FIELD: technological processes.
SUBSTANCE: welding laser light (L1) is emitted along the welding zone (C11, C12) on the workpieces (W1, W2), and the reference laser beam (L5) is emitted along the scanning zones (C51, C52) located in the bath (Y1) of the molten metal. The return light emission (L2) is accepted, and the quality control of the weld structure on the part is controlled, based on the comparison of the ratio of the intensity of the response light radiation received from the first region inside the bath of molten metal, and the intensity of the response light radiation received from the second region inside the bath of molten metal located further from the central part of the weld pool, with a specified threshold value.
EFFECT: increased efficiency.
16 cl, 13 dwg
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