METHOD AND DEVICE FOR REMOVING WELDING SPATTER OF GALVANIZED STEEL SHEET

PURPOSE:To completely eliminate weld spatters without generating unequal removal by operating a heating means upon detection of the welding spatter part of a galvanized steel sheet which is continuously passed and melting the zinc of the spatter part by heating, then solidifying the molten zinc by c...

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Bibliographische Detailangaben
Hauptverfasser:	HIRAYAMA SHUNICHI, YAMASHINA SHUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To completely eliminate weld spatters without generating unequal removal by operating a heating means upon detection of the welding spatter part of a galvanized steel sheet which is continuously passed and melting the zinc of the spatter part by heating, then solidifying the molten zinc by cooling. CONSTITUTION:The galvanized steel sheet 11 which is un-coiled from an un- coiler 12 is continuously passed and the rear end of the preceding steel sheet and the front end of the succeeding steel sheet are welded and connected by a welding machine 13. The connected steel sheet is transported. The welding spatter part of the galvanized steel sheet formed by this welding is detected by a detecting sensor 14 disposed on the outlet side of the welding machine 13. A heating furnace 15 is operated by a control means 18 based on this detection signal to heat and melt the zinc in the welding spatter part. The in-furnace temp. is controlled to about 400 to 550 deg.C via a temp. detecting sensor 19 to sufficiently melt the zinc at this time and the alloying with the iron of the steel sheet is suppressed. A cooling means is thereafter operated to blow a cooling gas to the steel sheet, by which the molten zinc is cooled and solidified.