FIELD: technological processes.
SUBSTANCE: invention can be used for laser cleaning of welded surfaces from undesirable layers and contaminants in preparation for laser welding of a steel spunbonded pipe billet with a thickness of 8 to 45 mm. Defocused collimated laser beam is scanned over the cleaned surface of the moving steel molded tube billet on either side of the midline of the future weld. Scan with a variable repetition rate of pulses of laser radiation with a varying pulse duration. In this case, the average maximum radiation power is changed and at the same time a continuous quality control of the purification is performed. At the required quality of cleaning, the value of the radiation power is fixed and does not change it until the surface cleaning is completed.
EFFECT: invention reduces the probability of formation of weld defects by performing cleaning of the welded surface directly during the welding process.
3 cl, 1 dwg
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