Patent Number: 6,170,309

Title: Apparatus for simultaneously performing multiple hydroforming operations

Abstract: A hydroforming apparatus for simultaneously performing two or more hydroforming operations includes a frame that is sized to support a plurality of hydroforming dies in a stacked relationship. Each of the dies includes a pair of cooperating die sections having respective recesses formed therein that define a die cavity. Initially, the first die section of the first die is positioned in an uppermost spaced apart position relative to the second die section of the second die, while the second die section of the first die and the first die section of the second die are positioned in an intermediate spaced apart position relative to both the first die sect of the first die and the second die section of the second die. Then, hollow tubular blanks are inserted between the spaced apart die sections of the first and second die Next, the ram and the support mechanism are moved downwardly relative to the be such that the pairs of cooperating die sections of the first and second dies engage one another. End feed cylinders are then moved laterally into engagement with the end the tubular blanks to facilitate the filling thereof with a hydroforming fluid. The pressure of the fluid within the tubular blanks is then increased to such a magnitude that the tubular blanks are expanded outwardly into conformance with the respective die cavities. Thus, the hydroforming apparatus is capable of performing two or mo hydroforming operations simultaneously to decrease the overall amount of operational cycle time and, therefore, increase overall productivity.

Inventors: Marando; Richard A. (Mohrsville, PA)

Assignee: Dana Corporation

International Classification: B21D 26/02 (20060101); B21D 26/00 (20060101); B21D 026/02 ()

Expiration Date: 01/09/2018