JP3109067B2 - Strip width control method in hot continuous rolling - Google Patents

Strip width control method in hot continuous rolling

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Publication number
JP3109067B2
JP3109067B2 JP09114361A JP11436197A JP3109067B2 JP 3109067 B2 JP3109067 B2 JP 3109067B2 JP 09114361 A JP09114361 A JP 09114361A JP 11436197 A JP11436197 A JP 11436197A JP 3109067 B2 JP3109067 B2 JP 3109067B2
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JP
Japan
Prior art keywords
width
rolled
rolling
stand
sheet
Prior art date
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Expired - Fee Related
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JP09114361A
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Japanese (ja)
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JPH10286614A (en
Inventor
信次 馬場
Original Assignee
住友金属工業株式会社
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、熱間連続圧延機群
の入側に竪型エッジャーを備えた仕上圧延設備における
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 sheet width in a finishing mill having a vertical edger on the entrance side of a group of continuous hot rolling mills.

【0002】[0002]

【従来の技術】熱間連続圧延機は、一般にそれぞれ複数
の圧延スタンドを備えた粗圧延機群と仕上圧延機群とを
備えており、加熱したスラブを先ず粗圧延機群によって
25〜55mm程度の厚さに圧延したのち、仕上圧延機
群によって所定寸法の熱延鋼帯に仕上げられる。通常、
このようにして得られた熱延鋼帯には、数mmないし数
十mm程度の板幅変動(板幅偏差)が生じており、製品
品質不良あるいはサイドトリマによるトリミングによっ
て著しく歩留が低下するなどの欠点があった。
2. Description of the Related Art A hot continuous rolling mill generally includes a group of rough rolling mills each having a plurality of rolling stands and a group of finishing rolling mills. And then finished into a hot-rolled steel strip of a predetermined size by a group of finishing mills. Normal,
In the hot-rolled steel strip obtained in this manner, a sheet width variation (sheet width deviation) of about several mm to several tens mm occurs, and the yield is remarkably reduced due to poor product quality or trimming by a side trimmer. There were drawbacks such as.

【0003】前記板幅変動は、粗圧延機群によって生じ
るものと仕上圧延機群によって生じるものとに大別され
るが、特に仕上圧延機群によって発生する板幅変動は、
製品品質に重要な影響を与える。すなわち、粗圧延機群
によっても所定の板幅になるように圧延しなければなら
ないが、粗圧延機群によって所定の板幅に制御しても、
仕上圧延機群の板幅制御が確実に行わなければ、粗圧延
機群の制御が無意味になってしまう。
[0003] The sheet width fluctuations are roughly classified into those caused by a group of rough rolling mills and those caused by a group of finishing rolling mills.
Significantly impact product quality. In other words, although it is necessary to perform rolling so as to have a predetermined sheet width also by the rough rolling mill group, even if controlled to a predetermined sheet width by the rough rolling mill group,
Unless the width control of the finishing rolling mill group is reliably performed, the control of the rough rolling mill group becomes meaningless.

【0004】前記仕上圧延機群の板幅変動の発生原因と
しては、スキッドマークによる温度バラツキ、あるいは
被圧延材の長手方向各部の各スタンド間での通過時間の
バラツキ、換言すれば各スタンド間で被圧延材が受ける
張力および張力を付与されている時間のバラツキ等が挙
げられる。しかし、その原因が何であっても熱間仕上圧
延機の出側板幅変動は、狭幅部分では製品に必要とされ
る板幅を下回る虞れがあるため、従来はこのような板幅
変動を見込んで目標板幅を大きく設定せざるを得ず、製
品の仕上段階におけるトリミング量が大きくなって著し
く歩留が低下するという欠点があった。
[0004] The causes of the plate width fluctuation of the finishing mill group include temperature variations due to skid marks or variations in the transit time between the stands in the longitudinal direction of the material to be rolled, in other words, between the stands. There are variations in the tension applied to the material to be rolled and the time during which the tension is applied. However, no matter what the cause, the width variation of the exit side of the hot finishing mill may be smaller than the width required for the product in the narrow portion. There is a drawback that the target plate width must be set large in anticipation, and the amount of trimming at the finishing stage of the product becomes large, thereby significantly lowering the yield.

【0005】上記熱間仕上圧延機の出側板幅制御方法と
しては、被圧延材の張力を制御することによって板幅を
一定に制御する方法、竪型エッジャーを使用し、この開
度を調整することによって被圧延材の板幅を一定に制御
する方法、被圧延材の張力とスタンド間に配置された竪
型エッジャーの開度を調整することによって被圧延材の
板幅を一定に制御する方法の三つが提案されている。
[0005] As a method of controlling the exit side sheet width of the hot finishing mill, a method of controlling the sheet width to be constant by controlling the tension of the material to be rolled, a vertical edger is used, and the opening is adjusted. A method of controlling the plate width of the material to be rolled by controlling the tension of the material to be rolled and the opening of a vertical edger arranged between the stands to thereby keep the plate width of the material to be rolled constant Three have been proposed.

