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A method for producing a sheet metal article by superplastic or rapid plastic deformation
A method for producing a sheet metal article by superplastic or rapid plastic deformation
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机译:通过超塑性或快速塑性变形生产金属板制品的方法
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摘要
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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