JPH0234243B2 - - Google Patents
Info
- Publication number
- JPH0234243B2 JPH0234243B2 JP59167577A JP16757784A JPH0234243B2 JP H0234243 B2 JPH0234243 B2 JP H0234243B2 JP 59167577 A JP59167577 A JP 59167577A JP 16757784 A JP16757784 A JP 16757784A JP H0234243 B2 JPH0234243 B2 JP H0234243B2
- Authority
- JP
- Japan
- Prior art keywords
- target value
- correction amount
- tension
- side tension
- plate thickness
- 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
- 238000005096 rolling process Methods 0.000 claims description 34
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004804 winding 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
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
- B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/222—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a rolling-drawing process; in a multi-pass mill
Description
【発明の詳細な説明】
（発明の技術分野）
この発明は１スタンド多パス圧延機の板厚制御
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a plate thickness control device for a one-stand multi-pass rolling mill.
一般に圧延機と称されているものは１つのスタ
ンドに１つの圧延パスを有する１スタンド１パス
圧延機がほとんどである。
Most of what is generally called a rolling mill is a one-stand, one-pass rolling mill in which one stand has one rolling pass.
この種の圧延機では１スタンド当りの圧下率は
大きい場合でも40％程度であり、高圧下圧延をお
こなう場合には多数のスタンドを並設したタンデ
ム圧延機が用いられる。 In this type of rolling mill, the reduction rate per stand is about 40% at most, and when performing high reduction rolling, a tandem rolling mill with a large number of stands arranged side by side is used.
このタンデム圧延機はスタンド数が多いことか
ら広い設置面積を必要とし、価格的にも高価なも
のであつた。 Since this tandem rolling mill has a large number of stands, it requires a large installation area and is expensive.
近年この設置面積および価格を低く抑えること
を目的として、上下の控ロール間に３個以上の作
業ロールを積み重ねて複数の圧延パスを形成し、
これらの圧延パスに被圧延材を連続的に通して圧
延をおこなう１スタンド多パス圧延機が注目され
ている。この１スタンド多パス圧延機によれば１
スタンド当りの圧下率を70％にも高める高圧下圧
延が可能となる。しかしながら従来の１スタンド
多パス圧延機においては、最終パス出側の板厚制
御を目的として最終パス上下作業ロールの異速比
目標値の修正をおこなつた場合には最終パス出側
板厚のみならず第１パス、第２パス、…の出側板
厚も変化してしまうという欠点を有している。す
なわち１スタンド多パス圧延機においては、各パ
ス間の相互干渉が存在し、これが板厚制御精度の
低下につながつている。現在のところこの各パス
間の相互干渉を考慮した板厚制御装置に関しては
まだ有効なものが存在しないのが現状である。 In recent years, with the aim of keeping the installation area and price low, three or more work rolls are stacked between the upper and lower backing rolls to form multiple rolling passes.
A one-stand multi-pass rolling mill that rolls a material to be rolled by continuously passing it through these rolling passes is attracting attention. According to this one-stand multi-pass rolling mill, 1
High reduction rolling with a reduction rate of 70% per stand is now possible. However, in a conventional one-stand multi-pass rolling mill, when the target value of the different speed ratio of the upper and lower work rolls in the final pass is corrected for the purpose of controlling the plate thickness at the outlet side of the final pass, the thickness of the plate only on the outlet side of the final pass is The disadvantage is that the thickness of the outlet side of the first pass, second pass, etc. also changes. In other words, in a one-stand multi-pass rolling mill, there is mutual interference between passes, which leads to a decrease in plate thickness control accuracy. At present, there is no effective plate thickness control device that takes this mutual interference between paths into account.
この発明は上述した事情を解決するためになさ
れたもので、その目的は最終圧延パス出側の板厚
精度を良好に制御することのできる１スタンド多
パス圧延機の板厚制御装置を提供するにある。
This invention was made to solve the above-mentioned circumstances, and its purpose is to provide a plate thickness control device for a one-stand multi-pass rolling mill that can satisfactorily control the plate thickness accuracy at the exit side of the final rolling pass. It is in.
