JPH06304635A - Method for controlling plate thickness at bitten end part in plate rolling - Google Patents
Method for controlling plate thickness at bitten end part in plate rollingInfo
- Publication number
- JPH06304635A JPH06304635A JP5095816A JP9581693A JPH06304635A JP H06304635 A JPH06304635 A JP H06304635A JP 5095816 A JP5095816 A JP 5095816A JP 9581693 A JP9581693 A JP 9581693A JP H06304635 A JPH06304635 A JP H06304635A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- biting
- roll
- roll opening
- plate
- 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】この発明は板圧延の噛み込み端部
の板厚制御方法に係り、特に可逆圧延機による圧延材の
噛み込み端部の板厚偏差を低減するための板厚制御方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a plate thickness at a biting end of a plate rolling, and more particularly to a plate thickness controlling method for reducing a plate thickness deviation at a biting end of a rolled material by a reversible rolling mill. Regarding
【０００２】[0002]
【従来の技術】厚板圧延に用いられるＡＧＣ（Automati
c Gauge Control)としてはゲージメータ方式が一般的で
あり、その原理は圧延後の板厚Ｈが圧延中のロール間隔
Ｓによって決まり、圧延中のロール間隔Ｓは無負荷時の
ロール間隔Ｓ0 と負荷時の圧延機の変形量によって定ま
るとするものである。圧延機の変形量は圧延荷重Ｆによ
って決まり、圧延機の変形は弾性変形であるから圧延荷
重Ｆに比例する。2. Description of the Related Art AGC (Automati) used for plate rolling
c Gauge Control) is generally a gauge meter system, the principle of which is determined by the roll spacing S during rolling of the sheet thickness H after rolling, and the roll spacing S during rolling is equal to the roll spacing S 0 during no load. It is supposed to be determined by the amount of deformation of the rolling mill under load. The amount of deformation of the rolling mill is determined by the rolling load F, and since the deformation of the rolling mill is elastic deformation, it is proportional to the rolling load F.
【０００３】すなわち、下記(1) 式 Ｈ＝Ｓ0 ＋Ｆ／Ｋ ……………(1) ここで、Ｋは圧延機のミル定数である。の関係となる。
ところで、油圧ＡＧＣの場合は圧延機が板を噛み込む際
は衝撃力のため油柱高さが変動し、セットアップ時のロ
ール間隔Ｓ0 に対して偏差ΔＳが生じる。また噛み込み
端部の塑性定数偏差ΔＱ、圧延機入側の板厚偏差ΔＨな
どにより、セットアップロール間隔Ｓ0 を計算した際に
用いた予測荷重Ｆ0 に対して偏差ΔＦが生じて、ミル伸
び量偏差ΔMSが生じる。これら油柱高さ変動によるΔＳ
と荷重変動によって生じるミル伸び量偏差ΔMSにより、
噛み込み端部に大きな板厚偏差が生じる。That is, the following formula (1) H = S 0 + F / K (1) Here, K is a mill constant of the rolling mill. It becomes a relationship.
By the way, in the case of hydraulic AGC, when the rolling mill bites the plate, the height of the oil column fluctuates due to the impact force, which causes a deviation ΔS with respect to the roll interval S 0 at the time of setup. Further, due to the plastic constant deviation ΔQ at the biting end, the plate thickness deviation ΔH at the rolling mill entrance side, etc., a deviation ΔF occurs with respect to the predicted load F 0 used when calculating the setup roll interval S 0 , and the mill elongation is increased. A quantity deviation ΔMS occurs. ΔS due to these oil column height fluctuations
And the mill elongation deviation ΔMS caused by load fluctuation,
Large plate thickness deviation occurs at the bite end.
