JPH0910812A - Method for controlling coiling temperature of hot rolled steel sheet - Google Patents
Method for controlling coiling temperature of hot rolled steel sheetInfo
- Publication number
- JPH0910812A JPH0910812A JP7183633A JP18363395A JPH0910812A JP H0910812 A JPH0910812 A JP H0910812A JP 7183633 A JP7183633 A JP 7183633A JP 18363395 A JP18363395 A JP 18363395A JP H0910812 A JPH0910812 A JP H0910812A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- cooling
- water
- cooling water
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱間圧延された鋼板を
ランアウトテーブル上で冷却して巻き取り温度を制御す
る熱延鋼板の巻き取り温度制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a winding temperature of a hot-rolled steel sheet, in which a hot-rolled steel sheet is cooled on a runout table to control a winding temperature.
【０００２】[0002]
【従来の技術】熱間圧延では、仕上圧延機から出た高温
の熱延鋼板がコイラーに巻き取られて製品コイルとな
る。このとき、コイラーに巻き取られる熱延鋼板の温
度、すなわち巻き取り温度が鋼板の機械的特性に大きな
影響を及ぼす。そのため、仕上圧延機とコイラーとの間
に設けられたランアウトテーブル上で、鋼板が制御冷却
されてその巻き取り温度が制御される。2. Description of the Related Art In hot rolling, a hot rolled hot rolled steel sheet from a finish rolling mill is wound around a coiler to form a product coil. At this time, the temperature of the hot-rolled steel sheet wound around the coiler, that is, the winding temperature has a great influence on the mechanical properties of the steel sheet. Therefore, on the run-out table provided between the finish rolling mill and the coiler, the steel sheet is controlled and cooled, and the winding temperature thereof is controlled.
【０００３】図１は熱延鋼板の巻き取り温度制御を説明
するための装置構成図である。仕上圧延機２を出てラン
アウトテーブル上を進む鋼板１は、ランアウトテーブル
の上面側および下面側に設けられそれぞれが鋼板進行方
向において複数のバンクに分割された冷却ヘッダー３，
４からの注水により冷却されてコイラー５に巻き取られ
る。FIG. 1 is an apparatus configuration diagram for explaining a winding temperature control of a hot rolled steel sheet. The steel plate 1 that exits the finish rolling mill 2 and travels on the runout table is provided with cooling headers 3, which are provided on the upper surface side and the lower surface side of the runout table and are divided into a plurality of banks in the steel plate traveling direction.
It is cooled by pouring water from 4 and wound up on a coiler 5.
【０００４】このとき、冷却前の鋼板温度（圧延終了温
度）が仕上圧延機２の出側に設けた仕上出側温度計６ａ
により測定されると共に、冷却後の鋼板温度（巻き取り
温度）がコイラー５の入側に設けた巻き取り温度計６ｂ
により測定される。そして、所望の機械的特性を得るた
め、コントローラ８において鋼板１の巻き取り温度が予
測計算され、その計算値が目標値に一致するように冷却
ヘッダー３，４からの注水量がフィードフォワード制御
される。また、巻き取り温度の測定値と目標値の偏差に
基づいて、上記注水量がフィードバック制御により微調
整される。At this time, the temperature of the steel sheet before cooling (rolling end temperature) is a finishing outlet side thermometer 6a provided on the outlet side of the finishing rolling mill 2.
The temperature of the steel sheet after being cooled (winding temperature) is measured by the winding thermometer 6b provided on the inlet side of the coiler 5.
Is measured by Then, in order to obtain desired mechanical properties, the controller 8 predicts and calculates the coiling temperature of the steel sheet 1, and feed-forward controls the amount of water injected from the cooling headers 3 and 4 so that the calculated value matches the target value. It Further, the amount of water injection is finely adjusted by feedback control based on the deviation between the measured value of the winding temperature and the target value.
