UNDERWATER WELDING NOZZLE

摘要

PROBLEM TO BE SOLVED: To form a stable cavity part when lap fillet weld is executed. SOLUTION: In an underwater welding nozzle, a cylindrical water curtain W7 is formed by curtain water W injected through an annular water curtain outlet 18 of a nozzle 11 and a cavity part is formed on the inner side of the water curtain by shield gas G flowing to the inner side of the water curtain. a tip surface 31 of the nozzle is inclined by an angleβwith a plane 33 orthogonal to an axis 32 of the nozzle.