ARC WELDING EQUIPMENT AND ITS FAULT DETECTION METHOD

PROBLEM TO BE SOLVED: To provide an arc welding equipment that can ensure successful operation of equipment by facilitating detection of short-circuit failure. SOLUTION: Before applying arc welding treatment, a base material 5 or a tool 7 is brought into contact with a welding wire 17, with an elect...

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Bibliographische Detailangaben
1. Verfasser:	NOJIRI KEISUKE
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CLADDING OR PLATING BY SOLDERING OR WELDING CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRICITY GENERATION 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:	PROBLEM TO BE SOLVED: To provide an arc welding equipment that can ensure successful operation of equipment by facilitating detection of short-circuit failure. SOLUTION: Before applying arc welding treatment, a base material 5 or a tool 7 is brought into contact with a welding wire 17, with an electric current flowing in a welding circuit 25 measured. This measured current IK is compared with a reference current I0 for discrimination which is predetermined corresponding to the welding circuit 25, thereby discriminating the presence/absence of a short-circuit between the welding circuit 25 and a tool control circuit 12. If occurrence of a short-circuit failure is discriminated, the process is prevented from shifting to the arc welding treatment. Accordingly, burning of control equipment or electric wire that may occur when arc welding treatment is carried out without knowing the occurrence of the short-circuit failure can be surely avoided. COPYRIGHT: (C)2008,JPO&INPIT