JPH0126768B2 - - Google Patents
Info
- Publication number
- JPH0126768B2 JPH0126768B2 JP58051452A JP5145283A JPH0126768B2 JP H0126768 B2 JPH0126768 B2 JP H0126768B2 JP 58051452 A JP58051452 A JP 58051452A JP 5145283 A JP5145283 A JP 5145283A JP H0126768 B2 JPH0126768 B2 JP H0126768B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- reaction force
- predicted
- mill
- 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.)
- Expired
Links
- 238000005096 rolling process Methods 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000009467 reduction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 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
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】 本発明は圧延機の厚み制御方法に関する。[Detailed description of the invention] The present invention relates to a method for controlling thickness of a rolling mill.
従来の圧延機における厚み制御装置においては
相対値AGCと絶対値AGCとがある。本発明はこ
の絶対値AGCに関するものである。 Conventional thickness control devices in rolling mills include relative value AGC and absolute value AGC. The present invention relates to this absolute value AGC.
相対値AGCは板がかみ込んだのちのある板厚
を基準として板厚変動を小さくする制御である。
これに対し、絶対値AGCは目標板厚を圧延前の
ロールギヤツプと一致させ、目標板厚を得るため
材料噛み込み後のロールギヤツプを圧延前の値と
同じになるように圧延反力にミルの伸び分だけ圧
下機構にて補正する制御方式である。 Relative value AGC is a control that reduces plate thickness fluctuations based on a certain plate thickness after the plate has bitten.
On the other hand, with absolute value AGC, the target plate thickness is made to match the roll gap before rolling, and in order to obtain the target plate thickness, the rolling reaction force is applied to the mill elongation so that the roll gap after material bite is the same as the value before rolling. This is a control method in which the reduction mechanism corrects the amount by the amount.
従来の絶対値AGCは材料がロールに噛みこん
だ瞬間に圧延反力は、非常に短かい時間に一気に
立ち上がり、これに応答してミルの伸びｘも立ち
あがる。ミルの伸びｘに対応する制御量をx0とす
る。ミル定数をＫ、圧延反力Ｐとすると、制御量
x0はx0＝Ｐ／Ｋ・SFである。SFはスケールフアク
ターで０＜SF＜１の任意の値である。板厚はSF
の値が大きいほど目標板厚に近ずくが制御は不安
定になりやすい。SF＝１のときx0＝ｘとなる。
現実には、SF＝１とした場合制御は不能となる
ので実際は、これより小さい値となる。 In the conventional absolute value AGC, the rolling reaction force rises all at once in a very short time at the moment the material is bitten by the roll, and in response, the elongation x of the mill also rises. Let x 0 be the control amount corresponding to the mill elongation x. When the mill constant is K and the rolling reaction force P, the control amount is
x 0 is x 0 =P/K·SF. SF is a scale factor and is an arbitrary value of 0<SF<1. Board thickness is SF
The larger the value, the closer to the target plate thickness, but the control tends to become unstable. When SF=1, x 0 =x.
In reality, control becomes impossible when SF=1, so the actual value is smaller than this.
この制御量x0を短い時間で補正しなければオフ
ゲージが増える。しかし、実際にミルの伸び分に
対応する制御量x0をたとえば油圧々下装置にてこ
れを補なうおうとすると、材料の噛み込み時のた
めだけに、非常に大きな容量の油圧装置が必要と
なり、不経済かつ非現実的である。また一気にx0
だけロールギヤツプを変化させると、材料が蛇行
する等、圧延が不安定となる。本発明はこれらの
不具合点をなくすことを目的としたものでありそ
の要旨は、圧延前に圧延反力を予測しロールギヤ
ツプの設定値は予測圧延反力に相当するミルの伸
び分（予測値）だけあらかじめロールギヤツプを
しめこんでおき、材料がロールに噛みこんだ直後
にAGCの動作より圧延反力に比例した量だけロ
ールギヤツプをしめ込む。それと同時に予測圧延
反力に相当するAGC動作をキヤンセルし、結果
的にAGC動作量を予測荷重と実際の荷重との差
に比例した量だけにすることを特徴とする厚み制
御方法である。 If this control amount x 0 is not corrected in a short period of time, off-gauge will increase. However, if you try to actually compensate for the control amount x 0 corresponding to the elongation of the mill with a hydraulic lowering device, you will need a hydraulic device with a very large capacity just for when the material is biting. This is uneconomical and unrealistic. x 0 again at once
If the roll gap is changed by a certain amount, rolling becomes unstable, such as the material meandering. The purpose of the present invention is to eliminate these problems, and its gist is that the rolling reaction force is predicted before rolling, and the set value of the roll gap is determined by the elongation of the mill (predicted value) corresponding to the predicted rolling reaction force. The roll gap is tightened in advance, and immediately after the material is bitten into the roll, the AGC operation tightens the roll gap by an amount proportional to the rolling reaction force. At the same time, this thickness control method is characterized in that the AGC operation corresponding to the predicted rolling reaction force is canceled, and as a result, the AGC operation amount is reduced to an amount proportional to the difference between the predicted load and the actual load.
