JPH08252620A - Method for calculating elongation percentage - Google Patents
Method for calculating elongation percentageInfo
- Publication number
- JPH08252620A JPH08252620A JP7055450A JP5545095A JPH08252620A JP H08252620 A JPH08252620 A JP H08252620A JP 7055450 A JP7055450 A JP 7055450A JP 5545095 A JP5545095 A JP 5545095A JP H08252620 A JPH08252620 A JP H08252620A
- Authority
- JP
- Japan
- Prior art keywords
- elongation
- elongation percentage
- elongation rate
- deviation
- absolute value
- 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
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】所定の伸び率を付与する場合にお
ける伸び率演算方法に関し、特に金属等の帯状物等の圧
延機やテンションレベラー等に適用するのに、好適な伸
び率演算方法に関するものである。[Industrial field of application] A method for calculating an elongation rate when a predetermined elongation rate is given, and particularly a method for calculating an elongation rate suitable for application to a rolling mill or a tension leveler for strips of metal or the like. Is.
【０００２】[0002]
【従来の技術】金属帯等の帯状物は圧延機やテンション
レベラー等において帯状物の材質やサイズ等から定める
所定の伸び率が付与される。圧延機やテンションレベラ
ー等における帯状物の伸び率演算は、一般的に当該装置
の前後に配置したブライドルロールあるいはデフレクタ
ーロールの端部に取り付けられたパルス発生装置のパル
ス数を通過する帯状物の定距離（単位測定長さ）毎に測
定し、次式によって計算するようになっている。2. Description of the Related Art A strip such as a metal strip is provided with a predetermined elongation rate determined by the material and size of the strip in a rolling mill, a tension leveler or the like. The elongation of strips in rolling mills, tension levelers, etc. is generally calculated by determining the strips that pass the pulse number of the pulse generator installed at the end of the bridle roll or deflector roll placed before and after the device. The measurement is made for each distance (unit measurement length), and the calculation is made by the following formula.
【０００３】たとえば、入り側出側各ブライドルロール
に取り付けられたパルス発生装置で同時に長さの計測を
開始し、入り側で計測された長さがｌE となったときの
出側で計測された長さをｌD とすると、帯状物の伸び率
εは、 ε＝｛（ｌD −ｌE ）／ｌE ｝×１００〔％〕 で求められる。通常、ｌE をある定距離（単位測定長
さ）として伸び率の計測を行なう。For example, the pulse generators attached to the entrance-side and exit-side bridle rolls simultaneously start measuring the length, and when the length measured on the entrance side reaches l E , the length is measured on the exit side. Letting the length be l D , the elongation rate ε of the band-shaped material can be obtained by ε = {(l D −l E ) / l E } × 100 [%]. Usually, the elongation rate is measured with l E as a constant distance (unit measurement length).
【０００４】この場合、計測誤差として１パルス分に対
応する誤差を避けることができない。従って、ｌE を大
きくすればするほど計測誤差は小さくなるが、それに伴
って計測に必要な走向距離（時間）即ちサンプリング間
隔（時間）が長くなって応答性が悪くなるという問題点
がある。In this case, an error corresponding to one pulse cannot be avoided as a measurement error. Therefore, the larger the value of l E , the smaller the measurement error, but there is a problem that the traveling distance (time) required for measurement, that is, the sampling interval (time) becomes longer and the response becomes worse.
【０００５】このような帯状物の伸び率演算にあたっ
て、伸び率制御の応答性を改善する技術としては、特開
昭６０−１８０６１５号公報や特開平１−７１５１１号
公報のように帯状物の処理速度に応じて単位測定長さを
変更することにより、低速部の検出時間を短縮する技術
や、特開昭６０−１４８６１２号公報のように、低速時
のパルス数のカウントを定距離カウントから定時間カウ
ントに切り換える技術や、特開平６−１１３３９号公報
のように帯状物の伸び率検出周期をその伸び率自体によ
り変化させ、伸び率演算の測定精度を向上させる技術が
知られている。As a technique for improving the responsiveness of elongation control in the elongation calculation of such a belt, a belt treatment as disclosed in JP-A-60-180615 and JP-A-1-71511 is used. A technique for shortening the detection time of the low speed portion by changing the unit measurement length according to the speed, and the count of the pulse number at the low speed is determined from the constant distance count as in Japanese Patent Laid-Open No. 60-148612. There is known a technique of switching to a time count and a technique of improving the measurement accuracy of the elongation rate calculation by changing the elongation rate detection period of the belt-like material according to the elongation rate itself as in JP-A-6-11339.
