Method for tube forming

Details Method for tube forming Method for tube forming

2007-12-11

2007-12-11

Jones, David B (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S062000, C072S342940, C072S370060, C072S370220, C072S370240, C029S421100

Reexamination Certificate

active

11554153

ABSTRACT:
A method is provided for forming a tube between a pair of dies. The tube is captured between a pair of dies having die surfaces constructed of an electrically non-conducting material defining a die cavity therein. The ends of the tube are sealed and electrical current is applied to the tube to induce electrical resistance heating of the tube. The interior of the tube is pressurized to expand the tube into the cavity to thereby form the heated tube.

REFERENCES:
patent: 5992197 (1999-11-01), Freeman et al.
patent: 6322645 (2001-11-01), Dykstra et al.
patent: 6613164 (2003-09-01), Dykstra et al.
patent: 7024897 (2006-04-01), Pfaffmann et al.

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