JP2004188441A - Abnormality detection system for steel strip coil treatment line - Google Patents

Abnormality detection system for steel strip coil treatment line Download PDF

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Publication number
JP2004188441A
JP2004188441A JP2002357765A JP2002357765A JP2004188441A JP 2004188441 A JP2004188441 A JP 2004188441A JP 2002357765 A JP2002357765 A JP 2002357765A JP 2002357765 A JP2002357765 A JP 2002357765A JP 2004188441 A JP2004188441 A JP 2004188441A
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JP
Japan
Prior art keywords
steel strip
strip coil
payoff reel
abnormality
bridle roll
Prior art date
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Granted
Application number
JP2002357765A
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Japanese (ja)
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JP4293337B2 (en
Inventor
Toshiaki Sato
敏明 佐藤
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Nippon Steel Nisshin Co Ltd
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Nisshin Steel Co Ltd
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Priority to JP2002357765A priority Critical patent/JP4293337B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detection system for preventing occurrence of slip-out of a tail end of a steel strip coil in an inlet side deceleration control system of a steel strip coil treatment line. <P>SOLUTION: The abnormality detection system for the steel strip coil treatment line has a means for recognizing and notifying abnormality attributable to defective operation of sensors when the remaining length of the steel strip coil inserted in a payoff reel by a rotation detection sensor installed on the payoff reel and a PLG installed on an inlet side bridle roll is operated, and the inlet side deceleration of the steel strip coil is controlled based on the predetermined remaining length of the steel strip coil. Abnormality attributable to the defective operation of the sensors is determined by an inequality L<SB>n-1</SB>+α>L<SB>n</SB>, where L<SB>n</SB>is the feed of the steel strip by the bridle roll when the payoff reel makes one turn, L<SB>n-1</SB>is the feed of the steel strip by the bridle roll when the payoff reel makes one turn, and α is the correction value. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、鋼帯コイルを巻き戻し、酸洗、圧延、焼鈍、表面処理等を行なう鋼帯コイル処理ラインの入側減速装置に関するものである。
【0002】
【従来の技術】
