JPH0775816A - Method for automatically controlling water injection between stands - Google Patents
Method for automatically controlling water injection between standsInfo
- Publication number
- JPH0775816A JPH0775816A JP5242155A JP24215593A JPH0775816A JP H0775816 A JPH0775816 A JP H0775816A JP 5242155 A JP5242155 A JP 5242155A JP 24215593 A JP24215593 A JP 24215593A JP H0775816 A JPH0775816 A JP H0775816A
- Authority
- JP
- Japan
- Prior art keywords
- water injection
- temperature
- stands
- rolling mill
- finishing
- 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.)
- Withdrawn
Links
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、仕上圧延工程における
スタンド間注水を自動化するための自動制御方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic control method for automating water injection between stands in a finish rolling process.
【０００２】[0002]
【従来の技術】熱間圧延設備は粗圧延機と仕上圧延機を
備え、粗圧延機で粗圧延を行った後、仕上圧延機により
規定の寸法および形状になるように仕上圧延が行われ
る、仕上圧延機で規定の寸法および形状にするために
は、被圧延材を規定の温度にしながら安定な圧延を行う
ことが望まれる。2. Description of the Related Art A hot rolling facility is provided with a rough rolling mill and a finish rolling mill. After rough rolling is performed by the rough rolling mill, finish rolling is performed by the finish rolling mill so as to have prescribed dimensions and shapes. In order to obtain the specified size and shape in the finish rolling mill, it is desired to perform stable rolling while maintaining the material to be rolled at a specified temperature.
【０００３】被圧延材を規定の温度にするため、仕上圧
延機のスタンド間に部分注水を行いスタンド間注水設備
が設けられ、仕上圧延機の出側の温度制御を行ってい
る。バー内全長の仕上出側温度は、スケールの発生の低
減、ロールの肌荒れの低減等を図る理由から、一定の公
差内に収める必要があるほか、均一な温度であることが
望まれる。In order to bring the material to be rolled to a specified temperature, partial water injection is performed between the stands of the finish rolling mill to provide an inter-stand water injection facility to control the temperature on the outlet side of the finish rolling mill. The finish outlet temperature of the entire length in the bar needs to be kept within a certain tolerance for the purpose of reducing the generation of scale and the roughness of the roll, and is preferably a uniform temperature.
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記した注水
制御は、従来、手動により行われており、熟練度や個人
差により仕上出側温度に対して必要以上に注水したり、
逆に注水不足になるケースは避けられず、製品の品質を
安定化することは困難である。また、適正に行おうとす
ると、オペレータの負担が増えるという問題が生じる。However, the above-mentioned water injection control is conventionally performed manually, and water is injected more than necessary for the finishing outlet temperature due to skill and individual differences.
On the contrary, it is unavoidable that water supply becomes insufficient, and it is difficult to stabilize the product quality. In addition, if it is attempted appropriately, there is a problem that the burden on the operator increases.
【０００５】注水制御の自動化も考えられてはいるが、
操業プロセスが複雑で未解明な部分が多く、制御方法や
パラメータ設定方法等が操業の実態とミスマッチしてい
る等が原因で、完璧な自動化を達成するには至っておら
ず、スキッド等に対する対策までを考慮した制御は実現
していなかった。Although automation of water injection control has been considered,
Since the operation process is complicated and there are many unexplained parts, and the control method and parameter setting method etc. do not match the actual operation condition, perfect automation has not been achieved, and even measures against skid etc. Control taking into consideration was not realized.
