Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1978-02-06
1980-11-18
Gilden, Leon
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72342, 72364, B21D 2604
Patent
active
042338310
ABSTRACT:
A method is provided for controlling the strain rate during superplastic forming of a blank of material into a part. The method produces a part in a minimum time by deforming the material under suitable-optimum superplastic conditions. A relationship is determined between time and the pressure required to form the blank against the configured surface of a die at a strain rate which causes the blank to flow superplastically. The blank is positioned in the die and held at a temperature at which the material exhibits superplasticity. Pressure is applied to the blank in accordance with the previously determined relationship between time and pressure until the part is formed.
REFERENCES:
patent: 3340101 (1967-09-01), Fields et al.
patent: 3920175 (1975-11-01), Hamilton et al.
patent: 3927817 (1975-12-01), Hamilton et al.
patent: 3934441 (1976-01-01), Hamilton et al.
patent: 4023389 (1977-05-01), Dibble et al.
Hamilton C. Howard
Weisert Edward D.
Gilden Leon
Rockwell International Corporation
Silberberg Charles T.
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