JP3118343B2 - Method for reducing skid mark of hot finished rolled material - Google Patents
Method for reducing skid mark of hot finished rolled materialInfo
- Publication number
- JP3118343B2 JP3118343B2 JP05064417A JP6441793A JP3118343B2 JP 3118343 B2 JP3118343 B2 JP 3118343B2 JP 05064417 A JP05064417 A JP 05064417A JP 6441793 A JP6441793 A JP 6441793A JP 3118343 B2 JP3118343 B2 JP 3118343B2
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- Prior art keywords
- rolled material
- rolling
- hot
- stands
- stand
- Prior art date
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱間圧延に関し、特に
タンデム熱間仕上圧延に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hot rolling, and more particularly to tandem hot finishing rolling.
【０００２】[0002]
【従来の技術】鋼材を加熱炉で所定温度に加熱し、粗圧
延を経て熱間タンデム仕上圧延で所片板厚の熱延鋼板を
得る圧延では、加熱炉を出た鋼材の、加熱炉において鋼
材を支えるスキッドに位置した部位の温度が低く、この
温度が低い部位はスキッドマ-クと称される。このスキ
ッドマ−クは粗圧延を経ても熱延鋼板に残り、熱間タン
デム仕上圧延で板厚精度を上げにくい１つの原因となっ
ている。2. Description of the Related Art In rolling in which a steel material is heated to a predetermined temperature in a heating furnace and then subjected to rough tandem and hot tandem finishing rolling to obtain a hot-rolled steel sheet having a predetermined thickness, the steel material exiting the heating furnace is subjected to a The temperature of the part located on the skid that supports the steel material is low, and the part with this low temperature is called a skid mark. This skid mark remains on the hot-rolled steel sheet even after rough rolling, and is one of the causes of difficulty in increasing the thickness accuracy by hot tandem finish rolling.
【０００３】すなわち、タンデム熱間圧延では、板厚が
目標値となるように圧下等を制御する板厚制御が実施さ
れるが、このスキッドマ−クが板厚制御にいわば外乱と
して作用し、板厚制御の安定性と制御精度を乱す。板厚
制御は例えば、特公平２−３１６０４号公報に開示さ
れ、また、本発明者らは、鋼板圧延中に、圧下位置をフ
ィードフォワード制御する板厚制御方法を特願平２−４
０４４２４号として提案した。この種の熱間圧延制御装
置の一例を図３を用いて以下に説明する。That is, in tandem hot rolling, sheet thickness control for controlling reduction and the like is performed so that the sheet thickness becomes a target value. This skid mark acts as a disturbance to the sheet thickness control, so that the sheet thickness is controlled. Disturbs stability and control accuracy of thickness control. The thickness control is disclosed, for example, in Japanese Patent Publication No. 2-3604, and the present inventors have proposed a thickness control method for feed-forward control of a rolling position during rolling of a steel sheet.
No. 04424. An example of this type of hot rolling control device will be described below with reference to FIG.
【０００４】図３は、熱間タンデム圧延機であり、７つ
の圧延スタンド，スタンド間のルーパ，圧下制御装置及
びルーパ制御装置により構成されている。図３におい
て、Ｓ0はロールギャップ（以下、圧下位置と称する）
検出器、ＬＣは圧延荷重計、ＳＭは圧下位置駆動系、Ａ
ＧＣはＳOの出力（圧下位置）とＬＣの出力（圧延荷
重）から圧下位置変更量を算出する自動板内板厚偏差制
御(Automatic Gauge Control)装置であり、ＳＲＡはＡ
ＧＣの指定した量だけ圧下位置を動かす制御系である。
圧延機のワークロールは、駆動用モータＭで駆動され、
ルーパは、ルーパモータＩＭで駆動される。圧延材の張
力とルーパの高さ（角度θ）を制御するために、高さ制
御装置Ｈ．Ｃ．と張力制御装置Ｃ．Ｃ．により、ワーク
ロール駆動モータＭとルーパモータＩＭの回転速度の変
更量がそれぞれ算出される。ワークロールの駆動用モー
タＭの回転速度の変更量はＳＲに送られ、ＳＲによりモ
ータＭの速度が指定量だけ変更される。なお、ＳＵＣ
は、サクセッシブと称され、マスフロー制御のための、
ワ−クロ−ル駆動モ−タＭの速度変更量である。また、
Ｘ−ＲＡＹモニタによる検出板厚をフィ−ドバックして
板厚制御し、各スタンドでの圧下位置変更量等の情報を
次段に伝送して、フィードフォワード制御を行ってい
る。 図３に示すように、従来の熱間圧延機は、基本的
に圧下位置制御により圧延材の板厚精度を確保し、ワー
クロールのロール周速度（以下、ロール周速と称する）
とルーパの高さにより圧延材の張力を制御している。FIG. 3 shows a hot tandem rolling mill, which is composed of seven rolling stands, a looper between stands, a rolling-down control device, and a looper control device. In FIG. 3, S 0 is a roll gap (hereinafter, referred to as a roll-down position).
