Normal four-roller hot strip steel continuous rolling mill strip steel edge thickening integrated controlling method

Abstract

The invention relates to the technical field of strip shape control in continuous rolling mills, and discloses a strip edge control method for ordinary four-high hot strip continuous rolling mills that does not have equipment means such as roll traverse, online grinding rolls, and strip edge lubrication. The comprehensive control method of thickening at the end, by optimizing the original roll shape curve of the work roll of the finishing mill, optimizing the lateral distribution of the cooling water of the work roll and reasonably controlling the rolling rhythm, the local thickening of the edge of the hot-rolled strip at about 40-60mm is realized. Thick controls. The invention solves the problem that the existing common four-high hot strip continuous rolling mill lacks effective control means for the thickening phenomenon of the opposite side except adding special equipment, and has no auxiliary equipment such as roll lateral movement, online grinding roll, strip edge lubrication, etc. The ordinary four-high rolling mill and PC rolling mill provided a comprehensive control method for strip edge thickening without additional equipment.

Description

technical field [0001] The invention relates to a continuous rolling mill, in particular to the shape control of a common four-high hot strip continuous rolling mill. Background technique [0002] Continuous rolling mills are widely used in the metallurgical industry. [0003] In the strip shape control technology in hot strip production, the strip shape includes two concepts of flatness and section shape. Flatness refers to the macro wave shape of the strip, such as middle wave, edge wave, rib wave, etc.; cross-sectional shape refers to the thickness distribution of the strip width direction, including plate convexity, wedge shape, edge thinning and local high points, etc. . The shape control of hot-rolled strip steel, such as strip flatness and plate crown, plays an important role in the quality of hot-rolled strip steel. At present, many hot-rolled strip shape control technologies have been successfully developed. There are mainly the following methods: The first is th...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the lack of effective control means for the thickening of the edge of the existing common four-high hot-strip continuous rolling mill except for the addition of special equipment, the technical problem to be solved by the present invention is to provide a method that does not increase equipment. A comprehensive control method that can effectively control the thickening phenomenon at the edge of the hot-rolled strip at about 40-60 mm

Images