JPH023642B2 - - Google Patents
Info
- Publication number
- JPH023642B2 JPH023642B2 JP60227687A JP22768785A JPH023642B2 JP H023642 B2 JPH023642 B2 JP H023642B2 JP 60227687 A JP60227687 A JP 60227687A JP 22768785 A JP22768785 A JP 22768785A JP H023642 B2 JPH023642 B2 JP H023642B2
- Authority
- JP
- Japan
- Prior art keywords
- roll gap
- roll
- correction value
- value
- rolling
- 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
- 238000012937 correction Methods 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000005259 measurement 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
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/60—Roll-force control; Roll-gap control by control of a motor which drives an adjusting screw
-
- 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
- B21B2261/04—Thickness, gauge
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、圧延システムに係り、所定の板厚を
得るためのロールギヤツプ制御方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rolling system, and relates to a roll gap control method for obtaining a predetermined sheet thickness.
一般に圧延システムにおいては、所定の出側板
厚値の圧延材を得るためにロールギヤツプ（圧下
開度）設定値を演算して所定のロールギヤツプ長
に設定制御を行うという方法をとつている。
Generally, in a rolling system, a method is used in which a roll gap (rolling opening) set value is calculated and the roll gap length is set to a predetermined value in order to obtain a rolled material having a predetermined outlet thickness value.
ロールギヤツプ長設定値の演算式は、次式によ
つて示される。 The calculation formula for the roll gap length setting value is shown by the following formula.
SS＝ｈ−Ｐ／Ｍ＋PZ／MZ＋ΔS (1)
但し、
SS：ロールギヤツプ設定値 （mm）
ｈ：圧延材料の圧延後の板厚値 （mm）
Ｐ：圧延時の荷重 （ton）
Ｍ：圧延時のミル定数 （ton／mm）
PZ：零調時の荷重 （ton）
MZ：零調時のミル定数 （ton／mm）
ΔS：ロールギヤツプ補正値 （mm）
(1)式において、ΔS（ロールギヤツプ補正値）
は、主にロールの熱膨張に起因するもので一般に
正の値となり、ロール替による零調後の圧延によ
り一定値にて収束する。 S S =h-P/M+P Z /M Z +ΔS (1) However, S S : Roll gap setting value (mm) h: Thickness value of rolled material after rolling (mm) P: Load during rolling (ton) M: Mill constant during rolling (ton/mm) P Z : Load at zero adjustment (ton) M Z : Mill constant at zero adjustment (ton/mm) ΔS: Roll gap correction value (mm) In formula (1) , ΔS (roll gap correction value)
is mainly caused by the thermal expansion of the rolls and is generally a positive value, and converges to a constant value by rolling after zero adjustment by changing the rolls.
ロールの熱膨張は一般に第３図に示すように変
化する。この主に熱膨張に起因するロール径の変
化は、一般に直接測定することができない。その
ため(1)式の逆算式を用いて圧延中の実測データよ
り、ロールギヤツプ補正値を求め、次材料圧延の
ロールギヤツプ長演算に活用するという方法をと
つている。 The thermal expansion of the roll generally varies as shown in FIG. This change in roll diameter, which is mainly due to thermal expansion, cannot generally be measured directly. Therefore, a method is used in which the roll gap correction value is determined from the actual measurement data during rolling using the back calculation formula of equation (1), and is utilized for calculating the roll gap length for the next material rolling.
このことは次式により示される。 This is shown by the following equation.
ΔSR＝SS−ｈ＋Ｐ／Ｍ−PZ／MZ (2)
但し
ΔSR：(1)式の逆算式により求められたロールギ
ヤツプ補正値
従来はこの補正値を一次平滑によりフイルタリ
ングを行い、次材料圧延への設定に活用してい
る。ΔS R =S S −h+P/M−P Z ／M Z (2) However, ΔS R : Roll gap correction value obtained by inverse calculation of equation (1) Conventionally, this correction value was filtered by first-order smoothing. It is used for setting up the next material rolling.