Detector, LC: rolling load cell, SM: rolling position drive system, A
GC is the output (pressing position) and the output of the LC automatic plate thickness deviation control for calculating a pressing position change amount from (rolling load) (Automatic Gauge Control) device S O, SRA is A
This is a control system that moves the rolling-down position by the amount specified by GC.
The work roll of the rolling mill is driven by a driving motor M,
The looper is driven by a looper motor IM. In order to control the tension of the rolled material and the height (angle θ) of the looper, a height control device H. C. And tension control device C. C. Thereby, the change amounts of the rotation speeds of the work roll drive motor M and the looper motor IM are calculated. The amount of change in the rotation speed of the work roll driving motor M is sent to the SR, and the speed of the motor M is changed by the SR by the specified amount. In addition, SUC
Is called Successive, for mass flow control,
This is the speed change amount of the walk-wheel drive motor M. Also,
The thickness of the plate detected by the X-RAY monitor is fed back to control the plate thickness, and information such as the amount of change in the rolling position at each stand is transmitted to the next stage to perform feedforward control. As shown in FIG. 3, a conventional hot rolling mill basically secures the thickness accuracy of a rolled material by controlling a rolling position and a roll peripheral speed of a work roll (hereinafter, referred to as a roll peripheral speed).
And the tension of the rolled material is controlled by the height of the looper.
【０００５】[0005]
【発明が解決しようとする課題】粗圧延後熱間タンデム
仕上圧延機に噛込む前に誘導加熱装置により圧延材を加
熱してスキッドマ−クを除去することは出来るが、仕上
圧延機に噛込む前は圧延材の温度が高く、スケ−ルの発
生を多くすることになるので、圧延材の品質低下を招
く。熱間タンデム仕上圧延機のスタンド間には上述の張
力制御用のル−パがあるので、誘導加熱装置を配置する
ことができず、スタンド間でスキッドマ−ク除去用の加
熱を行なうことができない。誘導加集装置を用いた熱延
鋼板の加熱装置として、鋼板エッジの再加熱を行なうエ
ッジヒ−タがあり、例えば特開平２−４３７２８号公報
に開示されているが、鋼板のエッジ部しか加熱されず、
スキッドマ−クを除去することはできない。Although the rolled material can be heated by an induction heating device to remove a skid mark before it is engaged in a hot tandem finishing mill after rough rolling, it can be engaged in a finishing mill. Before, the temperature of the rolled material is high and the scale is increased, so that the quality of the rolled material is deteriorated. Since there is a loop for tension control as described above between the stands of the hot tandem finishing mill, it is not possible to arrange an induction heating device, and it is not possible to perform heating for removing skid marks between the stands. . As an apparatus for heating a hot-rolled steel sheet using an induction collector, there is an edge heater for reheating the edge of the steel sheet. For example, as disclosed in Japanese Patent Application Laid-Open No. 2-43728, only the edge of the steel sheet is heated. Without
The skid mark cannot be removed.
【０００６】本発明は、熱間タンデム仕上圧延において
スケ−ルの発生を抑えつつ圧延材のスキッドマ−クを低
減することを目的とする。An object of the present invention is to reduce the skid mark of a rolled material while suppressing the occurrence of scale in hot tandem finish rolling.
