JP2001137918A - Setup method of hot-rolling mill - Google Patents
Setup method of hot-rolling millInfo
- Publication number
- JP2001137918A JP2001137918A JP32484299A JP32484299A JP2001137918A JP 2001137918 A JP2001137918 A JP 2001137918A JP 32484299 A JP32484299 A JP 32484299A JP 32484299 A JP32484299 A JP 32484299A JP 2001137918 A JP2001137918 A JP 2001137918A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- temperature
- rolling mill
- rolled
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は，熱間圧延機のセッ
トアップ方法に係り，詳しくは，予め採取された被圧延
材の長手方向の平均温度に基づいて，被圧延材を通過さ
せる前に熱間圧延機のロールギャップ又はこれに対応し
た値を含む平均セットアップ値を求め，該平均セットア
ップ値を用いて上記熱間圧延機の設定を行う熱間圧延機
のセットアップ方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting up a hot rolling mill, and more particularly to a method for setting a hot rolling mill before passing a rolling material based on an average temperature in a longitudinal direction of the material to be rolled. The present invention relates to a hot rolling mill set-up method in which an average setup value including a roll gap of a hot rolling mill or a value corresponding thereto is determined, and the hot rolling mill is set using the average setup value.
【０００２】[0002]
【従来の技術】熱間圧延機の板厚制御では，一般に通板
前にロール速度と圧下位置を設定するセットアップ制御
と通板後に採取されたデータに基づいて圧下位置を調整
するフィードバック制御（ＡＧＣ）とが行われる。しか
しながら，通板直後の板厚は，フィードバック制御では
間に合わない。そのため先端部の板厚精度を向上させる
にはセットアップ制御を高精度に実施する必要がある。
セットアップの方法には，大きく分けて２つの方法があ
る。一つは，長手方向の一点の板温度をもとに計算する
方法（瞬時値セッティング）であり，他の一つは，長手
方向（あるいは定常部長手方向）の平均温度をもとに計
算する（平均値セッティング）である。しかし，加熱炉
の燃料コスト削減のために在炉時間を短縮したり加熱炉
の制約等により十分に加熱できない場合，長手方向に温
度勾配が生じる（特に先端部では勾配が大きくなる）。
この場合，瞬時値セッティングでは，板厚を大きく劣化
させる可能性があり，高応答のＡＧＣやミル直近の板厚
計が必要となる。平均値セッティングでは，高い板厚精
度は補償できないものの，このように先端部に温度勾配
がある場合にも板厚を大きく劣化させることはない。平
均値セッティングにおける，温度勾配の対応方法として
は，例えば特開平６−１４２７４１号公報（以下，参照
公報１という）に記載された熱間圧延装置の板厚制御方
法，特開平８−１５５５２４号公報（以下，参照公報２
という）に記載された熱間圧延における鋼板先端部の温
度予測方法などがある。上記参照公報１に記載の熱間圧
延装置の板厚制御方法では，圧延機入側に設置された温
度計により採取された先端部温度と定常部温度との差か
ら圧下位置が修正される。また，上記参照公報２に記載
の熱間圧延における鋼板先端部の温度予測方法では，鋼
板の厚さ方向の位置と長手方向の位置とを独立変数とす
る熱伝導方程式と境界条件，初期条件に基づいて，先端
部の温度が計算される。2. Description of the Related Art In thickness control of a hot rolling mill, generally, setup control for setting a roll speed and a rolling position before threading and feedback control (AGC) for adjusting a rolling position based on data collected after threading. Is performed. However, the sheet thickness immediately after threading cannot be reached by feedback control. Therefore, it is necessary to perform the setup control with high accuracy in order to improve the thickness accuracy of the tip portion.
There are roughly two setup methods. One is a method of calculating based on the plate temperature at one point in the longitudinal direction (instantaneous value setting), and the other is a method of calculating based on the average temperature in the longitudinal direction (or the longitudinal direction of the steady part). (Average value setting). However, when the heating time cannot be sufficiently reduced due to the shortening of the furnace time in order to reduce the fuel cost of the heating furnace or the restriction of the heating furnace, a temperature gradient occurs in the longitudinal direction (particularly, the gradient increases at the tip end).
In this case, in the instantaneous value setting, there is a possibility that the sheet thickness is greatly deteriorated, and a high-response AGC or a sheet thickness gauge close to the mill is required. Although the average value setting cannot compensate for the high plate thickness accuracy, the plate thickness does not significantly deteriorate even when the tip has a temperature gradient as described above. As a method of responding to the temperature gradient in the average value setting, for example, a method for controlling the thickness of a hot rolling apparatus described in JP-A-6-142741 (hereinafter referred to as Reference 1) and JP-A-8-155524. (Hereafter, Reference Publication 2
), A method for estimating the temperature of the front end portion of a steel sheet in hot rolling. In the method for controlling the thickness of a hot rolling apparatus described in the above-mentioned reference 1, the rolling position is corrected based on the difference between the temperature at the tip and the temperature at the steady part, which are collected by a thermometer installed on the entrance side of the rolling mill. Further, in the method for predicting the temperature at the tip end of a steel sheet in hot rolling described in the above-mentioned reference 2, the heat conduction equation using the position in the thickness direction and the position in the longitudinal direction of the steel sheet as independent variables, boundary conditions, and initial conditions are used. Based on this, the temperature at the tip is calculated.
【０００３】[0003]
【発明が解決しようとする課題】上記参照公報１に記載
の熱間圧延装置の板厚制御方法では，温度計を用いて板
温度を計測する必要があるが，動く板の端部の温度を正
確に計測することは非常に難しい。また，たとえ温度計
で材料の表面温度を正確に計測できたとしても，鋼板の
場合は，板厚方向の温度勾配が大きいため，先端部の圧
下位置修正量を正確に計算することは困難である。ま
た，上記参照公報２に記載の熱間圧延における鋼板先端
部の温度予測方法ににおいても，初期値を決定するため
には温度計の情報が必要となり，上記参照公報１に記載
の熱間圧延装置の板厚制御方法と同様の問題を生じる。
本発明は，このような従来の技術における課題を解決す
るために，予め採取された被圧延材の長手方向の平均温
度に基づいて，被圧延材を通過させる前に熱間圧延機の
ロールギャップ又はこれに対応した値を含む平均セット
アップ値を求め，該平均セットアップ値を用いて上記熱
間圧延機の設定を行う熱間圧延機のセットアップ方法に
おいて，前パス圧延時の上記被圧延材の温度に対応する
温度対応量が予測可能な所定の実績圧延情報の長手方向
分布に基づいて，当該パス圧延に対する上記平均セット
アップ値を修正した修正セットアップ値を算出し，該修
正セットアップ値により当該パス圧延時の上記熱間圧延
機の設定を行うことにより，被圧延材の長手方向に温度
勾配がある場合でも，温度計を用いることなく，被圧延
材の先端部の板厚を高精度に制御することが可能な熱間
圧延機のセットアップ方法を提供することを目的とする
ものである。In the method for controlling the thickness of a hot rolling apparatus described in the above-mentioned reference 1, it is necessary to measure the sheet temperature using a thermometer. It is very difficult to measure accurately. Even if the surface temperature of the material can be accurately measured with a thermometer, it is difficult to accurately calculate the amount of correction at the tip of the steel sheet because the temperature gradient in the thickness direction is large for steel sheets. is there. Also, in the method for predicting the temperature of the front end portion of a steel sheet in hot rolling described in the above-mentioned reference 2, information of a thermometer is required to determine an initial value. The same problem as the method for controlling the thickness of the apparatus occurs.
