JP2002028709A - Method for controlling width of steel sheet - Google Patents
Method for controlling width of steel sheetInfo
- Publication number
- JP2002028709A JP2002028709A JP2000185623A JP2000185623A JP2002028709A JP 2002028709 A JP2002028709 A JP 2002028709A JP 2000185623 A JP2000185623 A JP 2000185623A JP 2000185623 A JP2000185623 A JP 2000185623A JP 2002028709 A JP2002028709 A JP 2002028709A
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- JP
- Japan
- Prior art keywords
- temperature
- width
- rough
- rolled material
- rolling
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粗圧延材を加熱装
置にて昇温してから仕上圧延する熱延鋼板の圧延設備に
おいて鋼板を圧延する際の板幅制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a width of a steel sheet in a hot-rolled steel sheet rolling equipment in which a rough-rolled material is heated by a heating device and then finish-rolled.
【０００２】[0002]
【従来の技術】従来、熱延鋼板の圧延設備において、粗
圧延機で圧延された鋼板の板幅を目標値に制御する板幅
制御方法として、特開平１０−１６６０１８号公報に開
示された方法や、特開平９−１５５４２２号公報に開示
された方法が知られている。2. Description of the Related Art Conventionally, a method disclosed in Japanese Patent Application Laid-Open No. H10-166018 has been proposed as a sheet width control method for controlling a sheet width of a steel sheet rolled by a rough rolling mill to a target value in a hot-rolled steel sheet rolling equipment. Also, a method disclosed in Japanese Patent Application Laid-Open No. 9-155422 is known.
【０００３】前記特開平１０−１６６０１８号公報に開
示された方法では、仕上圧延機入側の竪型圧延機のロー
ル開度を操作することによって板幅を制御する。前記特
開平９−１５５４２２号公報に開示された方法では、仕
上圧延機のスタンド間張力を操作することによって板幅
を制御する。これらの方法には、粗圧延材の板幅を測定
しておき、仕上圧延機出側で目標幅に一致するように張
力や竪型圧延機のロール開度を操作するフィードフォワ
ード制御方式と、仕上圧延機出側で板幅を測定して目標
幅からの偏差を修正するように張力や竪型圧延機のロー
ル開度を操作するフィードバック制御方式がある。In the method disclosed in Japanese Patent Application Laid-Open No. 10-166018, the sheet width is controlled by manipulating the roll opening of a vertical rolling mill on the side of the finishing mill. According to the method disclosed in Japanese Patent Application Laid-Open No. 9-155422, the width of a sheet is controlled by controlling the tension between stands of a finishing mill. These methods include a feedforward control method in which the sheet width of the rough-rolled material is measured, and the tension and the roll opening of the vertical mill are controlled so as to match the target width on the exit side of the finishing mill, There is a feedback control method in which the sheet width is measured on the exit side of the finishing mill and the tension and the roll opening of the vertical mill are operated so as to correct the deviation from the target width.
【０００４】一方、粗圧延機と仕上圧延機の間に通電加
熱装置や誘導加熱装置などの加熱装置を設け、粗圧延さ
れた粗圧延材を昇温してから仕上圧延する技術が開発さ
れている。この技術を用いると、仕上圧延機の負荷が軽
減されて製造可能範囲拡大することができるという効果
や、鋼板の圧延方向の温度変動に起因する板厚変動が抑
制されるという効果がある。On the other hand, a technique has been developed in which a heating device such as an electric heating device or an induction heating device is provided between a rough rolling mill and a finishing rolling mill to raise the temperature of the rough-rolled material and then finish-roll the material. I have. The use of this technique has an effect that the load on the finishing mill can be reduced and the manufacturable range can be expanded, and a change in sheet thickness caused by a temperature change in the rolling direction of the steel sheet is suppressed.
【０００５】[0005]
【発明が解決しようとする課題】加熱装置のない場合を
前提とした従来の板幅制御方法をそのまま加熱装置のあ
る圧延設備に適用すると、板幅制御精度が悪化する場合
がある。If a conventional strip width control method premised on a case without a heating device is applied to a rolling facility having a heating device as it is, the strip width control accuracy may be degraded.
【０００６】これは、加熱装置による粗圧延材の温度上
昇とそれに伴う変形抵抗の減少が板幅制御に与える影響
を考慮していないためである。板幅制御精度を悪化させ
ないためには、(1) 加熱による熱膨張作用によって板幅
が広がること、(2) 仕上スタンド間での鋼板の変形抵抗
が減少し、仕上スタンド間の幅減少量が増大すること、
(3) 竪型圧延機によって板幅を制御する場合は、幅制御
効果が増大すること、(4) 張力を操作することにより板
幅を制御する場合は、幅制御効果が増大すること、を考
慮して板幅制御する必要がある。特に(3) 、(4) の板幅
制御効果に関しては、圧延によって３次元的に変形しや
すい幅端部の温度が大きな影響を与える。[0006] This is because the effect of the temperature rise of the rough rolled material by the heating device and the accompanying decrease in deformation resistance on the control of the sheet width is not taken into account. In order not to degrade the accuracy of plate width control, (1) the plate width is expanded by the thermal expansion effect of heating, (2) the deformation resistance of the steel plate between the finishing stands is reduced, and the amount of width reduction between the finishing stands is reduced. Increasing,
(3) The width control effect increases when the strip width is controlled by a vertical rolling mill, and (4) The width control effect increases when the strip width is controlled by controlling the tension. It is necessary to control the board width taking into account. In particular, regarding the sheet width control effects of (3) and (4), the temperature at the width end, which is easily deformed three-dimensionally by rolling, has a great influence.
【０００７】本発明の課題は、粗圧延機と仕上圧延機の
間に加熱装置を備えた熱延鋼板の圧延設備において、制
御精度の高い鋼板の板幅制御方法を提供することにあ
る。An object of the present invention is to provide a method for controlling the width of a steel sheet with high control accuracy in a hot-rolled steel sheet rolling equipment provided with a heating device between a rough rolling mill and a finishing rolling mill.
【０００８】[0008]
【課題を解決するための手段】本発明者は各種のシミュ
レーションおよび実験により、下記の知見を得た。The present inventors have obtained the following findings through various simulations and experiments.
【０００９】(a) 従来技術では、仕上圧延機前の温度計
で鋼板温度を測定し、これに基づいて竪型圧延機の幅圧
下または仕上スタンド間の張力変更によって板幅制御を
行っている。板幅制御に必要なパラメータである変形抵
抗は鋼板の平均温度に基づいて計算するが、この平均温
度は仕上圧延機前の表面温度測定値から厚さ方向および
幅方向の特定の温度分布パターンを前提として推定して
いる。この温度分布パターンは、加熱装置のない場合の
粗圧延機〜仕上圧延機の間の放熱・冷却を前提としたも
のである。(A) In the prior art, the temperature of a steel sheet is measured by a thermometer in front of a finish rolling mill, and based on the measured temperature, the strip width is controlled by reducing the width of a vertical rolling mill or changing the tension between finishing stands. . Deformation resistance, a parameter required for strip width control, is calculated based on the average temperature of the steel sheet.This average temperature is calculated from the measured surface temperature before the finish rolling mill in a specific temperature distribution pattern in the thickness and width directions. It is estimated as a premise. This temperature distribution pattern is based on the premise that heat is radiated and cooled between the rough rolling mill and the finishing rolling mill without a heating device.