従来より、コイル状に巻き取られた鋼帯を、次工程で巻き戻す際には鋼帯コイルの尾端がペイオフリールから抜け出すという問題が発生する場合がある。鋼帯コイル尾端がペイオフリールから高速で抜け出ると鋼帯コイル尾端がライン内で波打ち、周辺設備に接触し破損を招く恐れがあり、また、先行材と後行材を溶接する溶接機を有する連続ラインでは、先行材の鋼帯コイル尾端が溶接機の溶接位置に停止せず、後行材の鋼帯コイル先端との溶接ができず、ラインの停止およびそれに伴う品質異常を引き起こす恐れもある。
このような問題が生じないように、鋼帯コイルを巻き戻す際にコイル尾端が近づいてきたら巻き戻し速度を減速して、鋼帯コイルの尾端がペイオフリールから高速で抜け出すこと防止している。
【0003】
具体的には、ペイオフリールに設置された1回転を検出するセンサーと入側ブライドルロールに設置されたパルス発信機(以下、PLGと称する)により、ペイオフリールが一回転した時の鋼帯の送り量を入側ブライドルロールに設置したPLGのパルス値、およびブライドルロール径から算出し、ペイオフリールに挿入されている鋼帯コイルの外径を求め、さらにコイル内径、板厚から求めた鋼帯コイルの残長値に基づいて鋼帯コイル処理ラインの入側減速制御を行っている。
【0004】
特開平8−90060号には、鋼帯コイル残長値をあらかじめ設定し、この設定値に達した時点で減速開始時点の算出指令をし、ペイオフリールの回転数とライン速度からコイル外径を演算し、ペイオフリール1回転当たりの鋼帯コイル径の変化を算出して板厚を求め、ついで減速レートを求め、それに基づきラインを減速制御する方法が開示されている。
また、特開平7−88550号には、板厚変動による誤差を防止するため、コイルを巻き戻しながらコイル側面の板厚が認識可能な機能を有するカメラと画像処理装置により残り巻き数を測定し、コイルの残長の演算を行ない、ライン入側の自動減速を行う装置が開示されている。
【0005】
【発明が解決しようとする課題】
以上のように、鋼帯コイル処理ラインの入側減速制御においては、各種センサーや画像処理等により、鋼帯コイルの残長値を正確に把握するシステムが採用されているが、各種センサーや画像処理等が正常に作動しなかった場合の異常認識・回避システムに関しては言及されていない。
そのため、コイル尾端がペイオフリールからの高速の抜け出しによる鋼帯コイルの品質劣化や先行材と後行材との未溶接によるライン停止等を確実に防止する鋼帯コイル処理ラインの入側減速制御における異常認識・回避システムが必要とされている。
【0006】
【課題を解決するための手段】
本発明は以上の課題を解決するために、ペイオフリールに設置した回転検出センサー及び入側ブライドルロールに設置したPLGによりペイオフリールより巻き戻される鋼帯コイルの残長演算を行い、所定の鋼帯コイルの残長値に基づいて鋼帯コイルの入側減速制御を行う際に、回転検出センサーの作動不良に起因する異常を認識し通知する手段を備えた鋼帯コイル処理ラインにおける異常検出システムを提供する。
【0007】
また、回転検出センサーの動作不良に起因した異常は、ペイオフリールが1回転した際のブライドルロールによる鋼帯の送り量をL、ペイオフリールの前1回転のブライドルロールによる鋼帯の送り量をLn−1、補正値をαとするとき、
n−1+α>L
に従って判別される。
【0008】
【発明の実施の形態】
本発明の好適な実施の形態について詳しく説明する。
図1には、本発明の異常検出システムを挿入した鋼帯コイル処理ラインの入側減速制御装置の例を示している。
本発明の異常検出システムを挿入した鋼帯コイル処理ラインは、鋼帯コイル1、鋼帯コイルを巻き戻すペイオフリール2、ブライドルロール3、ペイオフリールの回転を検出するセンサー4、ブライドルロールのパルス値を測定するPLG5、通板中の鋼帯の板厚を測定するオンライン板厚計6、ペイオフリールに挿入されている鋼帯コイルの残長を演算する残長演算処理装置8、センサーの異常を認識し警報を発するセンサー異常警報装置9、ブライドルロール径等の条件を設定する装置10、鋼帯ライン入側のラインスピードを減速する入側減速制御装置11とから構成されている。
【0009】
図2には、本発明の制御フローの例を示している。
S0において、連続処理ラインの場合には前コイルと今回コイルの溶接完了時、バッチラインの場合には出側でテンションリールへの巻付け完了時に鋼帯コイルの残長演算処理が開始される。
【0010】
S1において、鋼帯コイル通板開始時に残長演算処理装置8がペイオフリールの回転センサー4、ブライドルロールのPLG5からのデータを受信し、センサー類が正常に作動しているかどうかを判別して、異常が認識された場合にはセンサー異常警報装置9により異常警報を発したり、あるいはパトライトを点灯させる。
これによりオペレーターは、鋼帯処理ラインにおけるセンサー類に生じた初期異常を認識でき、通板開始前に適切な対応を講じることができるので、ライン入側減速制御の不良状態での通板を防止することができる。
【0011】
S2では、残長演算処理装置8により、ペイオフリールの回転センサー4、ブライドルロールのPLG5からの受信したデータ、オンライン板厚計6で測定された鋼帯の板厚値及び外部入力により得られるブライドルロール径とからペイオフリール2に挿入されている鋼帯コイルの残長値をペイオフリールの1回転毎に求める。
例えば、ペイオフリール2に挿入されている鋼帯コイル1の外径をDPOR、同コイル内径をD、鋼帯コイル板厚をhとすると、ペイオフリール2に挿入されている鋼帯コイル1の残長Lは、下式(1)から求められる。
また、DPORは下式(2)から算出される。
L=(DPOR −D )/4h×π ・・・・・(1)
POR=C1BR/PBR×DBR ・・・・・(2)
