JP2006224119A - Rolling method by cold tandem mill - Google Patents

Rolling method by cold tandem mill Download PDF

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JP2006224119A
JP2006224119A JP2005038715A JP2005038715A JP2006224119A JP 2006224119 A JP2006224119 A JP 2006224119A JP 2005038715 A JP2005038715 A JP 2005038715A JP 2005038715 A JP2005038715 A JP 2005038715A JP 2006224119 A JP2006224119 A JP 2006224119A
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plate thickness
rolled
rolling mill
rolling
cold tandem
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Toshihiko Murachi
俊彦 村地
Hideo Fumiya
秀夫 文屋
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JFE Steel Corp
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling method by a cold tandem mill for stably preventing the rupture of a sheet caused by an edge crack without investing in equipment. <P>SOLUTION: In the rolling method by the cold tandem mill in a cold rolling process where a rolled stock is rolled into the target finished thickness, a flying thickness changing for changing the target thickness into an intermediate finished thickness which is larger than the finished thickness is performed at a prescribed length 1 before the edge-cracked part of the rolled stock on the basis of an edge crack information of the rolled stock which is detected at the preceding stage of the cold rolling process and, after that, a flying thickness changing for changing the target thickness into the finished thickness which is the target on and after the above point A from the intermediate finished thickness is performed at the position of a prescribed length 2 after the edge-cracked part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、連続式冷間タンデム圧延機による金属材の圧延方法に関するものであり、より詳細には、連続式冷間圧延する際の板破断を防止することができる圧延方法に関するものである。   The present invention relates to a method for rolling a metal material using a continuous cold tandem rolling mill, and more particularly to a rolling method capable of preventing plate breakage during continuous cold rolling.

連続式冷間タンデム圧延機により鋼板を連続的に冷間圧延する際には、圧延機の入側で先行熱延コイルの尾端と後行熱延コイルの先端とを溶接により接続して１本の圧延材として連続的に圧延機に供給するとともに、仕上目標板厚に圧延された圧延材を圧延機出側で切断機により所定長さに走間で切断し、通常２つの巻取機により交互に連続的に巻き取る。   When a steel sheet is continuously cold-rolled by a continuous cold tandem rolling mill, the tail end of a preceding hot-rolled coil and the tip of a subsequent hot-rolled coil are connected by welding on the entry side of the rolling mill. The rolled material is continuously supplied to the rolling mill as a rolled material, and the rolled material that has been rolled to the finish target thickness is cut into a predetermined length by a cutting machine on the delivery side of the rolling mill. Are continuously wound up alternately.

ところが、圧延材の仕上板厚や材質によっては、冷間圧延中、または、冷間圧延前に板端部に耳割れと呼ばれる欠陥が発生し、圧延時にその部分を基点として鋼板が裂け板破断となることがある。このような板破断を防止する方法として、例えば特許文献１では、冷間圧延前工程にて耳割れ欠陥を検出し、耳割れ部を除去することで板破断を防止する方法が開示されている。また、特許文献２では、冷間圧延にて耳割れ欠陥部を圧延する際、板形状を耳波形状に変化させ板端部への張力を低下させる方法が提案されている。
特開昭６１−１６５２０４号公報 特開平０４−２００９０４号公報 However, depending on the finished sheet thickness and material of the rolled material, a defect called an ear crack occurs at the end of the plate during cold rolling or before cold rolling. It may become. As a method for preventing such plate breakage, for example, Patent Literature 1 discloses a method for detecting plate cracking by removing the edge cracking portion in the pre-cold rolling step and preventing the plate breakage. . Patent Document 2 proposes a method of reducing the tension at the plate end by changing the plate shape to an ear wave shape when rolling an ear crack defect portion by cold rolling.
JP-A-61-165204 Japanese Patent Laid-Open No. 04-200904

