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

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 realizinghigh-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.

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...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for controlling the emulsion cooling of the work rolls of a single-stand rolling mill in stages, so as to solve the technical problem that the mechanism of emulsion jet cooling has a long time lag and cannot be accurately controlled.

Images