JP3624619B2 - Rolling method and rolling control device for reversible cold rolling mill - Google Patents

Rolling method and rolling control device for reversible cold rolling mill Download PDF

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JP3624619B2
JP3624619B2 JP06575197A JP6575197A JP3624619B2 JP 3624619 B2 JP3624619 B2 JP 3624619B2 JP 06575197 A JP06575197 A JP 06575197A JP 6575197 A JP6575197 A JP 6575197A JP 3624619 B2 JP3624619 B2 JP 3624619B2
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rolling
strip
rolling mill
entry
thickness
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JPH10263613A (en
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博明 桑野
誠寛 口
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石川島播磨重工業株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は可逆式冷間圧延機の通板、加速から定常圧延、さらに減速、尻抜けまでの圧延方法とその制御装置に関するものである。
【0002】
【従来の技術】
従来の可逆式圧延機1では、図3に示すように、予めストリップ15の先端を出側の巻き取りリール11に巻き付けてストリップ15に張力を負荷してから、圧延機1のロールギャップを所定の間隔に設定し、圧延を開始していた。
【0003】
【発明が解決しようとする課題】
そのため、図3に示すように、ストリップ15の先端のかなり長い部分(図のLの部分)がスクラップとなり、歩留まりを低下させていた。
同様に、圧延終了時に入り側リール10から尾端を抜かずに逆転させて圧延するため、尾端のLの長さの部分がオフゲージとなり、やはりスクラップとなっいた。
【0004】
本発明は上記従来の不具合を解消するために創案したもので、可逆式冷間圧延機で、従来のように歩留まりを低下させることなく圧延する方法、およびその制御装置を提供することを目的とするものである。
【0005】
【課題を解決するための手段】
本発明によれば、圧延機の入出側に板厚計、板速計を備え、入り側の巻き取りリールからストリップを巻き戻して圧延機に通し、ストリップ先端が圧延機出側の板速計に達したら、圧延機のロールギャップを所定の値に設定して圧延を開始し、そのままストリップ先端を圧延機出側の巻き取りリールに巻き付かせて圧延を続けるとともに、ストリップ尾端が圧延機の入り側リールを抜ける時に圧延機入り側でストリップの尾端を挟んで張力を負荷してストリップの蛇行を防止し、圧延終了時はストリップ尾端を圧延しながら圧延機を尻抜けさせ、出側の巻き取りリールに巻き付かせる圧延方法を基本に、同様の操作で複数パスの圧延を繰り返し、所定の板厚のストリップを生産し、このとき、入り側の厚み計と入出側の板速計の信号をもとに出側の板厚を演算し、得られた板厚信号を目標値と比較し、その偏差に基づきロールギャップを圧延中に時々刻々と制御する、可逆式冷間圧延機の圧延方法が提供される。
【0006】
また、本発明によれば、可逆式冷間圧延機であって、少なくとも圧延機の入出側に板厚計、板速計を備え、また、ロールギャップをサーボ弁と油圧シリンダで設定する油圧圧下装置を備えた油圧ミルであって、ストリップ先端が出側の板速計に達するタイミングを板速計の信号をもとに検出する演算装置と、該演算装置からの信号を受けてロールギャップを所定の間隔に設定する油圧圧下装置と、ストリップ尾端が圧延機の入り側リールを抜ける時に使用しストリップの蛇行を防止するように圧延機入り側でストリップの尾端を挟んで張力を負荷する機構とを備え、入り側の厚み計と入出側の板速計の信号をもとに出側の板厚を演算し、得られた板厚信号を目標値と比較し、その偏差を油圧圧下装置に送ってロールギャップを圧延中に時々刻々と制御することを特徴とする可逆式圧延機の圧延制御装置が提供される。
【0007】
上記方法及び装置によれば、ストリップ先端が圧延機出側の板速計に達したら、圧延機のロールギャップを所定の値に設定して圧延を開始し、そのままストリップ先端を圧延機出側の巻き取りリールに巻き付かせて圧延を続けるとともに、圧延終了時はストリップ尾端を圧延しながら圧延機を尻抜けさせるので、板厚が所定の値に入らずスクラップとなるのは、先後端のごく一部となり、従来よりもはるかに歩留まりが向上し、生産性を上げることができる。
【0008】
また、ストリップ尾端が圧延機の入り側リール抜ける時に使用しストリップの尾端を挟んで張力を負荷するので、後方張力の消失を防ぎストリップの蛇行を防止することができる。
【0009】
【発明の実施の形態】
以下、図面に基づいて、本発明の一実施形態を説明する。なお、各図において共通する部分には同一の符号を付し説明の重複を省略する。
図1に本発明の可逆式冷間圧延機の構成図を示す。図1で圧延機1の入出側には板速計2,3、厚み計4,5が設置されている。図1は、圧延されるストリップが紙面に向かって左から右へ進む場合のシステム構成を示している。板厚制御は、入出側の板速計2,3と入り側の板厚計4の信号をもとに、マスフロー式:h=H×V/vに基づいて出側板厚hを推定し、推定した出側板厚hを目標値13と比較演算器12で比較演算して偏差を求め、それを油圧圧下制御装置6に送り、サーボ弁7、油圧シリンダ8、変位計9より成る油圧圧下装置16で、上下ワークロール6間のロールギャップを制御することにより行う。
【0010】
14は演算器で、出側板速計の出力信号よりストリップ先端の通過を判断し、油圧圧下装置へ指令を送る働きをする。
【0011】
図2をもとに本発明の作動を説明する。図2は本発明の可逆式圧延機1における圧延の状態図を示した模式図で、ストリップの通板(図中、▲1▼、▲2▼、▲3▼)、加速・圧延・減速(▲4▼)、尻抜け(▲5▼)までを示している。図2▲1▼において、入り側リール10からストリップ15は巻き戻されて、圧延機1へ送り込まれる。これは、オペレータの手作業で行われる場合もあるし、通板装置を使って自動で行われる場合もある。17はガイド装置である。この状態では圧延機1のロールギャップは、通板に支障を来さないように開かれている。▲2▼に示すように、ストリップ15が圧延機を通過後、先端が出側の板速計3に到達した時点で演算器14は油圧圧下装置18(図1の油圧圧下制御装置6、油圧圧下装置16をまとめて図示)に指令を送り、ロールギャップが所定の値に設定される。とともに、マスフロー演算器12により時々刻々と圧延機出側板厚が計算され、先に述べたように、圧延機出側板厚の制御が行われる。すなわち、この状態では、圧延機1の前方張力が未だ確立していないが、前述の板厚制御により、ストリップ15は出側の所定の板厚に保たれる。
【0012】
さらに、ストリップ15は進んでいき、▲3▼に示すように出側のリールに巻き付く。ここで、初めて圧延機出側張力が確立し、圧延機1は加速される。加速、定常速度、減速とストリップ15は圧延され(▲4▼)、▲5▼に示すように通板速度で入り側リール10をストリップ15の尾端が抜け、圧延機入り側の板速計2、あるいは板厚計4を抜けるまで板厚制御は行われる。この状態では、圧延機の後方張力は零となっているが、前述の板厚制御で出側板厚は所定の値に保たれる。また、後方張力が消失するとストリップが蛇行しやすくなるので、必要があれば張力負荷装置19でストリップを挟んで一定張力を与える場合もある。
