METHOD OF REPAIR OF LONGITUDINAL PIPE WELD, APPLIED BY LASER WELDING Russian patent published in 2017 - IPC B23P6/00 B23K26/20 B23K26/70 

FIELD: technological processes.

SUBSTANCE: repair includes defect detection, defect sampling and sample filling. The equipment for defect detecting, sampling and sampling filling is installed to work through the control unit in a single coordinate system. In order to detect a defect ultrasonic testing is done by scanning along the weld line using ultrasonic transducers until the defect is defected, constructing a defect coordinate model in the meantime. The data from the coordinate model are used for setting sampling parameters, which are entered in the control unit, which carries out positioning of the milling head at the stage of defect sampling. And at the stage of sample filling it carries out the positioning of optical laser head, which cleans the sampling zone, and positioning of the filling equipment.

EFFECT: invention provides precise guidance of the repair equipment to the defect zone of the pipe weld, applied by laser welding, eliminates any defect in a laser weld with minimum sample size, maximum preservation of the weld geometry and minimizes heat transfer to the repair zone of the weld.

11 dwg