SUMMARY OF THE INVENTION In order to solve the problems in the prior art, the present invention is based on the average temperature in the longitudinal direction of a material to be rolled which has been sampled in advance and before the material to be rolled is passed through a roll gap of a hot rolling mill. Alternatively, an average setup value including a value corresponding to the average setup value is obtained, and in the hot rolling mill setup method of setting the hot rolling mill using the average setup value, the temperature of the material to be rolled during the pre-pass rolling is determined. A corrected setup value obtained by correcting the average setup value for the pass rolling is calculated based on the longitudinal distribution of predetermined actual rolling information that can predict the temperature corresponding amount corresponding to the temperature, and the corrected setup value is calculated based on the corrected setup value. By setting the above hot rolling mill, even if there is a temperature gradient in the longitudinal direction of the material to be rolled, the sheet thickness at the tip of the material to be rolled can be obtained without using a thermometer. It is an object to provide a setup of the hot rolling mill can be controlled with high precision.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に，請求項１に係る発明は，予め採取された被圧延材の
長手方向の平均温度に基づいて，被圧延材を通過させる
前に熱間圧延機のロールギャップ又はこれに対応した値
を含む平均セットアップ値を求め，該平均セットアップ
値を用いて上記熱間圧延機の設定を行う熱間圧延機のセ
ットアップ方法において，前パス圧延時の上記被圧延材
の温度に対応する温度対応量が予測可能な所定の実績圧
延情報の長手方向分布に基づいて，当該パス圧延に対す
る上記平均セットアップ値を修正した修正セットアップ
値を算出し，該修正セットアップ値により当該パス圧延
時の上記熱間圧延機の設定を行うことを特徴とする熱間
圧延機のセットアップ方法として構成されている。ま
た，請求項２に係る発明は，上記請求項１に記載の熱間
圧延機のセットアップ方法において，上記実績圧延情報
が，荷重，及び出側板厚を少なくとも含むものであり，
上記荷重，及び出側板厚の長手方向分布に基づいて，上
記温度対応量である塑性係数の長手方向分布を予測し，
該予測した塑性係数の長手方向分布に含まれる被圧延材
先端部の塑性係数と定常部の塑性係数とに基づいて，ギ
ャップ修正量を算出し，該ギャップ修正量により当該パ
ス圧延に対する上記平均セットアップ値を修正してなる
ことをその要旨とする。また，請求項３に係る発明は，
上記請求項１に記載の熱間圧延機のセットアップ方法に
おいて，上記実績圧延情報が，ロールギャップ又はこれ
に対応した値，入側板厚，及び出側板厚を少なくとも含
むものであり，上記ロールギャップ又はこれに対応した
値，入側板厚，及び出側板厚の長手方向分布に基づい
て，上記温度対応量である塑性係数の長手方向分布を予
測し，該予測した塑性係数の長手方向分布に含まれる被
圧延材先端部の塑性係数と定常部の塑性係数とに基づい
て，ギャップ修正量を算出し，該ギャップ修正量により
当該パス圧延に対する上記平均セットアップ値を修正し
てなることをその要旨とする。また，請求項４に係る発
明は，上記請求項１に記載の熱間圧延機のセットアップ
方法において，上記実績圧延情報が，荷重，入側板厚，
及び出側板厚を少なくとも含むものであり，上記荷重，
入側板厚，及び出側板厚の長手方向分布に基づいて，被
圧延材の温度の長手方向分布を予測し，該予測した被圧
延材の温度の長手方向分布に含まれる被圧延材先端部の
温度と定常部の温度とに基づいて，ギャップ修正量を算
出し，該ギャップ修正量により当該パス圧延に対する上
記平均セットアップ値を修正してなることをその要旨と
する。また，請求項５に係る発明は，上記請求項１に記
載の熱間圧延機のセットアップ方法において，上記実績
圧延情報が，荷重，入側板厚，及び出側板厚を少なくと
も含むものであり，上記荷重，入側板厚，及び出側板厚
の長手方向分布に基づいて，上記温度対応量である被圧
延材の変形抵抗の長手方向分布を予測し，該予測した変
形抵抗の長手方向分布に含まれる被圧延材先端部の変形
抵抗と定常部の変形抵抗とに基づいて，ギャップ修正量
を算出し，該ギャップ修正量により当該パス圧延に対す
る上記平均セットアップ値を修正してなることをその要
旨とする。上記請求項１〜５のいずれかに記載の熱間圧
延機のセットアップ方法によれば，予め採取された被圧
延材の長手方向の平均温度に基づいて，被圧延材を通過
させる前に熱間圧延機のロールギャップ又はこれに対応
した値を含む平均セットアップ値を求め，該平均セット
アップ値を用いて上記熱間圧延機の設定を行う熱間圧延
機のセットアップ方法において，前パス圧延時の上記被
圧延材の温度に対応する温度対応量が予測可能な所定の
実績圧延情報の長手方向分布に基づいて，当該パス圧延
に対する上記平均セットアップ値を修正した修正セット
アップ値を算出し，該修正セットアップ値により当該パ
ス圧延時の上記熱間圧延機の設定を行うことにより，被
圧延材の長手方向に温度勾配がある場合でも，温度計を
用いることなく，被圧延材の先端部から板厚を高精度に
制御することができる。また，その結果，高価な高応答
ＡＧＣ等を設ける必要もなくなる。しかも，塑性係数の
長手方向分布を求める場合には，温度勾配だけでなく，
板厚やその他の外乱の分布をも考慮することができる。To achieve the above object, the invention according to claim 1 is based on the average temperature in the longitudinal direction of the material to be rolled beforehand, before passing the material to be rolled. In a hot rolling mill setup method in which a roll gap of a hot rolling mill or an average setup value including a value corresponding to the roll gap is determined and the hot rolling mill is set using the average setup value, in a hot rolling mill setup method, Calculating a corrected setup value obtained by correcting the average setup value for the pass rolling based on the longitudinal distribution of predetermined actual rolling information for which a temperature corresponding amount corresponding to the temperature of the material to be rolled can be predicted. The hot rolling mill is set up by setting up the hot rolling mill at the time of the pass rolling according to the setup value. According to a second aspect of the present invention, in the hot rolling mill set-up method according to the first aspect, the actual rolling information includes at least a load and an exit side thickness.
Predict the longitudinal distribution of the plasticity coefficient, which is the above-mentioned temperature-corresponding amount, based on the above-mentioned load and the longitudinal distribution of the outlet plate thickness,
A gap correction amount is calculated based on the plastic coefficient of the tip end of the material to be rolled and the plastic coefficient of the steady portion included in the longitudinal distribution of the predicted plastic coefficient, and the average setup for the pass rolling is calculated based on the gap correction amount. The gist is to modify the value. The invention according to claim 3 is:
2. The hot rolling mill set-up method according to claim 1, wherein the actual rolling information includes at least a roll gap or a value corresponding to the roll gap, an inlet-side sheet thickness, and an outlet-side sheet thickness. The longitudinal distribution of the plastic coefficient, which is the above-mentioned temperature-corresponding amount, is predicted based on the corresponding values, the longitudinal distribution of the inlet-side plate thickness, and the outlet-side plate thickness, and is included in the predicted longitudinal distribution of the plastic coefficient. The gist is that a gap correction amount is calculated based on a plastic coefficient of a leading end portion of a material to be rolled and a plastic coefficient of a steady portion, and the average setup value for the pass rolling is corrected by the gap correction amount. . According to a fourth aspect of the present invention, in the method for setting up a hot rolling mill according to the first aspect, the actual rolling information includes a load, an entry side thickness,
And at least the exit side plate thickness.