上記目的を達成するためにこの発明では、入側
張力目標値に基づいて被圧延材の入側張力を制御
する入側張力制御系と、出側張力目標値に基づい
て前記被圧延材の出側張力を制御する出側張力制
御系と、複数の作業ロール間の異速比目標値に基
づいて前記複数の作業ロール間の回転速度比を制
御する板厚制御系とを具備してなる１スタンド多
パス圧延機の板厚制御装置において、前記板厚制
御系から出力される最終パス作業ロールの異速比
目標値修正量ΔX3を入力し、入側張力目標値修正
量及び出側張力目標値修正量をそれぞれ演算し、
前記入側張力目標値修正量を前記入側張力目標値
に加算して前記入側張力制御系に出力し、前記出
側張力目標値修正量を前記出側張力目標値に加算
して前記出側張力制御系に出力する入出側張力目
標値修正量演算装置を設けたことを特徴としてい
る。
In order to achieve the above object, the present invention includes an entry tension control system that controls the entry tension of the rolled material based on an entry tension target value, and an exit tension control system of the rolled material based on the exit tension target value. 1 comprising: an exit side tension control system that controls side tension; and a plate thickness control system that controls the rotational speed ratio between the plurality of work rolls based on a different speed ratio target value between the plurality of work rolls. In the plate thickness control device of the stand multi-pass rolling mill, the different speed ratio target value correction amount ΔX 3 of the final pass work roll output from the plate thickness control system is input, and the input side tension target value correction amount and the output side tension are Calculate each target value correction amount,
Adding the input side tension target value modification amount to the input side tension target value and outputting it to the input side tension control system, adding the output side tension target value modification amount to the output side tension target value and outputting the result to the output side tension target value. It is characterized by being provided with an input/output side tension target value correction amount calculation device that outputs to the side tension control system.
以下この発明を実施例に基づいて詳細に説明す
る。図はこの発明が適用される１スタンド多パス
圧延機とこの発明の一実施例にかかる板厚制御装
置の構成とを示したブロツク図である。
The present invention will be described in detail below based on examples. The figure is a block diagram showing the configuration of a one-stand multi-pass rolling mill to which the present invention is applied and a plate thickness control device according to an embodiment of the present invention.
なお、以下の説明においては、１スタンド多パ
ス圧延機の一例として、４本の作業ロール、２本
の控えロール、２本の引出しロールを有して１ス
タンド当り３回の圧延が行われる１スタンド３パ
ス圧延機を取上げるが、本発明はこれに限定され
るものではなく、これ以外の多パス圧延機、例え
ば１スタンド４パス圧延機にも適用できる。 In the following explanation, as an example of a one-stand multi-pass rolling mill, a one-stand rolling mill that has four work rolls, two backing rolls, and two pull-out rolls and performs rolling three times per stand will be used. Although a three-stand rolling mill will be described, the present invention is not limited thereto, and can also be applied to other multi-pass rolling mills, for example, one-stand four-pass rolling mills.
図中１〜４はそれぞれ作業ロールを示し、これ
ら第１〜第４作業ロール１〜４は下側控ロール５
と上側控ロール６との間に挟まれる形で積み重ね
られて配設されている。そして主機速度制御装置
２２によつて作業ロール２〜４の回転速度が制御
される。 In the figure, 1 to 4 indicate work rolls, and these first to fourth work rolls 1 to 4 are the lower backing rolls 5.
and the upper backing roll 6 in a stacked manner. The rotational speeds of the work rolls 2 to 4 are controlled by the main machine speed control device 22.
被圧延材料１１は各作業ロールの間を蛇行状に
矢印で示した向きに通過し圧延がおこなわれる。
このようにして１スタンド当り３回の圧延がおこ
なわれることになるが、圧延の順序に従つて順次
第１パス、第２パス、第３パスと称する。第１パ
スと第２パスとの間には引出しロール７が、第２
パスと第３パスとの間には引出しロール８がそれ
ぞれ設置され、各パス間で被圧延材料１１を引出
す役割を果している。 The material to be rolled 11 passes between the work rolls in a meandering manner in the direction indicated by the arrow, and is rolled.
In this way, rolling is performed three times per stand, and the rolling is called a first pass, a second pass, and a third pass according to the order of rolling. A drawer roll 7 is provided between the first pass and the second pass.
A pull-out roll 8 is installed between each pass and the third pass, and serves to pull out the rolled material 11 between each pass.