【００１０】(b) 粗圧延材の加熱装置を設置する場合、
通常誘導加熱方式が用いられる。粗圧延材を誘導加熱す
ると、表面ほど温度上昇が大きい。すなわち、粗圧延材
の厚さ方向および幅方向の温度分布パターンは従来技術
が前提としていたものとは異なる。従って、粗圧延材の
表面温度を測定して、仕上圧延機入側の竪型圧延機によ
る幅圧下、または仕上圧延機スタンド間張力変更による
幅制御に用いる材料温度の推定は、従来とは異なった手
法を用いる必要がある。(B) When installing a heating device for a rough rolled material,
Usually, an induction heating method is used. When the rough rolled material is induction-heated, the temperature rise is larger at the surface. That is, the temperature distribution patterns in the thickness direction and the width direction of the rough rolled material are different from those assumed in the prior art. Therefore, measuring the surface temperature of the rough rolled material and estimating the material temperature used for width control by the vertical rolling mill on the entry side of the finishing mill or width control by changing the tension between the finishing mill stands is different from the conventional method. It is necessary to use a technique that has been adopted.
【００１１】表面温度測定値から粗圧延材の平均温度ま
たは温度分布を求める場合の測定位置は、加熱装置の入
側、出側いずれでもよい。加熱装置入側で測定する場
合、加熱装置での昇温過程を想定して温度分布等を推定
する。加熱装置出側で測定する場合は加熱後の表面温度
を測定することになるが、やはり加熱装置での昇温過程
を推定して温度分布等を推定する。The measurement position for obtaining the average temperature or temperature distribution of the rough rolled material from the measured surface temperature may be on either the entrance side or the exit side of the heating device. When the measurement is performed on the inlet side of the heating device, the temperature distribution and the like are estimated assuming a temperature rising process in the heating device. When the measurement is performed on the outlet side of the heating device, the surface temperature after heating is measured, but the temperature distribution and the like are also estimated by estimating the temperature rising process in the heating device.
【００１２】上記の知見に基づいて完成した本発明の要
旨は以下の通りである。The gist of the present invention completed on the basis of the above findings is as follows.
【００１３】(1) 粗圧延機にて圧延された粗圧延材を加
熱装置にて昇温した後に竪型圧延機で幅方向に圧下し、
ついで仕上圧延機にて連続仕上圧延をする圧延設備を用
い、竪型圧延機のロール開度を変更することによって板
幅を制御する鋼板の板幅制御方法であって、加熱装置出
側の粗圧延材の温度測定値に基づいて推定した竪型圧延
機で幅圧下されるときの粗圧延材温度の推定値、または
加熱装置入側の粗圧延材の温度測定値をもとに加熱装置
による昇温を考慮して推定した竪型圧延機で幅圧下され
るときの粗圧延材温度の推定値に基づいて、竪型圧延機
のロール開度を決定することを特徴とする鋼板の板幅制
御方法。(1) The temperature of a rough rolled material rolled by a rough rolling mill is raised by a heating device, and then reduced in the width direction by a vertical rolling mill.
Next, a method for controlling the width of a steel sheet by controlling the width of a steel sheet by changing the roll opening of a vertical mill using a rolling equipment that performs continuous finish rolling with a finishing mill, comprising: Estimated value of rough rolled material temperature when width reduced by vertical rolling mill estimated based on temperature measured value of rolled material, or by heating device based on temperature measured value of rough rolled material on the inlet side of heating device The roll width of the vertical rolling mill is determined based on the estimated value of the rough rolling material temperature when the width is reduced by the vertical rolling mill estimated in consideration of the temperature rise, characterized in that the width of the steel plate is determined. Control method.
【００１４】(2) 竪型圧延機で幅圧下されるときの粗圧
延材温度の推定値が、幅方向の温度分布を含む推定値で
あることを特徴とする請求項１に記載の鋼板の板幅制御
方法。(2) The estimated value of the rough-rolled material temperature when the width is reduced by the vertical rolling mill is an estimated value including a temperature distribution in the width direction. Sheet width control method.
【００１５】(3) 粗圧延機にて圧延された粗圧延材を加
熱装置にて昇温した後に仕上圧延機にて連続仕上圧延を
する圧延設備を用い、仕上圧延機のスタンド間張力を変
更して板幅制御を行う鋼板の板幅制御方法であって、加
熱装置出側の粗圧延材の温度測定値に基づいて推定した
仕上圧延機のスタンド間の鋼板温度の推定値、または加
熱装置入側の粗圧延材の温度測定値をもとに加熱装置に
よる昇温を考慮して推定した仕上圧延機のスタンド間の
鋼板温度の推定値に基づいて、スタンド間張力を変更し
て板幅制御を行うことを特徴とする鋼板の板幅制御方
法。(3) The tension between the stands of the finishing mill is changed by using a rolling equipment which raises the temperature of the rough rolled material rolled by the rough rolling mill by a heating device and then performs continuous finish rolling by a finishing mill. A method of controlling the width of a steel sheet, which performs a width control of the steel sheet, the estimated value of the temperature of the steel sheet between the stands of the finishing mill estimated based on the temperature measurement value of the rough rolled material on the exit side of the heating device, or the heating device Based on the estimated value of the temperature of the steel plate between the stands of the finishing mill estimated based on the temperature measurement value of the incoming rough rolled material and considering the temperature rise by the heating device, the tension between the stands was changed by changing the tension between the stands. A method for controlling the width of a steel sheet, comprising performing control.
【００１６】(4) スタンド間の鋼板温度の推定値が、幅
方向の温度分布を含む推定値であることを特徴とする請
求項３に記載の鋼板の板幅制御方法。(4) The method according to claim 3, wherein the estimated value of the temperature of the steel sheet between the stands is an estimated value including a temperature distribution in the width direction.
【００１７】[0017]
【発明の実施の形態】図１は、仕上圧延機入側に竪型圧
延機を有する圧延設備における、本発明の鋼板の板幅制
御方法の構成例を示す概要図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing an example of the configuration of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of a finishing mill.
【００１８】粗圧延機１０で粗圧延された粗圧延材は、
加熱装置２０で昇温された後に、竪型圧延機３０にて幅
方向に圧下され、引き続いて仕上圧延機３１〜３７にて
圧延される。これらの圧延設備の圧延速度や鋼板の搬送
速度は、圧延ライン速度設定装置７０によって制御され
ており、その速度情報は温度推定装置６０、板幅制御装
置８０に逐次与えられる。粗圧延機１０と加熱装置２０
の間には粗圧延材の温度を測定する温度計４０が設置さ
れており、測定された粗圧延材温度は温度推定装置６０
と板幅制御装置８０と温度制御装置１００に与えられ
る。また、粗圧延機１０と加熱装置２０の間には粗圧延
後の板幅を測定する板幅計５０が設置されており、測定
された板幅は板幅制御装置８０に与えられる。温度制御
装置１００は、温度計４０から与えられた粗圧延材温度
測定値をもとに必要な粗圧延材昇温量を求め、加熱装置
２０を操作することによって粗圧延材を昇温するととも
に、求められた粗圧延材昇温量を温度推定装置６０に与
えるように構成されている。温度推定装置６０では、温
度計４０から与えられた粗圧延材温度測定値と温度制御
装置１００から与えられた粗圧延材昇温量と圧延ライン
速度設定装置７０から与えられた圧延速度および搬送速
度とから、竪型圧延機３０、仕上圧延機３１〜３７で圧
延される際の圧延材温度を推定する。The rough-rolled material roughly rolled by the rough rolling mill 10 is
After the temperature is raised by the heating device 20, it is reduced in the width direction by the vertical rolling mill 30, and subsequently rolled by the finishing mills 31 to 37. The rolling speed of these rolling equipment and the conveying speed of the steel sheet are controlled by a rolling line speed setting device 70, and the speed information is sequentially given to a temperature estimating device 60 and a sheet width control device 80. Rough rolling mill 10 and heating device 20
A thermometer 40 for measuring the temperature of the rough-rolled material is installed between them, and the measured rough-rolled material temperature is measured by a temperature estimating device 60.