【０００５】更に、ランアウトテーブルでは鋼板の巻き
取り温度制御とは別に、ランアウトテーブルを構成する
多数のテーブルローラ９が、給水経路１０を経て各ロー
ラへ噴出される冷却水により強制冷却される。このロー
ラの冷却は、鋼板１の通過に伴いテーブルローラ９が高
温となって割れを生じるのを防止するためであり、圧延
開始前から圧延終了後まで継続されるのが通例である。Further, in the run-out table, a large number of table rollers 9 constituting the run-out table are forcibly cooled by the cooling water jetted to each roller via the water supply path 10 in addition to the control of the winding temperature of the steel plate. This cooling of the rollers is to prevent the table rollers 9 from becoming hot and cracking as the steel sheet 1 passes, and is usually continued from before rolling to after rolling.
【０００６】このような熱延鋼板の巻き取り温度制御で
は、巻き取り温度を出来るだけ高精度に制御することが
鋼板の品質精度を高めるために必要である。そのため
に、特開平２−７５４１０号公報では巻き取り温度を制
御入力とするフィードバック制御系において、巻き取り
温度の測定値から高周波成分を除いてその信号をコント
ローラに与えることにより、外乱によって生じる巻き取
り温度誤算を減少させることが提案されている。また、
特開昭５８−４７９２４号公報では温度降下の予測誤差
を減少させるために、計算と実績の水冷能力の比から各
制御単位の冷却能力を学習することが提案されている。In controlling the winding temperature of such a hot rolled steel sheet, it is necessary to control the winding temperature as accurately as possible in order to improve the quality accuracy of the steel sheet. Therefore, in JP-A-2-75410, in a feedback control system in which the winding temperature is used as a control input, a high-frequency component is removed from the measured value of the winding temperature and the signal is given to the controller, so that the winding caused by disturbance occurs. It has been proposed to reduce temperature miscalculations. Also,
JP-A-58-47924 proposes to learn the cooling capacity of each control unit from the ratio of the calculated and actual water cooling capacity in order to reduce the prediction error of the temperature drop.
【０００７】[0007]
【発明が解決しようとする課題】ところで、熱延鋼板の
巻き取り温度制御を行なうランアウトテーブルでは、前
述したように、その巻き取り温度制御とは別に、テーブ
ルローラの割れを防ぐために、各テーブルローラが冷却
水により強制的に冷却される。しかし、ローラ冷却水が
噴出されると、鋼板とテーブルロールとの間に滑りが発
生し、鋼板が進みにくくなる。そして従来のローラ冷却
では、図２に示すように、鋼板１の先端が到達する前か
らローラ冷却水１１が噴出されるために、特に板厚が２
ｍｍ以下の薄鋼板の場合は、その先端部の通板速度が低
下して、その形状が崩れ、通板性が著しく低下するとい
う問題がある。By the way, in the run-out table for controlling the winding temperature of the hot rolled steel sheet, as described above, in addition to the winding temperature control, in order to prevent the table rollers from cracking, each table roller is prevented. Is forcibly cooled by cooling water. However, when the roller cooling water is ejected, slippage occurs between the steel plate and the table roll, which makes it difficult for the steel plate to advance. In the conventional roller cooling, as shown in FIG. 2, since the roller cooling water 11 is jetted before the tip of the steel plate 1 reaches, the plate thickness is particularly 2
In the case of a thin steel sheet having a thickness of not more than mm, there is a problem that the sheet passing speed at the tip portion thereof is reduced, the shape thereof is collapsed, and the sheet passing property is significantly reduced.
【０００８】この問題を解決するために、本発明者らは
ローラ冷却水を供給する給水経路を鋼板進行方向におい
て複数のゾーンに分割し、鋼板の先端部が通過したゾー
ンから順にローラ冷却水の噴出を開始することを考え
た。In order to solve this problem, the present inventors divided the water supply path for supplying the roller cooling water into a plurality of zones in the traveling direction of the steel sheet, and the roller cooling water was sequentially passed from the zone where the tip of the steel sheet passed. I thought about starting a gush.