【０００７】[0007]
【課題を解決するための手段】本発明は、ル−パレス圧
延を行う熱間タンデム仕上圧延において、その前段の粗
圧延を出た圧延材の温度を計測して該圧延材の長手方向
の温度変動周期および位相を算出し、熱間タンデム仕上
圧延の＃１−＃２スタンド間もしくは＃２−＃３スタン
ド間で、前記温度変動周期および位相を該スタンド間の
圧延材のものに変換した周期および位相で、圧延材に近
接した加熱装置で、圧延材の少くとも長手方向低温部を
加熱する。SUMMARY OF THE INVENTION The present invention relates to a hot tandem finish rolling for loop-less rolling, which measures the temperature of a rolled material that has undergone rough rolling at the preceding stage and measures the temperature in the longitudinal direction of the rolled material. The fluctuation period and phase are calculated, and the temperature fluctuation period and phase are converted to those of the rolled material between the stands between # 1 and # 2 stands or between # 2 and # 3 stands of hot tandem finish rolling. In a phase, at least a longitudinal low temperature part of the rolled material is heated by a heating device close to the rolled material.
【０００８】[0008]
【作用】熱延鋼板の数種の板厚において、その温度の所
要変更量に対する所要加熱量の一例を図１に示す。図１
より、例えば、熱板鋼板の板厚が８．５ｍｍの場合は、
熱延鋼板を０．５秒で５°Ｃ高く加熱するためには260
〔Kcal/m2°Chr〕の加熱量が必要である。また、熱間タ
ンデム仕上圧延（＃１〜＃７スタンド）のスタンド間で
の熱延鋼板の板厚，板速度およびスタンド間通過速度の
一例を表１に示す。FIG. 1 shows an example of the required heating amount with respect to the required change amount of the temperature at several thicknesses of the hot-rolled steel sheet. FIG.
Therefore, for example, when the thickness of the hot plate steel plate is 8.5 mm,
In order to heat a hot-rolled steel sheet 5 ° C higher in 0.5 seconds, 260
A heating amount of [Kcal / m 2 ° Chr] is required. Table 1 shows an example of the thickness, the sheet speed, and the stand-to-stand passing speed of the hot-rolled steel sheet between the stands of the hot tandem finish rolling (stands # 1 to # 7).
【０００９】[0009]
【表１】 [Table 1]
【００１０】表１に示す熱間タンデム仕上圧延では、＃
２−＃３スタンド間の熱延鋼板の通過時間は１．９４秒
であるから、５°Ｃ高く加熱するためには65 〔Kcal/m2
°Chr〕の加熱量で加熱すればよい。In the hot tandem finish rolling shown in Table 1,
Since the passage time of the hot-rolled steel sheet between the 2- # 3 stands is 1.94 seconds, 65 [Kcal / m 2
° Chr].
【００１１】図１に示す条件より、熱延鋼板を＃２−＃
３スタンド間で５°Ｃ以上高くする加熱を行なうために
は、加熱装置により65 〔Kcal/m2 °Chr〕以上の加熱を
すればよく、＃１−＃２スタンド間で５°Ｃ以上高くす
る加熱を行なうためには、そこでは板厚が15.00mm(表1)
であるので、65×15/8.5＝115 〔Kcal/m2°Chr〕以上の
加熱をすればよい。According to the conditions shown in FIG.
In order to perform heating to increase the temperature by 5 ° C. or more between the three stands, the heating device may be used to perform heating of 65 [Kcal / m 2 ° Chr] or more. In order to perform the heating, the plate thickness is 15.00mm (Table 1)
Therefore, the heating may be performed at 65 × 15 / 8.5 = 115 [Kcal / m 2 ° Chr] or more.
【００１２】65 〔Kcal/m2°Chr〕以上の加熱量は比較
的に大きな加熱能であるが、本発明では張力制御のため
の従来のル−パがないので、加熱装置を熱延鋼板に近接
（例えば鋼板から４〜５ｃｍ）して配置して65 〔Kcal/
m2 °Chr〕以上の加熱量を実現した。加熱能は熱延鋼板
との距離の2乗に反比例するので、従来の、鋼板から45
〜50cm程度の、例えば5 〔Kcal/m2°Chr〕程度の加熱量
の加熱装置を用いることができる。A heating amount of 65 [Kcal / m 2 ° Chr] or more is a relatively large heating capacity, but in the present invention, since there is no conventional looper for tension control, a heating device is used for a hot-rolled steel plate. (For example, 4-5cm from a steel plate) and 65 [Kcal /
m 2 ° Chr] or more. Since the heating capacity is inversely proportional to the square of the distance to the hot-rolled steel sheet,
A heating device having a heating amount of about 50 cm, for example, about 5 [Kcal / m 2 ° Chr] can be used.