しかしながら、上記特許文献１の耳割れ部を除去する方法では、前工程に耳割れ部の除去装置が必要となり、このための設備投資が大きくなるといった問題がある。また、上記特許文献２の圧延時に形状を変化させる方法では、耳波形状を耳伸び形状急峻度限界値以上に設定すればよいとしているものの、この限界値が鋼帯の鋼種により０．１〜１．０％の範囲というものであり、安定的に板破断の防止を行うのは難しいといった問題がある。   However, the method of removing the ear cracking part of Patent Document 1 requires a device for removing the ear cracking part in the previous process, and there is a problem that capital investment for this is increased. Further, in the method of changing the shape at the time of rolling in Patent Document 2, it is only necessary to set the ear wave shape to the ear stretch shape steepness limit value or more, but this limit value is 0.1 to 0.1 depending on the steel type of the steel strip. The range is 1.0%, and there is a problem that it is difficult to stably prevent plate breakage.

本発明は、上記事情に鑑みてなされたもので、特別な設備を設備投資することなく、耳割れによる板破断を安定的に防止することができる冷間タンデム圧延機による圧延方法を提供することを目的とする。   The present invention has been made in view of the above circumstances, and provides a rolling method using a cold tandem rolling mill that can stably prevent plate breakage due to ear cracks without investing in special equipment. With the goal.

本発明者等は、連続式冷間タンデム圧延機により圧延される材料において、同じ材質で同様な耳割れが発生していた材料を調べた結果、板厚が厚いときには、板破断の発生頻度が少ないという知見を得た。そして、耳割れ欠陥が板破断に至るのは、鋼板の強度よりも張力が勝ったときに発生することから、鋼板の強度を増すための方法として仕上板厚を大きくすることで、板破断を防止できると考えた。また、耳割れが前工程で確実に検出できればよいが、耳荒れが圧延にて耳割れに進展し板破断に至る場合もある。このような場合のほとんどは、溶接部前後で発生していること、また、材質によるところが大きいという知見も得た。   The inventors of the present invention have investigated the same material with similar ear cracks in the material rolled by a continuous cold tandem rolling mill. I got the knowledge that there is little. And since the cracks in the ear cracks occur when the tension is greater than the strength of the steel sheet, increasing the finish plate thickness as a method for increasing the strength of the steel sheet causes the plate breakage. I thought it could be prevented. Further, it is only necessary that the ear cracks can be reliably detected in the previous step, but the ear roughness may progress to the ear cracks by rolling and may lead to a plate breakage. It was also found that most of these cases occurred before and after the weld, and that it was largely due to the material.

以上の発明者等の知見をベースに、本発明は以下に示す構成をとっている。   Based on the above knowledge of the inventors, the present invention has the following configuration.

本発明の請求項１に係る発明は、目標とする仕上板厚に、被圧延材を圧延する冷間タンデム圧延機による圧延方法において、冷間タンデム圧延機によって被圧延材の圧延を行うより以前に得られた、被圧延材に存在する耳割れ部の耳割れ情報に基づき、前記耳割れ部を含む前記被圧延材の所定区間の目標板厚設定を、前記仕上板厚よりも大きい中間仕上板厚に変更する走間板厚変更を行うことを特徴とする冷間タンデム圧延機による圧延方法である。   The invention according to claim 1 of the present invention is a rolling method using a cold tandem rolling mill that rolls the material to be rolled to a target finish plate thickness before rolling the material to be rolled by the cold tandem rolling mill. Based on the edge crack information of the edge crack portion existing in the material to be rolled, the target sheet thickness setting of the predetermined section of the material to be rolled including the edge crack portion is set to an intermediate finish larger than the finish plate thickness. It is a rolling method by a cold tandem rolling mill characterized by performing a running plate thickness change to change to a plate thickness.

