JP2807555B2 - Automatic thickness control method - Google Patents
Automatic thickness control methodInfo
- Publication number
- JP2807555B2 JP2807555B2 JP2220509A JP22050990A JP2807555B2 JP 2807555 B2 JP2807555 B2 JP 2807555B2 JP 2220509 A JP2220509 A JP 2220509A JP 22050990 A JP22050990 A JP 22050990A JP 2807555 B2 JP2807555 B2 JP 2807555B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- load
- thickness
- control method
- mill
- 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
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
-
- 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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、蛇行制御を考慮した圧延機の自動板厚制御
方法に関し、ことに製品板厚の確保と板の蛇行防止を同
時に満足する自動板厚制御方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sheet thickness control method for a rolling mill in consideration of meandering control, and more particularly, to an automatic sheet thickness control that simultaneously satisfies securing of a product sheet thickness and prevention of sheet meandering. It relates to a control method.
従来技術 鋼板の圧延時、鋼板の蛇行が発生すると、板がサイド
ガイド装置等に当たり、まくられて絞り込み、ミスロー
ルが発生する。この問題に対処するため、従来行われて
来た方法に差荷重制御がある。この方法は操作側WSの荷
重FWと駆動側DSの荷重FDの差荷重FW−FDを求めてこれを
メモリーし、圧延中、この差荷重が一定となるように操
作側と駆動側の圧下位置を修正することにより行われる
ものである。2. Description of the Related Art During the rolling of a steel sheet, if the steel sheet meanders, the sheet hits a side guide device or the like, is rolled and narrowed, and a misroll occurs. In order to address this problem, there has been a differential load control in a method which has been conventionally performed. The method which was memory seeking differential load F W -F D of the load F D of the load F W and the driving side DS of the operating side WS, during rolling, an operation side as the difference load is constant driving This is performed by correcting the rolling position on the side.
発明が解決しようとする課題 差荷重制御によれば、圧延中荷重レベルの変動がなけ
れば、蛇行することなくそのまゝの状態が持続するが、
コイルエンドなど急激な荷重レベルの変化があると、蛇
行が発生する。これは荷重レベルの変動があると、操作
側と駆動側の圧下率に差が生じることが原因と考えられ
る。Problems to be Solved by the Invention According to the differential load control, if there is no change in the load level during rolling, the same state is maintained without meandering,
If there is a sudden change in the load level such as a coil end, meandering occurs. This is considered to be caused by a difference in the rolling reduction between the operating side and the driving side when the load level fluctuates.
本発明は、操作側と駆動側の圧下率を一定にして荷重
レベルに変動があっても板の蛇行を防止し、製品板厚の
確保ができるようにしたものである。The present invention is intended to prevent the plate from meandering even when the load level fluctuates and to secure the product plate thickness by keeping the reduction ratio of the operation side and the drive side constant.
課題の解決手段 すなわち本発明は、操作側と駆動側の各々において、
各側の圧下率が一定で、かつセンター板厚が目標板厚と
なるように圧下位置を制御するものである。Means for Solving the Problems That is, in the present invention, on each of the operation side and the drive side,
The rolling position is controlled so that the rolling reduction on each side is constant and the center plate thickness becomes the target plate thickness.
作用 第２図に示すように、入側におけるWS、センター位置
及びDSの板厚をそれぞれHW、HC及びHDとし、出側におけ
る各板厚をそれぞれhw、hc及びhDとし、WS及びDSの圧下
率をそれぞれrw、rDとすると、 rw＝（Hw−hw）/Hw rD＝（HD−hD）/HD よってWS及びDSの圧下率を一定にするには次式を満足
すればよい。As shown in FIG. 2 action, and WS, the plate thickness of the center position and DS respectively H W, and H C and H D in the entry side, out of the respective plate thickness at the side and h w, h c and h D, respectively the reduction ratio of the WS and DS, respectively r w, When r D, r w = (H w -h w) / H w r D = reduction ratio (H D -h D) / H D Therefore WS and DS In order to make constant, the following equation should be satisfied.
