JP3485083B2 - Cold rolling equipment and cold rolling method - Google Patents
Cold rolling equipment and cold rolling methodInfo
- Publication number
- JP3485083B2 JP3485083B2 JP2000324193A JP2000324193A JP3485083B2 JP 3485083 B2 JP3485083 B2 JP 3485083B2 JP 2000324193 A JP2000324193 A JP 2000324193A JP 2000324193 A JP2000324193 A JP 2000324193A JP 3485083 B2 JP3485083 B2 JP 3485083B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- strip
- crown
- plate
- rolling
- 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.)
- Expired - Lifetime
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- Control Of Metal Rolling (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、安価な設備であっ
ても鋼帯のエッジドロップが少なく所定の板厚分布を有
する製品を製造できる冷間圧延設備、およびそれを用い
た鋼帯の冷間圧延方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold rolling facility capable of producing a product having a predetermined strip thickness distribution with little edge drop of the steel strip even with an inexpensive facility, and a steel strip cooling using the same. Hot rolling method.
【０００２】[0002]
【従来の技術】近年、各方面において、鋼製品寸法の高
精度化、あるいは鋼製品の製造工程における歩留改善を
目的とした各種の開発あるいは改良が行われている。冷
間圧延の分野においても、板幅方向についての板厚精度
の向上を目的としたプロフィル制御技術が積極的に開発
されている。2. Description of the Related Art In recent years, various developments and improvements have been made in various fields for the purpose of improving the precision of steel product dimensions or improving the yield in the manufacturing process of steel products. Also in the field of cold rolling, profile control technology has been actively developed for the purpose of improving the strip thickness accuracy in the strip width direction.
【０００３】特開平１１−２４４９２０号公報には、圧
延材の全体プロフィルを制御しやすい上流スタンドにお
いて中央板厚を正確に制御し、下流での圧延を予測して
上流側スタンド出側の圧延材プロフィルを形成する技術
が開示されている。本技術によれば、中間スタンドでの
エッジドロップ量を適当に調整することができ、最終ス
タンドでの圧延材の伸び分布を適正に制御することがで
きるとしている。In Japanese Patent Laid-Open No. 11-244920, the rolled material on the delivery side of the upstream stand is predicted by accurately controlling the central plate thickness in the upstream stand, which makes it easy to control the overall profile of the rolled material, and predicting rolling on the downstream side. Techniques for forming a profile are disclosed. According to the present technology, the edge drop amount at the intermediate stand can be appropriately adjusted, and the elongation distribution of the rolled material at the final stand can be appropriately controlled.
【０００４】さらに、互いの制御装置の影響を予測しな
がら協調して板厚制御することにより、良好なプロフィ
ル制御が可能とされている。特開平１０−５８３７号公
報には、圧延設備に供給される素材の板厚の板幅方向の
分布に基づいて各冷間圧延機出側における所望の板形状
を実現するためのメカニカル板クラウンの目標値を求
め、各冷間圧延機のロールプロフィルの測定値および圧
延荷重測定値に基づいて形状制御を行う技術が開示され
ている。本技術では、冷間圧延機の入側に鋼帯の幅方向
に板厚分布を測定できる板プロフィル測定装置を設置
し、全スタンド間には板厚測定装置を設置した例が示さ
れている。Further, by controlling the plate thickness in cooperation with each other while predicting the influence of the control devices of each other, good profile control is possible. Japanese Patent Application Laid-Open No. 10-5837 discloses a mechanical plate crown for realizing a desired plate shape on the delivery side of each cold rolling mill based on the distribution of the plate thickness of the material supplied to the rolling equipment in the plate width direction. A technique is disclosed in which a target value is obtained and shape control is performed based on a roll profile measurement value and a rolling load measurement value of each cold rolling mill. The present technology shows an example in which a plate profile measuring device capable of measuring the plate thickness distribution in the width direction of the steel strip is installed on the inlet side of the cold rolling mill, and a plate thickness measuring device is installed between all stands. .
【０００５】特開平２−３７９０８号公報には、圧延機
入側に設置した板クラウン検出器により検出した板クラ
ウン等に基づき、ワークロールベンディング力を出力す
るタイミングを求め、このタイミングに合わせて制御す
る方法が開示されている。本技術によれば、フィードフ
ォワード制御が可能になり、高精度の板クラウン制御が
可能とされている。In Japanese Patent Laid-Open No. 2-37908, a timing for outputting a work roll bending force is determined based on a plate crown detected by a plate crown detector installed on the rolling mill entrance side, and control is performed in accordance with this timing. A method of doing so is disclosed. According to the present technology, feedforward control is possible and highly accurate plate crown control is possible.
【０００６】[0006]
【発明が解決しようとする課題】しかし、何れの公報に
開示された技術も圧延機の直前に板プロフィル測定装置
を必要とし、板厚分布または板クラウンを測定しようと
すれば、鋼帯の全幅にわたり板厚を測定できるか、また
は、少なくとも中央部および片方の板端部の板厚を測定
できる連続式板プロフィル測定装置を設置する必要があ
る。あるいは、鋼帯の送りを一旦停止し、板プロフィル
測定装置を鋼帯幅方向に移動させて、幅方向の板厚分布
を測定するなどの方法が挙げられる。しかし、鋼帯の中
央と板端部の板厚を連続的に測定する板プロフィル測定
装置は高価であり、また、圧延機の上流側で鋼帯の送り
を一旦停止させる方法の場合には、製品の板厚が寸法公
差以内に収まらず、歩留りの悪化をもたらすといった問
題がある。However, the techniques disclosed in any of the publications require a plate profile measuring device immediately before the rolling mill, and if the plate thickness distribution or the plate crown is to be measured, the entire width of the steel strip is required. It is necessary to install a continuous plate profile measuring device capable of measuring the plate thickness over the entire length, or at least measuring the plate thickness of the central portion and one of the plate end portions. Alternatively, a method of temporarily stopping the feeding of the steel strip, moving the plate profile measuring device in the width direction of the steel strip, and measuring the strip thickness distribution in the width direction may be mentioned. However, the plate profile measuring device that continuously measures the plate thickness of the center and the plate edge of the steel strip is expensive, and in the case of the method of temporarily stopping the feeding of the steel strip on the upstream side of the rolling mill, There is a problem that the plate thickness of the product does not fall within the dimensional tolerance, resulting in deterioration of yield.