【0006】被圧延材の張力を制御することによって板
幅を一定に制御する方法としては、例えば、圧延機の入
側で板幅または板幅偏差を検出し、該板幅または板幅偏
差に基づいて圧延機の後方張力調整を行う方法(特公昭
58−51769号公報)、熱間仕上圧延機のスタンド
間における被圧延材の板幅または板幅偏差を検出し、該
検出値に基づき上流スタンドのミルモータの速度を調節
し、被圧延材のスタンド間張力を制御することによって
板幅を一定に制御する方法(特開昭60−141319
号公報)が提案されている。
[0006] As a method of controlling the sheet width to be constant by controlling the tension of the material to be rolled, for example, a sheet width or a sheet width deviation is detected at the entrance of a rolling mill, and the sheet width or the sheet width deviation is detected. (Japanese Patent Publication No. 58-51769), a method for detecting a sheet width or a sheet width deviation of a material to be rolled between stands of a hot finishing rolling mill, based on the detected value, A method in which the speed of a mill motor of a stand is adjusted to control the tension between the stands of a material to be rolled to control the plate width to be constant (JP-A-60-141319).
Publication).

【0007】また、竪型エッジャーを使用し、この開度
を調整することによって被圧延材の板幅を一定に制御す
る方法としては、連続仕上圧延機のスタンド間における
ストリップの板幅または板幅偏差を検出し、該検出値に
基づきスタンド間に設置した竪型エッジャーのロール開
度を調節することにより板幅を所定の寸法に制御する方
法(特開昭62−57705号公報)、圧延機の入側に
複数のロールをハウジング内に被圧延材の移動方向に沿
って配列した一対のサイドロールを設置し、圧延機出側
の被圧延材の板幅を検出し、検出した板幅に基づいてサ
イドロールの被圧延材の圧下量を決定し、前記板幅が設
定値となるよう前記サイドロールを制御する方法(特公
平3−78166号公報)、連続熱間圧延機の入側にエ
ッジャーを設置し、エッジャー入側で被圧延材の板幅方
向温度分布を測定し、連続熱間圧延機出側で被圧延材の
板幅を測定し、さらに、巻取機の近傍で被圧延材の板幅
を測定し、上記各測定値をもとに所定の式によりエッジ
ャー開度を制御する方法(特公平6−18653号公
報)が提案されている。
As a method of controlling the width of the material to be rolled to be constant by using a vertical edger and adjusting the degree of opening, there is a method of controlling the width or width of a strip between stands of a continuous finishing mill. A method of detecting a deviation and controlling the roll width of a vertical edger installed between stands based on the detected value to control the sheet width to a predetermined size (Japanese Patent Laid-Open No. 62-57705); A pair of side rolls in which a plurality of rolls are arranged in the housing along the moving direction of the material to be rolled on the entrance side of the rolling mill are installed, and the sheet width of the material to be rolled on the exit side of the rolling mill is detected, and A method of determining the amount of reduction of the material to be rolled on the side rolls based on the side rolls and controlling the side rolls so that the sheet width becomes a set value (Japanese Patent Publication No. 3-78166). Install the edger Measure the temperature distribution in the width direction of the material to be rolled at the edger entry side, measure the width of the material to be rolled at the exit side of the continuous hot rolling mill, and further measure the width of the material to be rolled near the winder. A method has been proposed in which the edger opening is controlled by a predetermined formula based on the above measured values (JP-B-6-18653).

【0008】さらに、被圧延材の張力とスタンド間に配
置された竪型エッジャーの開度を調整することによって
被圧延材の板幅を一定に制御する方法としては、所定の
スタンド間前方で被圧延材の温度および板幅を検出し、
検出された被圧延材の温度および板幅に基づき前記所定
のスタンド間で前記被圧延材に負荷する張力を決定し、
前記被圧延材の温度および板幅の検出された部分が前記
所定のスタンド間に到達した時点で、そのスタンド間の
張力を決定された張力として前記被圧延材の板幅を修正
し、前記所定のスタンド間において板幅を修正された被
圧延材の実績板幅と温度を検出し、検出された実績板幅
から前記所定スタンドにおける幅修正の誤差を検出し、
検出された幅修正誤差および温度に基づき、前記所定の
スタンド間以降のスタンド間に備えられる竪型エッジャ
ーのロール開度を調整する方法(特開昭62−1560
10号公報)が提案されている。
[0008] Further, as a method of controlling the plate width of the material to be rolled to be constant by adjusting the tension of the material to be rolled and the opening of the vertical edger disposed between the stands, there is a method of controlling the width of the material to be rolled in front of a predetermined stand. Detects rolled material temperature and strip width,
Determine the tension applied to the material to be rolled between the predetermined stand based on the detected temperature and the width of the material to be rolled,
At the time when the detected temperature and the width of the material to be rolled reach between the predetermined stands, the tension between the stands is corrected as the determined tension to correct the width of the material to be rolled, and the predetermined width is corrected. Detecting the actual plate width and temperature of the material to be rolled whose plate width has been corrected between the stands, detecting an error of the width correction in the predetermined stand from the detected actual plate width,
A method of adjusting the roll opening of a vertical edger provided between stands after the predetermined stand based on the detected width correction error and temperature (Japanese Patent Laid-Open No. 62-1560).
No. 10) has been proposed.

