POST HEATING ANNEALING METHOD OF SPOT WELD PART AND LAP SPOT WELDING DEVICE

PURPOSE: To provide the post heating annealing method of spot weld part and lap spot welding device capable of in simple constitution, easily and effectively executing post heating annealing for spot welded part. CONSTITUTION: While all changeover switches 3b-3d, 4a-4c are set to ON, electric curren...

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Bibliographische Detailangaben
Hauptverfasser:	SEKINO YUTAKA, KAWAI YOSHITO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE: To provide the post heating annealing method of spot weld part and lap spot welding device capable of in simple constitution, easily and effectively executing post heating annealing for spot welded part. CONSTITUTION: While all changeover switches 3b-3d, 4a-4c are set to ON, electric current is caused to flow between each electrode facing each other (between 1a and 2a, etc.), spot welding is executed by contact resistance heating, subsequently, in completing spot welding, all changeover switches is switched to OFF, an electricity conducting circuit is switched so that electric current is caused to flow in the direction of arrow A. As a result, the impedance suitable for executing post heating annealing is obtained, the electricity conducting region between both electrodes 1a, 2d is resistance heated. Thus, each spot weld part located in the electricity conducting region is subjected to post heating annealing.