한국생산제조학회 학술지 영문 홈페이지
[ Article ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33, No. 2, pp.92-98
ISSN: 2508-5107 (Online)
Print publication date 15 Apr 2024
Received 08 Feb 2024 Revised 07 Mar 2024 Accepted 08 Mar 2024
DOI: https://doi.org/10.7735/ksmte.2024.33.2.92

내마모성 소재 삽관을 통한 GMAW 콘택트 팁 개발

신승철a ; 진병주a, * ; 정우현b
Development of GMAW Contact Tips Via Intubation of Wear-resistant Material
Seung-Cheol Shina ; Byeong-Ju Jina, * ; Woo-Hyun Gungb
aSmart Manufacturing Engineering Group, Institute for Advanced Engineering
bCo. World S

Correspondence to: *Tel.: +82-31-330-7366 E-mail address: bjjin@iae.re.kr (Byeong-Ju Jin).

Abstract

In gas metal arc welding (GMAW), contact tips are used to transmit current to a wire and guide it into a molten pool. Once the tip is used for a long period, it becomes worn out, and the hole size of the contact tip increases. This causes wire mispositioning during welding, thus resulting in a deviation in the weld line (or an unstable arc), which is a welding defect. Therefore, worn contact tips should be replaced with new ones occasionally. Frequently repeated contact-tip replacement decreases welding productivity. In this study, a new type of contact tip is developed, in which a tube fabricated using STS 304 is inserted by expanding the hole inside a normal contact tip. The newly developed contact tip is used in GMAW, which allows continuous welding. Results show that its wear resistance and durability are better than those of a normal tip, thus confirming its longer lifetime.

Keywords:

Contact tip, Wear resistance, Wear rate, GMAW

Acknowledgments

이 연구는 2021년도 산업통상자원부 및 산업기술평가관리원(KEIT) 연구비 지원에 의한 연구임(‘20014618’)

References

  • Kim, H. J., Kim, N. H., Ryoo, H. S., Koh, J. H., 2003, Reliability of Contact Tip for Gas Metal Arc Welding, Journal of Welding and Joining, 21:7 9-17.
  • Kim, N. H., Kim, K. H., Kim, H. J., Ryoo, H. S., Koh, J. H., 2004, Variation of Microstructure and Hardness of Contact Tips during GMA Welding, Journal of Welding and Joining, 22:1 43-49.
  • Koh, J. H., Kim, N. H., Kim, H. T., Hwang, Y. H., 2011, Effect of the Wear of Contact Tips on the Weld beads made by GMAW Process, Journal of the Korea Academia-Industrial cooperation Society, 12:5 2019-2024. [https://doi.org/10.5762/KAIS.2011.12.5.2019]
  • Kim, N. H., Kim, H. J., Ryoo, H. S., Koh, J. H., 2004, Prediction on the Wear Resistance of Contact Tips for GMA Welding, Journal of Welding and Joining, 22:4 35-42.
  • Kim, H. J., 1993, Trend of Welding Technologies for Improving Productivity, Journal of Welding and Joining, 11:4 1-9.
  • Villafuerte, J., 1999, Understanding Contact Tip Longevity for Gas Metal Arc Welding, Welding Journal, 78:12 29-35.
  • Adam, G., Siewert T. A., Quinn T. P., Vigliotti, D. P., 2001, Contact Tube Temperature during GMAW, Welding Journal, December 2001, 37-41.
  • Kim, N. H., Kim, H. J., Ryoo, H. S., 2005, Life Time Prediction of Contact Tips for GMA Welding, Journal of Welding and Joining, 23:4 1-6.
  • Kim, H. J., Yoo, H. S., Kim, N. H., 2006, Self-Controlled Contact Tips for Automatic Welding, KR Patent: 10-2004-0085595.
  • RS, 2004, Contact Tip for Gas Metal Arc Welding, RS D 0031, Korea Reliability Certification Center, Korea.
Seung-Cheol Shin

A Researcher at the Institute for Advanced Technology. His research interest is Welding.

E-mail: shin950925@iae.re.kr

Byeong-Ju Jin

A Senior Researcher at the Institute for Advanced Technology. His research interest is Welding.

E-mail: bjjin@iae.re.kr

Woo-Hyun Gung

CEO of Liebeko co., Ltd. His research interest is Welding Metallurgy.

E-mail: sendung@daum.net