The longitudinal distribution of the temperature of the material to be rolled is predicted on the basis of the longitudinal distribution of the thickness of the inlet side and the thickness of the outlet side. The gist is that a gap correction amount is calculated based on the temperature and the temperature of the steady portion, and the average setup value for the pass rolling is corrected by the gap correction amount. According to a fifth aspect of the present invention, in the hot rolling mill set-up method according to the first aspect, the actual rolling information includes at least a load, an entry side plate thickness, and an exit side plate thickness. The longitudinal distribution of the deformation resistance of the material to be rolled, which is the above-mentioned temperature-corresponding amount, is included in the longitudinal distribution of the deformation resistance based on the longitudinal distribution of the load, the inlet-side plate thickness, and the outlet-side plate thickness. The gist is that a gap correction amount is calculated based on the deformation resistance of the leading end portion of the material to be rolled and the deformation resistance of the steady portion, and the average setup value for the pass rolling is corrected by the gap correction amount. . According to the method for setting up a hot rolling mill according to any one of claims 1 to 5, a hot rolling mill is prepared before passing through a material to be rolled, based on an average temperature in a longitudinal direction of the material to be rolled collected in advance. An average setup value including a roll gap of a rolling mill or a value corresponding thereto is obtained, and in the hot rolling mill setup method of setting the hot rolling mill using the average setup value, A corrected setup value obtained by correcting the average setup value for the pass rolling is calculated based on a longitudinal distribution of predetermined actual rolling information in which a temperature corresponding amount corresponding to a temperature of a material to be rolled can be predicted, and the corrected setup value is calculated. By setting the hot rolling mill at the time of the pass rolling, even if there is a temperature gradient in the longitudinal direction of the material to be rolled, the material to be rolled can be used without using a thermometer. It is possible to control the thickness with high accuracy from the end. As a result, there is no need to provide an expensive high response AGC or the like. Moreover, when obtaining the longitudinal distribution of the plasticity coefficient, not only the temperature gradient,
The distribution of thickness and other disturbances can also be considered.
【０００５】[0005]
【発明の実施の形態】以下，添付図面を参照して，本発
明の実施の形態につき説明し，本発明の理解に供する。
尚，以下の実施の形態は，本発明の具体的な例であっ
て，本発明の技術的範囲を限定するものではない。本発
明の実施の形態に係る熱間圧延機のセットアップ方法
は，予め採取された被圧延材の長手方向の平均温度に基
づいて，被圧延材を通過させる前に熱間圧延機のロール
ギャップ又はこれに対応した値を含む平均セットアップ
値を求め，該平均セットアップ値を用いて上記熱間圧延
機の設定を行う点で従来方法と同様である。被圧延材先
端部では，その長手方向に温度勾配が生じるため，板厚
に対する高い制御精度を得るために，従来方法では，実
際に温度を検出する必要があったが，正確な温度測定が
難しいため，適正にセットアップ値を修正できない場合
があった。一方，本発明の実施の形態に係る熱間圧延機
のセットアップ方法が，従来方法と相違するのは，前パ
ス圧延時の上記被圧延材の温度に対応する温度対応量が
予測可能な所定の実績圧延情報の長手方向分布に基づい
て，当該パス圧延に対する上記平均セットアップ値を修
正した修正セットアップ値を算出し，該修正セットアッ
プ値により当該パス圧延時の上記熱間圧延機の設定を行
う点である。そして，本発明の実施の形態に係る熱間圧
延機のセットアップ方法と従来方法との相違点をより具
体的にした，第１の熱間圧延機のセットアップ方法は，
本発明の請求項４に係る発明に対応するものであって，
上記実績圧延情報に，荷重，入側板厚，及び出側板厚を
少なくとも含み，上記荷重，入側板厚，及び出側板厚の
長手方向分布に基づいて，板温度の長手方向分布を予測
し，該予測した板温度の長手方向分布に含まれる，被圧
延材先端部の板温度と定常部との板温度の差からギャッ
プ修正量を算出し，前パス圧延時に用いた上記セットア
ップ値を修正するものである。ここで，図１は上記第１
の熱間圧延機のセットアップ方法を実施するのに適当な
熱間圧延機のセットアップ装置１を説明するための図で
ある。上記セットアップ装置１は，例えば，粗圧延機１
００による粗圧延が終了した後の，被圧延材（以下，板
という）２の仕上げ圧延を行う可逆式の仕上圧延機１０
１を対象とするものであり，通板前に圧下装置３に指令
を与えて圧下位置Ｓを設定し，上下ワークロール４ａ，
４ｂ間のロールギャップを調整したり，ロール速度を設
定する。上ワークロール４ａを支承するバックアップロ
ール４１ａの上方には，ロードセル５，位置計６が設け
られており，それぞれから圧延荷重Ｐ，及び上記ロール
ギャップ（圧下位置Ｓと対応）が，上記セットアップ装
置１へ供給される。上記セットアップ装置１には，この
他，板２の出側板厚ｈを検出するための板厚検出器７，
板２の入側板厚Ｈを検出するための板厚検出器８が接続
されている。Embodiments of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
Note that the following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention. The method for setting up the hot rolling mill according to the embodiment of the present invention is based on the average temperature in the longitudinal direction of the material to be rolled which has been sampled in advance, before the material to be rolled is passed through the roll gap or the hot rolling mill. This is the same as the conventional method in that an average setup value including a value corresponding to this is determined, and the hot rolling mill is set using the average setup value. At the tip of the material to be rolled, a temperature gradient occurs in the longitudinal direction, so in order to obtain high control accuracy for the thickness, it was necessary to actually detect the temperature with the conventional method, but it is difficult to measure the temperature accurately As a result, the setup values could not be properly corrected. On the other hand, the setup method of the hot rolling mill according to the embodiment of the present invention is different from the conventional method in that a predetermined temperature corresponding amount corresponding to the temperature of the material to be rolled during the pre-pass rolling can be predicted. Based on the longitudinal distribution of the actual rolling information, a corrected setup value obtained by correcting the average setup value for the pass rolling is calculated, and the hot rolling mill at the time of the pass rolling is set by the corrected setup value. is there. The first hot rolling mill set-up method, in which the differences between the hot rolling mill set-up method according to the embodiment of the present invention and the conventional method are more concretely described,
It corresponds to the invention according to claim 4 of the present invention,
The above-mentioned actual rolling information includes at least the load, the entry side thickness, and the exit side thickness, and predicts the longitudinal distribution of the sheet temperature based on the longitudinal distribution of the load, the entry side thickness, and the exit side thickness. Calculates the gap correction amount from the difference between the plate temperature at the tip end of the material to be rolled and the plate temperature between the steady portion and the roll, which is included in the predicted distribution of the plate temperature in the longitudinal direction, and corrects the set-up value used during the previous pass rolling It is. Here, FIG.
FIG. 2 is a diagram for explaining a hot rolling mill set-up device 1 suitable for performing the hot rolling mill set-up method of FIG. The setup device 1 is, for example, a rough rolling mill 1
After finishing the rough rolling with the steel sheet No. 00, a reversible finishing mill 10 for finish rolling the material to be rolled (hereinafter referred to as a plate) 2
1, a command is given to the screw-down device 3 before the sheet is passed, the screw-down position S is set, and the upper and lower work rolls 4a,
Adjust the roll gap between 4b and set the roll speed. A load cell 5 and a position meter 6 are provided above the backup roll 41a that supports the upper work roll 4a, and a rolling load P and the roll gap (corresponding to the rolling position S) are respectively provided from the set-up device 1 by the load cell 5. Supplied to In addition to the above, the setup device 1 includes a thickness detector 7 for detecting the thickness h of the delivery side of the plate 2,
A board thickness detector 8 for detecting the board thickness H on the entry side of the board 2 is connected.
