Invention Grant
US08171769B2 Method of forming a flanged tubular member in hydroforming 有权
在液压成型中形成法兰管状部件的方法

Method of forming a flanged tubular member in hydroforming
Abstract:
A method of forming a flanged tubular member includes the steps of: positioning a tubular blank in a die; applying nominal pressure; closing the dies; and increasing pressure within the blank, thereby converting the tubular blank to a hydroformed member having the flange and a hem with a cavity therein. The die halves define: a die tubular cavity portion; a die hem cavity portion; and a die flange cavity portion. Upon closing the die halves with nominal pressure and then increasing pressure, (1) the blank is deformed within the die tubular cavity portion; (2) the flange is defined from a portion of the blank in the die flange cavity portion; and (3) at least an intermediate hem is defined in the die hem cavity portion.
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