MONITORING DEVICE, METHOD, AND PROGRAM FOR SEAM WELDING, AND STORAGE MEDIUM

A monitoring apparatus for an electric resistance welding operation that forms a steel sheet continuously into a cylindrical shape while the sheet is transferred, and heats and melts both of a circumferential ends of the formed steel sheet converging in a V shape, and butts against each other, inclu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAMAMOTO, KAZUTO, HASEGAWA, NOBORU, NAKAJI, TOMOHIRO, KARUBE, YOSHIFUMI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PUNCHING METAL SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A monitoring apparatus for an electric resistance welding operation that forms a steel sheet continuously into a cylindrical shape while the sheet is transferred, and heats and melts both of a circumferential ends of the formed steel sheet converging in a V shape, and butts against each other, includes: a unit that obtains an image of a region including a Vee convergence section between both of the circumferential ends; either one of a unit that detects a contact point and a unit that detects a Vee convergence point; a unit that sets a temperature measurement region including a weld zone in which a fusion zone in an interior of the steel sheet begins to be discharged to a surface of the steel sheet; a unit that calculates a luminance level; a unit that converts the luminance level to temperature; and a unit that determines whether a temperature of the temperature measurement region is more than or equal to a predetermined lower limit value.