And the sheet width control device 80 and the temperature control device 100. A width gauge 50 for measuring the width of the sheet after the rough rolling is installed between the rough rolling machine 10 and the heating device 20, and the measured sheet width is given to the sheet width control device 80. The temperature control device 100 obtains a necessary rough-rolled material temperature increase amount based on the measured value of the rough-rolled material temperature given from the thermometer 40, and raises the temperature of the rough-rolled material by operating the heating device 20. The obtained rough-rolled material temperature increase amount is provided to the temperature estimating device 60. In the temperature estimating device 60, the measured value of the rough-rolled material temperature given from the thermometer 40, the amount of temperature rise of the rough-rolled material given from the temperature control device 100, and the rolling speed and conveying speed given from the rolling line speed setting device 70. From this, the rolled material temperature at the time of rolling by the vertical rolling mill 30 and the finishing rolling mills 31 to 37 is estimated.
【００１９】板幅制御装置８０は、板幅計５０から与え
られた板幅測定値と温度計４０から与えられた粗圧延材
温度と温度推定装置６０から与えられた圧延材の温度推
定値とをもとに加熱装置２０による圧延材の熱膨張を計
算して竪型圧延機３０の入側板幅を予測する。The sheet width control device 80 calculates the sheet width measurement value given from the sheet width gauge 50, the rough rolled material temperature given from the thermometer 40, the rolled material temperature given value given from the temperature estimating device 60, and Calculate the thermal expansion of the rolled material by the heating device 20 on the basis of the above, and predict the entry-side plate width of the vertical rolling mill 30.
【００２０】さらに、板幅制御装置８０は、温度推定装
置６０から与えられた圧延材の温度推定値と圧延ライン
速度設定装置７０から与えられる圧延速度情報とをもと
に、竪型圧延機３０の板幅制御効果、仕上圧延機３１〜
３７での板幅変化を考慮して、仕上圧延後の板幅が目標
値になるような竪型圧延機３０のロール開度を求め、竪
型圧延機３０のロール開度を変更しながら圧延すること
によって圧延材の板幅が制御されるように構成されてい
る。Further, the sheet width control device 80 controls the vertical rolling mill 30 based on the estimated temperature of the rolled material given from the temperature estimating device 60 and the rolling speed information given from the rolling line speed setting device 70. Width control effect, finishing mills 31-
In consideration of the change in the width of the plate at 37, the roll opening of the vertical mill 30 is determined so that the plate width after finish rolling becomes the target value, and the roll is changed while changing the roll opening of the vertical mill 30. By doing so, the sheet width of the rolled material is controlled.
【００２１】以上の圧延設備における本発明の板幅制御
方法の制御動作を説明する。粗圧延機に圧延された粗圧
延材が温度計４０を通過する際に、粗圧延材の圧延方向
の温度分布ＴR(x)が測定され、温度推定装置６０と板幅
制御装置８０と温度制御装置１００に与えられる。また
粗圧延材が板幅計５０を通過する際には、粗圧延材の圧
延方向の板幅分布ＷR(x)が測定され板幅制御装置８０に
与えられる。The control operation of the strip width control method of the present invention in the above-mentioned rolling equipment will be described. When the rough rolled material rolled by the rough rolling mill passes through the thermometer 40, the temperature distribution T R (x) in the rolling direction of the rough rolled material is measured, and the temperature estimating device 60, the sheet width control device 80, the temperature It is provided to the control device 100. When the rough rolled material passes through the width gauge 50, the width distribution W R (x) of the rough rolled material in the rolling direction is measured and provided to the width control device 80.
【００２２】温度制御装置１００は粗圧延材温度ＴR(x)
と目標温度ＴAIM(x) と加熱装置の仕様から決まる最大
昇温量ＴMAX より必要昇温量を、 ΔＴUP(x)＝ min{ＴAIM(x)−ＴR(x),ＴMAX } (1) として計算し、温度推定装置６０に与えるとともに、加
熱装置２０を操作して粗圧延材温度を制御する。The temperature control device 100 calculates the rough rolled material temperature T R (x)
From the maximum temperature increase amount T MAX determined from the target temperature T AIM (x) and the specification of the heating device, the required temperature increase amount is: ΔT UP (x) = min {T AIM (x) −T R (x), T MAX } (1) is supplied to the temperature estimating device 60, and the heating device 20 is operated to control the temperature of the rough rolled material.
【００２３】温度推定装置６０は、まず、圧延ライン速
度設定装置７０から与えられた搬送速度から、加熱装置
２０から竪型圧延機３０までの圧延材の搬送時間を計算
し、これをもとに加熱装置２０から竪型圧延機３０まで
の圧延材の温度変化ΔＴBE(x)を求め、竪型圧延機３０
を通過する際の圧延材の温度を、 ＴE(x)＝ＴR(x)＋ΔＴUP (x)＋ΔＴBE(x) (2) として求め、板幅制御装置８０に与える。The temperature estimating device 60 first calculates the transport time of the rolled material from the heating device 20 to the vertical mill 30 from the transport speed given from the rolling line speed setting device 70, and based on this, The temperature change ΔT BE (x) of the rolled material from the heating device 20 to the vertical rolling mill 30 is determined, and the vertical rolling mill 30
Is obtained as T E (x) = T R (x) + ΔT UP (x) + ΔT BE (x) (2) and given to the sheet width control device 80.
【００２４】次いで、温度推定装置６０は、圧延ライン
速度設定装置７０から与えられた圧延速度から、仕上圧
延機３１〜３７の各スタンド間の温度降下と圧延による
加工発熱を考慮して、仕上圧延機３１〜３７の各スタン
ド間を通過する際の圧延材の温度Ｔi(x)（i=1〜6）を計
算し、板幅制御装置８０に与える。Next, the temperature estimating device 60 takes the rolling speed given from the rolling line speed setting device 70 into consideration for the temperature drop between the stands of the finishing mills 31 to 37 and the heat generated by the rolling process. The temperature T i (x) (i = 1 to 6) of the rolled material when passing between the stands of the mills 31 to 37 is calculated and given to the sheet width control device 80.
【００２５】板幅制御装置８０は、まず、板幅測定値Ｗ
R(x)と粗圧延材温度測定値ＴR(x)と竪型圧延機での圧延
材の温度ＴE(x)から、圧延材の熱膨張を考慮し、竪型圧
延機３０の入側板幅を、 ＷE(x)＝(1＋α)×{ＴE(x)−ＴR(x)}×ＷR(x) (3) で求める。ここでαは圧延材の線膨張係数である。The sheet width control device 80 first sets the measured sheet width W
From R (x) and rough rolled material temperature measurement T R (x) and vertical temperature T E of the strip in the rolling mill (x), taking into account the thermal expansion of the rolled material, inlet of the vertical rolling mill 30 The side plate width is obtained by W E (x) = (1 + α) × {T E (x) −T R (x)} × W R (x) (3) Here, α is the linear expansion coefficient of the rolled material.
【００２６】次いで、板幅制御装置８０は、圧延ライン
速度設定装置７０から与えられる圧延速度情報をもと
に、仕上圧延機３１〜３７の各スタンド間を通過するの
に必要な時間ｔi（i=1〜6）を計算し、仕上圧延機３１
〜３７の各スタンド間での幅減少量を、 により求める。ここでＷAIM は仕上圧延後の目標板幅で
あり、Ａ(Ti)、Ｂ(Ti)、Ｃ(Ti)、ｍ(Ti)、ｎ(Ti)は圧延
材の温度Ｔi の関数である。Next, based on the rolling speed information provided from the rolling line speed setting device 70, the sheet width control device 80 controls the time t i ( i ) required to pass between the stands of the finishing mills 31 to 37. i = 1 to 6) and finish rolling mill 31
The width reduction between each stand of ~ 37 Ask by Here, W AIM is the target strip width after finish rolling, and A (T i ), B (T i ), C (T i ), m (T i ), and n (T i ) are the temperature T of the rolled material. It is a function of i .