【０００６】[0006]
【発明が解決しようとする課題】特開昭６０−１８０６
１５号公報や特開平１−７１５１１号公報の技術は、低
速時の伸び率検出の応答性は向上するが、伸び率の測定
長さが短くなるため、伸び率検出精度が劣る。特に、低
伸び率材料では、その精度が著しく劣ることになる。[Problems to be Solved by the Invention] JP-A-60-1806
The techniques of Japanese Patent Laid-Open No. 15 and Japanese Patent Application Laid-Open No. 1-71511 improve the response of elongation rate detection at low speed, but the elongation length measurement length is short, so the elongation rate detection accuracy is poor. Especially, in the case of a material having a low elongation, its accuracy is remarkably inferior.
【０００７】また、特開昭６０−１４８６１２号公報の
技術は、応答性を改善する方法が異なるが上記と同様の
問題点がある。The technique disclosed in Japanese Patent Laid-Open No. 60-148612 is different in the method of improving responsiveness, but has the same problem as described above.
【０００８】特開平６−１１３３９号公報の技術は、低
伸び率から高伸び率まで伸び率検出の精度は向上し、か
つ高伸び率材料では伸び率検出の応答性が向上する利点
を有するが、同一材料では伸び率検出周期が一定であ
る。一方、伸び率計で検出された伸び率を使用して、伸
び率の制御を行なう場合には、伸び率検出周期が一種の
無駄時間となり、制御系を不安定にする要因となる。と
くに、伸び率の目標値と実際値との偏差が大きい場合に
は、操作量も大きくなるため、操作結果を早くフィード
バックする必要がある。しかしながら、従来の伸び率検
出方法では、前述したように、同一材料では伸び率の検
出周期が一定であるので、特に偏差が大きい場合の応答
性が不十分となるという問題点を有していた。The technique of Japanese Patent Laid-Open No. 6-11339 has the advantage that the accuracy of elongation rate detection is improved from a low elongation rate to a high elongation rate, and that the response rate of elongation rate detection is improved for high elongation rate materials. , The elongation detection cycle is constant for the same material. On the other hand, when the elongation rate is controlled by using the elongation rate detected by the extensometer, the elongation rate detection cycle becomes a kind of dead time, which causes the control system to become unstable. In particular, when the deviation between the target value and the actual value of the elongation rate is large, the operation amount also becomes large, and thus the operation result needs to be fed back quickly. However, in the conventional elongation rate detection method, as described above, since the elongation rate detection cycle is constant for the same material, there is a problem in that the responsiveness becomes insufficient especially when the deviation is large. .
【０００９】本発明は、このような問題点を解決するた
めになされたもので、伸び率の目標値と実際値との偏差
が大きい場合でも、充分に早い応答性を制御系に与える
ことができ、かつ偏差が小さい場合には、充分な検出精
度を有する伸び率検出方法を提供することを目的とす
る。The present invention has been made to solve such a problem, and can provide a control system with sufficiently fast response even when the deviation between the target value and the actual value of the elongation is large. It is an object of the present invention to provide an elongation rate detecting method having sufficient detection accuracy when the deviation is small.
【００１０】[0010]
【課題を解決するための手段】前記の問題点を解決する
ための手段は、伸び率の単位測定長さを、伸び率目標値
と伸び率測定値との偏差絶対値が大きいときには短く、
偏差絶対値が小さいときには長く変更し、変更された単
位測定長さについて、伸び率を演算することを特徴とす
るものである。[Means for Solving the Problems] A means for solving the above-mentioned problems is to shorten the unit measurement length of the elongation rate when the absolute value of the deviation between the elongation rate target value and the elongation rate measurement value is large,
When the absolute value of deviation is small, it is changed to be long, and the elongation rate is calculated for the changed unit measurement length.
