FIELD: electricity.
SUBSTANCE: tack welding is performed on the outer side of the pipe, followed by the application of final weld by means of laser welding. Preliminarily line marking is done. The lines are marked using a laser marker on the outer surface of the pipe billet along the root face at a distance of 3-5 mm from the line to edge butt, that is scanned by the first laser sensor along the length of the pipe, recording in the data base. Then after tack welding, using at least one second laser sensor, scanning across the butt, the distance between the marked lines is determined. Based on the previously obtained data, the exact location of the edge butt is defined, pointing the laser beam at them when applying the final weld.
EFFECT: invention allows to improve the quality of laser welding, to increase the accuracy of location of the edge butt.
3 dwg
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