JPH06190422A - Temper rolling method - Google Patents
Temper rolling methodInfo
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- JPH06190422A JPH06190422A JP5243524A JP24352493A JPH06190422A JP H06190422 A JPH06190422 A JP H06190422A JP 5243524 A JP5243524 A JP 5243524A JP 24352493 A JP24352493 A JP 24352493A JP H06190422 A JPH06190422 A JP H06190422A
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- mill
- elongation
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- load
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、金属帯連続焼鈍ライ
ンの調質圧延方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temper rolling method for a metal band continuous annealing line.
【０００２】[0002]
【従来の技術】特開昭６３−１８３７０１号では、連続
焼鈍ラインの調質圧延方法として、ライン速度減速時の
圧延荷重が予め求めておいた耳ジワ発生時の最低荷重に
達すると同時に一定張力・一定伸率制御から一定張力・
一定荷重制御に切替え、その後ライン速度を増速させ、
所定ライン速度に達した時に一定張力・一定伸率制御に
切替える方法が開示されている。2. Description of the Related Art In Japanese Patent Laid-Open No. 63-183701, as a temper rolling method for a continuous annealing line, the rolling load at the time of decelerating the line speed reaches a predetermined minimum load at the time of occurrence of seizures and at the same time a constant tension is applied.・ Constant elongation control to constant tension ・
Switch to constant load control, then increase the line speed,
A method of switching to constant tension / constant elongation control when a predetermined line speed is reached is disclosed.
【０００３】また一般的に連続焼鈍ライン等の調質圧延
機では、ナローラップシーム溶接による金属帯の接続部
（以下ナローラップシーム溶接点という）通過時には、
該溶接点が調質圧延機（以下ミルという）に到達する前
までにミル通過速度となるようにライン速度を減速する
と共に、ライン速度減速完了までにミル通過荷重となる
ように伸率制御を中止して圧延荷重を下げる操作を行な
っており、更に上記溶接点がミル通過後、直ちにライン
速度を加速すると同時に、ミル通過荷重から次圧延条件
の目標荷重へ上げる操作を行ない、該目標荷重に到達
後、伸率制御に切替える方法が採用されている。Generally, in a temper rolling mill such as a continuous annealing line, when passing through a metal strip connection portion (hereinafter referred to as narrow lap seam welding point) by narrow lap seam welding,
The line speed is decelerated so as to reach the mill passing speed before the welding point reaches the temper rolling mill (hereinafter referred to as a mill), and the elongation control is performed so that the mill passing load is reached by the completion of the line speed deceleration. The operation is stopped to reduce the rolling load, and further, after the welding point passes through the mill, the line speed is accelerated immediately, and at the same time, the operation to increase from the mill passing load to the target load of the next rolling condition is performed, and the target load is reduced. After reaching, the method of switching to elongation control is adopted.
【０００４】一方、ナローラップシーム溶接点以外で金
属帯のサイズ、材質、伸率等の圧延条件の変更される特
異点（具体的にはサイズ、材質、伸率変更のあるフラッ
シュバット溶接やレーザ溶接による酸洗・冷間圧延溶接
点、原板板厚変更点、伸率変更点、焼鈍サイクル変更点
等の規格変更点等がある）がミルを通過する時には、ラ
イン速度を減速することなく、伸率制御を継続させなが
ら次圧延条件へ移行する方法が採用されている。On the other hand, other than the narrow lap seam welding point, a singular point where the rolling conditions such as the size, material and elongation of the metal strip are changed (specifically, flash butt welding or laser where the size, material and elongation are changed). There is a change in specifications such as pickling / cold rolling welding points by welding, changes in original plate thickness, changes in elongation, changes in annealing cycle, etc.) without passing through the line speed when passing through the mill. The method of shifting to the next rolling condition while continuing the elongation control is adopted.
【０００５】[0005]
【発明が解決しようとする課題】ナローラップシーム溶
接点は金属帯の板厚に対し、1.2〜1.8倍の厚みとなり、
該溶接点がミルを通過する時に瞬時的に荷重が増大し、
該ミルのワークロールに疵が発生し、この疵がその後圧
延時に金属帯表面へ転写される。The narrow lap seam weld point is 1.2 to 1.8 times the thickness of the metal strip,
The load increases momentarily as the weld passes through the mill,
A flaw is generated on the work roll of the mill, and this flaw is subsequently transferred to the surface of the metal strip during rolling.
【０００６】これを防止する方法として圧延荷重を50〜
180ton程度に下げて、上記溶接点のミル通過を行なって
いる。[0006] As a method of preventing this, a rolling load of 50 to
It is lowered to about 180 tons and the above-mentioned welding point passes through the mill.