【００１１】[0011]
【作用】伸び率目標値と伸び率測定値との偏差絶対値が
大きいときには、伸び率の単位測定長さが短くされるの
で、伸び率が短い間隔で測定され、応答が早くなる。よ
って、系の無駄時間が短くなるので、伸び率制御系の操
作量を大きくしても（サンプリング制御の場合は出力間
隔を短くしても）、安定した制御を実現することができ
る。この場合には、伸び率の検出精度が低下するが、偏
差が大きい部分では伸び率の検出精度は粗くて差し支え
ない。一方、伸び率目標値と伸び率測定値との偏差絶対
値が小さいときには、伸び率制御系の応答が遅くてもそ
れほど問題にならない。この場合には、伸び率の検出精
度の方が重要視されるが、伸び率の単位測定長さが長く
されるので充分な検出精度が得られる。When the absolute value of deviation between the elongation rate target value and the elongation rate measurement value is large, the unit measurement length of the elongation rate is shortened, so that the elongation rate is measured at short intervals and the response becomes quick. Therefore, since the dead time of the system is shortened, stable control can be realized even if the operation amount of the elongation control system is increased (in the case of sampling control, the output interval is shortened). In this case, the accuracy of detecting the elongation rate is lowered, but the accuracy of detecting the elongation rate may be rough in a portion where the deviation is large. On the other hand, when the absolute value of the deviation between the elongation rate target value and the elongation rate measurement value is small, it does not matter so much even if the response of the elongation rate control system is slow. In this case, the detection accuracy of the elongation rate is more important, but since the unit measurement length of the elongation rate is lengthened, sufficient detection accuracy can be obtained.
【００１２】[0012]
【実施例】以下、本発明の実施例について、図面を用い
て説明する。図１は、本発明の伸び率検出方法および伸
び率制御の系統を示す図である。図１において、帯状物
１は、ロール群４ａ、４ｂ、４ｃからなる入側ブライド
ルロール４と、ロール群５ａ、５ｂ、５ｃからなる出側
ブライドルロール５間で張力を付与されながら、圧延機
のバックアップロール３ａ、３ｂにバックアップされた
ワークロール２ａ、２ｂにて圧延される。圧延機の入側
ブライドルロール４ｃの軸には入側パルス発生装置６が
設けられ、入側パルスカウンタ８はその発生パルスをカ
ウントし、伸び率演算装置１０に入力する。圧延機の出
側ブライドルロール５ａの軸には出側パルス発生装置７
が設けられ、出側パルスカウンタ９はその発生パルスを
カウントし、伸び率演算装置１０に入力する。伸び率演
算装置１０は伸び率εを演算し出力する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an elongation rate detecting method and an elongation rate control system of the present invention. In FIG. 1, the strip 1 is provided with tension between the entrance side bridle roll 4 including the roll groups 4a, 4b, and 4c and the exit side bridle roll 5 including the roll groups 5a, 5b, and 5c. The work rolls 2a and 2b are backed up by the backup rolls 3a and 3b. An entrance-side pulse generator 6 is provided on the shaft of the entrance-side bridle roll 4c of the rolling mill, and the entrance-side pulse counter 8 counts the generated pulses and inputs them to the elongation rate calculation device 10. The output side pulse generator 7 is attached to the shaft of the output side bridle roll 5a of the rolling mill.
Is provided and the output side pulse counter 9 counts the generated pulses and inputs them to the elongation rate calculation device 10. The elongation rate calculation device 10 calculates and outputs the elongation rate ε.
【００１３】該伸び率εと伸び率目標値εaim を伸び率
偏差絶対値演算装置１１に入力する。伸び率偏差絶対値
演算装置１１は、帯状物の材質やサイズ等から定める伸
び率目標値εaim と伸び率測定値εの偏差Δε＝εaim
−εの絶対値Δεabを下記の（１）式から演算し、伸び
率単位測定長さ演算装置１２に入力する。The elongation rate ε and the elongation rate target value ε aim are input to the elongation rate deviation absolute value calculation device 11. The absolute value of the elongation deviation calculation device 11 is a deviation Δε = ε aim between the elongation elongation target value ε aim and the elongation elongation measured value ε determined based on the material and size of the band.
