METAL PLATE FLATNESS CONTROLLING METHOD AND DEVICE

Title:

METAL PLATE FLATNESS CONTROLLING METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2001/036122

Kind Code:

A1

Abstract:

A method for improving the flatness of metal plates, and a device for embodying this method, by effectively preventing steel plate undulations which are produced in the widthwise edge of a metal plate when the latter reaches ordinary temperature after completion of hot rolling via a cooling process. The metal plate flatness controlling method comprises the steps of measuring the surface temperatures in the widthwise edge and central portion of the metal plate between finish rolling mills, which are tandem mills, or at the inlet and/or outlet of a finish rolling mill, which is a reversing mill, or after completion of hot rolling or after passage through a hot straightening machine, controlling the heating temperature for the widthwise edge and central portion of the metal plate on the basis of the measured surface temperatures, cooling the metal plate after finish rolling, whereby the distribution of surface temperatures becomes flat.

Inventors:

AKASHI TORU (JP)
KOREEDA GENICHI (JP)
ARIZUMI SEIJI (JP)
SERIZAWA YOSHIHIRO (JP)

Application Number:

PCT/JP2000/008093

Publication Date:

May 25, 2001

Filing Date:

November 16, 2000

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
NITTETSU PLANT DESIGNING CORP (JP)
AKASHI TORU (JP)
KOREEDA GENICHI (JP)
ARIZUMI SEIJI (JP)
SERIZAWA YOSHIHIRO (JP)

International Classes:

B21B37/44; B21B15/00; B21B37/74; B21B37/76; B21B39/00; B21B45/00; B21B45/02; (IPC1-7): B21D1/00; B21B37/00

Foreign References:

JPS5695404A	1981-08-01
JPS63126608A	1988-05-30
JPH06254616A	1994-09-13
JPH0871628A	1996-03-19
JPH07132307A	1995-05-23
JPS6293028A	1987-04-28
JPH03175001A	1991-07-30
JPH0466271A	1992-03-02
JPH11290946A	1999-10-26
JPH06269835A	1994-09-27
JPH105868A	1998-01-13
JPH05228525A	1993-09-07

Other References: