[ 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

신승철^a ; 진병주^a^{, *} ; 정우현^b

Development of GMAW Contact Tips Via Intubation of Wear-resistant Material

Shin, Seung-Cheol^a ; Jin, Byeong-Ju^a^{, *} ; Gung, Woo-Hyun^b

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’)

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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