【０００７】また、板厚精度の高い製品を製造するため
には、鋼帯のウェッジの影響を無視することはできない
が、いずれの公報に開示された技術も母材のウェッジへ
の対応については配慮されていない。ウェッジを測定し
制御するためには、鋼帯幅方向の両板端部の板厚を測定
できる装置および、同装置による測定値に基づき圧延ロ
ールの両板端部における圧下量を合致させるべく制御手
段を作動させることが必要である。しかし、前記の板プ
ロフィル測定装置と同様の考え方で、両板端部の板厚を
連続的に測定できるプロフィル測定装置を必要とし、板
厚分布の測定と合わせ、少なくとも３点の測定が必要で
あり、設備費用の問題は一層大きい。Further, in order to manufacture a product having a high plate thickness accuracy, the influence of the wedge of the steel strip cannot be ignored, but the techniques disclosed in any of the publications are applicable to the wedge of the base material. Not considered. In order to measure and control the wedge, a device that can measure the plate thickness at both ends of the steel strip in the width direction of the steel strip, and control to match the reduction amount at both ends of the rolling roll based on the measurement value by the device It is necessary to activate the means. However, in the same way as the above-mentioned plate profile measuring device, a profile measuring device capable of continuously measuring the plate thickness of both plate edges is required, and at least three points of measurement are required together with the measurement of the plate thickness distribution. Yes, the problem of equipment costs is even greater.
【０００８】ここで、板クラウンとは、板中央部と板端
部（片方の板端部または両板端部の平均値）との板厚差
をいう。また、ウェッジとは、鋼板の両板端部から一定
距離以内における板厚差をいい、通常は、板の両端部か
ら２５ｍｍ程度の位置での板厚差をいう場合が多い。ウ
ェッジは、ロールの左右の圧下量の差異により発生した
り、ロールの磨耗によってロールの左右の間隙に差異が
生じて発生する場合がある。冷間圧延においては、左右
の圧下量の差異に加えて、母材にウェッジが存在する
と、これが冷間圧延後の製品に残存し、高い板厚精度の
要求される製品では特に品質上の問題となる。
本発明は、上記の従来技術における問題点
を解決するためになされたものであり、板プロフィル測
定装置を適正な位置に設置することにより、安価な設備
であっても、エッジドロップが少なく所定の板厚分布を
有する製品を製造できる冷間圧延設備を提供するととも
に、それを用いた鋼帯の適正な冷間圧延方法の提供を目
的とする。Here, the plate crown means a plate thickness difference between a plate central portion and a plate end portion (one plate end portion or an average value of both plate end portions). Further, the wedge means a difference in plate thickness within a certain distance from both end portions of the steel plate, and usually means a difference in plate thickness at a position of about 25 mm from both end portions of the plate. The wedge may be generated due to a difference between the left and right rolling amounts of the roll or a difference between the left and right gaps of the roll due to abrasion of the roll. In cold rolling, in addition to the difference in the amount of reduction on the left and right, if there is a wedge in the base material, this remains in the product after cold rolling, which is a quality problem especially for products requiring high strip thickness accuracy. Becomes
The present invention has been made to solve the problems in the above-mentioned conventional techniques, and by installing the plate profile measuring device at an appropriate position, even with inexpensive equipment, there are few edge drops and a predetermined amount. It is an object of the present invention to provide a cold rolling facility capable of manufacturing a product having a plate thickness distribution and an appropriate cold rolling method for a steel strip using the cold rolling facility.
【０００９】[0009]
【課題を解決するための手段】本発明の要旨は、下記
(1)〜(3)の冷間圧延設備ならびに(4)〜(6)に記載の鋼帯
の冷間圧延方法にある。The summary of the present invention is as follows.
The cold rolling equipment according to (1) to (3) and the cold rolling method for a steel strip according to (4) to (6).
【００１０】(1) 鋼帯の搬出リール、鋼帯を接続する溶
接機、鋼帯を貯蔵するルーパーおよび連続式冷間圧延機
を順次配設した冷間圧延設備において、前記搬出リール
と前記ルーパーとの間に設けられた、鋼帯の幅方向の板
厚分布を測定する板プロフィル測定装置と、前記板プロ
フィル測定装置による測定値に基づき板のクラウン値を
算出するクラウン変換装置と、前記のクラウン変換装置
からの出力に基づき、前記圧延機のロールクロス角度、
ロールシフト量、ロールベンダー量およびロールクラウ
ン量のうちの１つ以上を制御する制御出力の演算装置と
を有する冷間圧延設備。(1) In a cold rolling facility in which a steel strip unloading reel, a welding machine for connecting steel strips, a looper for storing steel strips, and a continuous cold rolling mill are sequentially arranged, the unloading reel and the looper are provided. Provided between and, a plate profile measuring device for measuring the plate thickness distribution in the width direction of the steel strip, and a crown conversion device for calculating the crown value of the plate based on the measurement value by the plate profile measuring device, and Based on the output from the crown converter, the roll cross angle of the rolling mill,
A cold rolling facility having a control output arithmetic unit for controlling one or more of a roll shift amount, a roll bender amount, and a roll crown amount.