また本発明の請求項２に係る発明は、目標とする仕上板厚に、被圧延材を圧延する冷間タンデム圧延機による圧延方法において、冷間タンデム圧延機によって圧延される被圧延材の先行材と後行材を接合する溶接部を含む所定区間の目標板厚設定を、前記仕上板厚よりも大きい中間仕上板厚に変更する走間板厚変更を行うことを特徴とする冷間タンデム圧延機による圧延方法である。   Further, the invention according to claim 2 of the present invention is a method of rolling with a cold tandem rolling mill that rolls the material to be rolled to a target finish thickness, and precedes the material to be rolled by the cold tandem rolling mill. Cold tandem characterized by performing a running plate thickness change that changes a target plate thickness setting of a predetermined section including a welded portion that joins a material and a subsequent material to an intermediate finish plate thickness greater than the finish plate thickness This is a rolling method using a rolling mill.

また本発明の請求項３に係る発明は、請求項１または請求項２に記載の冷間タンデム圧延機による圧延方法において、前記中間仕上板厚は、前記被圧延材の前記仕上板厚および材質に基づき決定されることを特徴とする冷間タンデム圧延機による圧延方法である。
また本発明の請求項４に係る発明は、請求項１ないし請求項３のいずれかに記載の冷間タンデム圧延機による圧延方法において、前記走間板厚変更実施または不実施の決定は、前記被圧延材の前記仕上板厚および材質に基づき行われることを特徴とする冷間タンデム圧延機による圧延方法である。
さらに本発明の請求項５に係る発明は、請求項１ないし請求項４のいずれかに記載の冷間タンデム圧延機による圧延方法を用いて、冷間圧延することにより金属帯を製造することを特徴とする金属帯の製造方法である。 The invention according to claim 3 of the present invention is the rolling method by the cold tandem rolling mill according to claim 1 or 2, wherein the intermediate finish plate thickness is the finish plate thickness and material of the material to be rolled. Is a rolling method using a cold tandem rolling mill.
The invention according to claim 4 of the present invention is the rolling method using the cold tandem rolling mill according to any one of claims 1 to 3, wherein the determination of whether or not to change the running plate thickness is performed as described above. A rolling method using a cold tandem rolling mill, which is performed based on the finished plate thickness and material of the material to be rolled.
Furthermore, the invention according to claim 5 of the present invention is to manufacture a metal strip by cold rolling using the rolling method by the cold tandem rolling mill according to any one of claims 1 to 4. It is the manufacturing method of the metal strip characterized.

本発明によれば、必ず通過しなければならない冷間圧延工程において耳割れ欠陥による板破断を防止することができ、板破断後の後処理による稼働時間ロスおよび歩留ロスを防止できる。   According to the present invention, it is possible to prevent plate breakage due to an ear crack defect in the cold rolling process that must be passed, and it is possible to prevent operating time loss and yield loss due to post-processing after plate breakage.

図１は、本発明の実施に供する冷間圧延設備の一例を示す全体構成図であり、１〜５スタンドからなる連続式冷間タンデム圧延機を備えている。この連続式冷間タンデム圧延機１の入側には巻戻機２、溶接機３、ルーパ４を備え、出側には切断機５、巻取機６を備えている。巻戻機２から払い出された鋼板１０は、溶接機３により先行材の後端と後行材の先端が溶接され、ルーパ４を通った後、連続式冷間タンデム圧延機１へ連続的に供給されて、圧延機出側で仕上目標板厚となるように各スタンドで所定の板厚に圧延される。そして、圧延機を出た鋼板１０は、所定長さに切断機５で走間にて切断された後、２つの巻取機６により交互に連続的に巻き取られる。   FIG. 1 is an overall configuration diagram illustrating an example of a cold rolling facility used for carrying out the present invention, and includes a continuous cold tandem rolling mill having 1 to 5 stands. The continuous cold tandem rolling mill 1 has an unwinder 2, a welder 3, and a looper 4 on the entry side, and a cutting machine 5 and a winder 6 on the exit side. The steel plate 10 delivered from the unwinding machine 2 is welded to the continuous cold tandem rolling mill 1 after the leading end of the preceding material and the leading end of the following material are welded by the welding machine 3 and passes through the looper 4. And rolled to a predetermined plate thickness at each stand so as to have a finish target plate thickness on the exit side of the rolling mill. Then, the steel plate 10 exiting the rolling mill is cut into a predetermined length by the cutting machine 5 and is continuously wound by the two winders 6 after being cut by the cutting machine 5.

