JPH0324283B2 - - Google Patents
Info
- Publication number
- JPH0324283B2 JPH0324283B2 JP59175744A JP17574484A JPH0324283B2 JP H0324283 B2 JPH0324283 B2 JP H0324283B2 JP 59175744 A JP59175744 A JP 59175744A JP 17574484 A JP17574484 A JP 17574484A JP H0324283 B2 JPH0324283 B2 JP H0324283B2
- Authority
- JP
- Japan
- Prior art keywords
- width
- tension
- rolling
- rolled
- stands
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 39
- 238000005096 rolling process Methods 0.000 claims description 31
- 238000003079 width control Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing 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
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/06—Width
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
- B21B2265/06—Interstand tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
- B21B41/08—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters without overall change in the general direction of movement of the work
- B21B41/10—Loop deflectors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はフイードフオワード制御方式を用いた
タンデム圧延機の板巾制御に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to strip width control of a tandem rolling mill using a feed forward control system.
（発明の技術的背景とその問題点）
鋼板等の被圧延材における板巾の均一化は極め
て重要な品質要求であるためにもかかわらず、従
来のフイードバツク制御方式を用いた板巾の自動
制御装置はなお十分な効果を得ていないことはよ
く知られている。ここで、フイードバツク制御方
式とは、板巾計で検出された板巾検出値と目標板
巾値との板巾偏差値に基き、比例積分制御により
上流側の圧延スタンド間張力の調整を行う制御方
式をいう。特に、スキツドマーク等に起因する板
巾変動に対しては、従来のフイードバツク制御方
式の上記制御で対処することは制御応答上困難で
あるという問題点があつた。(Technical background of the invention and its problems) Even though the uniformity of the width of rolled materials such as steel plates is an extremely important quality requirement, automatic control of the width of the sheet using the conventional feedback control method has not been possible. It is well known that the device is still not fully effective. Here, the feedback control method is a control that adjusts the tension between upstream rolling stands using proportional-integral control based on the strip width deviation value between the strip width detection value detected by the strip width meter and the target strip width value. Refers to the method. In particular, there has been a problem in that it is difficult to deal with variations in board width caused by skid marks or the like using the above-mentioned control of the conventional feedback control system in terms of control response.
そこで、フイードフオワード方式の板巾制御が
望まれていた。ところが、被圧延機の受ける張力
を制御することにより板巾の制御が可能であると
いう事は公知であるが、しかしフイードフオワー
ド制御を行う場合、巾変形がロールギヤツプで生
ずるのか、或はロールギヤツプ以外の所で生ずる
のか、また巾変形のモデルなどに関して不明な点
が多く、今だこの方式を用いた精度のよい板巾制
御装置が提供されていない。 Therefore, a feed-forward method of board width control has been desired. However, it is well known that the width of the strip can be controlled by controlling the tension applied to the rolling mill. There are many unknowns about whether this phenomenon occurs in other places and the model for width deformation, and so far no highly accurate board width control device using this method has been provided.
本発明は上記問題点を考慮してなされたもの
で、巾変形（巾縮み）は材料がスタンド間を走行
する間に徐々に起こるという圧延現象に基いてフ
イードフオワード制御を行い、板巾精度を向上さ
せる合理的な板巾制御装置を提供することを目的
としている。
The present invention has been made in consideration of the above-mentioned problems, and performs feed forward control based on the rolling phenomenon in which width deformation (width shrinkage) occurs gradually while the material is running between stands. The purpose is to provide a rational board width control device that improves accuracy.
上記目的を達成するため、本発明は次に述べる
実験結果に基づいてなされている。すなわち張力
による巾変形（巾縮み）は圧延スタンド間を被圧
延材が走行する間に徐々に起こり、そのモデル
は、例えば下式で表わされる事が実験的に明らか
になつた。
In order to achieve the above object, the present invention has been made based on the experimental results described below. That is, it has been experimentally revealed that width deformation (width shrinkage) due to tension occurs gradually while the rolled material runs between rolling stands, and that the model can be expressed, for example, by the following equation.
