지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 조상명
- 발행연도
- 2015
- 저작권
- 부경대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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TIG welding is today one of the most popular arc welding process because of its high quality welds and low equipment costs. This is necessary welding process in industry fields. But TIG welding has limited application because of low productivity.
Even if welding productivity increases with welding speed and current, this strategy is limited by the appearance of defects such as undercut and humping bead due to a very depressed molten metal by arc pressure at high current and high speed. Humping in one of the most common defects that limit welding productivity. Most industry fields needed high-current, high-speed welding do not trying to TIG welding. Therefore We need a study on application methodology of high current, high speed TIG welding.
The purpose of this study is to develop high-speed welding process by Super_TIG welding that overcame TIG productivity. High-speed Super_TIG welding Experiment of this study was proceed on thickness 16mm SS400. Deposited area was fixed 20mm2. Welding speed was changed from 60cm/min to 130cm/min. Also Shield gas was changed Ar 100%, Ar-He 30%, Ar H2 3%.
Consequently, this study obtained good bead appearance and welds by Welding speed 130cm/min, Deposition rate 12.5kg/hr, deposited area 20mm2.
Even if welding productivity increases with welding speed and current, this strategy is limited by the appearance of defects such as undercut and humping bead due to a very depressed molten metal by arc pressure at high current and high speed. Humping in one of the most common defects that limit welding productivity. Most industry fields needed high-current, high-speed welding do not trying to TIG welding. Therefore We need a study on application methodology of high current, high speed TIG welding.
The purpose of this study is to develop high-speed welding process by Super_TIG welding that overcame TIG productivity. High-speed Super_TIG welding Experiment of this study was proceed on thickness 16mm SS400. Deposited area was fixed 20mm2. Welding speed was changed from 60cm/min to 130cm/min. Also Shield gas was changed Ar 100%, Ar-He 30%, Ar H2 3%.
Consequently, this study obtained good bead appearance and welds by Welding speed 130cm/min, Deposition rate 12.5kg/hr, deposited area 20mm2.
목차
Abstract ······························································································ ⅲ제 1 장 서 론 ························································································ 1 1.1 연구 배경 및 필요성 ····································································· 11.2 연구 목적 및 개요 ········································································ 4제 2 장 이론적 배경 ··············································································· 52.1 TIG(tungsten inert gas) 용접 ························································ 52.1.1 GTAW의 원리 ··········································································· 52.1.2 GTAW의 장단점 ········································································ 62.2 GTAW 용접기 및 재료 ··································································· 72.2.1 용접기 ····················································································· 82.2.2 용접토치 ················································································ 102.2.3 전극봉 및 보호가스 ································································· 112.3 TIG 고속용접(High speed TIG welding)·········································· 132.4 TIG 용접의 용가재 송급속도에 따른 용가재투입열량 ······················ 162.5 플라즈마 스트림의 법선면 도출······················································· 172.5.1 플라즈마 스트림 이론 관점에서 본 Super_TIG ························· 22제 3 장 Super_TIG 고속용접에서 용접속도 변경 실험······························ 233.1 서언 ·························································································· 233.2 실험 재료 및 방법 ······································································ 233.2.1 실험 재료 ·············································································· 233.2.2 실험 방법 ·············································································· 253.3 실험결과 및 고찰 ········································································ 283.4 결언 ·························································································· 33제 4 장 Super_TIG 고속용접에서 실드가스 변경 실험···························· 344.1 서 론 ························································································ 344.1.1 연구 배경 및 필요성 ······························································ 344.1.2 연구 목적 및 개요 ································································· 344.1.3 실험재료 및 실험방법 ····························································· 354.1.4 실험결과 및 고찰 ··································································· 374.2 결언 ·························································································· 45제 5 장 결론 ······················································································ 46참고문헌 ····························································································· 47
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