JPS59174206A - Set-up device of rolling mill - Google Patents
Set-up device of rolling millInfo
- Publication number
- JPS59174206A JPS59174206A JP58048875A JP4887583A JPS59174206A JP S59174206 A JPS59174206 A JP S59174206A JP 58048875 A JP58048875 A JP 58048875A JP 4887583 A JP4887583 A JP 4887583A JP S59174206 A JPS59174206 A JP S59174206A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- calculating
- oil
- mill
- load
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/22—Pass schedule
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は連続圧延機に係す、特に、熱間圧延機の油圧延
のセットアツプ方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a continuous rolling mill, and particularly to a method for setting up hydraulic rolling in a hot rolling mill.
近年、熱間圧延でも、圧延中に油?使用することが多く
なった。この主な理由は、圧延荷重を低下できるための
省エネルギー化が図れること、ロール表面の亀裂または
肌荒れ?防ぐため、ロール組替頻度と改削量の減少によ
り圧延作業の生産性向上と原価低減を図ること、表面の
良好な被圧延材を得ること、ロールの冷却効果ケ高める
こと等がめる。ただ、圧延油をかけることにより、圧延
素材のスリップ現象が発生する。このスリップ現象は、
圧延素材が各スタンドにかみ込む前に、圧延油全使用す
るときに特に顯著であるため、圧延油は通常材料が各ス
タンドにかみ込まれて後、初めて適用される。ところが
圧延途中に油をかけることにより、摩擦係数が少なくな
り、圧延荷重が急激に減少し、被圧延材の板厚と張力に
大幅な変化が起こる。このため、被圧延材を目的の仕様
に圧延することが困難となる。In recent years, even in hot rolling, oil is released during rolling. used more often. The main reasons for this are that energy can be saved by reducing the rolling load, and that the roll surface is cracked or rough. In order to prevent this, efforts are being made to improve the productivity of rolling operations and reduce costs by reducing the frequency of roll replacement and the amount of rework, obtaining rolled materials with good surfaces, and increasing the cooling effect of the rolls. However, applying rolling oil causes slipping of the rolled material. This slip phenomenon is
Rolling oil is usually applied only after the material has been loaded into each stand, as this is especially true when all of the rolling oil is used before the rolling stock is loaded into each stand. However, by applying oil during rolling, the friction coefficient decreases, the rolling load sharply decreases, and the thickness and tension of the rolled material change significantly. For this reason, it becomes difficult to roll the material to be rolled to the desired specifications.
本発明の目的は、あらかじめ油のかかった状態とかかつ
ていない状態の各々についてセットアツプ値を計算して
おき、圧延中の油のオン・オフに応じてこのセットアツ
プ値を切換えることにより良好な板厚制御ヲ行ない得る
圧延機を提供するにある。The object of the present invention is to calculate a set-up value in advance for each of the oil-covered condition and the oil-free condition, and to change the set-up value depending on whether oil is on or off during rolling, thereby improving the rolling performance. The object of the present invention is to provide a rolling mill that can perform thickness control.
以下、本発明の詳細な説明する。圧延機のセットアツプ
装置は、イす、ドラフトスケジュールケ決定する。これ
は、被圧延材の圧延仕様、オンライン情報により、各ス
タンドの負荷が最も好ましい比になるように、パワーカ
ーブを使用して配分し、これにより各スタンド出側板厚
を決定する。The present invention will be explained in detail below. The rolling mill setup equipment determines the draft schedule. This uses a power curve to distribute the load on each stand so that it has the most preferable ratio based on the rolling specifications of the material to be rolled and online information, and thereby determines the plate thickness at the exit side of each stand.
次に、これら各スタンド出側板厚が実現されるように、
各スタンドのロール回転数および圧下位置全決定する。Next, in order to achieve the plate thickness on the exit side of each stand,
Determine the roll rotation speed and rolling position of each stand.
ロール回転数は、最終スタンド出側の仮温度が所定の範
囲に収まるように、まず、最終スタンドロール回転数全
決定し、次に、マスフロー一定の関係から各スタンド回
転数を決定する。Regarding the roll rotation speed, first, the final stand roll rotation speed is determined in total so that the temporary temperature on the exit side of the final stand is within a predetermined range, and then the rotation speed of each stand is determined based on the relationship that the mass flow is constant.
次に、各スタンド圧延荷重全算出する。Next, calculate the total rolling load for each stand.
pl = Kt bk石爾匹1言α1・QσI曲・曲(
1)ここに、Pl:第1スタンド圧延荷重
(以下、添字lは第1スタンド
r示す)
b :板幅
に1:変形抵抗
B、/ :偏平ロール半径
Hに入側板厚
hI:出側板厚
QμI:摩擦係数補正項
Qσロ張力補正項
R1:ロール半径
CH:ヒツチコックの定数
(1)式での変形抵抗Klは通常板の材質成分、温度、
圧下率、ひずみ速度により決まる。すなわち次式%式%
(3)
ここに、T1:板の温度
C:材質
Nl :ロール回転数
また、(1)式での摩擦係数補正項Q、p+ は公知
の1−j177の式より次式で表わされる。pl = Kt bk 1 word α1・QσI song・song (
1) Here, Pl: Rolling load on the first stand (hereinafter, the subscript l indicates the first stand r) b: 1 on the plate width: Deformation resistance B, /: Inlet plate thickness at the flat roll radius H I: Outlet plate thickness QμI: Friction coefficient correction term QσB Tension correction term R1: Roll radius CH: Hitchcock's constant Deformation resistance Kl in equation (1) is usually determined by the material composition of the plate, temperature,
Determined by rolling reduction rate and strain rate. That is, the following formula % formula % (3) Here, T1: Temperature of the plate C: Material Nl: Roll rotation speed Also, the friction coefficient correction term Q, p+ in formula (1) is as follows from the well-known formula 1-j177. It is expressed by the formula.
