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公开(公告)号：EP0865841A3
公开(公告)日：2000-06-28
申请号：EP98104841.6
申请日：1998-03-17
CPC分类号： B21D11/02
摘要： A process for stretch forming hollow metal bodies, such as aluminum alloy extrusions. The extrusions are stretched longitudinally, bent transversely of the pulling direction, and then subjected to pressure from an incompressible fluid in a hollow interior. In a preferred embodiment, the incompressible fluid is water at a pressure sufficient to deform at least part of the extrusion outwardly of its hollow interior. The incompressible fluid reduces dimensional distortions in the shaped product.
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公开(公告)号：EP0865841A2
公开(公告)日：1998-09-23
申请号：EP98104841.6
申请日：1998-03-17
CPC分类号： B21D11/02
摘要： A process for stretch forming hollow metal bodies, such as aluminum alloy extrusions. The extrusions are stretched longitudinally, bent transversely of the pulling direction, and then subjected to pressure from an incompressible fluid in a hollow interior. In a preferred embodiment, the incompressible fluid is water at a pressure sufficient to deform at least part of the extrusion outwardly of its hollow interior. The incompressible fluid reduces dimensional distortions in the shaped product.
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