ここで、C1BRはペイオフリールが1回転した時のブライドルロールに設置されたPLGの積算値、PBRはブライドルロールの1回転毎のパルス数、DBRはブライドルロール径を表す。
【0012】
S3では、センサーの監視を行いセンサー類の作動状況を判別する。
ここでは、ペイオフリール2が1回転した時のブライドルロール3の鋼帯の送り量をL、ペイオフリールの前1回転のブライドルロールの鋼帯の送り量をLn−1、補正値をαとして、下式(3)で判別される。
n−1+α>L・・・・・・・・・・(3)
その結果、鋼帯処理ラインにおけるセンサー類の異常が認識された場合には、異常警報を発したり、パトライトが点灯される。
これにより、オペレーターは、鋼帯処理ラインにおけるセンサー類に生じた異常を認識でき、適切な対応を講じることができるので、ライン入側減速制御の不良状態での通板を防止することができる。
【0013】
図3は上記判定手法を模式化したものである。
ペイオフリール2の回転とともにブライドルロール3の送り量は増加していき、ペイオフリールの回転検出センサー4がペイオフリールの1回転を検出したとき、上式(3)のLとして値が代入される(図3中bまたはa)。
このとき、ペイオフリールに挿入されている鋼帯コイル1の外周は巻き戻されるにつれて小さくなるため、ブライドルロールの送り量も同様に小さくなる。
すなわち、センサーが正常であれば、現在のペイオフリール1回転時のブライドルロールの送り量が、前回のペイオフリール1回転のブライドルロールの送り量よりも大きくなることはない。
逆に、回転検出センサーが作動不良の場合には、ペイオフリールの1回転を検出することができないため、ブライドルロールの送り量はペイオフリールの回転とともに増加し続けることになる(図3中c)。
つまり、前回のペイオフリール1回転のブライドルロールの送り量よりも大きくなり上式(3)が満たされないので異常と判別されることになる。
【0014】
補正値αをLn−1に加算したのは、例えば、鋼帯コイルの板厚が0.2mmのように薄い場合、Ln−1とLとの間には大きな差がないため、わずかな検出誤差でも異常と判定する可能性があるため、この検出誤差を許容するためである。
これにより、鋼帯コイルの板厚が薄い場合であっても、検出誤差による誤判定を防ぐことが可能となり、センサー類の異常を確実に認識することができる。
【0015】
S3でセンサー類の作動が正常と判定された場合には、S4で現在のペイオフリールに挿入されている鋼帯コイルの残長が、予め設定された入側減速制御範囲にあるかどうか判定し、入側減速制御範囲内であれば入側減速制御装置11に信号を送り、入側減速制御を行なう。
入側減速範囲外の場合には、再度、鋼帯コイルの残長演算処理であるS2以降の処理が繰り返えされる。
【0016】
【発明の効果】
以上のように、本発明によれば、鋼帯コイル尾端のペイオフリールからの高速の抜け出しによる鋼帯コイルの品質劣化や先行材と後行材との未溶接によるライン停止等を確実に防止でき、鋼帯コイル処理ラインの入側減速制御システムの異常を回避することができる。
【図面の簡単な説明】
【図1】本発明の異常検出システムを採用した鋼帯コイル処理ラインの入側減速制御装置の例
【図2】本発明の制御フロー
【図3】本発明の異常判別方法を説明する模式図
【符号の説明】
1 鋼帯コイル
2 ペイオフリール
3 ブライドルロール
4 ペイオフリールの回転検出センサー
5 ブライドルロールのパルス発信機(PLG)
6 オンライン板厚計
8 残長演算処理装置
9 センサー異常警報装置
10 条件設定装置
11 入側減速制御装置
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inlet side reduction device of a steel strip coil processing line for rewinding a steel strip coil, performing pickling, rolling, annealing, surface treatment, and the like.
[0002]
[Prior art]
Conventionally, when the steel strip wound in a coil shape is unwound in the next step, a problem may occur that the tail end of the steel strip coil comes off the payoff reel. If the tail end of the steel strip coil comes out of the payoff reel at high speed, the tail end of the steel strip coil undulates in the line, which may cause damage by contacting peripheral equipment. In a continuous line, the tail end of the steel strip coil of the preceding material does not stop at the welding position of the welding machine, and welding with the tip of the steel strip coil of the following material cannot be performed, which may cause the line to stop and the resulting quality abnormality There is also.
