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专利名称：METHOD OF MANUFACTURING SEAMLESS
STEEL PIPE
发明人：Sasaki, Kenichi,Yamane, Akihito申请号：EP03734615.2申请日：20030127公开号：EP1479457A1公开日：20041124
专利附图：
摘要：A method of producing a seamless steel tube to enable it to suppress not onlythe deviations in wall thickness occurring in the direction of reduction in a mandrel millbut also the derivations in thickness occurring at places deviating from the direction of
reduction: measuring the wall thicknesses within the circumferential directions of aseamless steel tube 14 rolled in a production line comprising a mandrel mill 11 consistingof a plurality of reduction stands 111 to 115 having reduction rolls disposed in successionwith the directions of reduction varied each other, and controlling, separately andindividually based on the results of the measurement, the positions of both ends of eachaxis of the reduction rolls 114 , 115 in the final reduction stands of the mandrel mill 11 sothat the deviations in wall thickness can be minimized.
申请人：SUMITOMO METAL INDUSTRIES, LTD.
地址：5-33, Kitahama 4-chome, Chuo-ku Osaka-shi, Osaka 541-0041 JP
国籍：JP
代理机构：Simons, Amanda Louise
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