| 摘要 |
<p>A laser welding method for stacked workpieces according to the present invention, a laser irradiation diameter that is irradiated on a surface of one workpiece 1 among two stacked workpieces 1 and 2 is set such that a laser irradiation diameter B at a weld ending-edge portion is equal to or greater than approximately 1.5 times a laser irradiation diameter A at a weld starting-edge portion. Thus, at the weld ending-edge portion, the material is melted in a wider area compared to the conventional example, and therefore, the melted material is supplied to the center portion of the weld ending-edge portion while the weld ending-edge portion is solidifying. As a result, a depth of the recess at the weld ending-edge portion can be made shallow enough to guarantee the welding quality of each of the workpieces 1 and 2.</p> |
