VERFAHREN UND VORRICHTUNG ZUR UEBERWACHUNG UND/ODER REGELUNG DES SCHWEISSSTROMES BEIM HOCHFREQUENZWIDERSTANDSPRESSSCHWEISSEN VON LAENGSNAHTROHREN

It is necessary to determine welding temperature as precisely as possible in order to properly control the high-frequency welding of longitudinal pipes. Changes in welding temperature are proportional to alterations in the welding current that flows through the edges of the skelp. Magnetic-field sen...

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Bibliographische Detailangaben
Hauptverfasser:	STRAUCH,HEINZ, WAHL,HANS-JUERGEN, KREBS,ROLF, KOCH,FRIEDRICH-OTTO, SCHORR,PETER, KLIESCH,WILFRIED
Format:	Patent
Sprache:	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:	It is necessary to determine welding temperature as precisely as possible in order to properly control the high-frequency welding of longitudinal pipes. Changes in welding temperature are proportional to alterations in the welding current that flows through the edges of the skelp. Magnetic-field sensors can be used to directly and precisely determine alterations in the current and hence changes in the temperature. Voltages induced in the sensors can be processed into setting signals to correct the high-frequency welding generator and disruptions in the current used to generate signals to mark the site of failure on the pipe for subsequent rejection.