发明授权
US5953945A Method and apparatus for wrinkle-free hydroforming of angled tubular
parts
有权
成角度管状零件无皱纹液压成形的方法和装置
- 专利标题: Method and apparatus for wrinkle-free hydroforming of angled tubular parts
- 专利标题(中): 成角度管状零件无皱纹液压成形的方法和装置
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申请号: US167674申请日: 1998-10-07
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公开(公告)号: US5953945A公开(公告)日: 1999-09-21
- 发明人: Frank A. Horton
- 申请人: Frank A. Horton
- 申请人地址: CAX Concord
- 专利权人: Cosma International Inc.
- 当前专利权人: Cosma International Inc.
- 当前专利权人地址: CAX Concord
- 主分类号: B21D26/043
- IPC分类号: B21D26/043 ; B21D26/045 ; B21D39/20 ; B21D26/02
摘要:
A method of hydroforming an angled tubular part comprising disposing an angled metal tubular blank within a generally correspondingly angled die cavity, the tubular blank having an exterior surface, wherein at an angled portion of the tubular blank, the exterior surface has a concave surface portion and a convex surface portion on generally opposite sides of the tubular blank, sealing opposite ends of the tubular blank, providing high pressure fluid to an interior of the tubular blank, expanding the blank into conformity with surfaces defining the die cavity as a result of said providing. Force is applied to at least one end of the tubular blank so as to create longitudinal flow of metal material within the tubular blank to maintain a wall thickness of the blank within a predetermined range wherein a greater amount of force is applied to a portion of the tubular blank which is longitudinally aligned with the convex surface portion of the tubular blank in comparison with the amount of force applied for a portion of the tubular blank which is longitudinally aligned with the concave surface portion of the tubular blank so as to create a greater amount of flow of metal material toward portions of the tubular blank adjacent the convex surface portion in comparison with portions of the tubular blank adjacent the concave surface portion, so as to inhibit wrinkle formation at the portions of the tubular blank adjacent the concave surface portion. A hydroforming die apparatus is disclosed for practicing the method as well as the angled tubular part which is made by the method and apparatus.
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