Hot rolling flat roller play control method

Abstract

The invention discloses a hot rolling flat roller play control method which provides more specific roller play strategies for different tandem rolling plans. The play control method includes the steps of classifying all strip steels of a rolling plan into two categories, a wide plate and a narrow plate, based on a critical width; as to the narrow plate, calculating the roller play positions of all the strip steels in a recursion mode, and then extracting the roller play position of the narrow plate; as to the wide plate, determining a permitted variation range of each roller play position, building an objective function for evaluating the sectional shape of the strip steel based on the rolling plan, and then optimally calculating the roller play position of the wide plate by employing the genetic algorithm. The hot rolling flat roller play control method breaks through the conventional roller play mode by providing more specific roller play strategies for different tandem rolling plans. The strip steels are classified into the wide plate and the narrow plate, and the narrow plate is calculated in a recursion mode, while the wide plate is optimally calculated by the genetic algorithm. Thus, the hot rolling flat roller play control method plays an active role in improving the quality of the strip shape of the tandem rolling strip steel.

Description

technical field [0001] The invention relates to the technical field of hot-rolled strip forming processing, in particular to a roll movement control method for cross-rolling. Background technique [0002] As users have higher and higher requirements for the accuracy of geometric dimensions of hot-rolled strip steel, the requirements for the accuracy of geometric dimensions of strip steel are not only thickness, width, flatness and convexity, but more attention is paid to the cross-sectional shape of strip steel. [0003] However, in the finishing rolling process of hot-rolled strip steel, due to the relatively low temperature at the edge of the strip, as well as the influence of factors such as the lateral flow of the strip and the shape of the edge of the strip, the wear of the roll on the edge of the strip is greater than that at the middle. So-called edge local wear is formed. Especially in the cross-rolling of silicon steel and tinplate, with the extension of the rollin...

AI Technical Summary

Problems solved by technology

[0005] The most important thing in the use of the roll shifting system is the determination of the roll shifting strategy. The current roll shifting strategies in the prior art are as follows: figure 1 As shown, it is periodic roll shifting with fixed step length and constant range. This roll shifting mode is easy to control and can solve the problem of uneven wear of rolls to a certain extent. However, it is found in actual production that as the number of rolled coils increases, The central area of ​​the work rolls is more and more worn, which is prone to defects such as crushing and periodic large edge waves, which has a great impact on the normal production of the hot rolling production line

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