The absolute value Δε ab of −ε is calculated from the following equation (1) and input to the elongation unit measurement length calculating device 12.
【００１４】[0014]
【数１】 [Equation 1]
【００１５】伸び率単位測定長さ演算装置１２は、伸び
率の偏差絶対値Δεabより伸び率単位測定長Ｌを演算
し、伸び率演算装置１０に出力する。The elongation unit measuring length calculating device 12 calculates the elongation unit measuring length L from the deviation absolute value Δε ab of the elongation ratio, and outputs it to the elongation calculating device 10.
【００１６】また、伸び率演算装置１０で演算された伸
び率εと伸び率目標値εaim を伸び率制御装置１３に入
力し、伸び率偏差に応じて圧延機の圧下装置１４や図示
されていない張力制御装置へ信号を入力する。入側ブラ
イドルロール４ｃに取付けられた入側パルス発生装置６
にて発生したパルスカウンタ８で計数し、カウント値Ｎ
E を得る。１回転当たりのパルス数をＰE 、ロール径を
ＤE 、伸び率測定長をＬとすると、ＮE は、下記の
（２）式で表される。Further, the elongation rate ε and the elongation rate target value ε aim calculated by the elongation rate calculating apparatus 10 are input to the elongation rate control apparatus 13, and the rolling mill rolling apparatus 14 and the drawing are shown according to the elongation rate deviation. Input a signal to the tension control device. Entrance side pulse generator 6 attached to entrance side bridle roll 4c
Is counted by the pulse counter 8 generated in
Get E. When the number of pulses per rotation is P E , the roll diameter is D E , and the elongation measurement length is L, N E is represented by the following equation (2).
【００１７】 ＮE ＝（Ｌ／πＤE ）×ＰE ・・・（２）式 一方、この間に出側ブライドルロール５ａに取付けられ
た出側パルス発生装置７にて発生したパルスをカウンタ
９で計数し、カウント値ＮD を得る。一回転あたりのパ
ルス数をＰD 、ロール径をＤD とすると、その間に通過
した帯状物長さＬD は、下記の（３）式で表される。N E = (L / πD E ) × P E (2) Formula On the other hand, during this time, the counter 9 generates the pulse generated by the output side pulse generator 7 attached to the output side bridle roll 5 a. Count to obtain the count value N D. Assuming that the number of pulses per rotation is P D and the roll diameter is D D , the length L D of the belt-shaped material passing between them is represented by the following formula (3).
【００１８】 ＬD ＝π×ＤD ×（ＮD ／ＰD ） ・・・（３）式 伸び率εの演算はＬに対応するＮE を検出する毎に行う
のが一般的である。このとき伸び率εは、下記の（４）
式で表される。L D = π × D D × (N D / P D ) (3) Equation (3) The elongation ε is generally calculated every time N E corresponding to L is detected. At this time, the elongation rate ε is defined by the following (4)
It is represented by a formula.
【００１９】 ε＝（ＬD −Ｌ）／Ｌ＝（ＬD ／Ｌ）−１ ・・・（４）式 したがって、εは、（２）式〜（４）式から下記の
（５）式で表される。Ε = (L D −L) / L = (L D / L) −1 (4) Equation (4) Therefore, ε is expressed by the following equation (5) from equations (2) to (4). It is represented by.