【００２７】板幅制御装置８０は、(5) 、(6) 式によ
り、竪型圧延機３０の幅方向圧下によって板幅がＷE(x)
からΔＷE(x)減少し、その後、仕上圧延のスタンド間張
力によってΔＷi(x)だけ板幅が減少した後の板幅（仕上
圧延後）を算出し、これが目標幅ＷAIM になるように竪
型圧延機を制御する。すなわち、 ＷE(x)−ΔＷE(x)−ΣΔＷi(x)＝ＷAIM (5) ΔＷE(x)＝η(x)・{ＷE(x)−S(x)} (6) を満足するようなロール開度Ｓ(x) を求め、竪型圧延機
３０のロール開度を操作しながら圧延することにより仕
上圧延後の板幅が目標値ＷAIM に制御する。ここでη
(x) は温度ＴE の関数であり、幅調整効率と呼ばれる量
である。The sheet width control device 80 calculates the sheet width W E (x) by the reduction in the width direction of the vertical rolling mill 30 according to the equations (5) and (6).
Is reduced by ΔW E (x), and thereafter, the sheet width (after finish rolling) after the sheet width is reduced by ΔW i (x) by the tension between stands in finish rolling is calculated, and this is set to the target width W AIM. To control the vertical mill. That, W E (x) -ΔW E (x) -ΣΔW i (x) = W AIM (5) ΔW E (x) = η (x) · {W E (x) -S (x)} (6 ) Is obtained, and rolling is performed while operating the roll opening of the vertical mill 30 so that the sheet width after finish rolling is controlled to the target value WAIM . Where η
(x) is a function of the temperature T E, a quantity called width adjustment efficiency.
【００２８】上記の説明中、温度計４０にて測定するの
は圧延材の幅方向中央部の温度であるのが一般的である
が、竪型圧延機３０による板幅減少量ΔＷE(x)、および
仕上圧延による幅減少量ΔＷi(x)は幅方向端部の温度の
影響が大きいので、ＴE(x)、Ｔi(x)の幅方向分布を考慮
することで制御精度が向上する。[0028] In the above description, the measure at thermometer 40 is the temperature of the central portion in the width direction of the rolled material is generally vertical rolling mill 30 according to the sheet width reduction amount [Delta] W E (x ), And the width reduction amount ΔW i (x) due to finish rolling is greatly affected by the temperature at the end in the width direction. Therefore, the control accuracy can be improved by considering the width direction distribution of T E (x) and T i (x). improves.
【００２９】図２は、仕上圧延機入側に竪型圧延機を有
する圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図１とは板幅計５０の位置
が竪型圧延機３０の入側になっている点が異なってい
る。図２の構成では竪型圧延機入側幅ＷE(x)を直接測定
できるため、加熱装置２０によって昇温することによる
熱膨張幅変化を板幅制御装置８０で予測する必要がな
い。その他の制御動作は図１の構成の場合と同じであ
る。FIG. 2 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of the finishing mill. The difference from FIG. 1 is that the position of the width gauge 50 is on the entry side of the vertical rolling mill 30. In the configuration of FIG. 2, the width W E (x) on the vertical rolling mill entrance side can be directly measured, so that it is not necessary for the sheet width control device 80 to predict a change in the thermal expansion width caused by heating by the heating device 20. Other control operations are the same as those in the configuration of FIG.
【００３０】図３は、仕上圧延機入側に竪型圧延機を有
する圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図１および２とは温度計４
０の位置が竪型圧延機３０の入側になっている点が異な
っている。FIG. 3 is a schematic view showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of the finishing mill. 1 and 2 show a thermometer 4
The difference is that the position of 0 is on the entry side of the vertical rolling mill 30.
【００３１】図３の構成では竪型圧延機４０で幅圧下さ
れる際の圧延材の温度ＴE(x)を直接測定するため、加熱
装置２０によって昇温することを温度推定装置６０で考
慮する必要がない。In the configuration of FIG. 3, the temperature estimating device 60 considers the temperature rise by the heating device 20 in order to directly measure the temperature T E (x) of the rolled material when the width is reduced by the vertical rolling mill 40. No need to do.
【００３２】温度制御装置１００は温度計の測定温度に
基づいて昇温量を決定するのではなく、予め定められた
昇温量ΔＴUP' だけ加熱装置２０に与えて粗圧延材を加
熱し、昇温量ΔＴUP' は板幅制御装置８０に与える。板
幅制御装置８０では、圧延材の熱膨張を考慮した竪型圧
延機３０の入側板幅を、 にて計算する。その他の制御動作は図１の構成の場合と
同じである。The temperature control device 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer, but gives the predetermined amount of temperature increase ΔT UP ′ to the heating device 20 to heat the rough rolled material. The temperature increase amount ΔT UP ′ is given to the plate width control device 80. In the sheet width control device 80, the entry side sheet width of the vertical rolling mill 30 in consideration of the thermal expansion of the rolled material is Is calculated. Other control operations are the same as those in the configuration of FIG.
【００３３】図４は、仕上圧延機入側に竪型圧延機を有
する圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図１および図３とは板幅計
５０が竪型圧延機３０の入側に配置されている点が異な
っており、図１および図２とは温度計４０が竪型圧延機
３０の入側に配置されている点が異なっている。FIG. 4 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of the finishing mill. 1 and FIG. 3 in that a width gauge 50 is arranged on the entrance side of the vertical mill 30. In FIG. 1 and FIG. In that they are located in
【００３４】図４の構成において、竪型圧延機入側幅Ｗ
E(x)を直接測定するため、加熱装置２０によって昇温す
ることによる熱膨張幅変化を板幅制御装置８０で予測す
る必要がない。また、竪型圧延機４０で幅圧下される際
の圧延材の温度ＴE(x)を直接測定するため、加熱装置２
０によって昇温することを温度推定装置６０で予測する
必要がない。In the configuration shown in FIG.
Since E (x) is directly measured, it is not necessary for the plate width control device 80 to predict a change in the thermal expansion width caused by the temperature rise by the heating device 20. Further, in order to directly measure the temperature T E (x) of the rolled material when the width is reduced by the vertical rolling mill 40, the heating device 2 is used.
It is not necessary for the temperature estimating device 60 to predict that the temperature will rise due to zero.
【００３５】温度制御装置１００は温度計の測定温度に
基づいて昇温量を決定するのではなく、予め定められた
昇温量だけ加熱装置２０に与えて粗圧延材を加熱する。
その他の制御動作は図１の構成の場合と同じである。The temperature controller 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer, but gives the predetermined amount of temperature increase to the heating device 20 to heat the rough rolled material.
Other control operations are the same as those in the configuration of FIG.
【００３６】図５は、仕上圧延機入側に竪型圧延機を有
する圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図１〜４とは板幅計５０の
位置が仕上圧延機３７の出側になっている点が異なる。FIG. 5 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of the finishing mill. 1 to 4 is that the position of the width gauge 50 is on the exit side of the finishing mill 37.
【００３７】図５の構成において、板幅制御装置８０
は、板幅計５０で測定された仕上圧延後の板幅ＷF(x)と
目標幅ＷAIM の差に基き、竪型圧延機３０のロール開度
を、 ΔＳ＝−{１／η(x)} ・{ＷF(x)−ＷAIM} (8) だけ変更することにより板幅を制御する。この制御に
は、周知の比例積分制御を用いてもよい。幅調整効率η
を求める手順は図１の構成の場合と同じである。In the configuration shown in FIG.
Is based on the difference between the target width W AIM and the width W F (x) after finish rolling measured by the width meter 50, the roll opening degree of the vertical mill 30 is ΔS = − {1 / η ( x)} ・ {W F (x) −W AIM } The plate width is controlled by changing only (8). A well-known proportional-integral control may be used for this control. Width adjustment efficiency η
Is the same as that of the configuration of FIG.