図２は、本発明の実施に供する制御装置の構成例を示す図であり、タンデム圧延機のそれぞれのスタンドには、ロールギャップを変更する圧下装置（PUC）１４およびその制御装置（圧下制御装置２２）が設置され、また、ワークロール１１のロール速度を変更する電動機１３およびその制御装置（電動機制御装置２１）が設置されている。圧延中に仕上板厚を変更する場合には、走間板厚変更が行われる。走間板厚変更に際しては、先行の圧下スケジュールから後行の圧下スケジュールへの変更に関する、各スタンド通過ごとのロールギャップ変更量およびロール速度変更量を予め圧延機計算機２４にて計算（以降、スケジュール計算と呼ぶ）し、圧延機制御装置２３に伝送される。また、走間板厚変更点を圧延機制御装置２３が鋼板の動きに伴なってミクロトラッキングし、対象点が、各スタンド通過ごとに上記変更量への変更指令を圧下制御装置２２および電動機制御装置２１に指令を出し、それに従った制御が行われる。   FIG. 2 is a diagram showing a configuration example of a control device used for carrying out the present invention. Each stand of the tandem rolling mill includes a reduction device (PUC) 14 for changing a roll gap and its control device (a reduction control device). 22) is installed, and an electric motor 13 for changing the roll speed of the work roll 11 and its control device (electric motor control device 21) are installed. When changing the finishing plate thickness during rolling, the running plate thickness is changed. When changing the running plate thickness, the rolling mill calculator 24 calculates in advance the roll gap change amount and roll speed change amount for each passage through each stand related to the change from the preceding reduction schedule to the subsequent reduction schedule (hereinafter referred to as the schedule). And is transmitted to the rolling mill control device 23. Further, the rolling mill control device 23 microtracks the plate thickness change point with the movement of the steel plate, and the target point sends a change command to the above change amount every time the stand passes. A command is issued to the device 21 and control is performed accordingly.

本発明では、前工程（例えば、酸洗工程）で検出した耳割れ欠陥検出部より所定長さ前方および所定長さ後方、または、溶接点の所定長さ前方および所定長さ後方に走間板厚変更点が生成され、圧延機制御装置がミクロトラッキングする。耳割れ欠陥検出部または溶接点の前後に設定される走間板厚変更点は、圧延材の材質、変更する板厚量、および圧延機の制御性などを考慮して決定および適宜変更されるものであり、したがって耳割れ欠陥検出部または溶接点の前後に設けられる所定の長さは、それぞれ異なることもある。   In the present invention, the running plate is a predetermined length ahead and a predetermined length rearward from the ear crack defect detection part detected in the previous process (for example, pickling process), or a predetermined length forward and a predetermined length rearward of the welding point. A thickness change point is generated and microtracking is performed by the rolling mill controller. The running thickness change point set before and after the edge crack detection part or the welding point is determined and appropriately changed in consideration of the material of the rolled material, the thickness of the sheet to be changed, the controllability of the rolling mill, etc. Therefore, the predetermined lengths provided before and after the ear crack defect detection part or the welding point may be different from each other.

