Method for detecting arc weld faults

Weld quality is determined during the welding process involving a power/current source (22), a welding electrode, a base plate (26) and an electric circuit. The method includes the following steps: (a) sampling of a signal produced by the electrical circuit; (b) determination of the standard deviati...

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Hauptverfasser:	LUDEWIG, HOWARD W., GROVELAND, ILL., US, HAYTCHER, STEPHEN A., PEORIA, ILL., US, REES, DEAN E., MARQUETTE HEIGHTS, ILL., US, KILTY, ALAN L., PEORIA, ILL., US, WALLACE, BRIAN L., PEORIA HEIGHTS, ILL., US, SIWICKE, JAMES H., MONTERREY, MX
Format:	Patent
Sprache:	eng ; 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:	Weld quality is determined during the welding process involving a power/current source (22), a welding electrode, a base plate (26) and an electric circuit. The method includes the following steps: (a) sampling of a signal produced by the electrical circuit; (b) determination of the standard deviation of this signal over a given period; (c) comparison of the standard deviation with a first predetermined limit, and stopping of the welding process if this limit is exceeded; (d) comparison of the standard deviation with a second predetermined limit below the first limit, and continuation of the welding process if this limit is exceeded.