| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make welding possible with a full penetration depth and width and also at high speed, even for a metallic material of high reflectance. <P>SOLUTION: The purpose is achieved through irradiation and machining of a workpiece 7 with a laser beam, by converging in a manner that the effective spot size D2 of a second laser beam 5 on the workpiece 7 is less than the effective spot size D1 of a first laser beam 3, in the hybrid laser beam 6 in which the different first and second laser beams from two kinds of laser systems A, B are superimposed. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
