JPS6024213A - Control device of meandering in rolling mill - Google Patents

Abstract

PURPOSE:To control satisfactorily meandering without causing any hindrance in rolling by storing the position of a rolling material in its width direction basing on a biting signal of material and providing a means which gives the stored signal as a target value of the control quantity of meandering. CONSTITUTION:When the tip of a rolling material (a) is bitten by a rolling mill 1, a load cell 3 detects it and outputs a signal 6 of the change of a rolling down force to a comparator 7. After comparing the load signal 6 with a set signal 8, a biting signal 10 is inputted to a timing-generation circuit 9, which outputs a timing signal 11 to a storage circuit 12. A signal 20 of a meander detector 13 is previously inputted to the circuit 12, in which the position of material (a) at the time of inputting the signal 11 is stored. The position of material (a) is inputted to an adder 14 as a target-value signal 19, to output its deviation 16 from the position signal 20 outputted from the detector 13 to a meander controlling adjuster 15 so as to treat the deviation. A roll gap is adjusted by controlling a rolling reduction device 2 basing on the treating signal to control the position in the width direction of material (a) to the position at the time of biting.

Description

【発明の詳細な説明】 本発明は圧延機の蛇行制御装置に関１Ｊ゛る。[Detailed description of the invention] The present invention relates to a meandering control device for a rolling mill.

圧延作業に於いて、圧延中の条件によっては圧延材がロ
ールの中央に留まることができずに第１図に示す如く圧
延の進行とどもにロール端部の方へ移動してしまう現象
がＪ：＜知られており、該現象は蛇行と呼ばれている。In rolling operations, depending on the conditions during rolling, there is a phenomenon in which the rolled material cannot stay in the center of the rolls and moves toward the ends of the rolls as rolling progresses, as shown in Figure 1. :<This phenomenon is called meandering.

ここで、圧延材の蛇行についてｎｔｐに説明覆ると、第
１図は何等かの原因で圧延材ａがワークロールｂの中央
から右側へ寄ってしまった状態を示すもので、このよう
な場合圧延力は左右アンバランスとなり、ロールギャッ
プは右側のギャップの方が左側よりも広くなる。ところ
で、ロールｂの周速は左右で一様であるにも拘わらず右
側の方のギャップが広いので、単位時間当りの圧延材の
体積流量は右側の方が大ぎくなる。Here, to explain the meandering of the rolled material to NTP, Fig. 1 shows a state where the rolled material a has shifted to the right side from the center of the work roll b for some reason. The force becomes unbalanced between the left and right sides, and the roll gap on the right side is wider than on the left. Incidentally, although the circumferential speed of roll b is uniform on the left and right sides, the gap on the right side is wider, so the volumetric flow rate of the rolled material per unit time is larger on the right side.

又、入側での圧延材の厚さが左右対称であるとすれば、
より大きい体積流量の側では材料がより早く引込まれる
ことになる。この結果圧延材ａは右側へ寄ってゆき、ロ
ールギャップの左右差が助長され更に急速に右端へ近付
いてゆき、蛇行という現象が起る。Also, if the thickness of the rolled material at the entry side is symmetrical,
The material will be drawn in faster on the side with a higher volumetric flow rate. As a result, the rolled material a moves to the right side, the difference between the left and right roll gaps is amplified, and the rolled material a rapidly approaches the right end, resulting in a meandering phenomenon.

上記した蛇行が起ると安定した圧延を行なえず甚しい場
合には圧延不能となる。従って、安定した圧延を行ない
圧延の稼動率を向上させる為蛇行制御は不可欠である。If the meandering described above occurs, stable rolling cannot be performed, and in severe cases, rolling becomes impossible. Therefore, meandering control is essential in order to perform stable rolling and improve the rolling operation rate.

蛇行制御に於いて、理想的には圧延材の幅方向の中心と
圧延機の左右中心とが一致り゛る様制御されることが望
ましいが、両者に差がある場合あまり急激に圧延材の位
置を修正すると左右［１−ルギ１７ツプの急激な変化を
招き、形状不良用には絞り込み等が発生しかえつ゛ｒ圧
延作業に支障を来たず虞れがある。In meandering control, ideally it is desirable to control the widthwise center of the rolled material so that it coincides with the lateral center of the rolling mill, but if there is a difference between the two, the rolled material may move too rapidly. If the position is corrected, there will be a sudden change of 1-17 mm from side to side, and if the shape is defective, squeezing may occur, which may interfere with the rolling operation.