【０００９】しかしながら、このような噴出タイミング
制御を行なうと、鋼板の冷却途中にローラ冷却水の噴出
が開始される。そうすると、鋼板からテーブルローラへ
の抜熱量が増大し、鋼板温度が途中から４０℃程度低下
する。このような大きく急激な温度低下に対し、フィー
ドバック制御により巻き取り温度誤差を減少させる従来
の巻き取り温度制御は、応答遅れのため全く対応できな
い。また、冷却能力を学習する方法も巻き取り温度の実
績平均値を目標値に近づけることはできても、冷却途中
の温度低下を防止することはできず、むしろローラ冷却
水の噴出状況によって学習値が外乱を受ける。従って、
この方法も又、ローラ冷却水の噴出タイミング制御によ
る鋼板温度低下に対しては無力である。However, when such ejection timing control is performed, ejection of the roller cooling water is started during cooling of the steel sheet. Then, the amount of heat removed from the steel plate to the table roller increases, and the steel plate temperature decreases about 40 ° C. from the middle. The conventional winding temperature control for reducing the winding temperature error by the feedback control cannot deal with such a large and rapid temperature decrease because of the response delay. Also, the method of learning the cooling capacity can make the average value of the winding temperature close to the target value, but cannot prevent the temperature drop during cooling, rather the learning value depends on the spouting state of the roller cooling water. Receives a disturbance. Therefore,
This method is also useless for lowering the temperature of the steel sheet by controlling the timing of jetting the roller cooling water.
【００１０】すなわち、ローラ冷却水の噴出タイミング
を制御することより、鋼板の通板性を改善することはで
きても、代わりに鋼板の巻き取り温度精度が長手方向に
おいて著しく低下するという問題が新たに生じる。That is, although it is possible to improve the threadability of the steel sheet by controlling the ejection timing of the roller cooling water, there is a new problem that the accuracy of the coiling temperature of the steel sheet is significantly lowered in the longitudinal direction. Occurs in
【００１１】本発明の目的は、ローラ冷却水の噴出に伴
う通板性の低下を防ぎ、合わせて鋼板の全長にわたって
巻き取り温度を精度よく制御することができる熱延鋼板
の巻き取り温度制御方法を提供することにある。It is an object of the present invention to prevent the deterioration of the sheet passing property due to the jetting of the cooling water for the rollers, and also to control the winding temperature with high precision over the entire length of the steel sheet. To provide.
【００１２】[0012]
【課題を解決するための手段】本発明の熱延鋼板の巻き
取り温度制御方法は、熱間圧延された鋼板をランアウト
テーブル上で冷却して巻き取り温度を制御する方法にお
いて、ランアウトテーブルを構成する多数のテーブルロ
ーラを冷却する冷却水の給水経路を、鋼板進行方向にお
いて独立制御が可能な複数のゾーンに分割して、鋼板の
先端部が通過したゾーンから順にローラ冷却水の噴出を
開始し、且つ、予測計算した鋼板の巻き取り温度が目標
値に一致するように冷却ヘッダーからの注水量をフィー
ドフォワード制御する際に、ローラ冷却水の噴出による
鋼板温度の変化量を計算し、その変化を打ち消すべく前
記注水量を補正するものである。A method for controlling a winding temperature of a hot-rolled steel sheet according to the present invention is a method for controlling a winding temperature by cooling a hot-rolled steel sheet on a run-out table, which comprises a run-out table. The water supply path for the cooling water that cools a large number of table rollers is divided into multiple zones that can be controlled independently in the direction in which the steel sheet travels, and the spouting of the roller cooling water is started sequentially from the zone where the tip of the steel sheet has passed. In addition, when performing feedforward control of the water injection amount from the cooling header so that the predicted calculated coiling temperature of the steel plate matches the target value, the change amount of the steel plate temperature due to the jet of the roller cooling water is calculated and the change is calculated. The amount of water injection is corrected to cancel the above.
