JPH07116721A - Method for controlling elongation percentage in skin pass rolling - Google Patents

Method for controlling elongation percentage in skin pass rolling

Info

Publication number
JPH07116721A
JPH07116721A JP5268831A JP26883193A JPH07116721A JP H07116721 A JPH07116721 A JP H07116721A JP 5268831 A JP5268831 A JP 5268831A JP 26883193 A JP26883193 A JP 26883193A JP H07116721 A JPH07116721 A JP H07116721A
Authority
JP
Japan
Prior art keywords
tension
mill
skin pass
lower limit
pass mill
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.)
Granted
Application number
JP5268831A
Other languages
Japanese (ja)
Other versions
JP3167067B2 (en
Inventor
Masahiro Kaneo
昌宏 兼尾
Yoshizo Ishikawa
好蔵 石川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP26883193A priority Critical patent/JP3167067B2/en
Publication of JPH07116721A publication Critical patent/JPH07116721A/en
Application granted granted Critical
Publication of JP3167067B2 publication Critical patent/JP3167067B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE:To control the rolling load of a mill to be almost constant by changing the rolling load of the mill and the reference of the outlet side tension in the mill only when the tension difference of a steel strip between inlet and outlet sides exceeds a prescribed upper/lower limit value in a skin pass mill. CONSTITUTION:The rolling load of a skin pass mill 3 is controlled to be constant. The tension of a steel strip 1 is detected by tension detecting units 11, 15 on the inlet and outlet sides of the mill 3. The difference between the both of tension is compared by an operator CD4, and the tension deviation DELTAepsilon is compared with the tension difference upper/lower limit value + or -x, and upper upper/lower lower limit value + or -y. When the deviation lies within the range of + or -x, the rolling load of the mill 3 is not changed and kept constant. When the deviation exceeds the upper/lower limit value + or -x, the rolling load of the mill 3 is changed, and controlled so that the elongation percentage in a tension leveler 4 is made constant. However, the tension deviation DELTAepsilon still exceeds the upper upper/lower lower limit value + or -y, the reference of tension on the outlet side of the mill 3 is changed. Therefore, the quality and yield of a product are improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、調質圧延における伸率
制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling elongation in temper rolling.

【0002】[0002]

【従来の技術】従来の調質圧延設備においては、図3に
示すように、圧延される鋼帯1が入側の伸率ブライドル
ロール2よりスキンパスミル3、テンションレベラ4を
通過して出側の主ブライドルロール5へと進行する。伸
率ブライドルロール2と主ブライドルロール5はわずか
の回転差をもって運転されるため、その制御がし易いよ
うに2組の差動歯車6a,6bによりメカニカルタイト
に連係されている。
2. Description of the Related Art In a conventional temper rolling equipment, as shown in FIG. 3, a steel strip 1 to be rolled passes through a skin bristle roll 2 on the inlet side, passes a skin pass mill 3 and a tension leveler 4, and exits on the outlet side. Progress to Lord Bridle Roll 5. Since the elongation bridle roll 2 and the main bridle roll 5 are operated with a slight rotation difference, they are linked to the mechanical tight by two sets of differential gears 6a and 6b so as to facilitate their control.

【0003】伸率ブライドルロール2は差動歯車6aに
連結されている伸率ブライドルロール駆動モータ7によ
って運転され、その回転数は伸率設定器8から与えられ
る伸率設定値になるよう伸率−速度変換器9および伸率
ブライドルロール制御器10により制御され、鋼帯1の伸
率が一定に保たれる。なお、入側における鋼帯1の張力
は張力検出器11によって検出される。
The elongation bridle roll 2 is driven by an elongation bridle roll drive motor 7 which is connected to a differential gear 6a, and its rotational speed is adjusted so as to reach an elongation set value given by an elongation setter 8. The elongation of the steel strip 1 is kept constant, controlled by the speed converter 9 and the elongation bridle roll controller 10. The tension of the steel strip 1 on the entry side is detected by the tension detector 11.

