CN-119972793-B - Variable-specification rolling method and system of cold rolling tandem mill

CN119972793BCN 119972793 BCN119972793 BCN 119972793BCN-119972793-B

Abstract

The invention discloses a variable-specification rolling method and system of a cold rolling tandem mill, wherein the method comprises the steps of judging whether an i-th sequence steel coil which is currently rolled is subjected to variable-specification rolling or not in the rolling process, wherein the variable-specification rolling indicates that the i-th sequence steel coil which is currently rolled is different from a steel coil which is rolled last time, selecting rolling force self-learning coefficients of i-1 sequence steel coils of the same family in available sample libraries of two variable-specification sample libraries if the i-th sequence steel coil is subjected to variable-specification rolling, calculating set rolling force of the i-th sequence steel coil, wherein the two variable-specification sample libraries store the self-learning coefficients of the steel coils of the same family, the i-1 sequence steel coil and the i-th sequence steel coil belong to the same family steel coil and are rolled before the i-1 sequence steel coil is rolled, and rolling the i-th sequence by utilizing the set rolling force.

Inventors

LIU LI
LIU HAICHAO
ZHANG BAOLEI
HE XULING
WANG DIANLONG
MA JIAJI
LI SHUO
HU ZHIYUAN
ZHAO HAIRUI
CAO JING
LIU YUJIN
XIAO HUIMING

Assignees

首钢智新电磁材料(迁安)股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241128

Claims (5)

1. A gauge-changing rolling method of a cold rolling tandem mill, characterized by comprising: in the rolling process, judging the current rolling process Whether the sequential steel coil is rolled in a variable specification, wherein the variable specification rolling represents the current rolling of the first step The sequential steel coil and the last rolled steel coil are different in family; if the rolling is the variable-specification rolling, selecting the same family from the available sample libraries of the two variable-specification sample libraries -1 A rolling force self-learning coefficient of the sequence steel coil, calculating the first The two variable-specification sample libraries store self-learning coefficients of the same-family steel coils, the first one is a rolling force setting method -1 Sequence coil of steel and said first The sequence steel coil belongs to the same family steel coil and is the first -1 Rolling of the sequence steel coil before; the first rolling force is set to be equal to the second rolling force Rolling the sequential steel coil; Acquiring the first The rolling force deviation corresponding to the sequence steel coil specifically comprises the following steps of Calculating the actual parameters of the rolling of the sequence steel coil, calculating the rolling force value, and measuring the first The actual rolling force value of the sequential steel coil, obtaining the rolling force deviation according to the actual rolling force value and the calculated rolling force value, wherein the rolling force deviation is obtained according to a formula Processing the actual rolling force value and the calculated rolling force value to obtain the rolling force deviation, wherein, Representing the deviation of the rolling force in question, Representing the value of said actual rolling force, Representing the calculated rolling force value; Based on the rolling force deviation and the first -1 A rolling force self-learning coefficient of a sequence of coils, determining said first The rolling force self-learning coefficient of the sequence steel coil specifically comprises the following steps of according to the formula Processing the rolling force deviation and the first -1 The rolling force self-learning coefficient of the sequence steel coil to obtain the first The rolling force self-learning coefficient of the sequential steel coil, wherein, Represents the first The rolling force self-learning coefficient of the sequential steel coil, Representing the coefficient of smoothing and the coefficient of smoothing, Represents the first -1 The rolling force self-learning coefficient of the sequence steel coil; Judging whether the number of self-learning coefficients of the same-family steel coils stored in the available sample library reaches a set number; if not, the first step The rolling force self-learning coefficient of the sequence steel coil is stored in the available sample library; If yes, resetting the other sample library in the two variable-specification sample libraries, and resetting the first sample library The rolling force self-learning coefficient of the sequence steel coil is stored in the other sample library.
2. The method according to claim 1, wherein the determination of the current rolling After whether the sequential steel coil is rolled in a variable specification, the method further comprises the following steps: if the rolling is not the gauge change rolling, rolling is performed according to the set rolling force of the last rolling.
3. The method of claim 1, wherein the available sample library and the another sample library are alternately cleared.
4. The method of claim 1, wherein the two variable specification sample libraries have an initial value of 1 for the self-learning coefficients.
5. A gauge variable rolling system of a cold rolling mill, said system being applied to the method according to any one of claims 1 to 4, comprising: a judging module for judging the current rolling process Whether the sequential steel coil is rolled in a variable specification, wherein the variable specification rolling represents the current rolling of the first step The sequential steel coil and the last rolled steel coil are different in family; The calculation module is used for selecting the same family from the available sample libraries of the two variable-specification sample libraries if the variable-specification rolling is performed -1 A rolling force self-learning coefficient of the sequence steel coil, calculating the first The two variable-specification sample libraries store self-learning coefficients of the same-family steel coils, the first one is a rolling force setting method -1 Sequence coil of steel and said first The sequence steel coil belongs to the same family steel coil and is the first -1 Rolling of the sequence steel coil before; a rolling module for applying the set rolling force to the first section Rolling the sequential steel coil.