【0009】[0009]

【発明が解決しようとする課題】上記被圧延材の張力を
制御する特公昭58−51769号公報、特開昭60−
141319号公報に開示の方法は、被圧延材の大幅な
板幅制御を行う場合、以下のような問題点を有してい
る。 (1) 被圧延材の板幅・板厚方向の温度バラツキの影
響によって板幅変化量が大きい。 (2) 制御応答性が遅い。 (3) 張力変動により、被圧延材の通板性が不安定と
なる。
To control the tension of the material to be rolled, Japanese Patent Publication No. 58-51769 and Japanese Patent Application Laid-open No.
The method disclosed in Japanese Patent Application Laid-Open No. 141319 has the following problems in the case where a large width control of a material to be rolled is performed. (1) The change in the sheet width is large due to the influence of temperature variations in the sheet width and sheet thickness direction of the material to be rolled. (2) Control response is slow. (3) Due to the tension fluctuation, the rolling property of the material to be rolled becomes unstable.

【0010】竪型エッジャーの開度を制御する特公平3
−78166号公報に開示の方法は、スタンド間竪型エ
ッジャーを用いるため、被圧延材の板厚が20mm以下
と薄く、バックリング発生あるいは被圧延材の通板性が
不安定となって水平圧延での絞り込みが生じる虞れがあ
るという問題点を有している。また、特公平6−186
53号公報に開示の方法は、仕上圧延機入側での被圧延
材の温度分布と仕上圧延機出側板幅の測定実績と巻取直
前の板幅に基づいて仕上圧延機入側竪型エッジャーを制
御しているため、被圧延材の長手方向の制御遅れが生じ
る欠点がある。
[0010] Tokuho 3 to control the opening of the vertical edger
In the method disclosed in Japanese Patent No. 78166/1992, since a vertical edger between stands is used, the thickness of the material to be rolled is as thin as 20 mm or less, and buckling occurs or the sheeting property of the material to be rolled becomes unstable, resulting in horizontal rolling. There is a problem that there is a possibility that narrowing down may occur. 6-186
The method disclosed in Japanese Patent No. 53 is based on the temperature distribution of the material to be rolled on the entrance side of the finishing mill, the measurement result of the width of the sheet on the exit side of the finishing mill, and the width of the sheet just before winding. Therefore, there is a disadvantage that a control delay in the longitudinal direction of the material to be rolled occurs.

【0011】被圧延材の張力と竪型エッジャーの開度を
制御する特開昭62−156010号公報に開示の方法
は、スタンド間竪型エッジャーを用いるため、被圧延材
の板厚が20mm以下と薄く、バックリング発生あるい
は被圧延材の通板性が不安定となって水平圧延での絞り
込みが生じる虞れがあるという問題点を有している。
The method disclosed in Japanese Patent Application Laid-Open No. 62-156010 for controlling the tension of the material to be rolled and the opening of the vertical edger uses a vertical edger between stands, so that the thickness of the material to be rolled is 20 mm or less. Therefore, there is a problem that buckling may occur or the rolling property of the material to be rolled may be unstable and narrowing may occur in horizontal rolling.

【0012】本発明の目的は、上記従来技術の欠点を解
消し、被圧延材の長手方向での応答遅れを防止できると
共に、幅圧下量を大きくでき、高精度で板幅制御が可能
な熱間連続圧延における板幅制御方法を提供することに
ある。
An object of the present invention is to solve the above-mentioned drawbacks of the prior art, to prevent a response delay in the longitudinal direction of a material to be rolled, to increase a width reduction amount, and to control a sheet width with high accuracy and a high precision. An object of the present invention is to provide a method for controlling a sheet width in continuous rolling during hot rolling.

【0013】[0013]

【課題を解決するための手段】本発明の熱間連続圧延に
おける板幅制御方法は、複数の圧延スタンド列からなる
熱間連続圧延機群の入側に竪型エッジャーを備えた仕上
圧延設備の板幅制御方法において、前記熱間連続圧延機
群の第1スタンドと第2スタンドの間で被圧延材の板幅
を測定し、測定した板幅と圧延スケジュールに基づき予
め設定された前記第1スタンド出側の板幅目標値との偏
差を算出し、該偏差に基づき竪型エッジャーの幅圧下量
を修正することとしている。このように、熱間連続圧延
機群の第1スタンドと第2スタンドの間で被圧延材の板
幅を測定し、測定した板幅と圧延スケジュールに基づき
予め設定された前記第1スタンド出側の板幅目標値との
偏差を算出し、該偏差に基づき竪型エッジャーの幅圧下
量を修正することによって、竪型エッジャーの幅圧下に
伴うドッグボーンの幅戻りおよび幅広がりのセットアッ
プ計算誤差を応答性速く修正できる。また、竪型エッジ
ャーでの幅圧下は、被圧延材の板厚の厚い仕上圧延機群
の入側で幅圧下するため、バックリング発生あるいは被
圧延材の通板性が不安定となって水平圧延での絞り込み
が生じることもなく、高精度で被圧延材の板幅制御を実
施でき、製品品質不良が低減すると共に、サイドトリミ
ング量が減少して著しい歩留向上を図ることができる。
According to the present invention, there is provided a method for controlling a sheet width in hot continuous rolling, comprising the steps of a finishing mill having a vertical edger on the entry side of a continuous hot rolling mill group comprising a plurality of rolling stand rows. In the strip width control method, a strip width of a material to be rolled is measured between a first stand and a second stand of the hot continuous rolling mill group, and the first strip is set in advance based on the measured strip width and a rolling schedule. The deviation from the target plate width on the stand exit side is calculated, and the width reduction of the vertical edger is corrected based on the deviation. In this way, the width of the material to be rolled is measured between the first stand and the second stand of the hot continuous rolling mill group, and the first stand exit side preset based on the measured sheet width and the rolling schedule is set. By calculating the deviation from the target value of the sheet width and correcting the width reduction of the vertical edger based on the deviation, the error in the setup calculation of the width return and width expansion of the dog bone accompanying the width reduction of the vertical edger is reduced. Responsiveness can be corrected quickly. In addition, the width reduction by the vertical edger reduces the width at the entry side of the group of finishing mills where the thickness of the material to be rolled is large. It is possible to control the sheet width of the material to be rolled with high accuracy without causing any reduction in rolling, to reduce defective product quality, and to reduce the amount of side trimming to significantly improve the yield.

