Method of joining tubular members

Details Method of joining tubular members Method of joining tubular members

2005-08-02

2005-08-02

Omgba, Essama (Department: 3726)

Metal working

Method of mechanical manufacture

Shaping by direct application of fluent pressure

C029S447000, C029S507000, C072S058000, C072S061000

Reexamination Certificate

active

06922882

ABSTRACT:
A method of joining tubular members together includes the steps of providing an internal tubular member, providing an external tubular member, and heating the external tubular member and/or cooling the internal tubular member. The method also includes the steps of joining the internal tubular member and second tubular member together to form an overlap region of a joined tubular member, and positioning the joined tubular member between open die halves mating with one another to define a tubular cavity portion. The method includes the steps of progressively closing the die halves to progressively deform the joined tubular member within the tubular cavity portion. The method includes the steps of applying hydraulic pressure to expand and conform the joined tubular member to the tubular cavity portion. The method also includes the steps of separating the die halves and removing the expanded joined tubular member from the die.

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Co-pending U.S. Appl. No. 10/125,947, issued Apr. 19, 2002.

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