JPH0557323A - Method for controlling steel plate edge heating device - Google Patents
Method for controlling steel plate edge heating deviceInfo
- Publication number
- JPH0557323A JPH0557323A JP3240276A JP24027691A JPH0557323A JP H0557323 A JPH0557323 A JP H0557323A JP 3240276 A JP3240276 A JP 3240276A JP 24027691 A JP24027691 A JP 24027691A JP H0557323 A JPH0557323 A JP H0557323A
- Authority
- JP
- Japan
- Prior art keywords
- heating device
- warp
- amount
- steel plate
- edge heating
- 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
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、圧延材の幅方向温度不
均一を解消するために、また圧延材の均一な仕上げ温度
を確保するために使用する熱間圧延工程における鋼板エ
ッジ加熱装置の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate edge heating apparatus in a hot rolling process used for eliminating uneven temperature in the width direction of a rolled material and for ensuring a uniform finishing temperature of the rolled material. Control method
【0002】[0002]
【従来の技術】従来より鋼板エッジ加熱装置の中で最も
使用されている形式のものは、図2に示す誘導加熱タイ
プの加熱装置で、上下のインダクター2、3間に発生す
る磁束の中を圧延材1が通過する際に、圧延材1表面に
発生する渦電流によるジュール熱を利用したものであ
る。これはその構造上、上下インダクター間のギャップ
を小さくすればするほど入熱量も大きく同時に効率的で
ある事から、ギャップ量をできるだけ小さく設定する事
が要求されている。2. Description of the Related Art Conventionally, the most widely used type of steel sheet edge heating device is an induction heating type heating device shown in FIG. 2, in which the magnetic flux generated between the upper and lower inductors 2 and 3 is It utilizes Joule heat due to eddy currents generated on the surface of the rolled material 1 when the rolled material 1 passes through. Due to its structure, the smaller the gap between the upper and lower inductors, the larger the heat input amount and the more efficient it is. Therefore, it is required to set the gap amount as small as possible.
【0003】[0003]
【発明が解決しようとする課題】ところが、熱間工程に
おける鋼板の先・後端には上反りまたは下反りと呼ばれ
る反り部が存在しており、鋼板エッジ加熱装置において
はこの反り部が設備破損を起こす危険がある。そのた
め、鋼板の先・後端の上下インダクター間ギャップを大
きく設定し、鋼板の先・後端の反り部を通過させたのち
ギャップを最小量に再設定して、危険を回避する必要が
あった。このように、従来は発生が予想される反り量の
最大値を上下インダクター間ギャップ設定量としてお
り、設備破損の危険回避を主体とした制御方法となって
いた。However, there is a warp portion called a warp or a warp at the front and rear ends of the steel sheet in the hot process, and in the steel sheet edge heating device, this warp portion causes equipment damage. There is a risk of causing Therefore, it is necessary to set a large gap between the upper and lower inductors at the leading and trailing edges of the steel sheet, pass the warped portion at the leading and trailing edges of the steel sheet, and then reset the gap to the minimum amount to avoid danger. .. As described above, conventionally, the maximum value of the amount of warpage that is expected to occur is set as the gap setting amount between the upper and lower inductors, and the control method is mainly for avoiding the risk of equipment damage.
【0004】しかしながら、かかる従来の制御方法では
設備破損は回避できるものの、効率面からは大きなロス
があり、省エネルギーの観点からも充分な対策とは言え
ない。However, although such conventional control methods can avoid equipment damage, there is a large loss in terms of efficiency and it cannot be said to be a sufficient measure from the viewpoint of energy saving.
【0005】[0005]
【課題を解決するための手段】本発明の要旨は、熱間圧
延ラインにおいて、鋼板エッジ加熱装置の上流側に配置
した反り検出器からの検出値に基づいて鋼板エッジ加熱
装置の上下ギャップ位置制御を行うことを特徴とする鋼
板エッジ加熱装置の制御方法である。The gist of the present invention is to control the vertical gap position of a steel sheet edge heating device on the basis of a detected value from a warp detector arranged upstream of the steel plate edge heating device in a hot rolling line. Is a method for controlling a steel sheet edge heating device.
