Title:
STRIP ROLLING MILL AND ITS CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2009/057820
Kind Code:
A1
Abstract:
A strip rolling mill and a method for controlling a strip rolling mill are provided
which solve the wavy flatness defects extending over the width such as a strip
running failure due to warp of the strip to be rolled, an undulation, a full wave,
or a small wave. A strip rolling mill is characterized by comprising a pair of
upper and lower work rolls, a pair of motors for independently driving the respective
paired rolls, and control means for controlling one of the motors by using the
roll rotational speed as a control target value and controlling the other by using
the drive torque as a controlled variable while aiming at control such that the
rolling torque applied to the strip to be rolled by the work roll driven by the other
motor is approximately constant.
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Inventors:
OGAWA SHIGERU (JP)
ISHII ATSUSHI (JP)
NAKAMURA YOJI (JP)
HIGASHIDA YASUHIRO (JP)
ISHII ATSUSHI (JP)
NAKAMURA YOJI (JP)
HIGASHIDA YASUHIRO (JP)
Application Number:
PCT/JP2008/070251
Publication Date:
May 07, 2009
Filing Date:
October 30, 2008
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
OGAWA SHIGERU (JP)
ISHII ATSUSHI (JP)
NAKAMURA YOJI (JP)
HIGASHIDA YASUHIRO (JP)
OGAWA SHIGERU (JP)
ISHII ATSUSHI (JP)
NAKAMURA YOJI (JP)
HIGASHIDA YASUHIRO (JP)
International Classes:
B21B35/00; B21B37/00; B21B37/46
Foreign References:
| JPS609509A | 1985-01-18 | |||
| JPS5471064A | 1979-06-07 | |||
| JPS6199511A | 1986-05-17 | |||
| JPS5573404A | 1980-06-03 | |||
| JPH07164031A | 1995-06-27 | |||
| JP2002346617A | 2002-12-03 | |||
| JPS5471064A | 1979-06-07 | |||
| JPS609509A | 1985-01-18 |
Other References:
FUJI ELECTRIC JOURNAL, vol. 73, no. 11, 2000, pages 614 - 618
See also references of EP 2221121A4
See also references of EP 2221121A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg.5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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