【０００６】そこで、本発明の目的は、注水制御の自動
化を図ることのできるスタンド間注水の自動制御方法を
提供することにある。[0006] Therefore, an object of the present invention is to provide an automatic water injection control method between stands that can automate the water injection control.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに、この発明は、仕上圧延機を通板する鋼板に対し前
記仕上圧延機のスタンド間でスタンド間注水設備により
部分注水を行って圧延機出側の仕上温度を目標値にする
熱間圧延において、予め設定した温度モデルおよび各部
位毎の実績パラメータに基づいて前記鋼板の仕上工程内
における温度変化を算出し、この結果に基づいて注水制
御を行うようにしている。In order to achieve the above-mentioned object, the present invention is to carry out partial water injection between the stands of the finish rolling machine by means of a water supply system between the stands of the finish rolling machine. In hot rolling to set the finishing temperature on the rolling mill exit side to the target value, the temperature change in the finishing process of the steel sheet is calculated based on the preset temperature model and the actual parameters for each part, and based on this result. Water injection is controlled.
【０００８】[0008]
【作用】上記した手段によれば、鋼板の特定の部分がど
のような実績（滞在時間、速度、荷重、注水の有無等）
のもとに鋼板温度が数値で示されるかを算出すると共
に、現在の圧延状態でどの位の温度効果を受けるかを温
度モデルを基に算出し、両者を比較して注水の有無を判
定する。従って、注水制御の完全自動化が可能になると
共に、スキッド等を生じさせることがない。According to the above-mentioned means, the actual results of the specific portion of the steel sheet (staying time, speed, load, presence or absence of water injection, etc.)
Based on the temperature model, the steel plate temperature is calculated numerically, and how much temperature effect is received in the current rolling state is calculated based on the temperature model, and the two are compared to determine the presence or absence of water injection. . Therefore, the water injection control can be fully automated, and skids and the like will not occur.
【０００９】[0009]
【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は本発明によるスタンド間注水の自動
制御方法の処理例を示すフローチャートであり、図２は
熱間圧延設備の一例の概略構成を示す構成図である。FIG. 1 is a flow chart showing a processing example of an automatic control method for water injection between stands according to the present invention, and FIG. 2 is a schematic view showing an example of a hot rolling equipment.
【００１１】図２に示すように、粗圧延機１の後段に
は、ホットランテーブル（Ｈテーブル）２、クロップシ
ャー（Ｃ／Ｓ）３、エッジヒータ４、フィニッシャース
ケールブレーカ（ＦＳＢ）５、仕上圧延機６が順次配設
されさらに仕上圧延機６に隣接させてスタンド間注水設
備７が設備されている。As shown in FIG. 2, after the rough rolling mill 1, a hot run table (H table) 2, a crop shear (C / S) 3, an edge heater 4, a finisher scale breaker (FSB) 5, and finish rolling. Machines 6 are sequentially arranged, and an inter-stand water supply facility 7 is installed adjacent to the finish rolling machine 6.
【００１２】また、粗圧延機１の出側には、この位置に
おける鋼板の温度を測定するための温度計８が設置さ
れ、ホットランテーブル２とクロップシャー３の間には
仕上圧延機６に入る鋼板の温度を測定するための温度計
９が設置されている。また、仕上圧延機６の出側には、
仕上圧延機６を出る鋼板の温度、板幅、厚み等を測定す
るセンサ群１０が設置されている。さらに、スタンド間
注水設備７を制御するために、制御装置１１が設けられ
ている。A thermometer 8 for measuring the temperature of the steel sheet at this position is installed on the exit side of the rough rolling mill 1, and enters the finishing rolling mill 6 between the hot run table 2 and the crop shear 3. A thermometer 9 for measuring the temperature of the steel sheet is installed. Further, on the exit side of the finish rolling mill 6,
A sensor group 10 for measuring the temperature, plate width, thickness, etc. of the steel plate that exits the finish rolling mill 6 is installed. Further, a control device 11 is provided to control the inter-stand water injection facility 7.