【０００６】以下，上記セットアップ装置１の第１の動
作，即ち本発明の実施の形態に係る第１の熱間圧延機の
セットアップ方法について説明する。仕上圧延機１０１
のはじめの圧下位置Ｓは，従来方法と同様に通板前にセ
ットアップされる。即ち，予め板の先端から定常部まで
に相当する位置で，温度等が計測され，板の長手方向の
平均温度などに基づいて，上記圧下装置３に対する圧下
位置Ｓの平均セットアップ値が計算される。尚，通板後
は図示しないＡＧＣによりフィードバック制御が行われ
る。上記したはじめの圧下位置Ｓの平均セットアップ値
を用いて，上記仕上圧延機１０１により板２に対して２
パスの圧延が行われる。この２パスの圧延中に，ロード
セル５，板厚検出器７により，圧延荷重Ｐ，出側板厚ｈ
の長手方向分布がそれぞれ計測される。そして，採取さ
れた圧延荷重Ｐ，出側板厚ｈのデータについて，データ
の先後端が特定され，圧延中の部分が切り出される。ノ
イズ除去のため所定のフィルタリングが施された後，こ
れら圧延荷重データと出側板厚データのデータ長が異な
る場合には，マルチレート信号処理の手法を用いてデー
タ長が揃えられる。また，入側板厚Ｈが，２パスのうち
のはじめのパスの出側板厚から定められる。次に，これ
ら３つの時系列データを用い，例えば次式（１）に従っ
て，板温度Ｔの長手方向分布が計算される。Hereinafter, a first operation of the setup apparatus 1, that is, a setup method of a first hot rolling mill according to an embodiment of the present invention will be described. Finishing mill 101
Is set up before threading as in the conventional method. That is, a temperature or the like is measured in advance at a position corresponding to a portion from the tip of the plate to the steady portion, and an average setup value of the rolling position S with respect to the rolling device 3 is calculated based on the average temperature in the longitudinal direction of the plate. . After passing the sheet, feedback control is performed by an AGC (not shown). Using the above average setup value of the initial rolling position S, the finishing mill 101 applies 2
Rolling of the pass is performed. During the rolling of the two passes, the load cell 5 and the thickness detector 7 determine the rolling load P and the output side thickness h.
Are measured in the longitudinal direction. Then, with respect to the collected data of the rolling load P and the exit side plate thickness h, the leading and trailing ends of the data are specified, and the part being rolled is cut out. After predetermined filtering for noise removal, if the data lengths of the rolling load data and the exit side thickness data are different, the data lengths are made uniform by using a multi-rate signal processing technique. Further, the entrance side thickness H is determined from the exit side thickness of the first pass of the two passes. Next, using these three time-series data, the longitudinal distribution of the plate temperature T is calculated according to, for example, the following equation (1).
【数１】 ただし，Ｒｄは偏平ロール半径，Ｂは板幅，Ｋｐは変形
抵抗，Ｑｐは圧下力関数，Ｔは温度，Ｒはロール半径，
添字ｉは時間あるいは長手方向位置の順番を表し，
Ａ1 ，Ａ2 ，ｃ，ｍ，ｎは係数である。図２に上式
（１）に従って計算した板温度の長手方向分布の一例を
示す。図２の縦軸が板温度であり，横軸が長手方向の位
置である。次に，求められた板温度Ｔの分布から定常部
の温度Ｔｍと先端部の温度Ｔｔとが求められる。加熱炉
内のスキッド配置や板の絶対長等によって変わるが，こ
の定常部の温度Ｔｍと先端部の温度Ｔｔとは，例えば板
全長を７分割し，先端の２区画の平均を上記温度Ｔｔと
し，中央部３区画の平均を上記温度Ｔｍとして求めるこ
とができる。次に，上式（１）の温度Ｔに，上記温度Ｔ
ｔ，Ｔｍが，また上式（１）の入側板厚Ｈ，出側板厚
ｈ，板幅Ｂに，１パス目に採取された出側板厚ｈの平均
値あるいは先端部での値，次パス目出側板厚目標値，次
パス板幅がそれぞれ代入され，定常部予測荷重Ｐｍと先
端部予測荷重Ｐｔとが計算される。そして，次式（２）
に従って，３パス目の圧下位置Ｓに関する平均セットア
ップ値に対して圧下位置修正量ｄＳが算出され，圧下位
置Ｓに関する修正セットアップ値Ｓ＋ｄＳが求められ
る。(Equation 1) Here, Rd is the flat roll radius, B is the plate width, Kp is the deformation resistance, Qp is the rolling force function, T is the temperature, R is the roll radius,
The subscript i represents the order of time or longitudinal position,
A 1 , A 2 , c, m, and n are coefficients. FIG. 2 shows an example of the plate temperature distribution in the longitudinal direction calculated according to the above equation (1). The vertical axis in FIG. 2 is the plate temperature, and the horizontal axis is the position in the longitudinal direction. Next, the temperature Tm of the steady portion and the temperature Tt of the tip portion are obtained from the obtained distribution of the plate temperature T. The temperature Tm of the stationary part and the temperature Tt of the tip part are, for example, divided into seven parts of the plate length, and the average of two sections at the tip is defined as the temperature Tt. , The average of the three central sections can be obtained as the temperature Tm. Next, the above temperature T is added to the temperature T in the above equation (1).
t, Tm are the average value of the exit side plate thickness h sampled in the first pass or the value at the tip end, the next pass, in the entry side plate thickness H, exit side plate thickness h, and plate width B in the above equation (1). The target plate thickness and the next pass plate width are respectively substituted, and the steady portion predicted load Pm and the tip predicted load Pt are calculated. Then, the following equation (2)
, The roll-down position correction amount dS is calculated with respect to the average setup value for the roll-down position S in the third pass, and the corrected setup value S + dS for the roll-down position S is obtained.
【数２】 ただし，Ｇはゲイン，Ｍはミル定数を表す。このような
手順で，各パス圧延時にデータが採取され，それに基づ
き計算が行われ，圧下位置に関する上記平均セットアッ
プ値が順次修正される。(Equation 2) Here, G represents a gain and M represents a mill constant. In such a procedure, data is collected at each pass rolling, a calculation is performed based on the data, and the average setup value for the rolling position is sequentially corrected.
【０００７】次に，本発明の実施の形態に係る熱間圧延
機のセットアップ方法と従来方法との相違点をより具体
的にした，第２の熱間圧延機のセットアップ方法は，本
発明の請求項２に係る発明に対応するものであって，上
記実績圧延情報が，荷重，及び出側板厚を少なくとも含
むものであり，上記荷重，及び出側板厚の長手方向分布
に基づいて，塑性係数の長手方向分布を予測し，該予測
した塑性係数の長手方向分布に含まれる被圧延材先端部
の塑性係数と定常部の塑性係数とに基づいて，ギャップ
修正量を算出し，該ギャップ修正量により当該パス圧延
に対する上記平均セットアップ値を修正するものであ
る。以下，上記セットアップ装置１の第２の動作，即ち
本発明の実施の形態に係る第２の熱間圧延機のセットア
ップ方法について説明する。仕上圧延機１０１のはじめ
の圧下位置Ｓに，上記平均セットアップ値が用いられる
のは，上記した各例と同様である。このはじめの圧下位
置Ｓの平均セットアップ値を用いて，上記仕上圧延機１
０１により板２に対して１パスの圧延が行われる点は，
上記第１の熱間圧延機のセットアップ方法と異なる。上
記１パスの圧延中には，ロードセル５，板厚検出器７に
より，圧延荷重Ｐ，出側板厚ｈの長手方向分布がそれぞ
れ計測される。平均セットアップ値を用いて２パスの圧
延が行われず，１パスのみの圧延ですむのは，上記圧下
位置修正量ｄＳを求めるのに，上記第２の熱間圧延機の
セットアップ方法では，入側板厚Ｈを用いないからであ
る。そして，採取された圧延荷重Ｐ，出側板厚ｈのデー
タについて，データの先後端が特定され，圧延中の部分
が切り出される。ノイズ除去のため所定のフィルタリン
グが施された後，これら圧延荷重データ，圧下位置デー
タ，出側板厚データのデータ長が異なる場合には，マル
チレート信号処理の手法を用いてデータ長が揃えられ
る。次に，これら２つの時系列データを用い，例えば次
式（３）に従って，塑性係数（温度対応量）Ｑの長手方
向分布が計算される。Next, a second hot rolling mill set-up method according to an embodiment of the present invention, in which the differences between the hot rolling mill set-up method according to the embodiment of the present invention and the conventional method are more specifically described. Claim 2 corresponds to the invention according to claim 2, wherein the actual rolling information includes at least a load and an exit side plate thickness, and a plasticity coefficient based on the load and the distribution of the exit side plate thickness in the longitudinal direction. And the gap correction amount is calculated based on the plastic coefficient of the tip end of the material to be rolled and the plastic coefficient of the steady portion included in the longitudinal distribution of the predicted plastic coefficient. To correct the average setup value for the pass rolling. Hereinafter, a second operation of the setup apparatus 1, that is, a setup method of the second hot rolling mill according to the embodiment of the present invention will be described. The average setup value is used for the initial rolling position S of the finishing mill 101 as in the above-described examples. Using the average setup value of the initial rolling-down position S, the finishing mill 1
The point that rolling of sheet 1 is performed on sheet 2 by 01 is as follows.