Description

Variable-specification rolling method and system of cold rolling tandem mill Technical Field The application relates to the technical field of steel coil cold rolling, in particular to a variable-specification rolling method and system of a cold rolling tandem mill. Background As is known, in the process of producing a cold-rolled steel strip, the specifications of the steel strip are different, the rolling force required in the cold-rolling production is different, and even the same kind of steel coil has a situation that the actual rolling force is greatly changed, so that a dynamic specification change (Flying Gauge Change, FGC) rolling technology is generally adopted to cope with the rolling requirement of the steel strip. This technique allows the conversion of the strip gauge, including the adjustment of the steel grade, thickness, width etc. parameters during the rolling process, i.e. without stopping the machine. In the dynamic gauge-changing rolling technology, the setting of the rolling force is of great importance, and due to a plurality of variable factors in the rolling process, such as the change of material properties, fluctuation of rolling process parameters, and even the rolling process change of steel coils, the setting precision of the rolling force can be reduced. Therefore, how to improve the accuracy of setting the rolling force of the steel coil during the rolling with variable specifications is a problem to be solved in the prior art. Disclosure of Invention In order to solve or partially solve the technical problem of lower rolling force setting precision of a dynamic variable-specification rolling technology, the invention provides a variable-specification rolling method and a variable-specification rolling system of a cold rolling tandem mill, when an ith sequence steel coil belongs to variable-specification rolling, the setting rolling force of the ith sequence steel coil is calculated by calling a rolling force self-learning coefficient of the ith-1 sequence steel coil of the same family, so that the rolling force setting value precision is improved. To solve the above technical problems, according to a first aspect of the present invention, a gauge-variable rolling method of a cold rolling tandem mill is disclosed, the method comprising: Judging whether the currently rolled ith sequence steel coil is subjected to variable-specification rolling or not in the rolling process, wherein the variable-specification rolling represents different families of the currently rolled ith sequence steel coil and the last rolled steel coil; If the rolling is the variable specification rolling, selecting the rolling force self-learning coefficient of the ith-1 sequence steel coil of the same family in available sample libraries of two variable specification sample libraries, and calculating the set rolling force of the ith sequence steel coil, wherein the two variable specification sample libraries store the self-learning coefficient of the same family steel coil, the ith-1 sequence steel coil and the ith sequence steel coil belong to the same family steel coil, and the rolling of the ith-1 sequence steel coil is before; And rolling the ith sequence steel coil by using the set rolling force. Optionally, after the step of judging whether the i-th sequence steel coil currently rolled is rolled in a variable specification, the method further includes: if the rolling is not the gauge change rolling, rolling is performed according to the set rolling force of the last rolling. Optionally, after the rolling the ith sequence steel coil with the set rolling force, the method further includes: acquiring rolling force deviation corresponding to the ith sequence steel coil; And determining the rolling force self-learning coefficient of the ith sequence steel coil based on the rolling force deviation and the rolling force self-learning coefficient of the ith sequence steel coil. Optionally, the obtaining the rolling force deviation corresponding to the ith sequence steel coil specifically includes: according to the actual parameters of the rolling of the ith sequence steel coil, calculating a calculated rolling force value; measuring the actual rolling force value of the ith sequence steel coil; And obtaining the rolling force deviation according to the actual rolling force value and the calculated rolling force value. Optionally, the obtaining the rolling force deviation according to the actual rolling force value and the calculated rolling force value specifically includes: According to the formula And processing the actual rolling force value and the calculated rolling force value to obtain the rolling force deviation, wherein ZP a represents the rolling force deviation, P a represents the actual rolling force value and P ca represents the calculated rolling force value. Optionally, the determining the self-learning coefficient of the rolling force of the i-th sequence steel coil based on the rolling for