【０００７】上述した特開昭６３−１８３７０１号の方
法においても、ワークロールの溶接点通過疵発生限界荷
重は耳ジワ発生限界荷重よりも小さく、図１４に示すよ
うに、溶接点がミルを通過する前までに、実質的にはミ
ル前1m程度のＢ点までに、ミル通過荷重となるようにラ
イン速度減速中に圧延荷重を操作していた。Also in the method of Japanese Patent Laid-Open No. 63-183701 mentioned above, the limit load for the flaw passing through the welding point of the work roll is smaller than the limit load for generating the edge wrinkles, and the welding point passes through the mill as shown in FIG. Before that, the rolling load was operated while the line speed was being reduced so that the load passed through the mill was substantially reached up to point B about 1 m before the mill.
【０００８】しかし、荷重変更速度は単位時間当たり一
定であるため、ライン速度減速中に荷重変更を行なうと
伸率不良の長さが長くなる欠点があった。However, since the load changing speed is constant per unit time, if the load is changed during the line speed deceleration, there is a drawback that the length of the elongation failure becomes long.
【０００９】また同図に示すように溶接点がミル通過
後、実質的にはミル後1m程度のＣ点から、次圧延条件の
目標荷重となるようにライン速度加速中に該荷重を操作
しており、この場合も伸率不良の長さが長くなる欠点が
あった（図中一点鎖線が目標伸率の範囲を示してい
る）。Further, as shown in the figure, after the welding point passes through the mill, the load is manipulated during line speed acceleration so as to reach the target load of the next rolling condition from point C substantially 1 m after the mill. In this case as well, there was a drawback in that the length of defective elongation becomes long (the chain line in the figure indicates the range of the target elongation).
【００１０】一方圧延条件の変更される特異点を高荷重
でミル通過させてもミルのワークロールに疵が発生する
ことはないため、図１５に示すように特異点がミルを通
過する時にはライン速度を減速することなく、伸率制御
を継続させながら次圧延条件へ移行している。そのため
次圧延材においては伸率制御によるフィードバック制御
で荷重を調整することとなり、その結果伸率不良の長さ
が長くなる欠点があった（図中一点鎖線が目標伸率の範
囲を示している）。On the other hand, even if a singular point whose rolling condition is changed is passed through the mill with a high load, no flaws are generated in the work rolls of the mill. Therefore, as shown in FIG. It continues to the elongation control without decelerating the speed and shifts to the next rolling condition. Therefore, in the next rolled material, the load is adjusted by the feedback control by the elongation control, and as a result, there is a drawback that the length of the elongation failure becomes long (the one-dot chain line in the figure indicates the range of the target elongation). ).
【００１１】本発明は従来技術の以上の様な問題に鑑み
創案されたもので、金属帯のナローラップシーム溶接点
或いは特異点のミル通過時における伸率不良の長さを低
減させ、製品の歩留を向上させることを目的とするもの
である。The present invention was devised in view of the above problems of the prior art, and reduces the length of poor elongation at the time of passing a narrow lap seam welding point of a metal band or a singular point through a mill, and The purpose is to improve the yield.
【００１２】[0012]
【課題を解決するための手段】そのため本発明の調質圧
延方法は、金属帯のサイズ、材質、伸率等の圧延条件の
変更される特異点或いはナローラップシーム溶接点が連
続式調質圧延機を通過する直前までにライン速度をミル
通過速度に減速させ、該ミル通過速度に到達した後その
ライン速度を保持すると共に、伸率制御から一定荷重制
御に切替え、上記特異点或いは溶接点が該圧延機を通過
した後、圧延荷重或いは張力のうち少なくとも一方を操
作し、その目標範囲に到達後伸率制御に切替えると共
に、上記ミル通過速度から加速することを基本的特徴と
している。Therefore, the temper rolling method of the present invention is a continuous temper rolling in which the singularity or narrow lap seam welding point where the rolling conditions such as the size, material and elongation of the metal strip are changed. The line speed is reduced to the mill passing speed immediately before passing through the machine, and the line speed is maintained after reaching the mill passing speed, and the elongation control is switched to the constant load control. After passing through the rolling mill, at least one of the rolling load and the tension is operated to switch to the elongation control after reaching the target range and to accelerate from the mill passing speed.
【００１３】一方第３発明に係る調質圧延方法は、上記
第１発明法において再度伸率制御に切替えた時に実施し
ていたライン速度の加速を行なわず、所定の伸率範囲に
到達した後に上記ミル通過速度から加速するようにした
ものである。On the other hand, the temper rolling method according to the third aspect of the invention does not perform the line speed acceleration that was performed when the elongation rate control was switched to again in the first aspect of the invention method described above, but after reaching the predetermined elongation rate range. It is designed to accelerate from the above mill passing speed.