なお各パス間で被圧延材料１１を引出す必要の
ない時は、破線で示すような状態で圧延するよう
な構成となつている。また第１パス入側には被圧
延材料１１を巻戻すための巻戻しリール１２と張
力検出用のテンシヨンロールメータ９とが、第３
パス出側には同様に張力検出用のテンシヨンメー
タロール１０と被圧延材料１１を巻取るための巻
取りリール１３とが設置されている。 Note that when there is no need to pull out the material 11 to be rolled between each pass, the rolling material 11 is configured to be rolled in the state shown by the broken line. Further, on the first pass entry side, there are a rewind reel 12 for unwinding the material to be rolled 11 and a tension roll meter 9 for tension detection.
Similarly, a tension meter roll 10 for tension detection and a take-up reel 13 for winding up the material 11 to be rolled are installed on the exit side of the pass.
さらに巻戻しリール１２には電動機１４を介し
て入側張力制御装置２０が、一方、巻取りリール
１３には電動機１５を介して出側張力制御装置２
１が接続され、入側張力と出側張力とをそれぞれ
制御するようになつている。各作業ロール４，
３，２はそれぞれ電動機２５，２６，２７を介し
て主機速度制御２２に接続され、各作業ロール間
の異速比が制御されるよう構成されている。 Further, an inlet tension control device 20 is connected to the unwinding reel 12 via an electric motor 14, and an outlet tension control device 2 is connected to the take-up reel 13 via an electric motor 15.
1 is connected to control the inlet tension and the outlet tension, respectively. Each work roll 4,
3 and 2 are connected to the main machine speed control 22 via electric motors 25, 26, and 27, respectively, and are configured to control different speed ratios between the respective work rolls.
板厚目標値に対応して各作業ロール間の異速比
目標値はあらかじめ定められ、この目標値と実際
の異速比との偏差に対応する異速比目標値修正量
ΔX3が自動板厚制御装置２３から出力され主機速
度制御装置２２を介して各作業ロール間の異速比
目標値が修正され所定の板厚目標値が得られるよ
うな制御がおこなわれている。 The different speed ratio target value between each work roll is determined in advance in accordance with the plate thickness target value, and the different speed ratio target value correction amount ΔX 3 corresponding to the deviation between this target value and the actual different speed ratio is automatically Control is performed such that the different speed ratio target value between each work roll is corrected by output from the thickness control device 23 via the main machine speed control device 22 to obtain a predetermined plate thickness target value.
なお異速比目標値修正量ΔX3を算出するための
自動板厚制御装置２３の構成自体は、この発明と
は直接関係がないためその詳細は省略する。自動
板厚制御装置２３からの異速比目標値修正量ΔX3
は入出側張力目標値修正量演算装置２４に入力さ
れ、その出力はそれぞれ入側張力設定値Tb1 *、
出側張力設定値Tf *と加算されて入側張力製装置
２０および出側張力制御装置２１に入力されるよ
うに構成されている。 Note that the configuration of the automatic plate thickness control device 23 for calculating the different speed ratio target value correction amount ΔX 3 is not directly related to the present invention, so the details thereof will be omitted. Different speed ratio target value correction amount ΔX 3 from automatic plate thickness control device 23
are input to the input/output side tension target value correction amount calculation device 24, and the output thereof is the input side tension set value T b1 * , respectively.
It is configured to be added to the output side tension set value T f * and input to the input side tension making device 20 and the output side tension control device 21 .
ここで入側張力制御装置２０および出側張力制
御装置２１は、それぞれ電流制御装置１６，１７
と電流目標値演算装置１８，１９とから構成され
ている。なお以下の説明で使用する第３作業ロー
ル３と第４作業ロール４との間の異速比X3は次
式のように定義される。 Here, the inlet tension control device 20 and the outlet tension control device 21 are current control devices 16 and 17, respectively.
and current target value calculation devices 18 and 19. Note that the different speed ratio X 3 between the third work roll 3 and the fourth work roll 4 used in the following explanation is defined as the following equation.
X3＝V4／V3−１ ………(1)
X3：第３作業ロール３と第４作業ロールとの異
速比（−）
V3：第３作業ロール周速度（mpm）
V4：第４作業ロール（mpm）
したがつて異速比目標値修正量ΔX3は(1)式で表
わされる異速比目標値X3の変化量を意味する。 X 3 = V 4 /V 3 -1 ......(1) X 3 : Different speed ratio between the third work roll 3 and the fourth work roll (-) V 3 : Third work roll circumferential speed (mpm) V 4 : Fourth work roll (mpm) Therefore, the different speed ratio target value correction amount ΔX 3 means the amount of change in the different speed ratio target value X 3 expressed by equation (1).