【００１３】粗圧延機１で製造された粗バーはホットラ
ンテーブル２によって仕上圧延機６へ搬送されるが、そ
の過程でクロップシャー３の鋼板のボトムのクロップが
除去されて、ついで、エッジヒータ４で鋼板のエッジが
加熱される。また、ＦＳＢ５で鋼板表面のスケールが除
去された後、鋼板は仕上圧延機６へ搬入される。この仕
上圧延機６において、鋼板の温度を所定の温度に下げる
ため、スタンド間注水設備７のノズルから注水が行われ
る。The rough bar produced by the rough rolling mill 1 is conveyed to the finishing rolling mill 6 by the hot run table 2. In the process, the bottom crop of the steel plate of the crop shear 3 is removed, and then the edge heater 4 is used. The edge of the steel plate is heated by. After the scale on the surface of the steel sheet has been removed by the FSB 5, the steel sheet is carried into the finish rolling mill 6. In this finish rolling mill 6, water is injected from the nozzles of the inter-stand water injection equipment 7 in order to reduce the temperature of the steel plate to a predetermined temperature.
【００１４】本発明による注水制御（図２の制御装置１
１によって実行される）について、図１を参照して説明
する。なお、図中の“Ｓ”はステップを表している。Water injection control according to the present invention (control device 1 in FIG. 2
1)) will be described with reference to FIG. In addition, "S" in the figure represents a step.
【００１５】まず、プロセスコンピュータから目標出側
温度、目標出側板厚、予測圧延荷重、塑性係数および鋼
種係数等が与えられる（Ｓ１０１）と共に、ホットラン
テーブル滞在時間、ミル速度、圧延荷重および注水の有
無等の実績値（Ｓ１０２）等が取り込まれ、これらに基
づいて温度降下予測モデルを用いて温度降下予測値ΔＴ
の算出が行われる（Ｓ１０３）。この算出は、通板中１
秒毎に行われる。また、モデル計算に用いる各種パラメ
ータは板がスタンドに噛み込む前は設定量を用い、通板
中はスキャンタイム毎にシーケンサに送られて来る実績
値を用いる。First, the process computer gives the target outlet temperature, the target outlet plate thickness, the predicted rolling load, the plasticity coefficient and the steel grade coefficient, etc. (S101), and at the same time, the hot run table residence time, the mill speed, the rolling load and the presence or absence of water injection. The actual values (S102) and so on are taken in, and the temperature drop prediction value ΔT is obtained by using the temperature drop prediction model based on them.
Is calculated (S103). This calculation is 1
It is done every second. Further, various parameters used for model calculation use set values before the plate is bitten into the stand, and actual values sent to the sequencer at each scan time during plate passing.
【００１６】ステップ１０３における温度降下予測モデ
ルは、温度計８の設定位置からセンサ群１０の設定位置
までの温度降下予測を行うもので、ＦＳＵ（フィニッシ
ャーセットアップ）に用いられている温度モデルを基に
作成でき、時々刻々に変化するパラメータを用いて行う
ことで高精度の演算が可能である。The temperature drop prediction model in step 103 is for predicting the temperature drop from the set position of the thermometer 8 to the set position of the sensor group 10, and is based on the temperature model used in the FSU (finisher setup). It can be created, and highly accurate calculation is possible by using parameters that change from moment to moment.
【００１７】温度降下予測モデルは、図３に示す式で与
えられる。ここではｊ番目のスタンドと（ｊ＋１）番面
のスタンドとの間における算出式を示している。また、
図中、ΔＴは温度降下予測であり、ΔＴＨはホットラン
テーブル２で自然に空冷される温度値、ΔＴＦＳはＦＳ
Ｂ５における空冷温度値、ΔＴ１はスタンド内温度変化
値、ΔＴ０はスタンド間温度変化値を各々示している。
そして、第１項から第３項までは履歴温度降下分に該当
し、第４項は予測温度降下分に該当する。The temperature drop prediction model is given by the equation shown in FIG. Here, a calculation formula between the j-th stand and the (j + 1) th stand is shown. Also,
In the figure, ΔT is a temperature drop prediction, ΔTH is a temperature value at which the hot run table 2 naturally cools, and ΔTFS is FS.
The air-cooling temperature value at B5, ΔT1 is the temperature change value in the stand, and ΔT0 is the temperature change value between the stands.
The first to third terms correspond to the history temperature drop, and the fourth term corresponds to the predicted temperature drop.
