Automatic control method of width of hot continuous rolling and finish rolling strip steel

A hot continuous rolling and strip steel technology, which is applied in the direction of metal rolling stand, metal rolling mill stand, etc., can solve the problems that affect the stability of the finishing rolling system, it is difficult to maintain the consistency of the strip width, and it cannot be taken into account.
CN103286141AActive Publication Date: 2013-09-11BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2013-09-11

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Abstract

The invention relates to the field of strip steel hot rolling, in particular to a control method of the width of hot rolling strip steel. An automatic control method of the width of hot continuous rolling and finish rolling strip steel comprises the steps as follows: a temperature change model of the strip steel in a finish rolling process is built, sensitivity coefficients are calculated, and temperature reference values of the strip steel at rack outlets are calculated; temperature modification values of the strip steel at the rack outlets are calculated, and temperature prediction values are obtained in combination of the temperature reference values and the temperature modification values; real-time change values of the width of the strip steel are calculated; feedback deviation values of the width of the strip steel are obtained through comparison, and the feedback deviation values are distributed to racks, so that feedback deviation values of the width of the strip steel, which are required to be adjusted by the racks, are obtained; and tension of loops among the racks are adjusted in combination of the real-time change values of the width of the strip steel and the feedback deviation values of the width of the strip steel, so that the width of the steel strip is controlled. The method can well guarantee that the width of the strip steel after finish rolling can fluctuate nearby set values, the width accuracy of a strip product is finally improved, and accordingly, the utilization rate of a material by a downstream user is remarkably increased.
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Description

technical field

[0001] The invention relates to the field of strip hot rolling, in particular to a method for controlling the width of a hot strip. Background technique

[0002] The finished width accuracy of hot-rolled strip steel is a very important technical index. For hot-rolled production, the quality of width accuracy directly affects the success rate of strip steel; for downstream users, it directly affects the raw material quality. utilization rate. Every time the width deviation is reduced by 1 mm, the yield can be increased by about 0.1% based on the actual finished strip width. Therefore, high-precision width control technology can significantly improve economic benefits.

[0003] In the traditional sense, the equipment and technology of strip width control are mainly concentrated in the roughing mill. The width control equipment in the rough rolling area is mainly a powerful large vertical roll mill. The control method mainly includes (1) automatic control of t...

Claims

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