JPS63317208A - Control device for cooling hot rolled steel strip - Google Patents
Control device for cooling hot rolled steel stripInfo
- Publication number
- JPS63317208A JPS63317208A JP62152722A JP15272287A JPS63317208A JP S63317208 A JPS63317208 A JP S63317208A JP 62152722 A JP62152722 A JP 62152722A JP 15272287 A JP15272287 A JP 15272287A JP S63317208 A JPS63317208 A JP S63317208A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- steel strip
- temperature
- hot
- estimated
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 17
- 230000000704 physical effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005096 rolling process Methods 0.000 abstract description 8
- 239000007921 spray Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は熱間圧延における熱間鋼帯の冷却制御装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling control device for hot steel strip during hot rolling.
熱間圧延において種々の性質を持った広い範囲の材質を
得るには、熱間圧延における冷却工程の冷却パターンを
種々変更できることが必要である。In order to obtain a wide range of materials with various properties in hot rolling, it is necessary to be able to vary the cooling pattern of the cooling step in hot rolling.
このような冷却制御装置として例えば特開昭５９−２２
９２１８号公報がある。これは冷却過程の基準パターン
を設定しておき、仕上げ圧延機における銅帯の温度及び
厚みを一定の時間又は距離間隔毎にサンプリングしてこ
のサンプリング点を追跡し、以後このサンプリング点の
温度を注水実績により計算して求め、この温度に基づい
て注水パターンを修正する技術である。As such a cooling control device, for example, Japanese Patent Application Laid-Open No. 59-22
There is a publication No. 9218. This is done by setting a reference pattern for the cooling process, sampling the temperature and thickness of the copper strip in the finishing rolling mill at regular intervals of time or distance, tracking this sampling point, and subsequently injecting water into the temperature at this sampling point. This is a technology that calculates the temperature based on actual results and corrects the water injection pattern based on this temperature.
ところで、一般に冷却工程において圧延鋼帯の正確な表
面温度の測定は、圧延鋼帯表面の冷却水（蒸溜水）や水
蒸気等の為に大変困難となっている。このことは上記技
術も同様であって圧延鋼帯の表面温度は測定しているも
のの正確に測定することは困難となっており、ましてこ
の表面温度は冷却工程の外部位置となっている。又、冷
却中の圧延鋼帯にはその厚み方向に対して温度分布がで
き、例えば板厚１８．０＋ｅ＋＊の圧延鋼帯に対して冷
却速度７℃／Ｓで１８ｓ間冷却すると、表面位置と中心
位置との温度差は５０℃近くになる。従って、たとえ圧
延鋼帯の表面温度を正確に測定できたとしても熱間鋼帯
の正確な温度は測定できず、表面温度を目標温度に制御
するだけでは圧延鋼帯の冷却を精度高くできずに所望の
性質を持った材質の圧延体を得ることはできない。By the way, it is generally very difficult to accurately measure the surface temperature of a rolled steel strip during the cooling process because of cooling water (distilled water), water vapor, etc. on the surface of the rolled steel strip. This is the same with the above-mentioned technology, and although the surface temperature of the rolled steel strip is measured, it is difficult to accurately measure it, and moreover, this surface temperature is located outside the cooling process. In addition, a temperature distribution occurs in the thickness direction of a rolled steel strip during cooling. For example, when a rolled steel strip with a thickness of 18.0+e+* is cooled for 18 seconds at a cooling rate of 7°C/S, the surface position and The temperature difference from the center position is nearly 50°C. Therefore, even if the surface temperature of the rolled steel strip can be measured accurately, the accurate temperature of the hot steel strip cannot be measured, and simply controlling the surface temperature to the target temperature cannot accurately cool the rolled steel strip. However, it is not possible to obtain a rolled body made of a material with desired properties.
