Title:
ROLLING METHOD BY INCLINED ROLLING MILL
Document Type and Number:
Japanese Patent JP2605541
Kind Code:
B2
Abstract:
PURPOSE: To prevent indents in the shape of an inside pit given by pressing in inside scales of a hollow tube stock.
CONSTITUTION: A draw starting position of the hollow tube stock 3 by rolling rolls 1 and a plug 2 is set on the outlet side of gouges G of the rolling rolls 1 and a distance A between the gouge G and the draw starting position P is set to 0≤A≤[πD(sinθ)η]/ε (D: outer diameter of tube after it is rolled, θ: inclined angle of roll, η: forward efficiency, ε: draw ratio) and rolled. In this way, when the set up for the rolling is changed, indents of inside scales can be prevented from being generated in drawing.
Inventors:
Kimura Shigeru
Application Number:
JP2182192A
Publication Date:
April 30, 1997
Filing Date:
January 10, 1992
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B19/04; B21B19/08; (IPC1-7): B21B19/08
Domestic Patent References:
| JP63220908A |
Attorney, Agent or Firm:
Yoshihisa Oshida