Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Electric Resistance Double Spot Welding Process of Dissimilar Metal Plates of Steel and Aluminum by Using Heating Dies

가열금형을 사용하는 강철과 알루미늄 이종금속판재의 전기저항 이중스폿용접

  • Received : 2017.11.22
  • Accepted : 2018.01.05
  • Published : 2018.02.01
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Abstract

In this paper, a double spot welding process, utilizing electric resistance heating dies, is suggested for the spot welding of dissimilar metal plates for drawing and concurrent spot welding. This double welding process has two heating methods for the fusion welding at the interfacial zone between steel and aluminum plates, such as heating method by thermal conduction of electric resistance by welding current induced to heating dies, and heating method by electric resistance between contacted surfaces of two plates by welding current induced to copper electrode. This double welding process has welding variables such as each current induced in heating dies and in copper electrode, outer diameters of heating dies, and edge shape of copper electrode. Experiments for current conditions in welding process should be demanded in order to get successful welding strength. It was known that the welding strength could be reached to the value demanded on industry fields under such welding conditions as heating dies of outer ring dia.12mm contacted on steel plate, as heating dies of outer ring dia. 14mm contacted on aluminum plate, and as copper electrode of dia. 6.0mm, and as 3 times continuous heating method by $1^{st}$ current of 11 kA(9cycle), $2^{nd}$ current 11 kA(60cycle), $3^{rd}$ current 7 kA(60cycle) applied in steel heating dies and copper electrodes, flat edge of copper electrode, for double spot welding process of dissimilar metal plates of steel and aluminum of 1.0 mm thickness.

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References

  1. N. H. Kim, C. G. Kang, 2010, The Prediction of Interfacial Heat Transfer Coefficient According to Contact Time and Pressing in Forging and Casting Die Materials for the Hot Press Forming, Trans. Mater. Process, Vol. 19, No. 6, pp. 378-386. https://doi.org/10.5228/KSTP.2010.19.6.378
  2. H. Y, Ryu, Y. E. Kim, J. H. Kim, 2001, Improvement of Square Cup Drawability of Clad Sheet Metal by Warm Forming Technique, Trans. Mater. Process, Vol. 10, No. 3, pp.253-260.
  3. Y. H. Chung, K. K. Lee, J. Y. Suh, M. C. Shin, 2002,The Effect of Friction between Roll and STS on the roll Cladding Behavior of STS/AL/STS Sandwich Sheet, Trans. Mater. Process, Vol. 11, No. 6, pp. 482-486. https://doi.org/10.5228/KSPP.2002.11.6.482
  4. J. K. Kim, M. Y. Huh, K. K. Jee, 2004, Proc. Kor. Soc. Tech. Plast. Spring Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 221-224.
  5. H. G. Kang, J.S. Park, M. Y. Huh, S, H, Park, 2005, Proc. Kor. Soc. Tech. Plast. Spring Conf., Kor. Soc. Tech. Plast., Seoul, Korea, pp. 303-306.
  6. B. C Son, S. Y. Woo, J. B. Lee, Y. B. Choi, H. S. Chang, 1997, A Study on Resistance Spot Welding of Dissimilar Sheet Metals(Aluminum Alloy-Steel Sheets), J. Kor. Weld. Soc., Vol. 15, No. 4, August, pp. 268-288.
  7. B. J. Jo, J. S. Kim, H. S. Yoo, I. J. Kim, S. H. Lee, Y. G. Kim, 2015, Characterization of Spot welded Al5052/DP590 Dissimilar Materials and Processing Optimization, J. Weld. Join., Vol.33, No. 2, pp. 56-61. https://doi.org/10.5781/JWJ.2015.33.2.56
  8. R. F. Qiu, C. H. Iwamoto, S. B. Satonaka, 2009, Interfacial Microstructure and Strength of Steel/aluminum Alloy Joints Welded by Resistance Spot Welding with Cover Plate, J. Mater. Process. Technol., Vol. 209, No. 8, pp. 4186-4193. https://doi.org/10.1016/j.jmatprotec.2008.11.003
  9. T. H. Kim, I. T. Jin, 2017, Characteristics of Drawing and Concurrent Spot Welding of Overlapped Aluminum Plates with Copper Electrodes Inserted in Heated Dies, Trans. Mater. Process, Vol. 26, No. 3, pp. 174-180. https://doi.org/10.5228/KSTP.2017.26.3.174
  10. I. T. Jin, 2014, Spot Welding Machine with Auxiliary Heating Electrode and Spot Welding Method Using the Electrodes, Korea Patent, 10-1404288.