そこで本発明は、冷却工程内で熱間鋼帯の表面〔問題点
を解決するための手段〕
本発明は、熱間鋼帯の冷却工程における冷却量を制御す
る熱間鋼帯の冷却制御装置において、冷却工程における
冷却水等の影響を受けない熱間鋼帯の一方面側に配置さ
れてこの熱間鋼帯の表面温度を測定する表面温度計と、
熱間鋼帯の熱伝導に関する物性値から熱間鋼帯の厚み方
向に対する温度分布を推定する温度分布推定手段と、こ
の温度推定手段により推定された推定温度分布と表面温
度計で測定された実績表面温度とから熱間鋼帯の平均温
度を推定する平均温度推定手段と、この平均温度推定手
段により推定された平均温度と目標温度とから冷却工程
における熱間鋼帯に対する冷却量を求める冷却量調整手
段とを備えて上記目的を達成しようとする熱間鋼帯の冷
却制御装置である。Therefore, the present invention provides a cooling control device for a hot steel strip that controls the amount of cooling in the cooling process of the hot steel strip. a surface thermometer that is placed on one side of the hot steel strip and measures the surface temperature of the hot steel strip, which is not affected by cooling water or the like in the cooling process;
A temperature distribution estimating means for estimating the temperature distribution in the thickness direction of a hot-worked steel strip from physical property values related to heat conduction of the hot-worked steel strip, and the estimated temperature distribution estimated by this temperature estimation means and results measured with a surface thermometer. An average temperature estimation means for estimating the average temperature of the hot steel strip from the surface temperature, and a cooling amount for calculating the cooling amount for the hot steel strip in the cooling process from the average temperature estimated by the average temperature estimation means and the target temperature. This is a cooling control device for a hot steel strip, which is equipped with an adjusting means to achieve the above object.
このような手段を備えたことにより、熱間鋼帯の熱伝導
に関する物性値から熱間鋼帯の厚み方向に対する温度分
布が温度分布推定手段により推定され、この推定された
推定温度分布と表面温度計で測定された実績表面温度と
から熱間鋼帯の平均温度が平均温度推定手段で推定され
る。そして、この平均温度推定手段により推定された平
均温度と目標温度とから冷却工程における熱間鋼帯に対
する冷却量が冷却量調整手段により求められる。By having such a means, the temperature distribution in the thickness direction of the hot-worked steel strip is estimated from the physical property values regarding heat conduction of the hot-worked steel strip, and the estimated temperature distribution and the surface temperature are estimated by the temperature distribution estimation means. The average temperature of the hot steel strip is estimated by the average temperature estimation means from the actual surface temperature measured by the meter. Then, the cooling amount for the hot steel strip in the cooling process is determined by the cooling amount adjusting means from the average temperature estimated by the average temperature estimating means and the target temperature.
以下、本発明の一実施例について図面を参照して説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第１図は熱間鋼帯の冷却制御装置の構成図である。同図
において１は仕上げ圧延機であり、この仕上げ圧延機１
の下流に冷却工程として機能する冷却バンク２−１〜２
− ｎが複数配列されている。FIG. 1 is a configuration diagram of a cooling control device for a hot steel strip. In the figure, 1 is a finishing rolling mill, and this finishing rolling mill 1
Cooling banks 2-1 to 2-2 that function as a cooling process downstream of
- A plurality of n is arranged.
これら冷却バンク２−１〜２− ｎは第２図に示すよう
に注水用スプレ３−１〜３−５．４−１〜４−４をライ
ンの流れ方向に沿って配置した構成となっている。なお
、５−１〜５−５はローラである。These cooling banks 2-1 to 2-n have a configuration in which water injection sprays 3-1 to 3-5.4-1 to 4-4 are arranged along the flow direction of the line, as shown in Fig. 2. There is. Note that 5-1 to 5-5 are rollers.
