| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To contrive the reduction of cost and the improvement of the quality of welding by making secondary work unnecessary by preventing the change of color in a weld zone and the generation of a plume in the fine welding by a laser beam. <P>SOLUTION: The laser beam is adjusted into a prescribed fine spot diameter and a prescribed output in accordance with the weld zone of a workpiece and radiated by increasing the laser power intensity of the center axis and also a prescribed flow rate of argon assist gas is jetted in the radiating direction of the laser beam in the whole periphery and blown toward the weld zone. In slow welding speed region where the welding speed of the laser beam is slower than preset standard welding speed, the flow of the argon assist gas is increased. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
