JPH0371909A - Control method for plate width in hot continuous rolling - Google Patents
Control method for plate width in hot continuous rollingInfo
- Publication number
- JPH0371909A JPH0371909A JP1209113A JP20911389A JPH0371909A JP H0371909 A JPH0371909 A JP H0371909A JP 1209113 A JP1209113 A JP 1209113A JP 20911389 A JP20911389 A JP 20911389A JP H0371909 A JPH0371909 A JP H0371909A
- Authority
- JP
- Japan
- Prior art keywords
- plate width
- width
- rolling
- stand
- amount
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 15
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000005098 hot rolling Methods 0.000 claims description 9
- 238000003079 width control Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 abstract 4
- 238000007688 edging Methods 0.000 abstract 2
- 238000004364 calculation method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
０）産業上の利用分野
本発明は、熱間連続圧延機列における板幅制御方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION 0) Industrial Field of Application The present invention relates to a method for controlling strip width in continuous hot rolling mill rows.
Ｏ）従来技術
熱間連続圧延機列においては、スタンド間板幅縮み量の
正確な推定値が不明なため、仕上出側幅の偏差平均が大
きくばらつく。O) Conventional technology In continuous hot rolling mill rows, the accurate estimate of the width shrinkage between the stands is unknown, so the average deviation of the finished exit width varies widely.
従来法においては、スタンド間ルーパの張力設定値に対
してスタンド間板幅縮み量の推定を行っていた。しかし
、ルーバの機械的特性および制御特性により、修正どお
りの張力値を実現できない場合が多かった。In the conventional method, the amount of width reduction of the inter-stand plate was estimated based on the tension setting value of the inter-stand looper. However, due to the mechanical and control characteristics of the louver, it was often impossible to achieve the corrected tension value.
例えば、特公昭５３−８５４７号公報では、粗圧延機列
の出側圧延材の温度変動にもとづいて、仕上圧延機列に
おける圧延材の板幅変動をなくすために、スタンド間張
力目標値を変化させる制御方法を開示している。For example, in Japanese Patent Publication No. 53-8547, the inter-stand tension target value is changed based on the temperature fluctuation of the rolled material on the outlet side of the roughing mill row in order to eliminate the strip width fluctuation of the rolled material in the finishing rolling mill row. The present invention discloses a control method for controlling
しかし、この制御方法は、粗圧延機出側の幅偏差を考慮
していないため、この偏差と仕上スタンド間幅縮み偏差
との重ね合せとして生じる仕−Ｌ幅偏差の精度を保証で
きない。また、圧延材の温度偏差（基準との相対値）の
み考慮しており、絶対量を考えていないため、平均板幅
の適中精度に疑問が残り、スタンド間張力設定値変更に
対する追従性の問題、スタンド間張力変更による操業不
安定性などの欠点がある。However, since this control method does not take into account the width deviation on the exit side of the rough rolling mill, it cannot guarantee the accuracy of the finishing L width deviation that occurs as a combination of this deviation and the width shrinkage deviation between finishing stands. In addition, since only the temperature deviation of the rolled material (relative value with respect to the standard) is considered, and the absolute amount is not considered, there are doubts about the accuracy of the average strip width, and there are problems with followability to changes in the inter-stand tension setting value. , there are drawbacks such as operational instability due to changes in tension between stands.
また、特公昭５９−４４１２８号公報では、仕上圧延機
列における各スタンド間設定張力を用いて、仕上圧延機
列の出側板幅を予測し、この予測値と目標値との偏差が
最小になるようにスタンド間張力を制御する方法が開示
されている。Furthermore, in Japanese Patent Publication No. 59-44128, the width of the strip on the exit side of the finishing rolling mill row is predicted using the tension set between each stand in the finishing rolling mill row, and the deviation between this predicted value and the target value is minimized. A method for controlling tension between stands is disclosed.