【0013】
リバースして逆方向に圧延される場合も、同じように板厚制御が行われる。
【0014】
【発明の効果】
以上のようにして、本発明の可逆式冷間圧延機1では、板厚が所定の値に入らずスクラップとなるのは、先後端のごく一部となり、従来よりもはるかに歩留まりが向上し、生産性が上がる。なお、本発明の可逆式冷間圧延機では、通板時、過渡的に前方張力が確立せず後方張力のみ確立している状態、前方、後方張力とも確立した状態、前方張力は確立しているが後方張力が確立していない状態が現れるが、理論検討および実験によると、張力の有無による荷重変動は5.6%程度であったので、上述の板厚制御で過渡状態に十分対応できることを筆者らは確認している。
【図面の簡単な説明】
【図1】本発明の可逆式圧延機の構成図である。
【図2】本発明の可逆式圧延機の作動説明図である。
【図3】従来の可逆式圧延機の作動である。
【符号の説明】
1 圧延機
2 板速計
3 板速計
4 板厚計
5 厚み計
6 油圧圧下制御装置
7 サーボ弁
8 油圧シリンダ
9 変位計
10 入り側リール
11 巻き取りリール
12 比較演算器
13 目標値
14 演算器
15 ストリップ
16 油圧圧下装置
17 ガイド装置
18 油圧圧下装置
19 張力負荷装置
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reversing cold rolling mill, a rolling method from acceleration to steady rolling, further deceleration and slipping, and a control device therefor.
[0002]
[Prior art]
In the conventional reversible rolling mill 1, as shown in FIG. 3, the tip of the strip 15 is wound around the take-up reel 11 in advance and a tension is applied to the strip 15, and then the roll gap of the rolling mill 1 is set to a predetermined value. Rolling was started and rolling was started.
[0003]
[Problems to be solved by the invention]
Therefore, as shown in FIG. 3, considerably longer portion of the tip of the strip 15 (L 1 portion in the figure) becomes scrap, which decreases the yield.
Similarly, for rolling by reversing without pulling the tail from the inlet side reel 10 at the end of rolling, the length of the portion of the L 2 of the tail becomes off-gage, also scrap and Na'ita.
[0004]
The present invention was devised in order to solve the above-mentioned conventional problems, and an object thereof is to provide a reversible cold rolling mill that performs rolling without reducing yield as in the prior art, and a control device therefor. To do.
[0005]
[Means for Solving the Problems]
According to the present invention, a plate thickness meter and a plate speed meter are provided on the entry / exit side of the rolling mill, the strip is rewound from the take-up take-up reel and passed through the rolling mill, and the strip tip is on the delivery side of the rolling mill. , The rolling gap of the rolling mill is set to a predetermined value, and rolling is started. The rolling process is continued with the end of the strip wound around the take-up reel on the delivery side of the rolling mill, and the strip tail end is at the rolling mill. When the reel enters the reel, the tension is applied to the end of the strip on the entry side of the rolling mill to prevent the meandering of the strip, and at the end of rolling, the strip is pulled out while rolling the tail end of the strip. Based on the rolling method of winding on the take-up reel on the side, multiple passes of rolling are repeated in the same manner to produce a strip with a predetermined thickness. At this time, the thickness gauge on the entry side and the plate speed on the entry / exit side Based on the total signal Calculating the thickness of the side, to compare the obtained sheet thickness signal with a target value, and controls every moment during rolling the roll gap based on the deviation, the rolling method of the reversible cold rolling mill is provided .
[0006]