特に、第２図に示ザ様な連続ミルでは設備費の点から、
例えば、に流スタンドＣ１、Ｃ２＋０３　。In particular, in a continuous mill like the one shown in Figure 2, from the point of view of equipment costs,
For example, Niryu Stand C1, C2+03.

Ｃ４の圧下装置を電動式、下流スタンドＣ５。C4's lowering device is electric, downstream stand C5.

Ｃ６の圧下装置を油圧式にしているのが通常であり、各
スタンド圧下系の応答性の制約から実際に蛇行制御を行
なえるのは下流スタンドＣ５、Ｃ６にかぎられる。この
為、これ等のスタンドＣ５，０６で圧延機の左右中心と
圧延材の幅方向中心どを一致さＵるように蛇行制御を行
なうと、前述の不具合を生じさせる恐れがあった。Normally, the lowering device of C6 is hydraulic type, and due to the responsiveness of each stand lowering system, meandering control can actually be performed only at downstream stands C5 and C6. For this reason, if meandering control is performed on these stands C5, C06 so that the lateral center of the rolling mill and the widthwise center of the rolled material are aligned, the above-mentioned problems may occur.

本発明は斯かる実情を鑑みなした；ｂので、蛇行制御に
おいて適切な目標値を与え、該目標値を基準に蛇行制御
を行うことにより安定な圧延を可能とした蛇行制御装置
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; (b) To provide a meandering control device that provides an appropriate target value in meandering control and performs meandering control based on the target value, thereby enabling stable rolling. With the goal.

以下図面を参照しつつ本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.

第３図は本発明の実施例の基本構成図であり、図中１は
圧延機、ａは圧延材、２は油圧圧下装置、３はロードセ
ルを示す。FIG. 3 is a basic configuration diagram of an embodiment of the present invention, in which 1 indicates a rolling mill, a indicates a rolled material, 2 indicates a hydraulic rolling device, and 3 indicates a load cell.

［−１−ドセル３はワークロール４、バックアップロー
ル５が受ける荷重変化を検出するものであり、ロードセ
ル３の信号６は比較器７に入力される。比較器７は、予
め設定信号８が入力されており、ロードセル３からの信
号６と設定信号８とが比較され、信号６が所定のレベル
以上の場合信号１０が出力される。該信号１０はタイミ
ング発生回路９に入力され、この時タイミング発生回路
９は記憶回路１２を働かせる構成となっている。[-1- The load cell 3 detects changes in the load applied to the work roll 4 and the backup roll 5, and the signal 6 of the load cell 3 is input to the comparator 7. The comparator 7 is input with a setting signal 8 in advance, compares the signal 6 from the load cell 3 with the setting signal 8, and outputs a signal 10 when the signal 6 is at a predetermined level or higher. The signal 10 is input to the timing generation circuit 9, and the timing generation circuit 9 is configured to cause the storage circuit 12 to operate at this time.

１３は圧旧１の入側に設けられた蛇行検出器であって、
圧延材ａの幅端位置を検出して圧延１４　ａの位置を検
出しく９るものであり、その出力は前記記憶回路１２と
加算器１４へ入力されている。13 is a meandering detector provided on the inlet side of the compression 1,
The width end position of the rolled material a is detected to determine the position of the rolled material 14a, and its output is input to the memory circuit 12 and the adder 14.

加算器１４の出力は蛇行制ａｌｌ調節器１５へ入）〕さ
れ、左右の圧下修正信号１７どして圧下制御装＠１８へ
入力される。圧下１１ｉ制御装＠１８は圧下修正信号１
７を基に４ノーボ弁（図示Ｉ４ず）等を適宜制御し圧延
ＩＩＩ　１の左右のギ亀・ツブを制御り゛る。The output of the adder 14 is input to the meander control all controller 15), and is inputted as left and right reduction correction signals 17 to the reduction control device @18. The reduction 11i control device @18 is the reduction correction signal 1
7, the 4 novo valves (I4 not shown) and the like are controlled as appropriate to control the left and right gears and knobs of the rolling III 1.

次に作動を説明する。Next, the operation will be explained.

