Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Calculating Method of the Heat Input Efficiency in Arcspot Welding

아크 스폿 용접의 입열효율 계산 방법에 관한 연구

  • 장경복 (삼성중공업(주) 거제조선소 조선플랜트연구소) ;
  • 조상명 (부경대학교 재료공학부 생산가공공학)
  • Published : 2003.07.01
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Abstract

In arc spot welding process, the arc is not moving and heat input is concentrated in one spot so that the heat input efficiency of arc is higher than that of GMAW. In other words, the heat input efficiency of arc change during weld time because arc start is done in spot and weld metal is filled. Therefore, the heat input model of arc spot welding should be different from that of general GMAW. In present study, the calculating model of heat input efficiency in arc spot welding was suggested by temperature monitoring near spot in arc spot welding of copper plate. The result showed that the heat input efficiency of arc was changed three times during weld time. The accuracy of calculating method of heat input efficiency was verified by heat transfer analysis of arc spot welding process using finite element method.

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References

  1. 現代自動車(株), 1988, '電氣抵抗熔接,' pp. 3-60
  2. 英國熔接學會, 1984, '自動 炭酸가스 熔接'
  3. W. P. Blankenship, etc., 1983 'Evaluation of GMA Spot Welding for Assembly of High Performance Sheet Steel Structure,' Welding Journal, March, pp. 27-33
  4. 小野英彦, 1982, '鋼のCO2 ア-クスポット 熔接(第1報),' 熔接學會誌, 第51卷, 第7？ pp. 604-609
  5. M.S Han, J.M Han, J.Y Lee, 1997, 'A Study on the Bending Strength of a Built-up Beam Fabricated by the $CO_2$ Arc Spot Welding Method,' Journal of KWS, Vol. 15, No.4, pp. 369-379
  6. O. W. Blodgett, 1987, 'Calculating Cooling Rates of Arc Spot Welds,' Welding Journal, December, pp. 17-31
  7. T. Muraki, J.J. Bryan, and K. Masubuchi, 1975, 'Analysis of Thermal Stresses and Metal Movement During Welding,' Journal of Eng. Materials and Tech. ASME, pp. 81-91
  8. H.D. Hibbit, and P.V. Marcal, 1973, 'A Numerial Thermo-mechanical Model for the Welding and Subsequent Loading of a Fabricated Structure,' Computers and Structure, pp. 1145-1174 https://doi.org/10.1016/0045-7949(73)90043-6
  9. R.E. Nickell, and H.D. Hibbit, 1975, 'Thermo-mechanical Analysis of Welded Structures,' Nuclear Eng. and Design, pp. 110-120 https://doi.org/10.1016/0029-5493(75)90093-X
  10. E. Friedman, 'Thermo-mechanical Analysis of the Welding Process Using the Finite Element Method,' Journal of Press. Vesel Tech. ASME, Series J, 97(3), (1975), pp. 206-213 https://doi.org/10.1115/1.3454296
  11. J.K. Hwang, K.B Jang, S.S Kang, 1998, 'A Study on the Weldability of 304 stainless steel,' Journal of KWS, Vol. 16, No. 1
  12. J.K. Hwang, K.B Jang, S.S Kang, 1999, 'Prediction of Nugget Shape by Finite Element Modeling in Arc-spot Welding,' Journal of KWS, Vol. 17, No. 2