【００１１】(2) 鋼帯の幅方向の板厚分布を測定する板
プロフィル測定装置が、鋼帯を接続する溶接機と鋼帯を
貯蔵するルーパーとの間に設けられてなる前記(1)に記
載の冷間圧延設備。
(3) 鋼帯の幅方向の板厚分布を測定する板プロフィル測
定装置が、鋼帯搬出リールと鋼帯を接続する溶接機との
間に設けられてなる前記(1)に記載の冷間圧延設備。(2) A plate profile measuring device for measuring a plate thickness distribution in the width direction of a steel strip is provided between a welding machine for connecting the steel strips and a looper for storing the steel strips. Cold rolling equipment described in. (3) The plate profile measuring device for measuring the plate thickness distribution in the width direction of the steel strip, the cold as set forth in (1), which is provided between the steel strip unloading reel and the welding machine connecting the steel strips. Rolling equipment.
【００１２】(4) 前記(1)、(2)または(3)に記載の冷間
圧延設備を用い、鋼帯の送りを停止した状態で、鋼帯の
幅方向の板厚分布を測定する板プロフィル測定装置によ
り、鋼帯の幅方向の板厚分布を測定する鋼帯の冷間圧延
方法。(4) Using the cold rolling equipment described in (1), (2) or (3) above, measure the strip thickness distribution in the width direction of the steel strip with the feeding of the steel strip stopped. A steel strip cold rolling method for measuring the strip thickness distribution of a steel strip with a strip profile measuring device.
【００１３】(5) 鋼帯の幅方向の板厚分布の測定に加え
て、さらに、鋼帯の板クラウンを連続して測定し、セッ
トアップ時には定常圧延時の制御手段よりもクラウン制
御範囲の大きい制御手段を用い、定常圧延時にはセット
アップ時の制御手段よりもクラウン制御範囲の小さい制
御手段を用いる前記(4)に記載の鋼帯の冷間圧延方法。(5) In addition to the measurement of the strip thickness distribution in the width direction of the steel strip, the strip crown of the strip is continuously measured, and the crown control range is larger during setup than the control means during steady rolling. The cold rolling method for a steel strip according to (4) above, wherein the control means is used, and during steady rolling, a control means having a smaller crown control range than the control means at the time of setup is used.
【００１４】(6) 鋼帯の幅方向の板厚分布の測定に加え
て、さらに、鋼帯の板クラウンを連続して測定し、セッ
トアップ時には定常圧延時の制御手段よりもクラウン制
御の応答速度の速い制御手段を用い、定常圧延時にはセ
ットアップ時の制御手段よりもクラウン制御の応答速度
の遅い制御手段を用いる前記(4)に記載の鋼帯の冷間圧
延方法。(6) In addition to the measurement of the strip thickness distribution in the width direction of the steel strip, the strip crown of the strip is continuously measured, and at the time of setup, the response speed of crown control is higher than that of the control means during steady rolling. The method of cold rolling of a steel strip according to (4) above, wherein the control means having a faster response speed of crown control is used during steady rolling than the control means at the time of setup during steady rolling.
【００１５】なお、前記(1) のロールクラウン量とは、
油圧などの手段によりロール自身のクラウンを変更でき
る機能を有するロールのクラウン量をいう。The amount of roll crown in (1) above is
The crown amount of a roll having the function of changing the crown of the roll itself by means such as hydraulic pressure.
【００１６】本発明は、圧延機の入側に鋼帯を接続する
ための溶接機を有する圧延設備の特性および板プロフィ
ル測定装置の設置位置に着目してなされたものである。
板プロフィル測定装置を適正位置に設けることによっ
て、ラインを停止した状態でしかも製品の板厚変動を生
じることなく、板クラウンを測定し、それに基づいて制
御手段を制御し、エッジドロップが少なく所定の板厚分
布を有する製品を製造する。そのためには、既存の連続
型冷間圧延機に対して板プロフィル測定装置を安価な費
用で設置できる箇所に、目的に応じて入側の板プロフィ
ル測定装置を設置し、板クラウンを測定する必要があ
る。The present invention was made by paying attention to the characteristics of rolling equipment having a welding machine for connecting a steel strip to the entrance side of the rolling mill and the installation position of the plate profile measuring device.
By installing the plate profile measuring device at an appropriate position, the plate crown is measured while the line is stopped and the plate thickness of the product does not change, and the control means is controlled based on the measured crown, and the edge drop is reduced to a predetermined value. A product having a plate thickness distribution is manufactured. For that purpose, it is necessary to install the strip profile measuring device on the entry side according to the purpose and measure the strip crown at a place where the strip profile measuring device can be installed at a low cost with respect to the existing continuous cold rolling mill. There is.
【００１７】本発明者らは、下記の事実を突き止め、本
発明を完成した。The present inventors have found the following facts and completed the present invention.
【００１８】(a) 上記の要求を満足するためには、板プ
ロフィル測定装置を搬出リールとルーパーとの間に設置
するのが最適である。(A) In order to satisfy the above requirements, it is optimal to install the plate profile measuring device between the carry-out reel and the looper.
