RESISTANCE SPOT WELDING METHOD AND METHOD FOR MANUFACTURING WELDED MEMBER

A resistance spot welding method comprises: performing test welding; and performing actual welding after the test welding, wherein in the test welding, 0.2 ≤ Vtp/Vtm ≤ 1.5 is satisfied where Vtm is an average value of a voltage between the electrodes in main current passage in the test welding and V...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUDA, Hiroshi, IKEDA, Rinsei, SAWANISHI, Chikaumi
Format:	Patent
Sprache:	eng ; fre ; ger
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:	A resistance spot welding method comprises: performing test welding; and performing actual welding after the test welding, wherein in the test welding, 0.2 ≤ Vtp/Vtm ≤ 1.5 is satisfied where Vtm is an average value of a voltage between the electrodes in main current passage in the test welding and Vtp is an average value of a voltage between the electrodes in subsequent current passage in the test welding, and in each of main current passage and subsequent current passage in the actual welding, a time variation curve of an instantaneous amount of heat generated per unit volume and a cumulative amount of heat generated per unit volume that are stored in a corresponding one of the main current passage and the subsequent current passage in the test welding are set as a target, and adaptive control welding is performed to control a current passage amount according to the target.