【００１３】本発明では、このように近接加熱により熱
延鋼板を加熱する。熱間タンデム仕上圧延における熱延
鋼板のスキッドマ−クは熱延鋼板の長手方向に所定周期
で分布する。したがって、粗圧延を出た圧延材の温度を
計測して該圧延材の長手方向の温度変動周期および位相
を算出し、熱間タンデム仕上圧延の＃１−＃２スタンド
間もしくは＃２−＃３スタンド間で、前記温度変動周期
および位相を該スタンド間の圧延材のものに変換した周
期および位相で、圧延材に近接した加熱装置で、圧延材
の少くとも長手方向低温部を加熱することにより、スキ
ッドマ−クが除去もしくは低減する。In the present invention, the hot-rolled steel sheet is heated by proximity heating as described above. The skid mark of the hot-rolled steel sheet in the hot tandem finish rolling is distributed at a predetermined period in the longitudinal direction of the hot-rolled steel sheet. Therefore, the temperature of the rolled material that has undergone rough rolling is measured, and the temperature fluctuation cycle and phase in the longitudinal direction of the rolled material are calculated, and between the # 1 and # 2 stands or # 2 and # 3 of the hot tandem finish rolling. Between stands, at a period and phase obtained by converting the temperature fluctuation period and phase to those of the rolled material between the stands, by heating at least a longitudinal low temperature portion of the rolled material by a heating device close to the rolled material. , Skid marks are eliminated or reduced.
【００１４】[0014]
【実施例】図２に本発明の一実施態様を示す。この例で
は、＃２−＃３スタンド間に、熱延鋼板の上，下に熱延
鋼板から５ｃｍ離して0〜600 〔Kcal/m2 °Chr〕の近接
誘導加熱装置を配置した。図示しない粗圧延機出側で熱
延鋼板の温度を連続的に測定しこれを周波数解析装置
で、熱延鋼板長手方向で平滑化して、粗圧延機出側での
熱延鋼板の長手方向温度分布の周期Ｐｔｉと、該熱延鋼
板の先端の該周期上の位相Ｐｈｉを算出し、該周期Ｐｔ
ｉを＃１スタンドの通板速度に基づいて＃１スタンド−
＃２スタンド間での周期Ｐｔ１２に変換し更に＃２スタ
ンドの通板速度に基づいて＃２スタンド−＃３スタンド
間での周期Ｐｔ２３に変換する。更に、粗圧延機出側で
の熱延鋼板の長手方向温度分布の下ピ−ク／上ピ−ク間
の温度差（振幅）Ｐｗｉを算出し、この振幅Ｐｗｉを＃
１スタンドの圧延条件に基づいて＃１スタンド−＃２ス
タンド間での振幅Ｐｗ１２に変換し、更に＃２スタンド
の圧延条件に基づいて＃２スタンド−＃３スタンド間で
の振幅Ｐｗ２３に変換する。そして算出した周期Ｐｔ２
３，位相Ｐｈｉおよび振幅Ｐｗ２３を、電流＆タイミン
グコントロ−ラに与える。FIG. 2 shows an embodiment of the present invention. In this example, a proximity induction heating device of 0 to 600 [Kcal / m 2 ° Chr] was placed between the # 2 and # 3 stands above and below the hot-rolled steel sheet and 5 cm away from the hot-rolled steel sheet. The temperature of the hot-rolled steel sheet is continuously measured at the exit of the rough rolling mill (not shown), and the temperature is smoothed in the longitudinal direction of the hot-rolled steel sheet by a frequency analysis device. A distribution cycle Pti and a phase Phi of the tip of the hot-rolled steel sheet on the cycle are calculated, and the cycle Pt is calculated.
i is set to the # 1 stand based on the passing speed of the # 1 stand.
The period is converted into a period Pt12 between the # 2 stands and further converted into a period Pt23 between the # 2 stand and the # 3 stand based on the passing speed of the # 2 stand. Further, a temperature difference (amplitude) Pwi between the lower peak and the upper peak of the temperature distribution in the longitudinal direction of the hot-rolled steel sheet on the exit side of the rough rolling mill is calculated, and this amplitude Pwi is expressed by #.