Further, according to the present invention, the reversible cold rolling mill is provided with a plate thickness meter and a plate speed meter at least on the entry / exit side of the rolling mill, and a hydraulic reduction in which a roll gap is set by a servo valve and a hydraulic cylinder. A hydraulic mill equipped with an apparatus for detecting the timing at which the end of the strip reaches the outlet plate speed meter based on the signal from the plate speed meter, and receiving the signal from the calculation device, the roll gap A hydraulic reduction device set at a predetermined interval and a tension is applied across the tail end of the strip on the entrance side of the rolling mill to prevent the strip from meandering when the strip tail end passes through the entrance reel of the rolling mill. A mechanism to calculate the thickness of the outlet side based on the signals of the thickness gauge on the inlet side and the speedometer on the inlet / outlet side, compare the obtained thickness signal with the target value, and reduce the deviation hydraulically Sent to the machine and the roll gap is Rolling control apparatus for a reversible rolling mill and controlling the is provided.
[0007]
According to the above method and apparatus, when the leading end of the strip reaches the plate speed meter on the delivery side of the rolling mill, the roll gap of the rolling mill is set to a predetermined value to start rolling, and the leading end of the strip is directly moved to the exit side of the rolling mill. Rolling around the take-up reel and continuing rolling, and at the end of rolling, the rolling mill is pulled out while rolling the tail end of the strip. It becomes a small part, and the yield is much improved compared to the conventional one, and the productivity can be increased.
[0008]
Further, since the strip tail end is loaded with a tension across the tail end of the strip is used when exiting inlet side reel of the rolling mill, it is possible to prevent meandering of the strip to prevent loss of the backward tension.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and duplication of description is abbreviate | omitted.
FIG. 1 shows a configuration diagram of a reversible cold rolling mill according to the present invention. In FIG. 1, plate speed meters 2 and 3 and thickness meters 4 and 5 are installed on the entrance / exit side of the rolling mill 1. FIG. 1 shows a system configuration in the case where a strip to be rolled proceeds from left to right toward the paper surface. The plate thickness control is based on the mass flow equation: h = H × V / v based on the signals of the plate speed meters 2 and 3 on the entry / exit side and the plate thickness meter 4 on the entry side, The estimated outlet side thickness h is compared with the target value 13 by the comparison calculator 12 to obtain a deviation, which is sent to the hydraulic pressure reduction control device 6, and the hydraulic pressure reduction device comprising the servo valve 7, the hydraulic cylinder 8, and the displacement meter 9. 16, by controlling the roll gap between the upper and lower work rolls 6.
[0010]
Reference numeral 14 denotes a computing unit that determines the passage of the strip tip from the output signal of the delivery side plate speed meter and sends a command to the hydraulic pressure reducing device.
[0011]
The operation of the present invention will be described with reference to FIG. FIG. 2 is a schematic diagram showing a state diagram of rolling in the reversible rolling mill 1 of the present invention, in which strip strips ((1), (2), (3) in the figure), acceleration / rolling / deceleration ( (4)), up to bottom (5) is shown. In FIG. 2 (1), the strip 15 is rewound from the entry-side reel 10 and fed into the rolling mill 1. This may be done manually by the operator or automatically using a threading device. Reference numeral 17 denotes