This is different from the setup method of the first hot rolling mill. During the one-pass rolling, the load cell 5 and the thickness detector 7 measure the longitudinal distribution of the rolling load P and the delivery thickness h, respectively. The rolling of only one pass is not performed using the average set-up value and the rolling of only one pass is required. In order to obtain the above-mentioned rolling position correction amount dS, in the second hot rolling mill set-up method, the entry side thickness H Is not used. Then, with respect to the collected data of the rolling load P and the exit side plate thickness h, the leading and trailing ends of the data are specified, and the part being rolled is cut out. After predetermined filtering is performed to remove noise, if the data lengths of the rolling load data, the rolling position data, and the exit side thickness data are different, the data lengths are aligned using a multi-rate signal processing technique. Next, using these two time-series data, a longitudinal distribution of a plasticity coefficient (amount corresponding to temperature) Q is calculated according to, for example, the following equation (3).
【数３】 次に，求められた塑性係数Ｑの分布から定常部の塑性係
数Ｑｍと先端部の塑性係数Ｑｔとが求められる。塑性係
数Ｑについても，上記温度Ｔと同様に，例えば板全長を
７分割し，先端の２区画の平均を上記塑性係数Ｑｔと
し，中央部３区画の平均を上記塑性係数Ｑｍとして求め
ることができる。そして，次式（４）に従って，２パス
目の圧下位置Ｓに関する平均セットアップ値に対して圧
下位置修正量ｄＳが算出され，圧下位置Ｓに関する修正
セットアップ値Ｓ＋ｄＳが求められる。(Equation 3) Next, a plastic coefficient Qm of the stationary part and a plastic coefficient Qt of the tip part are obtained from the distribution of the obtained plastic coefficient Q. Similarly to the temperature T, the plastic coefficient Q can be obtained, for example, by dividing the total length of the plate into seven, averaging two sections at the tip as the plastic coefficient Qt, and averaging the central three sections as the plastic coefficient Qm. . Then, according to the following equation (4), the roll-down position correction amount dS is calculated with respect to the average setup value for the roll-down position S in the second pass, and the corrected setup value S + dS for the roll-down position S is obtained.
【数４】 このような手順で，各パス圧延時にデータが採取され，
それに基づき計算が行われ，圧下位置Ｓに関する上記平
均セットアップ値が順次修正される。(Equation 4) In this way, data is collected during each pass rolling,
A calculation is performed based thereon, and the average set-up value for the rolling-down position S is sequentially corrected.
【０００８】次に，本発明の実施の形態に係る熱間圧延
機のセットアップ方法と従来方法との相違点をより具体
的にした，第３の熱間圧延機のセットアップ方法は，本
発明の請求項３に係る発明に対応するものであって，上
記実績圧延情報が，ロールギャップ又はこれに対応した
値，入側板厚，及び出側板厚を少なくとも含むものであ
り，上記ロールギャップ又はこれに対応した値，入側板
厚，及び出側板厚の長手方向分布に基づいて，塑性係数
の長手方向分布を予測し，該予測した塑性係数の長手方
向分布に含まれる被圧延材先端部の塑性係数と定常部の
塑性係数とに基づいて，ギャップ修正量を算出し，該ギ
ャップ修正量により当該パス圧延に対する上記平均セッ
トアップ値を修正するものである。以下，上記セットア
ップ装置１の第３の動作，即ち本発明の実施の形態に係
る第３の熱間圧延機のセットアップ方法について説明す
る。仕上圧延機１０１のはじめの圧下位置Ｓに，上記平
均セットアップ値が用いられるのは，上記した各例と同
様である。このはじめの圧下位置Ｓの平均セットアップ
値を用いて，上記第１の熱間圧延機のセットアップ方法
と同様，上記仕上圧延機１０１により板２に対して２パ
スの圧延が行われる。この２パスの圧延中に，ロードセ
ル５，位置計６，板厚検出器７により，圧延荷重Ｐ，ロ
ールギャップに対応した圧下位置Ｓ，出側板厚ｈの長手
方向分布がそれぞれ計測される。そして，採取された圧
延荷重Ｐ，圧下位置Ｓ，出側板厚ｈのデータについて，
データの先後端が特定され，圧延中の部分が切り出され
る。ノイズ除去のため所定のフィルタリングが施された
後，これら圧延荷重データ，圧下位置データ，出側板厚
データのデータ長が異なる場合には，マルチレート信号
処理の手法を用いてデータ長が揃えられる。また，入側
板厚Ｈは，２パスのうちのはじめのパスの出側板厚ｈか
ら定められる。次に，これら４つの時系列データを用
い，例えば次式（５）に従って，塑性係数Ｑの長手方向
分布が計算される。Next, a third hot rolling mill set-up method according to the present invention, in which the differences between the hot rolling mill set-up method according to the embodiment of the present invention and the conventional method are more specifically described. Claim 3 corresponds to the invention according to claim 3, wherein the actual rolling information includes at least a roll gap or a value corresponding to the roll gap, an inlet-side sheet thickness, and an outlet-side sheet thickness. The longitudinal distribution of the plastic coefficient is predicted based on the corresponding values, the longitudinal distributions of the inlet side thickness and the exit side thickness, and the plasticity coefficient at the tip end of the rolled material included in the predicted longitudinal distribution of the plastic coefficient. A gap correction amount is calculated based on the and the plastic coefficient of the steady portion, and the average setup value for the pass rolling is corrected by the gap correction amount. Hereinafter, a third operation of the setup apparatus 1, that is, a third hot rolling mill set-up method according to the embodiment of the present invention will be described. The average setup value is used for the initial rolling position S of the finishing mill 101 as in the above-described examples. Using the average setup value of the initial rolling-down position S, the finishing mill 101 performs two-pass rolling on the sheet 2 in the same manner as in the setup method of the first hot rolling mill. During the rolling of the two passes, the load cell 5, the position meter 6, and the thickness detector 7 measure the rolling load P, the rolling position S corresponding to the roll gap, and the longitudinal distribution of the exit side thickness h, respectively. Then, for the collected data of the rolling load P, the rolling position S, and the exit side plate thickness h,
The leading and trailing edges of the data are specified, and the part being rolled is cut out. After the predetermined filtering for removing noise, if the data lengths of the rolling load data, the rolling position data, and the exit side thickness data are different, the data lengths are made uniform using a multi-rate signal processing technique. Further, the entrance side thickness H is determined from the exit side thickness h of the first pass of the two passes. Next, the longitudinal distribution of the plasticity coefficient Q is calculated using these four time series data, for example, according to the following equation (5).