【００２０】 ε＝（ＬD ／Ｌ）−１ ＝｛πＤD ×（ＮD ／ＰD ）｝／｛πＤE ×（ＮE ／ＰE ）｝−１ ＝（ＤD ／ＤE ）×（ＮD ／ＮE ）×（ＰE ／ＰD ）−１ ・・・（５）式 伸び率制御系の応答性を向上させるためには、伸び率測
定長Ｌを極力短くすれば良い。なぜなら、伸び率εの演
算結果をより早く知ることができ、圧延機の圧下装置１
４など伸び率制御アクチェータへの出力ピッチを短くで
き、伸び率制御の応答性向上が図られるためである。Ε = (L D / L) −1 = {πD D × (N D / P D )} / {πD E × (N E / P E )} − 1 = (D D / D E ) × (N D / N E ) × (P E / P D ) −1 (5) Equation In order to improve the responsiveness of the elongation control system, the elongation measurement length L may be made as short as possible. Because the calculation result of the elongation rate ε can be known earlier, the rolling mill 1
This is because the output pitch to the elongation control actuator such as 4 can be shortened and the response of the elongation control can be improved.
【００２１】しかし、前記の（５）式からわかるように
伸び率測定値Ｌを短くすると、ＮEおよびＮD の値自体
が小さくなって、ＮE および／もしくはＮD の読み取り
誤差（１パルスのカウントミス）の影響が伸び率εの精
度を大きく左右することになる。However, as can be seen from the above equation (5), when the elongation rate measured value L is shortened, the values of N E and N D themselves become small, and the reading error of N E and / or N D (1 pulse) The effect of (count error of) greatly affects the accuracy of the elongation rate ε.
【００２２】ところで、伸び率偏差絶対値Δεabが大き
な場合、伸び率偏差絶対値の非常に小さなレベルの状態
で要求される伸び率εの検出精度がなくても制御上問題
とならない。すなわち、伸び率偏差の値自体の精度が確
保できる範囲で伸び率偏差絶対値Δεabが大きな場合、
伸び率測定長Ｌを変更すればパルス数の小さな安価なパ
ルス発生装置においても合理的に応答性を高めることが
でき、伸び率偏差絶対値Δεabをより早く小さなものに
することが可能となる。By the way, when the absolute value of the elongation percentage deviation Δε ab is large, there is no control problem even if the accuracy of detecting the elongation percentage ε required in the state where the absolute value of the elongation percentage deviation is extremely small is not present. That is, when the absolute value of the elongation percentage deviation Δε ab is large within a range where the accuracy of the elongation percentage deviation itself can be secured,
By changing the elongation rate measurement length L, the responsiveness can be reasonably improved even in an inexpensive pulse generator having a small number of pulses, and the elongation rate deviation absolute value Δε ab can be made smaller quickly. .
【００２３】この場合の伸び率測定長Ｌの設定方法の一
例を以下に説明する。この例においては、伸び率偏差絶
対値Δεabに対する伸び率測定長Ｌの設定は、伸び率偏
差絶対値Δεabのａ（が例えば０．０５〜０．５）倍以
下の伸び率検出（測定）誤差となるように、後記する
（９）式で伸び率測定長Ｌを設定している。An example of a method of setting the elongation measurement length L in this case will be described below. In this example, the elongation rate measurement length L with respect to the absolute value of the elongation rate deviation Δε ab is set by detecting the elongation rate of a (or, for example, 0.05 to 0.5) times the elongation rate deviation absolute value Δε ab or less. ) The elongation measurement length L is set by the equation (9) described later so as to cause an error.
【００２４】ここで、出側ブライドルロールに設置した
出側パルス発生装置７で１パルスカウントミスが発生し
た場合を想定すれば、見掛けの出側通過長さＬD'は、下
記の（６）式で表される。Here, assuming that a one-pulse count error occurs in the output-side pulse generator 7 installed on the output-side bridle roll, the apparent output-side passage length L D ' is given by the following (6). It is represented by a formula.
【００２５】 ＬD'＝πＤD ×｛( ＮD ＋１）／ＰD ｝ ・・・（６）式 したがって、この場合の見掛けの伸び率ε’は前記の
（４）式と同様にして、下記の（７）式で表される。L D ′ = πD D × {(N D +1) / P D } ... (6) Therefore, the apparent elongation ε ′ in this case is calculated by the same equation (4) as above. It is expressed by the following equation (7).