a guide device. In this state, the roll gap of the rolling mill 1 is opened so as not to hinder the sheet passing. As shown in (2), when the strip 15 passes through the rolling mill and the tip reaches the plate speed meter 3 on the outlet side, the calculator 14 is operated by the hydraulic pressure reduction device 18 (the hydraulic pressure reduction control device 6 in FIG. A command is sent to the reduction device 16 (shown collectively), and the roll gap is set to a predetermined value. At the same time, the rolling mill outlet side plate thickness is calculated momentarily by the mass flow calculator 12, and the rolling mill outlet side plate thickness is controlled as described above. That is, in this state, the front tension of the rolling mill 1 has not been established yet, but the strip 15 is maintained at a predetermined thickness on the outlet side by the above-described thickness control.
[0012]
Further, the strip 15 advances and winds around the outgoing reel as indicated by (3). Here, the rolling mill exit tension is established for the first time, and the rolling mill 1 is accelerated. Acceleration, steady speed, deceleration and strip 15 are rolled (4), and as shown in (5), the entry reel 10 is pulled out at the tail end of the strip 15 at the sheet passing speed, and the plate speed meter on the entry side of the rolling mill. Thickness control is performed until 2 or the thickness gauge 4 is passed. In this state, the rear tension of the rolling mill is zero, but the outlet side plate thickness is maintained at a predetermined value by the above-described plate thickness control. Further, since the strip is likely to meander when the rear tension is lost, there is a case where a constant tension is applied across the strip by the tension load device 19 if necessary.
[0013]
In the case of reverse and rolling in the reverse direction, the plate thickness control is performed in the same manner.
[0014]
【The invention's effect】
As described above, in the reversible cold rolling mill 1 of the present invention, the sheet thickness does not fall within a predetermined value and scrap is a small part of the front and rear ends, and the yield is improved much more than before. , Increase productivity. In the reversible cold rolling mill of the present invention, when passing through, the forward tension is not established transiently, only the rear tension is established, the front and rear tensions are both established, and the front tension is established. Although there is a state where the rear tension is not established, the load fluctuation due to the presence or absence of the tension is about 5.6% according to the theoretical examination and experiment, so the above-mentioned plate thickness control can sufficiently cope with the transient state. The authors have confirmed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a reversible rolling mill according to the present invention.
FIG. 2 is an operation explanatory diagram of the reversible rolling mill of the present invention.
FIG. 3 shows the operation of a conventional reversible rolling mill.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling machine 2 Plate speed meter 3 Plate speed meter 4 Plate thickness meter 5 Thickness meter 6 Hydraulic pressure reduction control device 7 Servo valve 8 Hydraulic cylinder 9 Displacement meter 10 Incoming reel 11 Take-up reel 12 Comparator 13 Target value 14 Calculator 15 Strip 16 Hydraulic reduction device 17 Guide device 18 Hydraulic reduction device 19 Tension load device