Based on the rolling conditions of one stand, the amplitude is converted to the amplitude Pw12 between the # 1 stand and the # 2 stand, and further converted to the amplitude Pw23 between the # 2 stand and the # 3 stand based on the rolling condition of the # 2 stand. And the calculated cycle Pt2
3. The phase Phi and the amplitude Pw23 are given to the current & timing controller.
【００１５】電流＆タイミングコントロ−ラは、与えら
れたＰｔ２３，位相Ｐｈｉおよび振幅Ｐｗ２３ならびに
＃２スタンドの通板速度に基づいて、１周期分の、熱延
鋼板上の長手方向温度分布と逆位相の加熱量変更パタ−
ン（経過時間対投入加熱量）を作成し、この加熱量変更
パタ−ンに、＃３スタンドでの板厚制御から要求される
加熱量分をバイアス加算し、そして得られたパタ−ンの
加熱量をそれを発生する誘導加熱コイル電流に変換（加
熱量変更パタ−ンを電流値変更パタ−ンに変換）する。
そして、熱延鋼板の先端が＃２スタンドに噛込んでから
該先端が近接誘導加熱装置に到達するタイミングで、該
加熱量変更パタ−ンの、前記位相Ｐｈｉに対応する位相
の電流値から、電源コントロ−ラに通電指示する。Based on the given Pt23, phase Phi and amplitude Pw23, and the passing speed of the # 2 stand, the current & timing controller calculates the phase distribution of the longitudinal direction on the hot-rolled steel sheet for one cycle, Heating amount change pattern
(Elapsed time vs. input heating amount), a heating amount required from the thickness control at the # 3 stand is added to this heating amount change pattern by bias, and the obtained pattern is The heating amount is converted into an induction heating coil current that generates the heating amount (a heating amount changing pattern is converted into a current value changing pattern).
Then, at the timing when the tip of the hot-rolled steel sheet reaches the proximity induction heating device after the tip of the hot-rolled steel sheet has bitten into the # 2 stand, the current value of the phase corresponding to the phase Phi of the heating amount changing pattern is calculated as follows. Instructs the power supply controller to energize.
【００１６】これにより、粗圧延機出側での熱延鋼板の
長手方向温度分布に対応する、＃２−＃３スタンド間の
熱延鋼板の長手方向温度分布に逆対応したレベルの電流
が近接誘導加熱装置の電気コイルに流れ、粗圧延機出側
での熱延鋼板の長手方向温度分布で低温度（スキッドマ
−ク）であった所は高加熱量となり、高温度であった所
は低加熱もしくは加熱なしとなって、＃２−＃３スタン
ド間で熱延鋼板の長手手方向温度分布が均一化する。す
なわちスキッドマ−クが除去される。もしくは低減す
る。As a result, a current of a level close to the longitudinal temperature distribution of the hot-rolled steel sheet between the # 2 and # 3 stands, which corresponds to the longitudinal temperature distribution of the hot-rolled steel sheet on the exit side of the rough rolling mill, becomes close to the current. It flows into the electric coil of the induction heating device, and in the longitudinal temperature distribution of the hot-rolled steel sheet at the exit side of the rough rolling mill, a portion with a low temperature (skid mark) has a high heating amount, and a portion with a high temperature has a low temperature With or without heating, the temperature distribution in the longitudinal direction of the hot-rolled steel sheet becomes uniform between the stands # 2 and # 3. That is, the skid mark is removed. Or reduce.
【００１７】この実施例では、図２に示す熱間タンデム
仕上圧延の板厚制御は、特願平４−６２４０３号に提示
したもので行なう。すなわち、ｉ−１スタンドとｉスタ
ンドの間に設置された張力計の圧延材の張力計測値と目
標張力の差△Ｔ(i)に基づいてｉスタンドの圧下位置変
更量を算出し、ｉ−１スタンド出側に設置された板厚計
により計測された板厚偏差Ｈi−Ｈsiとｉ−１スタンド
出側に設置された板速度計により計測された圧延材速度
Ｖ(i-1)に基づいてｉスタンドの圧下位置変更量を算出
し、両圧下位変更量の和△Ｓ(i)を算出し、該圧下位置
修正量△Ｓ(i)に基づいてｉスタンドの圧下位置駆動手
段により圧下位置を修正する、タンデム圧延機の隣り合
うスタンド間に入る圧延材の単位時間あたりの質量と当
該スタンド間から出る圧延材の単位時間あたり圧延材の
質量が等しくなるように圧下位置とロール周速度を制御
する。これによりル−パは省略され、にもかかわらず熱
延鋼板の張力は目標張力に制御され、板厚精度が高い。
このル−パの省略により、上述のように、板厚制御系を
格別に乱すことなく、熱延鋼板から４〜５ｃｍ離して加
熱装置を配設することが可能となった。In this embodiment, the thickness control of the hot tandem finish rolling shown in FIG. 2 is performed according to the method disclosed in Japanese Patent Application No. 4-62403. That is, based on the difference ΔT (i) between the measured value of the tension of the rolled material of the tension meter installed between the i-1 stand and the i stand and the target tension ΔT (i), the change amount of the rolling position of the i stand is calculated. Based on the sheet thickness deviation Hi-Hsi measured by a sheet thickness gauge installed on the exit side of one stand and the rolled material speed V (i-1) measured by a sheet speedometer installed on the exit side of the i-1 stand. The amount of change in the lowering position of the i-stand is calculated, the sum △ S (i) of both lower-order lowering amounts is calculated, and the lowering position driving means of the i-stand performs the lowering based on the lowering position correction amount △ S (i). Rolling speed and roll speed so that the mass per unit time of the rolled material entering between the adjacent stands of the tandem rolling mill and the mass of the rolled material exiting between the stands are equalized. Control. Accordingly, the looper is omitted, but the tension of the hot-rolled steel sheet is controlled to the target tension, and the thickness accuracy is high.
