FIELD: process engineering.
SUBSTANCE: invention relates to arc welding and can be used, primarily, in orbital welding of fixed butts of pipelines. Proposed method comprises welding of root weld and facing welds of butts at oscillation of non-fusible electrode across the weld. Note here that non-fusible electrode touches opposite edges of the weld to define the spacing there between. Coordinates of every pass lengthwise axes are defined in the given weld relative to one of its edges as well as non-fusible electrode oscillation amplitude. Welding device comprises welding power source, automatic welding device control unit, non-fusible electrode oscillator with the drive and controller and torch transverse displacement actuator. Besides, it has low-voltage power source, test current transducer, programmable computer, info signal primary processing unit and info and control I/O unit.
EFFECT: enhanced performances, higher quality of welds.
2 cl, 2 dwg
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