Feed-forward control method for thickness expansion of tandem cold rolling mill

Abstract

The invention discloses a cold continuous mill thickness extension feed-forward control method. The cold continuous mill thickness extension feed-forward control method comprises the steps that a first thickness gauge, a second thickness gauge and a fifth thickness gauge are installed in front of an inlet of a first rack, an inlet of a second rack and an inlet of a fifth rack correspondingly, the first thickness gauge, the second thickness gauge and the fifth thickness gauge are used for measuring the thickness deviations of incoming materials at the inlet of the first rack, the inlet of the second rack and the inlet of the fifth rack correspondingly, and the thickness deviations are used for feed-forward control of the first rack, the second rack and the fifth rack correspondingly; the thickness deviation of an inlet of a third rack is estimated according to the thickness deviation actually measured by the second thickness gauge, and the estimated thickness deviation of the inlet of the third rack is transmitted to the third rack so that thickness feed-forward control can be conducted; and the thickness deviation of an inlet of a fourth rack is estimated according to the estimated thickness deviation of the inlet of the third rack, and the estimated thickness deviation of the inlet of the fourth rack is transmitted to the fourth rack so that thickness feed-forward control can be conducted. By means of the cold continuous mill thickness extension feed-forward control method, the strip steel thickness control precision is improved.

Description

technical field [0001] The invention relates to a five-stand cold tandem rolling mill system, in particular to a thickness expansion feedforward control method of a cold tandem rolling mill. Background technique [0002] Thickness accuracy is one of the most important quality indicators for cold-rolled strip steel. With the rise and development of industries such as automobiles, aviation, home appliances, precision instruments, civil construction, and food cans, there are strict requirements for the thickness accuracy of cold-rolled strip steel. [0003] The tandem cold rolling mill is one of the most complex, highly automated, and precision-required equipment in the metallurgical industry. It represents the technological development level of the iron and steel industry to a certain extent. Thickness feed-forward control of tandem cold rolling mill is an important means to ensure the thickness precision of finished cold rolled strip. The thickness difference of the incomin...

AI Technical Summary

Problems solved by technology

The reason why the third rack S3 and the fourth rack S4 did not participate in the thickness control is mainly because there is no thickness gauge installed at the entrance of the rack

Adding a thickness gauge in front of the third rack S3 and the fourth rack S4 respectively, the investment cost of the equipment is huge, and the burden of equipment maintenance is increased at the same time

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