次に図面を用いて詳細に説明する。 Next, a detailed explanation will be given using the drawings.
第１図と第２図に本発明の実施例を示す。 Embodiments of the present invention are shown in FIGS. 1 and 2.
第１図において、Ｐはロードセル等により実際
に得られる圧延反力である。P0は予測される圧
延反力であり、計算機等にあらかじめ計算式を作
成しておき自動的にインプツトされるようにして
おくと便利である。 In FIG. 1, P is a rolling reaction force actually obtained by a load cell or the like. P 0 is the predicted rolling reaction force, and it is convenient to create a calculation formula in advance on a computer or the like so that it can be input automatically.
Ｋはミル定数、SFはスケールフアクタであり、
４の演算増幅器の出側での指令値ｘは
ｘ＝（Ｐ−P0）×SF／Ｋ
で表わされる。この値が本発明の制御によるラム
の動作量である。 K is Mill's constant, SF is the scale factor,
The command value x at the output side of the operational amplifier No. 4 is expressed as x=(P-P 0 )×SF/K. This value is the amount of ram operation controlled by the present invention.
５は本制御をONまたはOFFするスイツチであ
り、手動でも自動でもよい。 5 is a switch for turning on or off this control, which may be manual or automatic.
６は沈み込み補正制御機構である。沈み込み補
正制御とは板が、かみ込んだ直後にラムが油の弾
性により沈み込み、沈み込んだ位置でラム位置を
安定させる制御である。 6 is a sinking correction control mechanism. Sinking correction control is a control in which the ram sinks due to the elasticity of the oil immediately after the plate is bitten, and the ram position is stabilized at the sunken position.
この補正量をＬであらわす。この制御は直接本
発明とは関係ない。 This correction amount is represented by L. This control is not directly related to the present invention.
７はタイミングスイツチである。材料がロール
にかみ込んでいる間だけONとなるスイツチであ
る。つまりメタルインでONしてメタルオフで
OFFになるスイツチである。 7 is a timing switch. This switch is ON only while the material is biting into the roll. In other words, it is turned on when metal is in, and when metal is turned off.
This is a switch that turns OFF.
８はラムの設定基準器であり、φはラムの設定
基準値である。 8 is a ram setting reference device, and φ is a ram setting reference value.
９はサーボバルブアンプ、１０はサーボバル
ブ、１１はシリンダー、１２はラムである。１０
のサーボバルブアンプへの指令値x0＝φ＋
（Ｐ−P0）×SF／Ｋ−Ｌである。本発明の簡易実施例
を示す。１３の演算増幅器の出側での指令値x1＝
Ｐ×SF／Ｋで表わされる。 9 is a servo valve amplifier, 10 is a servo valve, 11 is a cylinder, and 12 is a ram. 10
Command value to the servo valve amplifier x 0 =φ+
(P−P 0 )×SF/K−L. A simple embodiment of the invention is shown. Command value at the output side of No. 13 operational amplifier x 1 =
It is expressed as P×SF/K.
１４は計算機（プロセスコントローラ）であ
り、ここでラム設定基準値φ、予測圧延反力P0、
沈み込み補正量Ｌをもちいてサーボバルブ１０へ
の指令値ｙ＝φ−（Ｌ＋SF×P0／Ｋ）を出力する。 14 is a computer (process controller), which calculates the ram setting reference value φ, predicted rolling reaction force P 0 ,
Using the sinking correction amount L, a command value y=φ−(L+SF×P 0 /K) to the servo valve 10 is output.
サーボバルブ１０への指令値x2は x2＝Ｐ×SF／Ｋ＋φ−（Ｌ＋P0×SF／Ｋ） ＝φ＋（Ｐ−P0）SF／Ｋ−Ｌ である。第１図の値と一致する。The command value x2 to the servo valve 10 is x2 =P×SF/K+φ−(L+ P0 ×SF/K)=φ+(P− P0 )SF/K−L. This corresponds to the value shown in FIG.
１５はメタルイン、メタルオフを示すタイミン
グ信号である。 15 is a timing signal indicating metal-in and metal-off.