【数５】 図３に上式（５）に従って計算した塑性係数の長手方向
分布の一例を示す。図３の縦軸が塑性係数であり，横軸
が長手方向の位置である。次に，求められた塑性係数Ｑ
の分布から，上記第２の熱間圧延機のセットアップ方法
と同様に，定常部の塑性係数Ｑｍと先端部の塑性係数Ｑ
ｔとが求められる。そして，圧下位置修正量ｄＳも，上
記した第２の熱間圧延機のセットアップ方法と同様に，
上式（４）によって表される。上式（４）の塑性係数Ｑ
ｔ，Ｑｍに上記のように求めた塑性係数Ｑｔ，Ｑｍを，
上式（４）の入側板厚Ｈ，出側板厚ｈに，１パス目に採
取された出側板厚の平均値あるいは先端部での値，次パ
ス目標出側板厚をそれぞれ代入することにより，３パス
目の圧下位置Ｓに関する平均セットアップ値に対して，
上記圧下位置修正量ｄＳが算出され，圧下位置Ｓに関す
る修正セットアップ値Ｓ＋ｄＳが求められる。このよう
な手順で，各パス圧延時にデータが採取され，それに基
づき計算が行われ，圧下位置Ｓに関する上記平均セット
アップ値が順次修正される。(Equation 5) FIG. 3 shows an example of the longitudinal distribution of the plasticity coefficient calculated according to the above equation (5). The vertical axis in FIG. 3 is the plasticity coefficient, and the horizontal axis is the position in the longitudinal direction. Next, the obtained plasticity coefficient Q
Of the plastic coefficient Qm of the stationary part and the plastic coefficient Q of the tip part in the same manner as in the setup method of the second hot rolling mill described above.
t is required. Then, the rolling position correction amount dS is also determined in the same manner as the above-described second hot rolling mill set-up method.
It is represented by the above equation (4). The plasticity coefficient Q of the above equation (4)
The plasticity coefficients Qt and Qm obtained as described above are substituted for t and Qm, respectively.
By substituting the average value or the value at the tip end of the exit-side plate thickness sampled in the first pass and the target exit-side plate thickness in the next pass into the entrance-side plate thickness H and the exit-side plate thickness h in the above equation (4), respectively. For the average setup value for the rolling position S in the third pass,
The rolling position correction amount dS is calculated, and a corrected setup value S + dS for the rolling position S is obtained. In such a procedure, data is collected at each pass rolling, a calculation is performed based on the data, and the average setup value for the rolling position S is sequentially corrected.
【０００９】次に，本発明の実施の形態に係る熱間圧延
機のセットアップ方法と従来方法との相違点をより具体
的にした，第４の熱間圧延機のセットアップ方法は，本
発明の請求項５に係る発明に対応するものであって，上
記実績圧延情報が，荷重，入側板厚，及び出側板厚を少
なくとも含むものであり，上記荷重，入側板厚，及び出
側板厚の長手方向分布に基づいて，被圧延材の変形抵抗
の長手方向分布を予測し，該予測した変形抵抗の長手方
向分布に含まれる被圧延材先端部の変形抵抗と定常部の
変形抵抗とに基づいて，ギャップ修正量を算出し，該ギ
ャップ修正量により当該パス圧延に対する上記平均セッ
トアップ値を修正するものである。以下，上記セットア
ップ装置１の第４の動作，即ち本発明の実施の形態に係
る第４の熱間圧延機のセットアップ方法について説明す
る。仕上圧延機１０１のはじめの圧下位置Ｓに，上記平
均セットアップ値が用いられるのは，上記した各例と同
様である。このはじめの圧下位置Ｓの平均セットアップ
値を用いて，上記第１，３の熱間圧延機のセットアップ
方法と同様，上記仕上圧延機１０１により板２に対して
２パスの圧延が行われる。この２パスの圧延中に，ロー
ドセル５，板厚検出器７により，圧延荷重Ｐ，出側板厚
ｈの長手方向分布がそれぞれ計測される。そして，採取
された圧延荷重Ｐ，出側板厚ｈのデータについて，デー
タの先後端が特定され，圧延中の部分が切り出される。
ノイズ除去のため所定のフィルタリングが施された後，
これら圧延荷重データ，出側板厚データのデータ長が異
なる場合には，マルチレート信号処理の手法を用いてデ
ータ長が揃えられる。また，入側板厚Ｈは，２パスのう
ちのはじめのパスの出側板厚ｈから定められる。次に，
これら３つの時系列データを用い，例えば次式（６）に
従って，変形抵抗（温度対応量）Ｋｐの長手方向分布が
計算される。Next, a fourth method for setting up a hot rolling mill according to the present invention, in which the differences between the method for setting up a hot rolling mill according to the embodiment of the present invention and the conventional method are more concretely described. According to the fifth aspect of the present invention, the actual rolling information includes at least a load, an entrance side plate thickness, and an exit side plate thickness, and the longitudinal length of the load, the entrance side plate thickness, and the exit side plate thickness is provided. The longitudinal distribution of the deformation resistance of the material to be rolled is predicted based on the direction distribution, and the deformation resistance of the tip end of the material to be rolled and the deformation resistance of the steady portion included in the predicted longitudinal distribution of the deformation resistance. , A gap correction amount, and the average setup value for the pass rolling is corrected by the gap correction amount. Hereinafter, a fourth operation of the set-up apparatus 1, that is, a fourth hot rolling mill set-up method according to the embodiment of the present invention will be described. The average setup value is used for the initial rolling position S of the finishing mill 101 as in the above-described examples. Using the average setup value at the initial rolling-down position S, the finishing mill 101 performs two-pass rolling on the sheet 2 in the same manner as the first and third hot rolling mill setup methods. During this two-pass rolling, the load cell 5 and the thickness detector 7 measure the longitudinal distribution of the rolling load P and the delivery thickness h, respectively. Then, with respect to the collected data of the rolling load P and the exit side plate thickness h, the leading and trailing ends of the data are specified, and the part being rolled is cut out.
After a certain filtering to remove noise,
If the data lengths of the rolling load data and the exit side plate thickness data are different, the data lengths are made uniform using a multi-rate signal processing technique. Further, the entrance side thickness H is determined from the exit side thickness h of the first pass of the two passes. next,
Using these three time-series data, the longitudinal distribution of deformation resistance (temperature corresponding amount) Kp is calculated according to, for example, the following equation (6).
【数６】 図４に上式（６）に従って計算した変形抵抗の長手方向
分布の一例を示す。図３の縦軸が変形抵抗であり，横軸
が長手方向の位置である。次に，求められた変形抵抗Ｋ
ｐの分布から定常部の変形抵抗Ｋｐｍと先端部の変形抵
抗Ｋｐｔとが求められる。変形抵抗Ｋについても，上記
温度Ｔや塑性係数Ｑと同様に，例えば板全長を７分割
し，先端の２区画の平均を上記変形抵抗Ｋｐｔとし，中
央部３区画の平均を上記変形抵抗Ｋｐｍとしてそれぞれ
求めることができる。次に，上式（６）の変形抵抗Ｋｐ
に，上記変形抵抗Ｋｐｔ，Ｋｐｍが，また上式（６）の
入側板厚Ｈ，出側板厚ｈ，板幅Ｂに，１パス目に採取さ
れた出側板厚ｈの平均値あるいは先端部での値，次パス
目出側板厚目標値，次パス板幅がそれぞれ代入され，定
常部予測荷重Ｐｍと先端部予測荷重Ｐｔとが計算され
る。そして，上記第１の熱間圧延機のセットアップ方法
と同様に，上式（２）に従って，３パス目の圧下位置Ｓ
に関する平均セットアップ値に対して圧下位置修正量ｄ
Ｓが算出され，圧下位置Ｓに関する修正セットアップ値
Ｓ＋ｄＳが求められる。このような手順で，各パス圧延
時にデータが採取され，それに基づき計算が行われ，圧
下位置に関する上記平均セットアップ値が順次修正され
る。(Equation 6) FIG. 4 shows an example of the longitudinal distribution of the deformation resistance calculated according to the above equation (6). The vertical axis in FIG. 3 is the deformation resistance, and the horizontal axis is the position in the longitudinal direction. Next, the determined deformation resistance K
From the distribution of p, the deformation resistance Kpm of the steady part and the deformation resistance Kpt of the tip part are obtained. As for the deformation resistance K, similarly to the temperature T and the plasticity coefficient Q, for example, the entire length of the plate is divided into seven, the average of the two sections at the tip is defined as the deformation resistance Kpt, and the average of the three central sections is defined as the deformation resistance Kpm. You can ask for each. Next, the deformation resistance Kp of the above equation (6)
In addition, the above-mentioned deformation resistances Kpt and Kpm are calculated by calculating the average value of the exit side plate thickness h sampled in the first pass or the tip end portion in the entry side plate thickness H, the exit side plate thickness h, and the plate width B in the above equation (6). , The next pass exposed side plate thickness target value, and the next pass plate width are respectively substituted, and the steady portion predicted load Pm and the tip predicted load Pt are calculated. Then, in the same manner as in the first hot rolling mill set-up method, the third pass rolling position S is calculated according to the above equation (2).
