JPS63171213A - Method for detecting meandering amount of rolled stock - Google Patents
Method for detecting meandering amount of rolled stockInfo
- Publication number
- JPS63171213A JPS63171213A JP62001006A JP100687A JPS63171213A JP S63171213 A JPS63171213 A JP S63171213A JP 62001006 A JP62001006 A JP 62001006A JP 100687 A JP100687 A JP 100687A JP S63171213 A JPS63171213 A JP S63171213A
- Authority
- JP
- Japan
- Prior art keywords
- meandering
- rolled material
- height
- rolled stock
- amt
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 39
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 9
- 238000005096 rolling process Methods 0.000 abstract description 9
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004088 simulation 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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/04—Lateral deviation, meandering, camber of product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分舒〉 本発明は、圧延機の圧延材の蛇行量検出装置に関する。[Detailed description of the invention] 〈Industrial use distribution〉 The present invention relates to a meandering amount detection device for a rolled material of a rolling mill.
〈従来の技術〉
圧延機において、圧延材の板幅中心がワークロールのセ
ンタからずれて、板材が横流れする現象（蛇行）は、左
右圧下装置のレベリング不良、入側板厚の左右不均一、
板材の左右硬度の不均一等により発生する。この蛇行は
圧延材の歩留向上やワークロールの損傷防止のために防
止しなけらばならないが、この防止のためにはまず板材
の蛇行量を精度良く検出する必要がある。すなわち、シ
ミュレーシ曹ンやモデル実験により、精度良く検出した
板材の蛇行量をフィードバックして左右レベリング、ロ
ールペンディング力を操作する制御が有効であることが
判明している。したがって、蛇行制御のポイントは蛇行
量の高精度検出に依存する。<Prior art> In a rolling mill, the phenomenon in which the center of the width of the rolled material deviates from the center of the work roll and the material flows sideways (meandering) is caused by poor leveling of the left and right rolling devices, non-uniform left and right thickness of the entry side,
This occurs due to uneven hardness of the left and right sides of the board. This meandering must be prevented in order to improve the yield of rolled material and prevent damage to work rolls, but in order to prevent this, it is first necessary to accurately detect the amount of meandering of the plate material. In other words, it has been found through simulations and model experiments that it is effective to control the horizontal leveling and roll pending force by feeding back the accurately detected meandering amount of the plate material. Therefore, the point of meandering control depends on highly accurate detection of the amount of meandering.
第２図は従来実施されてきた熱間圧延における蛇行検出
装置の一例を示す。ここで、１は圧延材、２はワークロ
ール、３は圧延機のワークロール２の軸方向に沿いＣＯ
Ｄ素子を配列したカメラ、４は演算部である。この装置
では、カメラ３をワークロール２のセンタ上方に１個配
置し、圧延材１の板幅全体をカメラ３の矢視２Ｄ内にお
き、このカメラでは３Ｗに示すような出力波形を得てい
る。すなわち、カメラ３内において圧延材１０部分に対
応するＣＯＤ素子には電荷が蓄積され、その他のＣＯＤ
素子には電荷の蓄積はなくＣＣＤカメラ３の出力波形３
Ｗを得る。カメラ３の後段に配置された演算部４では電
荷が蓄積されている部分とされていない部分との境界部
分（出力波形３ａの■、■部分）を板端と判定し、両端
の平均値として板材中央位置を求める。すなわち、演算
部４では中央位置〈発明が解決しようとする問題点〉
ところが、上述の如き検出方法においては、板の上下動
が勘案されず次の問題がある。すなわち、圧延直後での
板の上下動は、はとんど無視できる量であるが、かかる
場所では冷却水や蒸気の影響が大きくて光学カメラによ
る検出が極めて困難であること、光学カメラを設置する
場合には設置場所の制約が厳しく事実上カメラの取付が
不可能であることのため、カメラ設置位置は圧下位置よ
り１ｍｍ以上上た場所とならざるを得ない。FIG. 2 shows an example of a conventional meandering detection device for hot rolling. Here, 1 is a rolled material, 2 is a work roll, and 3 is a CO along the axial direction of the work roll 2 of the rolling mill.
A camera in which D elements are arranged, 4 is a calculation section. In this device, one camera 3 is placed above the center of the work roll 2, and the entire width of the rolled material 1 is placed within the arrow 2D of the camera 3, and this camera obtains an output waveform as shown in 3W. There is. That is, in the camera 3, charges are accumulated in the COD element corresponding to the rolled material 10 portion, and other COD elements are accumulated.