さて、冷却バンク２−１と２−２．２−２と２−３．２
−４と２−５との各間には熱間鋼帯２０の表面温度を測
定する表面温度計２１．２２゜２３が配置されており、
その具体的配置位置は冷却水や水蒸気の影響を受けない
熱間鋼帯２０の下面側となっている。又、仕上げ圧延機
１と冷却バンク２−１との間に熱間鋼帯２０の上面側表
面温度を測定する表面温度計２４が配置されるとともに
冷却バンク２− ｎとロール２５との間に冷却工程を通
過した熱間鋼帯２０の上面側表面温度を測定する表面温
度計２６及び下面側の表面温度を測定する表面温度計２
７が配置されている。Now, cooling banks 2-1 and 2-2.2-2 and 2-3.2
A surface thermometer 21.22°23 for measuring the surface temperature of the hot steel strip 20 is arranged between each of -4 and 2-5,
Its specific location is on the lower surface side of the hot steel strip 20, which is not affected by cooling water or steam. Further, a surface thermometer 24 for measuring the upper surface temperature of the hot steel strip 20 is arranged between the finishing rolling mill 1 and the cooling bank 2-1, and a surface thermometer 24 is arranged between the cooling bank 2-n and the roll 25. A surface thermometer 26 that measures the upper surface temperature of the hot steel strip 20 that has passed the cooling process, and a surface thermometer 2 that measures the lower surface temperature.
7 is placed.
３０は制御装置であって、これは各表面温度計２１．２
２．２３により測定された表面温度（以下、実績表面温
度と指称する）を受けて各冷却バンク２−１〜２− ｎ
における冷却量の制御を行う機能を持ったものである。30 is a control device, which controls each surface thermometer 21.2.
In response to the surface temperature measured in accordance with 2.23 (hereinafter referred to as actual surface temperature), each cooling bank 2-1 to 2-n
It has the function of controlling the amount of cooling in the system.
具体的には温度分布推定手段３１、平均温度推定手段３
２及び冷却量調整手段３３を有している。温度分布推定
手段３１は熱間鋼帯２０の熱伝導に関する物性値から熱
間鋼帯２０の厚み方向に対する温度分布を推定する機能
を有するものであり、平均温度推定手段３２は温度推定
手段３１により推定された推定温度分布と表面温度計２
１．２２．２３で測定された実績表面温度とから熱間鋼
帯２０の平均温度を推定する機能を有するものであり、
又冷却量調整手段３３は平均温度推定手段３２により推
定された平均温度と予め設定された目標温度とがら各冷
却バンク２−１〜２− ｎにおける熱間鋼帯２ｏに対す
る冷却量を求める機能を持ったものである。Specifically, temperature distribution estimation means 31, average temperature estimation means 3
2 and a cooling amount adjusting means 33. The temperature distribution estimating means 31 has a function of estimating the temperature distribution in the thickness direction of the hot steel strip 20 from the physical property values related to heat conduction of the hot steel strip 20, and the average temperature estimating means 32 has a function of estimating the temperature distribution in the thickness direction of the hot steel strip 20 from the physical property values related to heat conduction of the hot steel strip 20. Estimated temperature distribution and surface thermometer 2
It has a function of estimating the average temperature of the hot steel strip 20 from the actual surface temperature measured in 1.22.23,
Further, the cooling amount adjusting means 33 has a function of determining the cooling amount for the hot steel strip 2o in each of the cooling banks 2-1 to 2-n based on the average temperature estimated by the average temperature estimating means 32 and the preset target temperature. It is something that
次に上記の如く構成された装置の作用について説明する
。Next, the operation of the apparatus configured as described above will be explained.
熱間鋼帯２０が仕上げ圧延機１で圧延されて冷却バンク
２−１〜２− ｎへ送られると、各冷却バンク２−１〜
２− ｎではそれぞれ注水用スプレ３−１〜３−５．４
−１〜４−４から冷却水が噴出される。これにより、熱
間鋼帯２ｏは冷却される。When the hot steel strip 20 is rolled by the finish rolling mill 1 and sent to the cooling banks 2-1 to 2-n, each of the cooling banks 2-1 to 2-n
For 2-n, water injection spray 3-1 to 3-5.4 respectively.
