JPS59178117A - Method for controlling sheet thickness in rolling mill - Google Patents

Method for controlling sheet thickness in rolling mill

Info

Publication number
JPS59178117A
JPS59178117A JP58051452A JP5145283A JPS59178117A JP S59178117 A JPS59178117 A JP S59178117A JP 58051452 A JP58051452 A JP 58051452A JP 5145283 A JP5145283 A JP 5145283A JP S59178117 A JPS59178117 A JP S59178117A
Authority
JP
Japan
Prior art keywords
rolling
agc
reaction force
rolling reaction
predicted
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
Application number
JP58051452A
Other languages
Japanese (ja)
Other versions
JPH0126768B2 (en
Inventor
Hideyuki Kiyohara
英之 清原
Hiromi Matsumoto
松本 紘美
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP58051452A priority Critical patent/JPS59178117A/en
Publication of JPS59178117A publication Critical patent/JPS59178117A/en
Publication of JPH0126768B2 publication Critical patent/JPH0126768B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58Roll-force control; Roll-gap control
    • B21B37/62Roll-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)

Abstract

PURPOSE:To roll a material stably without causing the meandering thereof and to reduce the capacity of a hydraulic unit by estimating a rolling reaction and controlling the rolling specifically, in controlling it under an absolute value AGC. CONSTITUTION:A rolling reaction is estimated before rolling a material, and a roll gap is previously squeezed by the stretching portion of a mill corresponding to the estimated rolling reaction P0, and the roll gap is squeezed by a quantity proportional to the rolling reaction immediately after the biting of the material by the operation of an AGC. At the same time, the operating portion of the AGC corresponding to the P0 is canceled, as a result, the operating quantity of AGC is made to the quantity proportional to the difference between an estimated load and an acutual one.

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7=J
値ΔGCと絶対値AGCとがある。本発明はこの絶苅<
im、 A G CK関するものである。
In the thickness control device of a conventional rolling mill, phase 7 = J
There is a value ΔGC and an absolute value AGC. The present invention is based on this
im, it's about AG CK.

相対値AG−C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。
The relative value AG-C is a control that reduces plate thickness variation based on a certain plate thickness after the plate has bitten.

これに対し、絶対値AGCは目標板厚を圧延111Jの
ロールギャップと一致させ、目標板厚を得るために材料
噛み込み後のロールギャップを圧延前の値と同じになる
ように圧延反力ににる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。
On the other hand, the absolute value AGC makes the target plate thickness match the roll gap of rolling 111J, and in order to obtain the target plate thickness, the rolling reaction force is adjusted so that the roll gap after material bite is the same as the value before rolling. This is a control method that uses a rolling down mechanism to compensate for the elongation of the mill.

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X。とする。ミル定数をに、圧延反
力Pとすると、制御−ルファクターでO≦SF≦1の任
意の値である。
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. Mill elongation
The control amount corresponding to is X. shall be. Letting the mill constant be , and the rolling reaction force P, the control factor is an arbitrary value of O≦SF≦1.

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。5F=1のときx 、 −Xとな
る。現実には、SF=]−とじ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。
The larger the SF value, the closer the plate thickness is to the target plate thickness, but control tends to become unstable. When 5F=1, x becomes -X. In reality, control becomes impossible if SF=]- is closed, so the actual value is smaller than this.

この制御量X。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x。なたとえば油圧々下装置!/こてこtlを補な、
r6うとすると、材1の噛み込み時の、tめだけに、非
常に大きな容儀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−気にX だけロールギャップを変
化させると、材料が蛇行する等、圧延が不安定となる。
This control amount X. If this is not corrected in a short period of time, off-gauge will increase. However, the control amount x actually corresponds to the elongation of the mill. For example, hydraulic equipment! / Complement Koteko TL,
If the material 1 were to be bitten, a very large hydraulic system would be required, which would be uneconomical and impractical. Furthermore, if the roll gap is changed by -x, the rolling becomes unstable, such as meandering of the material.