【００１８】ついで、粗圧延機１の出側の板温度が温度
計８によって測定され（Ｓ１０４）、この測定値と目標
仕上温度（プロセスコンピュータから与えられる）との
差が温度降下目標値ΔＴ１として求められる（Ｓ１０
５）。求められた温度降下目標値ΔＴ１に対し、ステッ
プ１０３で求めた温度降下予測値ΔＴが減算され、Δｅ
が求められる（Ｓ１０６）。このΔｅに対し、モニタ補
正量ΔＴｍを減算することで注水可否の判定結果が得ら
れる（Ｓ１０７）。Next, the plate temperature on the outlet side of the rough rolling mill 1 is measured by the thermometer 8 (S104), and the difference between this measured value and the target finishing temperature (given from the process computer) is taken as the temperature drop target value ΔT1. Required (S10
5). The temperature drop predicted value ΔT obtained in step 103 is subtracted from the obtained temperature drop target value ΔT1, and Δe
Is required (S106). By subtracting the monitor correction amount ΔTm from this Δe, it is possible to obtain the determination result as to whether or not water injection is possible (S107).
【００１９】ここで、モニタ補正量ΔＴｍを求める理由
は、ステップ１０３で用いるモデルから外れたときに備
えて計算された値である、ステップ１０７の演算結果に
対して、その値が０を越えていれば注水開始の指令を出
し（Ｓ１０９）、そうでなければ注水不可の指令を出す
（Ｓ１１０）。この処理の後、鋼板が一定長さ分だけ搬
送されたか否かが判定され（Ｓ１１１）、一定長の搬送
が確認されれば、処理はステップ１０３へ戻され、以降
の処理が上記したように繰り返し実行される。図４は本
発明による注水制御の降下を示す説明図であり、（ａ）
に示すように粗圧延機１の出側温度が変化している場
合、その温度が目標値よりも高い場合には（ｂ）のよう
に注水を温度に応じて増量し、逆に目標値よりも低くな
るときには注水を減量する。この制御により、（ｃ）に
示すごとく、仕上出側温度は目標値に対し許容限度（こ
の例では８８０℃±２０℃）内に収めることができる。
また、スキッドマークを打ち消すことが可能になる。Here, the reason for obtaining the monitor correction amount ΔTm is a value calculated in case of deviation from the model used in step 103. The value exceeds 0 with respect to the calculation result of step 107. If so, a command to start water injection is issued (S109), and if not, a command to prohibit water injection is issued (S110). After this processing, it is determined whether or not the steel sheet has been transported by a certain length (S111), and if the transportation of the certain length is confirmed, the processing is returned to step 103, and the subsequent processing is performed as described above. It is executed repeatedly. FIG. 4 is an explanatory diagram showing a drop in water injection control according to the present invention, (a)
When the outlet temperature of the rough rolling mill 1 is changing as shown in (4), if the temperature is higher than the target value, the amount of water injection is increased according to the temperature as shown in (b), and conversely from the target value. If it becomes too low, reduce water injection. By this control, as shown in (c), the finish temperature can be kept within the allowable limit (880 ° C. ± 20 ° C. in this example) with respect to the target value.
In addition, it becomes possible to cancel the skid mark.
【００２０】[0020]
【発明の効果】以上説明したとおり、この発明は仕上圧
延機を通板する鋼板に対し前記仕上圧延機のスタンド間
でスタンド間注水設備により部分注水を行って圧延機出
側の仕上温度を目標値にする熱間圧延において、予め設
定した温度モデルおよび各部位ごとの実績パラメータに
基づいて前記鋼板の上げ工程内における温度変化を算出
し、この結果に基づいて注水制御を行うようにしたの
で、注水制御の完全自動化が可能になると共に、スキッ
ド等を生じさせることがない。As described above, according to the present invention, the steel sheet which is passed through the finish rolling mill is partially water-filled between the stands of the finish rolling mill by the water supply system between the stands so that the finish temperature on the delivery side of the rolling mill is targeted. In the hot rolling to the value, the temperature change in the raising process of the steel sheet is calculated based on the preset temperature model and the actual parameters for each part, and the water injection control is performed based on this result. Fully automated water injection control is possible, and skids etc. are not generated.