【００３８】図６は、仕上圧延機入側に竪型圧延機を有
する圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図５とは温度計４０の位置
が竪型圧延機３０の入側になっている点が異なってい
る。FIG. 6 is a schematic view showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of the finishing mill. The difference from FIG. 5 is that the position of the thermometer 40 is on the entry side of the vertical rolling mill 30.
【００３９】図６の構成では、竪型圧延機３０で幅圧下
される際の圧延材の温度ＴE(x)を直接測定して板幅制御
装置８０に与える。板幅制御装置８０は測定された温度
ＴE(x)に基づき幅調整効率η(x) を求める。In the configuration shown in FIG. 6, the temperature T E (x) of the rolled material when the width is reduced by the vertical rolling mill 30 is directly measured and given to the sheet width control device 80. The board width control device 80 determines the width adjustment efficiency η (x) based on the measured temperature T E (x).
【００４０】温度制御装置１００は温度計４０の測定温
度に基づいて昇温量を決定するのではなく、予め定めら
れた昇温量だけ加熱装置２０に与えて粗圧延材を加熱す
る。その他の制御動作は図５の構成の場合と同じであ
る。The temperature control device 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer 40, but applies the predetermined amount of temperature increase to the heating device 20 to heat the rough rolled material. Other control operations are the same as those in the configuration of FIG.
【００４１】図７は、仕上圧延機入側に竪型圧延機がな
い圧延設備における、本発明の鋼板の板幅制御方法の構
成例を示す概要図である。粗圧延機１０で粗圧延された
粗圧延材は、加熱装置２０で昇温された後に、仕上圧延
機３１〜３７にて圧延される。これらの圧延設備の圧延
速度や鋼板の搬送速度は、圧延ライン速度設定装置７０
によって制御されており、その速度情報は温度推定装置
６０、板幅制御装置８０に逐次与えられる。FIG. 7 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill. The rough rolled material roughly rolled by the rough rolling mill 10 is heated by the heating device 20 and then rolled by the finish rolling mills 31 to 37. The rolling speed of these rolling equipment and the conveying speed of the steel sheet are controlled by a rolling line speed setting device 70.
The speed information is sequentially provided to the temperature estimating device 60 and the plate width control device 80.
【００４２】図７の構成において、粗圧延機１０と加熱
装置２０の間には粗圧延材の温度を測定する温度計４０
が設置されており、測定された粗圧延材温度は温度推定
装置６０と板幅制御装置８０と温度制御装置１００に与
えられる。また、粗圧延機１０と加熱装置２０の間には
粗圧延後の板幅を測定する板幅計５０が設置されてお
り、測定された板幅は板幅制御装置８０に与えられる。In the configuration shown in FIG. 7, a thermometer 40 for measuring the temperature of the rough rolled material is provided between the rough rolling mill 10 and the heating device 20.
Is provided, and the measured rough-rolled material temperature is given to the temperature estimating device 60, the sheet width control device 80, and the temperature control device 100. A width gauge 50 for measuring the width of the plate after the rough rolling is installed between the rough rolling mill 10 and the heating device 20, and the measured width of the plate is given to the width controller 80.
【００４３】温度制御装置１００は、温度計４０から与
えられた粗圧延材温度の測定値をもとに必要な粗圧延材
昇温量を求め、加熱装置２０を操作することによって粗
圧延材を昇温するとともに、求められた粗圧延材昇温量
を温度推定装置６０に与えるように構成されている。The temperature control device 100 obtains the necessary amount of temperature rise of the rough rolled material based on the measured value of the rough rolled material temperature given from the thermometer 40, and operates the heating device 20 to control the rough rolled material. The temperature is raised, and the obtained rough-rolled material temperature rising amount is provided to the temperature estimating device 60.
【００４４】温度推定装置６０では、温度計４０から与
えられた粗圧延材温度測定値と温度制御装置１００から
与えられた粗圧延材昇温量と圧延ライン速度設定装置７
０から与えられた圧延速度と搬送速度から、仕上圧延機
３１〜３７で圧延される際の圧延材温度を推定する。In the temperature estimating device 60, the rough rolled material temperature measured value given from the thermometer 40, the rough rolled material temperature increase given from the temperature control device 100, and the rolling line speed setting device 7
From the rolling speed and the conveying speed given from 0, the rolled material temperature at the time of rolling by the finishing mills 31 to 37 is estimated.
【００４５】板幅制御装置８０は、板幅計５０から与え
られた板幅測定値と温度計４０から与えられた粗圧延材
温度と温度推定装置６０から与えられた圧延材の温度推
定値をもとに、加熱装置２０による圧延材の熱膨張を計
算して仕上圧延機３１の入側板幅を予測する。さらに、
板幅制御装置８０は、温度推定装置６０から与えられた
圧延材の温度推定値と圧延ライン速度設定装置７０から
与えられる圧延速度情報をもとに、仕上圧延機３１〜３
７での板幅変化を考慮して、仕上圧延後の板幅が目標値
になるような仕上圧延機３１〜３７のスタンド間張力を
求め、張力制御装置９０に与える。The sheet width controller 80 calculates the sheet width measurement value given from the sheet width gauge 50, the rough rolled material temperature given from the thermometer 40, and the rolled material temperature estimate given from the temperature estimating device 60. Based on this, the thermal expansion of the rolled material by the heating device 20 is calculated to predict the width of the entry side plate of the finishing mill 31. further,
The sheet width control device 80 is based on the temperature estimation value of the rolled material given from the temperature estimating device 60 and the rolling speed information given from the rolling line speed setting device 70, and finishes the rolling mills 31-3.
The tension between the stands of the finishing mills 31 to 37 is determined such that the sheet width after finish rolling becomes the target value in consideration of the change in the sheet width at 7 and is given to the tension control device 90.
【００４６】張力制御装置９０は、与えられた張力にな
るように仕上圧延機３１〜３７のロール回転数を変更し
ながら圧延することによって圧延材の板幅が制御される
ように構成されている。The tension control device 90 is configured to control the width of the rolled material by performing rolling while changing the number of roll rotations of the finishing mills 31 to 37 so as to obtain a given tension. .
【００４７】図７の構成の圧延設備における本発明の板
幅制御方法の制御動作を説明する。粗圧延機にて圧延さ
れた粗圧延材が温度計４０を通過する際に、粗圧延材の
圧延方向の温度分布ＴR(x)が測定され、温度推定装置６
０と板幅制御装置８０と温度制御装置１００に与えられ
る。また粗圧延材が板幅計５０を通過する際には、粗圧
延材の圧延方向の板幅分布ＷR(x)が測定され板幅制御装
置８０に与えられる。温度制御装置１００は粗圧延材温
度ＴR(x)と目標温度ＴAIM(x)と加熱装置の仕様から決ま
る最大昇温量ＴMAX より必要昇温量を、 ΔＴUP(x) ＝min{ＴAIM(x)−ＴR(x),ＴMAX} (9) として計算し、温度推定装置６０に与えるとともに、加
熱装置２０を操作して粗圧延材温度を制御する。The control operation of the strip width control method of the present invention in the rolling equipment having the configuration shown in FIG. 7 will be described. When the rough rolled material rolled by the rough rolling mill passes through the thermometer 40, the temperature distribution T R (x) in the rolling direction of the rough rolled material is measured, and the temperature estimating device 6
0, the sheet width control device 80 and the temperature control device 100. When the rough rolled material passes through the width gauge 50, the width distribution W R (x) of the rough rolled material in the rolling direction is measured and provided to the width control device 80. The temperature control device 100 calculates the required temperature increase amount from the rough rolled material temperature T R (x), the target temperature T AIM (x), and the maximum temperature increase amount T MAX determined by the specifications of the heating device, ΔT UP (x) = min { T AIM (x) −T R (x), T MAX } (9) is given to the temperature estimating device 60, and the heating device 20 is operated to control the rough rolled material temperature.