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、用延前に圧延反力を予測しロール
ギャッ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ャップをしめこ
んでおき、材料がロールに噛みこんだ直01にAGCの
作動により圧延反力に比例した:T1だけロールギャッ
プをしめ込む。それと同時に予測圧延反力((相当する
AGC動作分をキャンセル1〜、結果的にAGC動作量
を予測荷重と実際の背中との差眞比例した1だけにする
ことを特徴とする厚み制御方法である。
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 (corresponding to the predicted rolling reaction force). The roll gap is tightened in advance by an amount (predicted value), and immediately after the material is bitten into the roll, the AGC is activated to tighten the roll gap by an amount T1 proportional to the rolling reaction force. At the same time, a thickness control method characterized by canceling the predicted rolling reaction force ((1) by canceling the corresponding AGC operation amount and, as a result, reducing the AGC operation amount to only 1, which is exactly proportional to the difference between the predicted load and the actual back. be.

次に図面を用いて詳細に説明する。Next, it will be explained in detail using the drawings.

第1図と第2図に本発明の実施例を示す。An embodiment of the present invention is 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1ら
11る圧延反力である。Po 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
的にインプットされるようにしておくと便利である。
In FIG. 1, P is the rolling reaction force actually obtained by a load cell or the like. Po 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 automatically input.

Kはミル定数、SFはスケールファクタであり、4の演
算増幅器の出側での指令値Xは (P−Po)XSF で表わされる。この値が本発明の制御によるラドの動作
儀である。
K is a Mill constant, SF is a scale factor, and the command value X at the output side of the operational amplifier 4 is expressed as (P-Po)XSF. This value is the RAD operation according to the control of the present invention.

5は本制御をONまたはOFFするスイッチであり、手
動でも自動でもよい。
5 is a switch for turning on or off this control, and it may be operated manually or automatically.

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、沈み込んだ位置でう” (−Q lfq ’r3安
定させる制御である。
6 is a sinking correction control mechanism. The sinking correction control is a control that stabilizes the ram by sinking due to the elasticity of the oil and stabilizing the ram at the sunken position immediately after the plate is bitten.

この補正量をLであられす。この制御は1ζ1接本発明
とは関係ない。
This correction amount is L. This control is not related to the present invention.

7はタイミングスイッチである。材不斗がロールにかみ
込んでいる間だけONとなるスイッチである。つまりメ
タルインでONL、てメタルオフてOFFになるスイッ
チである。
7 is a timing switch. This switch is ON only while Zaifuto is biting into the roll. In other words, it is a switch that turns ON when metal is in, and turns OFF when metal is turned off.

8はラド、の設定基準器であり、φはラムの設定基準イ
直である。
8 is a setting standard for Rad, and φ is a setting standard for Ram.

りは一す−ボバルプアンプ、10はサーボ/くルブ、1
1は/す/りm−,12はラムである。10のサーボ゛
)(で、(7,る。第2図には本発明の簡易実施例を示
す。
Ri is one - Bobalp amplifier, 10 is servo/club, 1
1 is /su/rim-, 12 is ram. 10 servos) (and (7, 1). Fig. 2 shows a simple embodiment of the present invention.

でkわさ汎る。It's so popular.

1.1は旧算磯(プロセスコントローラ)であり、ここ
でラド・設定基準値■φ、予測圧延反力P。、沈め込み
補lI:、量りをもらいてサーボバルブ10への一ボバ
ルブ10への指令値x2は −Cある。第1図の値と一致する。
1.1 is the old Saniso (process controller), where Rad/set reference value ■φ and predicted rolling reaction force P. , Submergence compensation lI: , After receiving the scale, the command value x2 to the servo valve 10 is -C. 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偕シl
である。
15 is a timing chart indicating metal in and metal off.
It is.

、−のIn)易実施例のメリットはAGCのアナログ回
路が比例のみて簡単である点である。ただし割算4機が
−の値を知っておくことが必要である。
, - In) The advantage of the simple embodiment is that the AGC analog circuit is proportionally simpler. However, it is necessary for the four division machines to know the negative value.

