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Hydroforming method and hydroforming apparatus of tubular blank having an oval cross-section
Hydroforming method and hydroforming apparatus of tubular blank having an oval cross-section
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机译：具有椭圆形横截面的管状坯料的液压成形方法和液压成形设备
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摘要
The present invention relates to a method and apparatus for forming an elongated tubular metal member from a tubular metal blank. The method comprises: i) placing a tubular metal blank having a generally oval cross-section into a die cavity and orienting the tubular metal blank such that a relatively larger cross-sectional dimension of the generally oval cross-section extends generally in a direction of the relatively larger cross-sectional dimension of the die cavity and such that a relatively smaller cross-sectional dimension of the generally oval cross-section extends generally in a direction of the relatively smaller cross-sectional dimension of the die cavity; ii) engaging and sealing opposite ends of the tubular metal blank; and iii) injecting fluid under pressure into the tubular metal blank so as to expand the tubular metal blank into conformity with the surfaces defining the die cavity and thereby transform the tubular metal blank into the elongated tubular metal member.
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