【００１９】(b) 板プロフィル測定装置を最適位置に設
置した上で、鋼板プロフィルを詳細に調査した結果、母
材の板クラウンは、鋼帯毎には大きく異なる場合がある
が、鋼帯内においては、比較的狭い範囲で緩やかに変化
する。(B) After the plate profile measuring device was installed at the optimum position, the steel plate profile was examined in detail. As a result, the plate crown of the base material may vary greatly from steel strip to steel strip. In, it changes slowly in a relatively narrow range.
【００２０】ここで、鋼帯とは、冷間圧延用母材とくに
熱延鋼板をいう。また、鋼帯毎とは、冷間圧延用母材の
１コイル毎をいい、鋼帯内とは、１コイル内をいう。Here, the steel strip refers to a base material for cold rolling, especially a hot rolled steel sheet. Further, "each steel strip" means "one coil" of the base material for cold rolling, and "inside steel strip" means one coil.
【００２１】(c) セットアップ時における製品の板クラ
ウンの制御には、制御範囲の比較的大きい制御手段を用
い、定常圧延中における板クラウンの制御には、制御範
囲の比較的小さい制御手段を用いることによって、過剰
な設備投資をともなわずに、充分にエッジドロップが少
なく所定の板厚分布を有する鋼帯を製造できる。(C) A control means with a relatively large control range is used for controlling the plate crown of the product during setup, and a control means with a relatively small control range is used for controlling the plate crown during steady rolling. As a result, a steel strip having a sufficiently small edge drop and a predetermined strip thickness distribution can be manufactured without excessive capital investment.
【００２２】(d) 母材の板クラウンの変化は、鋼帯内で
は充分になだらかであり、応答性の比較的速い制御手段
をセットアップ時に、また、応答性の遅い制御手段を定
常圧延時に用いることによって、鋼帯の先端および後端
において、オフゲージが少なく充分にエッジドロップの
少ない所定の板厚分布を有する鋼帯を製造できる。(D) The change of the plate crown of the base metal is sufficiently gentle in the steel strip, and a control means having a relatively fast response is used at the time of setup, and a control means having a slow response is used at the time of steady rolling. As a result, it is possible to manufacture a steel strip having a predetermined plate thickness distribution with a small off gauge and a sufficiently small edge drop at the front and rear ends of the steel strip.
【００２３】[0023]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
【００２４】図１は、本発明の第１の実施例である、溶
接機とルーパーの間に板プロフィル測定装置を有する圧
延設備の概要図である。圧延機５の入側に鋼帯を接続す
るための溶接機２、鋼帯を貯蔵することのできるルーパ
ー３を備え、ルーパーと溶接機との間に、鋼帯幅方向の
板厚分布を測定する板プロフィル測定装置７を備えた冷
間圧延設備を示している。FIG. 1 is a schematic diagram of a rolling equipment having a plate profile measuring device between a welding machine and a looper, which is a first embodiment of the present invention. A welding machine 2 for connecting steel strips to the entrance of the rolling mill 5 and a looper 3 capable of storing the steel strips are provided, and the strip thickness distribution in the width direction of the steel strip is measured between the looper and the welding machine. The cold rolling installation provided with the plate profile measuring device 7 which does is shown.
【００２５】鋼帯搬出リール６から搬出された鋼帯１は
溶接機２で溶接された後、ルーパー３に供給される。ル
ーパー３の速度を規制することによって、圧延中におい
てルーパー３よりも上流側の鋼帯１のルーパー３への送
り込みを減速または停止することができるので、鋼帯送
り込みの停止期間中に、板プロフィル測定装置７により
板幅方向の板厚分布を測定する。The steel strip 1 delivered from the steel strip delivery reel 6 is welded by the welding machine 2 and then supplied to the looper 3. By controlling the speed of the looper 3, it is possible to slow down or stop the feeding of the steel strip 1 on the upstream side of the looper 3 to the looper 3 during rolling. The plate thickness distribution in the plate width direction is measured by the measuring device 7.
【００２６】なお、板プロフィル測定装置は、鋼帯の幅
方向に測定装置を走行させて、鋼帯１の板幅方向で複数
箇所の板厚を測定する方式、あるいは、板幅方向の１箇
所を測定する測定装置を板幅方向に複数箇所設置する方
式のいずれであってもよい。また、測定用ローラー等を
鋼帯に接触させて測定する接触方式、あるいは、放射線
等を使用して測定する非接触方式のいずれであってもよ
い。前記板厚分布の測定値はクラウン変換装置８に送ら
れ、鋼帯両端近傍の板厚測定値の幅方向の差に基づき、
ウエッジが検出される。また、板プロフィル測定装置７
の幅方向の走行時に板幅方向全体の板厚の分布が測定さ
れ、板中央部と板端部との板厚の差（中央部と片端部と
の板厚差または中央部板厚と両端部板厚平均値との差）
により、板クラウンが算出される。このように、鋼帯幅
方向の板厚を測定できる板プロフィル測定装置７を連続
圧延機のルーパー３よりも上流側に設置することによ
り、鋼帯のウエッジおよび板クラウンの両方を精度良く
測定することができる。The plate profile measuring device is a system in which the measuring device is run in the width direction of the steel strip to measure the plate thickness of the steel strip 1 at a plurality of positions in the plate width direction, or at one position in the plate width direction. Any method may be used in which a measuring device for measuring is measured at a plurality of positions in the plate width direction. Further, either a contact method in which a measuring roller or the like is brought into contact with the steel strip for measurement, or a non-contact method in which measurement is performed using radiation or the like may be used. The measured value of the plate thickness distribution is sent to the crown converter 8, and based on the difference in the plate width measured value in the width direction near both ends of the steel strip,
A wedge is detected. In addition, the plate profile measuring device 7
During running in the width direction, the distribution of the plate thickness in the entire plate width direction is measured, and the difference in the plate thickness between the center part and the end part (the difference between the center part and one end part or the center part plate thickness and both ends) (Difference from the average value of part thickness)
Thus, the plate crown is calculated. As described above, by installing the plate profile measuring device 7 capable of measuring the plate thickness in the width direction of the steel strip on the upstream side of the looper 3 of the continuous rolling mill, both the wedge and the strip crown of the steel strip can be accurately measured. be able to.