【０００４】このような圧延材の噛み込み端部の板厚偏
差を低減させるために、例えば特開昭63− 72416号公報
には噛み込み端部の板厚補償方法が提案されている。す
なわち、その内容は前パスでの圧延方向板中央部の圧延
荷重と噛み込み端部の圧延荷重の偏差を測定し、この荷
重偏差から次パスでの噛み込み端部の板厚変動量を予測
し、この予測値に基づいて次パスのロール開度の設定値
を修正するようにしたものである。In order to reduce the plate thickness deviation at the biting end of the rolled material, for example, Japanese Patent Laid-Open No. 63-72416 proposes a plate thickness compensating method at the biting end. That is, the content is to measure the deviation between the rolling load at the center of the rolling direction plate and the rolling load at the biting end in the previous pass, and predict the plate thickness fluctuation amount at the biting end in the next pass from this load deviation. Then, the set value of the roll opening degree of the next pass is corrected based on this predicted value.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
た特開昭63− 72416号の従来例においては、噛み込み時
の油柱高さ変動や端部の塑性定数を十分予測することが
できず、また噛み込み端部の適正なロール開度補正は板
長手方向の各ポイントで異なるため、十分に板厚偏差を
低減することができないという問題がある（例えば図
４，５参照）。However, in the above-mentioned conventional example of Japanese Patent Laid-Open No. 63-72416, it is not possible to sufficiently predict the oil column height variation at the time of biting and the plastic constant of the end, Further, since the proper roll opening correction of the bite end differs at each point in the plate longitudinal direction, there is a problem that the plate thickness deviation cannot be reduced sufficiently (see, for example, FIGS. 4 and 5).
【０００６】この発明は、上記のような従来技術の有す
る課題を解決した板圧延の噛み込み端部の板厚制御方法
を提供することを目的とする。An object of the present invention is to provide a method for controlling the plate thickness of the biting end of plate rolling which solves the problems of the prior art as described above.
【０００７】[0007]
【課題を解決するための手段】この発明は、可逆圧延機
を用いた板圧延における圧延材噛み込み端部の板厚を制
御する方法において、前々パスの噛み込み端部および前
パスの噛み抜け端部の圧延荷重とロール開度を実測し、
これらの実測値と次パスの噛み込み時の圧延速度とから
次パスの噛み込み時の圧延荷重変動を予測し、この予測
値を用いて油柱高さ変動、ミル伸び量および制御系の応
答遅れを予測して、次パスの噛み込み時のロール開度を
圧延材の長手方向の各位置で補正することを特徴とする
板圧延の噛み込み端部の板厚制御方法である。SUMMARY OF THE INVENTION The present invention is a method for controlling the plate thickness of a rolled material biting end in a sheet rolling using a reversible rolling mill. Measure the rolling load and roll opening at the exit end,
From these measured values and the rolling speed when the next pass bites, predict the rolling load fluctuation when the next pass bites, and use these predicted values to predict the fluctuation of oil column height, mill elongation, and control system response. A method for controlling the plate thickness at the biting end of plate rolling, which predicts a delay and corrects the roll opening at the time of biting in the next pass at each position in the longitudinal direction of the rolled material.
【０００８】[0008]
【作 用】以下に、本発明の基本的な考え方を説明す
る。まず、ｎ−２パスの噛み込み端部の圧延荷重
Ｆn-2 、ロール開度Ｓn-2 を実測して板厚Ｈn-2 を鋼板
上の各ポイントで下記式(2) を用いて計算する。 Ｈn-2 ＝Ｓn-2 ＋Ｆn-2 ／Ｋ ……………(2) つぎに、ｎ−１パスの噛み抜け端部の板厚変動Ｈn-1 を
下記(3) 式で計算する。[Operation] The basic idea of the present invention will be described below. First, rolling force F n-2 ends biting of n-2-pass, the following equation (2) used in measuring the roll angle S n-2 the plate thickness H n-2 at each point on the steel sheet Calculate. H n-2 = S n-2 + F n-2 / K (2) Next, the plate thickness variation H n-1 at the bite-through end of the n-1 path is expressed by the following equation (3). calculate.