次にこの実施例の動作について説明する。まず
最終パス（第３パス）出側板厚を所望の目標値に
制御するために、自動板厚制御装置２３から出力
される異速比目標値修正量ΔX3が入出側張力目標
値修正量演算装置２４に入力される。演算装置２
４は前述した異速比目標値修正量ΔX3が第１パス
および第２パスの出側板厚に及ぼす影響を相殺す
るように入側張力目標値修正量ΔTb1と、出側張
力目標値修正量ΔTf3とを次式により計算する。 Next, the operation of this embodiment will be explained. First, in the final pass (third pass), in order to control the exit side plate thickness to the desired target value, the different speed ratio target value correction amount ΔX 3 output from the automatic plate thickness control device 23 is used to calculate the input/output side tension target value correction amount. input to device 24; Arithmetic device 2
4 is the entrance tension target value modification amount ΔT b1 and the exit tension target value modification amount to offset the influence of the aforementioned different speed ratio target value modification amount ΔX 3 on the exit side plate thickness in the first pass and the second pass. The amount ΔT f3 is calculated using the following formula.
ΔTb1＝α・ΔX3 ………(2)
ΔTf3＝β・ΔX3 ………(3)
α：入側張力目標値修正量演算係数
β：出側張力目標値修正量演算係数
なお演算装置２４はミニコンピユータやプログ
ラマブルコントローラ等を用いることにより容易
に実現することが可能である。演算装置２４によ
り計算されて出力される入側張力目標値修正量
ΔTb1は入側張力設定値Tb1 *と加算され、入側張
力目標値Tb1refとなり入側張力制御装置２０に送
られる。この入側張力制御装置２０では、入力さ
れた入側張力目標値Tb1refを電流目標値演算装置
１８によつて電流目標値IPRREFに変換し、この電
流目標値IPRREFは電流制御装置１６を介して巻戻
しリール駆動電動機１４の回転トルクを制御し入
側張力を変化させる。 ΔT b1 = α・ΔX 3 ………(2) ΔT f3 = β・ΔX 3 ………(3) α: Input side tension target value correction amount calculation coefficient β: Output side tension target value correction amount calculation coefficient Calculation The device 24 can be easily realized by using a minicomputer, a programmable controller, or the like. The input side tension target value correction amount ΔT b1 calculated and outputted by the arithmetic unit 24 is added to the input side tension set value T b1 * to become the input side tension target value T b1ref and sent to the input side tension control device 20. In this input side tension control device 20, the inputted input side tension target value T b1ref is converted into a current target value I PRREF by the current target value calculation device 18, and this current target value I PRREF is converted into a current target value I PRREF . The rotational torque of the rewind reel drive motor 14 is controlled through the rewind reel drive motor 14 to change the entry tension.
同様に出側張力目標値修正量ΔTf3は出側張力
設定値Tf3 *と加算され、出側張力目標値Tf3refと
なり、出側張力制御装置２１に送られる。そして
入側と同様に出側張力制御装置２１は巻取りリー
ル駆動電動機１５の回転トルクを制御して出側張
力を変化させる。 Similarly, the output tension target value correction amount ΔT f3 is added to the output tension set value T f3 * to become the output tension target value T f3ref , which is sent to the output tension control device 21. Similarly to the input side, the output tension control device 21 controls the rotational torque of the take-up reel drive motor 15 to change the output tension.