【００２６】 ε’＝（ＬD'−Ｌ）／Ｌ ・・・（７）式 伸び率検出誤差ａはε’−εで求められる。この伸び率
検出誤差ａを、伸び率偏差絶対値Δεabのａ倍以下とな
るようするには、下記の（８）式を満足する必要があ
る。[0026] ε '= (L D' -L ) / L ··· (7) type growth rate detection error a is obtained by ε'-ε. In order to make the elongation rate detection error a equal to or less than the elongation rate deviation absolute value Δε ab times, it is necessary to satisfy the following expression (8).
【００２７】 ａ×Δεab≧ε’−ε ・・・（８）式 したがって、（４）式、（７）式、（８）式から、伸び
率測定長Ｌを求めると、下記の（９）式で表される。A × Δε ab ≧ ε′−ε Equation (8) Therefore, when the elongation measurement length L is calculated from the equations (4), (7) and (8), the following (9) ) Is represented by the formula.
【００２８】 ａ×Δεab≧｛（ＬD'−Ｌ）／Ｌ｝−｛（ＬD −Ｌ）／Ｌ｝ ∴ Ｌ≧（１／ａ）×（πＤD ／ＰD ）×（１／Δεab）・・・（９）式 上記のような方法で伸び率測定長Ｌを伸び率偏差絶対値
Δεabに応じて変更した場合の応答性の向上の度合を、
検出誤差ａが１０％と２０％の場合について図２に破線
で示す。[0028] a × Δε ab ≧ {(L D '-L) / L} - {(L D -L) / L} ∴ L ≧ (1 / a) × (πD D / P D) × (1 / Δε ab ) ... Formula (9) The degree of improvement in responsiveness when the elongation rate measurement length L is changed according to the elongation rate deviation absolute value Δε ab by the method as described above,
A case where the detection error a is 10% and 20% is shown by a broken line in FIG.
【００２９】従来技術の応答性を１．０とし、即ちＬ＝
Ｌ0 と定義し、相対評価（応答性をＬ0 ／Ｌで定義）を
した場合、伸び率偏差絶対値に対する検出誤差ａを例え
ば１０％〜２０％の範囲内に収まるように伸び率測定長
Ｌを設定した１例を図２における実線で示す。図２にお
いて、伸び率偏差絶対値Δεabが0.10％以下の場合に
は、従来例と同じように伸び率測定長ＬをＬ0 とする。
Δεabが0.10％を越えて0.15％以下の場合は、伸び率測
定長Ｌを5.58ｍとする。Δεabが0.15％を越えて0.20％
以下の場合は、伸び率測定長Ｌを４ｍとする。Δεabが
0.20％を越えて0.275 ％以下の場合は、伸び率測定長Ｌ
を３ｍとする。Δεabが0.275 ％を越える場合は、伸び
率測定長Ｌを２ｍとする。このようにすれば、検出誤差
の伸び率偏差絶対値Δεabに対する割合は、図２に示す
10％と20％の点線の間に入る。そして、応答性を示すＬ
0 ／Ｌは、伸び率偏差絶対値Δεabの増大と共に増加す
る。The response of the prior art is set to 1.0, that is, L =
When L 0 is defined and relative evaluation (responsiveness is defined by L 0 / L) is performed, the elongation measurement length is set so that the detection error a with respect to the absolute value of the elongation deviation is within the range of 10% to 20%. An example in which L is set is shown by the solid line in FIG. In FIG. 2, when the absolute value of elongation deviation Δε ab is 0.10% or less, the elongation measurement length L is set to L 0 as in the conventional example.
When Δε ab exceeds 0.10% and is 0.15% or less, the elongation measurement length L is set to 5.58 m. Δε ab exceeds 0.15% and 0.20%
In the following cases, the elongation measurement length L is 4 m. Δε ab
If more than 0.20% and less than 0.275%, elongation measurement length L
Is 3 m. When Δε ab exceeds 0.275%, the elongation measurement length L is set to 2 m. By doing so, the ratio of the detection error to the absolute value of the elongation deviation Δε ab is shown in FIG.
Enter between the 10% and 20% dotted lines. Then, L indicating responsiveness
0 / L increases with an increase in the absolute value of elongation deviation Δε ab .