Claims (2)

圧延機の入出側に板厚計、板速計を備え、入り側の巻き取りリールからストリップを巻き戻して圧延機に通し、ストリップ先端が圧延機出側の板速計に達したら、圧延機のロールギャップを所定の値に設定して圧延を開始し、そのままストリップ先端を圧延機出側の巻き取りリールに巻き付かせて圧延を続けるとともに、ストリップ尾端が圧延機の入り側リールを抜ける時に圧延機入り側でストリップの尾端を挟んで張力を負荷してストリップの蛇行を防止し、圧延終了時はストリップ尾端を圧延しながら圧延機を尻抜けさせ、出側の巻き取りリールに巻き付かせる圧延方法を基本に、同様の操作で複数パスの圧延を繰り返し、所定の板厚のストリップを生産し、このとき、入り側の厚み計と入出側の板速計の信号をもとに出側の板厚を演算し、得られた板厚信号を目標値と比較し、その偏差に基づきロールギャップを圧延中に時々刻々と制御する、可逆式冷間圧延機の圧延方法。A sheet thickness meter and a plate speed meter are provided on the entry / exit side of the rolling mill, and the strip is rewound from the take-up reel on the entry side and passed through the rolling mill. Rolling is started with the roll gap set to a predetermined value, and the strip end is wound around the take-up reel on the exit side of the rolling mill and the rolling is continued, and the tail end of the strip exits the entry reel of the rolling mill. Occasionally tension is applied across the tail end of the strip at the entrance to the rolling mill to prevent meandering of the strip, and at the end of rolling, the rolling mill is pulled out while rolling the tail end of the strip to the take-up reel on the exit side. Based on the rolling method of winding, the rolling of multiple passes is repeated by the same operation to produce a strip with a predetermined thickness. At this time, based on the signals of the input side thickness gauge and the input / output side speedometer Calculate the thickness of the outlet side , Resulting thickness signal is compared with the target value, and controls every moment during rolling the roll gap based on the deviation, the rolling method of the reversible cold rolling mill. 可逆式冷間圧延機であって、少なくとも圧延機の入出側に板厚計、板速計を備え、また、ロールギャップをサーボ弁と油圧シリンダで設定する油圧圧下装置を備えた油圧ミルであって、ストリップ先端が出側の板速計に達するタイミングを板速計の信号をもとに検出する演算装置と、該演算装置からの信号を受けてロールギャップを所定の間隔に設定する油圧圧下装置と、ストリップ尾端が圧延機の入り側リールを抜ける時に使用しストリップの蛇行を防止するように圧延機入り側でストリップの尾端を挟んで張力を負荷する機構とを備え、入り側の厚み計と入出側の板速計の信号をもとに出側の板厚を演算し、得られた板厚信号を目標値と比較し、その偏差を油圧圧下装置に送ってロールギャップを圧延中に時々刻々と制御することを特徴とする可逆式圧延機の圧延制御装置。This is a reversible cold rolling mill, which is equipped with a plate thickness meter and a plate speed meter at least on the entry / exit side of the rolling mill, and a hydraulic mill equipped with a hydraulic reduction device that sets a roll gap with a servo valve and a hydraulic cylinder. An arithmetic unit that detects the timing at which the leading end of the strip reaches the outlet plate speedometer based on a signal from the plate speedometer, and a hydraulic pressure reduction that sets the roll gap to a predetermined interval in response to the signal from the calculation device. And a mechanism for applying a tension across the tail end of the strip on the entry side of the rolling mill so that the strip tail end is used when the strip tail end passes through the entry reel of the rolling mill and prevents the meandering of the strip . Based on the signals from the thickness gauge and the plate speed meter on the entry / exit side, the sheet thickness on the delivery side is calculated, the obtained sheet thickness signal is compared with the target value, and the deviation is sent to the hydraulic reduction device to roll the roll gap. Characterized by the momentary control inside Rolling control apparatus for a reversible rolling mill for.
JP06575197A 1997-03-19 1997-03-19 Rolling method and rolling control device for reversible cold rolling mill Expired - Fee Related JP3624619B2 (en)

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JP06575197A JP3624619B2 (en) 1997-03-19 1997-03-19 Rolling method and rolling control device for reversible cold rolling mill

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JP06575197A JP3624619B2 (en) 1997-03-19 1997-03-19 Rolling method and rolling control device for reversible cold rolling mill

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JPH10263613A JPH10263613A (en) 1998-10-06
JP3624619B2 true JP3624619B2 (en) 2005-03-02

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CN104259222B (en) * 2014-10-22 2016-04-13 山东钢铁股份有限公司 A kind of reversing cold mill stable rolling method of operating
CN108393356A (en) * 2018-04-20 2018-08-14 天津重电气自动化有限公司 A kind of electric-control system applied to hot continuous rolling Coil Box and flying shear
CN112969540B (en) * 2018-11-23 2023-11-03 考克利尔维修工程有限责任公司 Flexible cold rolling mill and conversion method thereof
CN110976517B (en) * 2019-11-29 2021-02-19 山西太钢不锈钢股份有限公司 Automatic control method for hot continuous rolling strip steel rolling line tracking

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