【０００９】 Ｈn-1 ＝Ｓn-1 ＋Ｆn-1 ／Ｋ ……………(3) ここで、ｎ−２パスの噛み込み端部の板厚は、ｎ−１パ
スの噛み抜け端部の入側板厚となるため、これによりｎ
−１パスの噛み抜け端部の塑性定数Ｑn-1 が求まる。 Ｑn-1 ＝Ｆn-1 ／（Ｈn-2 −Ｈn-1 ） ……………(4) ｎ−１パスの噛み抜け端部の板厚Ｈn-1 （ｎパスの噛み
込み端部の入側板厚）および塑性定数Ｑn-1 を用いて、
ｎパスの噛み込み端部の荷重変動Ｆn * を下記(5) 式で
予測する。H n-1 = S n-1 + F n-1 / K (3) Here, the plate thickness of the biting end of the n-2 pass is the biting out of the n-1 pass. Since the thickness at the end is the entrance side plate thickness, n
The plastic constant Qn -1 of the -1 pass bite-out end portion is obtained. Qn -1 = Fn-1 / (Hn -2- Hn -1 ) (4) n-1 pass bite thickness Hn -1 (n-pass bite (Inlet side plate thickness of recessed end) and plastic constant Q n-1
The load fluctuation F n * at the biting end of the n path is predicted by the following equation (5).
【００１０】 Ｆn * ＝ｆ（Ｈaimn，Ｈn-1 ，Ｗn ，Ｑn-1,…） ……………(5) ここで、Ｈaimnはｎパス目標板厚、Ｗn はｎパス時の圧
延板幅である。このｎパスの噛み込み端部の荷重変動Ｆ
n * とｎパスの予定噛み込み速度Ｖn *より、油柱変動
量ΔＳn をモデルより求める。 ΔＳn ＝ｆ（Ｆn , Ｖn ） ……………(6) つぎに、ｎパスのセットアップロール開度計算に用いた
予測荷重Ｆ0nと荷重変動Ｆn * より、ミル伸び偏差ΔMS
n を計算する。F n * = f (H aimn , H n-1 , W n , Q n-1, ...) (5) Here, H aimn is an n-pass target plate thickness, and W n is It is the width of the rolled plate during n passes. Load fluctuation F at the biting end of this n path
n * and than the speed V n * biting schedule of n path, determined from the model of the oil column variation ΔS n. ΔS n = f (F n , V n ) ... (6) Next, from the predicted load F 0n and the load fluctuation F n * used for the n-pass setup roll opening calculation, the mill elongation deviation ΔMS
Calculate n .
【００１１】 ΔMSn ＝（Ｆn * −Ｆ0n）／Ｋn ……………(7) そして、荷重変動Ｆn * 、予定噛み込み速度Ｖn * より
ロックオン後の制御系の応答遅れΔAGC n を予測する。 ΔAGC n ＝ｆ（Ｆn * , Ｖn * ） ……………(8) 上記のようにして求められたΔＳn ，ΔMSn ，ΔAGC n
より噛み込み時のロール開度を板が噛み込んでから長手
方向各位置に対して、下記(9) 式となるように制御する
ようにする。ΔMS n = (F n * −F 0n ) / K n (7) Then, the response delay of the control system after lock-on is determined by the load fluctuation F n * and the planned biting speed V n *. Predict ΔAGC n . ΔAGC n = f (F n * , V n * ) (8) ΔS n , ΔMS n , ΔAGC n obtained as described above
The roll opening at the time of further biting is controlled so that the following formula (9) is obtained for each position in the longitudinal direction after the plate is biting.
【００１２】 Ｓ＝Ｓ0 ＋ΔＳn ＋ΔMSn ＋ΔAGC n ……………(9) このようにして、各実測データの比較、演算を圧延材の
長手方向同一ポイントにおいて行うようにしたので、ワ
ークロールの回転数検出器の測定データにより正確にト
ラッキングを行い、また噛み込み時の補正量もそのトラ
ッキングデータに基づき、長手方向の各ポイントに最適
な補正ができるようになされている。S = S 0 + ΔS n + ΔMS n + ΔAGC n (9) In this way, since the comparison and calculation of the measured data are performed at the same point in the longitudinal direction of the rolled material, the work roll is used. Accurate tracking is performed based on the measurement data of the rotation speed detector, and the correction amount at the time of biting can also be optimally corrected at each point in the longitudinal direction based on the tracking data.
