Process Monitoring in Laser Welding with Photodiodes

광센서를 이용한 레이저용접공정 모니터링

  • 방세윤 (동국대학교 기계공학과) ;
  • 윤충섭 (한국기계연구원 용접자동화그룹)
  • Published : 1996.11.01

Abstract

Process monitoring in laser welding is essential for automation and quality control of products. Various signals from laser welding, such as plasma, sound, optical signals, etc., are utilized for monitoring the process and detecting abnormal weld conditions. In this study, both W light from plasma formed above the weld pool and IR signal from the melting pool are detected with photodiodes and PC-based A/D board, and analyzed to give a guidance about the weld quality. Experimental results show the possibility of using the signals for predicting and evaluating the weld qualify and adapting into the system for on-line process monitoring.

Keywords