| 摘要 |
PURPOSE:To weld a filler and metals to be welded with good efficiency, by supplying the filler in the space between the metals to be welded and using laser plasma after melting the same with a heat source except a laser. CONSTITUTION:Metals 3, 3 to be welded are placed on a moving table so as to face to each other apart at about 0.5-2.0mm.. A filler 2 is supplied in the space 4 and the filler 2 is melted by a TIG torch 9 to form a bridge in the space 4. Thereafter, laser beam 1 is irradiated to the bridge part from a laser welding nozzle 5 while the bridge is in the high temp. state; at the same time, an inert gas is ejected from the tip of the nozzle 5 through the gas introducing port 7 of the nozzle 5, thereby forming plasma in the irradiated part. On the other hand, an inert gas is blown from a nozzle 8 for controlling plasma to control the plasma so as to thrust the same into the weld zone. The welding is accomplished by the heat energy thereof. |