また主機速度制御装置２２の交差角周波数は20
（rad／sec）程度であり、入側張力制御装置２０
と出側張力制御装置２１の交差角周波数は100
（rad／sec）程度であるため、前述した第１パス
および第２パスの干渉を相殺するためには主機速
度制御装置２２と入側および出側の張力制御装置
２０，２１との応答速度をマツチングさせる必要
がある。主機速度制御装置２２に比べ入側張力制
御装置２０と出側張力制御装置２１の応答速度は
速いのであるから、入側張力制御装置２０と出側
張力制御装置２１の応答速度を主機速度制御装置
２２の応答速度に合うように遅らせてやればマツ
チングの問題は解消できる。たとえば入側張力制
御装置２０と出側張力制御装置２１とに１次遅れ
要素を追加したり、入出側張力目標値修正量演算
装置２４に１次遅れ要素の機能を持たせて出側張
力目標値修正量ΔTf3の出力を遅らせる等の方法
が考えられる。 Also, the cross angular frequency of the main engine speed control device 22 is 20
(rad/sec), and the entry tension control device 20
The intersection angular frequency of the output side tension control device 21 is 100
(rad/sec), so in order to cancel out the interference between the first and second paths mentioned above, the response speed of the main engine speed control device 22 and the tension control devices 20 and 21 on the entry and exit sides should be adjusted. It is necessary to match. Since the response speeds of the inlet tension control device 20 and the outlet tension control device 21 are faster than the main engine speed control device 22, the response speeds of the inlet tension control device 20 and the outlet tension control device 21 are controlled by the main engine speed control device. The matching problem can be solved by delaying the response speed to match the response speed of 22. For example, by adding a first-order lag element to the inlet-side tension control device 20 and the outlet-side tension control device 21, or by giving the function of the first-order lag element to the input-output side tension target value correction amount calculation device 24, the output tension can be set. Possible methods include delaying the output of the value correction amount ΔT f3 .
次に前述した入側張力目標値修正量演算係数α
と出側張力目標値修正量演算係数βとの算出方法
の一例を説明する。 Next, the input side tension target value correction amount calculation coefficient α mentioned above
An example of a method of calculating the output side tension target value correction amount calculation coefficient β will be explained.
まず各パス出側板厚変動量Δhj（ｊ＝＝１〜３）
を、異速比目標値修正量ΔX3と入側張力目標値修
正量ΔTb1と出側張力目標値修正量ΔTf3との１次
多項式として次式(4)、(5)、(6)のように定式化す
る。 First, the amount of variation in plate thickness on the exit side of each pass Δh j (j==1 to 3)
is expressed as the following equations (4), (5), and (6) as a first-order polynomial of the different speed ratio target value correction amount ΔX 3 , the input side tension target value correction amount ΔT b1 , and the output side tension target value correction amount ΔT f3 . Formulate as:
Δh3＝A11・ΔX3＋A12・ΔTb1＋A13・ΔTf3
………(4)
Δh2＝A21・ΔX3＋A22・ΔTb1＋A23・ΔTf3
………(5)
Δh1＝A31・ΔX3＋A32・ΔTb1＋A33・ΔTf3
………(6)
ここで、Aij、（ｉ＝１〜３、Ｊ＝１〜３）：定
数（影響係数）
今、異速比目標値修正量ΔX3が与えられたとす
ると、ΔTb1＝ΔTf3＝０のままであれば、この
ΔX3の修正によつてΔh1とΔh2とがそれぞれA31・
ΔX3とA21・ΔX3だけ変動してしまう。図に示す
ような１スタンド３パス圧延機では相互干渉のた
め第１パスと第２パスの出側板厚変動が最終パス
である第３パスの出側板厚にも同時に板厚変動と
して悪影響を与える。Δh 3 =A 11・ΔX 3 +A 12・ΔT b1 +A 13・ΔT f3
………(4) Δh 2 =A 21・ΔX 3 +A 22・ΔT b1 +A 23・ΔT f3
………(5) Δh 1 =A 31・ΔX 3 +A 32・ΔT b1 +A 33・ΔT f3
………(6) Here, A ij , (i = 1 to 3, J = 1 to 3): Constant (influence coefficient) Now, assuming that the different speed ratio target value correction amount ΔX 3 is given, ΔT b1 If =ΔT f3 = 0, this correction of ΔX 3 will cause Δh 1 and Δh 2 to become A 31・
Only ΔX 3 and A 21・ΔX 3 will fluctuate. In a 1-stand 3-pass rolling mill as shown in the figure, due to mutual interference, variations in the exit plate thickness in the 1st and 2nd passes simultaneously have an adverse effect on the exit plate thickness in the 3rd pass, which is the final pass. .