【0014】[0014]

【発明の実施の形態】本発明の仕上圧延機群の板幅制御
は、大きく分けるとセットアップ制御とエッジャー自動
板幅制御の二つで構成される。セットアップ制御は、最
終製品の板幅を求めるために仕上圧延機群の入側に設置
された板幅検出器および被圧延材の表面温度検出器によ
り被圧延材の板幅Wと表面温度Tcを検出する。そして
検出された前記板幅W、表面温度Tcならびに鋼種、製
品寸法別に予め記憶された出側板幅検出器通過時点の目
標板幅Wbに基づき、仕上圧延機群の各スタンドの速
度、ロール開度および竪型エッジャーの圧下量ΔEを演
算制御するものである。この時、第1スタンド出側の板
幅検出器通過時点での目標板幅Waも同時に決定され
る。
BEST MODE FOR CARRYING OUT THE INVENTION The sheet width control of a group of finishing mills according to the present invention can be broadly divided into a setup control and an automatic edger sheet width control. The setup control determines the sheet width W and the surface temperature Tc of the material to be rolled by the sheet width detector and the surface temperature detector of the material to be rolled which are installed on the entrance side of the finishing mill group in order to obtain the sheet width of the final product. To detect. Then, based on the detected sheet width W, surface temperature Tc, and target sheet width Wb at the time of passing the exit side sheet width detector stored in advance for each steel type and product size, the speed and roll opening of each stand of the finishing mill group. And the amount of reduction ΔE of the vertical edger is calculated and controlled. At this time, the target plate width Wa at the time when the plate width detector on the exit side of the first stand passes is also determined.

【0015】この場合において、仕上圧延後の鋼板の目
標板幅をWb、竪型エッジャー入側板幅をW、幅戻り率
をηとすると、目標板幅Wbを達成するための竪型エッ
ジャー圧下量ΔEは、(1)式で与えられる。 ΔE=(W−Wb+ΔWH)/(1−η)…(1) ΔWH : 幅拡がり η=f(W、H、RE、R、Tc)…(2) ただし、W : 入側板幅(mm)、H : 入側板厚
(mm)、RE : エッジャーロール径(mm)、R
: 水平ロール径(mm)、Tc : 入側温度
(℃)
In this case, assuming that the target sheet width of the steel sheet after finish rolling is Wb, the vertical sheet width of the side of the vertical edger is W, and the width return rate is η, the vertical edger reduction amount to achieve the target sheet width Wb. ΔE is given by equation (1). ΔE = (W−Wb + ΔW H ) / (1−η) (1) ΔW H : Width expansion η = f (W, H, RE, R, Tc) (2) where W: Width of entry side plate (mm) ), H: Inlet plate thickness (mm), RE: Edger roll diameter (mm), R
: Horizontal roll diameter (mm), Tc: Inlet temperature (° C)

【0016】また、エッジャー自動板幅制御は、前記セ
ットアップ制御により仕上圧延を開始し、被圧延材の先
端部が第1スタンド出側の板幅検出器に到達した時点か
ら、測定した板幅W1と前記第1スタンド出側の目標板
幅Waとを対比して(3)式により板幅偏差ΔWaを算
出する。 ΔWa=Wa−W1…(3) その偏差ΔWaがゼロに近づくように竪型エッジャーの
圧下修正量ΔEaを(4)式により演算し、竪型エッジ
ャーによる板幅制御を行うものである。 ΔEa=(ΔWa+ΔWHa)/(1−η)…(4) ただし、ΔWHa : 第1スタンドでの幅拡がり
In the edger automatic sheet width control, finish rolling is started by the set-up control, and the sheet width W measured from the time when the leading end of the material to be rolled reaches the sheet width detector on the exit side of the first stand. 1 is compared with the target plate width Wa on the first stand exit side, and a plate width deviation ΔWa is calculated by equation (3). ΔWa = Wa−W 1 (3) The correction amount ΔEa of the vertical edger is reduced by the equation (4) so that the deviation ΔWa approaches zero, and the width control by the vertical edger is performed. ΔEa = (ΔWa + ΔW H a ) / (1-η) ... (4) However, ΔW H a: width expansion of the first stand

【0017】上記エッジャー自動板幅制御は、第1スタ
ンド出側の板幅検出器の検出結果に基づく制御であり、
竪型エッジャーの幅圧下に伴うドッグボーンの幅戻りΔ
Mおよび水平圧延による幅広がりΔWHのセットアップ
計算誤差を修正するため、応答性も速く、被圧延材の長
手方向の板幅偏差を非常に小さくでき、高精度の板幅制
御を実施することができる。
The above-described automatic edger width control is a control based on the detection result of the width detector on the exit side of the first stand.
Return of dog bone width due to width reduction of vertical edger Δ
To correct the setup calculation error of W M and broadening [Delta] W H by the horizontal rolling, responsiveness is fast, can very small longitudinal direction of the plate width deviation of the rolled material, carrying out the plate width control precision that Can be.