There is no charge accumulation in the element, and the output waveform 3 of the CCD camera 3
Get W. The arithmetic unit 4 placed after the camera 3 determines the boundary between the part where charge is accumulated and the part where no charge is accumulated (■, ■ part of the output waveform 3a) as the plate edge, and calculates the average value of both ends. Find the center position of the board. That is, in the calculation unit 4, the center position (problem to be solved by the invention) is detected.However, in the above-mentioned detection method, the vertical movement of the plate is not taken into account, and there is the following problem. In other words, although the vertical movement of the plate immediately after rolling is almost negligible, in such places the influence of cooling water and steam is large and detection with an optical camera is extremely difficult. In this case, the installation location is severely restricted and it is virtually impossible to install the camera, so the camera installation position must be 1 mm or more above the lowered position.
しかし、このようにカメラ位置を離すと少なからず板の
上下動が発生する。これは圧延材の走行によって発生す
る他、圧延材の張力をコントロールする為に上下動する
ルーバの動きに起因するものがある。このルーバの動き
に起因する場合は４００＋ｍ＋程度にも達する。However, if the camera positions are separated in this way, the board will move up and down to some extent. This is caused not only by the running of the rolled material, but also by the movement of the louver, which moves up and down to control the tension of the rolled material. If it is caused by the movement of the louver, it can reach about 400+m+.
したがって、カメラの視野内での圧延材板端位置情報の
みでは、板の上下動により光学系の像倍率が変化する為
真の蛇行量の検出は困難であり誤差が太き不具合があっ
た。Therefore, with only information on the position of the edge of the rolled material within the field of view of the camera, it is difficult to detect the true amount of meandering because the image magnification of the optical system changes due to the vertical movement of the board, resulting in large errors.
そこで、本発明は、上述の欠点に鑑み、板の上下動を加
味した圧延材の板幅の蛇行量を高精度に検出する圧延材
の蛇行量検出方法の提供を目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a method for detecting the amount of meandering of a rolled material with high accuracy, taking into account the vertical movement of the sheet.
く問題点を解決するための手段〉
上述の目的を達成するための本発明は、圧延材の板端位
置を検知することにより、ワークロールセンタに対する
圧延材の蛇行量を検出する方法において、上記圧延材の
高さ位置を圧延材ルーバの高さから求め、光学カメラ、
圧延材蛇行量測定点及び圧延材ルーバの幾何学的配置関
係から光学カメラ系の倍率を計算し、この倍率と光学カ
メラにより検知される蛇行量により蛇行量の絶対値を求
めることを特徴とする。Means for Solving the Problems> The present invention provides a method for detecting the meandering amount of a rolled material with respect to a work roll center by detecting the plate end position of the rolled material. The height position of the rolled material is determined from the height of the rolled material louver, and an optical camera,
The method is characterized in that the magnification of the optical camera system is calculated from the geometrical arrangement of the rolled material meandering amount measurement points and the rolled material louvers, and the absolute value of the meandering amount is determined from this magnification and the meandering amount detected by the optical camera. .
く作 用〉
光学カメラにより検出される蛇行測定量に上記構成にて
光学系の倍率補正を行なうことにより、求めたい真の蛇
行量を検出する事が可能となる。Function> By correcting the magnification of the optical system with the above configuration to the meandering measurement amount detected by the optical camera, it becomes possible to detect the true meandering amount to be determined.
く実 施 例〉
ここで、本発明の実施例を第１図、第２図を参照して説
明する。第１図は蛇行量計算の説明のための図、第２図
は実施例方法を使用すλ装置である。まず第１図、第２
図において、１は熱間圧延における圧延材、２は上下一
対のワークロール、３は圧延材上部に設置されたＣＣＤ
カメラ、４は演算部、５は上下一対のバックアップロー
ル、６は圧延機間に設Ｈされたルーバロール、７はルー
バロール６の駆動モータである。また、３ＷはＣＣＤカ
メラ３の出力波形を示す。Embodiments Here, embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram for explaining meandering amount calculation, and FIG. 2 is a λ device using the method of the embodiment. First, Figure 1, Figure 2
In the figure, 1 is a rolled material during hot rolling, 2 is a pair of upper and lower work rolls, and 3 is a CCD installed on the top of the rolled material.
A camera, 4 a calculation unit, 5 a pair of upper and lower backup rolls, 6 a louver roll installed between the rolling mills, and 7 a drive motor for the louver roll 6. Further, 3W indicates the output waveform of the CCD camera 3.
