Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1998-10-07
1999-09-21
Jones, David
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72 62, B21D 3920, B21D 2602
Patent
active
059539453
ABSTRACT:
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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Cosma International Inc.
Jones David
LandOfFree
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