【００４８】温度推定装置６０は、圧延ライン速度設定
装置７０から与えられた搬送速度から加熱装置２０から
仕上圧延機３１までの圧延材の搬送時間を計算し、これ
をもとに加熱装置２０から仕上圧延機３１までの圧延材
の温度変化ΔＴB1(x) を求め、仕上圧延機３１に到達す
る際の圧延材の温度を、 ＴIN(x)＝ＴR(x)＋ΔＴUP(x)＋ΔＴB1(x) (10) として求め、板幅制御装置８０に与える。The temperature estimating device 60 calculates the transport time of the rolled material from the heating device 20 to the finishing mill 31 based on the transport speed given from the rolling line speed setting device 70, and based on the calculated time, the heating device 20 The temperature change ΔT B1 (x) of the rolled material up to the finish rolling mill 31 is determined, and the temperature of the rolled material when reaching the finish rolling mill 31 is expressed as T IN (x) = T R (x) + ΔT UP (x) + ΔT B1 (x) (10) is given to the plate width control device 80.
【００４９】さらに、温度推定装置６０は、圧延ライン
速度設定装置７０から与えられた圧延速度から、仕上圧
延機３１〜３７の各スタンド間の温度降下と圧延による
加工発熱を考慮して、仕上圧延機３１〜３７の各スタン
ド間を通過する際の圧延材の温度Ｔi(x)（i=1〜6）を計
算し、板幅制御装置８０に与える。Further, the temperature estimating device 60 takes the rolling speed given from the rolling line speed setting device 70 into consideration by taking into account the temperature drop between the stands of the finishing mills 31 to 37 and the heat generated by the rolling process. The temperature T i (x) (i = 1 to 6) of the rolled material when passing between the stands of the mills 31 to 37 is calculated and given to the sheet width control device 80.
【００５０】板幅制御装置８０は、板幅測定値ＷR(x)と
粗圧延材温度測定値ＴR(x)と仕上圧延機３１入側での圧
延材の温度ＴIN(x)から、圧延材の熱膨張を考慮し、仕
上圧延機３１の入側板幅を、 で求め、仕上圧延後の板幅が目標幅ＷAIM になるのに必
要な仕上圧延機３１〜３７での幅減少量を、 ΔＷref(x)＝ＷIN(x)−ＷAIM (12) として求める。ここでαは圧延材の線膨張係数である。The sheet width control device 80 calculates the sheet width measured value W R (x), the rough rolled material temperature measured value T R (x) and the rolled material temperature T IN (x) at the entrance of the finishing mill 31. , Taking into account the thermal expansion of the rolled material, In seeking the width reduction of the required finish rolling mill 31 to 37 to the plate width after finish rolling becomes the target width W AIM, ΔW ref (x) = W IN (x) -W AIM (12) Asking. Here, α is the linear expansion coefficient of the rolled material.
【００５１】さらに、板幅制御装置８０は圧延ライン速
度設定装置７０から与えられる圧延速度情報をもとに、
仕上圧延機３１〜３７の各スタンド間を通過するのに必
要な時間ｔi （i=1〜6）を計算し、仕上圧延機３１〜３
７の各スタンド間での幅減少量を例えば、 で求め、その総和ΣΔＷi(x)がΔＷref(x)に一致するよ
うな張力σi(x)を計算し、張力制御装置９０に与える。Further, based on the rolling speed information given from the rolling line speed setting device 70, the sheet width control device 80
The time t i (i = 1 to 6) required to pass between the stands of the finishing mills 31 to 37 is calculated, and the finishing mills 31 to 37 are calculated.
For example, the amount of width reduction between stands 7 And calculates a tension σ i (x) such that the sum ΣΔW i (x) matches ΔW ref (x), and supplies the calculated tension σ i (x) to the tension controller 90.
【００５２】張力制御装置９０は、張力がσi(x)に一致
するように、仕上圧延機３１〜３７のロール速度を操作
しながら圧延する。以上により仕上圧延後の板幅が目標
値Ｗ AIM に制御される。The tension control device 90 determines that the tension is σ.imatches (x)
To control the roll speed of finishing mills 31 to 37
While rolling. Based on the above, the target width after finish rolling
Value W AIM Is controlled.
【００５３】上記の説明中、温度計４０にて測定するの
は圧延材の幅方向中央部とするのが一般的であるが、仕
上圧延による幅減少量ΔＷi(x)は幅方向端部の温度の影
響が大きいので、Ｔi(x)の幅方向分布を考慮することで
制御精度が向上する。In the above description, the temperature measured by the thermometer 40 is generally at the center of the rolled material in the width direction. However, the width reduction ΔW i (x) due to finish rolling is determined at the width direction end. , The control accuracy is improved by considering the distribution of T i (x) in the width direction.
【００５４】図８は、仕上圧延機入側に竪型圧延機がな
い圧延設備における、本発明の鋼板の板幅制御方法の構
成例を示す概要図である。図７とは板幅計５０の位置が
仕上圧延機３１の入側になっている点が異なっている。FIG. 8 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill. 7 is different from FIG. 7 in that the position of the width gauge 50 is on the entry side of the finishing mill 31.
【００５５】図８の構成では、仕上圧延機３１の入側幅
ＷIN(x) を直接測定するため、加熱装置２０によって昇
温することによる熱膨張幅変化を板幅制御装置８０で予
測する必要がない。その他の制御動作は図７の構成の場
合と同じである。In the configuration shown in FIG. 8, since the entry width W IN (x) of the finishing mill 31 is directly measured, a change in the thermal expansion width caused by the temperature rise by the heating device 20 is predicted by the plate width control device 80. No need. Other control operations are the same as those in the configuration of FIG.
【００５６】図９は、仕上圧延機入側に竪型圧延機がな
い圧延設備における、本発明の鋼板の板幅制御方法の構
成例を示す概要図である。図７および８とは温度計４０
の位置が仕上圧延機３１の入側になっている点が異なっ
ている。FIG. 9 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill. 7 and 8 show a thermometer 40.
Is located on the entry side of the finishing mill 31.
【００５７】図９の構成では仕上圧延機３１の入側での
圧延材の温度ＴIN(x)を直接測定するため、加熱装置２
０によって昇温することを温度推定装置６０で考慮する
必要がない。また、温度制御装置１００は温度計の測定
温度に基づいて昇温量を決定するのではなく、予め定め
られた昇温量ΔＴUP' だけ加熱装置２０に与えて粗圧延
材を加熱する。この昇温量ΔＴUP' は板幅制御装置８０
にも与えられる。板幅制御装置８０では、圧延材の熱膨
張を考慮した仕上圧延機３１の入側板幅を、 にて計算する。その他の制御動作は図７の構成の場合と
同じである。In the configuration shown in FIG. 9, since the temperature T IN (x) of the rolled material on the entry side of the finishing mill 31 is directly measured, the heating device 2 is used.
It is not necessary for the temperature estimating device 60 to consider that the temperature is increased by 0. Further, the temperature control device 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer, but supplies the heating device 20 with a predetermined amount of temperature rise ΔT UP ′ to heat the rough rolled material. This temperature increase amount ΔT UP ′ is
Also given. In the sheet width control device 80, the entry side sheet width of the finishing mill 31 in consideration of the thermal expansion of the rolled material is Is calculated. Other control operations are the same as those in the configuration of FIG.
【００５８】図１０は、仕上圧延機入側に竪型圧延機が
ない圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図７および図９とは板幅計
５０が仕上圧延機３１の入側に配置されている点が異な
っており、図７および図８とは温度計４０が仕上圧延機
３１の入側に配置されている点が異なっている。FIG. 10 is a schematic view showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the side of the finishing mill. 7 and 9 are different in that a width gauge 50 is arranged on the entrance side of the finishing mill 31, and in FIGS. 7 and 8, a thermometer 40 is arranged on the entrance side of the finishing mill 31. Is different.
