Method of and apparatus for producing steel pipes

A method of producing steel pipes (43) is provided which comprises the steps of providing a steel strip (1), processing the steel strip (1) into a preheated open pipe (10), preheating the open pipe (10) at its two opposite longitudinal edges at a temperature higher than about the Curie point, heatin...

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Bibliographische Detailangaben
Hauptverfasser:	SUGANO, KOJI, SUGIE, YOSHINORI, ITADANI, MOTOAKI, AMAGASA, TOSHIAKI, HASHIMOTO, YUJI, TOYOOKA, TAKAAKI, TANAKA, NOBUKI, YORIFUJI, AKIRA, OHNISHI, TOSHIO
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 ROLLING OF METAL SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A method of producing steel pipes (43) is provided which comprises the steps of providing a steel strip (1), processing the steel strip (1) into a preheated open pipe (10), preheating the open pipe (10) at its two opposite longitudinal edges at a temperature higher than about the Curie point, heating the open pipe (10) at the two opposite edges at a temperature higher than about 1,300 DEG C but lower than the melting point of the steel strip (1), pressure welding the resultant open pipe (10) with a squeeze roll (8) to thereby form a steel pipe (11), smoothing the steel pipe (11) at its thick-walled portion formed on an outer surface of the welded seam, and subsequently cutting or winding the resulting steel pipe (43). An apparatus adapted to form the steel pipes is also provided.