Welding torch oscillation apparatus

Details Welding torch oscillation apparatus Welding torch oscillation apparatus

1977-12-05

1980-02-12

Reynolds, Bruce A.

Electric heating

Metal heating

By arc

228 27, B23K 912

Patent

active

041885252

ABSTRACT:
Apparatus for rapid and automatic welding of joints which interconnect sections of pipe, and in particular oil or gas transmission pipe. The system includes at least one torch transport assembly which simultaneously moves a plural number of welding torches along a path parallel to the pipe joint being welded. The torch transport assembly includes track segments which surround circumferential portions of the pipe joint, with a welding torch carrier and multiple torches being independently movable along each track segment. The torch transport assembly is mounted on a support apparatus which is rigidly clamped to the pipe sections during welding, and which permits the torch transport assembly to be rapidly positioned in rough alignment with a pipe joint. The torch transport assembly and selected operating parameters of each welding torch are adjusted to accurately position each torch with respect to the pipe joint, and to repeatably provide programmed welding parameters resulting in a uniform pipe joint weld. The present system is disclosed in the context of hot-wire gas-tungsten arc welding torches, and in the operating environment of out-of-position joint welding.

REFERENCES:
patent: 3230341 (1966-01-01), Blackburn
patent: 3586943 (1971-06-01), Gonzalez
patent: 3777101 (1973-12-01), Gwin et al.
patent: 3989921 (1976-11-01), Ohi et al.
patent: 4019016 (1977-04-01), Friedman et al.
patent: 4034184 (1977-07-01), Fernicola

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