【００２７】さらに、板プロフィル測定装置７をルーパ
ー３と溶接機２との間に備えることにより、鋼帯１が圧
延機５に到達するまでの時間が十分に取れるため、圧延
条件のセットアップ時に前記により測定された板クラウ
ン値を反映させることが可能である。Further, by providing the plate profile measuring device 7 between the looper 3 and the welding machine 2, it is possible to obtain a sufficient time for the steel strip 1 to reach the rolling machine 5, so that the above-mentioned method is required when the rolling conditions are set up. It is possible to reflect the plate crown value measured by.
【００２８】図２は、本発明の第２の実施例である、鋼
帯搬出リール６と溶接機２の間に板プロフィル測定装置
７を有する圧延設備の概要図である。鋼帯１が溶接機２
により接続されるまでの待機時間中に、板プロフィル測
定装置７を鋼帯幅方向に走行し、鋼帯の板幅方向の板厚
分布を測定し、その測定値をクラウン変換装置８に送
り、鋼帯両端近傍の板厚差からウエッジを検出する。ま
た、板クラウン値も精度良く測定できること、圧延条件
のセットアップに板クラウン値を反映できることなど
は、第１の実施例の場合と同様である。FIG. 2 is a schematic view of a rolling equipment having a plate profile measuring device 7 between the steel strip carry-out reel 6 and the welding machine 2, which is a second embodiment of the present invention. Steel strip 1 is welder 2
During the waiting time until the connection, the plate profile measuring device 7 is run in the width direction of the steel strip, the thickness distribution of the steel strip in the width direction is measured, and the measured value is sent to the crown converter 8. A wedge is detected from the difference in plate thickness near both ends of the steel strip. Further, the sheet crown value can be measured with high accuracy, and the sheet crown value can be reflected in the setup of rolling conditions, etc., as in the case of the first embodiment.
【００２９】設定に使われる板クラウン値（コイル先端
部近傍において鋼帯の停止状態で測定）と、板幅方向の
板厚分布を測定できる板プロフィル測定装置７（例え
ば、板クラウン測定装置）により定常部において連続的
に測定された鋼帯の板クラウン値がそれぞれクラウン変
換装置８に送られる。両者の偏差に基づいて、制御出力
演算装置１１は圧延機５のロールクロス角、ロールシフ
ト量、ロールベンダー量および可変ロールクラウンなど
の圧延機の制御手段に動作指令を出す。これらの制御量
の演算および動作シーケンスの制御は公知の方法を用い
ることができる。なお、設定される板クラウン値とし
て、実施例１、２の場合においては、溶接機２とルーパ
ー３との間、または鋼帯搬出リール６と溶接機２との間
に備えられた板プロフィル測定装置７により鋼帯１の停
止時に得られる値（セットアップ値）を適用する。これ
は、板クラウン値は、コイル毎には大きく異なる場合が
あるが、コイル内では大きな変化はないことによる。The plate crown value used for setting (measured with the steel strip stopped in the vicinity of the coil tip) and the plate profile measuring device 7 (for example, plate crown measuring device) capable of measuring the plate thickness distribution in the plate width direction The plate crown values of the steel strip continuously measured in the stationary portion are sent to the crown converter 8. Based on the deviation between the two, the control output computing device 11 issues an operation command to the rolling mill control means such as the roll cross angle, roll shift amount, roll bender amount, and variable roll crown of the rolling mill 5. A known method can be used for the calculation of these control amounts and the control of the operation sequence. As the plate crown value to be set, in the case of Examples 1 and 2, the plate profile measurement provided between the welding machine 2 and the looper 3 or between the steel strip unloading reel 6 and the welding machine 2 is performed. The value (setup value) obtained when the steel strip 1 is stopped by the device 7 is applied. This is because the plate crown value may vary greatly from coil to coil, but there is no significant change within the coil.
【００３０】ウェッジの低減についても同様である。す
なわち、板プロフィル測定装置７により鋼帯１の停止状
態にて測定されたウェッジの値と、板幅方向の板プロフ
ィル測定装置７により定常部において連続的に板幅方向
に測定されたウェッジの値を用いて、圧延機５のロール
シフト量、ロールベンダー量、レベリングなどの制御手
段に対して修正の動作指令を出す。The same applies to the reduction of wedges. That is, the value of the wedge measured by the plate profile measuring device 7 when the steel strip 1 is stopped and the value of the wedge continuously measured in the plate width direction in the stationary portion by the plate profile measuring device 7 in the plate width direction. Is used to issue a correction operation command to control means such as the roll shift amount, roll bender amount, and leveling of the rolling mill 5.
【００３１】図３は、鋼帯搬出リールと溶接機との間の
板プロフィル測定装置による測定値と、圧延機直前の板
厚測定装置による測定値との照合機構を有する本発明の
別の圧延設備の概要図である。FIG. 3 shows another rolling method according to the present invention having a matching mechanism between the value measured by the plate profile measuring device between the steel strip unloading reel and the welding machine and the value measured by the plate thickness measuring device immediately before the rolling mill. It is a schematic diagram of equipment.
