Method for improving online roll grinding rate of finishing mill

Abstract

The invention relates to a method for improving the roll grinding rate of a finishing mill. In the method, after a program controlled computer computes the data acquired by an executing computer on the grinding at the last roll grinding rhythm, a grinding time is set to control the executing computer to perform grinding alone in an IN BAR or BAR To BAR manner or in In BAR and BAR TO BAR manners, which can be switched automatically, in a preset mode. The method has the advantages that: the grinding rate of the working roll of the finishing mill is doubled, the surface roughness of the working roll is kept between 1.0 and 1.5 micrometers constantly; the residual abrasion loss of the working roll is reduced; the roll surface transition is smooth and the rebound width of 250 millimeters is realized; annular grooves are not formed on the surface of the roll, local high points on the cross sections of steel strips are eliminated, and the fixed-width rolling amount is up to over 70 kilometers; and meanwhile, the service life of the roll is prolonged, the roll replacement times are reduced, the working efficiency of the finishing mill is improved and the surface quality of the steel strips are improved.

Description

technical field [0001] The invention belongs to the field of automatic control of steel rolling, and in particular relates to a control method for increasing the online roll grinding rate of work rolls in a finishing mill for hot-rolled strip steel. Background technique [0002] On-line roll grinding (ORG for short) is a new technology developed in recent years. The active online roll grinding device with two grinding heads, or ORG device, is a new equipment developed by Mitsubishi Heavy Industries, Japan, to improve the quality of the work roll surface and control the roll shape. It can not only improve the uneven wear of the roll, but also greatly improve the The rolling capacity of the same width of the strip can be reduced, and the steps on the surface of the work roll can be eliminated or reduced to realize the reverse jump of the width during the rolling process. Therefore, the use of ORG plays an important role in free program rolling. As a new technology, the activ...

AI Technical Summary

Problems solved by technology

Due to the rough surface of the work roll, it not only affects the surface quality of the hot-rolled plate, but also greatly reduces the same-width rolling capacity of the strip

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