By omitting the looper, as described above, it became possible to dispose the heating device 4 to 5 cm away from the hot-rolled steel sheet without disturbing the sheet thickness control system.
【００１８】[0018]
【発明の効果】本発明では、上述のように熱間タンデム
仕上圧延機のスタンド間で、このように近接加熱により
熱延鋼板を周期的に、スキッドマ−ク部は高加熱するの
で、スキッドマ−クが除去もしくは低減する。加熱によ
るスケ−ルの発生は少い。According to the present invention, since the hot rolled steel sheet is periodically heated by proximity heating between the stands of the hot tandem finishing mill as described above, the skid mark portion is heated to a high level. Is removed or reduced. The generation of scale due to heating is small.
【図１】 熱延鋼板の板厚，所要温度上昇量、および、
該温度上昇量を得るための加熱量の関係を示すグラフで
ある。FIG. 1 shows the thickness of a hot-rolled steel sheet, the required temperature rise, and
It is a graph which shows the relationship of the heating amount for obtaining the said temperature rise amount.
【図２】 熱間タンデム仕上圧延設備を示すブロック図
であり、本発明の一実施態様を示す。FIG. 2 is a block diagram showing a hot tandem finishing mill, showing one embodiment of the present invention.
【図３】 従来の、ル−パにより熱延鋼板の張力を制御
する、熱間タンデム仕上圧延設備を示すブロック図であ
る。FIG. 3 is a block diagram showing a conventional hot tandem finish rolling equipment for controlling the tension of a hot-rolled steel sheet by a looper.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 狩 野 竜 一 富津市新富20−１ 新日本製鐵株式会社 技術開発本部内 (56)参考文献 特開 昭62−114715（ＪＰ，Ａ) 特開 平６−154831（ＪＰ，Ａ) 特開 平６−154826（ＪＰ，Ａ) 特開 平５−305324（ＪＰ，Ａ) 特開 平１−321009（ＪＰ，Ａ) 特開 昭61−169101（ＪＰ，Ａ) 特開 昭49−107951（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21B 45/00 B21B 37/18 B21B 37/76 ──────────────────────────────────────────────────続 き Continued on the front page (72) Ryuichi Karino, Inventor 20-1 Shintomi, Futtsu City Nippon Steel Corporation Technology Development Division (56) References JP-A-62-114715 (JP, A) JP-A-62-114715 JP-A-6-1544831 (JP, A) JP-A-6-154826 (JP, A) JP-A-5-305324 (JP, A) JP-A-1-3211009 (JP, A) JP-A-61-169101 (JP) , A) JP-A-49-107951 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B21B 45/00 B21B 37/18 B21B 37/76
Claims (2)
延において、その前段の粗圧延を出た圧延材の温度を計
測して該圧延材の長手方向の温度変動周期および位相を
算出し、熱間タンデム仕上圧延の＃１−＃２スタンド間
もしくは＃２−＃３スタンド間で、前記温度変動周期お
よび位相を該スタンド間の圧延材のものに変換した周期
および位相で、圧延材に近接した加熱装置で、圧延材の
少くとも長手方向低温部を加熱することを特徴とする熱
間圧延材の材質制御方法。In a hot tandem finish rolling in which loop-rolling is performed, the temperature of a rolled material that has undergone rough rolling in the preceding stage is measured to calculate a temperature fluctuation cycle and phase in the longitudinal direction of the rolled material, Between the # 1 and # 2 stands or between the # 2 and # 3 stands of hot tandem finish rolling, the temperature fluctuation period and phase are converted to those of the rolled material between the stands, and are close to the rolled material. A method for controlling the material quality of a hot-rolled material, comprising heating at least a low-temperature portion in the longitudinal direction of the rolled material by the heating device.