ここで、耳割れ欠陥検出方法としては、例えば、光学式や磁気式などの耳割れ欠陥検出装置がある。光学式は、鋼板の上面または下面から投光器にて光を当て、耳割れ部を通過した光を反対の面に設置したカメラなどの受光器にて検出する方法である。また、磁気式は、渦流式センサなどを設置し、耳割れ部が通過したときの磁界の乱れを検出する方法である。圧延機計算機は、前工程耳割れ情報を上位計算機よりデータとして受信する。   Here, as an ear crack defect detection method, for example, there is an ear crack defect detection device such as an optical type or a magnetic type. The optical method is a method in which light is applied from the upper surface or the lower surface of a steel plate by a projector, and the light that has passed through the ear crack is detected by a light receiver such as a camera installed on the opposite surface. The magnetic method is a method of detecting a turbulence of a magnetic field when an eddy current sensor or the like is installed and an ear crack portion passes. The rolling mill computer receives the previous process ear crack information as data from the host computer.

具体的には、図６に示すように、前工程にて耳割れ欠陥検出をすると前工程のライン制御装置にその情報が伝達される。ライン制御装置は、コイルの先端からの距離を演算しているので、耳割れ欠陥検出したコイル内の位置を情報として保存することが出来る。その情報は、前工程のライン計算機に伝送、さらに上位計算機に伝送される。当コイルが圧延ラインに装入される場合に、上記データが上位計算機より圧延機計算機に送信される。ただし、コイルの先端・尾端は前工程とは逆になるので、上位計算機にてコイル全長から前工程での耳割れ欠陥位置情報を引いた値を、圧延ラインでの耳割れ欠陥情報として修正計算（位置の逆転処理）をする。   Specifically, as shown in FIG. 6, when the ear crack defect is detected in the previous process, the information is transmitted to the line control device in the previous process. Since the line control device calculates the distance from the tip of the coil, the position in the coil where the ear crack defect is detected can be stored as information. The information is transmitted to the line computer in the previous process and further transmitted to the host computer. When the coil is inserted into the rolling line, the above data is transmitted from the host computer to the rolling mill computer. However, since the tip and tail ends of the coil are the opposite of the previous process, the value obtained by subtracting the ear crack defect position information in the previous process from the total coil length in the host computer is corrected as the ear crack defect information in the rolling line. Perform calculation (position reversal processing).

つぎに、耳割れ欠陥検出部の前後に設定される所定長さを決定するために、圧下率に応じたテーブルを持っている。ただし、中間仕上板厚で圧延されている部分はオフゲージであるから、極力短いことが望ましい。中間仕上板厚については、仕上板厚、材質に応じたテーブル値で持たせておく。また、耳割れ情報に基づく耳割れ部前後または溶接部前後での厚目付け圧延の実施可否についても、仕上板厚、材質を考慮したテーブルにて決定される。中間仕上板厚については、仕上板厚の５０％以内の厚目つけで、材質が硬いほうが厚目付け量は少ない。また、実施可否については、仕上板厚が薄く、硬い材料（例えば、カーボン量が多い）や特殊材（例えば、シリコン量が多い）で実施率が高くなる。   Next, in order to determine a predetermined length set before and after the ear crack defect detection unit, a table corresponding to the rolling reduction is provided. However, since the portion rolled with the intermediate finish plate thickness is off-gauge, it is desirable that it be as short as possible. The intermediate finish plate thickness is given as a table value corresponding to the finish plate thickness and material. In addition, whether or not thickening rolling can be performed before and after the ear cracking part or before and after the welding part based on the ear cracking information is also determined by a table in consideration of the finished plate thickness and material. As for the intermediate finish plate thickness, the fabric weight is within 50% of the finish plate thickness, and the harder the material, the smaller the amount of fabric weight. In addition, regarding the feasibility of implementation, the implementation rate is high with a thin finish plate and a hard material (for example, a large amount of carbon) or a special material (for example, a large amount of silicon).