【0018】本発明で用いる板幅検出器としては、被圧
延材の板幅が検出できればよく、特に限定されないが、
例えば下部光源方式、赤外線方式があるが、いずれも検
出部の回転スリット機構内を通過する光を検出器でパル
ス状電気信号に変換し、回転スリットが板エッジ部の明
暗を通過する際の急激な光量変化から板幅を検出する。
また、本発明で用いる被圧延材の表面温度を検出する温
度検出器としては、被圧延材の表面温度を検出できれば
よく、特に限定されないが、例えば、放射温度計が挙げ
られる。
The sheet width detector used in the present invention is not particularly limited as long as it can detect the sheet width of the material to be rolled.
For example, there are a lower light source system and an infrared system, both of which convert light passing through the rotating slit mechanism of the detecting unit into a pulse-like electric signal with a detector, and abruptly when the rotating slit passes through the brightness of the plate edge. The board width is detected from the change in the amount of light.
The temperature detector for detecting the surface temperature of the material to be rolled used in the present invention is not particularly limited as long as it can detect the surface temperature of the material to be rolled, and examples thereof include a radiation thermometer.

【0019】[0019]

【実施例】【Example】

実施例1 以下に本発明の熱間連続圧延における板幅制御方法の詳
細を実施の一例を示す図1ないし図3に基づいて説明す
る。図1は本発明の熱間連続圧延における板幅制御方法
を説明のための概略全体配置図、図2は仕上圧延機群入
側竪型エッジャーの圧下位置演算および圧下修正量演算
の概略系統図で、(a)図は仕上圧延機群入側竪型エッ
ジャーの圧下位置演算の概略系統図、(b)図は仕上圧
延機群入側竪型エッジャーの圧下修正量演算の概略系統
図、図3は被圧延材の製品板幅と各位置における目標板
幅と製品板幅の偏差との関係の一例を示すグラフであ
る。
Embodiment 1 Hereinafter, a method of controlling a sheet width in hot continuous rolling according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a schematic general layout diagram for explaining a sheet width control method in hot continuous rolling according to the present invention, and FIG. 2 is a schematic system diagram of a rolling position calculation and a rolling correction amount calculation of a vertical edger on a finishing rolling mill group entrance side. Fig. (A) is a schematic diagram of the rolling position calculation of the vertical edger on the entrance side of the finishing mill group, and (b) is a schematic diagram of the reduction amount calculation of the vertical edger on the entering side of the finishing mill group. 3 is a graph showing an example of the relationship between the product plate width of the material to be rolled and the deviation between the target plate width and the product plate width at each position.

【0020】図1において、1は第1スタンド1−1
第2スタンド1−2、…第nスタンド1−nからなる仕上
圧延機群で、通常6〜7スタンドから構成されている。
2は仕上圧延機群1の入側に設置した竪型エッジャー、
3は仕上圧延機群1の入側に設置した板幅検出器、4は
第1スタンド1−1の出側に設置した板幅検出器、5は
仕上圧延機群1の出側に設置した板幅検出器である。6
は仕上圧延機群1の入側に設置した粗圧延機群により粗
圧延された被圧延材7の表面温度を検出する温度検出器
である。8はフィードバック板幅制御用の制御部で、前
記各板幅検出器3〜5で検出された板幅および温度検出
器6で検出された被圧延材7の表面温度が入力される。
9は仕上圧延された熱延鋼帯である。
[0020] In Figure 1, the first stand 1 1 1,
Second stand 1-2 ,... A group of finishing mills consisting of the n-th stand 1- n , which is usually composed of 6 to 7 stands.
2 is a vertical edger installed on the entrance side of the finishing mill group 1,
3 plate width detector installed at the entry side of the finishing mill group 1, 4 is the plate width detector installed in the outlet side of the first stand 1 1, 5 was placed on the exit side of the finishing mill group 1 It is a plate width detector. 6
Is a temperature detector for detecting the surface temperature of the material 7 to be roughly rolled by the rough rolling mill group installed on the entry side of the finishing mill group 1. Reference numeral 8 denotes a control unit for controlling the feedback plate width, to which the plate width detected by each of the plate width detectors 3 to 5 and the surface temperature of the material 7 to be rolled detected by the temperature detector 6 are inputted.
9 is a finish-rolled hot-rolled steel strip.