【００３２】板プロフィル測定装置７による連続測定方
法には、鋼帯１の板端部付近に板プロフィル測定装置７
を固定し、板厚を連続して測定する方法がある。この場
合、板クラウン値は、板厚設定値からの鋼帯板幅中央部
板厚の偏差により求めても良いし、あるいは、図３に示
されるように、圧延機５の直前に設けられた板厚測定装
置４により測定された板幅中央部での板厚測定値と、板
プロフィル測定装置７で測定された板厚を鋼帯の移動に
伴いトラッキングさせて鋼帯の長手方向の同一点で照合
することにより求めても良い。In the continuous measuring method using the plate profile measuring device 7, the plate profile measuring device 7 is provided near the plate end of the steel strip 1.
Is fixed and the plate thickness is continuously measured. In this case, the strip crown value may be obtained from the deviation of the strip thickness central portion strip thickness from the strip thickness set value, or, as shown in FIG. 3, it is provided immediately before the rolling mill 5. The measured value of the plate thickness at the central portion of the plate width measured by the plate thickness measuring device 4 and the plate thickness measured by the plate profile measuring device 7 are tracked as the steel strip moves, and the same point in the longitudinal direction of the steel strip is obtained. It may be obtained by collating with.
【００３３】さらに、複数の制御手段をその制御特性に
応じて適正に作動させる本発明の第３の実施例について
説明する。Further, a third embodiment of the present invention will be described in which a plurality of control means are properly operated according to their control characteristics.
【００３４】図４は制御手段の特性に応じた制御を行う
圧延設備の概要図である。複数の制御手段を有する圧延
機において、定常圧延中に板プロフィル測定装置７によ
り連続的に測定され、板クラウン変換装置８によりクラ
ウン値に変換された板クラウン値と、鋼帯１の先端部で
鋼帯の停止中に測定されセットアップ時に使用される板
クラウン値との偏差に基づいて制御する場合は、次のよ
うに行うのが望ましい。ここで、板クラウン変換装置
は、鋼帯の停止中の板クラウンの測定値を鋼帯全長にわ
たって連続的に演算する機能を有する。最も単純な方式
としては、最初に測定した板クラウン値をそのままホー
ルドする方式がある。FIG. 4 is a schematic diagram of rolling equipment for performing control according to the characteristics of the control means. In a rolling mill having a plurality of control means, a strip crown value continuously measured by a strip profile measuring device 7 during steady rolling and converted into a crown value by a strip crown converting device 8 and a tip portion of the steel strip 1. When controlling based on the deviation from the plate crown value that is measured during the stoppage of the steel strip and used during setup, the following is preferable. Here, the plate crown conversion device has a function of continuously calculating the measured value of the plate crown during the stop of the steel strip over the entire length of the steel strip. The simplest method is to hold the initially measured plate crown value as it is.
【００３５】板クラウン変換装置８および制御出力演算
装置１１を経て出力された制御指令は制御手段特性比較
装置１０に送られ、適正制御手段の選択と制御量の決定
がなされる。例えば、セットアップ時にはクラウン制御
範囲の大きい制御手段を用い、定常圧延時にはクラウン
制御範囲の小さい制御手段を用いるのが望ましい。具体
的な使用方法は以下のとおりである。The control command output through the plate crown converting device 8 and the control output computing device 11 is sent to the control means characteristic comparing device 10 to select the proper control means and determine the control amount. For example, it is desirable to use a control means having a large crown control range at the time of setup and a control means having a small crown control range at the time of steady rolling. The specific usage is as follows.
【００３６】ロール軸を交差できるクロス圧延機構（例
えば、ペアクロス圧延機構）とロールベンダー機構（例
えば、ワークロールベンダー機構）を有する圧延機５に
おいて、クロス圧延機構の方がクラウン制御範囲が大き
い場合は、セットアップ時にクロス圧延機構を用い、定
常圧延中の板クラウン制御にはワークロールベンダー機
構を用いるのが望ましい。In a rolling mill 5 having a cross rolling mechanism (for example, a pair cross rolling mechanism) capable of intersecting roll axes and a roll bender mechanism (for example, a work roll bender mechanism), when the cross rolling mechanism has a larger crown control range. It is desirable to use a cross rolling mechanism at the time of setup and a work roll bender mechanism to control the plate crown during steady rolling.
【００３７】ここで、制御範囲の大小は以下のようにし
て比較、決定することができる。なお、本発明において
は、ロール間に形成される機械的な間隔（以下、メカニ
カルクラウン量という。）を最大とするように制御手段
を動作させた時のロールクラウン量を、制御範囲とい
う。The sizes of the control ranges can be compared and determined as follows. In the present invention, the roll crown amount when the control means is operated so as to maximize the mechanical interval formed between the rolls (hereinafter referred to as the mechanical crown amount) is referred to as the control range.
【００３８】例えば、クロス圧延機において、そのロー
ルクロス角の動作範囲が０°〜１°であり、最大の１°
にしたときに形成されるメカニカルクラウン量が５００
μｍであるとする。一方、ワークロールベンダーの動作
範囲は０〜５０ｔｏｎ／チョックであり、最大の５０ｔ
ｏｎ／チョックにしたときに形成されるメカニカルクラ
ウン量が２００μｍであるとすれば、この場合は、ロー
ルクロス角制御の方が制御範囲が大きいことになる。For example, in a cross rolling mill, the operating range of the roll cross angle is 0 ° to 1 °, and the maximum is 1 °.
The amount of mechanical crown formed when set to 500
μm. On the other hand, the work roll vendor's operating range is 0 to 50 tons / chock, which is the maximum of 50 t
If the amount of mechanical crown formed when on / chock is set to 200 μm, the roll cross angle control has a larger control range in this case.