Rolling position correction amount d with respect to the average setup value
S is calculated, and a corrected setup value S + dS for the rolling-down position S is obtained. In such a procedure, data is collected at each pass rolling, a calculation is performed based on the data, and the average setup value for the rolling position is sequentially corrected.
【００１０】上記のような本発明の実施の形態に係る熱
間圧延機のセットアップ方法により，平均セットアップ
値に対して修正を行っていない場合と修正を行った場合
の出側板厚ｈの推移の実験例を図５に示す。図５に示さ
れる通り，本発明の実施の形態に係る熱間圧延機のセッ
トアップ方法により修正を行っていない場合（図５
（ａ）参照）には，制御開始から０．６秒程度まで出側
板厚ｈが安定していないが，修正を行っている場合（図
５（ｂ）参照）には，制御開始直後から，出側板厚ｈが
安定している。このように，本発明の実施の形態に係る
熱間圧延機のセットアップ方法によれば，予め採取され
た被圧延材の長手方向の平均温度に基づいて，被圧延材
を通過させる前に熱間圧延機のロールギャップ又はこれ
に対応した値を含む平均セットアップ値を求め，該平均
セットアップ値を用いて上記熱間圧延機の設定を行う熱
間圧延機のセットアップ方法において，前パス圧延時の
上記被圧延材の温度に対応する温度対応量が予測可能な
所定の実績圧延情報の長手方向分布に基づいて，当該パ
ス圧延に対する上記平均セットアップ値を修正した修正
セットアップ値を算出し，該修正セットアップ値により
当該パス圧延時の上記熱間圧延機の設定を行うことによ
り，被圧延材の長手方向に温度勾配がある場合でも，温
度計を用いることなく，被圧延材の先端部から板厚を高
精度に制御することができる。また，その結果，高価な
高応答ＡＧＣ等を設ける必要もなくなる。しかも，塑性
係数の長手方向分布を求める場合には，温度勾配だけで
なく，板厚やその他の外乱の分布をも考慮することがで
きる。According to the hot rolling mill set-up method according to the embodiment of the present invention as described above, the transition of the exit side sheet thickness h when the average setup value is not corrected and when the average setup value is corrected. An experimental example is shown in FIG. As shown in FIG. 5, the case where the hot rolling mill according to the embodiment of the present invention has not been modified by the setup method (FIG.
(See (a)), the exit side plate thickness h is not stable until about 0.6 seconds from the start of the control. However, when the correction is performed (see FIG. 5 (b)), immediately after the start of the control, The exit side plate thickness h is stable. As described above, according to the hot rolling mill set-up method according to the embodiment of the present invention, based on the average temperature in the longitudinal direction of the material to be rolled which has been sampled in advance, the hot-rolling material is heated before passing through the material to be rolled. An average setup value including a roll gap of a rolling mill or a value corresponding thereto is obtained, and in the hot rolling mill setup method of setting the hot rolling mill using the average setup value, A corrected setup value obtained by correcting the average setup value for the pass rolling is calculated based on a longitudinal distribution of predetermined actual rolling information in which a temperature corresponding amount corresponding to a temperature of a material to be rolled can be predicted, and the corrected setup value is calculated. By setting the hot rolling mill at the time of the pass rolling, even if there is a temperature gradient in the longitudinal direction of the material to be rolled, the material to be rolled can be used without using a thermometer. It is possible to control the thickness with high accuracy from the tip. As a result, there is no need to provide an expensive high response AGC or the like. In addition, when the longitudinal distribution of the plasticity coefficient is obtained, not only the temperature gradient but also the distribution of the thickness and other disturbances can be considered.
【００１１】[0011]
【発明の効果】以上説明した通り，上記請求項１〜５の
いずれかに記載の熱間圧延機のセットアップ方法によれ
ば，予め採取された被圧延材の長手方向の平均温度に基
づいて，被圧延材を通過させる前に熱間圧延機のロール
ギャップ又はこれに対応した値を含む平均セットアップ
値を求め，該平均セットアップ値を用いて上記熱間圧延
機の設定を行う熱間圧延機のセットアップ方法におい
て，前パス圧延時の上記被圧延材の温度に対応する温度
対応量が予測可能な所定の実績圧延情報の長手方向分布
に基づいて，当該パス圧延に対する上記平均セットアッ
プ値を修正した修正セットアップ値を算出し，該修正セ
ットアップ値により当該パス圧延時の上記熱間圧延機の
設定を行うことにより，被圧延材の長手方向に温度勾配
がある場合でも，温度計を用いることなく，被圧延材の
先端部から板厚を高精度に制御することができる。ま
た，その結果，高価な高応答ＡＧＣ等を設ける必要もな
くなる。しかも，塑性係数の長手方向分布を求める場合
には，温度勾配だけでなく，板厚やその他の外乱の分布
をも考慮することができる。As described above, according to the method for setting up a hot rolling mill according to any one of claims 1 to 5, based on the average temperature in the longitudinal direction of the material to be rolled collected in advance. Before passing the material to be rolled, a roll gap of the hot rolling mill or an average setup value including a value corresponding to the roll gap is determined, and the hot rolling mill is set using the average setup value to set the hot rolling mill. In the setup method, the average setup value for the pass rolling is corrected based on the longitudinal distribution of predetermined actual rolling information in which a temperature corresponding amount corresponding to the temperature of the material to be rolled during the pre-pass rolling can be predicted. By calculating the setup value and setting the hot rolling mill at the time of the pass rolling using the corrected setup value, even if there is a temperature gradient in the longitudinal direction of the material to be rolled, Without using the meter, it is possible to control the thickness with high accuracy from the tip of the material to be rolled. As a result, there is no need to provide an expensive high response AGC or the like. In addition, when the longitudinal distribution of the plasticity coefficient is obtained, not only the temperature gradient but also the distribution of the thickness and other disturbances can be considered.
【図１】 本発明の第１の実施の形態に係る熱間圧延機
のセットアップ方法を実施するのに適当なセットアップ
装置を説明するための図。FIG. 1 is a view for explaining a setup device suitable for carrying out a hot rolling mill setup method according to a first embodiment of the present invention.
【図２】 本発明の第１の実施の形態に係る熱間圧延機
のセットアップ方法で求められる板温度の長手方向分布
の一例を示す図。FIG. 2 is a diagram showing an example of a longitudinal distribution of a sheet temperature obtained by a hot rolling mill set-up method according to the first embodiment of the present invention.
【図３】 本発明の第３の実施の形態に係る熱間圧延機
のセットアップ方法で求められる塑性係数の長手方向分
布の一例を示す図。FIG. 3 is a view showing an example of a longitudinal distribution of a plastic coefficient obtained by a hot rolling mill set-up method according to a third embodiment of the present invention.
【図４】 本発明の第４の実施の形態に係る熱間圧延機
のセットアップ方法で求められる変形抵抗の長手方向分
布の一例を示す図。FIG. 4 is a diagram showing an example of a longitudinal distribution of deformation resistance obtained by a hot rolling mill set-up method according to a fourth embodiment of the present invention.
【図５】 平均セットアップ値に本発明の実施の形態に
係る熱間圧延機のセットアップ方法による修正を行う場
合と行わない場合を比較する図。FIG. 5 is a diagram comparing a case where the average setup value is corrected by the hot rolling mill setup method according to the embodiment of the present invention and a case where the correction is not performed.