【0021】制御部8は、板幅検出器3および温度検出
器6から被圧延材7の板幅および表面温度が入力される
と、被圧延材7の鋼種ならびに製品寸法別に予め記憶し
た板幅検出器4、5を通過時点での目標板幅に基づき、
仕上圧延機群1の各スタンド1−1、1−2、…1−n
速度、ロール開度を演算する。また、制御部8は、鋼種
ならびに製品寸法別に予め記憶した板幅検出器4、5を
通過時点での目標板幅に基づき、例えば、図3に示すよ
うな各板幅検出器4、5を通過時点での目標板幅と製品
板幅との差に基づき、各板幅検出器4、5を通過時点で
の目標板幅Wa、Wbを演算する。さらに、制御部8
は、図2(a)に示すとおり、最終目標板幅Wbと板幅
検出器3および温度検出器6から入力された被圧延材7
の板幅Wおよび表面温度Tcに基づき、仕上圧延機群1
入側の竪型エッジャー2のエッジング量ΔEを前記
(1)式により演算する。そして、制御部8は、仕上圧
延機群1の各スタンド1−1、1−2、…1−nと竪型エ
ッジャー2を演算した圧延スケジュールで圧延開始する
よう構成されている。
When the controller 8 receives the sheet width and the surface temperature of the material 7 to be rolled from the sheet width detector 3 and the temperature detector 6, the controller 8 stores the sheet width previously stored for each steel type and product size of the material 7 to be rolled. Based on the target plate width at the time of passing through the detectors 4 and 5,
Each stand 1 1 of the finishing mill group 1, 1 2, ... 1-n rate of, for calculating a roll angle. Further, based on the target sheet width at the time of passing through the sheet width detectors 4 and 5 previously stored for each steel type and product size, the control unit 8 controls each of the sheet width detectors 4 and 5 as shown in FIG. Based on the difference between the target plate width at the time of passing and the product plate width, the target plate widths Wa and Wb at the time of passing through the respective plate width detectors 4 and 5 are calculated. Further, the control unit 8
As shown in FIG. 2A, the final target sheet width Wb and the material 7 to be rolled inputted from the sheet width detector 3 and the temperature detector 6
Finishing mill group 1 based on the sheet width W and the surface temperature Tc of
The edging amount ΔE of the vertical edger 2 on the entry side is calculated by the above equation (1). Then, the control unit 8, each stand 1 1 of the finishing mill group 1, 1 2, and is configured to start rolling in the rolling schedule calculated to ... 1-n and the vertical edger 2.

【0022】また、制御部8は、前記セットアップ制御
による圧延スケジュールで圧延を開始したのち、被圧延
材7の先端部が第1スタンド1−1の出側の板幅検出器
4に到着した時点から、図2(b)に示すとおり、板幅
検出器4から入力される実測板幅W1と前記目標板幅W
aとの偏差ΔWaを前記(3)式により演算し、その偏
差ΔWaがゼロとなる竪型エッジャー2の圧下位置修正
量ΔEaを前記(4)式により演算し、竪型エッジャー
2の圧下位置を修正するよう構成されている。さらに、
制御部8は、第1スタンド1−1出側の板幅検出器4通
過時点での目標板幅Waを、仕上圧延機群1出側の板幅
検出器5から入力される熱延鋼帯9の実測板幅W2と板
幅検出器5通過時点の目標板幅Wbとの偏差ΔWbから
学習して常に最適の目標板幅となるよう演算修正するエ
ッジャー自動板幅制御を行うよう構成されている。
Further, when the control unit 8, after starting the rolling at rolling schedule by the set-up control, the tip of the rolled material 7 has arrived at the first stand 1 1 of the delivery side of the strip width detector 4 From FIG. 2, as shown in FIG. 2B, the measured plate width W 1 input from the plate width detector 4 and the target plate width W
The deviation ΔWa from the vertical edger 2 is calculated by the above equation (3), and the reduction amount ΔEa of the vertical position of the vertical edger 2 at which the deviation ΔWa becomes zero is calculated by the above equation (4). It is configured to correct. further,
Control unit 8, the hot rolled strip to a target strip width Wa, which is input from the plate width detector 5 of the finishing mill group 1 delivery side of a plate width detector 4 passes through the point of the first stand 1 1 Output side The edger automatic plate width control is performed by learning from the deviation ΔWb between the measured plate width W 2 of No. 9 and the target plate width Wb at the time of passing through the plate width detector 5 and always calculating and correcting the optimum target plate width. ing.

【0023】上記のとおり構成したことによって、制御
部8は、図示しない熱間粗圧延機群で粗圧延された被圧
延材7の板幅Wと表面温度Tcが板幅検出器3および温
度検出器6から入力されると、被圧延材7の鋼種ならび
に製品寸法別に予め決定された各板幅検出器3、4、5
を通過時点での目標板幅に基づき、仕上圧延機群1の各
スタンド1−1、1−2、…1−nの速度、ロール開度を
演算する。また、制御部8は、鋼種ならびに製品寸法別
に予め記憶した板幅検出器4、5を通過時点での目標板
幅に基づき、例えば、図3に示すような各板幅検出器
4、5を通過時点での目標板幅と製品板幅との差に基づ
き、各板幅検出器4、5を通過時点での目標板幅Wa、
Wbを演算する。さらに、制御部8は、図2(a)に示
すとおり、最終目標板幅Wbと板幅検出器3および温度
検出器6から入力された被圧延材7の板幅Wおよび表面
温度Tcに基づき、仕上圧延機群1入側の竪型エッジャ
ー2のエッジング量ΔEを前記(1)式により演算す
る。そして、制御部8は、仕上圧延機群1の各スタンド
1−1、1−2、…1−nと竪型エッジャー2を演算した
セットアップ制御による圧延スケジュールで圧延開始す
る。
With the above-described configuration, the control unit 8 controls the sheet width detector 3 and the temperature detection by the sheet width W and the surface temperature Tc of the material 7 to be rolled rough by a group of hot rough rolling mills (not shown). When input from the device 6, each of the sheet width detectors 3, 4, 5 determined in advance for each steel type and product size of the material 7 to be rolled.
The basis of the target plate width in the pass point, the stand 1 1 of the finishing mill group 1, 1 2, ... 1-n rate of, for calculating a roll angle. Further, based on the target sheet width at the time of passing through the sheet width detectors 4 and 5 previously stored for each steel type and product size, the control unit 8 controls each of the sheet width detectors 4 and 5 as shown in FIG. Based on the difference between the target plate width at the time of passing and the product plate width, the target plate width Wa at the time of passing through each of the plate width detectors 4 and 5,
Calculate Wb. Further, as shown in FIG. 2A, the control unit 8 determines the final target sheet width Wb and the sheet width W and the surface temperature Tc of the material 7 to be rolled inputted from the sheet width detector 3 and the temperature detector 6. The edging amount ΔE of the vertical edger 2 on the entry side of the finishing mill group 1 is calculated by the above equation (1). Then, the control unit 8, finishing each stand 1 1 of the rolling mill group 1, 1 2, ... to start rolling in rolling schedule by the calculated up controlled 1-n and vertical edger 2.