ΔSNEW＝ΔSOLD＋α（ΔSR−ΔSOLD） (3)
但し
ΔSNEW：一次平滑後のロールギヤツプ補正値
ΔSOLD：ロールギヤツプ補正前回値
α：一次平滑ゲイン
一般に(3)式で使用する一次平滑ゲインαは、固
定となつている。そのためにロールギヤツプ補正
値は第４図に示すように、その収束はロールの熱
膨張の収束に比べ遅くなるという欠点があつた。ΔS NEW = ΔS OLD + α (ΔS R −ΔS OLD ) (3) However, ΔS NEW : Roll gap correction value after primary smoothing ΔS OLD : Previous roll gap correction value α: Primary smoothing gain Primary smoothing gain generally used in equation (3) α is fixed. Therefore, as shown in FIG. 4, the roll gap correction value converges more slowly than the convergence of the thermal expansion of the roll.
本発明は、上記の欠点を解消するためになされ
たものであり、ロールギヤツプ設定値制御におい
て、ロールギヤツプ補正値の収束を速めるロール
ギヤツプ制御方法を提供することを目的とする。
The present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a roll gap control method that speeds up the convergence of a roll gap correction value in roll gap setting value control.
本発明は被圧延材料をロール間を圧延通過させ
所定板厚値の圧延材を得る圧延システムにおい
て、ロールの熱膨張に伴うロールギヤツプ長の補
正はこの補正値の前回値と今回値を比較すること
によりロール制御のゲインを増減させることによ
り行うことを特徴とする。
The present invention is a rolling system in which a rolled material is passed between rolls to obtain a rolled material having a predetermined thickness, and the roll gap length due to thermal expansion of the rolls is corrected by comparing the previous value and current value of this correction value. The feature is that this is performed by increasing/decreasing the gain of roll control.
以下、本発明の一実施例を図面を参照して説明
する。第１図において、被圧延材料１はロール２
間を通過し圧延される。ロールギヤツプ長は圧下
位置検出装置３により検出、設定される。又、ロ
ール２には荷重検出装置４が接続されている。ロ
ール２の圧延材料１の出側には板厚測定計５が設
けられる。ロールギヤツプ長、圧延時荷重、出側
板厚値の情報は制御演算装置６へ伝送される。
尚、制御演算装置６には予め、圧延時及び零調時
のミル定数及び零調時荷重の情報が入力されてい
る。
Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the material to be rolled 1 is rolled by the roll 2.
It passes through the gap and is rolled. The roll gap length is detected and set by the rolling position detection device 3. Further, a load detection device 4 is connected to the roll 2. A plate thickness meter 5 is provided on the exit side of the roll 2 from which the rolled material 1 is delivered. Information on the roll gap length, rolling load, and exit plate thickness value is transmitted to the control calculation device 6.
Note that information on the mill constant during rolling and at zero adjustment and the load at zero adjustment is input into the control calculation device 6 in advance.
以上の構成において、ロールギヤツプ長の設定
において、制御演算装置１によりまず(2)式が計算
されてロールギヤツプ補正逆算値ΔSRが計算され
る。 In the above configuration, in setting the roll gap length, the control calculation device 1 first calculates equation (2) to calculate the roll gap correction back calculation value ΔS R.
次にこのロールギヤツプ補正値ΔSRと前回のロ
ールギヤツプ補正値を比較し、(3)式で使用するた
めのゲインの選択を行う。 Next, this roll gap correction value ΔS R is compared with the previous roll gap correction value, and a gain to be used in equation (3) is selected.
このことは以下の式により表現される。 This is expressed by the following formula.