圧延（イａが移）１ユし、その先端が圧延機１に噛込ま
れるど、噛込みによる圧Ｆ力の変動がロードはル３に検
出され、圧下力変動は信号として比較器７に入力される
。比較器１では設定信号８と荷重信号６とを比較し、荷
重信号６が設定信号８Ｊ：り大きい値であった場合に圧
延材ａの噛込みがあったどして、信＠１０をタイミング
発生回路９へ出力する。タイミング発生回路９では該信
号１０を受【」で、タイミング信号を記憶回路１２へ入
力する。記憶回路１２へは蛇行検出器１３からの圧延材
ａの幅７ｉ向の位置、即ち蛇行量が入力されており、タ
イミング信号１１が入力されると、この人力前の圧延材
ａの位置が記憶され、記憶された圧延Ｈの位置が目標値
信号１９と（）て５− 加幹器１４へ入力される。蛇行検出器１３からの信号２
０は加算器１４にも直接入力されており、加算器１４で
は目標値に対する時々刻々の圧延材ａの位置が比較され
、その偏差１６が蛇行制御調節器１５へ入力され処理さ
れる。When the tip of the rolling machine (A is transferred) is bitten by the rolling mill 1, the variation in the rolling force due to the biting is detected by the load lever 3, and the rolling force variation is sent as a signal to the comparator 7. is input. The comparator 1 compares the setting signal 8 and the load signal 6, and if the load signal 6 is larger than the setting signal 8J, it is assumed that the rolled material a is jammed and the signal @10 is set at the timing. Output to generation circuit 9. The timing generation circuit 9 receives the signal 10 and inputs the timing signal to the storage circuit 12. The position of the rolled material a in the width direction 7i from the meandering detector 13, that is, the amount of meandering, is input to the memory circuit 12, and when the timing signal 11 is input, the position of the rolled material a before the manual input is stored. The stored rolling position H is inputted to the 5-stack booster 14 as a target value signal 19 (). Signal 2 from meandering detector 13
0 is also directly input to the adder 14, and the adder 14 compares the position of the rolled material a from time to time with respect to the target value, and the deviation 16 is input to the meandering control regulator 15 for processing.

而して、信号１Ｇを基に圧下制御装置１８が油圧圧下装
置ｊ１２を制御して、左右のロールギャップを調節し、
圧延材ａの幅方向位置を圧延機噛込時の位置に制御する
。Then, based on the signal 1G, the rolling down control device 18 controls the hydraulic rolling down device j12 to adjust the left and right roll gaps,
The widthwise position of the rolled material a is controlled to the position when it is bitten by the rolling mill.

以上述べた如く本発明では蛇行制御の目標値を噛込時の
位置どしており、圧延に支障を来たさない蛇行制御が可
能である。As described above, in the present invention, the target value for meandering control is set to the position at the time of biting, and meandering control that does not impede rolling is possible.

尚−上記実施例では圧延材の噛込みを［Ｉ−ドセルによ
って検知したが、ホットメタルディテクタ等圧延材の噛
込みを直接或は間接に検知し得るものであればどの様な
検知手段を用いてもよい。又、蛇行検出器は出側又は入
側及び出側の両方に設けてもよい。In the above embodiments, the jamming of the rolled material was detected by the I-Docell, but any detection means that can directly or indirectly detect the jamming of the rolled material, such as a hot metal detector, may be used. It's okay. Further, the meandering detector may be provided on the exit side or both the entrance side and the exit side.

以上述べた如く本発明によれば、蛇行制御の於いて最適
な目標値を与え得るので安定な制御６一As described above, according to the present invention, an optimal target value can be provided in meandering control, resulting in stable control.

Claims (1)

【特許請求の範囲】[Claims] １）　圧延材の蛇行量を検出する検出器を設け、該検出
器の信号を基に、圧延機の作業側、駆動側のロールギャ
ップを変える蛇行制御装置に於いて、圧延＋１の該圧延
機への噛込みを直接、或いは間接に検出してその信号を
基に、その時点での圧延材の幅方向位置を記憶し、該記
憶された信号を蛇行制御１１１３の目標値どして与える
ことを特徴とする圧延機の蛇行制御装置。1) In a meandering control device that is provided with a detector that detects the amount of meandering of the rolled material and changes the roll gap on the working side and drive side of the rolling mill based on the signal from the detector, To directly or indirectly detect the biting in the rolled material, store the width direction position of the rolled material at that time based on the signal, and give the stored signal as a target value for the meandering control 1113. A rolling mill meandering control device featuring: