Laser Solutions (한국레이저가공학회지)

Korean Society of Laser Processing (한국레이저가공학회)
권호 표지

Analysis on behavior of keyhole and plasma using photodiode in laser welding of aluminum 6000 alloy

포토 다이오드를 이용한 6000계열 알루미늄 합금의 레이저 용접에서 키홀 및 플라즈마의 거동 해석

  • Park Y. W. (Department of Precision Mechanical Engineering, Hanyang University) ;
  • Park H. S. (Body Manufacturing Engineering Team, Kia Motors) ;
  • Rhee S. H. (School of Mechanical Engineering, Hanyang University)
  • 박영환 (한양대학교 정밀기계공학과) ;
  • 박현성 (기아자동차 (주) 차체생기팀) ;
  • 이세헌 (한양대학교 기계공학부)
  • Published : 2004.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In automotive industry, light weight vehicle is one of issues because of the air pollution and the protection of environment. Therefore, automotive manufacturers have tried to apply light materials such as aluminum to car body. Aluminum welding using laser has some advantages high energy density and high productivity. It is very important to understand behavior of plasma and keyhole in order to improve weld quality and monitor the weld state. In this study, spectral analysis was carried out to verify the spectrum for plasma which is generated in laser welding of A 6000 aluminum alloy. Two photodiodes which cover the range of plasma wavelength was used to measure light emission during laser welding according to assist gas flow rate and welding speed. Analysis of relationship between sensor signals of welding variables and formation of keyhole and plasma is performed. To determine the level of significance, analysis of variation (ANOVA) was carried out.

Keywords