α＝ａ （ΔSR−ΔSOLD＞０） (4)
α＝ｂ （ΔSR−ΔSOLD０） (5)
ａ＞ｂ＜０ (6)
(4)〜(6)式により選択されたゲインを使用して(3)
式のロールギヤツプ補正値制御を行う。 α=a (ΔS R −ΔS OLD >0) (4) α=b (ΔS R −ΔS OLD 0) (5) a>b<0 (6) Gain selected by equations (4) to (6) using(3)
Performs roll gap correction value control using the formula.
これによると本来熱膨張により徐々に増加する
という理論に合致する(4)式の場合にはゲインが大
きくなり学習効果が大きく反映される。逆に理論
に合致しない(5)式の場合にはゲインが小さくなり
学習効果は小さく反映される。 According to this, in the case of equation (4), which agrees with the theory that the gain gradually increases due to thermal expansion, the gain becomes large and the learning effect is largely reflected. Conversely, if equation (5) does not match the theory, the gain will be small and the learning effect will be reflected to a small extent.
この方法を適用した場合には、第２図のように
なり、ロールギヤツプ設定値の補正値は、ロール
の熱膨張量の履歴に近づき、さらには収束も、従
来の場合よりも速くなり、ロールの熱膨張の収束
に近づけることができる。 When this method is applied, the result will be as shown in Figure 2, and the correction value of the roll gap setting value will approach the history of the amount of thermal expansion of the roll, and convergence will be faster than in the conventional case. It is possible to approach the convergence of thermal expansion.
以上説明したように、本発明のロールギヤツプ
制御方法によれば、ロールギヤツプの補正値制御
がロールの熱膨張のスピードに近づいて、収束が
速くなるため、ロールギヤツプ長の設定を適切に
行うことができる。
As explained above, according to the roll gap control method of the present invention, the roll gap correction value control approaches the speed of thermal expansion of the roll and converges quickly, so that the roll gap length can be appropriately set.
第１図は本発明の一実施例に係る圧延システム
のブロツク構成図、第２図は本発明の一実施例に
係るロールギヤツプ補正値の収束状態説明図、第
３図はロールの熱膨張の変化図、第４図は従来方
法によるロールギヤツプ補正値の収束状態説明図
である。
１……圧延材料、２……ロール、３……圧下位
置検出装置、４……荷重検出装置、５……板厚測
定計、６……演算制御装置。
Fig. 1 is a block configuration diagram of a rolling system according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the convergence state of the roll gap correction value according to an embodiment of the present invention, and Fig. 3 is a change in thermal expansion of the roll. FIG. 4 is an explanatory diagram of the convergence state of the roll gap correction value according to the conventional method. DESCRIPTION OF SYMBOLS 1... Rolling material, 2... Roll, 3... Rolling position detection device, 4... Load detection device, 5... Plate thickness measuring meter, 6... Arithmetic control device.
Claims (1)
厚値の圧延材を得る圧延システムにおいて、ロー
ルの熱膨張に伴うロールギヤツプ長の補正はこの
補正値の前回値と今回値を比較することによりロ
ール制御のゲインを増減させることにより行うこ
とを特徴とするロールギヤツプ制御方法。1. In a rolling system that passes the material to be rolled between rolls to obtain a rolled material with a predetermined thickness value, the roll gap length can be corrected due to thermal expansion of the rolls by comparing the previous and current correction values. A roll gap control method characterized in that it is performed by increasing or decreasing a control gain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227687A JPS6289517A (en) | 1985-10-15 | 1985-10-15 | Control method for roll gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227687A JPS6289517A (en) | 1985-10-15 | 1985-10-15 | Control method for roll gap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6289517A JPS6289517A (en) | 1987-04-24 |
| JPH023642B2 true JPH023642B2 (en) | 1990-01-24 |
Family
ID=16864760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60227687A Granted JPS6289517A (en) | 1985-10-15 | 1985-10-15 | Control method for roll gap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6289517A (en) |
-
1985
- 1985-10-15 JP JP60227687A patent/JPS6289517A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6289517A (en) | 1987-04-24 |
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