Optimized control method of roll technological parameter for cold band-steel continuous rolling mill

Abstract

The present invention provides an optimizing control method of technical parameter of roll of cold strip steel continuous rolling mill. It utilizes the comprehensive consideration of slippage and hot scuff mark prevention and influence of other factors on parameter to set reasonable initial roughness of roll changing period so as to optimize control process of rolling process. On the computer system it includes the following steps: (1) setting objective friction coefficient of every stand; (2) making optimum computation of initial roughness of working roll of every stand and roll changing period; and (3). using the above-mentioned optimum compulative result as correspondent set value.

Description

technical field [0001] The invention relates to the field of production and control of metallurgical processes, in particular to an optimization control method for roll process parameters of a cold-strip continuous rolling mill. Background technique [0002] figure 1 It is a schematic diagram of the cold strip continuous rolling process. Such as figure 1 As shown, the strip 1 is uncoiled from the uncoiler 2 and sent to racks 1#~i#. After being rolled by multiple racks, the strip reaches a specified thickness and is sent to the coiler 3 for rewinding. The rolls of each stand include backup rolls 4 and work rolls 5, wherein the work rolls are in direct contact with the strip surface. [0003] The technical parameters of the rolling process generally include parameters such as rolling speed, front and rear tension, reduction, initial roughness of the roll (that is, the roughness of the roll just after replacement) and roll replacement cycle (hereinafter referred to as the ro...

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Problems solved by technology

[0004] However, when using the existing methods to set parameters such as the initial roughness of the roll and the roll change cycle, generally only their influence on the wear and tear of the roll and the surface quality and roughness of the strip are considered, and they have never been connected with the cold. The slipping in the rolling process is connected with the probability of thermal slipping, so the original roughness of the roll and the roll changing period cannot be set reasonably in the production process. Slipping and thermal slipping, which limit the improvement of rolling speed, seriously affect the productivity of the rolling mill and the surface quality of the strip, or overcorrect, resulting in frequent replacement of rolls, increasing production costs and reducing the production efficiency of the rolling mill

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