In order to prevent such a problem from occurring, when the coil tail is approaching when rewinding the steel strip coil, the rewind speed is reduced to prevent the tail end of the steel strip coil from slipping out of the payoff reel at a high speed. I have.
[0003]
Specifically, a sensor for detecting one rotation provided on the payoff reel and a pulse transmitter (hereinafter, referred to as PLG) provided on the entrance bridle roll feed the steel strip when the payoff reel makes one rotation. The amount was calculated from the pulse value of the PLG installed on the entrance bridle roll and the bridle roll diameter, the outer diameter of the steel strip coil inserted into the payoff reel, and the steel strip coil determined from the coil inner diameter and plate thickness The deceleration control on the entry side of the steel strip coil processing line is performed on the basis of the remaining length value.
[0004]
In Japanese Patent Application Laid-Open No. 8-90060, a steel strip coil residual length value is set in advance, and when the set value is reached, a deceleration start time calculation command is issued, and the coil outer diameter is calculated from the payoff reel rotation speed and line speed. A method is disclosed in which the thickness of the steel strip is calculated by calculating the change in the diameter of the coil of the steel strip per rotation of the payoff reel, then the deceleration rate is determined, and the line is decelerated based on the deceleration rate.
Japanese Patent Application Laid-Open No. 7-88550 discloses that in order to prevent an error due to a change in plate thickness, the number of remaining turns is measured by a camera having a function of recognizing the plate thickness on the side surface of the coil while rewinding the coil and an image processing device. A device for calculating the remaining length of the coil and performing automatic deceleration on the line entrance side is disclosed.
[0005]
[Problems to be solved by the invention]
As described above, in the entry side deceleration control of the steel strip coil processing line, a system that accurately grasps the remaining length value of the steel strip coil by using various sensors and image processing is adopted. No mention is made of an abnormality recognition / avoidance system in the event that processing or the like does not operate normally.
Therefore, the entrance side deceleration control of the steel strip coil processing line that reliably prevents quality deterioration of the steel strip coil due to the coil tail end slipping out of the payoff reel at high speed and line stoppage due to unwelding of the preceding material and the succeeding material. There is a need for an abnormality recognition and avoidance system.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention performs a remaining length calculation of a steel strip coil to be rewound from a payoff reel by a rotation detection sensor installed on a payoff reel and a PLG installed on an entrance bridle roll, and a predetermined steel strip. When performing the entrance side deceleration control of the steel strip coil based on the remaining length of the coil, an abnormality detection system in the steel strip coil processing line including a means for recognizing and notifying an abnormality caused by a malfunction of the rotation detection sensor is provided. provide.
[0007]
In addition, the abnormality caused by the malfunction of the rotation detection sensor is defined as L n , the feed amount of the steel strip by the bridle roll when the pay-off reel makes one rotation, and the feed amount of the steel strip by the bridle roll, one rotation before the pay-off reel. When L n−1 and the correction value are α,
L n-1 + α> L n
Is determined according to
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
A preferred embodiment of the present invention will be described in detail.
FIG. 1 shows an example of an entrance side deceleration control device of a steel strip coil processing line into which an abnormality detection system of the present invention is inserted.
The steel strip coil processing line into which the abnormality detection system of the present invention is inserted includes a steel strip coil 1, a payoff reel 2 for rewinding the steel strip coil, a bridle roll 3, a sensor 4 for detecting the rotation of the payoff reel, and a pulse value of the bridle roll. 5, an online thickness gauge 6 for measuring the thickness of the steel strip being passed, a remaining length calculation processing device 8 for calculating the remaining length of the steel strip coil inserted in the payoff reel, and a sensor abnormality. The system comprises a sensor abnormality alarm device 9 for recognizing and issuing an alarm, a device 10 for setting conditions such as a bridle roll diameter, and an entry side deceleration control device 11 for reducing the line speed on the entry side of the steel strip line.