【００１４】また第２及び第４発明法は、上記の両発明
法のうち、特異点或いは溶接点が連続式調質圧延機を通
過した後、圧延荷重或いは張力のうち少なくとも一方を
操作してその目標範囲に到達した後に、所定長さ通過す
るまでの間その状態を継続させてから、伸率制御に切替
えるようにしたものである。In the second and fourth invention methods, among the above two invention methods, at least one of the rolling load and the tension is operated after the singular point or the welding point passes through the continuous temper rolling mill. After reaching the target range, the state is continued until it passes a predetermined length, and then switching to elongation control is performed.
【００１５】[0015]
【作用】ナローラップシーム溶接点のミル通過の場合、
従来技術が減速中或いは加速中に、ミル通過荷重への移
行或いはミル通過荷重から次圧延条件の目標荷重への移
行を行なうのに対し、本発明はライン速度が低速である
ミル通過速度（30〜200mpm）に変更した後該速度で荷重
或いは張力のうち少なくとも一方の変更が行なわれ、そ
の結果、その動作中の金属帯の移動長さが非常に短かく
なる。従って伸率不良の長さが短縮化される。[Operation] When passing the narrow lap seam welding point through the mill,
Whereas the prior art makes a transition to the mill passing load or a transition from the mill passing load to the target load of the next rolling condition during deceleration or acceleration, the present invention has a line passing speed of a low mill passing speed (30 .About.200 mpm) and then at that speed at least one of load or tension is changed, resulting in a very short moving length of the metal strip during its operation. Therefore, the length of poor elongation is shortened.
【００１６】ミル通過荷重へ移行（軽荷重移行）させる
場合における下記表１の条件のもとでの従来技術と本発
明の比較結果を図１２(a)に示す。FIG. 12 (a) shows a comparison result between the prior art and the present invention under the conditions shown in Table 1 below when shifting to a mill passing load (shifting to a light load).
【００１７】[0017]
【表１】 [Table 1]
【００１８】同図によれば軽荷重移行前の荷重が大きな
場合はそれにつれて伸率不良長さの較差が大きくなり、
荷重が1000tonの場合には本発明の伸率不良長さは従来
技術のそれの約５４％程度に減少できる。According to the figure, when the load before the shift to the light load is large, the difference in the length of defective elongation increases accordingly.
When the load is 1000 tons, the elongation failure length of the present invention can be reduced to about 54% of that of the prior art.
【００１９】更にミル通過荷重から次圧延条件の目標荷
重へ移行（目標荷重移行）させる場合における下記表２
の条件のもとでの従来技術と本発明の比較結果を図１２
(b)に 示す。Further, the following Table 2 in the case of shifting from the mill passing load to the target load of the next rolling condition (target load transfer)
FIG. 12 shows a comparison result between the conventional technique and the present invention under the condition of FIG.
It is shown in (b).
【００２０】[0020]
【表２】 [Table 2]
【００２１】同図によれば目標荷重が大きくなるにつれ
て伸率不良長さの較差が大きくなり、目標圧延条件に到
達後、ライン速度を加速する本願第１発明より、目標伸
率範囲到達後にライン速度を加速する本願第３発明の方
がさらに伸率不良長さを低減することが可能となること
もわかる。According to the figure, the range of defective elongation lengths increases as the target load increases, and the line speed is accelerated after the target rolling condition is reached. It is also understood that the third invention of the present application in which the speed is accelerated can further reduce the length of defective elongation.
【００２２】一方、圧延条件の変更される特異点のミル
通過の場合、従来技術がライン速度を減速させることな
く伸率制御を継続させながら次圧延条件へ移行を行なう
のに対し、本発明は十分低速（30〜200mpm）である前述
のミル通過速度にそのライン速度を変更した後、該ライ
ン速度で特異点のミル通過が行なわれ、且つ伸率制御を
一旦中止して荷重或いは張力の少なくとも一方の変更が
行なわれるため、その動作中の金属帯の移動長さが非常
に短かくなる。その結果伸率不良の長さが短かくなる。On the other hand, in the case of passing through a mill at a singular point where the rolling condition is changed, the conventional technique shifts to the next rolling condition while continuing the elongation control without decelerating the line speed. After changing the line speed to the above-mentioned mill passing speed that is sufficiently low speed (30 to 200 mpm), the singular point passes through the mill at the line speed, and the elongation control is temporarily stopped to at least the load or tension. Since one change is made, the moving length of the metal strip during its operation becomes very short. As a result, the length of defective elongation becomes short.
【００２３】加えて、次圧延条件の目標荷重へ移行させ
る場合における下記表３の条件のもとでの従来技術と本
発明の比較結果を図１３に示す。In addition, FIG. 13 shows a comparison result between the prior art and the present invention under the conditions shown in Table 3 below when shifting to the target load of the next rolling condition.
