Title:
【発明の名称】管の傾斜ロ-ル圧延機および圧延方法
Document Type and Number:
Japanese Patent JPS5947605
Kind Code:
B2
Abstract:
The present invention is an improvement of such methods as the Stiefel-Mannesman piercing, and the Mannesmann piercing methods with a pair of driven rolls which impart a screw movement to the work piece, and has the roll axis inclined to the centerline of mill. Instead of a conventional pair of driven disc rolls or shoes, one driven disc roll and one shoe or one guide roll are used in the invention to form the rolling pass together with the driven rolls, and the centerline of pass is greatly off set from the centerline of mill toward the one shoe or guide roll. The operating efficiency and quality of tubular products are simultaneously enhanced.
Inventors:
YOSHIHARA SEISHIRO
KANDA MITSUO
KANDA MITSUO
Application Number:
JP5358180A
Publication Date:
November 20, 1984
Filing Date:
April 24, 1980
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
B21B19/02; B21B19/06; (IPC1-7): B21B19/06
Attorney, Agent or Firm:
Tomoyuki Yathata
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