Method and apparatus for forming and welding thin-wall tubing

Details Method and apparatus for forming and welding thin-wall tubing Method and apparatus for forming and welding thin-wall tubing

1990-03-05

1991-02-26

Heinrich, Sam

Metal fusion bonding

Process

With shaping

228 157, B23K 506, B23K 9025

Patent

active

049955497

ABSTRACT:
A method and apparatus for forming thin-wall tubing in a funnel die or with a series of sets of forming rollers. The tubing is then welded by a method and apparatus which includes simultaneous guiding of the both the inner and outer peripheries of the tubing during the welding operation by a mandrel and a sleeve, respectively, so that lack of rigidity of the tubing is not a limitation. The edges of the tubing are not clamped, but are allowed to "float" during welding in one embodiment, a water-cooled heat sink is used to remove the heat of welding. The resulting tubing is highly uniform. A wide range of tubing materials can be welded and thin-wall tubing of nearly any desired length or wall thickness can be produced.

REFERENCES:
patent: 4905885 (1990-03-01), Hellman, Sr.

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