플라즈마를 이용한 레이저 용접 공정 모니터링

Laser Welding Process Monitoring using Plasma Intensity

  This paper describes the evaluation methods of welding qualities in manufacturing the laser welding parts for automobile body. After and during laser welding the qualities of welding parts is studied to estimate the defects of welding parts. The welding qualities are evaluated from the intensities of plasma generated during welding. The plasma detector is consisted of UV and IR sensor. The first research is carried out in case of the CO₂ laser welding. With this results the research about Nd:YAG laser welding is done and continuously been doing in case of Nd:YAG laser welding with high power. This research and the developed plasma sensor could be applied the evaluation of laser welding quality.