しかし、この方法は、順次後段のルーパに対し張力変更
を行うと、逆に外乱となる恐れがある。However, in this method, if the tension is changed sequentially for the loopers at the subsequent stages, there is a risk that disturbances may occur.
また、オンライン実績を用いて制御を行っているため、
制御（板幅補正計算）が最下流のルーパに到達するまで
にはかなりの時間がたってしまい、不完全制御部分が長
くなるなどの欠点がある。In addition, since it is controlled using online results,
It takes a considerable amount of time for the control (plate width correction calculation) to reach the downstream looper, which has the disadvantage that the incompletely controlled portion becomes long.
（ハ）発明が解決しようとする課題
本発明が解決しようとする課題は、既存設備を大幅に変
更することなく、精度の高いスタンド間板幅縮み量を推
定できる熱間連続圧延における板幅制御方法を得ること
にある。(c) Problems to be Solved by the Invention The problems to be solved by the present invention are to control strip width in continuous hot rolling, which allows for highly accurate estimation of the amount of strip width shrinkage between stands without significantly changing existing equipment. It's about finding a way.
（→ 課題を解決するための手段
本発明の板幅制御方法は、複数スタンドからなる熱間連
続圧延機列による熱間連続圧延に適用される。本発明の
方法は、粗圧延後の圧延材の温度および板幅、仕上圧延
における第１スタンド出側の圧延材板幅、仕上圧延にお
ける最終スタンド出側の圧延材板幅、ならびに仕上圧延
におけるスタンド間ユニット張力を所定のサンプリング
区間ごとに実測し、該実測値にもとづいて圧延材の板幅
縮み量を推定し、該推定値にもとづいて仕上圧延前のエ
ツジヤによる板幅圧下量を調節することからなる手段に
よって、上記課題を解決している。(→ Means for Solving the Problems The strip width control method of the present invention is applied to continuous hot rolling by a row of hot continuous rolling mills consisting of a plurality of stands. The temperature and width of the rolled material, the width of the rolled material on the exit side of the first stand in finish rolling, the width of the rolled material on the exit side of the final stand in finish rolling, and the inter-stand unit tension in finish rolling were actually measured for each predetermined sampling section. The above problem is solved by means of estimating the amount of strip width reduction of the rolled material based on the actual measurement value, and adjusting the amount of strip width reduction by the edger before finish rolling based on the estimated value. .
（ホ）作 用
本発明の板幅制御方法においては、熱間連続圧延機列に
おける各スタンド間板幅縮み量に対する修正をルーパ張
力目標値に対して行うのではなく、熱間連続圧延機列の
直前に設置されたエツジヤに対して行う。(E) Effect In the strip width control method of the present invention, instead of correcting the amount of strip width shrinkage between each stand in the continuous hot rolling mill row with respect to the looper tension target value, Perform this on the Etsujia installed just before.
板幅縮み量の推定計算方法として、粗圧延機列の出側の
圧延材温度、スタンド間張力実績値を用い、各スタンド
間における板幅縮み量を推定し、これらにもとづいて総
合的な仕上スタンド間板幅縮み量を推定する。As a calculation method for estimating the amount of strip width shrinkage, the temperature of the rolled material at the exit side of the rough rolling mill row and the actual tension value between stands are used to estimate the amount of strip width shrinkage between each stand, and based on these, the overall finish is calculated. Estimate the amount of width reduction between the stands.
（へ）実施例
本発明の熱間連続圧延における板幅制御方法の実施例に
ついて、第１図を参照して説明する。(f) Example An example of the method for controlling strip width in continuous hot rolling according to the present invention will be described with reference to FIG.
