내마모성 소재 삽관을 통한 GMAW 콘택트 팁 개발

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 devia...

Full description

Saved in:
Bibliographic Details
Published in한국생산제조학회지 Vol. 33; no. 2; pp. 92 - 98
Main Authors 신승철(Seung-Cheol Shin), 진병주(Byeong-Ju Jin), 정우현(Woo-Hyun Gung)
Format Journal Article
LanguageKorean
Published 한국생산제조학회 01.04.2024
Subjects
기계공학
Contact tip
Wear resistance
Wear rate
GMAW
Online AccessGet full text
ISSN2508-5093
2508-5107
DOI10.7735/ksmte.2024.33.2.92

Cover

More Information
Summary: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. KCI Citation Count: 0
ISSN:2508-5093
2508-5107
DOI:10.7735/ksmte.2024.33.2.92