（Hw−hw）/Hw＝（HD−hD）/HD ……（１） （１）式を満たすためWS及びDSでそれぞれ圧下修正を
行ったときの出側板厚hw、hDをは次式で求められる。 (H w -h w) / H w = (H D -h D) / H D ...... (1) (1) delivery side thickness h w when performing each rolling fixed in WS and DS to satisfy the equation , H D can be obtained by the following equation.
hw＝（Sw＋ΔSw）＋Spw hD＝（SD＋ΔSD）＋SpD 但し、 ここで、mW及びmDはそれぞれFW及びFDを関数とするミ
ル曲線である。またSpW及びSpDはミル伸び（ミルをバネ
系としてみたとき、荷重がかゝることにより発生するロ
ールギャップの発生量）であり、Ｑは板の塑性係数であ
る。h w = (S w + ΔS w ) + S pw h D = (S D + ΔS D ) + S pD where Here, m W and m D are mills curve as a function of F W and F D, respectively. S pW and S pD are mill elongation (the amount of roll gap generated when a load is applied when the mill is viewed as a spring system), and Q is the plastic coefficient of the plate.
これらを（１）式に代入して整理すると、 ここで とおくと、（３）式は Ａ＋ＢΔSw＝Ｃ＋ＤΔSD と表わされ、自動板厚制御による必要圧下量をΔＳとす
ると、 ΔＳ＝（ΔSw＋ΔSD）/2 ……（４） （３）及び（４）式より 以上のようにしてWS及びDSの圧下率を一定にし、かつ
センターの板厚を確保するために要する圧下位置修正量
ΔSw及びΔSDが求まる。Substituting these into equation (1) and rearranging, here Putting a, (3) is expressed as A + BΔS w = C + DΔS D, When [Delta] S the required reduction amount of automatic gauge control, ΔS = (ΔS w + ΔS D) / 2 ...... (4) (3) And from equation (4) Above manner and the rolling reduction of the WS and DS constant and pressing position correction amount [Delta] S w and [Delta] S D required to secure the thickness of the center is obtained.
実施例 各スタンドの圧延ロール１には、WSとDSにそれぞれ油
圧ジャッキよりなる圧下装置2w、2Dと、圧下位置検出装
置3w、3Dと、ロードセル4w、4Dが設けており、圧下位置
検出装置3w、3Dにより計測された圧下位置と、ロードセ
ル4W、4Dにより計測された圧延荷重とがコントローラ５
に入力され、コントーラ５は上記（４）及び（５）式に
よりWSの圧下修正量ΔSw及びDSの圧下修正量ΔSDを演算
し、これに基づいて圧下装置2w、2Dに制御信号を出力す
る。The rolling roll 1 of each stand is provided with rolling-down devices 2 w and 2 D , each composed of a hydraulic jack in WS and DS, rolling-down position detecting devices 3 w and 3 D , and load cells 4 w and 4 D , respectively. The rolling position measured by the rolling position detecting devices 3 w and 3 D and the rolling load measured by the load cells 4 W and 4 D are stored in the controller 5.
The controller 5 calculates the reduction amount ΔS w of the WS and the reduction amount ΔS D of the DS according to the above equations (4) and (5), and, based on the calculated values, sends control signals to the reduction units 2 w and 2 D. Is output.
コントローラ５はまた、出側の厚み計（図示しない）
より入力された板厚より目標板厚との偏差を算出し、各
スタンドに配分される圧下位置の修正量を演算するが、
ΔSw及びSDの演算時において用いられるSW及びSDは、次
段スタンドの圧下位置フイードバック値及びオフセット
値より求められるWS及びDSの実ギャップの推定値が使用
される。The controller 5 also has a thickness gauge (not shown) on the delivery side.
The deviation from the target plate thickness is calculated from the input plate thickness, and the correction amount of the rolling position distributed to each stand is calculated.