【0024】圧延が開始されると制御部8は、図2
(b)に示すとおり、第1スタンド1−1出側の前記目
標板幅Waと板幅検出器4から入力される実測板幅W1
との偏差ΔWaを前記(3)式により算出し、その偏差
ΔWaがゼロとなる竪型エッジャー2の圧下位置修正量
ΔEaを前記(4)式により演算し、竪型エッジャー2
の圧下修正制御を実施する。さらに、制御部8は、第1
スタンド1−1出側の板幅検出器4通過時点での目標板
幅Waを、仕上圧延機群1出側の板幅検出器5から入力
される熱延鋼帯9の板幅W2と板幅検出器5通過時点の
目標板幅Wbの偏差ΔWbから学習して常に最適の目標
板幅となるよう演算修正する。したがって、仕上圧延さ
れた熱延鋼帯9は、先端部を除いた全長に亘って板幅偏
差が非常に小さくなり、高精度の板幅制御が可能とな
る。
When the rolling is started, the control unit 8
As shown in (b), the measured strip width W 1 which is input from the first stand 1 1 delivery side the target plate width Wa and the plate width detector 4
Is calculated by the above equation (3), and the amount of correction ΔEa of the vertical position of the vertical edger 2 at which the deviation ΔWa becomes zero is calculated by the above equation (4).
Is performed. Further, the control unit 8 controls the first
The target plate width Wa in the plate width detector 4 passes when the stand 1 1 delivery side, a plate width W 2 of the hot rolled strip 9 which is input from the plate width detector 5 of the finishing mill group 1 delivery side Learning is performed from the deviation ΔWb of the target plate width Wb at the time of passing through the plate width detector 5, and the calculation is corrected so that the optimum target plate width is always obtained. Therefore, in the hot-rolled steel strip 9 that has been finish-rolled, the sheet width deviation is very small over the entire length excluding the tip, and the sheet width can be controlled with high accuracy.

【0025】実施例2 粗圧延機群で粗圧延された厚さ50mm、板幅1020
mmのバーを7スタンドからなる仕上圧延機群を用い、
仕上圧延速度600m/minで仕上圧延して板厚2.
0mm、板幅1000mmの熱延鋼帯を製造するに際
し、仕上圧延機群出側に設置した板幅検出器の検出結果
と製品目標板幅との偏差に基づき、仕上圧延機群入側の
竪型エッジャーの幅圧下修正量を演算制御した従来例
と、仕上圧延機群の第1スタンド出側に設置した板幅検
出器の検出結果と目標板幅との偏差に基づき、仕上圧延
機群入側の竪型エッジャーの幅圧下修正量を演算制御し
た本発明例のそれぞれについて、製品目標板幅と製品板
幅実績値から仕上幅偏差ΔWを求めると共に、製品歩留
を求めた。その結果を表1に示す。
Example 2 A thickness of 50 mm and a width of 1020 were roughly rolled by a rough rolling mill group.
mm bar using a finishing mill group consisting of 7 stands,
Finish rolling at a finish rolling speed of 600 m / min.
When producing a hot-rolled steel strip having a width of 0 mm and a width of 1000 mm, the vertical width of the entrance side of the finishing mill group is determined based on the deviation between the detection result of the width detector and the target product width. A conventional example in which the width reduction correction amount of the die edger is arithmetically controlled, and a finishing rolling mill group input based on a deviation between a target width and a detection result of a sheet width detector installed on the exit side of the first stand of the finishing rolling mill group. For each of the examples of the present invention in which the width reduction amount of the vertical edger on the side was arithmetically controlled, the finishing width deviation ΔW was obtained from the product target plate width and the actual product width, and the product yield was obtained. Table 1 shows the results.

【0026】[0026]

【表1】 [Table 1]

【0027】表1に示すとおり、仕上圧延機群出側に設
置した板幅検出器の検出結果と製品目標板幅との偏差に
基づき、仕上圧延機群入側の竪型エッジャーの幅圧下修
正量を演算制御した従来例は、仕上幅偏差ΔWが2.5
mmであるのに対し、仕上圧延機群の第1スタンド出側
に設置した板幅検出器の検出結果と目標板幅との偏差に
基づき、仕上圧延機群入側の竪型エッジャーの幅圧下修
正量を演算制御した本発明例は、仕上幅偏差ΔWが0.
8mmであり、従来例に比較して高精度の板幅制御が可
能で、製品歩留が0.17%向上した。
As shown in Table 1, the width reduction of the vertical edger on the entrance side of the finishing mill group is corrected based on the deviation between the detection result of the sheet width detector installed on the exit side of the finishing mill group and the target sheet width. In the conventional example in which the amount is arithmetically controlled, the finish width deviation ΔW is 2.5
mm, based on the deviation between the target width and the detection result of the strip width detector installed on the exit side of the first stand of the finishing mill group, the width reduction of the vertical edger on the entrance side of the finishing mill group In the example of the present invention in which the correction amount is arithmetically controlled, the finishing width deviation ΔW is equal to 0.
The width is 8 mm, which enables a more accurate control of the width of the sheet than in the conventional example, and the product yield is improved by 0.17%.