【００２４】[0024]
【表３】 [Table 3]
【００２５】同図によれば前圧延材と次圧延材の荷重変
更量が大きな場合はそれにつれて伸率不良長さの較差が
大きくなり、又目標圧延条件に到達後、ライン速度を加
速する本願第１発明より、目標伸率範囲到達後にライン
速度を加速する本願第３発明の方が更に伸率不良長さを
低減することが可能となっていることがわかる。According to the figure, when the amount of change in load between the pre-rolled material and the next-rolled material is large, the difference in the elongation failure length increases accordingly, and after reaching the target rolling condition, the line speed is accelerated. From the first invention, it is understood that the third invention of the present application in which the line speed is accelerated after reaching the target elongation range can further reduce the elongation defect length.
【００２６】[0026]
【実施例】ナローラップシーム溶接点がミルを通過する
場合の具体的実施例につき、図１乃至図４を使って示
す。EXAMPLE A specific example of the case where a narrow lap seam welding point passes through a mill will be described with reference to FIGS.
【００２７】まず本願第１発明の実施例について図１及
び図２を用いて説明すると、ナローラップシーム溶接点
が、ミル手前（たとえば1m手前）のＢ点に来た時にその
荷重がミル通過荷重となるように、軽荷重移行時間およ
びライン速度の減速時間を考慮してミル前減速開始点Ａ
点の位置を事前に演算する。First, the embodiment of the first invention of the present application will be described with reference to FIGS. 1 and 2. When the narrow lap seam welding point comes to point B before the mill (for example, 1 m before), the load passes through the mill. In consideration of the light load transition time and the line speed deceleration time,
Calculate the position of the point in advance.
【００２８】前記溶接点が該Ａ点を通過すると同時にミ
ル通過速度（後述）を目標にしてライン速度の減速を開
始し、30〜200mpm程度のミル通過速度に到達すると同時
に、伸率制御から軽荷重移行に切替え、該荷重はミル通
過荷重を目標にして下げてゆく。その後ミル通過荷重に
到達すると同時に、一定荷重制御に切替え、ミル通過荷
重を保持して、前記溶接点のミル通過を行なう。At the same time when the welding point passes through the point A, deceleration of the line speed is started aiming at a mill passing speed (described later), and a mill passing speed of about 30 to 200 mpm is reached, and at the same time the elongation control is lightened. Switching to load transfer, the load is lowered with the goal of the mill passing load. After that, at the same time when the mill passing load is reached, the control is switched to constant load control, the mill passing load is maintained, and the mill passes the welding point.
【００２９】溶接点がミル通過後のＣ点（たとえばミル
後1mの位置）を通過すると同時に一定荷重制御から目標
荷重移行に切替え、次圧延条件の目標荷重を目標にして
荷重を上げてゆく。目標荷重に到達後、伸率制御に切替
え、かつライン速度をミル通過速度から目標速度まで加
速することによって達成される。望ましくは、次圧延条
件の荷重および張力の目標範囲に到達後所定長さ通過す
るまでの間、その状態を継続させた後に伸率制御に切替
える第２発明法を採用することにより、伸率制御切替直
後に、伸率不良部分の見かけ上大きな伸率偏差に伴なっ
て発生する伸率のオーバーシュート現象を小さくするこ
とができ、スムーズな伸率制御への移行が達成できる
（図１及び図２は、目標荷重に到達後所定長さ金属帯が
通過するまでの間、目標荷重及び目標張力を保持させた
後に、伸率制御に切り替えた第２発明法の場合について
も記載している）。At the same time when the welding point passes through point C (for example, the position 1 m after the mill) after passing through the mill, the constant load control is switched to the target load shift, and the load is increased with the target load of the next rolling condition as the target. This is achieved by switching to elongation control after reaching the target load and accelerating the line speed from the mill passing speed to the target speed. Desirably, the elongation control is performed by adopting the second invention method in which the state is continued after the target range of the load and tension of the next rolling condition is reached and a predetermined length is passed, and then the elongation control is performed. Immediately after the switching, it is possible to reduce the elongation overshoot phenomenon that occurs with the apparently large elongation deviation of the defective elongation portion, and to achieve a smooth transition to the elongation control (FIG. 1 and FIG. 2 also describes the case of the second invention method in which the target load and the target tension are held until the metal strip passes the predetermined length after the target load is reached, and then the elongation control is performed. .
【００３０】一方、第３発明法の実施例につき、図３及
び図４を用いて説明する。On the other hand, an embodiment of the third invention method will be described with reference to FIGS. 3 and 4.
【００３１】前記溶接点がミル通過し、目標荷重移行で
目標荷重に到達し伸率制御に切替えるまでの操作は、前
実施例の場合と同一の方法を実施する（図３及び図４
は、目標荷重に到達後所定長さ金属帯が通過するまでの
間、目標荷重及び目標張力を保持させた後に、伸率制御
に切り替えた第４発明法の場合についても記載してい
る）。そして伸率制御に切替えた後、伸率が目標伸率範
囲に到達するまでライン速度はミル通過速度を保持さ
せ、該目標伸率範囲に到達すると同時にライン速度を目
標速度まで加速することによって達成される。The same operation as in the case of the previous embodiment is carried out until the welding point passes through the mill, reaches the target load when the target load shifts, and switches to elongation control (FIGS. 3 and 4).
