Method of producing bowl-like metal article

摘要

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.