WA−WB／WA＝K∫+B +Atn f・ｆ（θ）・dt ……(1)
但し、
WA，WB…隣接２スタンド間のＡ地点とＢ地点
における板巾（mm）（なお圧延材料はＡ地
点からＢ地点へ流れるものとする。）
WA−WB／WA…Ａ地点とＢ地点との間の巾縮み率
（−）
tA，tB…各々、圧延材料がＡ地点、Ｂ地点を通
過する時刻（秒）
tf…圧延材料に加わる張力応力（Kg／mm2）
θ…材料温度（℃）
ｆ（θ）…材料温度θに依存する補正係数
Ｋ，ｎ…定数
〔 〕dt…〔 〕内の時間積分を表わす。 W A −W B /W A =K∫ +B +A t n f・f(θ)・dt...(1) However, W A , W B ...Boards at point A and point B between two adjacent stands Width (mm) (It is assumed that the rolled material flows from point A to point B.) W A - W B / W A ... Width contraction rate between point A and point B (-) t A , t B ...Time (seconds) when the rolled material passes point A and B, respectively t f ...Tension stress applied to the rolled material (Kg/mm 2 ) θ...Material temperature (℃) f(θ)...Depends on material temperature θ Correction coefficients K, n...constants [ ]dt...represents time integral within [ ].
ここで(1)式のモデルでは、被圧延材がある圧延
スタンド間をＡ地点からＢ地点へ流れる際に起こ
る巾縮み量は被圧延材に加わる張力応力tf（Kg／
mm2）のＡ地点〜Ｂ地点間の材料走行時間（張力が
付加される時間）、及び圧延材料温度θ（℃）に関
係することを表わしている。 Here, in the model of equation (1), the amount of width shrinkage that occurs when the material to be rolled flows between rolling stands from point A to point B is the tensile stress t f (Kg/
mm 2 ) between point A and point B (time during which tension is applied) and the rolling material temperature θ (° C.).
したがつて、本発明の特徴は、圧延スタンド間
に張られた板巾計の検出値と次スタンドの板巾目
標値とを比較する事により、被圧延材が板巾計か
ら次スタンドまで走行する間に、変更させるべき
板巾変更量を演算し、その演算結果に基き圧延ス
タンド間に付加すべき張力応力値を、例えば(1)式
より逆算し、張力調整を行う事にある。 Therefore, the feature of the present invention is that by comparing the detection value of the plate width gauge installed between the rolling stands with the target width value of the next stand, the material to be rolled can be moved from the width gauge to the next stand. During this process, the amount of change in the plate width to be changed is calculated, and based on the calculation result, the tension stress value to be applied between the rolling stands is calculated backwards from, for example, equation (1), and the tension is adjusted.
以下、本発明の一実施例を第１図及び第２図を
参照しつつ説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図はタンデム圧延機における板巾制御装置
の概略構成図である。図において、１は板状の金
属材料からなる被圧延材であり、この被圧延材１
は圧延スタンド２から圧延スタンド３に向かつて
流れ、その途中に板巾計４が設けられている。張
力目標値演算装置５では板巾計検出値６、次スタ
ンド板巾目標値７、板巾計４から次スタンド３間
の材料移送時間予測値８、及び材温（圧延材料温
度）予測値９をもとに前記(1)式を用いてスタンド
２，３間に付加すべき張力応力目標値１０を演算
する。張力制御装置１１は張力応力目標値１０を
もとに、ルーパ制御装置１２に対してルーバトル
ク目標修正量１３を出力するか、或は、圧延スタ
ンド２を駆動する駆動電動機１４の速度制御装置
１５に対して駆動電動機１４の速度目標修正量１
６を出力する。ルーパ制御装置１２はルーパトル
ク目標値修正量１３に基いてルーパ駆動部１７、
ルーパアーム１８、及びルーパロール１９を介し
て被圧延材１を上下動させて張力調整を行う。一
方、速度制御装置１５は速度目標値修正量１６に
基づいて駆動電動機１４の回転速度を変化させて
張力調整を行う。そしてこのような張力調整によ
り、被圧延材１が圧延スタンド３に到達した時の
板巾が目標値に制御される。 FIG. 1 is a schematic diagram of a strip width control device in a tandem rolling mill. In the figure, 1 is a rolled material made of a plate-shaped metal material, and this rolled material 1
flows from the rolling stand 2 to the rolling stand 3, and a plate width gauge 4 is provided along the way. The tension target value calculation device 5 calculates a board width meter detection value 6, a next stand board width target value 7, a predicted material transfer time value 8 between the plate width meter 4 and the next stand 3, and a predicted material temperature (rolled material temperature) value 9. Based on the equation (1) above, the target value 10 of the tension stress to be applied between the stands 2 and 3 is calculated. Based on the tension stress target value 10, the tension control device 11 outputs a louver torque target correction amount 13 to the looper control device 12, or outputs a louver torque target correction amount 13 to the speed control device 15 of the drive motor 14 that drives the rolling stand 2. On the other hand, the speed target correction amount 1 of the drive motor 14
Outputs 6. The looper control device 12 controls the looper drive unit 17 based on the looper torque target value correction amount 13.