Cooling water is spouted from -1 to 4-4. Thereby, the hot steel strip 2o is cooled.
ところで、この冷却中において冷却バンク２−１と２−
２．２−２と２−３．２−４と２−５との間に配置され
た各表面温度計２１゜２２．２３は熱間鋼帯２ｏの下面
側から表面温度を測定し、それぞれその実績表面温度を
制御装置３０に送出する。第３図は熱間鋼帯２ｏの仕上
げ圧延機１を通過した後の仕上げ温度、上面温度（表面
温度）及び下面（裏面）温度を示したもので、裏面温度
は表面温度よりも少し高い値を示している。By the way, during this cooling, cooling banks 2-1 and 2-
2.2-2 and 2-3. Each surface thermometer 21°22.23 placed between 2-4 and 2-5 measures the surface temperature from the bottom side of the hot steel strip 2o. The actual surface temperature is sent to the control device 30. Figure 3 shows the finishing temperature, upper surface temperature (surface temperature), and lower surface (back surface) temperature of the hot steel strip 2o after passing through the finishing rolling mill 1.The back surface temperature is a value slightly higher than the surface temperature. It shows.
一方、制御装置３０の温度分布推定手段３１では冷却中
の熱間鋼帯２ｏの厚み方向の温度分布を推定する。ここ
で、この推定方法について説明する。先ず、冷却工程を
上流がら各冷却バンク２−１〜２−ｎごとに分割し、こ
れら冷却バンク２−１〜２− ｎ内の境界条件を一定と
見なして各冷却バンク２−１〜２− ｎごとの厚み方向
の温度分布を次の１次元熱伝導方程式つまり
Ｔ＝Ｔ （ｘ、ｔ）
を演算することにより求める。ここで、Ｔは熱間鋼帯２
０の表面から厚み方向に向ってＸの距離の点の時刻ｔに
おける温度であり、λは熱伝導率（ｋｃａｌ／ ｓｈ”
ｃ ） 、Ｃは比熱（ｋｃａｌ／ｋｇ”ｃ） 、Ｉ）は
密度（ｋｇ／ｍ３）である。On the other hand, the temperature distribution estimating means 31 of the control device 30 estimates the temperature distribution in the thickness direction of the hot steel strip 2o during cooling. Here, this estimation method will be explained. First, the cooling process is divided into each of the cooling banks 2-1 to 2-n from the upstream side, and the boundary conditions within these cooling banks 2-1 to 2-n are assumed to be constant. The temperature distribution in the thickness direction for each n is determined by calculating the following one-dimensional heat conduction equation, that is, T=T (x, t). Here, T is hot steel strip 2
0 is the temperature at time t of a point at a distance of X in the thickness direction, and λ is the thermal conductivity (kcal/sh”
c), C is specific heat (kcal/kg''c), and I) is density (kg/m3).
又、境界条件を
として表わす。ここで、ｑは熱間鋼帯２０の表面におけ
る熱流束であり、ｘ−０は熱間鋼帯２０の上面位置を示
し、ｘ−ｈは下面位置を示している。Also, the boundary condition is expressed as. Here, q is the heat flux on the surface of the hot steel strip 20, x-0 indicates the upper surface position of the hot steel strip 20, and x-h indicates the lower surface position.