【図１】本発明によるスタンド間注水の自動制御方法の
処理例を示すフローチャートである。FIG. 1 is a flowchart showing a processing example of an automatic control method for water injection between stands according to the present invention.
【図２】熱間圧延設備の一例の概略を示す構成図であ
る。FIG. 2 is a configuration diagram showing an outline of an example of hot rolling equipment.
【図３】本発明にかかる温度下降予測モデルの算出式を
示す説明図である。FIG. 3 is an explanatory diagram showing a calculation formula of a temperature decrease prediction model according to the present invention.
【図４】本発明による注水制御の効果を示す説明図であ
る。FIG. 4 is an explanatory diagram showing an effect of water injection control according to the present invention.
１ 粗圧延機 ２ ホットランテーブル ３ クロップシャー ４ エッジヒータ ５ ＦＳＢ ６ 仕上圧延機 ７ スタンド間注水設備 ８ 温度計 ９ 温度計 １０ センサ群 １１ 制御装置 1 Rough rolling mill 2 Hot run table 3 Crop shear 4 Edge heater 5 FSB 6 Finishing rolling mill 7 Water injection equipment between stands 8 Thermometer 9 Thermometer 10 Sensor group 11 Controller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中原 道信 千葉県君津市君津１番地 新日本製鐵株式 会社君津製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Michinobu Nakahara 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Stock of Kimitsu Steel Co., Ltd.
Claims (1)
上圧延機のスタンド間でスタンド間注水設備により部分
注水を行って圧延機出側の仕上温度を目標値にする熱間
圧延において、予め設定した温度モデルおよび各部位毎
の実績パラメータに基づいて前記鋼板の仕上工程内にお
ける温度変化を算出し、この結果に基づいて注水制御を
行うことを特徴とするスタンド間注水の自動制御方法。1. In hot rolling in which a finishing temperature on the delivery side of a rolling mill is set to a target value by performing partial water injection between the stands of the finishing rolling machine by means of water supply between the stands of the finishing rolling machine, An automatic water injection control method between stands, wherein a temperature change in a finishing process of the steel sheet is calculated based on a preset temperature model and a performance parameter for each part, and water injection control is performed based on this result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5242155A JPH0775816A (en) | 1993-09-03 | 1993-09-03 | Method for automatically controlling water injection between stands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5242155A JPH0775816A (en) | 1993-09-03 | 1993-09-03 | Method for automatically controlling water injection between stands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0775816A true JPH0775816A (en) | 1995-03-20 |
Family
ID=17085150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5242155A Withdrawn JPH0775816A (en) | 1993-09-03 | 1993-09-03 | Method for automatically controlling water injection between stands |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0775816A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6220067B1 (en) | 1999-01-21 | 2001-04-24 | Kabushiki Kaisha Toshiba | Rolled material temperature control method and rolled material temperature control equipment of delivery side of rolling mill |
| JP2009226438A (en) * | 2008-03-21 | 2009-10-08 | Hitachi Ltd | Interstand cooling controlling system and method for hot rolling mill |
| JP2012040593A (en) * | 2010-08-20 | 2012-03-01 | Jfe Steel Corp | Device for controlling finishing temperature in hot rolling |
-
1993
- 1993-09-03 JP JP5242155A patent/JPH0775816A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6220067B1 (en) | 1999-01-21 | 2001-04-24 | Kabushiki Kaisha Toshiba | Rolled material temperature control method and rolled material temperature control equipment of delivery side of rolling mill |
| JP2009226438A (en) * | 2008-03-21 | 2009-10-08 | Hitachi Ltd | Interstand cooling controlling system and method for hot rolling mill |
| JP2012040593A (en) * | 2010-08-20 | 2012-03-01 | Jfe Steel Corp | Device for controlling finishing temperature in hot rolling |
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