この簡易実施例のメリツトはAGCのアナログ
回路が比例のみで簡単である点である。ただし計
算機がSF／Ｋの値を知つておくことが必要である。 The advantage of this simple embodiment is that the AGC analog circuit is simple and consists only of proportionality. However, it is necessary for the computer to know the value of SF/K.
第３図は簡易実施例を行なつた場合の計算機か
らサーボバルブへの位置指令値を示したものであ
る。縦軸の正の方向がロールギヤツプをしめ込む
方向である。その他変形も考えられるが要は絶対
値AGCを行う場合にラムの動きが実圧延反力と
予測圧延反力の差をミル定数Ｋでわたつた値に比
例する量だけしかうごかないように構成すること
が本発明の本質である。 FIG. 3 shows the position command value sent from the computer to the servo valve in a simple embodiment. The positive direction of the vertical axis is the direction in which the roll gap is tightened. Other modifications are possible, but the point is that when performing absolute value AGC, the ram is configured so that it only moves by an amount proportional to the difference between the actual rolling reaction force and the predicted rolling reaction force, which is the value passed by the mill constant K. This is the essence of the present invention.
第４図に本発明の効果を示す。 FIG. 4 shows the effects of the present invention.
図はラムの動きを示している。縦軸の正の方向
がロールギヤツプをしめ込む方向である。この場
合は予測圧延反力によるロールギヤツプのしめ込
み分は、圧下スクリユーにて、しめこんでいる。
また、沈み込み補正は行なつていないものとす
る。つまりＬ＝０である。本発明の制御方法を行
なわない場合には、ラムはＡ線のように非常に大
きな動きを示す。 The diagram shows the movement of the ram. The positive direction of the vertical axis is the direction in which the roll gap is tightened. In this case, the amount of tightening of the roll gap due to the predicted rolling reaction force is tightened by the reduction screw.
It is also assumed that no subsidence correction has been performed. That is, L=0. If the control method of the present invention is not carried out, the ram will exhibit a very large movement as shown by line A.
Ｂ、Ｃ線は、本発明の制御を行なつた場合を示
す。Ｂ線においてa0は予測圧延反力が実圧延反力
との差によつて生じたもので、予測値圧延反力が
a0×Ｋ／SFだけ小さかつたことを示す。 Lines B and C show the case where the control of the present invention is performed. In line B, a 0 is caused by the difference between the predicted rolling reaction force and the actual rolling reaction force, and the predicted rolling reaction force is
It shows that it is smaller by a 0 ×K/SF.
予測圧延反力が実圧延反力と一致すれば、Ｃ線
のようにラムはほとんど動かない。 If the predicted rolling reaction force matches the actual rolling reaction force, the ram hardly moves as shown in line C.
したがつて絶対値AGCの目的を満足し材料の
蛇行のない安定した圧延が可能となり、油圧ユニ
ツトの容量も従来に比較して非常に小くできる効
果がある。 Therefore, the purpose of absolute value AGC is satisfied, stable rolling without meandering of the material is possible, and the capacity of the hydraulic unit can also be made much smaller than in the past.
第１図と第２図は本発明の実施例のブロツク図
を示す。第３図は第２図の実施例における計算機
の位置指令を示している。第４図は、本発明の効
果を示すラムの動きをあらわしたものである。
１……ロードセル等による実際の圧延反力検出
器、２……計算機等の予測圧延反力の外部入力信
号器、３……演算増幅器、４……演算増幅器、５
……AGCをON、OFFするスイツチ、６……沈
み込み補正値の外部入力信号器、７……タイミン
グスイツチ、８……ラム設定基準器、９……サー
ボバルブアンプ、１０……サーボバルブ、１１…
…圧下装置（油圧シリンダー）、１２……ラム、
１３……演算増幅器、１４……計算機（プロセス
コントローラー）、１５……メタルイン、メタル
オフのタイミングスイツチ。
1 and 2 show block diagrams of embodiments of the invention. FIG. 3 shows the position command of the computer in the embodiment of FIG. FIG. 4 shows the movement of the ram showing the effect of the present invention. 1... Actual rolling reaction force detector using a load cell etc., 2... External input signal device for predicted rolling reaction force such as a computer, 3... Operational amplifier, 4... Operational amplifier, 5
...Switch for turning AGC ON and OFF, 6 ... External input signal device for sinking correction value, 7 ... Timing switch, 8 ... Ram setting reference device, 9 ... Servo valve amplifier, 10 ... Servo valve, 11...
... Reduction device (hydraulic cylinder), 12... Ram,
13...Operation amplifier, 14...Computer (process controller), 15...Metal-in, metal-off timing switch.