【0028】[0028]

【発明の効果】本発明の熱間連続圧延における板幅制御
方法は、仕上圧延機群の第1スタンド出側に設置した板
幅検出器の検出結果と目標板幅との偏差に基づき、仕上
圧延機群入側の竪型エッジャーの幅圧下修正量を演算制
御するから、応答性が速く、また、仕上圧延機群入側で
幅圧下するため、板厚も25〜55mmと十分に厚く、
幅圧下修正量も大きくできるため、高精度で板幅制御で
き、製品品質不良の低減ならびにサイドトリミング量減
少により著しい歩留向上を図ることができる。
According to the present invention, the method for controlling the width of a strip in hot continuous rolling is based on a deviation between a target width and a detection result of a strip width detector installed on the exit side of a first stand of a finishing mill group. Since the width reduction correction amount of the vertical edger on the entrance side of the rolling mill group is arithmetically controlled, the response is fast, and the width is reduced on the entrance side of the finishing mill group, so that the sheet thickness is also sufficiently thick as 25 to 55 mm.
Since the width reduction amount can be increased, the width of the plate can be controlled with high accuracy, and the yield can be significantly improved by reducing the defective product quality and reducing the amount of side trimming.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の熱間連続圧延における板幅制御方法を
説明のための概略全体配置図である。
FIG. 1 is a schematic overall layout diagram for explaining a sheet width control method in hot continuous rolling according to the present invention.

【図2】仕上圧延機群入側竪型エッジャーの圧下位置演
算および圧下修正量演算の概略系統図で、(a)図は仕
上圧延機群入側竪型エッジャーの圧下位置演算の概略系
統図、(b)図は仕上圧延機群入側竪型エッジャーの圧
下修正量演算の概略系統図である。
FIG. 2 is a schematic system diagram of a rolling position calculation and a reduction amount calculation of a vertical edger on the entrance side of a finishing mill group, and FIG. 2 (a) is a schematic system diagram of a rolling position calculation of a vertical edger on the entrance side of a finishing mill group. And (b) is a schematic system diagram of the calculation of the amount of reduction of the vertical edger on the entrance side of the finishing mill group.

【図3】被圧延材の製品板幅と各板幅検出位置における
目標板幅との偏差との関係の一例を示すグラフである。
FIG. 3 is a graph showing an example of a relationship between a product plate width of a material to be rolled and a deviation from a target plate width at each plate width detection position.

【符号の説明】[Explanation of symbols]

1 仕上圧延機群 1−1 第1スタンド 1−2 第2スタンド 1−n 第nスタンド 2 竪型エッジャー 3、4、5 板幅検出器 6 温度検出器 7 被圧延材 8 制御部 9 熱延鋼帯1 finishing mill group 1 1 first stand 1 2 second stand 1 n n-th stand 2 vertical edger 3,4,5 plate width detector 6 temperature detector 7 the rolled material 8 controller 9 hot rolled Steel strip

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 複数の圧延スタンド列からなる熱間連続
圧延機群の入側に竪型エッジャーを備えた仕上圧延設備
の板幅制御方法において、前記熱間連続圧延機群の第1
スタンドと第2スタンドの間で被圧延材の板幅を測定
し、測定した板幅と圧延スケジュールに基づき予め設定
された前記第1スタンド出側の板幅目標値との偏差を算
出し、該偏差に基づき竪型エッジャーの幅圧下量を修正
することを特徴とする熱間連続圧延における板幅制御方
法。
1. A method for controlling a width of a finishing rolling equipment provided with a vertical edger on an input side of a group of continuous hot rolling mills comprising a plurality of rolling stand rows, the method comprising:
Measuring the sheet width of the material to be rolled between the stand and the second stand, calculating a deviation between the measured sheet width and a sheet width target value on the first stand exit side preset based on a rolling schedule, A width control method for hot continuous rolling, wherein a width reduction amount of a vertical edger is corrected based on a deviation.
JP09114361A 1997-04-15 1997-04-15 Strip width control method in hot continuous rolling Expired - Fee Related JP3109067B2 (en)

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JP09114361A JP3109067B2 (en) 1997-04-15 1997-04-15 Strip width control method in hot continuous rolling

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JP09114361A JP3109067B2 (en) 1997-04-15 1997-04-15 Strip width control method in hot continuous rolling

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JP3109067B2 true JP3109067B2 (en) 2000-11-13

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Publication number Priority date Publication date Assignee Title
KR20020051653A (en) * 2000-12-23 2002-06-29 이구택 On line width control method in hot plate mill
CN102327925B (en) * 2011-07-28 2013-02-27 山西太钢不锈钢股份有限公司 Method for controlling aperture of hot rolling and reeling side guide by using actually-measured width of finished product
CN103170508B (en) * 2011-12-21 2014-11-26 上海梅山钢铁股份有限公司 Method for controlling width of hot rolling strip steel

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