Electric heating – Metal heating – By arc
Patent
1985-05-28
1986-05-20
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21912422, B23K 912
Patent
active
045903557
ABSTRACT:
In the multi-layer welding of a joint of two pieces of metal to be welded by arc welding, the proper number of passes and the desired tracing positions of a welding torch for each layer are automatically established during the welding of the preceding layer. The welding torch is subjected to a Y-axis control so as to maintain constant the arc voltage or current during the welding and simultaneously the torch is caused to weave in the direction of an X-axis within the groove. The tracing of the groove by the torch is accomplished by controlling the weaving turning positions of the torch in accordance with the X-axis and Y-axis direction displacement data of the torch and the torch displacements in the X-axis direction are compared with a predetermined value thereby determining the proper number of passes to be made in the welding of the next layer.
REFERENCES:
patent: 4394559 (1983-07-01), Nomura et al.
patent: 4491718 (1985-01-01), Cook et al.
patent: 4508953 (1985-04-01), Murakami et al.
Nomura Hirokazu
Sugitani Yuji
Tamaoki Naohiro
Nippon Kokan Kabushiki Kaisha
Shaw Clifford C.
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