The tension is adjusted by vertically moving the rolled material 1 via the looper arm 18 and looper roll 19. On the other hand, the speed control device 15 adjusts the tension by changing the rotational speed of the drive motor 14 based on the speed target value modification amount 16. By such tension adjustment, the width of the plate when the material to be rolled 1 reaches the rolling stand 3 is controlled to a target value.
次に、本実施例の動作について説明する。被圧
延材１が圧延スタンド２を出た後に、板巾計４に
到達すると、この板巾計４から、板巾計検出値６
が張力目標値演算装置５に送られる。張力目標値
演算装置５ではまず板巾計検出値６と次スタンド
板巾目標値７とを比較することにより、板巾計〜
次スタンド３間を被圧延材が走行する間に変更さ
せるべき板巾変更量を次の(2)式に従つて演算す
る。 Next, the operation of this embodiment will be explained. After the material to be rolled 1 leaves the rolling stand 2 and reaches the plate width meter 4, from this plate width meter 4, the detected value 6 of the plate width meter is obtained.
is sent to the tension target value calculation device 5. The tension target value calculating device 5 first compares the board width meter detected value 6 and the next stand board width target value 7, and calculates the board width meter ~
The amount of change in the plate width to be changed while the material to be rolled runs between the next stands 3 is calculated according to the following equation (2).
Ｅ＝WB−WB／WA ……(2)
但し、
Ｅ……圧延材料が板巾計〜次スタンド間を走行
する間に変更すべき板巾変更率（−）
WA……板巾検出値（mm）
WB……次スタンド板巾目標値（mm）
次に前記演算装置５は板巾計４〜次スタンド３
間の材料移送時間予測値８及び材温予測値９を考
慮してスタンド２，３間に付加すべき張力応力目
標値１０を次の(3)式に従つて演算し、その演算結
果を張力制御装置１１に送る。 E=W B −W B /W A ...(2) However, E...The plate width change rate (-) that should be changed while the rolled material travels between the plate width gauge and the next stand W A ...Plate Width detection value (mm) W B ...Next stand board width target value (mm) Next, the arithmetic unit 5 calculates the board width meter 4 to next stand 3.
The target tension stress value 10 to be applied between stands 2 and 3 is calculated according to the following equation (3), taking into consideration the material transfer time prediction value 8 and material temperature prediction value 9 between the stands, and the calculation result is used as the tension It is sent to the control device 11.
tf＝［Ｅ・１／TAB・Ｋ・ｆ（θ）］1/n ……(3)
但し、
tf……スタンド間に付加すべき張力応力目標値
（Kg／mm2）
Ｅ……(2)式による演算結果（−）
TAB……板巾計４〜次スタンド間の材料移送時
間予測値（秒）
θ……材温予測値（℃）
ｆ（θ）……材料温度θに依存する補正係数
Ｋ，ｎ……定数
なお、(3)式は前記(1)式で示される巾縮みモデル
を張力に関して解いた式となつている。 t f = [E・1/T AB・K・f(θ)] 1/n ...(3) However, t f ...Tension stress target value to be applied between stands (Kg/mm 2 ) E... …Result of calculation using equation (2) (−) T AB …Predicted material transfer time between board width gauge 4 and the next stand (seconds) θ…Predicted material temperature (℃) f(θ)…Material temperature Correction coefficients dependent on θ K, n...constants Note that equation (3) is an equation obtained by solving the width contraction model shown in equation (1) above with respect to tension.
