연강 판재의 맞대기 용접에서 아크에 작용하는 자기력의 해석

Analysis of Electro-Magnetic Force Acting on Arc Column in Butt-Joint Welding of Mild Steel Plate

  • 배강열 (진주산업대학교 메카트로닉스공학과)
  • Bae Kang-Yul (Dept. of Mechatronics Engineering, Jinju National University)
  • 발행 : 2005.08.01

초록

Arc blow being occurred by Electro-Magnetic force(EMF) during the electric arc welding prevents the formation of a sound weldment. In this study, the effects of arc position, groove size, tack weld and base plate on the EMF in a butt-joint welding of mild steel plate are analyzed by a computer simulation based on the finite element method. The EMF can be numerically identified to be caused by a difference of the magnetic flux-density between ahead of and behind the arc in case that the workpiece locates asymmetrically around the uc. When there exists an air gap of groove ahead of the arc in the welding direction, the similar magnetic force has been producted regardless of the arc position and the gap size. The tack weld alleviates the magnetic force to about one fourth at the finish end of the workpiece. The magnetic force can be also significantly reduced with the base plate to about one fifth at the start end of the workpiece containing a tack weld.

키워드

참고문헌

  1. Lincoln Electric Co. : Prevent Arc Blow When Welding, Metal Forming-Richmond Heights then Independence, 35-5 (2001), 42-46
  2. American Welding Society : Fundamentals of Welding, 1975, 56-59
  3. J. F. Lancaster : Metallurgy of Welding (4th Edition), 1980, 31-50
  4. E. Halmoy : A Cause of Arc Blow, Welding Journal, 61-9 (1982), 43-47
  5. D. Schaffer : Attacking Arc Blow, Welding Journal, 78-4 (1999), 47
  6. Y. Wang and H. L. Tsai : Impingement of Filler Droplets and Weld Pool Dynamics during Gas Metal Arc Welding Process, International Journal of Heat and Mass Transfer, 44-11 (2001), 2067-2080 https://doi.org/10.1016/S0017-9310(00)00252-0
  7. I.-S. Kim and A. Basu : A Mathematical Model of Heat Transfer and Fluid Flow in the Gas Metal Arc Welding Process, Journal of Materials Processing Technology, 77-3 (1998), 17-24 https://doi.org/10.1016/S0924-0136(97)00383-X
  8. Vector Field Inc. : PC-OPERA, 2000
  9. J. Jianming : The Flnite Element Method in Electromagnetics, John Wiley and Sons, 1993
  10. J.-G. Kang, J.-H. Lee and J.-G. Shin : Numerical Analysis of Induction Heating for the Application of Line Heating, Journal of the Society of Naval Architects of Korea, 37-3 (2000), 110-121 (in Korean)
  11. Y.-K. Kim : Electro-Magnetics, Daeyoung, Seoul, Korea, 1992, 126-134 (in Korean)
  12. S.-W. Park and S.-J. Na : A New Current Measurement Method in Resistance Spot Welding, IEEE Trans. on Instrument and Measurement, 39-5 (1990), 767-772 https://doi.org/10.1109/19.58623
  13. S.-Y. Han : Introduction to Electronic and Electric Engineering, Daeyoung, Seoul, Korea, 1996, 275-277 (in Korean)