| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a quality inspection method for laser welding capable of inspecting lack of penetration. SOLUTION: In the quality inspection method for the laser welding, the light emission by a plasma plume of a plasma light generating on the surface of the work in the laser welding is inspected by a sensor 40, the frequency distribution obtained by analyzing the vibration of the inspected light is calculated, and on the basis of the signal strength in a frequency band of 0.6-1.5 KHz out of the calculated frequency distribution, the quality of the work is determined.</p> |
