Load Distribution Method for Improving Rolling Stability of Hot Strip

Abstract

The invention provides a load distribution method improving rolling stability of a hot-rolled thin strip, relates to a control method suitable for rolling the hot-rolled thin strip and aims at providing the load distribution method improving the rolling stability of the hot-rolled thin strip. By means of the method, wide-range fluctuation of the load of a rolling mill caused by temperature fluctuation of a finish rolling inlet can be avoided, the rolling accidents are obviously reduced, and the rolling stability is greatly improved. The load distribution method improving the rolling stability of the hot-rolled thin strip includes the following steps that when the hot-rolled thin strip is rolled and a first piece of thin strip steel is rolled, distribution is performed according to a universal load distribution method; and when a second piece of strip steel and later same-steel-grade and same-specification strip steel are rolled, the downward-pressing rates of an F1 rolling mill, an F2 rolling mill and an F7 rolling mill are immobilized, the rolling force rates of rolling mills ranging from F3 to F6 are corrected, and the downward-pressing rates of the rolling mills ranging from F3 to F6 are made to be kept relatively stabilized.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a control method suitable for hot strip rolling. Background technique [0002] In the metallurgical industry, the hot-rolled sheet process generally includes a finishing mill, which is the most critical equipment and affects various control indicators of the finished product. The finishing mill generally includes work rolls, backup rolls, roll adjustment devices, guide devices, loopers, etc. [0003] The principle of distributing the reduction of each stand in the hot continuous rolling mill is: generally, it is to make full use of the favorable conditions of high temperature, and concentrate the reduction in the first few rolling mills as much as possible. For thin-gauge products, in order to ensure the plate shape, thickness accuracy and surface quality in the last few rolling mills, the reduction is gradually reduced. The specific distribution is as follows: [0004] (1) Consideri...

AI Technical Summary

Problems solved by technology

[0008] When rolling hot-rolled thin strips, due to fluctuations in the temperature at the entrance of the finish rolling, the load of the rolling mill fluctuates greatly, and steel stacking accidents and tailing accidents frequently occur during production, which greatly affects the stability of rolling and reduces production operations. rate and success rate, resulting in huge economic losses for the company