METHOD FOR RESISTANCE SPOT WELDING OF STEEL SHEET

Disclosed is a method for spot welding a steel sheet. In one embodiment, the spot welding method of the steel sheet comprises steps of: pressing a pair of electrodes in contact with the upper and lower portions of a weld target portion of the steel sheet to be joined; applying and maintaining a firs...

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Bibliographische Detailangaben
Hauptverfasser:	LEE CHANG YONG, KWON TAE WOO, YOOK WAN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Disclosed is a method for spot welding a steel sheet. In one embodiment, the spot welding method of the steel sheet comprises steps of: pressing a pair of electrodes in contact with the upper and lower portions of a weld target portion of the steel sheet to be joined; applying and maintaining a first energization current value (I1) to the weld target portion while maintaining the pressure of the electrode to conduct primary energization; and performing secondary energization by increasing and maintaining the current with a slope from the first energization current value (I1) to a second energization current value (I2) while maintaining the pressurization. 강판의 점용접 방법과 관련한 발명이 개시된다. 한 구체예에서 상기강판의 점용접 방법은 피접합강판 용접대상부위의 상부와 하부에 한 쌍의 전극을 접촉하여 가압하는 단계; 상기 전극의 가압을 유지하면서, 상기 용접대상부위에 제1 통전전류값(I1)을 인가하고 유지하여 1차 통전을 실시하는 단계; 및 상기 가압을 유지하면서, 제1 통전전류값(I1)에서 제2 통전전류값(I2)까지 전류를 기울기를 가지며 증가시키고 유지하여 2차 통전을 실시하는 단계;를 포함한다.