| 摘要 |
PROBLEM TO BE SOLVED: To perform uniform and stable spot weld capable of easily managing weld penetration depth (melting depth), and capable of adjusting weld spot diameter (weld area) extremely easily and correctly.SOLUTION: Provided is the method for spot weld by using a fiber laser 12A, the fiber laser 12A is a laser in a single mode and forms a continuous waveform. A radiation position of the fiber laser 12A is for example, moved in a spiral state with a spot weld position 14A as a center, or is moved while drawing spiral so that diameter is expanded gradually from the center, for performing weld so as to make a weld area proper. |