【００５９】図１０の構成において、仕上圧延機３１の
入側幅ＷIN(x) を直接測定するため、加熱装置２０によ
って昇温することによる熱膨張幅変化を板幅制御装置８
０で予測する必要がない。また、仕上圧延機３１の入側
での圧延材の温度ＴIN(x) を直接測定するため、加熱装
置２０によって昇温することを温度推定装置６０で予測
する必要がない。In the configuration shown in FIG. 10, in order to directly measure the inlet width W IN (x) of the finishing mill 31, the change in the thermal expansion width caused by the temperature rise by the heating device 20 is used as the width control device 8 for the plate width.
There is no need to predict at zero. Further, since the temperature T IN (x) of the rolled material at the entry side of the finishing mill 31 is directly measured, it is not necessary for the temperature estimating device 60 to predict that the temperature will be raised by the heating device 20.
【００６０】温度制御装置１００は温度計の測定温度に
基づいて昇温量を決定するのではなく、予め定められた
昇温量だけ加熱装置２０に与えて粗圧延材を加熱する。
その他の制御動作は図７の構成の場合と同じである。The temperature control device 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer, but applies the predetermined amount of temperature increase to the heating device 20 to heat the rough rolled material.
Other control operations are the same as those in the configuration of FIG.
【００６１】図１１は、仕上圧延機入側に竪型圧延機が
ない圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図７〜１０とは板幅計５０
の位置が仕上圧延機３７の出側に配置されている点が異
なる。FIG. 11 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the side of the finishing mill. 7 to 10 show the width meter 50.
Is arranged on the exit side of the finishing mill 37.
【００６２】図１１の構成において、板幅制御装置８０
は、板幅計５０で測定された仕上圧延後の板幅ＷF(x)と
目標幅ＷAIM の差にもとづき、仕上圧延機３１〜３７で
の幅減少量の総和が、 Δ｛ΣΔＷi(x)｝＝ＷF(x)−ＷAIM (15) だけ修正されるように張力の変更量Δσi を(13)式に基
づいて計算する。この制御には、周知の比例積分制御を
用いてもよい。(13)式中のＴi(x)の計算方法は図７の構
成の場合と同じである。In the configuration shown in FIG.
Is based on the difference between the target width W AIM and the width W F (x) after finish rolling measured by the width gauge 50, and the sum of the width reduction amounts in the finishing mills 31 to 37 is Δ ｛ΣΔW i (x)｝ = W F (x) −W AIM (15) The tension change amount Δσ i is calculated based on the equation (13) so as to be corrected by (15). A well-known proportional-integral control may be used for this control. The method of calculating T i (x) in equation (13) is the same as in the case of the configuration in FIG.
【００６３】図１２は、仕上圧延機入側に竪型圧延機が
ない圧延設備における、本発明の鋼板の板幅制御方法の
構成例を示す概要図である。図１１とは温度計４０の位
置が仕上圧延機３１の入側に配置されている点が異なっ
ている。FIG. 12 is a schematic diagram showing an example of the configuration of the method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the side of the finishing mill. 11 is different from FIG. 11 in that the thermometer 40 is located on the entry side of the finishing mill 31.
【００６４】図１２の構成では、仕上圧延機３１の入側
での圧延材の温度ＴIN(x) を直接測定するため、加熱装
置２０によって昇温することを温度推定装置６０で予測
する必要がない。また、温度制御装置１００は温度計の
測定温度に基づいて昇温量を決定するのではなく、予め
定められた昇温量だけ加熱装置２０に与えて粗圧延材を
加熱する。その他の制御動作は図１１の構成の場合と同
じである。In the configuration shown in FIG. 12, since the temperature T IN (x) of the rolled material at the entry side of the finishing mill 31 is directly measured, the temperature estimating device 60 must predict that the temperature will be increased by the heating device 20. There is no. Further, the temperature control device 100 does not determine the amount of temperature rise based on the temperature measured by the thermometer, but gives the predetermined amount of temperature increase to the heating device 20 to heat the rough rolled material. Other control operations are the same as those in the configuration of FIG.
【００６５】[0065]
【実施例】図１に示す圧延設備構成を用いて、低炭素鋼
をシミュレーション実験を行った。粗圧延機出側の圧延
方向の平均温度は９５０℃とし、加熱装置によって１０
５０℃に昇温した後、仕上圧延をした。粗圧延後の板幅
の目標値は１２３０ｍｍ、仕上圧延後の板幅の目標値は
１２１８ｍｍである。EXAMPLE A simulation experiment was conducted on low carbon steel using the rolling equipment configuration shown in FIG. The average temperature in the rolling direction on the exit side of the roughing mill was 950 ° C.
After the temperature was raised to 50 ° C., finish rolling was performed. The target value of the sheet width after the rough rolling is 1230 mm, and the target value of the sheet width after the finish rolling is 1218 mm.
【００６６】図１３は、実験結果を示すグラフであり、
同図(a) は温度計４０で測定した粗圧延材温度、同図
(b) は板幅計５０で測定した粗圧延材の板幅偏差、同図
(c) は竪型圧延機のロール開度、同図(d) は仕上圧延後
の板幅偏差である。FIG. 13 is a graph showing the results of the experiment.
FIG. 4A shows the rough rolled material temperature measured by the thermometer 40, and FIG.
(b) is the sheet width deviation of the rough rolled material measured by the sheet width meter 50, and FIG.
(c) is the roll opening of the vertical mill, and (d) is the width deviation after finish rolling.
【００６７】図１３(a) の粗圧延材温度をもとに加熱装
置２０での昇温を考慮し、図１３(b) の粗圧延後の板幅
偏差を修正すべく、図１３(c) の実線で示すように竪型
圧延機のロール開度を変更しながら圧延することによ
り、図１３(d) に示すように、仕上圧延後の板幅偏差は
小さく、良好な制御結果が得られた。FIG. 13 (c) is used to correct the sheet width deviation after the rough rolling shown in FIG. 13 (b) in consideration of the temperature rise in the heating device 20 based on the rough rolling material temperature shown in FIG. 13 (a). ), By changing the roll opening of the vertical rolling mill while changing the roll opening, as shown in FIG. 13 (d), the width deviation after finish rolling is small, and good control results are obtained. Was done.
【００６８】加熱装置２０での昇温を考慮しない場合の
圧延中の竪型圧延機開度の時間変化を板幅制御装置８０
でシミュレーションしたところ、図１３(c) の破線で示
されるロール開度であった。The time change of the vertical mill opening during rolling without considering the temperature rise in the heating device 20
As a result, the roll opening degree indicated by the broken line in FIG. 13 (c) was obtained.
【００６９】本発明方法である図１３(c) の実線に比べ
て、常に竪型圧延機のロール開度が狭く、また、圧延方
向位置に応じたロール開度変更量も大きくなっている。
これは加熱装置での圧延材の昇温を考慮しなかったため
に竪型圧延機で圧延するときの圧延材の温度を低く推定
し、竪型圧延機の板幅制御効果を過小評価したことが主
要因である。したがって、図１３(c) の破線で示される
開度では、仕上圧延後の板幅偏差は圧延方向全長にわた
って負となり、しかも圧延方向の板幅変動は図１３(d)
で示した本発明結果よりも大きくなることは明らかであ
る。As compared with the solid line in FIG. 13 (c), which is the method of the present invention, the roll opening of the vertical rolling mill is always narrow, and the roll opening change amount according to the position in the rolling direction is also large.
This did not take into account the temperature rise of the rolled material in the heating device, so the temperature of the rolled material when rolling in a vertical rolling mill was estimated to be low, and the effect of controlling the strip width of the vertical rolling mill was underestimated. This is the main factor. Therefore, at the opening indicated by the broken line in FIG. 13C, the sheet width deviation after finish rolling is negative over the entire length in the rolling direction, and the sheet width variation in the rolling direction is as shown in FIG.
It is clear that the result of the present invention is larger than that of the present invention.