れた張力計の圧延材の張力計測値と目標張力の差△Ｔ
(i)に基づいてｉスタンドの圧下位置変更量を算出し、
ｉ−１スタンド出側に設置された板厚計により計測され
た板厚偏差Ｈi−Ｈsiとｉ−１スタンド出側に設置され
た板速度計により計測された圧延材速度Ｖ(i-1)に基づ
いてｉスタンドの圧下位置変更量を算出し、両圧下位変
更量の和△Ｓ(i)を算出し、該圧下位置修正量△Ｓ(i)に
基づいてｉスタンドの圧下位置駆動手段により圧下位置
を修正する、熱間タンデム仕上圧延機の隣り合うスタン
ド間に入る圧延材の単位時間あたりの質量と当該スタン
ド間から出る圧延材の単位時間あたり圧延材の質量が等
しくなるように圧下位置とロール周速度を制御する熱間
圧延において、熱間タンデム仕上圧延の前段の粗圧延を
出た圧延材の温度を計測して該圧延材の長手方向の温度
変動周期および位相を算出し、熱間タンデム仕上圧延の
＃１−＃２スタンド間もしくは＃２−＃３スタンド間
で、前記温度変動周期および位相を該スタンド間の圧延
材のものに変換した周期および位相で、圧延材に近接し
た加熱装置で、圧延材の少くとも長手方向低温部を高く
加熱することを特徴とする熱間圧延材の材質制御方法。2. The difference ΔT between the measured value of the tension of the rolled material and the target tension of the tension meter installed between the i-1 stand and the i stand.
Based on (i), calculate the amount of change in the rolling position of the i-stand,
The sheet thickness deviation Hi-Hsi measured by a sheet thickness gauge installed on the exit side of the i-1 stand and the rolled material velocity V (i-1) measured by a sheet speed meter installed on the exit side of the i-1 stand. , And calculates the sum △ S (i) of the two lower pressure change amounts, based on the lowering position correction amount △ S (i). In order to correct the rolling position, the rolling is performed such that the mass per unit time of the rolled material entering between the adjacent stands of the hot tandem finishing mill and the mass of the rolled material per unit time of the rolling material exiting between the stands become equal. In the hot rolling to control the position and the peripheral speed of the roll, the temperature fluctuation period and phase in the longitudinal direction of the rolled material are calculated by measuring the temperature of the rolled material that has undergone rough rolling in the previous stage of hot tandem finish rolling, Also between # 1 and # 2 stands of hot tandem finish rolling Or a period and a phase obtained by converting the temperature fluctuation period and the phase between the stands # 2 and # 3 to those of the rolled material between the stands, and using a heating device close to the rolled material and at least the longitudinal direction of the rolled material. A material control method for a hot-rolled material, wherein a low-temperature part is heated to a high temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05064417A JP3118343B2 (en) | 1993-03-23 | 1993-03-23 | Method for reducing skid mark of hot finished rolled material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05064417A JP3118343B2 (en) | 1993-03-23 | 1993-03-23 | Method for reducing skid mark of hot finished rolled material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06269835A JPH06269835A (en) | 1994-09-27 |
| JP3118343B2 true JP3118343B2 (en) | 2000-12-18 |
Family
ID=13257692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05064417A Expired - Fee Related JP3118343B2 (en) | 1993-03-23 | 1993-03-23 | Method for reducing skid mark of hot finished rolled material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3118343B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101523879B1 (en) | 2014-04-18 | 2015-05-28 | 김민석 | Equipped with a slipper ring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6615633B1 (en) | 1999-11-18 | 2003-09-09 | Nippon Steel Corporation | Metal plateness controlling method and device |
-
1993
- 1993-03-23 JP JP05064417A patent/JP3118343B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101523879B1 (en) | 2014-04-18 | 2015-05-28 | 김민석 | Equipped with a slipper ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06269835A (en) | 1994-09-27 |
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