【００３０】本発明は帯状物に限定せず、形、条材、線
材などにも適用出来るものである。板厚１．０ｍｍ、板
幅１，００７ｍｍの冷延鋼板について、ライン速度２０
０ｍｐｍ、圧延機入側張力および出側張力一定の条件
で、通常の伸び率制御をかけながら圧延し、圧延途中で
伸び率目標値を１．４％から１．０％に変更した。圧延
に際して、本発明例では、図１に示す装置を用いて、図
２の伸び率偏差絶対値Δεab−伸び率測定長Ｌ線図の図
中に表示される本発明の線図に従って、伸び率偏差絶対
値Δεabに応じて伸び率の単位測定長Ｌを変更しながら
圧延した。伸び率変更前後における圧延荷重の測定値、
伸び率測定値をそれぞれ図３の（ａ）、（ｂ）に示す。
図３には、比較のために伸び率の単位測定長Ｌを一定の
条件で圧延した従来技術の例を示す。The present invention is not limited to strips, but can be applied to shapes, strips, wires and the like. Line speed of 20 for cold-rolled steel sheet with 1.0 mm thickness and 1,007 mm width
Rolling was carried out under the conditions of 0 mpm, the tension on the side of the rolling mill and the tension on the side of exit of the rolling mill while applying ordinary elongation control, and the target elongation rate was changed from 1.4% to 1.0% during rolling. At the time of rolling, in the example of the present invention, by using the apparatus shown in FIG. 1, the elongation percentage deviation absolute value Δε ab -elongation rate measurement length according to the diagram of the present invention displayed in the L-line diagram in FIG. Rolling was performed while changing the unit measurement length L of the elongation rate according to the absolute value Δε ab of the rate deviation. Measured value of rolling load before and after elongation change,
The measured elongation percentages are shown in FIGS. 3 (a) and 3 (b), respectively.
For comparison, FIG. 3 shows an example of a conventional technique in which a unit measurement length L of elongation is rolled under constant conditions.
【００３１】本発明例によるものは従来技術の例による
ものに比べて、伸び率変更タイミング直後での圧延機の
荷重変更量が大きくなり、結果として伸び率εが伸び率
目標値εaim へ早く収束している。In the example of the present invention, the amount of load change of the rolling mill immediately after the elongation rate change timing becomes large as compared with the example of the prior art, and as a result, the elongation rate ε reaches the elongation rate target value ε aim earlier. It has converged.
【００３２】前記の本発明の実施例は前後にブライドル
ロールを配置した圧延機についての場合であるが、前後
にブライドルロールを配置したテンションレベラーの場
合についても同様に本発明を適用することができる。The above-mentioned embodiment of the present invention is a case of a rolling mill having bridle rolls arranged at the front and rear, but the present invention can be similarly applied to a case of a tension leveler having bridle rolls arranged at the front and rear. .
【００３３】また、ピンチローラ、ローラによる測長方
式の各種のラインにも適用可能である。他に、調質圧延
機、矯正、伸線、磨き加工、押出加工など伸び率を速や
かに所定の値の範囲内に入れるための各種のプロセスに
適用可能である。Further, the present invention can be applied to various lines such as a pinch roller and a length measuring system using rollers. In addition, it can be applied to various processes such as temper rolling, straightening, wire drawing, polishing, extrusion, and the like to quickly set the elongation rate within a predetermined value range.
【００３４】[0034]
【発明の効果】本発明によれば、安価な伸び率検出装置
で伸び率検出精度を確保しながら、伸び率制御の目標値
に対する伸び率測定値の偏差が大きな時の応答性を格段
に高めることができ、伸び率不良部長さを大幅に短縮で
きる。また、伸び率偏差絶対値が小さな場合、ライン速
度の高低にかかわらず伸び率検出精度を十分に確保で
き、製品品質保証に寄与できる。According to the present invention, the responsiveness when the deviation of the measured elongation rate from the target value of the elongation rate control is significantly increased while ensuring the accuracy of the elongation rate detection with the inexpensive elongation rate detecting device. It is possible to significantly reduce the length of the defective elongation portion. In addition, when the absolute value of the elongation deviation is small, it is possible to sufficiently secure the accuracy of the elongation detection regardless of the line speed, which contributes to the product quality assurance.
