| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a welding method by which blow holes are reduced cost effectively in welding of plated material. <P>SOLUTION: In the welding method for welding plated materials W<SB>1</SB>, W<SB>2</SB>, a molten pool P is formed by a plasma arc A and the plated materials W<SB>1</SB>, W<SB>2</SB>is irradiated with a laser beam nearly vertically in a region of the side of the advancing direction of the welding than a plasma keyhole PK of this molten pool P. In this way, the laser keyhole LK is formed in the vicinity of a convection which flows in the direction in which the molten pool becomes deep gradually. Then, when the plating is vaporized by the heat of the laser keyhole LK, because the vaporized plating is pushed in the direction in which the molten pool becomes deep, the vaporized plating is mounted on the convection in the molten pool P, flowed backward and discharged to the outside. Consequently, the generation of the blow holes is prevented. Because it is not necessary to form a projecting parts by working the plated material W<SB>1</SB>, W<SB>2</SB>, the welding is performed cost effectively. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