したがつて第１パスの出側板厚変動量Δh1と第
２パスの出側板厚変動量Δh2とはできるだけ零に
近い方が望ましい。そこで、ここでは(5)、(6)式の
Δh1とΔh2とを零として、
A21・ΔX3＋A22・ΔTb1＋A23・ΔTf3＝０
………(5)′
A31・ΔX3＋A32・ΔTb1＋A33・ΔTf3＝０
………(6)′
のように変形し、この(5)′、(6)′式を連立させて
ΔTb1とΔTf3とを求めると、
ΔTb1＝A23・A31−A21・A33／A22・A33−A23・A32・ΔX
3………(7)
となる。このため前述した係数αは
α＝A23・A31−A21・A33／A22・A33−A23・A32………(8
)
と表わすことができる。またΔTf3は(8)式の係数
αを利用して
Tf3＝−１／A23（A21＋A22・α）・ΔX3 ………(9)
と表わすことができる。このため前述した係数β
は
β＝−１／A23（A21＋A22・α） ………(10)
となる。以上により図に示す演算装置２４で使用
する係数α、βを算出することができる。 Therefore, it is desirable that the outgoing plate thickness variation Δh 1 of the first pass and the outgoing plate thickness variation Δh 2 of the second pass be as close to zero as possible. Therefore, here, assuming that Δh 1 and Δh 2 in equations (5) and (6) are zero, A 21・ΔX 3 +A 22・ΔT b1 +A 23・ΔT f3 =0
………(5)′ A 31・ΔX 3 +A 32・ΔT b1 +A 33・ΔT f3 =0
...... Transform as shown in (6)' and combine equations (5)' and (6)' to find ΔT b1 and ΔT f3 . ΔT b1 = A 23・A 31 −A 21・A 33 /A 22・A 33 −A 23・A 32・ΔX
3 ......(7). Therefore, the coefficient α mentioned above is α=A 23・A 31 −A 21・A 33 /A 22・A 33 −A 23・A 32 ………(8
) can be expressed as Further, ΔT f3 can be expressed as T f3 =−1/A 23 (A 21 +A 22 ·α)·ΔX 3 (9) using the coefficient α in equation (8). Therefore, the coefficient β
is β=−1/A 23 (A 21 +A 22・α) (10). As described above, the coefficients α and β used in the arithmetic unit 24 shown in the figure can be calculated.
次に実験圧延機により得られた測定データを用
いた計算例を示す。ここで第３作業ロールと第４
作業ロールとの異速比を0.01だけ増加させたい場
合、すなわち異速比目標値修正量ΔX3＝0.01を仮
定する。測定データより前記(4)、(5)、(6)式に相当
する具体的な数値例として(11)、(12)、（13）式の関
係が得られた。 Next, an example of calculation using measurement data obtained from an experimental rolling mill will be shown. Here, the third work role and the fourth
Assume that the different speed ratio with the work roll is to be increased by 0.01, that is, the different speed ratio target value correction amount ΔX 3 =0.01. From the measured data, the relationships expressed by Equations (11), (12), and (13) were obtained as specific numerical examples corresponding to Equations (4), (5), and (6) above.
Δh3＝−0.500・ΔX3＋2.93×10-5・ΔTb1−
5.25×10-5・ΔTf3………(11)
Δh2＝−0.129・ΔX3＋2.93×10-5・ΔTb1＋
1.90×10-5・ΔTf3………(12)
Δh1＝−0.229・ΔX3−4.28×10-5・ΔTb1＋
2.17×10-5・ΔTf3………（13）
この(11)、(12)、（13）式にΔX3＝0.01、Δh2＝△h1
＝０をそれぞれ代入してΔh3、ΔTb1、ΔTf3をそ
れぞれ求めると、
Δh3−0.00595（mm） ………（14）
ΔTb1＋87.474（Kgｆ） ………（15）
ΔTf3＋66.999（Kgｆ） ………（16）
となる。つまり第３パス出側板厚を減少させる目
的で第３作業ロールと第４作業ロール４との異速
比を0.01だけ増加させた場合には、入側張力目標
値は87.474（Kgｆ）だけ増加させ、出側張力目標
値は66.999（Kgｆ）だけ増加させれば、第１パス
および第２パスの出側板厚変動はほとんど零に抑
えられ、第３パス出側板厚のみ0.00595mmだけ薄
くなることになる。 Δh 3 = −0.500・ΔX 3 +2.93×10 -5・ΔT b1 −
5.25×10 -5・ΔT f3 ………(11) Δh 2 =−0.129・ΔX 3 +2.93×10 -5・ΔT b1 +
1.90×10 -5・ΔT f3 ………(12) Δh 1 =−0.229・ΔX 3 −4.28×10 −5・ΔT b1 +
2.17×10 -5・ΔT f3 ………(13) In equations (11), (12), and (13), ΔX 3 = 0.01, Δh 2 = △h 1
= 0 and find Δh 3 , ΔT b1 , and ΔT f3 respectively, Δh 3 −0.00595 (mm) ………(14) ΔT b1 +87.474 (Kgf) ………(15) ΔT f3 +66 .999 (Kgf) ......(16) In other words, if the different speed ratio between the third work roll and the fourth work roll 4 is increased by 0.01 for the purpose of reducing the third pass exit side plate thickness, the input side tension target value will be increased by 87.474 (Kgf). If the target tension value on the exit side is increased by 66.999 (Kgf), the variation in the thickness of the exit side in the first pass and the second pass will be suppressed to almost zero, and only the thickness on the exit side in the third pass will be thinned by 0.00595 mm. Become.
