Title:
METHOD OF CONTROLLING MEANDERING OF MATERIAL-TO-BE-ROLLED
Document Type and Number:
WIPO Patent Application WO/2020/213542
Kind Code:
A1
Abstract:
In this method of controlling meandering of a material-to-be-rolled, a rolling machine has a plurality of rolls including at least a pair of work rolls and a pair of reinforcement rolls. The method comprises: an estimation step for acquiring, before a tail end portion of the material-to-be-rolled is rolled, at least one among a thrust force between rolls that is estimated on the basis of a cross angle between the rolls that is obtained by measurement or estimation, and a thrust force between a material and a roll that is estimated on the basis of a cross angle between the material and the roll that is obtained by measurement or estimation and a friction coefficient between the material and the roll; and a tail end control step which is executed when the tail end portion of the material-to-be-rolled is rolled, and in which rolling loads on a working side and a driving side are measured, a rolling load difference or a rolling load difference rate is corrected on the basis of two acquired parameters of a thrust reaction force in a roll axis direction, a thrust force between rolls, and a thrust force between a material and a roll when the rolling load is measured, and rolling leveling of the rolling machine is controlled on the basis of the corrected rolling load difference or the corrected rolling load difference rate.
Inventors:
YAMAGUCHI KAZUMA (JP)
ISHII ATSUSHI (JP)
NIKKUNI DAISUKE (JP)
ISHII ATSUSHI (JP)
NIKKUNI DAISUKE (JP)
Application Number:
PCT/JP2020/016194
Publication Date:
October 22, 2020
Filing Date:
April 10, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21B37/72; B21B37/68
Domestic Patent References:
| WO2018163930A1 | 2018-09-13 |
Foreign References:
| JP2005000976A | 2005-01-06 | |||
| JPH1147814A | 1999-02-23 | |||
| JP2000003129A | 2000-01-07 | |||
| JP2005000976A | 2005-01-06 | |||
| JP2014004599A | 2014-01-16 | |||
| JP2009178754A | 2009-08-13 | |||
| JPH04284909A | 1992-10-09 |
Other References:
Y. LIU ET AL.: "Investigation of Hot Strip Mill 4 Hi Reversing Roughing Mill Main Drive Motor Thrust Bearing Damage", AISTECH 2009 PROCEEDINGS, vol. II, 2009, pages 1091 - 1101
See also references of EP 3957410A4
See also references of EP 3957410A4
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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