전류 파형 제어를 적용한 마그네슘 합금의 저항 점 용접 특성 (Resistance Spot Welding Characteristics of Mg Alloy Applying Current Waveform Control)

서지정보

· 발행기관 : 대한용접접합학회
· 수록지 정보 : 대한용접접합학회지 / 32권 / 2호 / 70 ~ 75페이지
· 저자명 : 최동순, 황인성, 김동철, 류재욱, 강문진

초록

In automotive industry, applying of Mg alloy to autobody has been issued recently as a light metal. Butpoor resistance spot weldability of Mg alloy is blocking commercialization. So studies on improving resistancespot weldability of Mg alloy is increasing continuously. For reduce loss of heat input during welding, inverterDC power source is considered because of short rise time to target welding current. But rapid rising of weldingcurrent can increase temperature rapidly in nugget and oxide film between electrode and base metal, andthat causes generating expulsion on low welding current range.
In this study, for increase optimum welding current range and prevent generating expulsion, applicatevarious types of welding current waveform controls during resistance spot welding. For analysis effects of eachcurrent waveform control, acceptable welding current regions according to electrode force and welding timeis determined and lobe diagram is derived. In result, pre heat is proposed as optimum type of welding currentwaveform control.

영어초록

In automotive industry, applying of Mg alloy to autobody has been issued recently as a light metal. Butpoor resistance spot weldability of Mg alloy is blocking commercialization. So studies on improving resistancespot weldability of Mg alloy is increasing continuously. For reduce loss of heat input during welding, inverterDC power source is considered because of short rise time to target welding current. But rapid rising of weldingcurrent can increase temperature rapidly in nugget and oxide film between electrode and base metal, andthat causes generating expulsion on low welding current range.
In this study, for increase optimum welding current range and prevent generating expulsion, applicatevarious types of welding current waveform controls during resistance spot welding. For analysis effects of eachcurrent waveform control, acceptable welding current regions according to electrode force and welding timeis determined and lobe diagram is derived. In result, pre heat is proposed as optimum type of welding currentwaveform control.

참고자료

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