A control method for rough rolling buckle head of hot rolling tandem based on multiple heating furnaces

Abstract

The invention discloses a rough-rolling head warping and bending control method for a hot continuous rolling mill based on multiple heating furnaces, and relates to control equipment or method specially applicable to metal rolling mills or products machined by the metal rolling mills, in particular to a rough-rolling strip steel head warping and bending control method applicable to the hot continuous rolling mill equipped with the multiple heating furnaces. The method comprises steps as follows: determining rolling material hardness groups and heating furnace numbers; reading head warping and bending compensation values corresponding to the furnace numbers; determining the temperature difference of upper and lower surfaces of slabs of current rolling materials; reading head warping and bending temperature difference compensation values; setting the speed difference of upper and lower rollers of the rolling mill and compensating head warping and bending according to the head warping and bending temperature difference compensation values; inputting operation adjusting values to fine adjust head warping and bending; setting rough-rolling roller speeds, and adding head warping and bending operation adjusting values of rolling materials of all the heating furnaces to a head warping and bending compensation list of the multiple heating furnaces. According to the method, through learning and improvement on operational experience values, the operation interference is reduced, and rough-rolling head warping and bending can be correspondingly compensated and effectively controlled for different heating furnaces.

Description

technical field [0001] The invention relates to a control device or method specially suitable for a metal rolling mill or its processed products, in particular to a control method for rough-rolled strip buckle head of a hot continuous rolling mill equipped with multiple heating furnaces. Background technique [0002] The process flow of the existing hot rolling production line is as follows: figure 1 As shown, usually through the heating furnace 10, rough rolling 20, finish rolling 30, layer cooling 40 and coiling 50 processes. During the rough rolling process, due to the uneven temperature distribution and uneven deformation in the thickness direction of the slab, and the front end of the rolled piece is not hindered by the uneven deformation when it bites in, the head of the rolled piece will appear up and down. The phenomenon of warping or bending down, forming a warped head or a buckled head, respectively as figure 2 with image 3 shown. Warping and buckling are col...

AI Technical Summary

Problems solved by technology

However, in the actual rolling site, the "previous rolling material" and the "subsequent rolling material" usually do not come from the same heating furnace, because the rolling ends of each heating furnace are inconsistent, sometimes even opposite, the above-mentioned prior art The control effect of the warping head of the scheme is often not ideal. During the rough rolling operation, it is often necessary to frequently adjust the speed difference between the upper and lower rolls. Differences can sometimes even cause misuse

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