次に上記第（１）式及び第（２）式を第４図に示す如く
厚み方向に複数Ｔ（１−Ｔｎに分割し、差分法によって
温度分布を求める。この際、各冷却バンク２−１〜２−
ｎにおける境界条件（実績）は第（２）式により表わ
し、熱流束ｑは各冷却バンク２−１〜２− ｎごとに
ｑｉ −ｕｉ （ＴＩ −Ｔｖ ） ・ｕｉ（ｋｃａ
ｌ／ ｒｄ ｈ ）
・・・（３）
により求める。ここで、α１は各冷却バンク２−１〜２
− ｎごとの熱伝達率（ｋｃａｌ／ｍｈ”ｃ）、Ｔ１は
各冷却バンク２−１〜２− ｎごとの表面温度（”Ｃ）
、Ｔｖは冷却水の水温（’Ｃ） 、ｕＩは各冷却バン
ク２−１〜２− ｎごとの冷却水の制御量である。又、
熱伝達率α１は
ａｌ −ａｌ （ＴＩ 、Ｗ、Ｔｗ ）
−（４）により表わす。Ｗは水量密度（）／ｍ
１ｎ７Ｉｌ）である。なお、物性値（比熱、熱伝導率）
は温度に依存するために温度の関数として表わす。Next, the above equations (1) and (2) are divided into a plurality of T (1-Tn) in the thickness direction as shown in FIG. 4, and the temperature distribution is determined by the difference method. 1-2-
The boundary condition (actual) at
l/rd h ) ...(3). Here, α1 is each cooling bank 2-1 to 2-2.
- Heat transfer coefficient for each n (kcal/mh"c), T1 is the surface temperature ("C) for each cooling bank 2-1 to 2-n
, Tv is the water temperature ('C) of the cooling water, and uI is the control amount of the cooling water for each cooling bank 2-1 to 2-n. or,
The heat transfer coefficient α1 is al −al (TI, W, Tw)
−(4). W is water density ()/m
1n7Il). In addition, physical property values (specific heat, thermal conductivity)
Since it depends on temperature, it is expressed as a function of temperature.
以上により各冷却バンク２−１〜２− ｎごとにそれぞ
れ熱間鋼帯２０の厚み方向の温度分布が推定される。第
５図は以上の推定により求められた熱間鋼帯２０の推定
表面温度（実線）と推定中心温度（破線）とを示してい
る。従って、温度分布推定手段３１は熱間鋼帯２０の流
れを追従して冷却実績を使用して逐次温度推定を行うこ
とにより、各冷却バンク２−１〜２− ｎごとの温度分
布を推定する。As described above, the temperature distribution in the thickness direction of the hot steel strip 20 is estimated for each of the cooling banks 2-1 to 2-n. FIG. 5 shows the estimated surface temperature (solid line) and estimated center temperature (broken line) of the hot steel strip 20 determined by the above estimation. Therefore, the temperature distribution estimating means 31 estimates the temperature distribution for each of the cooling banks 2-1 to 2-n by following the flow of the hot steel strip 20 and sequentially estimating the temperature using the cooling results. .
一方、平均温度推定手段３２は測定ポイントつまり各表
面温度計２１．２２．２３の配置位置に対応した冷却バ
ンク２−１．２−２．２−４における各推定表面温度を
温度分布推定手段３１から受けるとともに各表面温度計
２１．２２．２３から実績表面温度を受けて熱間鋼帯２
０の平均温度を推定する。つまり、推定平均温度をＴ
ｌ ａＶｅ ｓ実績表面温度をＴ ａｃｔとして
Ｔｉａｖｅ＝（Σ ７１ （１） ） ／ ｎ＋（Ｔｉ
ａｃｔ−Ｔｉ”’） ・・・（５）を演算することに
よって求める。On the other hand, the average temperature estimating means 32 calculates each estimated surface temperature in the cooling bank 2-1.2-2.2-4 corresponding to the measurement point, that is, the arrangement position of each surface thermometer 21, 22, 23, to the temperature distribution estimating means 32. The hot steel strip 2 receives the actual surface temperature from each surface thermometer 21, 22, and 23.
Estimate the average temperature of 0. In other words, the estimated average temperature is T
Tiave = (Σ 71 (1) ) / n + (Ti
act-Ti"') ... is obtained by calculating (5).
