| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance checking accuracy in a checking device for laser welding. SOLUTION: With this device, welding conditions of plural metallic plates are checked from a color tone on the other side of plural metallic plate polymers 1, to which lasers are radiated from one side A. On the other side of the polymers 1, whether laser welding is correctly performed or not is checked by a degree of occurrence of a portion where the color tone is changed. In this case, not the condition of a welding mark 7 is checked, but a peripheral portion where the welding mark 7 does not occur is checked. Thereby, checking is stabilized. As a result, checking accuracy of the laser welding condition can be heightened.</p> |
