Abnormal shape forecasting method suitable for four-high rolling mill

Abstract

The invention relates to an abnormal shape forecasting method suitable for a four-high rolling mill. The abnormal shape forecasting method is characterized by comprising the following computer-executed steps of: (1) collecting main equipment parameters of the four-high rolling mill having abnormal rolling to be forecasted; (2) collecting characteristic parameters of a strip to be rolled; (3) collecting normal rolling process parameters; (4) giving abnormal rolling process parameters; (5) carrying out unit division and figuring out influence coefficients; (6) forecasting front tension transverse distribution value of the strip during the abnormal rolling; and (7) forecasting outlet shape distribution of the strip during the abnormal rolling. The abnormal shape forecasting method suitable for the four-high rolling mill, provided by the invention, has the following advantages that: influences of single or comprehensive effect of abnormal factors, such as strip runoff, asymmetric roll shape, misalignment between a rolling central line and a roll central line, asymmetric roll bending, asymmetric roll shifting and the like, on the rolling mill finished product shape are quantitatively forecasted, and the influences of symmetric roll bending, symmetric roll shifting, roll tilting and other normal factors on the finished product shape are quantitatively forecasted so as to provide basis for the shape control under the abnormal rolling condition.

Description

technical field [0001] The invention relates to the technical field of computer control of a four-high rolling mill in metallurgy, in particular to an abnormal shape prediction method suitable for a four-high rolling mill. Background technique [0002] In recent years, with the rapid development of the strip industry, the user's requirements for the strip shape quality are also increasing. Correspondingly, in order to better control the shape of the shape, people have put forward higher and higher requirements for the prediction accuracy and adaptability of the shape calculation model. Four-high rolling mill is the most conventional and widely used model. Since the 1960s, scholars at home and abroad have conducted research on its flatness calculation model and achieved a large number of research results. [1-5] . However, looking at the relevant literature at home and abroad, it can be found that the previous research on the shape model of the four-high rolling mill is base...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for forecasting the abnormal shape of a four-roll mill, which is suitable for the abnormal shape prediction method of a four-high rolling mill, by which the following can be achieved Three functions: (1) Quantitatively predict the rolling mill’s exit plate when there are abnormal factors such as strip deviation, asymmetric roll shape, misalignment of rolling center line and roll center line, asymmetric roll bending, and asymmetric roll shifting. (2) Quantitatively predict the exit flatness value of the rolling mill under the action of normal factors such as symmetrical roll bending, symmetrical roll shifting, and tilting roll; (3) Quantitatively predict the exit flatness value of the rolling mill under the combined action of normal and abnormal factors shape value

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