かくして、冷却量調整手段３３は平均温度推定手段３２
により推定された各冷却バンク２−１〜２− ｎごとの
平均温度Ｔｌａｖｅを受け、これら平均温度Ｔ１ａｖｅ
が予め設定された目標温度Ｔｌｒｅｆ’と一致するよう
な各冷却バンク２−１〜２− ｎごとの冷却水量を次式
により演算して求める。Thus, the cooling amount adjusting means 33 is equal to the average temperature estimating means 32.
After receiving the average temperature Tlave of each cooling bank 2-1 to 2-n estimated by
The amount of cooling water for each of the cooling banks 2-1 to 2-n such that Tlref' matches the preset target temperature Tlref' is calculated by the following equation.
Δｕｌ ＝にｉ （Ｔｉａｖｅ−Ｔｌｒｅｆ） ・Ｇ
ｃ −（６）なお、にｌは影響係数、Ｇｃはコントロ
ールゲインである。Δul = i (Tiave-Tlref) ・G
c - (6) where l is an influence coefficient and Gc is a control gain.
かくして、各冷却バンク２−１〜２− ｎにおける冷却
水の流量が求められ、この流量に従って冷却水が熱間鋼
帯２０に向って噴出される。Thus, the flow rate of cooling water in each cooling bank 2-1 to 2-n is determined, and the cooling water is jetted toward the hot steel strip 20 according to this flow rate.
このように上記一実施例においては、熱間鋼帯２０の熱
伝導に関する物性値から熱′間鋼帯２０の厚み方向に対
する温度分布を推定し、この推定された推定温度分布と
裏面側に配置された各表面温度計で２１．２２．２３で
測定された実績表面温度とから熱間鋼帯２０の平均温度
を推定し、この推定された平均温度と目標温度とから冷
却工程における熱間鋼帯２０に対する冷却量を求める構
成としたので、熱間鋼帯２０の表面温度を正確に測定す
ることができ、かつこの実績表面温度及び熱間鋼帯２０
の厚み方向の温度分布を考慮して正確な冷却量を求める
ことができる。従って、目標温度に対して正確に熱間鋼
帯２０の温度を制御できて所望の性質を持った材質の圧
延体を得ることができる。In this way, in the above embodiment, the temperature distribution in the thickness direction of the hot steel strip 20 is estimated from the physical property values regarding heat conduction of the hot steel strip 20, and the temperature distribution in the thickness direction of the hot steel strip 20 is The average temperature of the hot steel strip 20 is estimated from the actual surface temperature measured on 21.22.23 with each surface thermometer, and the hot steel strip 20 in the cooling process is estimated from the estimated average temperature and the target temperature. Since the cooling amount for the strip 20 is determined, the surface temperature of the hot steel strip 20 can be accurately measured, and the actual surface temperature and the hot steel strip 20 can be measured accurately.
Accurate cooling amount can be determined by considering the temperature distribution in the thickness direction. Therefore, the temperature of the hot steel strip 20 can be controlled accurately with respect to the target temperature, and a rolled body made of a material having desired properties can be obtained.
なお、本発明は上記一実施例に限定されるものでなくそ
の主旨を逸脱しない範囲で変形してもよい。例えば、第
６図に示すように冷却バンク４０．４１との間に表面温
度計４２を配置した場合、上記一実施例と同様に表面温
度計４２からの実績表面温度を受けて制御装置４３をフ
ィードバック（ＦＢ）系に配置して表面温度計４２より
上流側に配置した冷却バンク４０の冷却水量を制御した
り、又同表面温度計４２から′の実績表面温度を受けて
制御装置４４をフィードフォワード（Ｆ Ｆ）系に配置
して表面温度計４２の下流側の冷却バンク４１の冷却水
量を制御する構成にしてもよい。Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof. For example, when the surface thermometer 42 is disposed between the cooling banks 40 and 41 as shown in FIG. It is arranged in the feedback (FB) system to control the amount of cooling water in the cooling bank 40 arranged upstream from the surface thermometer 42, and also feeds the control device 44 by receiving the actual surface temperature '' from the surface thermometer 42. It may be arranged in a forward (FF) system to control the amount of cooling water in the cooling bank 41 downstream of the surface thermometer 42.
