자동차용 박강판 겹치기 이음부의 CO₂ 아크 용접에서 다중회귀분석기법을 이용한 용입깊이 예측에 대한 연구

이경민; 심현우; 권재형; 윤북동; 정민기; 박문수; 이보영

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자료유형: 학술저널

저자정보: 이경민 (한국항공대학교) 심현우 (한국항공대학교) 권재형 (한국항공대학교) 윤북동 (광주기아자동차) 정민기 (광주기아자동차) 박문수 (현대NGV) 이보영 (한국항공대학교)

저널정보: 대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌第30卷第2號

발행연도: 2012.4

수록면: 59 - 64 (6page)

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Welding is an essential process in the automotive industry. Most welding processes that are used for auto body are spot welding and CO₂ welding are used in a small part. In production field, CO₂ welding process is decreased and spot welding process is increased due to welding quality is poor and defects are occurred in CO₂ welding process frequently. But CO₂ welding process should be used at robot interference parts and closed parts where spot welding couldn’t. Because of the 0.65㎜ ~ 2.0㎜ thickness steel sheet were used in the automotive industry, poor quality of welding area such as burn through and under fill were happened frequently in CO₂ process.
In this paper, we will study about the penetration depth which gives a huge impact on burn through changing a degree of base metal, welding position and torch angle. Voltage, current and welding speed were fixed but degree of base metal, welding position and torch angle were changed. And Cold-Rolled(CR) steel sheet was used. Penetration depth was analysed by multiple regression analysis to derive approximate calculations. And reliability of approximate calculations were confirmed through additional experiments. As the results of this research, we confirmed the effect of torch and plate angle to bead shape. And we present a possibility that can simulate more accurate to weld geometry, as deduced the verification equations that has tolerance of less than 21.69%.

#Welding position #Angle of plate #Torch angle #Penetration depth #Multiple regression analysis

참고문헌 (13)

참고문헌 신청

Bub-Hun Kim / 2011 / Inspection about Influences on the Weld Parts through the Change of the Position of Welding Torch and the Voltage During CO Welding / J. Korean Society of Industrial Application 14(2):59~65

최동순 / 2009 / STS429L 겹침 용접부의 파단 특성에 관한 연구 / 대한용접접합학회지 27(5):49~54

김일수 / 2008 / GMA 용접공정에서 공정변수 선정을 위한 민감도 분석에 관한 연구 / 한국생산제조시스템학회지 17(5):30~35

Hyunsung Park / 1999 / Estimation of CO2 Laser Weld Bead by Using Multiple Regression / Journal of KWS 17(3):26~35

김재성 / 2010 / 자동차 차체 수직용접자세에 대한 최적 용접방법에 관한 연구 / 대한용접접합학회지 28(6):10~14