【００１３】[0013]
【作用】本発明の熱延鋼板の巻き取り温度制御方法にお
いては、ローラ冷却水の給水経路を鋼板進行方向に複数
分割し、鋼板の先端部が通過してからローラ冷却水を噴
出するので、薄鋼板の場合も先端部の進行速度低下に伴
う形状崩れが防止され、通板状態を良好に保ちながらテ
ーブルローラを冷却することができる。また、鋼板の冷
却開始後にローラ冷却水を噴出し始めるにもかかわら
ず、その噴出による温度変化を予め見込んだフィードフ
ォワード制御が行なわれるので、ローラ冷却水の噴出に
よる巻き取り温度の変化が防止される。In the method for controlling the winding temperature of the hot rolled steel sheet according to the present invention, the water supply path for the roller cooling water is divided into a plurality of parts in the traveling direction of the steel sheet, and the roller cooling water is jetted after the tip of the steel sheet has passed. Even in the case of a thin steel plate, the collapse of the shape due to the decrease in the traveling speed of the tip portion is prevented, and the table roller can be cooled while maintaining a good passing state. Further, although the roller cooling water starts to be ejected after the cooling of the steel plate is started, the feedforward control is performed in consideration of the temperature change caused by the ejection, so that the change of the winding temperature due to the ejection of the roller cooling water is prevented. It
【００１４】[0014]
【実施例】以下に本発明の実施例を図面に基づいて説明
する。図３に本発明を実施するのに適した装置構成を示
す。Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows an apparatus configuration suitable for implementing the present invention.
【００１５】仕上圧延機２の出側に設けられたランアウ
トテーブルは、上流部と下流部に２分割され、下流部と
下流部の間には近接コイラー５ａが、下流部の下流側に
は遠方コイラー５ｂがそれぞれ設けられている。また、
仕上圧延機２の出側には仕上出口温度計６ａが、近接コ
イラー５ａおよび遠方コイラー５ａの入側には、中間温
度計６ｃおよび巻き取り温度計６ｂがそれぞれ設けられ
ている。The run-out table provided on the exit side of the finish rolling mill 2 is divided into an upstream part and a downstream part, a proximity coiler 5a is provided between the downstream part and the downstream part, and a distant part is provided downstream of the downstream part. The coilers 5b are provided respectively. Also,
A finish outlet thermometer 6a is provided on the exit side of the finish rolling mill 2, and an intermediate thermometer 6c and a take-up thermometer 6b are provided on the entrance sides of the near coiler 5a and the distant coiler 5a, respectively.
【００１６】ランアウトテーブルの上面側に設けられた
冷却ヘッダー３および下面側に設けられた冷却ヘッダー
４は、鋼板１の進行方向において１４個のバンクに分割
されている。また、ランアウトテーブルを構成するテー
ブルローラ９は冷却水により強制冷却され、その冷却水
を供給する給水経路１０は鋼板１の進行方向において３
つのゾーンに分割されている。第１ゾーンは近接コイラ
ー５ａの上流側に位置し、第２ゾーンおよび第３ゾーン
は近接コイラー５ａと遠方コイラー５ｂの間に位置す
る。各ゾーンにおいてはバルブ１２ａ，１２ｂ，１２ｃ
により独立にローラ冷却水の噴出がオンオフされる。The cooling header 3 provided on the upper surface side and the cooling header 4 provided on the lower surface side of the runout table are divided into 14 banks in the traveling direction of the steel plate 1. Further, the table roller 9 constituting the run-out table is forcibly cooled by the cooling water, and the water supply path 10 for supplying the cooling water is 3 in the traveling direction of the steel plate 1.
It is divided into two zones. The first zone is located upstream of the near coiler 5a, and the second and third zones are located between the near coiler 5a and the far coiler 5b. Valves 12a, 12b, 12c in each zone
Thus, the jetting of the roller cooling water is turned on / off independently.