【００１３】[0013]
【実施例】以下に、この発明の実施例について図面を参
照して詳しく説明する。図１は、本発明の実施例を示す
ブロック図である。図に示すように、圧延材１は上下一
対のバックアップロール２，２にバックアップされる上
下一対のワークロール３，３で圧延されるが、その圧下
量は油圧シリンダ４によって制御される。その際、ワー
クロール３，３のロール開度Ｓはマグネスケール５で検
出され、また圧延荷重Ｆはロードセル６でワークロール
２の回転数Ｗはパルスジェネレータ７によってそれぞれ
検出される。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. As shown in the figure, the rolled material 1 is rolled by a pair of upper and lower work rolls 3, 3 backed up by a pair of upper and lower backup rolls 2, 2, and the reduction amount thereof is controlled by a hydraulic cylinder 4. At that time, the roll opening S of the work rolls 3, 3 is detected by the magnet scale 5, the rolling load F is detected by the load cell 6, and the rotation speed W of the work roll 2 is detected by the pulse generator 7.
【００１４】そして、ＡＧＣ制御盤８よりコントローラ
９を介して上位のプロセスコンピュータ10に圧延中の圧
延荷重Ｆ、ロール開度Ｓおよびワークロール回転数Ｗが
送り込まれると、プロセスコンピュータ10において噛み
込み端部の長手方向の各ポイントでのロール開度補正量
ΔＳを演算してコントローラ９に出力する。さらに、コ
ントローラ９において、パルスジェネレータ７からのワ
ークロール回転数によって、板が噛み込んでからの長手
方向の制御ポイントを検出し、ＡＧＣ制御盤８を介して
サーボアンプ11に制御すべきロール開度補正量ΔＳを出
力し、サーボ弁12を介して油圧シリンダ４を操作するこ
とにより、ワークロール３，３のロール開度Ｓを所定の
値に変更制御する。Then, when the rolling load F during rolling, the roll opening S and the work roll rotational speed W are sent from the AGC control panel 8 to the upper process computer 10 via the controller 9, the process computer 10 causes the biting end. The roll opening correction amount ΔS at each point in the longitudinal direction of the section is calculated and output to the controller 9. Further, in the controller 9, the control point in the longitudinal direction after the plate is bitten is detected by the work roll rotation number from the pulse generator 7, and the roll opening to be controlled by the servo amplifier 11 via the AGC control panel 8. By outputting the correction amount ΔS and operating the hydraulic cylinder 4 via the servo valve 12, the roll opening S of the work rolls 3, 3 is controlled to be changed to a predetermined value.
【００１５】図２は本発明を適用したときの噛み込み端
部におけるロール開度補正の推移および荷重変動の推移
の一例を示したものであり、図３はそのときの噛み込み
端部の板厚分布の推移を示したものである。図３から明
らかなように、本発明の方法を適用することにより板厚
偏差が大幅に低減することがわかる。FIG. 2 shows an example of the transition of the roll opening correction and the transition of the load variation at the bite end when the present invention is applied, and FIG. 3 shows the plate of the bite end at that time. This shows the transition of the thickness distribution. As is clear from FIG. 3, the plate thickness deviation is significantly reduced by applying the method of the present invention.
【００１６】[0016]
【発明の効果】以上説明したように、この発明によれ
ば、従来の方法に比べて圧延材の噛み込み端部の板厚偏
差を大幅に低減させることができ、これによって製品歩
留りの向上を図ることが可能である。As described above, according to the present invention, it is possible to significantly reduce the plate thickness deviation at the biting end portion of the rolled material as compared with the conventional method, thereby improving the product yield. It is possible to plan.
【図１】本発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】本発明法による噛み込み端部におけるロール開
度補正と荷重変動の推移の一例を示した特性図である。FIG. 2 is a characteristic diagram showing an example of roll opening correction and load change transition at a biting end according to the method of the present invention.
