[기술논문] CO₂레이저를 이용한 용접튜브 제조공정에서의 용접선 추적 및 용접품질 모니터링

Weld quality monitoring and seam tracking along the butt-joint lengthwise to the tube axis are studied. The material of tube is 60kg/mm² grade steel sheet, and the longitudinal butt-joint is shaped by 2 roll bending machine. The tube with a thickness of I.5mm, diameter of 105.4mm and length of 2000mm is successfully obtained by the CO₂ laser welding system equipped with a seam tracker and plasma sensor. Experimental results show that the developed welding system can be used for the precision seam tracking and the real-time monitoring of weld quality, and the laser welded tube can be used for car body and component after tubular hydroforming.