-like metal article, e.g. a half of a spherical rocket motor case made of a titanium alloy, by first shaping a flat blank into a bowl-like shape by a press forming operation and subsequently making heat treatment of the bowl-like work. Following the press forming operation, the shape of the bowl-like work is corrected by spinning. At the heat treatment a templet member is used to keep the bowl-like work in a restrained state so as to correct possible irregular straining and distortion of the work. Preferably the templet is a bowl-like member designed and disposed such that its outer surface comes into close contact with the inner surface of the bowl-like work by thermal expansion at the heat treatment. Both the thickness of the blank and the amount of machining on the heat-treated work can be reduced.

REFERENCES:
patent: 539089 (1895-05-01), Simonds
patent: 1595725 (1926-08-01), Phillips
patent: 4376662 (1983-03-01), Brimm
patent: 4469530 (1984-09-01), Wyss et al.

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