ＣＣＤカメラ３の設置位置は、圧延条件が設定され圧延
材が蛇行していない時の板の中心がカメラ視野の中心位
置にくるようになっている。そして、カメラ視野内の圧
延材の板端位置（第２図中長さｊ、ｊ２）は、電荷が蓄
積されているＣＯＤ素子と蓄積されていないＣＯＤ素子
の境界部分（第２図中■、■）により求める。そして、
出力波形３Ｗによりこの場合、Ｉ！１１２はＣＣＤカメ
ラの走査時間から求まる相対的な値であり、カメラの全
視野２Ｄの大きさすなわち光学系の倍率によって絶対値
が変化する。ここで、板の上下位置が変われば、倍率が
変化するためその手当てをしなけらばならない。The CCD camera 3 is installed in such a way that the center of the plate is at the center of the camera field of view when the rolling conditions are set and the rolled material is not meandering. The plate edge position of the rolled material within the field of view of the camera (lengths j and j2 in Figure 2) is located at the boundary between the COD elements where charges are accumulated and the COD elements where no charges are accumulated (■, in Figure 2). ■). and,
In this case, due to the output waveform 3W, I! 112 is a relative value determined from the scanning time of the CCD camera, and its absolute value changes depending on the size of the entire field of view 2D of the camera, that is, the magnification of the optical system. Here, if the vertical position of the board changes, the magnification will change, so you must take care of this.
よって、倍率を求める手順を説明する。第１図にて、Ｈ
，ヲワークロール２とルーバロール６との間の距離、Ｈ
２をワークロール２とＣＣＤカメラ３との間の距離、■
をパスラインレベル３０からＣＣＤカメラ３までの高さ
、ｖ２ヲパスラインレベル３０からルーバローラ６部の
圧延材までの高さ、■をパスラインレベル３０から圧延
材蛇行検出部の圧延材高さとする。圧延材１がパスライ
ンレベル３０にある時の光学系倍率ｍは、ＣＣＤカメラ
３の取付位置及び光学的特性により事前に知る事ができ
る。Therefore, the procedure for calculating the magnification will be explained. In Figure 1, H
, distance between the work roll 2 and the louver roll 6, H
2 is the distance between the work roll 2 and the CCD camera 3, ■
Let be the height from the pass line level 30 to the CCD camera 3, v2 the height from the pass line level 30 to the rolled material of the louver roller 6 section, and ■ be the height of the rolled material from the pass line level 30 to the rolled material meandering detection part. . The optical system magnification m when the rolled material 1 is at the pass line level 30 can be known in advance from the mounting position and optical characteristics of the CCD camera 3.
今圧延中の蛇行検出部の圧延材高さＶでの倍率ｍ１を倍
率ｍを用いて、計算すると次式となる。When the magnification m1 at the height V of the rolled material of the meandering detection part currently being rolled is calculated using the magnification m, the following equation is obtained.
更に、高さｖｘは圧延材１が圧延機とルーバロール６と
により強く引張られており、ルーバロール６とワークロ
ール２との間で直線状になっているため、幾何計算によ
り次式で求まる。Furthermore, since the rolled material 1 is strongly pulled by the rolling mill and the louver roll 6, and is in a straight line between the louver roll 6 and the work roll 2, the height vx can be determined by geometric calculation using the following equation.
この場合、ルーバロール６の上端高さＶは、ルーバロー
ル６の位置を変位計で計測する方法や、ルーバモータ７
の回転角計算方法により容易に測定できる。In this case, the upper end height V of the louver roll 6 can be determined by measuring the position of the louver roll 6 with a displacement meter or by using the louver motor 7.
It can be easily measured using the rotation angle calculation method.
従って、蛇行量の絶対値Ｙｃ−ｙｃＸ ｍ、から求まり
次式を得る。Therefore, the following equation is obtained from the absolute value of the amount of meandering, Yc-ycXm.
この結果、板が上下動を起こしても、その影響は高さｖ
２により補正され、真の蛇行量検出が可能となる。As a result, even if the plate moves up and down, the effect is on the height v
2, it becomes possible to detect the true meandering amount.
〈発明の効果〉
以上説明した様に、本発明によればＣＯＤカメラにより
板端位置を検知する事により圧延材の蛇行量を検知する
方法に於て、圧延材ルーバの高さを検知し、これに基づ
く幾何学的演算によりカメラ系の像倍率が求まり、その
値でもって、検出した蛇行量を補正する事により、板の
上下動に影響されない精度の良い蛇行検出方法を提供す
るものである。<Effects of the Invention> As explained above, according to the present invention, in the method of detecting the meandering amount of a rolled material by detecting the plate end position with a COD camera, the height of the rolled material louver is detected, The image magnification of the camera system is determined by geometric calculations based on this, and the detected meandering amount is corrected using that value, thereby providing a highly accurate meandering detection method that is not affected by the vertical movement of the board. .