【００１７】冷却ヘッダー３，４からの注水量を制御す
るコントローラ８は、仕上出口温度計６ａから圧延仕上
温度の実績値を取り込み、仕上圧延機２から鋼板速度の
実績値を取り込む。これらを含む種々の実績値を用い
て、コントローラ８は次の処理を行なう。鋼板１の現在
温度を計算する。鋼板現在温度と鋼板速度とランアウト
テーブルでの鋼板温度降下量（予測計算値）とから巻き
取り温度を予測する。その予測値が目標値となるように
冷却ヘッダー３，４のバルブ開閉パターンを修正する。The controller 8 for controlling the amount of water injected from the cooling headers 3 and 4 takes in the actual value of the rolling finish temperature from the finishing outlet thermometer 6a and the actual value of the steel plate speed from the finishing rolling mill 2. The controller 8 performs the following processing by using various actual values including these. Calculate the current temperature of the steel plate 1. The coiling temperature is predicted from the steel plate current temperature, the steel plate speed, and the steel plate temperature drop amount (predicted calculation value) in the runout table. The valve opening / closing pattern of the cooling headers 3 and 4 is corrected so that the predicted value becomes the target value.
【００１８】このような装置構成を用いて、本実施例の
巻き取り温度制御は次のように実行される。図４にロー
ル冷却水の噴出タイミングを示し、図５に鋼板長手方向
の巻き取り温度分布を示す。The winding temperature control of this embodiment is executed as follows by using such a device configuration. FIG. 4 shows the timing of jetting the roll cooling water, and FIG. 5 shows the winding temperature distribution in the longitudinal direction of the steel sheet.
【００１９】給水経路１０のバルブ１２ａ，１２ｂ，１
２ｃを全て閉じた状態で、冷却ヘッダー３，４から注水
を行ないながら、仕上圧延機２から鋼板１が進出する。
鋼板１の先端が中間温度計６ｃを通過した後、ｔ１秒後
にバルブ１２ａが開かれ、第１ゾーンにおいてロール冷
却水の噴出が始まる。鋼板１の先端が遠方コイラー５ｂ
に噛み込まれた後、ｔ２秒後、ｔ３（＞ｔ２）秒後にバ
ルブ１２ｂ，１２ｃがそれぞれ開放されることにより、
第２ゾーン、第３ゾーンにおいて順番にロール冷却水の
噴出が開始される。Valves 12a, 12b, 1 of the water supply path 10
The steel plate 1 advances from the finish rolling mill 2 while pouring water from the cooling headers 3 and 4 with all 2c closed.
After the tip of the steel plate 1 passes the intermediate thermometer 6c, the valve 12a is opened t1 seconds later, and the jetting of the roll cooling water is started in the first zone. The tip of the steel plate 1 is a distant coiler 5b
After being bitten by, the valves 12b and 12c are opened after t2 seconds and t3 (> t2) seconds, respectively.
Ejection of the roll cooling water is sequentially started in the second zone and the third zone.