【図３】本発明法による噛み込み端部の板厚分布の推移
を示した特性図である。FIG. 3 is a characteristic diagram showing a transition of plate thickness distribution at a biting end portion according to the method of the present invention.
【図４】従来の噛み込み端部におけるロール開度補正と
荷重変動の推移の一例を示した特性図である。FIG. 4 is a characteristic diagram showing an example of a roll opening correction and a load change transition at a conventional biting end portion.
【図５】従来の噛み込み端部の板厚分布の推移の一例を
示した特性図である。FIG. 5 is a characteristic diagram showing an example of transition of plate thickness distribution of a conventional biting end portion.
１ 圧延材 ２ バックアップロール ３ ワークロール ４ 油圧シリンダ ５ マグネスケール ６ ロードセル ７ パルスジェネレータ ８ ＡＧＣ制御盤 ９ コントローラ 10 プロセスコンピュータ 11 サーボアンプ 12 サーボ弁 Ｆ 圧延荷重 Ｓ ロール開度 ΔＳ ロール開度補正量 Ｗ ワークロール回転数 1 Rolled material 2 Backup roll 3 Work roll 4 Hydraulic cylinder 5 Magnescale 6 Load cell 7 Pulse generator 8 AGC control panel 9 Controller 10 Process computer 11 Servo amplifier 12 Servo valve F Rolling load S Roll opening ΔS Roll opening correction amount W Work Roll speed
Claims (1)
延材噛み込み端部の板厚を制御する方法において、前々
パスの噛み込み端部および前パスの噛み抜け端部の圧延
荷重とロール開度を実測し、これらの実測値と次パスの
噛み込み時の圧延速度とから次パスの噛み込み時の圧延
荷重変動を予測し、この予測値を用いて油柱高さ変動、
ミル伸び量および制御系の応答遅れを予測して、次パス
の噛み込み時のロール開度を圧延材の長手方向の各位置
で補正することを特徴とする板圧延の噛み込み端部の板
厚制御方法。1. A method for controlling the plate thickness at the biting end of a rolled material in plate rolling using a reversible rolling mill, wherein the rolling load and roll at the biting end of the front-to-front pass and the biting-out end of the front pass. Measure the opening, predict the rolling load fluctuation during biting of the next pass from these measured values and the rolling speed during biting of the next pass, and use this predicted value to predict the fluctuation of oil column height,
A plate at the biting end of the plate rolling characterized by predicting the amount of mill elongation and the response delay of the control system and correcting the roll opening at the time of biting of the next pass at each position in the longitudinal direction of the rolled material. Thickness control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09581693A JP3350140B2 (en) | 1993-04-22 | 1993-04-22 | Control method of sheet thickness at biting edge of sheet rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09581693A JP3350140B2 (en) | 1993-04-22 | 1993-04-22 | Control method of sheet thickness at biting edge of sheet rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06304635A true JPH06304635A (en) | 1994-11-01 |
| JP3350140B2 JP3350140B2 (en) | 2002-11-25 |
Family
ID=14147952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09581693A Expired - Fee Related JP3350140B2 (en) | 1993-04-22 | 1993-04-22 | Control method of sheet thickness at biting edge of sheet rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3350140B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015134374A (en) * | 2013-12-20 | 2015-07-27 | 株式会社神戸製鋼所 | Plate thickness control method for rolling machine |
| JP2022059387A (en) * | 2020-10-01 | 2022-04-13 | Ｊｆｅスチール株式会社 | Plate thickness control method, plate material manufacturing method, and plate thickness control device |
-
1993
- 1993-04-22 JP JP09581693A patent/JP3350140B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015134374A (en) * | 2013-12-20 | 2015-07-27 | 株式会社神戸製鋼所 | Plate thickness control method for rolling machine |
| JP2022059387A (en) * | 2020-10-01 | 2022-04-13 | Ｊｆｅスチール株式会社 | Plate thickness control method, plate material manufacturing method, and plate thickness control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3350140B2 (en) | 2002-11-25 |
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