【００７０】[0070]
【発明の効果】本発明の鋼板の板幅制御方法により、加
熱装置を備えた熱間圧延機において、加熱装置による鋼
板の温度条件変化に起因する、熱膨張による幅拡がり、
仕上圧延中の板幅の減少、張力や竪型圧延機のロール開
度操作による板幅制御効果に与える影響を考慮すること
ができ、板幅精度が向上する。According to the method for controlling the width of a steel sheet according to the present invention, in a hot rolling mill provided with a heating device, the width expansion due to thermal expansion caused by a change in the temperature condition of the steel sheet by the heating device,
It is possible to consider the influence of the decrease in the width of the sheet during the finish rolling, the effect on the sheet width control effect by the tension and the roll opening operation of the vertical rolling mill, and the accuracy of the sheet width is improved.
【図１】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 1 is a schematic diagram showing a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on an entrance side of a finishing mill.
【図２】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 2 is a schematic diagram illustrating a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on an entrance side of a finishing mill.
【図３】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 3 is a schematic diagram illustrating a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on an entrance side of a finishing mill.
【図４】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 4 is a schematic diagram showing a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on an entrance side of a finishing mill.
【図５】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 5 is a schematic diagram showing a configuration example of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on the entrance side of a finishing mill.
【図６】仕上圧延機入側に竪型圧延機を有する圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 6 is a schematic diagram showing a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having a vertical rolling mill on an entrance side of a finishing mill.
【図７】仕上圧延機入側に竪型圧延機がない圧延設備に
おける、本発明の鋼板の板幅制御方法の構成例を示す概
要図である。FIG. 7 is a schematic diagram showing an example of the configuration of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill.
【図８】仕上圧延機入側に竪型圧延機がない圧延設備に
おける、本発明の鋼板の板幅制御方法の構成例を示す概
要図である。FIG. 8 is a schematic diagram showing a configuration example of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill.
【図９】仕上圧延機入側に竪型圧延機がない圧延設備に
おける、本発明の鋼板の板幅制御方法の構成例を示す概
要図である。FIG. 9 is a schematic diagram showing a configuration example of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the entrance side of the finishing mill.
【図１０】仕上圧延機入側に竪型圧延機がない圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 10 is a schematic diagram showing an example of the configuration of a method for controlling the width of a steel sheet according to the present invention in a rolling facility that does not have a vertical rolling mill on the entrance side of a finishing mill.
【図１１】仕上圧延機入側に竪型圧延機がない圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 11 is a schematic diagram showing a configuration example of a method for controlling a sheet width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on a finishing rolling mill entry side.
【図１２】仕上圧延機入側に竪型圧延機がない圧延設備
における、本発明の鋼板の板幅制御方法の構成例を示す
概要図である。FIG. 12 is a schematic diagram showing a configuration example of a method for controlling the width of a steel sheet according to the present invention in a rolling facility having no vertical rolling mill on the side of the finish rolling mill.
【図１３】本発明の板幅制御方法を適用した結果を示す
グラフである。FIG. 13 is a graph showing the result of applying the sheet width control method of the present invention.
１０：粗圧延機 ２０：加熱装置 ３０：竪型圧延機 ３１〜３７：仕上圧延機 ４０：温度計 ５０：板幅計 ６０：温度推定装置 ７０：圧延ライン速度設定装置 ８０：板幅制御装置 ９０：張力制御装置 １００：温度制御装置 10: Rough rolling mill 20: Heating device 30: Vertical rolling mill 31-37: Finishing rolling mill 40: Thermometer 50: Strip width gauge 60: Temperature estimating apparatus 70: Rolling line speed setting apparatus 80: Strip width control apparatus 90 ： Tension control device 100 ： Temperature control device
Claims (4)
置にて昇温した後に竪型圧延機で幅方向に圧下し、つい
で仕上圧延機にて連続仕上圧延をする圧延設備を用い、
竪型圧延機のロール開度を変更することによって板幅を
制御する鋼板の板幅制御方法であって、加熱装置出側の
粗圧延材の温度測定値に基づいて推定した竪型圧延機で
幅圧下されるときの粗圧延材温度の推定値、または加熱
装置入側の粗圧延材の温度測定値をもとに加熱装置によ
る昇温を考慮して推定した竪型圧延機で幅圧下されると
きの粗圧延材温度の推定値に基づいて、竪型圧延機のロ
ール開度を決定することを特徴とする鋼板の板幅制御方
法。1. A rolling equipment for raising the temperature of a rough rolled material rolled by a rough rolling mill by a heating device, then reducing the width in a width direction by a vertical rolling mill, and then performing a continuous finish rolling by a finish rolling mill. Use
A method of controlling the width of a steel sheet by controlling the width of a roll by changing the roll opening of a vertical rolling mill, wherein the vertical rolling mill is estimated based on a temperature measurement value of a rough rolled material on a delivery side of a heating device. Estimated value of rough-rolled material temperature when width reduction is performed, or width-reduced by vertical rolling mill estimated in consideration of temperature rise by heating device based on temperature measurement value of rough-rolled material on the entrance side of heating device A roll opening degree of a vertical rolling mill is determined based on an estimated value of a rough rolled material temperature at the time of rolling.
温度の推定値が、幅方向の温度分布を含む推定値である
ことを特徴とする請求項１に記載の鋼板の板幅制御方
法。2. The steel sheet according to claim 1, wherein the estimated value of the rough-rolled material temperature when the width is reduced by the vertical rolling mill is an estimated value including a temperature distribution in the width direction. Width control method.
置にて昇温した後に仕上圧延機にて連続仕上圧延をする
圧延設備を用い、仕上圧延機のスタンド間張力を変更し
て板幅制御を行う鋼板の板幅制御方法であって、加熱装
置出側の粗圧延材の温度測定値に基づいて推定した仕上
圧延機のスタンド間の鋼板温度の推定値、または加熱装
置入側の粗圧延材の温度測定値をもとに加熱装置による
昇温を考慮して推定した仕上圧延機のスタンド間の鋼板
温度の推定値に基づいて、スタンド間張力を変更して板
幅制御を行うことを特徴とする鋼板の板幅制御方法。3. A rolling machine that raises the temperature of a rough rolled material rolled by a rough rolling mill by a heating device and then performs a continuous finish rolling by a finishing rolling mill, and changes the tension between stands of the finishing rolling mill. The width of the steel sheet between the stands of the finishing mill estimated based on the measured temperature value of the rough rolled material on the outlet side of the heating device, or the input value of the heating device. Width control by changing the tension between stands based on the estimated value of the temperature of the steel plate between stands of the finishing mill estimated based on the temperature measurement value of the rough rolled material on the side and considering the temperature rise by the heating device A width control method for a steel sheet.
の温度分布を含む推定値であることを特徴とする請求項
３に記載の鋼板の板幅制御方法。4. The method according to claim 3, wherein the estimated value of the steel sheet temperature between the stands is an estimated value including a temperature distribution in the width direction.
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| JP2000-138088 | 2000-05-11 | ||
| JP2000138088 | 2000-05-11 | ||
| JP2000185623A JP3584858B2 (en) | 2000-05-11 | 2000-06-21 | Steel width control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170117398A (en) * | 2015-03-10 | 2017-10-23 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Plate width control device of rolled material |
-
2000
- 2000-06-21 JP JP2000185623A patent/JP3584858B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170117398A (en) * | 2015-03-10 | 2017-10-23 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Plate width control device of rolled material |
| US20170341117A1 (en) * | 2015-03-10 | 2017-11-30 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Plate width control device for material to be rolled |
| KR102002237B1 (en) * | 2015-03-10 | 2019-07-19 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Plate width control device of rolled material |
| US10668514B2 (en) * | 2015-03-10 | 2020-06-02 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Plate width control device for material to be rolled |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3584858B2 (en) | 2004-11-04 |
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