[0009]
FIG. 2 shows an example of the control flow of the present invention.
In S0, when the welding of the previous coil and the current coil is completed in the case of the continuous processing line, the remaining length calculation processing of the steel strip coil is started when the winding on the tension reel is completed in the output side in the case of the batch line.
[0010]
In S1, the remaining length calculation processing device 8 receives the data from the rotation sensor 4 of the pay-off reel and the PLG 5 of the bridle roll at the start of the steel strip coil threading, and determines whether or not the sensors are operating normally. When an abnormality is recognized, an abnormality alarm is issued by the sensor abnormality alarm device 9 or a patrol light is turned on.
As a result, the operator can recognize the initial abnormality that has occurred in the sensors in the steel strip processing line, and can take appropriate measures before the start of threading, thus preventing the threading in the line entry side deceleration control failure state. can do.
[0011]
In S2, the remaining length arithmetic processing unit 8 receives the data from the payoff reel rotation sensor 4, the bridle roll PLG 5, the steel strip thickness measured by the online thickness gauge 6, and the bridle obtained from the external input. From the roll diameter, the remaining length value of the steel strip coil inserted into the payoff reel 2 is obtained for each rotation of the payoff reel.
For example, assuming that the outer diameter of the steel strip coil 1 inserted into the payoff reel 2 is D POR , the inner diameter of the coil is D 0 , and the thickness of the steel strip coil is h, the steel strip coil 1 inserted into the payoff reel 2 is Is obtained from the following equation (1).
D POR is calculated from the following equation (2).
L = (D POR 2 -D 0 2) / 4h × π ····· (1)
D POR = C 1BR / P BR × D BR (2)
Here, C 1BR the integrated value of PLG installed in bridle roll when the payoff reel rotates 1, P BR is the number of pulses per rotation of the bridle roll, the D BR represents the bridle roll diameter.
[0012]
In S3, the monitoring of the sensors is performed to determine the operation status of the sensors.
Here, the feed amount of the steel strip of the bridle roll 3 when the payoff reel 2 makes one rotation is L n , the feed amount of the steel strip of the bridle roll of one turn before the payoff reel is L n−1 , and the correction value is α. Is determined by the following equation (3).
L n-1 + α> L n (3)
As a result, when an abnormality of the sensors in the steel strip processing line is recognized, an abnormality alarm is issued or a patrol light is turned on.
Thereby, the operator can recognize the abnormality that has occurred in the sensors in the steel strip processing line, and can take an appropriate countermeasure. Therefore, it is possible to prevent the passing of the steel sheet in the line entry side deceleration control in a defective state.
[0013]
FIG. 3 schematically illustrates the above determination method.
Feed amount of bridle roll 3 with the rotation of the pay-off reel 2 is gradually increased, when the rotation detecting sensor 4 payoff reel detects one rotation of the payoff reel, the value as L n in the above equation (3) is substituted (B or a in FIG. 3).
At this time, since the outer circumference of the steel strip coil 1 inserted into the payoff reel becomes smaller as it is rewound, the feed amount of the bridle roll also becomes smaller.
That is, if the sensor is normal, the feed amount of the bridle roll at the time of one revolution of the payoff reel does not become larger than the feed amount of the bridle roll of the previous payoff reel.
Conversely, when the rotation detection sensor is malfunctioning, one rotation of the payoff reel cannot be detected, so that the feed amount of the bridle roll continues to increase with the rotation of the payoff reel (c in FIG. 3). .
In other words, since the feed amount of the bridle roll for one revolution of the payoff reel becomes larger than the previous time and the above equation (3) is not satisfied, it is determined that an abnormality has occurred.
[0014]
The reason why the correction value α is added to L n-1 is that, for example, when the thickness of the steel strip coil is as thin as 0.2 mm, there is no large difference between L n-1 and L n . This is because a slight detection error may be determined to be abnormal, and this detection error is allowed.
This makes it possible to prevent an erroneous determination due to a detection error even if the steel strip coil is thin, and to reliably recognize an abnormality of the sensors.
