A Study on T-Joint Welding by High Power Fiber Laser of SAPH Steel Plate for Automobile

자동차용 강판 SAPH의 고출력 파이버 레이저에 의한 T형상 용접특성에 관한 연구

  • Oh, Yong-Seok (Department of Advanced Parts and Materials Engineering, Chosun University) ;
  • Yoo, Young-Tae (Department of Mechatronics Engineering, Chosun University) ;
  • Shin, Ho-Jun (Department of Precision Mechanical Engineering, Chosun University)
  • 오용석 (조선대학교 첨단부품 소재공학과) ;
  • 유영태 (조선대학교 메카트로닉스공학과) ;
  • 신호준 (조선대학교 정밀기계공학과)
  • Published : 2009.05.01

Abstract

The purpose of this paper is to describe experimental results about the T-joint welding of the high power continuous wave (CW) fiber laser for SAPH steel plate for seat frame of car. The seat rail is a part of seat frame of cars. The assembling method is mostly fix up using a bolt and nut. But this assembling method has many demerits in productivity such as increasing work process and material cost. This paper presents an experimental study about Laser T-Joint weldability of seat rail. Laser welding has many advantages in lightness and saving material costs of seat frame. The laser beam was moved along the work pieces by six axis robot with process optical fiber. The laser beam is focused with a welding head within incident angle $15{\sim}45^{\circ}$ for the purpose of the T-joint welding through two side full penetration. The range of the root gap size is less than ${\leq}0.4mm$. Optical microscopy SEM were performed to observe the micro structures and determine the structures of welded zone.

Keywords

References

  1. O. Svelto, Principles of Lasers, Springer, pp.365-415,1998
  2. B. Wedel, "Laser Processing Heads for Fiber Lasers Recent Developments for 10kW Laser power and Diffraction limited Beam Quality," 2nd International Workshop on Fiber Laser, 2006
  3. F. Bachmann and P. Soldan, "Status der BMBF joint Research Projects in the Field of Fiber Lasers," 2nd International Workshop on Fiber Laser, 2006
  4. Brose GmbH, Brochure for Japanese Market, www.brose.de. 2006
  5. D. H. Kim, Laser Manufacturing Technology, Kyungmoon, p.245, 1992
  6. 中井貞雄, Power Laser Technology, Ohmsha, p.92,1999
  7. J. F. Ready, LIA Hand Book of Laser Materials Processing, LIA-Magnolia Publishing Inc., p.319, 2001
  8. Y. T. Cho, S. J. Na, A Study on Analysis of Laser ARC Hybrid Plasma in Helium Gas, KWS, 2004
  9. J.M. Lim and 1. Jang, "The Strength Analysis of Passenger Car Seat Frame," Transactions of KSAE, VoUl, No.6, pp.205-212, 2003
  10. S.U. Yu, E.M. Jung, C.H. Jeong and W.K. Na, "A Study on the Optimization of Aluminum Seat Slider Rail," Fall Conference Proceedings, KSAE, pp.962-966, 2004