Claims (1)
延機において圧延反力とミル定数を用い、圧延荷
重をミル定数でわつた値に１より小さいスケール
フアクタをかけた量だけロールギヤツプを操作し
て目標板厚を得る絶対値AGCを行うに際し、圧
延前に圧延反力を予測し、この予測圧延反力に相
当するミルの伸び予測値だけ、あらかじめロール
ギヤツプをしめこんでおき、AGC動作を開始す
ると同時に予測圧延反力に相当するAGC動作分
をキヤンセルし、AGC動作量を予測荷重と実際
の荷重との差に比例した量だけにすることを特徴
とする圧延機の厚み制御方法。1. In a rolling mill that controls material thickness by giving a target thickness value, use the rolling reaction force and mill constant to operate the roll gap by an amount equal to the rolling load divided by the mill constant multiplied by a scale factor smaller than 1. When performing absolute value AGC to obtain the target plate thickness, the rolling reaction force is predicted before rolling, the roll gap is tightened in advance by the predicted elongation value of the mill corresponding to this predicted rolling reaction force, and the AGC operation is performed. A thickness control method for a rolling mill characterized by canceling an AGC operation corresponding to a predicted rolling reaction force at the same time as rolling starts, and reducing the AGC operation amount to only an amount proportional to the difference between the predicted load and the actual load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58051452A JPS59178117A (en) | 1983-03-29 | 1983-03-29 | Method for controlling sheet thickness in rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58051452A JPS59178117A (en) | 1983-03-29 | 1983-03-29 | Method for controlling sheet thickness in rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178117A JPS59178117A (en) | 1984-10-09 |
| JPH0126768B2 true JPH0126768B2 (en) | 1989-05-25 |
Family
ID=12887319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58051452A Granted JPS59178117A (en) | 1983-03-29 | 1983-03-29 | Method for controlling sheet thickness in rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178117A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5561311A (en) * | 1978-10-31 | 1980-05-09 | Kawasaki Steel Corp | Method and apparatus for controlling sheet thickness |
| JPS59159212A (en) * | 1983-03-01 | 1984-09-08 | Ishikawajima Harima Heavy Ind Co Ltd | Sheet thickness controlling method in rolling mill |
-
1983
- 1983-03-29 JP JP58051452A patent/JPS59178117A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5561311A (en) * | 1978-10-31 | 1980-05-09 | Kawasaki Steel Corp | Method and apparatus for controlling sheet thickness |
| JPS59159212A (en) * | 1983-03-01 | 1984-09-08 | Ishikawajima Harima Heavy Ind Co Ltd | Sheet thickness controlling method in rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59178117A (en) | 1984-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR960003368B1 (en) | Process control system | |
| US4760723A (en) | Elongation control system | |
| JPH0126768B2 (en) | ||
| US4016735A (en) | Range control for an automatic gauge control system of a rolling mill | |
| JP3243296B2 (en) | Hydraulic rolling device for rolling mill | |
| ES486048A1 (en) | Automatic gauge control method and apparatus for tandem strip mills | |
| JP2788328B2 (en) | Automatic thickness control device for reversible cold rolling mill | |
| KR860001365A (en) | Process control unit | |
| JPS5514136A (en) | Control unit for rolling of steel bar product | |
| JPS5645204A (en) | Controlling method for sheet crown | |
| JPH0667522B2 (en) | Automatic shape control method for rolling mill | |
| JPS53108057A (en) | Method and apparatus for tension control in tandem rolling mill | |
| JPS56117816A (en) | Controller for interstand tension for continuous rolling mill | |
| JPS6192716A (en) | Rolling reduction control method of thick plate rolling mill | |
| SU1215782A1 (en) | Arrangement for automatic adjustment of periodic rolling stand | |
| JPS54160547A (en) | Control of plate thickness and shape in continuous rolling mill | |
| JPS5694006A (en) | Speed control device for fluid pressure cylinder in fluid pressure system | |
| JPS57149014A (en) | Method for preventing steel sheet from cambering and rolling mill used therefor | |
| JPS5976612A (en) | Hydraulic controlling device of rolling mill | |
| JPH0815607B2 (en) | Plate thickness control method for steel strip rolling mill | |
| JPS55158866A (en) | Mold level control method | |
| JPS6050523B2 (en) | Speed compensation device when rolled material is caught in a rolling mill | |
| SU1608619A1 (en) | Device for determining gain factor of controlled object | |
| JPS54141360A (en) | Controller for thickness of sheet | |
| JPS5732816A (en) | Controlling method for screw down device of vertical rolling mill |