又、表面温度計は冷却水等の影響を受けない位置であれ
ば表裏いずれに配置してもよい。Further, the surface thermometer may be placed on either the front or the back as long as it is not affected by cooling water or the like.
以上詳記したよ、うに本発明によれば、冷却工程内で熱
間鋼帯の表面温度を測定できかつ熱間鋼帯る。As described in detail above, according to the present invention, the surface temperature of the hot steel strip can be measured during the cooling process and the hot steel strip can be heated.
第１図乃至第５図は本発明に係わる熱間鋼帯の冷却制御
装置の一実施例を説明するための図であって、第１図は
構成図、第２図は冷却バンクの構成図、第３図は裏面温
度を示す図、第４図は厚み方向の温度分布の推定を説明
するための模式図、第５図は推定温度を示す図、第６図
は本発明装置の変形例を示す構成図である。
１・・・仕上げ圧延機、２−１〜２− ｎ・・・冷却バ
ンク、３−１〜３−５・・・注水用スプレ、４−１〜４
−４・・・注水用スプレ、５−１〜５−５・・・ローラ
、２０・・・熱間鋼帯、２１．２２．２３・・・表面温
度計、３０・・・制御装置、３１・・・温度分布推定手
段、３２・・・平均温度推定手段、３３・・・冷却量調
整手段。
出願人代理人 弁理士 鈴江武彦
第３図
第４図
第５図
第６図
手続補正書
昭和 嬢・２．１負−７日1 to 5 are diagrams for explaining an embodiment of a cooling control device for a hot steel strip according to the present invention, in which FIG. 1 is a configuration diagram and FIG. 2 is a configuration diagram of a cooling bank. , FIG. 3 is a diagram showing back surface temperature, FIG. 4 is a schematic diagram for explaining estimation of temperature distribution in the thickness direction, FIG. 5 is a diagram showing estimated temperature, and FIG. 6 is a modification of the device of the present invention. FIG. 1... Finish rolling mill, 2-1 to 2-n... Cooling bank, 3-1 to 3-5... Water injection spray, 4-1 to 4
-4...Water injection spray, 5-1 to 5-5...Roller, 20...Hot steel strip, 21.22.23...Surface thermometer, 30...Control device, 31 . . . Temperature distribution estimation means, 32 . . . Average temperature estimation means, 33 . . . Cooling amount adjustment means. Applicant's representative Patent attorney Takehiko Suzue Figure 3 Figure 4 Figure 5 Figure 6 Procedural amendment form Showa Ms. 2.1 Negative - 7 days
Claims (1)
の冷却制御装置において、前記冷却工程における冷却水
等の影響を受けない前記熱間鋼帯の一方面側に配置され
てこの熱間鋼帯の表面温度を測定する表面温度計と、前
記熱間鋼帯の熱伝導に関する物性値から前記熱間鋼帯の
厚み方向に対する温度分布を推定する温度分布推定手段
と、この温度推定手段により推定された推定温度分布と
前記表面温度計で測定された実績表面温度とから前記熱
間鋼帯の平均温度を推定する平均温度推定手段と、この
平均温度推定手段により推定された平均温度と目標温度
とから前記冷却工程における前記熱間鋼帯に対する前記
冷却量を求める冷却量調整手段とを具備したことを特徴
とする熱間鋼帯の冷却制御装置。In a hot-work steel strip cooling control device that controls the amount of cooling in the cooling process of the hot-work steel strip, it is arranged on one side of the hot-work steel strip that is not affected by cooling water, etc. in the cooling process. A surface thermometer for measuring the surface temperature of the hot-worked steel strip; a temperature distribution estimating means for estimating the temperature distribution in the thickness direction of the hot-worked steel strip from physical property values related to heat conduction of the hot-worked steel strip; and the temperature estimation means. an average temperature estimating means for estimating the average temperature of the hot-worked steel strip from the estimated temperature distribution estimated by the method and the actual surface temperature measured by the surface thermometer; and the average temperature estimated by the average temperature estimating means. A cooling control device for a hot steel strip, comprising a cooling amount adjusting means for determining the cooling amount for the hot steel strip in the cooling step from a target temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152722A JPS63317208A (en) | 1987-06-19 | 1987-06-19 | Control device for cooling hot rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152722A JPS63317208A (en) | 1987-06-19 | 1987-06-19 | Control device for cooling hot rolled steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63317208A true JPS63317208A (en) | 1988-12-26 |
