Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1977-10-04
1980-01-01
Gilden, Leon
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72342, 72364, B21D 2604
Patent
active
041810007
ABSTRACT:
A method and apparatus are provided for automatically controlling the strain rate during superplastic forming of a blank of material into a part. The method and apparatus produce a part in a minimum time by deforming the material in its 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 automatically applied across the thickness of the blank in accordance with the previously determined relationship between time and pressure until the part is formed. The apparatus comprises conduits connected to a die and to a high pressure gas. Valves in the conduits regulate the pressure applied to the blank. A controller receives command signals from a programmer which is programmed with the desired time vs pressure relationship. The controller operates the valves and receives feedback information from a pressure transducer in the conduit to maintain the programmed time vs pressure relationship during the forming operation.
REFERENCES:
patent: 2767837 (1956-10-01), Nachtman
patent: 2814101 (1957-11-01), Prough et al.
patent: 3187544 (1965-06-01), Bridwell
patent: 3339387 (1967-09-01), Myers
patent: 3340101 (1967-09-01), Fields, Jr. et al.
patent: 3920175 (1975-11-01), Hamilton
patent: 3927817 (1975-12-01), Hamilton
patent: 3934441 (1976-01-01), Hamilton
patent: 4035858 (1977-07-01), Dahl
Curnow John M.
Hamilton C. Howard
Paton Neil E.
Gilden Leon
Humphries L. Lee
Malin Craig O.
Rockwell International Corporation
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