【0006】[0006]
【作用】以下に、本発明を添付の図面を用いて詳しく説
明する。The present invention will be described in detail below with reference to the accompanying drawings.
【0007】図1に制御構成を示す。テーブルローラー
4によって搬送されてくる圧延材1の先後端の反り量
を、反り検出器7から検出器用制御装置11を介して変
換した検出値と上位プロセスコンピューター8から伝送
してくる圧延材1に関する情報とから算出し、鋼板エッ
ジ加熱装置9の上下インダクター2、3間のギャップ量
を演算装置10で演算し、エッジ加熱装置用制御装置1
2を介してギャップの設定位置を制御する。FIG. 1 shows the control configuration. Regarding the rolled material 1 transmitted from the warp detector 7 via the controller 11 for the detector, the warp amount of the front and rear ends of the rolled material 1 conveyed by the table roller 4 and the upper process computer 8 are transmitted. From the information, the gap amount between the upper and lower inductors 2 and 3 of the steel plate edge heating device 9 is calculated by the calculation device 10, and the edge heating device control device 1 is calculated.
The setting position of the gap is controlled via 2.
【0008】図3には反り量を求めるための各位置関係
を、図4にはイメージセンサータイプの検出器の検出イ
メージを示す。X方向にはn分割、Y方向にはm分割さ
れた画素を有する事を示す。高さ方向(Y方向)には基
準点としてローポジション(Yb)、およびハイポジシ
ョン(Ya)を設定する。FIG. 3 shows each positional relationship for obtaining the warp amount, and FIG. 4 shows a detection image of an image sensor type detector. It is shown that the pixel has n divisions in the X direction and m divisions in the Y direction. A low position (Yb) and a high position (Ya) are set as reference points in the height direction (Y direction).
【0009】反り検出器固定後に、ラインセンターから
±Dなる位置でローポジションおよびハイポジションの
高さ実測値を求めておく。以上の測定から求めた値をそ
れぞれ数1のように置く。After the warp detector is fixed, the measured height values of the low position and the high position are obtained at a position ± D from the line center. The values obtained from the above measurements are set as in Equation 1.
【0010】[0010]
【数1】X : 反り検出器先端からラインセンター
までの距離 Xn=X−D : 反り検出器から反り検出器に近い側
の基準点2までの距離 Xf=X+D : 反り検出器から反り検出器に遠い側
の基準点1までの距離 Ln : XnでのローポジションYbの高さ実測値 Hn : XnでのハイポジションYaの高さ実測値 Lf : XfでのローポジションYbの高さ実測値 Hf : XfでのハイポジションYaの高さ実測値[Formula 1] X: Distance from warp detector tip to line center Xn = X-D: Distance from warp detector to reference point 2 on the side closer to the warp detector Xf = X + D: Warp detector to warp detector To the reference point 1 on the side farther away from the side Ln: Actual measurement value of height of low position Yb at Xn Hn: Actual measurement value of height of high position Ya at Xn Lf: Actual measurement value of height of low position Yb at Xf Hf : Actual measured height of high position Ya at Xf
【0011】幅Wの鋼板で上反り計測をした場合、計測
されるのはX−W/2の反り検出器に近い端であるか、
またはX+W/2の反り検出器より遠い端のどちらかで
ある。When a warp measurement is performed on a steel plate having a width W, is it measured at an end close to the X-W / 2 warp detector?
Or, it is either the end farther than the warp detector of X + W / 2.
【0012】また、X−W/2、X+W/2地点でのロ
ーポジションYbおよびハイポジションYaの高さL
n′、Hn′、Lf′、Hf′は、計算式数2で表され
る。The height L of the low position Yb and the high position Ya at the points X-W / 2 and X + W / 2.
n ′, Hn ′, Lf ′, and Hf ′ are represented by the calculation formula number 2.
