| 摘要 |
PURPOSE:To stabilize the supply of a filler metal and to improve the positioning accuracy at the irradiation point of a laser beam by supplying the electrically heated filler metal onto a laser weld line from the rear of the laser irradiation point in the progressing direction of welding and executing welding. CONSTITUTION:The filler metal 4 is supplied onto the weld line from the rear of the laser beam irradiation point in the progressing direction of welding in the stage of irradiating the laser beam 2 from one side face of a material 1 to be welded and executing penetration welding. The filler metal 4 is made collidable against the beam 2 even in the position in the beam hole formed by the laser beam 2, by which the permissible range H for the supply height of the filler metal 4 is widened. The stabler supply of the filler metal is thus made possible and the positioning accuracy of the laser irradiation point is improved. |