走間板厚変更の方法について、図３に示すフローチャートに従って、詳細に説明する。圧延機計算機２４は、前述した中間板厚設定テーブル、厚目付け圧延実施可否テーブル、および圧延材料に応じた目標とする仕上板厚ｔ１を持っている。圧延材料が決まると、先ず厚目付け圧延実施フラグを参照する(S100)。ここで厚目付け圧延実施が決定されると、先の中間板厚設定テーブルから圧延材料に応じた中間仕上板厚αおよび中間仕上板厚部長さβが参照され、中間仕上板厚ｔ１ａおよび中間仕上板厚部長さＬとして設定される(S101)。   The method for changing the running plate thickness will be described in detail according to the flowchart shown in FIG. The rolling mill computer 24 has the above-described intermediate plate thickness setting table, thick weight rolling execution availability table, and a target finish plate thickness t1 according to the rolling material. When the rolling material is determined, first, the thickening rolling execution flag is referred to (S100). Here, when it is decided to carry out thickening rolling, the intermediate finish plate thickness α and the intermediate finish plate thickness portion length β corresponding to the rolling material are referred to from the previous intermediate plate thickness setting table, and the intermediate finish plate thickness t1a and the intermediate finish are determined. The plate thickness portion length L is set (S101).

次に、１回目の走間板厚変更として、仕上板厚ｔ１から中間仕上板厚ｔ１ａへのスケジュール計算を実施するとともに、２回目の走間板厚変更として、中間仕上板厚ｔ１ａから２回目の走間板厚変更点以降の目標とする仕上板厚ｔ２へのスケジュール計算も実施する(S102)。これら計算結果のデータを圧延機制御装置に伝送しておく(S103)。   Next, a schedule calculation from the finishing plate thickness t1 to the intermediate finishing plate thickness t1a is performed as the first running plate thickness change, and the second run from the intermediate finishing plate thickness t1a as the second running plate thickness change. The schedule calculation to the target finishing thickness t2 after the running thickness change point is also performed (S102). Data of these calculation results is transmitted to the rolling mill control device (S103).

圧延機制御装置は、１回目の開始点および２回目の開始点をミクロトラッキングしている。まず、１回目の走間板厚変更点が第１スタンドを通過したかどうか監視(S104)しており、通過したならば１回目の走間板厚変更(S105)すなわち前記データをもとにロールギャップおよびロール速度の変更を行う。その後、２回目の走間板厚変更点が第１スタンドを通過したかどうか監視(S106)し、通過したならば２回目の走間板厚変更(S107)を行う。２スタンド以降も同様に、各スタンド通過ごとに２回の走間板厚変更を繰返す。なお、S100で厚目付け圧延未実施が決定されると、仕上板厚ｔ１から切断点以降の目標とする仕上板厚ｔ２へのスケジュール計算を実施(S110)し、これら結果を圧延機制御装置にデータ伝送(S103)を行う。圧延機制御装置は、切断点以降は目標とする仕上板厚ｔ２となるように各スタンド通過ごとに前記データをもとにロールギャップおよびロール速度の変更を行う。   The rolling mill control device microtracks the first start point and the second start point. First, it is monitored whether or not the first running thickness change point has passed the first stand (S104). If it has passed, the first running thickness change (S105), that is, based on the above data. Change the roll gap and roll speed. Thereafter, it is monitored whether or not the second running plate thickness change point has passed the first stand (S106), and if it has passed, the second running plate thickness change (S107) is performed. Similarly, after 2 stands, the plate thickness change is repeated twice for each stand passing. When it is determined in S100 that heavy weight rolling is not performed, schedule calculation from the finished sheet thickness t1 to the target finished sheet thickness t2 after the cutting point is performed (S110), and these results are sent to the rolling mill control device. Data transmission (S103) is performed. The rolling mill control device changes the roll gap and the roll speed based on the data for each passage through each stand so that the target finishing thickness t2 is obtained after the cutting point.