Also describes the case of the fourth invention method in which the target load and the target tension are held until the metal strip passes the predetermined length after the target load is reached, and then the elongation control is switched to). After switching to elongation control, the line speed is kept at the mill passing speed until the elongation reaches the target elongation range, and the line speed is reached to the target speed at the same time when the target elongation range is reached. To be done.
【００３２】一般的に真の目標荷重を正確に推定するこ
とは難しく設定値との誤差は±20％程度有り、これによ
る伸率不良は伸率制御（フィードバック制御）により補
正されるが、この伸率制御においてライン速度に従って
伸率検出のサンプリングピッチ等を変更するような場合
は以上の第２実施例が非常に有効となる。Generally, it is difficult to accurately estimate the true target load, and there is an error of about ± 20% from the set value. The elongation failure due to this is corrected by the elongation control (feedback control). In the elongation control, when the sampling pitch for detecting the elongation is changed according to the line speed, the above second embodiment is very effective.
【００３３】これらに実施例においてはナローラップシ
ーム溶接点を軽荷重にてミル通過させる場合について述
べたが、ブライト調圧において溶接点をミル開放状態に
て（上／下ワークロールのギャップを開けて）通板させ
る場合や、ワークロール組替の場合においても、軽荷重
移行或いは目標荷重移行の方法につき本発明の適用が可
能である。In these examples, the case where the narrow lap seam welding point is passed through the mill with a light load has been described. However, in the bright pressure adjustment, the welding point is opened in the mill (the gap between the upper and lower work rolls is opened). The present invention can be applied to a method of light load transfer or target load transfer even in the case of passing a plate or changing work rolls.
【００３４】更にサイズ、材質、伸率等の圧延条件の変
更される特異点がミルを通過する場合の具体的実施例に
ついて図５乃至図８を使って示す。Further, a concrete example in which a singular point whose rolling conditions such as size, material and elongation are changed passes through the mill will be described with reference to FIGS.
【００３５】まず本願第１発明の２つ目の実施例につい
て図５及び図６を用いて説明すると、特異点がミル手前
Ｂ点でライン速度の減速が完了するように、ライン速度
の減速時間を考慮して、ミル前減速開始点Ａ点の位置を
事前に演算する。First, the second embodiment of the first invention of the present application will be described with reference to FIGS. 5 and 6. In order to complete the line speed deceleration at the singular point B before the mill, the line speed deceleration time is completed. In consideration of the above, the position of the deceleration start point A before the mill is calculated in advance.
【００３６】特異点がこのＡ点を通過すると同時に、ミ
ル通過速度を目標にしてライン速度の減速を開始し、30
〜200mpm程度のミル通過速度に到達すると同時に、伸率
制御から制御切替直前の荷重での一定荷重制御に切替え
る。At the same time when the singular point passes through this point A, the line speed deceleration is started with the target of the mill passing speed.
At the same time as reaching the mill passing speed of about 200 mpm, the elongation control is switched to the constant load control with the load immediately before the control switching.
【００３７】そして特異点がミル後Ｃ点を通過すると同
時に、一定荷重制御から目標荷重移行に切替え、次圧延
条件の目標荷重を目標にして荷重を上げ又は下げてゆ
く。目標荷重に到達後伸率制御に切替え、且つライン速
度をミル通過速度から目標速度まで加速することによっ
て達成される。前述の実施例の場合と同様に、次圧延条
件の目標荷重に到達後、所定長さ通過するまでの間その
状態を継続させた後、伸率制御に切り替える方が望まし
い（図５及び図６は第２発明法の場合についても記載し
ている）。At the same time that the singular point passes through point C after milling, the constant load control is switched to the target load shift, and the load is increased or decreased with the target load of the next rolling condition as the target. This is achieved by switching to elongation control after reaching the target load and accelerating the line speed from the mill passing speed to the target speed. As in the case of the above-described embodiment, it is preferable that after the target load of the next rolling condition is reached and the state is continued for a predetermined length, the state is continued and then the elongation control is switched to (Figs. 5 and 6). Also describes the case of the second invention method).
【００３８】更に本願第３発明の２つ目の実施例につい
て図７及び図８を用いて説明する。Further, a second embodiment of the third invention of the present application will be described with reference to FIGS. 7 and 8.
