Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Reexamination Certificate
2005-05-03
2005-05-03
Crane, Daniel C. (Department: 3725)
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
Reexamination Certificate
active
06886383
ABSTRACT:
A method is disclosed for forming sheet metal articles, such as automotive body panels, having significant curvatures in front-to-back and side-to-side directions. Opposing, complementary, preforming and final shape forming tools are used in a single press. A sheet of superplastically or quick plastically formable sheet metal alloy, heated to a forming temperature, is first stretched against the preform tool by the final shape tool to form a preform that has experienced most of the metal stretching required for the final part shape. The preform is removed from the preform tool and formed against the opposing, final shape tool with pressurized gas to obtain the final sheet metal part shape.
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Goff Michelle R.
Kim Chongmin
Kleber Richard Murray
Konopnicki Mark G.
Kruger Gary A.
Crane Daniel C.
General Motors Corporation
Marra Kathryn A.
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