[0015]
If the operation of the sensors is determined to be normal in S3, it is determined in S4 whether the remaining length of the steel strip coil inserted into the current payoff reel is within a preset entry side deceleration control range. If it is within the entry side deceleration control range, a signal is sent to the entry side deceleration control device 11 to perform entry side deceleration control.
If it is out of the entry side deceleration range, the process from S2 onward, which is the remaining length calculation process of the steel strip coil, is repeated again.
[0016]
【The invention's effect】
As described above, according to the present invention, it is possible to reliably prevent the quality deterioration of the steel strip coil due to the high-speed exit from the payoff reel at the tail end of the steel strip coil and the line stop due to the unwelding of the preceding material and the following material. It is possible to avoid an abnormality of the entry side deceleration control system of the steel strip coil processing line.
[Brief description of the drawings]
FIG. 1 is an example of an inlet side deceleration control device for a steel strip coil processing line employing an abnormality detection system of the present invention. FIG. 2 is a control flow of the present invention. FIG. 3 is a schematic diagram illustrating an abnormality determining method of the present invention. [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel coil 2 Payoff reel 3 Bridle roll 4 Payoff reel rotation detection sensor 5 Bridle roll pulse transmitter (PLG)
6 Online thickness gauge 8 Remaining length calculation processing device 9 Sensor abnormality alarm device 10 Condition setting device 11 Inlet side deceleration control device

Claims (2)

ペイオフリールに設置された回転検出センサー及び入側ブライドルロールに設置されたパルス発信機によりペイオフリールより巻き戻される鋼帯コイルの残長演算を行い、所定の鋼帯コイルの残長値に基づいて鋼帯コイルの入側減速制御を行う際に、回転検出センサーの作動不良に起因する異常を認識し通知する手段を備えた鋼帯コイル処理ラインにおける異常検出システム。The remaining length calculation of the steel strip coil rewound from the payoff reel is performed by the rotation detection sensor installed on the payoff reel and the pulse transmitter installed on the entrance bridle roll, and based on the remaining length value of the predetermined steel strip coil. An abnormality detection system in a steel strip coil processing line, comprising: means for recognizing and notifying an abnormality caused by an operation failure of a rotation detection sensor when performing entrance side deceleration control of a steel strip coil. 請求項1に記載の回転検出センサーの作動不良に起因する異常を、ペイオフリールが1回転した際のブライドルロールによる鋼帯の送り量をL、ペイオフリールの前1回転のブライドルロールによる鋼帯の送り量をLn−1、補正値をαとするとき、次式
n−1+α>L
に従って判別することを特徴とする鋼帯コイル処理ラインにおける異常検出システム。
The abnormality caused by the malfunction of the rotation detection sensor according to claim 1, wherein the feed amount of the steel strip by the bridle roll when the payoff reel makes one rotation is L n , and the steel strip by the bridle roll of one rotation before the payoff reel. Where L n-1 and the correction value are α, the following equation L n-1 + α> L n
An abnormality detection system in a steel strip coil processing line, wherein the abnormality is determined according to the following.
JP2002357765A 2002-12-10 2002-12-10 Anomaly detection system in steel strip coil processing line Expired - Fee Related JP4293337B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012121061A (en) * 2010-12-10 2012-06-28 Jfe Steel Corp Method and device for controlling delivery of steel strip coil
CN102615143A (en) * 2012-03-15 2012-08-01 山西太钢不锈钢股份有限公司 Method for dynamically judging precision exception of winding drum of reeling machine
CN113020279A (en) * 2021-02-26 2021-06-25 首钢京唐钢铁联合有限责任公司 Uncoiling leveling control method, device and system of leveling unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012121061A (en) * 2010-12-10 2012-06-28 Jfe Steel Corp Method and device for controlling delivery of steel strip coil
CN102615143A (en) * 2012-03-15 2012-08-01 山西太钢不锈钢股份有限公司 Method for dynamically judging precision exception of winding drum of reeling machine
CN113020279A (en) * 2021-02-26 2021-06-25 首钢京唐钢铁联合有限责任公司 Uncoiling leveling control method, device and system of leveling unit

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