【００３９】前記特異点がミルを通過し、目標荷重移行
で目標荷重に到達し伸率制御に切替えるまでの操作は前
記実施例と同一の方法を実施する（図７及び図８は、目
標荷重に到達後所定長さ金属帯が通過するまでの間、目
標荷重及び目標張力を保持させた後に、伸率制御に切り
替えた第４発明法の場合についても記載している）。そ
して伸率制御に切替えた後、伸率が目標伸率範囲に到達
するまでライン速度はミル通過速度を保持させ、該目標
伸率範囲に到達すると同時にライン速度を目標速度まで
加速することによって達成される。The operation until the singular point passes through the mill, reaches the target load at the target load transfer, and switches to elongation control is carried out in the same manner as in the above embodiment (see FIGS. 7 and 8 for the target load). It also describes the case of the fourth invention method in which the target load and the target tension are held until the metal strip passes a predetermined length after reaching the above condition (4), and then the elongation control is performed. After switching to elongation control, the line speed is kept at the mill passing speed until the elongation reaches the target elongation range, and the line speed is reached to the target speed at the same time when the target elongation range is reached. To be done.
【００４０】前記第２実施例と同様にライン速度に従っ
て伸率検出のサンプリングピッチ等を変更するような場
合はこの第４実施例が非常に有効となる。As in the case of the second embodiment, the fourth embodiment is very effective in the case of changing the sampling pitch for detecting elongation according to the line speed.
【００４１】尚、第１乃至第８の実施例共、張力の変更
がない場合を記載したが、張力のみ或いは荷重と張力両
方を操作する場合においても同様な方法で実施すること
が出来ることは言うまでもない。In each of the first to eighth embodiments, the case where the tension is not changed has been described, but the same method can be applied to the case where only the tension is applied or when both the load and the tension are operated. Needless to say.
【００４２】前述したミル通過速度について固定値を用
いても良いが、サイズ、材質、伸率、調質圧延方法（湿
式、乾式）、表面仕上等により変更する方がより好まし
い。その理由を以下に説明すると、圧延速度、即ちライ
ン速度により、材料の変形抵抗やワークロールと板間の
摩擦係数が変化するため、ミル通過速度により圧延荷重
が図９のように変化する。従って材料に対して要求され
る最小圧延圧力から求まる最小圧延荷重、若しくはスリ
ップ防止の操業制約や圧延機能力から定まる最小圧延荷
重以上の圧延荷重を確保可能なミル通過速度を選定すべ
きである。この場合図１０のように、予め定めたテーブ
ル等からミル通過速度を求めても良いし、圧延荷重予測
モデル式を用い、図１１のようにミル通過速度を求める
ことも可能である。A fixed value may be used for the above-mentioned mill passing speed, but it is more preferable to change it according to the size, material, elongation, temper rolling method (wet or dry type), surface finish and the like. The reason will be described below. Since the deformation resistance of the material and the coefficient of friction between the work roll and the plate change depending on the rolling speed, that is, the line speed, the rolling load changes as shown in FIG. 9 depending on the mill passing speed. Therefore, it is necessary to select a mill passing speed that can secure a minimum rolling load determined from the minimum rolling pressure required for the material, or a rolling load that is equal to or more than the minimum rolling load determined by the operational constraint of slip prevention and rolling functional force. In this case, as shown in FIG. 10, the mill passing speed may be obtained from a predetermined table or the like, or the mill passing speed may be obtained as shown in FIG. 11 using the rolling load prediction model formula.
【００４３】[0043]
【発明の効果】以上詳述した様に本発明法によれば、金
属帯のナローラップシーム溶接点や圧延条件変更に係る
特異点の調質圧延機通過に伴なう伸率不良の長さが低減
でき、製品の歩留を向上させることが出来る。As described in detail above, according to the method of the present invention, the length of the elongation failure due to the passage of the narrow lap seam welding point of the metal strip and the singular point relating to the change of the rolling conditions with the passage of the temper rolling mill. Can be reduced and the product yield can be improved.
【図１】第１発明に係る調質圧延方法の実施例工程を示
す説明図である。FIG. 1 is an explanatory view showing an embodiment process of a temper rolling method according to a first invention.
【図２】そのフローチャート図である。FIG. 2 is a flow chart diagram thereof.
【図３】第３発明に係る調質圧延方法の実施例工程を示
す説明図である。FIG. 3 is an explanatory view showing an embodiment process of the temper rolling method according to the third invention.
【図４】そのフローチャート図である。FIG. 4 is a flow chart diagram thereof.
【図５】第１発明に係る調質圧延方法の２つ目の実施例
工程を示す説明図である。FIG. 5 is an explanatory view showing a second embodiment process of the temper rolling method according to the first invention.
【図６】そのフローチャート図である。FIG. 6 is a flow chart diagram thereof.
【図７】第３発明に係る調質圧延方法の２つ目の実施例
工程を示す説明図である。FIG. 7 is an explanatory view showing a second embodiment process of the temper rolling method according to the third invention.
【図８】そのフローチャート図である。FIG. 8 is a flow chart diagram thereof.
【図９】調質圧延方式別のミル通過速度と圧延荷重との
関係を示すグラフである。FIG. 9 is a graph showing the relationship between mill passing speed and rolling load for each temper rolling system.