【００２０】このように、鋼板１の先端部が通過した後
にロール冷却水の噴出を開始することにより、先端部が
テーブルローラ９によりスムーズに搬送され、先端部の
形状崩れによる通板性低下が防止される。このとき、鋼
板１の先端部は第１〜３ゾーンのいずれにおいてもロー
ル冷却水の噴出による温度低下を生じない。ロール冷却
水の噴出が始まった後に通過する部分から、その噴出に
よる温度低下を生じる。そのため、冷却ヘッダー３，４
から従来通りの注水が行なわれる場合は、図５に破線で
示すように、鋼板の巻き取り温度が先端部を除き目標値
より低くなる。そこで本制御では、この鋼板の温度降下
を防止するため、冷却ヘッダー３，４からの注水量を補
正する。この補正の詳細は次の通りである。As described above, by starting the ejection of the roll cooling water after the leading end of the steel plate 1 has passed, the leading end is smoothly conveyed by the table roller 9, and the sheet passing property is deteriorated due to the shape collapse of the leading end. To be prevented. At this time, the tip of the steel plate 1 does not drop in temperature due to the jet of roll cooling water in any of the first to third zones. The temperature drop due to the jetting of the roll cooling water is generated from the portion that passes after the jetting of the roll cooling water starts. Therefore, the cooling header 3,4
Therefore, when the conventional water injection is performed, the winding temperature of the steel sheet becomes lower than the target value except for the tip portion, as shown by the broken line in FIG. Therefore, in this control, the amount of water injected from the cooling headers 3 and 4 is corrected in order to prevent the temperature drop of the steel plate. The details of this correction are as follows.
【００２１】鋼板の巻き取り温度を予測計算するための
熱伝達方程式は数式１により与えられ、鋼板表面の境界
条件は数式２により与えられる。The heat transfer equation for predicting and calculating the coiling temperature of the steel sheet is given by Equation 1, and the boundary condition of the steel sheet surface is given by Equation 2.
【００２２】[0022]
【数１】 (Equation 1)
【００２３】[0023]
【数２】 (Equation 2)
【００２４】上面、下面の熱流速はｑt 、ｑb は次式に
より与えられる。 ｑt ＝ｑwt＋ｑRt＋ｑAt ｑb ＝ｑwb＋ｑRb＋ｑr ｑwt、ｑwb：上面、下面の水冷の熱流速 ｑRt、ｑRb：上面、下面の輻射の熱流速 ｑAt、ｑAb：上面、下面の対流の熱流速 ｑr ：下面のテーブルローラへの熱流速The heat velocities on the upper and lower surfaces are q t and q b are given by the following equations. q t = q wt + q Rt + q At q b = q wb + q Rb + q r q wt, q wb: top, bottom surface of the water cooling of the heat flux q Rt, q Rb: top, heat flux of the lower surface of the radiation q At, q Ab : Heat flow velocity of convection on the upper and lower surfaces q r : Heat flow velocity to the table roller on the lower surface
【００２５】そして本制御では下面のテーブルローラへ
の熱流速ｑr を次のように求める。 ｑr ＝Ｆｈr （θS −θW ） ｈr ：テーブルローラ冷却水の熱伝達率〔Ｗ／ｍ2 ℃〕 θS ：鋼板表面温度〔℃〕 θW ：テーブルローラ冷却
水温度〔℃〕 Ｆ ：１ テーブルローラ冷却水噴出時 ０ テーブルローラ冷却水停止時Then, in this control, the heat flow rate q r to the table roller on the lower surface is obtained as follows. q r = Fh r (θ S -θ W) h r: heat transfer coefficient table roller cooling water [W / m 2 ° C.] theta S: steel sheet surface temperature [° C.] theta W: table roller cooling water temperature [° C.] F: 1 When the table roller cooling water is ejected 0 When the table roller cooling water is stopped
【００２６】すなわち本制御では、境界条件における下
面の熱流速ｑb を求めるにあたり、ローラ冷却水の停止
時にテーブルローラへの熱流速ｑr を考慮せず、ローラ
冷却水の噴出時にのみテーブルローラへの熱流速ｑr を
考慮する。[0026] That is, in this control, when determining the heat flux q b of the lower surface in boundary conditions, without considering the heat flux q r to the table rollers when the roller cooling water stopped, the only table rollers when ejection rollers coolant Consider the heat flux q r of
【００２７】このように、本制御ではローラ冷却水の状
態により下面の熱流速を変化させて、上記熱伝導方程式
を解くことにより、鋼板の巻き取り温度を予測計算す
る。そして、巻き取り温度の予測計算値と目標値とか
ら、必要な上面、下面の冷却水量を計算し、冷却ヘッダ
ー３，４からの注水量をフィードフォワード制御する。
これにより、ローラ冷却水の噴出と同時に、その噴出に
よる鋼板の温度低下を打ち消すように、冷却ヘッダー
３，４からの注水量が補正される。その結果、図５に実
線で示すように、鋼板の巻き取り温度が全長にわたって
目標値に精度よく制御される。As described above, in the present control, the coiling temperature of the steel sheet is predicted and calculated by changing the heat flow velocity on the lower surface depending on the state of the roller cooling water and solving the above heat conduction equation. Then, the required amount of cooling water on the upper and lower surfaces is calculated from the predicted calculation value of the winding temperature and the target value, and the amount of water injected from the cooling headers 3 and 4 is feedforward controlled.
