【発明の名称】管の圧延方法及びその実施に使用する装置

Japanese Patent JP3316979

B2

According to the rolling method and the apparatus to be used for its execution of the invention, by rolling a tube to be rolled by using four rolls possessing roll grooves for forming a caliber in a shape of having a relief portion, cold reducing or cold stretch reducing is done continuously without causing wall thickness deviation, and by sizing the rolled tube material by a die disposed at the exit side, the dimensional precision and yield of rolled tubes may be enhanced by a small number of stands.

JP3379499	INDUSTRIAL APPLICABILITY [Title of Invention] Method for constant diameter rolling of seamless metal pipe
JPS5916526	[Title of the Invention] An outside diameter correcting method and a device in a constant path machine for seamless-steel-tubes manufacture
JP5177261	Controlled rolling method for seamless steel pipes with excellent strength and low temperature toughness

Koichi Kuroda
Youichi Imamura
Kazuyuki Nakasuji
Chihiro Hayashi

JP27994493A

August 19, 2002

November 09, 1993

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SUMITOMO METAL INDUSTRIES,LTD.

B21B17/14; B21B27/02; B21B37/18; B21B37/78; B21B15/00; B21B39/00; (IPC1-7): B21B17/14; B21B27/02; B21B37/18; B21B37/78

JP6182404A
JP63278603A
JP44905A
JP5584235A
JP3198901A
JP6325201U

Norio Kawano

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