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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 (6-3 Otemachi 2-chome, Chiyoda-k, Tokyo 71, 1008071, JP)
小川茂 (〒71 東京都千代田区大手町二丁目６番３号新日本製鐵株式会社内 Tokyo, 1008071, JP)
ISHII, Atsushi (6-3 Otemachi 2-chome, Chiyoda-k, Tokyo 71, 1008071, JP)
石井篤 (〒71 東京都千代田区大手町二丁目６番３号新日本製鐵株式会社内 Tokyo, 1008071, JP)
Application Number:
JP2008/070251
Publication Date:
May 07, 2009
Filing Date:
October 30, 2008
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-3 Otemachi 2-chome, Chiyoda-ku Tokyo, 71, 1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区大手町二丁目６番３号 Tokyo, 1008071, JP)
OGAWA, Shigeru (6-3 Otemachi 2-chome, Chiyoda-k, Tokyo 71, 1008071, JP)
小川茂 (〒71 東京都千代田区大手町二丁目６番３号新日本製鐵株式会社内 Tokyo, 1008071, JP)
ISHII, Atsushi (6-3 Otemachi 2-chome, Chiyoda-k, Tokyo 71, 1008071, JP)
International Classes:
B21B35/00; B21B37/00; B21B37/46
Attorney, Agent or Firm:
AOKI, Atsushi et al. (SEIWA PATENT & LAW, Toranomon 37 Mori Bldg.5-1, Toranomon 3-chom, Minato-ku Tokyo 23, 1058423, JP)
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