ARC WELDING FOR WELDING STUD

PURPOSE: To provide a stud welding method usable on a thin sheet metal. CONSTITUTION: The method for welding a weld stud onto a base metal by a drawn arc is adopted. The weld stud is released from contact with the base metal by a return stroke and a pilot arc is generated. The weld stud is thereafte...

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Bibliographische Detailangaben
Hauptverfasser:	BUORUFUGANKU OOBERUMAN, HAARARUTO KUNETSUCHIE, BUORUFUGANKU SHIYUMITSUTO, KURAUSU GIISUBERUTO SHIYUMITSUTO
Format:	Patent
Sprache:	eng
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:	PURPOSE: To provide a stud welding method usable on a thin sheet metal. CONSTITUTION: The method for welding a weld stud onto a base metal by a drawn arc is adopted. The weld stud is released from contact with the base metal by a return stroke and a pilot arc is generated. The weld stud is thereafter returned toward the base metal in a forward stroke during the combustion of the welding arc. The welding arc is divided to plural current pulse trains by such current decreases as pulses toward the min. value. The last current pulse among these plural current pulses is expanded by at least about 1.5 times the current pulse preceding thereto and this expanded current pulse (P3) is continued nearly to the last of the forward stroke.