FHM-based (fuzzy hyperbolic model-based) cold-rolling mill working roll emulsion sectional cooling control method

Abstract

The invention provides an FHM-based cold-rolling mill working roll emulsion sectional cooling control method. The method comprises determining the amount of nozzles covering strip steel and sequentially numbering the controllable nozzles; establishing fuzzy inference rules of an FHM-based cold-rolling mill working roll emulsion sectional cooling system; defining generalized input variables for the fuzzy inference rules and obtaining the fuzzy membership functions of fuzzy sets corresponding to the generalized input variables; by means of the obtained fuzzy inference rules, the obtained generalized input variables and the obtained fuzzy membership functions of the fuzzy sets, calculating out the spraying flow adjusting amount of an i-th nozzle at a current time to obtain an emulsion spraying flow adjusting amount calculation model of a controllable nozzle to achieve the flow control valve online control of the sectional cooling controllable nozzle. According to the FHM-based cold-rolling mill working roll emulsion sectional cooling control method, by establishing the physical relationship between plate shape deviation and the emulsion spraying flow adjusting amount of the controllable nozzle at the current time, the emulsion spraying flow adjusting amount calculation model of the controllable nozzle can be obtained and meanwhile the precise online control of cold-rolling mill working roll emulsion sectional cooling can be achieved.

Description

technical field [0001] The invention belongs to the field of cold-rolled steel strips, and in particular relates to a control method for segmental cooling of work roll emulsion of a cold-rolling mill based on a fuzzy hyperbolic model. Background technique [0002] A large amount of heat is generated during the rolling process of cold-rolled strip steel, which can cause uneven thermal expansion of the work rolls of the rolling mill, resulting in the thermal crown of the work roll body and changing the distribution of the roll gap, and finally makes the exit shape have an uneven distribution. High-order shape defects. Conventional shape control methods, such as roll tilting, work roll bending, intermediate roll shifting, etc., are often difficult to eliminate these irregular high-order shape defects. In the modern shape control system, the emulsion injection device is usually used to spray the emulsion to take away the heat generated during the rolling process, release the in...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a control method based on the fuzzy hyperbolic model of the cooling of the work roll emulsion in the cold rolling mill to solve the problem that the traditional technology cannot completely describe the physical mechanism of the rolling mill emulsion cooling. Technical issues for precise control

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