Plasma welding process

Details Plasma welding process Plasma welding process

1994-06-28

1997-02-04

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912146, 21912159, B23K 1000

Patent

active

055994695

ABSTRACT:
In a plasma welding process, a voltage is applied between an electrode and an object to be welded so as to generate a plasma arc with a plasma gas directed through a torch to surround the electrode, and welding is performed using the plasma arc as a heat source. The process cyclically varies energy contained in the plasma arc by cyclically varying a plasma gas flow rate.

REFERENCES:
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patent: 3803380 (1974-04-01), Ragaller
patent: 4175225 (1979-11-01), Holko et al.
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patent: 4356372 (1982-10-01), Inscho et al.
patent: 4918283 (1990-04-01), Yamade et al.
patent: 5290995 (1994-03-01), Higgins et al.
Welding Research Supplement, J. K. Martikainen, et al., "Investigation of the Effect of Welding Parameters on Weld Quality of Plasma Arc Keyhole Welding of Structural Steels", pp. 329-340, Jul. 1, 1993.
Patent Abstracts of Japan, JP 55-141394, Nov. 5, 1980.
Patent Abstracts of Japan, JP 60-27473, Feb. 12, 1985.
Patent Abstracts of Japan, JP 4-322884, Nov. 12, 1992.

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