以上実施例に基づいて詳細に説明したように、
この発明では最終パス出側板厚を目標値に制御す
るために主機速度制御装置が制御している最終パ
スの上下作業ロールの異速比目標値を修正するに
さいし、この修正が第１パスおよび第２パスの出
側板厚へ与える影響を相殺するように入側張力目
標値と出側張力目標値とを修正するように構成し
たため、最終パス出側板厚精度を良好に制御する
ことができるという利点がある。
As explained above in detail based on the examples,
In this invention, when correcting the different speed ratio target value of the upper and lower work rolls of the final pass controlled by the main machine speed control device in order to control the final pass outlet side plate thickness to the target value, this correction is Since the entrance tension target value and the exit tension target value are modified to offset the influence of the second pass on the exit side plate thickness, the final pass exit side plate thickness accuracy can be well controlled. There are advantages.
図はこの発明が適用される１スタンド多パス圧
延機とこの発明の一実施例に係る板厚制御装置の
構成とを示すブロツク図である。
１〜４……作業ロール、１１……被圧延材料、
２０……入側張力制御装置、２１……出側張力制
御装置、２２……主機速度制御装置、２３……自
動板厚制御装置、２４……入出側張力目標値修正
量演算装置。
The figure is a block diagram showing the configuration of a one-stand multi-pass rolling mill to which the present invention is applied and a plate thickness control device according to an embodiment of the present invention. 1 to 4... Work roll, 11... Material to be rolled,
20... Entry side tension control device, 21... Output side tension control device, 22... Main engine speed control device, 23... Automatic plate thickness control device, 24... Input/output side tension target value correction amount calculation device.
Claims (1)
力を制御する入側張力制御系と、出側張力目標値
に基づいて前記被圧延材の出側張力を制御する出
側張力制御系と、複数の作業ロール間の異速比目
標値に基づいて前記複数の作業ロール間の回転速
度比を制御する板厚制御系とを具備してなる１ス
タンド多パス圧延機の板厚制御装置において、前
記板厚制御系から出力される最終パス作業ロール
の異速比目標値修正量ΔX3を入力し、入側張力目
標値修正量及び出側張力目標値修正量をそれぞれ
演算し、前記入側張力目標値修正量を前記入側張
力目標値に加算して前記入側張力制御系に出力
し、前記出側張力目標値修正量を前記出側張力目
標値に加算して前記出側張力制御系に出力する入
出側張力目標値修正量演算装置を設けたことを特
徴とする１スタンド多パス圧延機の板厚制御装
置。 ２ 前記入出側張力目標値修正量演算装置は、入
側張力目標値修正量ΔTb1及び出側張力目標値修
正量ΔTf3を次式 ΔTb1＝α・ΔX3 α：入側張力目標値修正量演算係数 ΔTf3＝β・ΔX3 β：出側張力目標値修正量演算係数 により演算することを特徴とする特許請求の範囲
第１項記載の１スタンド多パス圧延機の板厚制御
装置。[Scope of Claims] 1. An entry tension control system that controls the entry tension of the rolled material based on a target entry tension value, and an exit tension control system that controls the exit tension of the rolled material based on the exit tension target value. and a plate thickness control system that controls the rotational speed ratio between the plurality of work rolls based on a different speed ratio target value between the plurality of work rolls. In the plate thickness control device of the machine, the different speed ratio target value correction amount ΔX 3 of the final pass work roll output from the plate thickness control system is input, and the input side tension target value correction amount and the output side tension target value correction amount are input. are calculated, the correction amount of the input side tension target value is added to the input side tension target value, and the result is output to the input side tension control system, and the said output side tension target value correction amount is added to the output side tension target value. 1. A plate thickness control device for a one-stand multi-pass rolling mill, characterized in that an input/output side tension target value correction amount calculating device is provided for adding up and outputting the result to the exit side tension control system. 2 The input/output side tension target value correction amount calculation device calculates the input side tension target value correction amount ΔT b1 and the output side tension target value correction amount ΔT f3 using the following formula ΔT b1 = α・ΔX 3 α: Input side tension target value A plate thickness control device for a one-stand multi-pass rolling mill according to claim 1, characterized in that correction amount calculation coefficient ΔT f3 =β・ΔX 3 β: Calculation is performed using a correction amount calculation coefficient for output side tension target value. .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59167577A JPS6146312A (en) | 1984-08-10 | 1984-08-10 | Sheet thickness control device of single stand multi-pass rolling mill |
