Method and tool for contracting tubular members by...

Metal deforming – By application of fluent medium – or energy field – Using fixed die

Reexamination Certificate

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C072S062000, C072S058000, C029S419200, C029S421100

Reexamination Certificate

active

07905129

ABSTRACT:
A tubular preform is contracted in an electro-hydraulic forming operation. The tubular preform is wrapped with one or more coils of wire and placed in a chamber of an electro-hydraulic forming tool. The electro-hydraulic forming tool is discharged to form a compressed area on a portion of the tube. The tube is then placed in a hydroforming tool that expands the tubular preform to form a part.

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V. Psyk, C. Beerwald, W. Homberg, M. Kleiner, Electromagnetic Compression as Preforming Operation for Tubular Hydroforming Parts, 1st International Conference on High Speed Forming—2004, Chair of Forming Technology, University of Dortmund, Germany, pp. 171-180.

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