As a result, at the same time as the roller cooling water is jetted, the amount of water injected from the cooling headers 3 and 4 is corrected so as to cancel the temperature drop of the steel sheet due to the jet. As a result, as shown by the solid line in FIG. 5, the winding temperature of the steel sheet is accurately controlled to the target value over the entire length.
【００２８】[0028]
【発明の効果】以上に説明した通り、本発明の熱延鋼板
の巻き取り温度制御方法は、鋼板の先端部が通過してか
らロール冷却水の噴出を開始するので、先端部の形状崩
れが防止され、通板性を良好に保ちながらテーブルロー
ラを冷却できる。また、冷却ヘッダーからの注水量をフ
ィードフォワード制御する際にその注水量をロール冷却
水の噴出状態に応じて補正するので、その噴出による巻
き取り温度制御への外乱が除去され、鋼板全長にわたっ
て高精度な巻き取り温度制御を実現できる。As described above, in the method for controlling the winding temperature of the hot-rolled steel sheet of the present invention, the ejection of the roll cooling water is started after the tip of the steel sheet passes, so that the shape of the tip is not deformed. It is possible to cool the table roller while maintaining good sheet passing property. Further, when feed-forward controlling the water injection amount from the cooling header, the water injection amount is corrected according to the jetting state of the roll cooling water, so that the disturbance to the winding temperature control due to the jetting is removed, and the high temperature is achieved over the entire length of the steel sheet. Accurate winding temperature control can be realized.
【図１】熱延鋼板の巻き取り温度制御を説明するための
模式図である。FIG. 1 is a schematic diagram for explaining a winding temperature control of a hot rolled steel sheet.
【図２】ローラ冷却水の噴出による通板性の低下を説明
するための模式図である。FIG. 2 is a schematic diagram for explaining a reduction in sheet passing property due to ejection of roller cooling water.
【図３】本発明の巻き取り温度制御方法を実施するのに
適した装置構成の模式図である。FIG. 3 is a schematic diagram of an apparatus configuration suitable for implementing the winding temperature control method of the present invention.
【図４】ロール冷却水の噴出タイミングを示すタイムチ
ャートである。FIG. 4 is a time chart showing the ejection timing of roll cooling water.
【図５】ロール冷却水の噴出に応じてヘッダー水量を補
正した場合の効果を示す巻き取り温度分布図である。FIG. 5 is a winding temperature distribution diagram showing an effect when the header water amount is corrected according to the jet of roll cooling water.