以上説明したような圧延手順をとることにより、耳割れ欠陥部、または溶接部の前後所定長さが厚目に圧延され、板破断の発生しない安定した操業が可能となる。   By adopting the rolling procedure as described above, a predetermined length before and after the ear crack defect portion or the welded portion is rolled to a thick thickness, and a stable operation without causing plate breakage becomes possible.

図１、図２に示した冷間圧延設備を用いて、仕上板厚０．４ｍｍ、板幅９００〜１２００ｍｍのＳＣ材（カーボン量が多い）に対して、本発明を適用した実施例を紹介する。対象材の溶接部前後の中間仕上板厚を０．５ｍｍに設定し、また、溶接部前後の所定長さを３０ｍずつと同じ長さに設定した。図５に、この時の対象材の仕上板厚変動の一例を実測したチャートを示す。溶接部前後６０ｍの間、１００μｍ仕上板厚が厚めに圧延されている様子を示している。この条件のもと圧延した場合、板破断の発生無く圧延することができた。   Introducing an embodiment in which the present invention is applied to an SC material (with a large amount of carbon) having a finishing plate thickness of 0.4 mm and a plate width of 900 to 1200 mm using the cold rolling equipment shown in FIGS. To do. The intermediate finish plate thickness before and after the welded portion of the target material was set to 0.5 mm, and the predetermined length before and after the welded portion was set to the same length of 30 m. FIG. 5 shows a chart obtained by actually measuring an example of the variation in the finish plate thickness of the target material at this time. A state is shown in which the finished plate thickness of 100 μm is rolled thickly between 60 m before and after the welded portion. When rolling was performed under these conditions, it was possible to roll without occurrence of sheet breakage.

本発明に係る冷間圧延設備の全体構成例を示す図である。It is a figure which shows the example of whole structure of the cold rolling equipment which concerns on this invention. 本発明に係る制御装置の構成例を示す図である。It is a figure which shows the structural example of the control apparatus which concerns on this invention. 処理フローを示すフローチャートである。It is a flowchart which shows a processing flow. 走間板厚変更の一例を示す概略図である。It is the schematic which shows an example of a board thickness change. 実施例における仕上板厚変動を示すチャートである。It is a chart which shows the finishing board thickness fluctuation | variation in an Example. 耳割れ位置情報の伝達フローを説明する図である。It is a figure explaining the transmission flow of an ear crack position information.

符号の説明Explanation of symbols

１ 冷間タンデム圧延機
２ 巻戻機
３ 溶接機
４ ルーパ
５ 切断機
６ 巻取機
１０ 鋼板
１１ ワークロール
１２ バックアップロール
１３ 電動機
１４ 圧下装置（PUC）
２１ 電動機制御装置
２２ 圧下制御装置
２３ 圧延機制御装置
２４ 圧延機計算機 DESCRIPTION OF SYMBOLS 1 Cold tandem rolling mill 2 Rewinding machine 3 Welding machine 4 Looper 5 Cutting machine 6 Winding machine 10 Steel plate 11 Work roll 12 Backup roll 13 Electric motor 14 Reduction device (PUC)
21 Electric motor control device 22 Rolling control device 23 Rolling mill control device 24 Rolling mill computer

Claims (5)