【0004】一方、主ブライドルロール5は差動歯車6
bに連結されている主ブライドルロール駆動モータ12に
よって運転され、その回転数は速度設定器13から与えら
れる速度設定値になるよう主ブライドルロール制御器14
により制御される。なお、出側における鋼帯1の張力は
張力検出器15によって検出される。また、スキンパスミ
ル3の圧延荷重はロードセル16で検出され、圧延荷重設
定器17から与えられる圧延荷重設定値と演算子CD1 で比
較されて、その差がなくなるようにスキンパスミル圧下
制御装置18を介して油圧シリンダ19が操作される。
On the other hand, the main bridle roll 5 has a differential gear 6
It is driven by the main bridle roll drive motor 12 connected to b, and its rotation speed is adjusted to the speed set value given from the speed setter 13 by the main bridle roll controller 14
Controlled by. The tension of the steel strip 1 on the delivery side is detected by the tension detector 15. Further, the rolling load of the skin pass mill 3 is detected by the load cell 16, and compared with the rolling load set value given from the rolling load setter 17 by the operator CD 1 , and the skin pass mill reduction controller 18 is set so as to eliminate the difference. The hydraulic cylinder 19 is operated via this.

【0005】さらに、スキンパスミル3の出側張力は出
側張力設定器20からの出側張力設定値と張力検出器15の
検出値が演算子CD2 で比較され、その差ΔTを張力−速
度変換器21により速度に変換して演算子CD3 において速
度設定器13で与えられる速度設定値を加え、スキンパス
ミル速度制御器22によってスキンパスミル駆動モータ23
の回転速度を変更する。これによって、出側張力が一定
に制御される。
Further, as for the outlet side tension of the skin pass mill 3, the outlet side tension set value from the outlet side tension setter 20 and the detected value of the tension detector 15 are compared by an operator CD 2 , and the difference ΔT is set to the tension-speed. A converter 21 converts the speed into a speed and adds the speed set value given by the speed setter 13 in the operator CD 3 , and the skin pass mill speed controller 22 causes a skin pass mill drive motor
Change the rotation speed of. As a result, the output tension is controlled to be constant.

【0006】ところで、スキンパスミル3の入側と出側
には種々の原因により張力の変動が生じるが、このよう
な張力変動に対処するために、たとえば特開昭62−2755
14号公報に開示されているように、スキンパスミルの速
度変化に対応するミル圧延荷重の補正量をあらかじめ定
めておき、速度変化発生と同時にミル圧延荷重を補正
し、入出側張力を安定に保ちながら伸率を一定にする方
法が提案されている。
By the way, tension fluctuations occur on the inlet side and the outlet side of the skin pass mill 3 due to various causes. To cope with such tension fluctuations, for example, JP-A-62-1755.
As disclosed in Japanese Patent Publication No. 14, a correction amount of the mill rolling load corresponding to the speed change of the skin pass mill is set in advance, the mill rolling load is corrected at the same time when the speed change occurs, and the tension on the inlet and outlet sides is kept stable. However, a method of keeping the elongation constant is proposed.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、上記し
た特開昭62−275514号の方法では、ライン速度に対する
補正とスキンパスミル入側の張力変動に対してミル圧延
荷重を変更するため、圧延される鋼帯の形状が悪化する
などの問題が発生する。また、スキンパスミル圧延荷重
を一定圧に制御すると、伸率制御時は張力一定制御がで
きなくなり、スキンパスミル入出側の張力差が大となっ
て操業上のトラブルやスキンパスミル駆動モータの過負
荷の原因となる恐れがある。
However, in the method disclosed in Japanese Patent Laid-Open No. 62-275514 described above, rolling is performed in order to correct the line speed and to change the mill rolling load with respect to the tension variation on the entry side of the skin pass mill. Problems such as deterioration of the shape of the steel strip occur. Also, if the skin-pass mill rolling load is controlled to a constant pressure, constant tension control cannot be performed during elongation control, and the difference in tension between the skin-pass mill inlet and outlet sides becomes large, causing operational problems and overload of the skin-pass mill drive motor. It may cause the problem.

【0008】本発明は、上記のような従来の技術が有す
る課題を解決した調質圧延における伸率制御方法を提供
することを目的とする。
It is an object of the present invention to provide a method for controlling elongation in temper rolling, which solves the problems of the above-mentioned conventional techniques.