【0013】[0013]
【数2】 Ln′=Ln+(Lf−Ln)×(D−W/2)÷(2×D) Hn′=Hn+(Hf−Hn)×(D−W/2)÷(2×D) Lf′=Ln+(Lf−Ln)×(D+W/2)÷(2×D) Hf′=Hn+(Hf−Hn)×(D+W/2)÷(2×D)Ln ′ = Ln + (Lf−Ln) × (D−W / 2) ÷ (2 × D) Hn ′ = Hn + (Hf−Hn) × (D−W / 2) ÷ (2 × D) Lf ′ = Ln + (Lf−Ln) × (D + W / 2) ÷ (2 × D) Hf ′ = Hn + (Hf−Hn) × (D + W / 2) ÷ (2 × D)
【0014】ここで、鋼板の上端高さ(上反り位置)を
Yとし、その時の計測座標位置をPとする。Here, the upper end height (upward warp position) of the steel plate is Y, and the measurement coordinate position at that time is P.
【0015】反り検出器に近い側の反り量を検出した場
合は、数3となる。When the amount of warp on the side closer to the warp detector is detected, the equation 3 is obtained.
【0016】[0016]
【数3】 Y=Hn′−(Hn′−Ln′)×(P−Ya)÷Yb ……… ## EQU00003 ## Y = Hn '-(Hn'-Ln'). Times. (P-Ya) / Yb ...
【0017】反り検出器に遠い側の反り量を検出した場
合は、数4となる。When the warp detector detects the warp amount on the far side, the following equation 4 is obtained.
【0018】[0018]
【数4】 Y=Hf′−(Hf′−Lf′)×(P−Ya)÷Yb ……… ## EQU00004 ## Y = Hf '-(Hf'-Lf'). Times. (P-Ya) / Yb ...
【0019】材料の高さがある値(PP、YY)よりも
大きいときは反り検出器に近い方が検出され、小さいと
きは反り検出器より遠い方が検出される。ある値(P
P、YY)は式、から数5となる。When the material height is larger than a certain value (PP, YY), the one closer to the warp detector is detected, and when the material height is smaller than the warp detector, the one farther than the warp detector is detected. A certain value (P
P, YY) is given by the equation,
【0020】[0020]
【数5】 PP=(Hf′−Hn′)÷((Hf′−Lf′)−(Hn′−Ln′)) ×Yb+Ya YY=(Hn′×(Hf′−Lf′)−Hf′×(Hn′−Ln′)) ÷((Hf′−Lf′)−(Hn′−Ln′))## EQU5 ## PP = (Hf'-Hn ') / ((Hf'-Lf')-(Hn'-Ln ')) * Yb + Ya YY = (Hn' * (Hf'-Lf ')-Hf' * (Hn'-Ln ')) / ((Hf'-Lf')-(Hn'-Ln '))
【0021】従って、PがPPよりも小さいとき(材料
高さがYYより高いとき)は式を使用し、PがPPよ
りも大きいとき(材料高さがYYより低いとき)は式
を使用する事で上反り量を演算することができる。下反
り量についても、同様の方法で算出することができる。Therefore, the formula is used when P is smaller than PP (when the material height is higher than YY), and when P is larger than PP (when the material height is lower than YY). It is possible to calculate the amount of warpage. The amount of warp can also be calculated by the same method.
【0022】[0022]
【実施例】次に、実施例を挙げて本発明による制御につ
いて具体的に説明する。EXAMPLES Next, the control according to the present invention will be specifically described with reference to examples.
【0023】今までの知見としてラインに起こり得る反
り量の分布を示したのが図5で、最大で30mm以上あ
ることが分かる。一方、図6には本法により検出した材
料の先端から後端までの反り量の推移を示す。従来の方
法を採用すれば、インダクター間ギャップは全てこの3
0mmに設定せざるを得ず、大幅な効率悪化は避けられ
ない。ところが、本発明により板毎の反り量に合わせた
ギャップ設定をする事で、常に最適な効率を維持するこ
とができた。FIG. 5 shows the distribution of the amount of warp that can occur in the line as the knowledge so far. It can be seen that the maximum is 30 mm or more. On the other hand, FIG. 6 shows changes in the amount of warpage from the front end to the rear end of the material detected by this method. If the conventional method is adopted, the gap between inductors is
There is no choice but to set it to 0 mm, and it is inevitable that efficiency will drop significantly. However, by setting the gap according to the amount of warpage for each plate according to the present invention, it was possible to always maintain optimum efficiency.