目標とする仕上板厚に、被圧延材を圧延する冷間タンデム圧延機による圧延方法において、
冷間タンデム圧延機によって被圧延材の圧延を行うより以前に得られた、被圧延材に存在する耳割れ部の耳割れ情報に基づき、前記耳割れ部を含む前記被圧延材の所定区間の目標板厚設定を、前記仕上板厚よりも大きい中間仕上板厚に変更する走間板厚変更を行うことを特徴とする冷間タンデム圧延機による圧延方法。 In the rolling method by a cold tandem rolling mill that rolls the material to be rolled to the target finish thickness,
Based on the ear crack information of the ear crack part existing in the material to be rolled, obtained before rolling the material to be rolled by the cold tandem rolling mill, the predetermined section of the material to be rolled including the ear crack part A rolling method using a cold tandem rolling mill, wherein a running plate thickness change is performed to change a target plate thickness setting to an intermediate finish plate thickness larger than the finish plate thickness. 目標とする仕上板厚に、被圧延材を圧延する冷間タンデム圧延機による圧延方法において、
冷間タンデム圧延機によって圧延される被圧延材の先行材と後行材を接合する溶接部を含む所定区間の目標板厚設定を、前記仕上板厚よりも大きい中間仕上板厚に変更する走間板厚変更を行うことを特徴とする冷間タンデム圧延機による圧延方法。 In the rolling method by a cold tandem rolling mill that rolls the material to be rolled to the target finish thickness,
Running to change the target plate thickness setting of a predetermined section including the welded portion that joins the preceding material and the subsequent material of the material to be rolled to be rolled by a cold tandem rolling mill to an intermediate finishing plate thickness larger than the finishing plate thickness A rolling method using a cold tandem rolling mill characterized in that the thickness of the sheet is changed. 請求項１または請求項２に記載の冷間タンデム圧延機による圧延方法において、
前記中間仕上板厚は、前記被圧延材の前記仕上板厚および材質に基づき決定されることを特徴とする冷間タンデム圧延機による圧延方法。 In the rolling method by the cold tandem rolling mill according to claim 1 or 2,
The intermediate finishing plate thickness is determined based on the finishing plate thickness and material of the material to be rolled, and a rolling method using a cold tandem rolling mill. 請求項１ないし請求項３のいずれかに記載の冷間タンデム圧延機による圧延方法において、
前記走間板厚変更実施または不実施の決定は、前記被圧延材の前記仕上板厚および材質に基づき行われることを特徴とする冷間タンデム圧延機による圧延方法。 In the rolling method by the cold tandem rolling mill according to any one of claims 1 to 3,
The rolling method using a cold tandem rolling mill is characterized in that the determination of whether or not to change the running plate thickness is made based on the finished plate thickness and material of the material to be rolled. 請求項１ないし請求項４のいずれかに記載の冷間タンデム圧延機による圧延方法を用いて、冷間圧延することにより金属帯を製造することを特徴とする金属帯の製造方法。 A method for producing a metal strip, comprising producing a metal strip by cold rolling using the rolling method by the cold tandem rolling mill according to any one of claims 1 to 4.
JP2005038715A 2005-02-16 2005-02-16 Rolling method by cold tandem mill Pending JP2006224119A (en)

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Cited By (3)

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JP2021065896A (en) * 2019-10-18 2021-04-30 日本製鉄株式会社 Control device, control method, and control program
JP2022012423A (en) * 2020-07-01 2022-01-17 Ｊｆｅスチール株式会社 Determination method of roll gap and flying thickness change method
WO2022034654A1 (en) * 2020-08-12 2022-02-17 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 Control device for rolling device, rolling equipment, and method for operating rolling device

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JP2021065896A (en) * 2019-10-18 2021-04-30 日本製鉄株式会社 Control device, control method, and control program
JP7303439B2 (en) 2019-10-18 2023-07-05 日本製鉄株式会社 Control device, control method, and control program
JP2022012423A (en) * 2020-07-01 2022-01-17 Ｊｆｅスチール株式会社 Determination method of roll gap and flying thickness change method
JP7222380B2 (en) 2020-07-01 2023-02-15 Ｊｆｅスチール株式会社 Roll gap determination method and running strip thickness change method
WO2022034654A1 (en) * 2020-08-12 2022-02-17 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 Control device for rolling device, rolling equipment, and method for operating rolling device
JPWO2022034654A1 (en) * 2020-08-12 2022-02-17
JP7222152B2 (en) 2020-08-12 2023-02-14 Ｐｒｉｍｅｔａｌｓ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｊａｐａｎ株式会社 Control device for rolling mill, rolling equipment, and method for operating rolling mill

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