Title:
METHOD FOR CONTROLLING METAL ROLLING IN SEAMLESS STEEL PIPE MANUFACTURING LINE
Document Type and Number:
Japanese Patent JP3494131
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently manufacture a seamless steel pipe whose finishing dimension is secured thanks to the continuously manufacturing line since deflected wall thickness in the circumferential direction is less and the thickness in the end of the pipe is inhibited.
SOLUTION: (1) A method for controlling the metal rolling used in the seamless steel pipe manufacturing line connected in series by a boring machine, a drawing roll mill and an outside dia. forming mill and a hot thickness gage to measure a wall thickness dimension after the rolling in the outlet side of the drawing roll mill, and a hot thickness gage to measure a wall thickness dimension after the finishing in the outlet side of the outside dia. forming mill are provided and the method for controlling the metal rolling characterized by the feature that the finishing dimension after the outside forming mill is adjusted to meet the targeted dimension. (2) In the method for controlling the metal rolling described in (1), a hot thickness gage to measure wall thickness dimensions after boring in the outlet side of the boring machine is preferably provided.
Inventors:
Kenichi Shinoki
Application Number:
JP2000226386A
Publication Date:
February 03, 2004
Filing Date:
July 27, 2000
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B17/04; B21B19/04; B21B37/18; B21B37/78; B21C51/00; (IPC1-7): B21B37/78; B21B17/04; B21B19/04; B21B37/18; B21C51/00
Domestic Patent References:
| JP7246415A | ||||
| JP617010A | ||||
| JP5143825B1 |
Attorney, Agent or Firm:
Mikiji Sugioka (2 outside)
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