Metal deforming – With means to handle work or product – Including product handling means
Patent
1986-09-22
1990-09-11
Seidel, Richard K.
Metal deforming
With means to handle work or product
Including product handling means
72709, 164344, B21D 4502
Patent
active
049560085
ABSTRACT:
An apparatus for superplastric forming of metallic workpieces and, more particularly, aluminum workpieces is disclosed. The apparatus includes a mechanism for ejecting the workpiece from the die upon completion of the superplastic forming process. A steel liner covers the surface of the die cavity, and the workpiece is formed against the liner (which acts as a die surface). The steel liner has high temperature resistance at superplastic forming temperatures providing it with sufficient rigidity to enable it to be removed from the cavity at or near superplastic forming temperatures while still retaining its shape and that of the formed worpiece which it supports. In one embodiment, a cam operated ejection mechanism pushes the liner from the die cavity surface as desired at the end of the superplastic forming process. In another embodiment, the die is provided with apertures through which pressurized gas is directed toward the liner pushing the liner away from the die cavity surface.
REFERENCES:
patent: 3572424 (1971-03-01), Byrne
patent: 3662815 (1972-05-01), Bouyt
Rockwell International Corporation
Seidel Richard K.
Silberberg Charles T.
Weston Harold C.
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