| DE8585109829T DE3580137D1 (en) | 1984-08-10 | 1985-08-05 | METHOD AND SYSTEM FOR THICKNESS CONTROL IN A UNIQUE MULTI-STICK MILLING MILL. |
| EP85109829A EP0171732B1 (en) | 1984-08-10 | 1985-08-05 | Thickness control method and system for a single-stand/multi-pass rolling mill |
| US06/763,678 US4665729A (en) | 1984-08-10 | 1985-08-08 | Thickness control method and system for a single-stand/multi-pass rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59167577A JPS6146312A (en) | 1984-08-10 | 1984-08-10 | Sheet thickness control device of single stand multi-pass rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6146312A JPS6146312A (en) | 1986-03-06 |
| JPH0234243B2 true JPH0234243B2 (en) | 1990-08-02 |
Family
ID=15852323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59167577A Granted JPS6146312A (en) | 1984-08-10 | 1984-08-10 | Sheet thickness control device of single stand multi-pass rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146312A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064163B2 (en) * | 1986-12-26 | 1994-01-19 | 新日本製鐵株式会社 | One-stand multi-pass rolling mill and rolling method |
| JPH072413B2 (en) * | 1988-07-06 | 1995-01-18 | イビデン株式会社 | Metallic melamine resin decorative board |
-
1984
- 1984-08-10 JP JP59167577A patent/JPS6146312A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6146312A (en) | 1986-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4506197A (en) | Method of controlling mill motors speeds in a cold tandem mill | |
| JP2000312909A (en) | Plate width controller | |
| US3603124A (en) | Computer control system for rolling metal strips using feed-forward and prediction | |
| US4625536A (en) | Method of controlling unequal circumferential speed rolling | |
| JPH0234243B2 (en) | ||
| US4063438A (en) | Method of controlling tandem rolling mills | |
| US4665729A (en) | Thickness control method and system for a single-stand/multi-pass rolling mill | |
| JP3506119B2 (en) | Method of changing rolling load distribution of tandem rolling mill | |
| JPS6146311A (en) | Sheet thickness control device of single stand multi-pass rolling mill | |
| JPH0234246B2 (en) | ||
| JPH1015607A (en) | Controller for cold-rolling mill | |
| JPH0347613A (en) | Thickness control device for cold tandem mill | |
| JP2540165B2 (en) | Front and back color tone control device for rolled material | |
| JPH0227046B2 (en) | ||
| JPH0262327B2 (en) | ||
| JPS61259815A (en) | Meandering motion control method for strip | |
| JPS61259816A (en) | Meandering motion control method for strip rolling | |
| JPS5858908A (en) | Controlling method for tandem rolling mill | |
| JPH0732021A (en) | Controller for continuous hot rolling mill | |
| JPH06142736A (en) | Speed controller of tandem roller | |
| JPH10263646A (en) | Method for controlling sheet thickness in hot continuous rolling mill | |
| JPS641211B2 (en) | ||
| JPH0516926B2 (en) | ||
| JPH0775831A (en) | Winding guide controller for rolling | |
| JPS62156010A (en) | Method for controlling width of continuous rolling mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |