Abstract
The method of the quality control in the laser welding has various techniques. The laser welding monitor system is one of the many kinds of technique concerning of quality control, and is marketed. However, it is necessary not only to manage in-process in the welding system but also to manage pre-process and post-process to control welding quality. Therefore, the management of the welding quality needs the monitoring in the above method. As the first, the condition monitoring technique uses the waveform analysis of the optical intensity in in-process of the laser welding process. In this report, the application experience to the half penetration welding with the YAG laser for thin stainless steel sheets is discussed.
