Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of the Wear of Contact Tips on the Weld beads made by GMAW Process

GMA용접 공정에서 콘택트팁 마모가 용접비드에 미치는 영향

  • Koh, Jin-Hyun (Department of Materials Engineering, Korea University of Technology & Education) ;
  • Kim, Nam-Hoon (Department of Materials Engineering, Korea University of Technology & Education) ;
  • Kim, Hwan-Tea (ReSeat Program, Korea Institute of Science and Technology Information) ;
  • Hwang, Yong-Hwa (PIE & Radwaste Division, Korea Atomic Energy Research Institute)
  • 고진현 (한국기술교육대학교 신소재공학과) ;
  • 김남훈 (한국기술교육대학교 신소재공학과) ;
  • 김환태 (한국과학기술정보연구원 전문연구위원) ;
  • 황용화 (한국원자력연구원 조사시험부)
  • Received : 2011.03.14
  • Accepted : 2011.05.12
  • Published : 2011.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of the wear of contact tips on the weld beads made by a Gas Metal Arc Welding(GMAW) process was studied. In order to correlate between the wear of tips and beads, the droplet transfer was investigated by a high speed camera and waveform shapes, and the condition of beads was examined by a low magnification camera as well. It was found that the worn contact tip had caused to shift the contact point between the tip and the welding wire which resulted in nonuniform beads. In addition, the worn contact tip had changed the welding resistance and brought about the arc instability during welding.

GMA용접 공정에서 콘택트팁의 마모가 용접비드에 미치는 영향에 대해서 연구하였다. 콘택트팁과 용접비드 사이의 연관성을 조사하기 위하여 초고속 카메라와 파형분석을 이용하여 용적이행을 관찰하였고, 저 배율의 카메라로 비드의 상태를 관찰하였다. 콘택드팁의 마모는 팁과 용접와이어 사이의 접촉 지점을 변화시켜 결과적으로 불규칙비드를 생성하였다. 이것은 마모된 콘택트팁이 용접시 용접저항의 변화를 초래하여 용접아크 불안정의 원인이 되기 때문이다.

Keywords

References

  1. H. J. Kim N. H. Kim, H. S. Kim, and J. H. Koh: Reliability of Contact Tip for Gas Metal Arc Welding, Journal of KWS, 21-7(2003) 9-17 (in Korean).
  2. N. H. Kim, J. H. Kim, H. J. Kim, H. S. Kim, and J. H. Koh: Variation of Microstructure and Hardness of Contact Tips during GMA Welding , Journal of KWS, 22-1(2004) 43-49 (in Korean).
  3. N. H. Kim, J. H. Kim, H. J. Kim, H. S. Kim, and J. H. Koh: Prediction on the Wear Resistance of Contact Tips for GMA Welding, Journal of KWS, 22-4(2004) 35-42 (in Korean).
  4. J. F. Rudy, D. C. Brown and W. G. Groth: Study of current contact tubes for gas metal arc welding. Welding Research Supplement. 8(1996). p374-378
  5. RS D 0031: Contact Tip for Gas Metal Arc Welding. 2004(in korean)
  6. T. Yamada and O Tanaka: Fluctuation of the Wire Feeding Rate in Gas Metal Arc Welding. Welding Journal, 9(1987), 35-42
  7. V. G. Degtyarev, M. P Novikov and N. M. Voropal: Improving the working condition of the electrode wire-contact tip pair. Paton Welding Journal, 1991, 3(4). p290-294
  8. V. G. Degtyarev, M. P. Novikov and N. M. Voropai: Paton Welding Journal, 3(1991), 290
  9. T. P. Quinn, R. B. Madigan, M. A. Mornis and T. A. Siewert: Contact tube wear detection in gas metal arc welding, Welding Journal, 74(1995), 115.s