Welding method and apparatus therefor

Details Welding method and apparatus therefor Welding method and apparatus therefor

1998-12-31

2000-02-01

Paschall, Mark

Electric heating

Metal heating

By arc

21912145, 21912154, 21912159, 228230, B23K 1000

Patent

active

060205717

ABSTRACT:
An apparatus and method for welding a superalloy article. The apparatus generally entails an enclosure adapted for containing a superalloy article, a polarity-reversing plasma transferred arc welder apparatus for welding a localized region of the article, an induction coil for heating the localized region, and elements for sensing and controlling the temperature of the localized region. The induction coil is placed in close proximity to the localized region of the article so that the temperature of the localized region is largely determined and quickly altered by the output of the coil. The polarity-reversing plasma transferred arc welding apparatus is operated at very low currents of not more than forty-five amps, so that the welding apparatus has only a secondary heating affect compared to the induction coil.

REFERENCES:
patent: 4359210 (1982-11-01), Peterson
patent: 5319179 (1994-06-01), Joecks et al.
patent: 5464958 (1995-11-01), Flowers et al.
patent: 5466905 (1995-11-01), Flowers et al.
patent: 5708253 (1998-01-01), Bloch et al.

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