本発明の板幅制御方法は、まず粗圧延機列１による粗圧
延後の圧延材２の温度および板幅を温度計３および板幅
計４によって測定する。次いで、熱間連続仕上圧延機５
による仕上圧延において第１スタンドＦ１出側の圧延材
２の板幅および最終スタンド間板幅縮の圧延材２の板幅
をそれぞれ板幅計６および７によって測定する。さらに
、スタンド間ユニット張力を各ルーパ８によって所定の
サンプリング区間ごとに実測する。In the strip width control method of the present invention, first, the temperature and strip width of the rolled material 2 after rough rolling by the rough rolling mill row 1 are measured using a thermometer 3 and a strip width meter 4. Next, hot continuous finishing rolling mill 5
In the finish rolling, the plate width of the rolled material 2 on the exit side of the first stand F1 and the plate width of the rolled material 2 at the final width reduction between the stands are measured by plate width gauges 6 and 7, respectively. Further, the inter-stand unit tension is actually measured by each looper 8 in each predetermined sampling section.
このサンプリング区間は、後述するように、メジセリン
グロール９によって測定する。This sampling section is measured by a medicering roll 9, as will be described later.
上述した各実測値にもとづいて、演算器１０により圧延
材２の板幅縮み量を推定し、この推定値にもとづいて圧
延機５の入側に設置されているエツジヤ１１の板幅圧下
量を調節する。Based on the above-mentioned actual measurement values, the calculation unit 10 estimates the amount of strip width reduction of the rolled material 2, and based on this estimated value, the strip width reduction amount of the edger 11 installed on the entrance side of the rolling mill 5 is calculated. Adjust.
次に、本発明の方法の作用について詳述する。Next, the operation of the method of the present invention will be explained in detail.
ｎスタンドを有する熱間連続圧延機列において、各スタ
ンドにおける単位スタンド間ユニット張力による板幅縮
み量をαｓ （ｔ＝１．２，３゜ｎ）、任意のサンプ
リング区間（ｊ番目）における第１スタンド出側のユニ
ット張力をσ１ｊとすると、第ｊ番目サンプリング区間
における最終スタンドに到るまでのスタンド間板幅縮み
量ΔＷ。In a continuous hot rolling mill row having n stands, the amount of sheet width shrinkage due to the unit tension between the stands in each stand is αs (t=1.2,3°n), and the first If the unit tension on the exit side of the stand is σ1j, then the amount of shrinkage ΔW of the board width between the stands until reaching the final stand in the j-th sampling section.
は、次式（Ｌ）で表される。is expressed by the following formula (L).
ΔＷｊ″、モα１σ１ｊ ………………（１）ただし
、σ１ｊはスタンド間ユニット張力である。ΔWj″, α1σ1j (1) where σ1j is the inter-stand unit tension.
上記のサンプリング区間は、粗圧延機列の出側において
、粗圧延材の板幅および温度を測定したサンプリング区
間と同じである。またこの各区間においてエツジヤの開
度制御を行う。さらに、エツジヤの入側に設けたメジャ
リングロールによって区間情報が与えられる。The above sampling section is the same as the sampling section where the width and temperature of the rough rolled material were measured on the exit side of the rough rolling mill row. Also, the opening degree of the edger is controlled in each section. Furthermore, section information is given by a measuring roll provided on the input side of the edger.
α１を任意の推定値とし、σ１ｊを実績値として、この
サンプリング区間における最終スタンドに到るまでのス
タンド間板幅縮み全実績値をΔＷ。Let α1 be an arbitrary estimated value and σ1j be the actual value, and the total actual value of the width reduction between stands up to the final stand in this sampling section is ΔW.
ａコ
（＝最終スタンド板幅−第１スタンド板幅）とすると、
前述の実績値と推定値との差ｅ、は各サンコ
プリング区間に対し次式（２）で表される。If it is a (= final stand board width - first stand board width),
The difference e between the actual value and the estimated value described above is expressed by the following equation (2) for each Sankopling section.
別に行う。Do it separately.
・・・・・・・・・・・・・・・ 〈２〉本発明におい
ては、上記ｅ、の２乗値のサンプリング数についての総
和が最小となるようにα１を推定する。<2> In the present invention, α1 is estimated so that the sum of the sampling numbers of the square values of e is minimized.
