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A Experiment Study on Selection the Optimal Condition for GMA Root-pass Welding in Overhead and Vertical Position

GMA 위보기 및 수직자세 초층용접 최적조건 선정에 관한 실험적 연구

  • Kim, Ji-Sun (Green mold Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, In-Ju (Green mold Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Ill-Soo (Department of Mechanical Engineering, Mokpo Univ.)
  • 김지선 (한국생산기술연구원 그린몰드기술센터) ;
  • 김인주 (한국생산기술연구원 그린몰드기술센터) ;
  • 김일수 (목포대학교 기계공학과)
  • Received : 2012.09.05
  • Accepted : 2012.12.07
  • Published : 2012.12.31

Abstract

Due to increase in demand of stable and long pipelines in natural gas industry, wide range of researches are being performed on automation welding to improved welding quality with respect to weld process parameters in real time measurement. In particular, the coupling between the pipe manufacturing process and location of the weld seam, the measured size of the gap that exists in the weld position and the weld angle depending on whether the movement of molten weld. This is due to absence of controlling welding penetration position, depending on the required size of the angle of the setting. In addition, the optimum welding conditions must be considered while selecting, the correlation between these variables and the systematic correlation has not yet been identified. Therefore, in most welded pipe root-pass weld solely depends on the experience of workers in relation to secure a stable weld quality. In this study, automation welding system is implemented to select a suitable root-pass STT (Surface Tension Transfer) welding method using the optimal welding conditions. To successfully accomplish this objective, there were various welding conditions used for welding experiment to confirm that the assessment required for construction through the pipe and automatic welding process is proposed to optimize this plan.

Keywords

References

  1. S. B. Jones, : Process Tolerance in Submerged Arc Welding, Weld. Inst. Research Report 1, 1976
  2. W. S. Kim, Y. P. Kim, C. M. Kim and J. H. Baek. : Comparison for grth auto welding procedure of field construction of gas pipeline, Journal of KWS, 21-3 (2003), 105-108, (in Korean),
  3. W. S. Chang, M. Y. Lee, and B. Y. Yoon, : High current keyhole GTAW for stainless Steels and ti alloys. Journal of KWS, 22-6 (2004), 6-9, (in Korean)
  4. R. S. Ha, B. H. Jung, and H. S. Park : Structure and defects in welds of high strengths al alloys by using GTAW. Journal of KWS, 21-5 (2003), 540-546, (in Korean)
  5. R. S. Chandel, : Mathematical Modeling of Gas Metal Arc Weld Features", Proceedings of the Fourth International Conference on Modeling of Casting and Welding Processes, 1988, 109-120, (in Korean)
  6. T. Shinoda and J. Doherty : The Relationships Between Arc Welding Parameters and Weld Bead Geometry, The Welding Institute Report 74, 1978 (in Germany)
  7. D.C. Kim and S. H. Rhee, : Design of an Optimal Fuzzy Logic Controller Using Response Surface Methodology, IEEE Trans on Fuzzy systems, 9-3 (2001), 404-412 https://doi.org/10.1109/91.928737
  8. H. S. Park, T. H. Kim, and S. H. Rhee, : Optimization of Welding Parameters for Resistance Spot Welding of TRIP Steel Using Response Surface Methodology, Journal of KWS, 21-2 (2003), 76-81 (in Korean)
  9. J. Y. Lee, J. W. Kim, and C. H. Kim, : A study on the selection of fillet weld conditions by considering the tack welds, Journal of KWS, 24-5 (2006), 377-384, (in Korean)