第１図は本発明の実施例方法を説明するための説明図、
第２図は圧延材の蛇行量検出装置の構成図である。
図 中、
１は圧延材、
２はワークロール、
３はＣＯＤカメラ、
３Ｗは出力波形、
４は演算量、
６はルーバロール、
３０はパスラインレベル、
Ｈｌ、Ｈ，はワークロールとルーバロール、ＣＯＤカメ
ラとの距離、
ｖ１１ｖ２ｐｖｘはパスラインレベルからＣＯＤカメラ
、ルーバローラ部
上端、蛇行検出部までの高
さである。FIG. 1 is an explanatory diagram for explaining an embodiment method of the present invention,
FIG. 2 is a configuration diagram of a meandering amount detection device for rolled material. In the figure, 1 is the rolled material, 2 is the work roll, 3 is the COD camera, 3W is the output waveform, 4 is the amount of calculation, 6 is the louver roll, 30 is the pass line level, Hl, H, are the work roll, louver roll, and COD camera The distance v11v2pvx is the height from the pass line level to the COD camera, the upper end of the louver roller section, and the meandering detection section.
Claims (1)
センタに対する圧延材の蛇行量を検出する方法において
、上記圧延材の高さ位置を圧延材ルーバの高さから求め
、光学カメラ、圧延材蛇行量測定点及び圧延材ルーバの
幾何学的配置関係から光学カメラ系の倍率を計算し、こ
の倍率と光学カメラにより検知される蛇行量により蛇行
量の絶対値を求めることを特徴とする圧延材の蛇行量検
出方法。In a method for detecting the meandering amount of a rolled material relative to a work roll center by detecting the plate edge position of the rolled material, the height position of the rolled material is determined from the height of the rolled material louver, and an optical camera is used to detect the meandering amount of the rolled material with respect to the work roll center. The magnification of an optical camera system is calculated from the geometrical arrangement of the measurement points and the rolled material louvers, and the absolute value of the amount of meandering is determined from this magnification and the amount of meandering detected by the optical camera. Meandering amount detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001006A JPS63171213A (en) | 1987-01-08 | 1987-01-08 | Method for detecting meandering amount of rolled stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001006A JPS63171213A (en) | 1987-01-08 | 1987-01-08 | Method for detecting meandering amount of rolled stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63171213A true JPS63171213A (en) | 1988-07-15 |
Family
ID=11489493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62001006A Pending JPS63171213A (en) | 1987-01-08 | 1987-01-08 | Method for detecting meandering amount of rolled stock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63171213A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009037064A1 (en) | 2007-09-13 | 2009-03-26 | Siemens Aktiengesellschaft | Method for operating a rolling mill train with curvature recognition |
| JP2010058139A (en) * | 2008-09-02 | 2010-03-18 | Sumitomo Metal Ind Ltd | Method and apparatus for determining contact, method and device for controlling looper, and method and apparatus for manufacturing hot-rolled steel plate |
| EP3715000A1 (en) * | 2019-03-27 | 2020-09-30 | Primetals Technologies Austria GmbH | Prevention of waves in the rolling of metal strips |
-
1987
- 1987-01-08 JP JP62001006A patent/JPS63171213A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009037064A1 (en) | 2007-09-13 | 2009-03-26 | Siemens Aktiengesellschaft | Method for operating a rolling mill train with curvature recognition |
| US8752409B2 (en) | 2007-09-13 | 2014-06-17 | Siemens Aktiengesellschaft | Method for a operating a rolling mill train with curvature recognition |
| JP2010058139A (en) * | 2008-09-02 | 2010-03-18 | Sumitomo Metal Ind Ltd | Method and apparatus for determining contact, method and device for controlling looper, and method and apparatus for manufacturing hot-rolled steel plate |
| EP3715000A1 (en) * | 2019-03-27 | 2020-09-30 | Primetals Technologies Austria GmbH | Prevention of waves in the rolling of metal strips |
| WO2020193099A1 (en) * | 2019-03-27 | 2020-10-01 | Primetals Technologies Austria GmbH | Preventing undulations when rolling metal strips |
| CN113646102A (en) * | 2019-03-27 | 2021-11-12 | 普锐特冶金技术奥地利有限公司 | Avoiding curling during rolling of metal strips |
| CN113646102B (en) * | 2019-03-27 | 2023-08-11 | 普锐特冶金技术奥地利有限公司 | Avoiding curling during rolling of metal strips |
| US11858021B2 (en) | 2019-03-27 | 2024-01-02 | Primetals Technologies Austria GmbH | Preventing undulations when rolling metal strips |
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