【0009】[0009]

【課題を解決するための手段】本発明は、スキンパスミ
ルの入出側に配置した伸率ブライドルロールと主ブライ
ドルロールとを差動歯車を介してメカニカルタイトに連
係し、前記伸率ブライドルロールと主ブライドルロール
に一定の速度差をつけて鋼帯の伸率制御を行うに際し、
スキンパスミルの圧延荷重を一定圧に制御するとともに
スキンパスミル速度をミル出側張力変動が小さくなるよ
うに制御し、スキンパスミルの入出側の鋼帯の張力差が
所定の上・下限値を超えたときはスキンパスミルの圧延
荷重を変更し、さらに該張力差が所定の上・下限値を超
えたときはスキンパスミル出側張力基準を変更して、前
記張力差を所定の範囲内に保つようにしたことを特徴と
する調質圧延における伸率制御方法である。
SUMMARY OF THE INVENTION According to the present invention, an elongation bridle roll and a main bridle roll, which are arranged on the inlet and outlet sides of a skin pass mill, are linked to a mechanical tight through a differential gear, and the elongation bridle roll and the main bridle roll are connected to each other. When controlling the elongation of the steel strip with a certain speed difference on the bridle roll,
The rolling load of the skin pass mill was controlled to a constant pressure and the speed of the skin pass mill was controlled so that the fluctuation of tension on the outlet side of the mill was small, and the tension difference between the steel strips on the inlet and outlet sides of the skin pass mill exceeded the prescribed upper and lower limit values. In this case, the rolling load of the skin pass mill is changed, and when the tension difference exceeds a predetermined upper / lower limit value, the skin pass mill exit side tension standard is changed to keep the tension difference within a predetermined range. This is a method for controlling the elongation in temper rolling.

【0010】[0010]

【作 用】本発明によれば、スキンパスミル入出側張力
差が所定の上・下限値を超えたときにいったんスキンパ
スミルの圧延荷重を変更し、さらに該張力差が大きくな
って所定の上上・下下限値を超えた場合にはスキンパス
ミル出側基準をスキンパスミル入側張力値に対して一定
範囲内に保つように変更するようにしたので、スキンパ
スミルの圧延荷重をほぼ一定に制御することができる。
[Operation] According to the present invention, when the skin pass mill inlet / outlet side tension difference exceeds a predetermined upper / lower limit value, the rolling load of the skin pass mill is temporarily changed, and the tension difference is increased to a predetermined upper / lower limit.・ If the lower limit value is exceeded, the skin pass mill exit side reference is changed to keep it within a certain range with respect to the skin pass mill entrance side tension value, so the rolling load of the skin pass mill is controlled to be almost constant. be able to.

【0011】[0011]

【実施例】以下に、本発明の実施例について、図面を参
照して詳しく説明する。図1は本発明に用いられる調質
圧延制御装置の概要図であり、従来例と同一部材は同一
符号を付して説明を省略する。図に示すように、張力検
出器11で検出された入側における鋼帯1の張力と出側張
力検出器15からの出側張力検出値とを演算子CD4 で比較
し、その張力偏差Δε(ton) が上下限比較器24にあらか
じめ設定された張力差上・下限値±x(ton) および上上
・下下限値±y(ton) と比較され、その結果によって演
算子CD1 または演算子CD2 に出力される。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view of a temper rolling control device used in the present invention. The same members as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. As shown in the figure, the tension of the steel strip 1 on the inlet side detected by the tension detector 11 and the outlet tension detection value from the outlet tension detector 15 are compared by the operator CD 4 , and the tension deviation Δε (ton) is compared with the tension difference upper / lower limit value ± x (ton) and upper / lower lower limit value ± y (ton) preset in the upper / lower limit comparator 24, and the operator CD 1 or operation is performed depending on the result. Output to child CD 2 .