１ 鋼板 ２ 仕上圧延機 ３，４ 冷却ヘッダー ５ コイラー ６ 温度計 ８ コントローラ ９ テーブルローラ １０ 給水経路 １２ バルブ 1 Steel Plate 2 Finishing Rolling Machine 3, 4 Cooling Header 5 Coiler 6 Thermometer 8 Controller 9 Table Roller 10 Water Supply Path 12 Valve
Claims (1)
ル上で冷却して巻き取り温度を制御する方法において、 ランアウトテーブルを構成する多数のテーブルローラを
冷却する冷却水の給水経路を、鋼板進行方向において独
立制御が可能な複数のゾーンに分割して、鋼板の先端部
が通過したゾーンから順にローラ冷却水の噴出を開始
し、 且つ、予測計算した鋼板の巻き取り温度が目標値に一致
するように冷却ヘッダーからの注水量をフィードフォワ
ード制御する際に、ローラ冷却水の噴出による鋼板温度
の変化量を計算し、その変化を打ち消すべく前記注水量
を補正することを特徴とする熱延鋼板の巻き取り温度制
御方法。1. A method for cooling a hot-rolled steel sheet on a run-out table to control a winding temperature, wherein a water supply path for cooling water for cooling a large number of table rollers constituting the run-out table is provided in a steel sheet traveling direction. In this case, the roller cooling water is spouted sequentially from the zone where the tip of the steel plate passes, and the predicted calculated coiling temperature of the steel plate matches the target value. When performing feed-forward control of the water injection amount from the cooling header, the change amount of the steel plate temperature due to the jet of the roller cooling water is calculated, and the water injection amount is corrected to cancel the change. Winding temperature control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7183633A JP2988330B2 (en) | 1995-06-26 | 1995-06-26 | Control method of winding temperature of hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7183633A JP2988330B2 (en) | 1995-06-26 | 1995-06-26 | Control method of winding temperature of hot rolled steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0910812A true JPH0910812A (en) | 1997-01-14 |
| JP2988330B2 JP2988330B2 (en) | 1999-12-13 |
Family
ID=16139197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7183633A Expired - Lifetime JP2988330B2 (en) | 1995-06-26 | 1995-06-26 | Control method of winding temperature of hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988330B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008238274A (en) * | 2007-02-28 | 2008-10-09 | Jfe Steel Kk | Method of judging quality of hot-rolled metal band using near infrared camera in hot rolling and method of manufacturing hot-rolled metal band |
| JP2011083792A (en) * | 2009-10-15 | 2011-04-28 | Nippon Steel Corp | Method of cooling steel plate |
| JP2013215770A (en) * | 2012-04-09 | 2013-10-24 | Nippon Steel & Sumitomo Metal Corp | Method for cooling hot-rolled steel sheet and method for manufacturing the same |
| JP2015093301A (en) * | 2013-11-13 | 2015-05-18 | 株式会社日立製作所 | Hot rolling control device and hot rolling control method |
| CN111215456A (en) * | 2018-11-23 | 2020-06-02 | 宝山钢铁股份有限公司 | Method for controlling threading stability of strip steel in hot-rolling laminar cooling area |
Families Citing this family (1)
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|---|---|---|---|---|
| CN102430594B (en) * | 2011-09-21 | 2013-07-17 | 河北省首钢迁安钢铁有限责任公司 | Method for eliminating loop rise of thin gauge strip on layer-cold roller way |
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1995
- 1995-06-26 JP JP7183633A patent/JP2988330B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008238274A (en) * | 2007-02-28 | 2008-10-09 | Jfe Steel Kk | Method of judging quality of hot-rolled metal band using near infrared camera in hot rolling and method of manufacturing hot-rolled metal band |
| JP2011083792A (en) * | 2009-10-15 | 2011-04-28 | Nippon Steel Corp | Method of cooling steel plate |
| JP2013215770A (en) * | 2012-04-09 | 2013-10-24 | Nippon Steel & Sumitomo Metal Corp | Method for cooling hot-rolled steel sheet and method for manufacturing the same |
| JP2015093301A (en) * | 2013-11-13 | 2015-05-18 | 株式会社日立製作所 | Hot rolling control device and hot rolling control method |
| CN104624666A (en) * | 2013-11-13 | 2015-05-20 | 株式会社日立制作所 | Hot rolling device and hot rolling control method |
| CN111215456A (en) * | 2018-11-23 | 2020-06-02 | 宝山钢铁股份有限公司 | Method for controlling threading stability of strip steel in hot-rolling laminar cooling area |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2988330B2 (en) | 1999-12-13 |
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