SW and SD are used during operation of [Delta] S w and S D are estimated value of the actual gap of WS and DS obtained from the pressing position feedback value and the offset value of the next stand is used.
また、Hw及びHDは、前段スタンドのロードセル及び圧
下位置からゲージメータ式によりWS及びDSの板厚を求め
て次段スタンドまでトラッキングを行い、次段スタンド
噛込み時の実績と同一点のHw及びHDを用いる。In addition, H w and H D performs the tracking to the next stage stand in search of the plate thickness of the WS and DS by the gauge meter equation from the load cell and the pressure position of the previous stand, at the time included the next stage stand engage achievements and of the same point using the H w and H D.
ミル定数Mw、MDは荷重実績Fw、FD付近のミル定数Mw、
MDをミル曲線より線型補間して求められる。The mill constants M w and M D are the actual load F w and the mill constant M w near the F D ,
The M D from mill curve obtained by linear interpolation.
発明の効果 本発明は以上のように、操作側と駆動側の圧下率を一
定にし、かつセンター板厚が目標板厚となるように操作
側と駆動側の圧下位置を制御するようにしたもので、急
激な荷重レベルの変動があっても板の蛇行が防止され、
所定の製品板厚を確保することができる。Advantageous Effects of the Invention As described above, the present invention is designed to make the rolling reduction on the operating side and the driving side constant, and to control the rolling position on the operating side and the driving side so that the center plate thickness becomes the target plate thickness. Therefore, even if there is a sudden change in the load level, meandering of the plate is prevented,
A predetermined product plate thickness can be secured.
第１図は本発明方法の模式図、第２図は入側及び出側の
板厚を示す図である。 １……圧延ロール、2w、2D……圧下位置 3w、3D……圧下位置検出装置 4w、4D……ロードセル、５……コントローラFIG. 1 is a schematic diagram of the method of the present invention, and FIG. 2 is a diagram showing the thickness of the entrance side and the exit side. 1 ...... rolling rolls, 2 w, 2 D ...... pressing position 3 w, 3 D ...... pressing position detecting device 4 w, 4 D ...... load cell, 5 ...... controller
Claims (2)
下率が一定で、かつセンター板厚が目標板厚となるよう
に圧下位置を制御することを特徴とする自動板厚制御方
法。1. An automatic thickness control method comprising: controlling a rolling position on each of an operation side and a driving side such that a reduction ratio of each side is constant and a center thickness becomes a target thickness. .
特徴とする請求項１記載の自動板厚制御方法。 ここで であり、HW及びHDは入側のWS及びDSの板厚、SW及びSDは
WS及びDSのロールギャップ現在値、MW及びMDはWS及びDS
のミル定数、FW及びFDはWS及びDSの圧延荷重重現値、mW
及びmDは荷重を関数とするWS及びDSののミル曲線、Ｑは
塑性係数である。2. The method according to claim 1, wherein the pressing position is corrected based on the following equation. here , And the thickness of the H W and H D is the entry side of the WS and DS, S W and S D is
Roll gap current value of the WS and DS, M W and M D is WS and DS
The mill modulus, F W and F D is the rolling load heavy current value of WS and DS, m W
And m D are the mill curves of WS and DS as a function of load, and Q is the plastic modulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220509A JP2807555B2 (en) | 1990-08-21 | 1990-08-21 | Automatic thickness control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220509A JP2807555B2 (en) | 1990-08-21 | 1990-08-21 | Automatic thickness control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04100626A JPH04100626A (en) | 1992-04-02 |
| JP2807555B2 true JP2807555B2 (en) | 1998-10-08 |
Family
ID=16752142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2220509A Expired - Lifetime JP2807555B2 (en) | 1990-08-21 | 1990-08-21 | Automatic thickness control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2807555B2 (en) |
-
1990
- 1990-08-21 JP JP2220509A patent/JP2807555B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04100626A (en) | 1992-04-02 |
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