第3図は簡易実施例を行なっ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
方向がロールギャッ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ズ・J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に
でわっ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 when a simple embodiment is carried out. The positive direction of the vertical axis is the direction in which the roll gap is tightened. Other deformations are possible, but the point is that when performing absolute Z/J value AGC, the ram should only move by an amount proportional to the difference between the actual rolling reaction force and the predicted rolling reaction force multiplied by the Mill constant. The essence of the present invention is to configure the following.

第4図に本発明の効果を示す。FIG. 4 shows the effect 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
ギャップをしめ込む方向である。この場合は予測圧延反
力によるロールギャップのしめろみ分は、圧下スクリュ
ーにて、しめこんでいる。
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 roll gap is tightened by the reduction screw due to the predicted rolling reaction force.

また、沈み込み補正は行なっていないものとする。It is also assumed that no subsidence correction is performed.

つまりL=0である。本発明の制御方法を行lrハない
場合には、ラムはA線のように非常に犬きlC動きを示
す。
That is, L=0. If the control method of the present invention is not carried out, the ram exhibits a very sharp movement as shown in the A line.

旧、C線は、本発明の制御を行なった場合な示す。B線
においてa。は予測圧延反力が実圧延反力どの差によっ
て生じたもので、予測値圧延反力が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。
The old line C shows the case where the control of the present invention is performed. a on the B line. is caused by the difference between the predicted rolling reaction force and the actual rolling reaction force, and if the predicted rolling reaction force matches the actual rolling reaction force, the ram hardly moves as shown in line C.

したがって絶対値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、油圧ユニットの容厳も従
来に比較して非常に小さくできる効果がある。
Therefore, it is possible to satisfy the purpose of the absolute value AGC, to achieve stable rolling without meandering of the material, and to make the pressure on the hydraulic unit much smaller than in the past.

【図面の簡単な説明】[Brief explanation of the drawing]

第11図と第2図は本発明の実施例のブロック図を示す
。第3図は第2図の実施例における計算機の位It指令
を示している。第4図は、本発明の効果な示すラムの動
きをあられしたものである。 1・・ロードセル等による実際の圧延反力検出器、2・
・−泪算機等の予測圧延反力の外部入力信号器、:3・
・演鎧増幅器、 4・・・演算増幅器、  5・・−A
GCをON、OFFするスイッチ、  6・・−沈み込
み補正値の外部入力信号器、  7・・・タイミングス
イッチ、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(油圧ンリンター)、 12・・ラム、 13
・・・演算増幅器、 】、1・・計算機(プロセスコン
トロー7−)、15・・メタルイン、メタルオフのタイ
ミングスイッチ。 特許出願人 代理人 弁理士 矢 葺 知 之 (ほか]−名)
11 and 2 show block diagrams of embodiments of the invention. FIG. 3 shows the digit It 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 load cell etc., 2.
・- External input signal device for predicted rolling reaction force such as a calculator, etc.: 3・
・Armor amplifier, 4... operational amplifier, 5...-A
GC ON/OFF switch, 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 linter), 12... Ram, 13
...Operation amplifier, ], 1.. Computer (process controller 7-), 15.. Metal-in, metal-off timing switch. Patent applicant Representative patent attorney Tomoyuki Yafuki (and others)

Claims (1)

【特許請求の範囲】[Claims] 厚み目標値を与えて材料の板厚制御を行なう圧延機にお
いて圧延反力とミル定数を用い、目標板jワを得る絶ズ
・j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ャッ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
動作中ャンセルし、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。
In a rolling mill that controls the thickness of a material by giving a target thickness value, the rolling reaction force and mill constant are used to predict the rolling reaction force before rolling when performing absolute gap/j value AGC to obtain the target sheet jwa. , only the predicted mill elongation value corresponding to this predicted rolling reaction force,
Tighten the roll gap in advance and at the same time start the AGC operation, cancel the AGC operation corresponding to the predicted rolling reaction force, and make the AGC operation amount only proportional to the difference between the predicted load and the actual load. Features a thickness control method for rolling mills.
JP58051452A 1983-03-29 1983-03-29 Method for controlling sheet thickness in rolling mill Granted JPS59178117A (en)

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 true JPS59178117A (en) 1984-10-09
JPH0126768B2 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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
JPH0126768B2 (en) 1989-05-25

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