・・・・・・・・・・・・・・・ （３）ただし、ｎ：
スタンド数
Ｎ：サンプリング個数
したがって、α、はｎ元連立方程式を解けばよい。この
ようにして推定されたα を〔α、（Ｔ、））とし、同
様に各温度範囲内での推定値を得る。・・・・・・・・・・・・・・・ (3) However, n:
Number of stands N: Number of samplings Therefore, α can be determined by solving n-dimensional simultaneous equations. Let α estimated in this way be [α, (T, )), and similarly estimate values within each temperature range are obtained.
ここでＴＩ （ｔ ＝１ 、２．・・・）は、粗圧延
機出口での例えば、第２図（Ａ） 、 （Ｂ） 、 （
Ｃ）に示すように、サンプリングを行い、材料温度によ
る幅縮み挙動の違いを考慮するため、下記の計算を粗餐
口温度ただし、ｎ′は損出口温度層別数。Here, TI (t = 1, 2,...) is, for example, as shown in Fig. 2 (A), (B), (
As shown in C), in order to take into account the difference in width shrinkage behavior due to material temperature by sampling, the following calculation is performed using the rough outlet temperature, where n' is the number of stratifications of the loss outlet temperature.
この推定計算は、同じ炭素台ａ量、同じ寸法の間で行わ
れる。すなわち、上記グループの中において、圧延材間
の差異が生じた場合には、両者の平均値をとり、これを
新しい推定値として保存しておく。This estimation calculation is performed between the same amount of carbon supports and the same dimensions. That is, if there is a difference between the rolled materials in the above group, the average value of both is taken and this is stored as a new estimated value.
以上により求めた単位スタンド間張力による板幅縮み全
推定値を用い、圧延材が粗圧延機列の出口を通過し、そ
この粗圧延材の温度および板幅を計測された瞬間より、
これらの測定値、圧下スケジュール、各スタンド間張力
目標値、および推定値〔α１ （ＴＫ）〕を用いて、最
終スタンドに到ルマテノ粗出口温度ＴＫである区間につ
いてのスタンド間板幅縮み量〔ΔＷ（ＴＫ）〕を推定す
る。Using the total estimated value of the strip width shrinkage due to the unit tension between stands obtained above, the rolled material passes the exit of the rough rolling mill row, and from the moment the temperature and strip width of the rough rolled material there are measured,
Using these measured values, the reduction schedule, the target inter-stand tension value, and the estimated value [α1 (TK)], the inter-stand plate width shrinkage [ΔW (TK)].
この〔ΔＷ（ＴＫ）〕を次式（５）で表す。This [ΔW(TK)] is expressed by the following equation (5).
ただし、
Ｔｌｏ：スタンド間張力目標値
ＷＲ：粗圧延機列出口板幅平均値
ｈｉｏ ：各スタンド出側厚推定値
（圧下スケジュールより計算）
この板幅縮み推定値（サンプリングごと）、粗圧延機列
出口板幅、仕上圧延機列前のエツジヤ圧下量、第１スタ
ンド出口板幅より求めたエツジヤ幅調整効率を加味して
、仕上出口幅が目標板幅に到るように、第１スタンド出
口幅が、（仕上出口目標値＋〔ΔＷ（ＴＫ）〕）となる
ように、エツジヤ開度を各サンプリングごとに設定する
。任意サンプリング（第ｊ番目とする）におけるエツジ
ヤ開度の設定式を下記に示す。However, Tlo: Inter-stand tension target value WR: Roughing mill row exit strip width average value hio: Each stand exit side thickness estimated value (calculated from rolling schedule) This strip width shrinkage estimate (for each sampling), roughing mill row exit thickness value Taking into consideration the edge width adjustment efficiency obtained from the outlet plate width, the edge reduction amount in front of the finishing rolling mill row, and the first stand outlet plate width, the first stand outlet width is adjusted so that the finishing outlet width reaches the target plate width. The edger opening degree is set for each sampling so that (finish exit target value + [ΔW (TK)]). The formula for setting the edger opening in arbitrary sampling (assumed to be the j-th one) is shown below.
