Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1982-09-02
1984-10-02
Combs, E. Michael
Metal deforming
With use of control means energized in response to activator...
Metal deforming by use of roller or roller-like tool element
72 37, 72 38, 72 60, 72342, 72364, 72700, B21D 2220, B21D 3100, B21D 3716
Patent
active
044740441
ABSTRACT:
A flat blank of a metal which becomes superplastic at elevated temperatures is transformed into a part of the desired configuration in an apparatus that is utilized in connection with a hydraulic press, the apparatus having a lower section that is mounted on the press bed and an upper section that moves with the press ram. The lower section includes a forming tool having a contoured surface, the configuration of which corresponds to that which is to be imparted to the blank, and a cooling passage that surrounds the tool. The blank is positioned over the tool and cooling passage of the lower section. The upper section includes a chamber enclosed by walls and a bulkhead, another cooling passage at the lower end of the chamber walls, an infrared emitter within the chamber, and infrared optical sensors that are located outside of the chamber but view the blank through tubes that extend through the bulkhead and the emitter. In use, the press forces the upper and lower sections of the apparatus together so that the blank is captured tightly between the two sections in the region of the cooling passages. Indeed, the upper section at its cooling passage seals against the blank so that the blank forms one wall of the chamber, thus completely isolating the chamber from the surrounding atmosphere. An inert gas is introduced into the chamber and the emitter is energized. The infrared radiation from the emitter raises the temperature of the blank, and when the temperature is detected by the optical sensors, reaches the superplastic region, the pressure of the inert gas within the chamber is increased sufficiently to deform the superplastic portion of the blank against the contoured surface of the tool. The emitter is turned off when the formed part is removed from the lower section, and this may be done manually and without any special protective clothing or equipment.
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Acker, Sr. Michael J.
Leistner Theodore E.
Combs E. Michael
McDonnell Douglas Corporation
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