【図１】本発明の伸び率検出および伸び率制御の系統を
示す概略図である。FIG. 1 is a schematic diagram showing a system of elongation rate detection and elongation rate control according to the present invention.
【図２】本発明の伸び率測定長の設定方法および応答性
を説明する図である。FIG. 2 is a diagram illustrating a method of setting an elongation measurement length and responsiveness of the present invention.
【図３】本発明および従来技術で伸び率目標値を変更し
た時の応答性を示すチャートである。FIG. 3 is a chart showing responsiveness when the target value of the elongation percentage is changed in the present invention and the prior art.
１ 帯状物 ２ａ、２ｂ ワークロール ３ａ、３ｂ バックアップロール ４ａ、４ｂ、４ｃ 入側ブライドルロール ５ａ，５ｂ，５ｃ 出側ブライドルロール ６ 入側パルス発生装置 ７ 出側パルス発生装置 ８ 入側パルスカウンタ ９ 出側パルスカウンタ １０ 伸び率演算装置 １１ 伸び率偏差絶対値演算装置 １２ 伸び率単位測定長さ演算装置 １３ 伸び率制御装置 １４ 圧延機圧下装置 1 band 2a, 2b work roll 3a, 3b backup roll 4a, 4b, 4c entrance side bridle roll 5a, 5b, 5c exit side bridle roll 6 entrance side pulse generator 7 exit side pulse generator 8 entrance side pulse counter 9 exit Side pulse counter 10 Elongation rate calculation device 11 Elongation ratio deviation absolute value calculation device 12 Elongation ratio unit measurement length calculation device 13 Elongation ratio control device 14 Rolling mill reduction device
Claims (1)
位測定長さを、伸び率目標値と伸び率測定値との偏差絶
対値が大きいときには短く、偏差絶対値が小さいときに
は長く変更し、変更された単位測定長さについて、伸び
率を演算することを特徴とする伸び率演算方法。1. When detecting the elongation rate, the unit measurement length of the elongation rate is changed to be short when the absolute value of the deviation between the elongation rate target value and the measured elongation rate is short, and long when the absolute value of the deviation is small. An elongation rate calculation method, wherein an elongation rate is calculated for a changed unit measurement length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7055450A JP2959426B2 (en) | 1995-03-15 | 1995-03-15 | Elongation rate calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7055450A JP2959426B2 (en) | 1995-03-15 | 1995-03-15 | Elongation rate calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08252620A true JPH08252620A (en) | 1996-10-01 |
| JP2959426B2 JP2959426B2 (en) | 1999-10-06 |
Family
ID=12998947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7055450A Expired - Fee Related JP2959426B2 (en) | 1995-03-15 | 1995-03-15 | Elongation rate calculation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2959426B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007108036A (en) * | 2005-10-14 | 2007-04-26 | Nippon Steel Corp | Extension coefficient measurement device for steel plate and extension coefficient measurement method |
| JP2008110377A (en) * | 2006-10-31 | 2008-05-15 | Nippon Steel Corp | Method and device for measuring elongation percentage of metallic sheet |
| CN102641900A (en) * | 2010-12-01 | 2012-08-22 | 上海宝信软件股份有限公司 | Temper mill elongation control method and control equipment |
-
1995
- 1995-03-15 JP JP7055450A patent/JP2959426B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007108036A (en) * | 2005-10-14 | 2007-04-26 | Nippon Steel Corp | Extension coefficient measurement device for steel plate and extension coefficient measurement method |
| JP4564438B2 (en) * | 2005-10-14 | 2010-10-20 | 新日本製鐵株式会社 | Steel sheet elongation measuring apparatus and elongation measuring method |
| JP2008110377A (en) * | 2006-10-31 | 2008-05-15 | Nippon Steel Corp | Method and device for measuring elongation percentage of metallic sheet |
| CN102641900A (en) * | 2010-12-01 | 2012-08-22 | 上海宝信软件股份有限公司 | Temper mill elongation control method and control equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2959426B2 (en) | 1999-10-06 |
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