ただ腰
ｓＥｊ：
第ｊ番目サンプリング区間における
エツジヤ開度
ＷＲｊ：第ｊ番目サンプリング区間における粗圧延機出
口板幅
η ：エッジャの板幅調整効率
ＷＦｏ’仕上出口目標幅
φ）効 果
本発明の方法によれば、既存設備のわずかな変更によっ
て、正確な板幅縮み制御を行うことができる。Edger opening WRj: Edger opening degree WRj in the j-th sampling section: Roughing mill outlet strip width η in the j-th sampling section: Edger strip width adjustment efficiency WFo'finishing outlet target width φ) Effect of the method of the present invention According to the above, accurate sheet width shrinkage control can be performed by making slight changes to existing equipment.
第１図は本発明の方法を適用した熱間連続圧延ラインの
説明図。
第２図はサンプリング動作の説明図。
１
：粗圧延機列
：圧延材
３：温度計
４゜
６゜
：板幅計
５：連続仕上圧延機列
９：メジャリングロール
： ル−ノく
１１：エツジヤFIG. 1 is an explanatory diagram of a continuous hot rolling line to which the method of the present invention is applied. FIG. 2 is an explanatory diagram of the sampling operation. 1: Rough rolling mill row: Rolled material 3: Thermometer 4°6°: Plate width total 5: Continuous finishing mill row 9: Measuring roll: Run 11: Etsuya
Claims (1)
る第１スタンド出側の圧延材板幅、仕上圧延における最
終スタンド出側の圧延材板幅、ならびに仕上圧延におけ
るスタンド間ユニット張力を所定のサンプリング区間ご
とに実測し、該実測値にもとづいて圧延材の板幅縮み量
を推定し、該推定値にもとづいて仕上圧延前のエッジャ
による板幅圧下量を調節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。The temperature and width of the rolled material after rough rolling, the width of the rolled material on the exit side of the first stand in finish rolling, the width of the rolled material on the exit side of the final stand in finish rolling, and the inter-stand unit tension in finish rolling are adjusted to a predetermined value. A hot rolling method characterized in that actual measurements are taken for each sampling section, the amount of sheet width shrinkage of the rolled material is estimated based on the measured values, and the amount of sheet width reduction by an edger before finish rolling is adjusted based on the estimated value. Strip width control method in continuous rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1209113A JPH0636928B2 (en) | 1989-08-11 | 1989-08-11 | Strip width control method in hot continuous rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1209113A JPH0636928B2 (en) | 1989-08-11 | 1989-08-11 | Strip width control method in hot continuous rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0371909A true JPH0371909A (en) | 1991-03-27 |
| JPH0636928B2 JPH0636928B2 (en) | 1994-05-18 |
Family
ID=16567503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1209113A Expired - Lifetime JPH0636928B2 (en) | 1989-08-11 | 1989-08-11 | Strip width control method in hot continuous rolling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636928B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001705A1 (en) * | 1994-07-07 | 1996-01-25 | Siemens Aktiengesellschaft | Metal band rolling process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6268616A (en) * | 1985-09-20 | 1987-03-28 | Sumitomo Metal Ind Ltd | Plate width control method |
-
1989
- 1989-08-11 JP JP1209113A patent/JPH0636928B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6268616A (en) * | 1985-09-20 | 1987-03-28 | Sumitomo Metal Ind Ltd | Plate width control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001705A1 (en) * | 1994-07-07 | 1996-01-25 | Siemens Aktiengesellschaft | Metal band rolling process |
| US5740686A (en) * | 1994-07-07 | 1998-04-21 | Siemens Aktiengesellschaft | Method and apparatus for rolling a metal strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0636928B2 (en) | 1994-05-18 |
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