WELDING SECTION CONTROL DEVICE AND METHOD OF ITS CONTROL Russian patent published in 2017 - IPC B23K26/03 B23K26/22 

FIELD: electricity.

SUBSTANCE: welding laser beam (L1) is emitted along the welding area (C11, C12), located on the welded parts (W1, W2) and can also emit the reference laser beam (L5) along the scanning path (C51, C52), located in the melt bath (Y1) on the parts to be welded (W1, W2), which are melted by emission from the welding laser beam (L1). In this case, the response light emission from the welding area is received, and the welded section defects detection is performed by comparing the intensity change frequency of the response light emission received by the light receiving unit, obtained as the result of the Fourier transform or differentiation of the mentioned intensity, with the special frequency, determined by the bath surface oscillation frequency of the welded section at the defect-free state.

EFFECT: using of the invention makes it possible to improve the accuracy of the defects control in the welded section.

4 cl, 13 dwg