１…セットアップ装置 ２…被圧延材 ３…圧下装置 ４…ワークロール ５…ロードセル ６…位置計 ７…板厚検出器 DESCRIPTION OF SYMBOLS 1 ... Setup apparatus 2 ... Rolled material 3 ... Rolling-down apparatus 4 ... Work roll 5 ... Load cell 6 ... Position meter 7 ... Sheet thickness detector
フロントページの続き (72)発明者 大江 憲一 兵庫県加古川市金沢町１番地 株式会社神 戸製鋼所加古川製鉄所内 (72)発明者 森本 禎夫 兵庫県加古川市金沢町１番地 株式会社神 戸製鋼所加古川製鉄所内 Ｆターム(参考） 4E024 AA07 BB07 CC01 CC02 DD10Continuing on the front page (72) Inventor Kenichi Oe 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Inside the Kobe Steel Works Kakogawa Works (72) Inventor Sadao Morimoto 1 Kanazawacho, Kakogawa City, Hyogo Prefecture Kobe Steel Corporation Kakogawa Works F-term (reference) in steelworks 4E024 AA07 BB07 CC01 CC02 DD10
Claims (5)
均温度に基づいて，被圧延材を通過させる前に熱間圧延
機のロールギャップ又はこれに対応した値を含む平均セ
ットアップ値を求め，該平均セットアップ値を用いて上
記熱間圧延機の設定を行う熱間圧延機のセットアップ方
法において，前パス圧延時の上記被圧延材の温度に対応
する温度対応量が予測可能な所定の実績圧延情報の長手
方向分布に基づいて，当該パス圧延に対する上記平均セ
ットアップ値を修正した修正セットアップ値を算出し，
該修正セットアップ値により当該パス圧延時の上記熱間
圧延機の設定を行うことを特徴とする熱間圧延機のセッ
トアップ方法。An average set-up value including a roll gap of a hot rolling mill or a value corresponding thereto is determined before passing the material to be rolled, based on an average temperature in the longitudinal direction of the material to be rolled which has been sampled in advance. A hot rolling mill set-up method for setting the hot rolling mill using the average set-up value, wherein a predetermined performance in which a temperature corresponding amount corresponding to the temperature of the material to be rolled during the pre-pass rolling can be predicted; Based on the longitudinal distribution of the rolling information, a corrected setup value obtained by correcting the average setup value for the pass rolling is calculated,
A method for setting up a hot rolling mill, wherein setting of the hot rolling mill at the time of the pass rolling is performed by the corrected setup value.
厚を少なくとも含むものであり，上記荷重，及び出側板
厚の長手方向分布に基づいて，上記温度対応量である塑
性係数の長手方向分布を予測し，該予測した塑性係数の
長手方向分布に含まれる被圧延材先端部の塑性係数と定
常部の塑性係数とに基づいて，ギャップ修正量を算出
し，該ギャップ修正量により当該パス圧延に対する上記
平均セットアップ値を修正してなる請求項１に記載の熱
間圧延機のセットアップ方法。2. The actual rolling information includes at least a load and an exit side plate thickness, and the longitudinal direction of the plasticity coefficient, which is the temperature corresponding amount, based on the load and the exit side plate thickness distribution in the longitudinal direction. The distribution is predicted, and the gap correction amount is calculated based on the plastic coefficient of the front end portion of the material to be rolled and the plastic coefficient of the steady part included in the longitudinal distribution of the predicted plastic coefficient. The method for setting up a hot rolling mill according to claim 1, wherein the average setup value for rolling is corrected.
はこれに対応した値，入側板厚，及び出側板厚を少なく
とも含むものであり，上記ロールギャップ又はこれに対
応した値，入側板厚，及び出側板厚の長手方向分布に基
づいて，上記温度対応量である塑性係数の長手方向分布
を予測し，該予測した塑性係数の長手方向分布に含まれ
る被圧延材先端部の塑性係数と定常部の塑性係数とに基
づいて，ギャップ修正量を算出し，該ギャップ修正量に
より当該パス圧延に対する上記平均セットアップ値を修
正してなる請求項１に記載の熱間圧延機のセットアップ
方法。3. The actual rolling information includes at least a roll gap or a value corresponding thereto, an entry side plate thickness, and an exit side plate thickness, and the roll gap or a value corresponding thereto, an entry side plate thickness, and The longitudinal distribution of the plastic coefficient, which is the above-mentioned temperature-corresponding amount, is predicted on the basis of the longitudinal distribution of the exit side thickness, and the plastic coefficient at the tip end of the material to be rolled and the steady part included in the longitudinal distribution of the predicted plastic coefficient. 2. The setup method for a hot rolling mill according to claim 1, wherein a gap correction amount is calculated based on the plastic coefficient of the hot rolling mill, and the average setup value for the pass rolling is corrected based on the gap correction amount.
及び出側板厚を少なくとも含むものであり，上記荷重，
入側板厚，及び出側板厚の長手方向分布に基づいて，被
圧延材の温度の長手方向分布を予測し，該予測した被圧
延材の温度の長手方向分布に含まれる被圧延材先端部の
温度と定常部の温度とに基づいて，ギャップ修正量を算
出し，該ギャップ修正量により当該パス圧延に対する上
記平均セットアップ値を修正してなる請求項１に記載の
熱間圧延機のセットアップ方法。4. The actual rolling information includes a load, an entry side thickness,
And at least the exit side plate thickness.
The longitudinal distribution of the temperature of the material to be rolled is predicted on the basis of the longitudinal distribution of the thickness of the inlet side and the thickness of the outlet side. 2. The hot rolling mill set-up method according to claim 1, wherein a gap correction amount is calculated based on the temperature and the temperature of the steady part, and the average setup value for the pass rolling is corrected based on the gap correction amount.
及び出側板厚を少なくとも含むものであり，上記荷重，
入側板厚，及び出側板厚の長手方向分布に基づいて，上
記温度対応量である被圧延材の変形抵抗の長手方向分布
を予測し，該予測した変形抵抗の長手方向分布に含まれ
る被圧延材先端部の変形抵抗と定常部の変形抵抗とに基
づいて，ギャップ修正量を算出し，該ギャップ修正量に
より当該パス圧延に対する上記平均セットアップ値を修
正してなる請求項１に記載の熱間圧延機のセットアップ
方法。5. The actual rolling information includes a load, an entry side thickness,
And at least the exit side plate thickness.
The longitudinal distribution of the deformation resistance of the material to be rolled, which is the above-mentioned temperature-corresponding amount, is predicted on the basis of the longitudinal distributions of the inlet-side sheet thickness and the outlet-side sheet thickness, and the rolling resistance included in the predicted longitudinal resistance distribution of the deformation resistance. 2. The hot work according to claim 1, wherein a gap correction amount is calculated based on the deformation resistance of the material front end portion and the deformation resistance of the steady portion, and the average setup value for the pass rolling is corrected based on the gap correction amount. How to set up a rolling mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32484299A JP3838831B2 (en) | 1999-11-16 | 1999-11-16 | Hot rolling mill setup method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32484299A JP3838831B2 (en) | 1999-11-16 | 1999-11-16 | Hot rolling mill setup method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001137918A true JP2001137918A (en) | 2001-05-22 |
| JP3838831B2 JP3838831B2 (en) | 2006-10-25 |
Family
ID=18170289
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32484299A Expired - Lifetime JP3838831B2 (en) | 1999-11-16 | 1999-11-16 | Hot rolling mill setup method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method for hot rolled strip steel roll gap model |
| CN107433288A (en) * | 2016-05-25 | 2017-12-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506404A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Method for controlling roll gap during finish rolling of strip steel |
-
1999
- 1999-11-16 JP JP32484299A patent/JP3838831B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method for hot rolled strip steel roll gap model |
| CN107433288A (en) * | 2016-05-25 | 2017-12-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
| CN107433288B (en) * | 2016-05-25 | 2019-02-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
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|---|---|
| JP3838831B2 (en) | 2006-10-25 |
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