| JPH0525567B2 JPH0525567B2 (en) | 1993-04-13 |
Family
ID=15546721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62152722A Granted JPS63317208A (en) | 1987-06-19 | 1987-06-19 | Control device for cooling hot rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63317208A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361312A (en) * | 2001-06-13 | 2002-12-17 | Kawasaki Steel Corp | Method for cooling thick and high tensile strength hot rolled steel strip |
| KR100568346B1 (en) * | 2001-12-17 | 2006-04-05 | 주식회사 포스코 | A method for controlling the bar temperature by predicting the rougher delivery temperature |
| JP2009160599A (en) * | 2007-12-28 | 2009-07-23 | Kobe Steel Ltd | Method of predicting temperature of rolled stock, method of controlling cooling system for rolled stock and continuous rolling equipment |
| JP2015134951A (en) * | 2014-01-17 | 2015-07-27 | Ｊｆｅスチール株式会社 | Cooling control device and cooling control method |
| JP2016203239A (en) * | 2015-04-28 | 2016-12-08 | Ｊｆｅスチール株式会社 | Temperature correction device and temperature correction method of long-length steel material, cooling device and cooling method of long-length steel material, and manufacturing equipment and manufacturing method of rail |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4894686B2 (en) * | 2007-09-03 | 2012-03-14 | 住友金属工業株式会社 | Manufacturing method and manufacturing apparatus for hot-rolled steel sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6250010A (en) * | 1985-08-30 | 1987-03-04 | Kawasaki Steel Corp | Improvement of accuracy of controlled cooling stop temperature |
| JPS63168211A (en) * | 1986-12-27 | 1988-07-12 | Sumitomo Metal Ind Ltd | Temperature control method for hot rolling process |
-
1987
- 1987-06-19 JP JP62152722A patent/JPS63317208A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6250010A (en) * | 1985-08-30 | 1987-03-04 | Kawasaki Steel Corp | Improvement of accuracy of controlled cooling stop temperature |
| JPS63168211A (en) * | 1986-12-27 | 1988-07-12 | Sumitomo Metal Ind Ltd | Temperature control method for hot rolling process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002361312A (en) * | 2001-06-13 | 2002-12-17 | Kawasaki Steel Corp | Method for cooling thick and high tensile strength hot rolled steel strip |
| JP4677685B2 (en) * | 2001-06-13 | 2011-04-27 | Ｊｆｅスチール株式会社 | Cooling method for thick-walled high-tensile hot-rolled steel strip |
| KR100568346B1 (en) * | 2001-12-17 | 2006-04-05 | 주식회사 포스코 | A method for controlling the bar temperature by predicting the rougher delivery temperature |
| JP2009160599A (en) * | 2007-12-28 | 2009-07-23 | Kobe Steel Ltd | Method of predicting temperature of rolled stock, method of controlling cooling system for rolled stock and continuous rolling equipment |
| JP2015134951A (en) * | 2014-01-17 | 2015-07-27 | Ｊｆｅスチール株式会社 | Cooling control device and cooling control method |
| JP2016203239A (en) * | 2015-04-28 | 2016-12-08 | Ｊｆｅスチール株式会社 | Temperature correction device and temperature correction method of long-length steel material, cooling device and cooling method of long-length steel material, and manufacturing equipment and manufacturing method of rail |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0525567B2 (en) | 1993-04-13 |
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