| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser welding method that achieves a stable weld zone free from weld defects in lap welding of two members. <P>SOLUTION: For the lap welding of two members 10, 20, a restraining roller 40 is arranged in front of the advancing direction of laser welding, with the laser welding performed while the restraining roller 40 is pressed to an overlapped face. The circumferential face of the restraining roller 40 is provided with a peripheral groove 41 around the circumference, so that a laser beam 51 can be emitted to a welding position 52 without interfering with the restraining roller 40. The contact places 45, 45 where the restraining roller 40 presses the members 10, 20 can be made as close as possible to the welding position 52 by the peripheral groove 41, allowing laser welding to be performed by effectively eliminating a gap between the reverse faces of the members 10, 20. Consequently, simplification of the combining time of the two members can be achieved, to supply a sound weld zone 90 free from weld defects. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