【0012】これらの張力差上・下限値±xおよび上上
・下下限値±yは、それぞれ伸率eと塑性定数Qの微分
値∂e/∂Qの値によって求めたもので、図2に示すよ
うな関係に自動設定される。ここで、鋼板の伸び率の公
差によって鋼板にかけ得る張力の上下限値±xが決ま
る。また、張力が変化することにより、塑性定数が変化
し、圧延後の板厚が変動する。つまり上下限値±xは鋼
板の伸び率公差、板厚公差の範囲を越えないように、張
力の変更が可能な値に設定する。上上・下下限値±yに
ついてはミルロールの駆動モータが過負荷とならない値
とする。
The upper and lower limit values ± x and the upper and lower limit values ± y of these tension differences are obtained by the values of the elongation e and the differential value ∂e / ∂Q of the plastic constant Q, respectively. The relationship is automatically set as shown in. Here, the upper and lower limit value ± x of the tension that can be applied to the steel sheet is determined by the tolerance of the elongation rate of the steel sheet. Moreover, the plastic constant changes due to the change in tension, and the plate thickness after rolling also changes. That is, the upper and lower limits ± x are set to values that allow the tension to be changed so as not to exceed the ranges of the elongation tolerance and the thickness tolerance of the steel sheet. The upper and lower limit values ± y shall be values that do not cause overload on the mill roll drive motor.

【0013】そこで、張力偏差Δεが±xを超えた場合
はいったん演算子CD1 で演算し、その結果によってスキ
ンパスミル3の圧延荷重を変更し、テンションレベラ4
での伸率を一定になるように制御する。それでも、なお
かつ張力偏差Δεが±yを超えた場合には、演算子CD2
で演算し、スキンパスミル駆動モータ23の回転速度を変
更して、出側張力基準をその張力差が±y内に保たれる
ように変更する。
Therefore, when the tension deviation Δε exceeds ± x, it is once calculated by the operator CD 1 , the rolling load of the skin pass mill 3 is changed according to the result, and the tension leveler 4 is changed.
The growth rate at is controlled to be constant. Nevertheless, if the tension deviation Δε exceeds ± y, the operator CD 2
Then, the rotation speed of the skin pass mill drive motor 23 is changed to change the output side tension reference so that the tension difference is maintained within ± y.

【0014】これによって、スキンパスミルの圧延荷重
をほぼ一定に制御することができ、伸率一定でかつ形状
不良の少ない鋼帯を調質圧延することが可能となる。
As a result, the rolling load of the skin pass mill can be controlled to be substantially constant, and it becomes possible to temper-roll a steel strip having a constant elongation and few shape defects.

【0015】[0015]

【発明の効果】以上説明したように、本発明によれば、
スキンパスミル入出側張力差が所定の上・下限値を超え
たときにいったんスキンパスミルの圧延荷重を変更し、
さらに該張力差が大きくなって所定の上上・下下限値を
超えた場合にはスキンパスミル出側基準をスキンパスミ
ル入側張力値に対して一定範囲内に保つように変更する
ようにしたので、スキンパスミルの圧延荷重をほぼ一定
に制御することができ、製品の品質・歩留りの向上に寄
与することが可能となる。
As described above, according to the present invention,
When the difference between the tensions on the inlet and outlet sides of the skin pass mill exceeds the specified upper and lower limits, the rolling load of the skin pass mill is changed once,
Further, when the tension difference becomes large and exceeds the predetermined upper and lower limit values, the skin pass mill outlet side reference is changed so as to be kept within a certain range with respect to the skin pass mill inlet side tension value. In addition, the rolling load of the skin pass mill can be controlled to be almost constant, which can contribute to the improvement of product quality and yield.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に用いられる調質圧延制御装置の概要図
である。
FIG. 1 is a schematic diagram of a temper rolling control device used in the present invention.

【図2】張力差上下限値の関係を説明する図である。FIG. 2 is a diagram illustrating a relationship between upper and lower limits of tension difference.

【図3】調質圧延制御装置の従来例の概要図である。FIG. 3 is a schematic diagram of a conventional example of a temper rolling control device.

