Sectional cooling control method for emulsion of working roller of single-frame rolling mill

A technology of segmented cooling and control method, applied in the direction of roll, metal rolling, profile control, etc., can solve the problems of lag in the mechanism of emulsion spray cooling and inability to accurately control, meet real-time requirements, and improve shape quality. , The effect of eliminating high-order shape deviation

CN102389902BInactive Publication Date: 2013-09-18WISDRI ENG & RES INC LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-09-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a sectional cooling control method for an emulsion of a working roller of a single-frame rolling mill. Particularly, a fuzzy modeling method is used for establishing a quantitative relation among a plate-shape deviation, a previous regulating quantity of injected flow of the emulsion and a present regulating quantity of the injected flow of the emulsion, thereby realizing high-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill. The method provided by the invention overcomes the technical problem that precise control cannot be realized because a long-time hysteresis phenomenon exists in an emulsion injecting cooling action mechanism; high-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill is realized, thereby efficiently eliminating high plate-shape deviation of cold-rolling strip steel and promoting the quality of the plate shape of a cold-rolling strip steel product; the method is simple and practicable, fully meets a real-time demand of a sectional cooling control system and is characterized by effectiveness and practicability; and a firm foundation is established for high-precision plate-shape control of the cold-rolling strip steel.
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Description

technical field

[0001] The invention relates to the field of cold-rolled steel strips, in particular to an emulsion cooling control method for work rolls of a single-stand rolling mill. Background technique

[0002] A large amount of heat will be generated in the production process of cold-rolled strip steel, which will cause uneven thermal expansion of the work rolls of the rolling mill, form the thermal crown of the work rolls and change the distribution of the roll gap, and finally make the exit shape have a high-order shape with uneven distribution defect. 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 internal stress of the work rolls, improve the service life...

Examples

Embodiment Construction

[0055] The emulsion cooling control method for the work roll of a single-stand rolling mill provided by the present invention is characterized in that the relationship between the plate shape deviation, the past emulsion injection flow adjustment amount and the current emulsion injection flow adjustment amount is established by the fuzzy modeling method. Quantitative relationship, the calculation model of nozzle emulsion flow adjustment based on fuzzy model is designed, and the flow control valve of segmental cooling nozzle is adjusted online, so as to realize the high-precision emulsion cooling control of single-stand rolling mill work rolls.

[0056] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited.

[0057] Strip steel production for a single-stand reversing cold rolling mill based on the invention. The invention has been successfully applied on a single stand six-hi...