【0024】[0024]
【発明の効果】以上のように、本発明によれば常に効率
を最適に保つことができるため、使用エネルギー量を無
駄にすることなく、必要最小限度に抑えることができ
る。また、異常な反りが発生した場合にも、鋼板エッジ
加熱装置を緊急に退避させることができるなどの効果が
得られる。As described above, according to the present invention, since the efficiency can be always kept optimum, the amount of energy used can be suppressed to the minimum necessary amount without being wasted. Further, even when an abnormal warp occurs, it is possible to obtain the effect that the steel sheet edge heating device can be evacuated urgently.
【図1】本発明を実施するための制御機器の構成図であ
る。FIG. 1 is a configuration diagram of a control device for carrying out the present invention.
【図2】鋼板エッジ加熱装置の側面図である。FIG. 2 is a side view of a steel plate edge heating device.
【図3】反り量を求めるための各位置関係を示す図であ
る。FIG. 3 is a diagram showing each positional relationship for obtaining a warp amount.
【図4】反り検出器の検出イメージ画面を示す図であ
る。FIG. 4 is a diagram showing a detection image screen of the warp detector.
【図5】実ラインでの反り量分布を示す図である。FIG. 5 is a diagram showing a warp amount distribution on a real line.
【図6】反り検出器を用いて検出した反り量の圧延材先
端から後端までの推移を示す図である。FIG. 6 is a diagram showing a transition of a warp amount detected by using a warp detector from the front end to the rear end of a rolled material.
1 圧延材 2 上インダクター 3 下インダクター 4 テーブルローラー 5 上インダクターギャップ調整装置 6 下インダクターギャップ調整装置 7 反り検出器 8 上位プロセスコンピューター 9 鋼板エッジ加熱装置 10 演算装置 11 検出器用制御装置 12 エッジ加熱装置用制御装置 1 rolled material 2 upper inductor 3 lower inductor 4 table roller 5 upper inductor gap adjusting device 6 lower inductor gap adjusting device 7 warp detector 8 upper process computer 9 steel plate edge heating device 10 arithmetic unit 11 controller for detector 12 edge heating Device control device
Claims (1)
熱装置の上流側に配置した反り検出器からの検出値に基
づいて鋼板エッジ加熱装置の上下ギャップ位置制御を行
うことを特徴とする鋼板エッジ加熱装置の制御方法。1. In a hot rolling line, the vertical gap position control of the steel plate edge heating device is performed based on a detection value from a warp detector arranged upstream of the steel plate edge heating device. Device control method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3240276A JPH0557323A (en) | 1991-08-28 | 1991-08-28 | Method for controlling steel plate edge heating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3240276A JPH0557323A (en) | 1991-08-28 | 1991-08-28 | Method for controlling steel plate edge heating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0557323A true JPH0557323A (en) | 1993-03-09 |
Family
ID=17057085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3240276A Pending JPH0557323A (en) | 1991-08-28 | 1991-08-28 | Method for controlling steel plate edge heating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0557323A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5927118A (en) * | 1996-05-28 | 1999-07-27 | Nkk Corporation | Method for making hot-rolled steel sheet and apparatus therefor |
CN111940517A (en) * | 2019-05-14 | 2020-11-17 | 东芝三菱电机产业系统株式会社 | Control system for edge heater |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58157329A (en) * | 1981-10-23 | 1983-09-19 | 株式会社東芝 | Oil-immersed electric device with pressure sensitive relay |
JPH0289513A (en) * | 1988-09-26 | 1990-03-29 | Nkk Corp | Method for rolling metallic plate |
-
1991
- 1991-08-28 JP JP3240276A patent/JPH0557323A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58157329A (en) * | 1981-10-23 | 1983-09-19 | 株式会社東芝 | Oil-immersed electric device with pressure sensitive relay |
JPH0289513A (en) * | 1988-09-26 | 1990-03-29 | Nkk Corp | Method for rolling metallic plate |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5927118A (en) * | 1996-05-28 | 1999-07-27 | Nkk Corporation | Method for making hot-rolled steel sheet and apparatus therefor |
CN111940517A (en) * | 2019-05-14 | 2020-11-17 | 东芝三菱电机产业系统株式会社 | Control system for edge heater |
CN111940517B (en) * | 2019-05-14 | 2022-07-08 | 东芝三菱电机产业系统株式会社 | Control system for edge heater |
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