張力制御装置１１では張力応力目標値１０をも
とに、実際の張力付加手段であるルーパ制御装置
１２或は速度制御装置１５に対し、それぞれルー
パトルク目標値修正量１３、速度目標値修正量１
６を送る事により張力調整を行う。この様にして
調整された張力がスタンド２，３間に付加される
事により、圧延材料１は板巾計４〜次スタンド３
間で目標とする巾縮みを起こし、次スタンド３の
到達時には目標とする板巾に制御されることにな
る。 In the tension control device 11, based on the tension stress target value 10, a looper torque target value correction amount 13 and a speed target value correction amount 1 are respectively applied to the looper control device 12 or the speed control device 15, which are actual tension applying means.
Adjust the tension by sending 6. By applying the tension adjusted in this way between the stands 2 and 3, the rolled material 1 is
The target width will be reduced between the two, and when the next stand 3 is reached, the target width will be achieved.
第２図ａ，ｂ，ｃは上記実施例の制御結果を記
すチヤートである。なお、実線は従来のフイード
バツク制御を実施した場合であり、本実施例のフ
イードフオワード制御を実施した場合を示してい
る。またチヤートは上から順に第２図ａが板巾計
４の出力、第２図ｂが次圧延スタンドの板巾、及
び第２図ｃがスタンド間２，３の張力をそれぞれ
示している。そして第２図から明らかなように、
従来のフイードバツク制御では困難であるような
スキツドマーク等に起因する板巾変動に対して
も、本実施例によるフイードフオワード制御を実
施する事により、応答の速い張力修正がなされ、
良好な板巾制御結果の得られる事がわかる。 Figures 2a, b, and c are charts showing the control results of the above embodiment. Note that the solid line shows the case where conventional feedback control is implemented, and the solid line shows the case where the feedback control of this embodiment is implemented. Further, from the top of the chart, Fig. 2a shows the output of the plate width meter 4, Fig. 2b shows the plate width of the next rolling stand, and Fig. 2c shows the tension between the stands 2 and 3. And as is clear from Figure 2,
By implementing the feedback control according to this embodiment, the tension can be corrected with a quick response, even in the case of width fluctuations caused by skid marks, etc., which would be difficult with conventional feedback control.
It can be seen that good board width control results can be obtained.
なお、上記実施例では、張力制御装置１１の出
力信号をルーパ制御装置１２または駆動電動機１
４の速度制御装置１５に送る事によりスタンド
２，３間の張力調整を行つているが、張力調整の
手段は特にここに示したものに限定されるもので
はない。 In the above embodiment, the output signal of the tension control device 11 is transmitted to the looper control device 12 or the drive motor 1.
Although the tension between the stands 2 and 3 is adjusted by sending the tension to the speed control device 15 of No. 4, the means for adjusting the tension is not particularly limited to what is shown here.
以上述べた様に、本発明ではスタンド間に設け
られた板巾計の検出値をもとに板巾計からスタン
ド間を材料が走行する間に変更すべき板巾変更量
を演算し、その演算結果に基き圧延スタンド間を
被圧延材が走行する間に生ずる巾縮みを考慮して
スタンド間張力の調整を行う事により、次スタン
ド到達時の板巾が目標値に制御されるよう構成し
たので、スキツドマーク等に起因する板巾変動に
対しても対処出来る応答性に優れた板巾制御を実
現出来る。
As described above, in the present invention, the amount of change in the board width to be changed while the material travels between the stands is calculated from the board width meter based on the detected value of the board width meter installed between the stands. Based on the calculation results, the tension between the stands is adjusted in consideration of the width shrinkage that occurs while the rolled material travels between the rolling stands, so that the width of the strip when it reaches the next stand is controlled to the target value. Therefore, board width control with excellent responsiveness that can cope with board width fluctuations caused by skid marks and the like can be realized.
第１図は本発明ま一実施例を示す構成図、第２
図ａ，ｂ，ｃは第１図の制御効果を示す図であ
る。
１……圧延材料、２，３……圧延スタンド、４
……板巾計、５……張力目標演算装置、６……板
巾計検出値、７……次スタンド板巾目標値、８…
…板巾計から次スタンド間の材料移送時間予測
値、９……材温予測値、１２……ルーパ制御装
置、１３……張力応力目標値修正量、１４……駆
動電動機、１５……速度制御装置、１６……速度
目標値修正量、１７……ルーパ駆動部、１８……
ルーパアーム、１９……ルーパロール。
FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
Figures a, b, and c are diagrams showing the control effects of Figure 1. 1... Rolling material, 2, 3... Rolling stand, 4
... Board width meter, 5... Tension target calculation device, 6... Board width meter detection value, 7... Next stand board width target value, 8...