【００３９】また、応答速度に着目した場合は次のよう
に行うのが望ましい。ここで、応答速度が速いとは、同
一のメカニカルクラウン量が得られるまでの時間が短い
ことをいい、応答速度が遅いとは、同時間が長いことを
いう。Further, when focusing on the response speed, it is desirable to carry out as follows. Here, the response speed being fast means that the time until the same mechanical crown amount is obtained is short, and the response speed being slow means that the same time is long.
【００４０】例えば、ロール軸を交差できるクロス圧延
機構とロールをその軸方向にシフトできるロールシフト
機構を有する圧延機では、ロールに形成されるメカニカ
ルクラウン量の変化速度の速いクロス圧延機構をセット
アップ時に用い、比較的クラウン量の変化速度の遅いロ
ールシフト機構を定常圧延中の板クラウンの制御に用い
る。応答速度の速い制御手段をセットアップ時に用いる
ことによって、鋼帯間の板クラウンの差異に迅速に対応
でき、鋼帯先端部の板厚の寸法外れを低減できる。For example, in a rolling mill having a cross rolling mechanism capable of intersecting the roll axes and a roll shift mechanism capable of shifting the rolls in the axial direction, a cross rolling mechanism in which the rate of change of the mechanical crown formed on the roll is fast is set up at the time of setup. A roll shift mechanism with a relatively slow change rate of the crown amount is used to control the strip crown during steady rolling. By using the control means having a high response speed at the time of setup, it is possible to quickly deal with the difference in the plate crown between the steel strips and reduce the deviation of the thickness of the steel strip leading end.
【００４１】このように、応答速度の速い制御手段をセ
ットアップ時に用いることにより、母材のクラウン変化
の異なる鋼帯を連続的に圧延する場合に、鋼帯の溶接箇
所近傍でクラウン変化に対応した迅速な制御量の修正が
可能となる。As described above, by using the control means having a high response speed at the time of setup, in the case of continuously rolling steel strips having different crown variations of the base material, it is possible to cope with the crown variation in the vicinity of the welded portion of the steel strip. It is possible to quickly correct the control amount.
【００４２】[0042]
【発明の効果】以上詳述したように、本発明の冷間圧延
設備および鋼帯の圧延方法によれば、安価な設備によ
り、圧延鋼帯の長手方向全体にわたり、エッジドロップ
が少なく所定の板厚分布を有する鋼板を製造することが
可能であり、鋼板の製造コストの低減および品質向上に
寄与するところ大である。As described in detail above, according to the cold rolling equipment and the method for rolling a steel strip of the present invention, a predetermined plate with less edge drop can be provided over the entire length of the rolled steel strip by the inexpensive equipment. It is possible to manufacture a steel sheet having a thickness distribution, which largely contributes to the reduction of the manufacturing cost and the improvement of the quality of the steel sheet.
【図１】溶接機とルーパーとの間に板プロフィル測定装
置を有する本発明の圧延設備の概要図である。FIG. 1 is a schematic view of a rolling facility of the present invention having a plate profile measuring device between a welding machine and a looper.
【図２】鋼帯搬出リールと溶接機との間に板プロフィル
測定装置を有する本発明の別の圧延設備の概要図であ
る。FIG. 2 is a schematic view of another rolling facility of the present invention having a plate profile measuring device between a steel strip unloading reel and a welding machine.
【図３】鋼帯搬出リールと溶接機との間の板プロフィル
測定装置による測定値と、圧延機直前の板厚測定装置に
よる測定値とを照合する本発明の別の圧延設備の概要図
である。FIG. 3 is a schematic diagram of another rolling facility of the present invention that compares the measured value by the plate profile measuring device between the steel strip unloading reel and the welding machine with the measured value by the plate thickness measuring device immediately before the rolling mill. is there.
【図４】制御手段の制御特性に応じた制御を行う本発明
の別の圧延設備の概要図である。FIG. 4 is a schematic diagram of another rolling facility of the present invention that performs control according to the control characteristics of the control means.
１：鋼帯、 ２：溶接機、 ３：ルーパー、 ４：板厚測定装置、 ５：圧延機、 ６：鋼帯搬出リール、 ７：板プロフィル測定装置、 ８：クラウン変換装置、 ９：圧延機制御用計算機、 １０：制御手段特性比較装置、 １１：制御出力演算装置 1: Steel strip, 2: Welder, 3: Looper, 4: Plate thickness measuring device, 5: rolling mill, 6: Steel strip unloading reel, 7: Plate profile measuring device, 8: Crown conversion device, 9: Rolling mill control computer, 10: control means characteristic comparison device, 11: Control output computing device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ２１Ｂ 37/00 １１７Ｂ １１７Ｃ (72)発明者 角谷 泰則 大阪府大阪市中央区北浜４丁目５番33号 住友金属工業株式会社内 (56)参考文献 特開 平７−328710（ＪＰ，Ａ) 特開 平５−111708（ＪＰ，Ａ) 特開 昭54−128463（ＪＰ，Ａ) 特開 平６−269820（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21B 37/00 - 37/78 B21C 51/00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification symbol FI B21B 37/00 117B 117C (72) Inventor Yasunori Sumiya 4-533 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd. (56) References JP-A-7-328710 (JP, A) JP-A-5-111708 (JP, A) JP-A-54-128463 (JP, A) JP-A-6-269820 (JP, A) ( 58) Fields surveyed (Int.Cl. 7 , DB name) B21B 37/00-37/78 B21C 51/00
Claims (6)
機、鋼帯を貯蔵するルーパーおよび連続式冷間圧延機を
順次配設した冷間圧延設備であって、 前記搬出リールと前記ルーパーとの間に設けられた鋼帯
の幅方向の板厚分布を測定する板プロフィル測定装置
と、 前記板プロフィル測定装置による測定値に基づき板のク
ラウン値を算出するクラウン変換装置と、 前記のクラウン変換装置からの出力に基づき前記圧延機
のロールクロス角度、ロールシフト量、ロールベンダー
量およびロールクラウン量のうちの１つ以上を制御する
制御出力の演算装置とを有する冷間圧延設備。1. A cold rolling facility comprising a steel strip unloading reel, a welding machine for connecting the steel strips, a looper for storing the steel strips, and a continuous cold rolling mill, which are sequentially arranged. A plate profile measuring device that measures the plate thickness distribution in the width direction of the steel strip provided between the looper and the crown converting device that calculates the crown value of the plate based on the measurement value by the plate profile measuring device, and A cold rolling facility having a control output computing device for controlling one or more of a roll cross angle, a roll shift amount, a roll bender amount, and a roll crown amount of the rolling mill based on an output from the crown conversion device.