【符号の説明】[Explanation of symbols]

1 鋼帯 2 伸率ブライドルロール 3 スキンパスミル 4 テンションレベラ 5 主ブライドルロール 6a,6b 差動歯車 7 伸率ブライドルロール駆動モータ 8 伸率設定器 9 伸率−速度変換器 10 伸率ブライドルロール制御器 11,15 張力検出器 12 主ブライドルロール駆動モータ 13 速度設定器 14 主ブライドルロール制御器 16 ロードセル 17 圧延荷重設定器 18 スキンパスミル圧下制御装置 19 油圧シリンダ 20 出側張力設定器 21 張力−速度変換器 22 スキンパスミル速度制御器 23 スキンパスミル駆動モータ 24 上下限比較器 CD1 ,CD2 ,CD3 ,CD4 演算子1 Steel strip 2 Elongation bridle roll 3 Skin pass mill 4 Tension leveler 5 Main bridle roll 6a, 6b Differential gear 7 Elongation bridle roll drive motor 8 Elongation setter 9 Elongation-speed converter 10 Elongation bridle roll controller 11, 15 Tension detector 12 Main bridle roll drive motor 13 Speed setter 14 Main bridle roll controller 16 Load cell 17 Rolling load setter 18 Skin pass mill reduction controller 19 Hydraulic cylinder 20 Outlet side tension setter 21 Tension-speed converter 22 Skin pass mill speed controller 23 Skin pass mill drive motor 24 Upper and lower limit comparator CD 1 , CD 2 , CD 3 , CD 4 operator

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 スキンパスミルの入出側に配置した伸
率ブライドルロールと主ブライドルロールとを差動歯車
を介してメカニカルタイトに連係し、前記伸率ブライド
ルロールと主ブライドルロールに一定の速度差をつけて
鋼帯の伸率制御を行うに際し、スキンパスミルの圧延荷
重を一定圧に制御するとともにスキンパスミル速度をミ
ル出側張力変動が小さくなるように制御し、スキンパス
ミルの入出側の鋼帯の張力差が所定の上・下限値を超え
たときはスキンパスミルの圧延荷重を変更し、さらに該
張力差が所定の上・下限値を超えたときはスキンパスミ
ル出側張力基準を変更して、前記張力差を所定の範囲内
に保つようにしたことを特徴とする調質圧延における伸
率制御方法。
1. An elongation bridle roll and a main bridle roll, which are arranged on the inlet and outlet sides of a skin pass mill, are linked to a mechanical tight through a differential gear, and a constant speed difference is applied to the elongation bridle roll and the main bridle roll. When controlling the elongation of the steel strip by attaching it, the rolling load of the skin pass mill is controlled to a constant pressure and the skin pass mill speed is controlled so that the fluctuation of tension on the mill exit side is reduced, and When the tension difference exceeds the predetermined upper and lower limit values, the rolling load of the skin pass mill is changed, and when the tension difference exceeds the predetermined upper and lower limit values, the skin pass mill exit side tension standard is changed, A method of controlling elongation in temper rolling, characterized in that the difference in tension is kept within a predetermined range.
JP26883193A 1993-10-27 1993-10-27 Elongation control method in temper rolling Expired - Fee Related JP3167067B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26883193A JP3167067B2 (en) 1993-10-27 1993-10-27 Elongation control method in temper rolling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26883193A JP3167067B2 (en) 1993-10-27 1993-10-27 Elongation control method in temper rolling

Publications (2)

Publication Number Publication Date
JPH07116721A true JPH07116721A (en) 1995-05-09
JP3167067B2 JP3167067B2 (en) 2001-05-14

Family

ID=17463871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26883193A Expired - Fee Related JP3167067B2 (en) 1993-10-27 1993-10-27 Elongation control method in temper rolling

Country Status (1)

Country Link
JP (1) JP3167067B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558787B1 (en) * 2001-12-22 2006-03-10 주식회사 포스코 Elongation control method of steel strip at the temper pass mill
KR100985280B1 (en) * 2003-08-21 2010-10-04 주식회사 포스코 A method for controlling the elongation of skin pass mill in continuous annealing line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100558787B1 (en) * 2001-12-22 2006-03-10 주식회사 포스코 Elongation control method of steel strip at the temper pass mill
KR100985280B1 (en) * 2003-08-21 2010-10-04 주식회사 포스코 A method for controlling the elongation of skin pass mill in continuous annealing line

Also Published As

Publication number Publication date
JP3167067B2 (en) 2001-05-14

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