...Predicted material transfer time from the board width meter to the next stand, 9...Predicted material temperature, 12...Looper control device, 13...Tension stress target value correction amount, 14...Drive motor, 15...Speed Control device, 16... Speed target value correction amount, 17... Looper drive unit, 18...
Loopa arm, 19... Loopa roll.
Claims (1)
をかけながら連続圧延するタンデム圧延機におい
て、 隣接する二つの圧延スタンド間に設けられ被圧
延材の板巾を検出する板巾計と、 この板巾計の検出値と前記二つの圧延スタンド
における下流側圧延スタンドの板巾目標値とを比
較して前記板巾計から前記下流側圧延スタンド間
を被圧延材が走行する間に変更させるべき板巾変
更量を演算する第１の演算装置と、 前記板巾変更量、前記板巾計から前記下流側圧
延スタンド間における被圧延材の移送時間予測
値、及び被圧延材の温度予測値に基いて前記二つ
の圧延スタンド間の被圧延材に付加すべき張力応
力目標値を圧延スタンドを被圧延材が走行する間
に生ずる巾縮みを考慮して演算する第２の演算装
置と、 前記張力応力目標値をもとに前記二つの圧延ス
タンド間の被圧延材の張力調整を行う張力制御装
置と を備えたことを特徴とするタンデム圧延機の板巾
制御装置。[Scope of Claims] 1. In a tandem rolling mill that continuously rolls a material to be rolled while applying tension using a plurality of rolling stands, a plate width provided between two adjacent rolling stands to detect the width of the material to be rolled. The detection value of this plate width meter is compared with the target value of the plate width of the downstream rolling stand in the two rolling stands, and the rolling material is moved between the downstream rolling stands from the plate width meter. a first calculation device that calculates the amount of change in the width of the sheet to be changed; the amount of change in the sheet width, a predicted value of the transfer time of the rolled material from the sheet width meter to the downstream rolling stand; a second calculation device that calculates a target value of tensile stress to be applied to the material to be rolled between the two rolling stands based on the predicted temperature value, taking into consideration the width shrinkage that occurs while the material to be rolled runs through the rolling stands; A strip width control device for a tandem rolling mill, comprising: and a tension control device that adjusts the tension of the material to be rolled between the two rolling stands based on the tension stress target value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175744A JPS6152917A (en) | 1984-08-23 | 1984-08-23 | Plate width controlling device of tandem rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59175744A JPS6152917A (en) | 1984-08-23 | 1984-08-23 | Plate width controlling device of tandem rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6152917A JPS6152917A (en) | 1986-03-15 |
| JPH0324283B2 true JPH0324283B2 (en) | 1991-04-02 |
Family
ID=16001486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59175744A Granted JPS6152917A (en) | 1984-08-23 | 1984-08-23 | Plate width controlling device of tandem rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6152917A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4671544B2 (en) * | 2001-06-21 | 2011-04-20 | 日新製鋼株式会社 | Sheet width control method in cold tandem rolling |
| KR100543300B1 (en) * | 2001-11-09 | 2006-01-20 | 주식회사 포스코 | Method and apparatus for controlling the width of the rolled product |
| EP2998040A1 (en) * | 2014-09-17 | 2016-03-23 | Primetals Technologies Germany GmbH | Width adjustment in a finishing train |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668519A (en) * | 1979-11-07 | 1981-06-09 | Toshiba Corp | Width control device of rolling mill |
| JPS5758910A (en) * | 1980-09-26 | 1982-04-09 | Sumitomo Metal Ind Ltd | Controlling method for sheet breadth in continuous hot rolling mill |
-
1984
- 1984-08-23 JP JP59175744A patent/JPS6152917A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668519A (en) * | 1979-11-07 | 1981-06-09 | Toshiba Corp | Width control device of rolling mill |
| JPS5758910A (en) * | 1980-09-26 | 1982-04-09 | Sumitomo Metal Ind Ltd | Controlling method for sheet breadth in continuous hot rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6152917A (en) | 1986-03-15 |
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