【図１０】ミル通過速度を求めるための予め定められた
テーブルの一例を示す説明図である。FIG. 10 is an explanatory diagram showing an example of a predetermined table for obtaining a mill passing speed.
【図１１】ミル通過速度演算用のフローチャートを示す
説明図である。FIG. 11 is an explanatory diagram showing a flowchart for calculating a mill passing speed.
【図１２】ミル通過荷重へ移行させる場合及びミル通過
荷重から次圧延条件の目標荷重へ移行させる場合におけ
る従来技術と本発明との伸率不良長さの比較結果を示す
グラフである。FIG. 12 is a graph showing the results of comparison of the elongation failure length between the conventional technology and the present invention when shifting to the mill passing load and when shifting from the mill passing load to the target load of the next rolling condition.
【図１３】次圧延条件の目標荷重へ移行させる場合にお
ける従来技術と本発明との伸率不良長さの比較結果を示
すグラフである。FIG. 13 is a graph showing a comparison result of elongation failure length between the conventional technique and the present invention when shifting to the target load of the next rolling condition.
【図１４】ナローラップシーム溶接点のミル通過時にお
ける圧延制御変更の工程説明図である。FIG. 14 is a process explanatory diagram of rolling control change when the narrow lap seam welding point passes through the mill.
【図１５】圧延条件の変更される特異点のミル通過時に
おける圧延制御変更の工程説明図である。FIG. 15 is a process explanatory diagram of rolling control change when a singular point whose rolling condition is changed passes through a mill.
Claims (4)
件の変更される特異点或いはナローラップシーム溶接点
が連続式調質圧延機を通過する直前までにライン速度を
ミル通過速度に減速させ、該ミル通過速度に到達した後
そのライン速度を保持すると共に、伸率制御から一定荷
重制御に切替え、上記特異点或いは溶接点が該圧延機を
通過した後、圧延荷重或いは張力のうち少なくとも一方
を操作し、その目標範囲に到達後伸率制御に切替えると
共に、上記ミル通過速度から加速することを特徴とする
調質圧延方法。1. A line speed is set to a mill passing speed immediately before a singular point or a narrow lap seam welding point where the rolling conditions such as the size, material and elongation of a metal strip are changed, passing through a continuous temper rolling mill. After decelerating and maintaining the line speed after reaching the mill passing speed, switching from elongation control to constant load control, after the singular point or welding point passes through the rolling mill, A temper rolling method, characterized in that at least one of them is operated to switch to elongation control after reaching a target range and to accelerate from the mill passing speed.
件の変更される特異点或いはナローラップシーム溶接点
が連続式調質圧延機を通過する直前までにライン速度を
ミル通過速度に減速させ、該ミル通過速度に到達した後
そのライン速度を保持すると共に、伸率制御から一定荷
重制御に切替え、上記特異点或いは溶接点が該圧延機を
通過し、圧延荷重或いは張力のうち少なくとも一方を操
作してその目標範囲に到達した後に、所定長さ通過する
までの間その状態を継続させてから、伸率制御に切替え
ると共に、上記ミル通過速度から加速することを特徴と
する調質圧延方法。2. The line speed is set to the mill passing speed just before the singular point or narrow lap seam welding point where the rolling conditions such as the size, material and elongation of the metal strip are changed passes through the continuous temper rolling mill. After decelerating and maintaining the line speed after reaching the mill passing speed, switching from elongation control to constant load control, the singular point or welding point passes through the rolling mill, and at least rolling load or tension After operating one of them to reach the target range, the state is maintained until it passes a predetermined length, then switching to elongation control and accelerating from the mill passing speed. Rolling method.
件の変更される特異点或いはナローラップシーム溶接点
が連続式調質圧延機を通過する直前までにライン速度を
ミル通過速度に減速させ、該ミル通過速度に到達した後
そのライン速度を保持すると共に、伸率制御から一定荷
重制御に切替え、上記特異点或いは溶接点が該圧延機を
通過した後、圧延荷重或いは張力のうち少なくとも一方
を操作し、その目標範囲に到達後伸率制御に切替え、更
に所定の伸率範囲に到達した後に上記ミル通過速度から
加速することを特徴とする調質圧延方法。3. The line speed is set to the mill passing speed immediately before the singular point or narrow lap seam welding point where the rolling conditions such as the size, material and elongation of the metal strip are changed passes through the continuous temper rolling mill. After decelerating and maintaining the line speed after reaching the mill passing speed, switching from elongation control to constant load control, after the singular point or welding point passes through the rolling mill, A temper rolling method, characterized in that at least one of them is operated to switch to elongation control after reaching the target range, and further accelerated from the mill passing speed after reaching a predetermined elongation range.