フィル測定装置が、鋼帯を接続する溶接機と鋼帯を貯蔵
するルーパーとの間に設けられてなる請求項１に記載の
冷間圧延設備。2. A plate profile measuring device for measuring a plate thickness distribution in the width direction of a steel strip is provided between a welding machine for connecting the steel strips and a looper for storing the steel strips. Cold rolling equipment.
フィル測定装置が、鋼帯搬出リールと鋼帯を接続する溶
接機との間に設けられてなる請求項１に記載の冷間圧延
設備。3. The cold plate according to claim 1, wherein a plate profile measuring device for measuring a plate thickness distribution in the width direction of the steel strip is provided between the steel strip unloading reel and a welding machine for connecting the steel strip. Hot rolling equipment.
の冷間圧延設備を用い、鋼帯の送りを停止した状態で、
鋼帯の幅方向の板厚分布を測定する板プロフィル測定装
置により、鋼帯の幅方向の板厚分布を測定する鋼帯の冷
間圧延方法。4. Using the cold rolling equipment according to claim 1, claim 2 or claim 3, with the feeding of the steel strip stopped,
A cold-rolling method for a steel strip, which measures a strip thickness distribution in the width direction of a strip by a strip profile measuring device that measures the strip thickness distribution in the strip width direction.
さらに、鋼帯の板クラウンを連続して測定し、セットア
ップ時には定常圧延時の制御手段よりもクラウン制御範
囲の大きい制御手段を用い、定常圧延時にはセットアッ
プ時の制御手段よりもクラウン制御範囲の小さい制御手
段を用いる請求項４に記載の鋼帯の冷間圧延方法。5. In addition to the measurement of the strip thickness distribution in the width direction of the steel strip,
Furthermore, the strip crown of the steel strip is continuously measured, and a control means having a larger crown control range than the control means during steady rolling is used during setup, and a control with a smaller crown control range than the control means during setup is used during steady rolling. The method for cold rolling a steel strip according to claim 4, wherein a means is used.
さらに、鋼帯の板クラウンを連続して測定し、セットア
ップ時には定常圧延時の制御手段よりもクラウン制御の
応答速度の速い制御手段を用い、定常圧延時にはセット
アップ時の制御手段よりもクラウン制御の応答速度の遅
い制御手段を用いる請求項４に記載の鋼帯の冷間圧延方
法。6. In addition to the measurement of the strip thickness distribution in the width direction of the steel strip,
Furthermore, the strip crown of the steel strip is continuously measured, and at the time of set-up, a control means with a faster crown control response speed than the control means at the time of steady rolling is used. The method for cold rolling a steel strip according to claim 4, wherein a control means having a low speed is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000324193A JP3485083B2 (en) | 2000-10-24 | 2000-10-24 | Cold rolling equipment and cold rolling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000324193A JP3485083B2 (en) | 2000-10-24 | 2000-10-24 | Cold rolling equipment and cold rolling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002126811A JP2002126811A (en) | 2002-05-08 |
| JP3485083B2 true JP3485083B2 (en) | 2004-01-13 |
Family
ID=18801762
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000324193A Expired - Lifetime JP3485083B2 (en) | 2000-10-24 | 2000-10-24 | Cold rolling equipment and cold rolling method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8205474B2 (en) * | 2006-03-08 | 2012-06-26 | Nucor Corporation | Method and plant for integrated monitoring and control of strip flatness and strip profile |
| US7849722B2 (en) | 2006-03-08 | 2010-12-14 | Nucor Corporation | Method and plant for integrated monitoring and control of strip flatness and strip profile |
| JP4878485B2 (en) | 2006-03-17 | 2012-02-15 | 三菱日立製鉄機械株式会社 | Cold continuous rolling equipment |
| CN104438352B (en) * | 2014-12-04 | 2016-09-14 | 镇江市宏业科技有限公司 | Research on aluminum foil rolling control system based on ABB DCS-800 current transformer |
| CN109772897B (en) * | 2017-11-14 | 2020-09-25 | 宝山钢铁股份有限公司 | Setting control method for improving full-length convexity and wedge-shaped precision of hot continuous rolling strip steel |
| JP7327332B2 (en) | 2020-09-18 | 2023-08-16 | 東芝三菱電機産業システム株式会社 | edge drop controller |
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2000
- 2000-10-24 JP JP2000324193A patent/JP3485083B2/en not_active Expired - Lifetime
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| JP2002126811A (en) | 2002-05-08 |
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