件の変更される特異点或いはナローラップシーム溶接点
が連続式調質圧延機を通過する直前までにライン速度を
ミル通過速度に減速させ、該ミル通過速度に到達した後
そのライン速度を保持すると共に、伸率制御から一定荷
重制御に切替え、上記特異点或いは溶接点が該圧延機を
通過した後、圧延荷重或いは張力のうち少なくとも一方
を操作してその目標範囲に到達した後に、所定長さ通過
するまでの間その状態を継続させてから伸率制御に切替
え、更に所定の伸率範囲に到達した後に上記ミル通過速
度から加速することを特徴とする調質圧延方法。4. The line speed is set to the mill passing speed immediately before the singular point or narrow lap seam welding point where the rolling conditions such as the size, material and elongation of the metal strip are changed passes through the continuous temper rolling mill. After decelerating and maintaining the line speed after reaching the mill passing speed, switching from elongation control to constant load control, after the singular point or welding point passes through the rolling mill, After operating at least one of them to reach its target range, continue that state until it passes a predetermined length and then switch to elongation control, and after reaching the predetermined elongation range, from the mill passing speed A temper rolling method characterized by accelerating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5243524A JP2748831B2 (en) | 1992-09-11 | 1993-09-06 | Temper rolling method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-267881 | 1992-09-11 | ||
| JP26788192 | 1992-09-11 | ||
| JP5243524A JP2748831B2 (en) | 1992-09-11 | 1993-09-06 | Temper rolling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06190422A true JPH06190422A (en) | 1994-07-12 |
| JP2748831B2 JP2748831B2 (en) | 1998-05-13 |
Family
ID=26536300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5243524A Expired - Fee Related JP2748831B2 (en) | 1992-09-11 | 1993-09-06 | Temper rolling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2748831B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002282922A (en) * | 2001-03-22 | 2002-10-02 | Nippon Steel Corp | Extension ratio control method for continuous temper rolling mill |
| KR100518335B1 (en) * | 2003-07-16 | 2005-10-04 | 주식회사 포스코 | An apparatus for controlling roll force and line speed in strip welding zone |
| JP2007196271A (en) * | 2006-01-27 | 2007-08-09 | Nippon Steel Corp | Method for suppressing variation of thickness in secondary cold-rolling mill |
| JP2007229790A (en) * | 2006-03-03 | 2007-09-13 | Nippon Steel Corp | Method for passing welded point in secondary cold-rolling mill on outlet side of continuous annealing furnace |
| KR100786470B1 (en) * | 2001-12-20 | 2007-12-17 | 주식회사 포스코 | System for shape control of skin pass mill in continous anealing line |
| CN104107837A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method for accurately controlling band-steel ductility when welding joints pass leveling machine |
| CN110227724A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of weld seam crosses the parameter control method of six roller Cold-Rolled Strip Temper Mill of continuous annealing |
| CN110227723A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of parameter control method of six roller Cold-Rolled Strip Temper Mill initial segment of continuous annealing |
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-
1993
- 1993-09-06 JP JP5243524A patent/JP2748831B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002282922A (en) * | 2001-03-22 | 2002-10-02 | Nippon Steel Corp | Extension ratio control method for continuous temper rolling mill |
| KR100786470B1 (en) * | 2001-12-20 | 2007-12-17 | 주식회사 포스코 | System for shape control of skin pass mill in continous anealing line |
| KR100518335B1 (en) * | 2003-07-16 | 2005-10-04 | 주식회사 포스코 | An apparatus for controlling roll force and line speed in strip welding zone |
| JP2007196271A (en) * | 2006-01-27 | 2007-08-09 | Nippon Steel Corp | Method for suppressing variation of thickness in secondary cold-rolling mill |
| JP4648842B2 (en) * | 2006-01-27 | 2011-03-09 | 新日本製鐵株式会社 | Method for suppressing sheet thickness fluctuation in secondary cold rolling mill |
| JP2007229790A (en) * | 2006-03-03 | 2007-09-13 | Nippon Steel Corp | Method for passing welded point in secondary cold-rolling mill on outlet side of continuous annealing furnace |
| JP4551345B2 (en) * | 2006-03-03 | 2010-09-29 | 新日本製鐵株式会社 | Welding point passing method in secondary cold rolling mill on the outgoing side of continuous annealing furnace |
| CN104107837A (en) * | 2013-04-19 | 2014-10-22 | 宝山钢铁股份有限公司 | Method for accurately controlling band-steel ductility when welding joints pass leveling machine |
| CN110227724A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of weld seam crosses the parameter control method of six roller Cold-Rolled Strip Temper Mill of continuous annealing |
| CN110227723A (en) * | 2019-06-09 | 2019-09-13 | 宝钢湛江钢铁有限公司 | A kind of parameter control method of six roller Cold-Rolled Strip Temper Mill initial segment of continuous annealing |
| EP4241897A4 (en) * | 2020-11-04 | 2024-03-20 | Nippon Steel Corp | Rolling control device, rolling control method, and program |
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| Publication number | Publication date |
|---|---|
| JP2748831B2 (en) | 1998-05-13 |
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