Qμl:T2(μ1.γl + hl + R1’ )
・・・・・・・・・・・・(4)ここに、μl
:摩擦係数
γ、:圧下率
上記(4)式で、摩擦係数μmは圧延油オン時およびオ
フ時で全く異なるものである。このため、摩擦係数補正
項Qμm は、圧延油オン・オフに応じて各々算出する
。このQltl が変化するため、(1)式により圧
延荷重PIは圧延油オンの場合と、オフの場合に異なっ
たものとなる。本発明では、圧延油のオン・オフに応じ
て各々圧延荷重P1゜およびP目を算出しておく。Qμl: T2 (μ1.γl + hl + R1')
・・・・・・・・・・・・(4) Here, μl
: Friction coefficient γ, : Reduction rate In the above equation (4), the friction coefficient μm is completely different when the rolling oil is on and when it is off. Therefore, the friction coefficient correction term Qμm is calculated depending on whether the rolling oil is on or off. Since this Qltl changes, according to equation (1), the rolling load PI will be different when the rolling oil is on and when it is off. In the present invention, the rolling load P1° and the Pth are calculated in advance depending on whether the rolling oil is on or off.
圧延荷重が決まれば、次式により圧下位置が算出される
。すなわち
ここに、Sl:圧下位置
MI=ミル弾性係数
8o1:ロールギャップ基準位置
ΔS、1:圧下位置修正係数
(5)式でも、圧延油オン時の圧延荷重P1゜および圧
延油オフ時の圧延荷重Pat各々に対し、圧延油オン時
の圧下位置SI0およびオフ時の圧下位置Slを各々a
出する。Once the rolling load is determined, the rolling position is calculated using the following formula. That is, here, Sl: Rolling position MI = Mill elastic modulus 8o1: Roll gap reference position ΔS, 1: Rolling position correction coefficient Also in formula (5), rolling load P1° when rolling oil is on and rolling load when rolling oil is off For each Pat, the rolling position SI0 when the rolling oil is on and the rolling position SL when the rolling oil is off are a
put out
以上のように、圧延油オンの状態での圧下位置および圧
延油オフの状態での圧下位置ラメらかじめ算出しておき
、圧延中のオン・オフに応じてこのセットアツプ値を切
換えて出力する。As described above, the rolling position when the rolling oil is on and the rolling position when the rolling oil is off are calculated in advance, and this set-up value is switched and output depending on whether it is on or off during rolling. do.
以下、本発明の一実施例を第1図により説明する。圧延
仕様記憶装置1に記憶された圧延材に関する情報および
オンライン情報により、ドラフトスケジュール決定装置
2で、パワーカーブヲ使用して各スタンド出側板厚を決
定する。次に、ロール回転数算出装#3では、ドラフト
スケジュール決定装置2で決定された各スタンド出側版
厚が実現されるように、マスフロー一定の条件よす各ス
タンドロール回転数を次式により算出する。An embodiment of the present invention will be described below with reference to FIG. Based on the information related to the rolled material stored in the rolling specification storage device 1 and online information, the draft schedule determining device 2 determines the sheet thickness at the exit side of each stand using a power curve. Next, roll rotation speed calculation device #3 calculates the rotation speed of each stand roll under the condition of constant mass flow using the following formula so that the plate thickness at the exit side of each stand determined by the draft schedule determination device 2 is achieved. do.
ここに、Nf:最終スタンドロール回転数几f :最終
スタンドロール半径
hf:最終スタンド出側板厚
fl:第1スタンド先進率
ff:最終スタンド先進率
圧延荷重算出装@4は、式(1)、 (2)、 (3)
、 (4)により圧延荷重Plを算出する。但し、この
とき、圧延油のかかつている場合の圧延荷重P五。およ
び圧延油のかかつていない場合の圧延荷重P目の各々を
計算しておく。Here, Nf: Final stand roll rotation speed f: Final stand roll radius hf: Final stand exit plate thickness fl: First stand advance rate ff: Final stand advance rate Rolling load calculation system @4 is expressed by formula (1). (2), (3)
, (4) calculates the rolling load Pl. However, at this time, the rolling load is P5 when rolling oil is applied. and the rolling load P when there is no rolling oil.
圧下位置算出装置5i−1,式(5)に圧延荷重算出装
置”4で倚られたl’+o + ht各々適川用、圧延
油オン時の圧下位置S l oおよび圧延油オフ時の圧
下位&S目を各々算出する。Rolling position calculating device 5i-1, formula (5), rolling force calculating device 4 calculates l' + o + ht, respectively, rolling position S lo when rolling oil is on and pressure when rolling oil is off. Calculate the lower & Sth rank respectively.
材料の圧延中に油供給装置6より圧延油がノズル7.8
より噴射される場合には圧延油オンの信号が、また、圧
延油をかけない場合には圧延油オフの信号が切換装置9
へ入力さrLるようになっている。During rolling of the material, rolling oil is supplied to the nozzle 7.8 from the oil supply device 6.
When the rolling oil is injected, the rolling oil ON signal is sent, and when the rolling oil is not injected, the rolling oil OFF signal is sent to the switching device 9.
It is designed to be input to rL.
通常の圧延で、まず油のかかっていない場合の圧下位置
8+tが通板時に適用されるように切換装置9がセット
され圧下駆動装置10.11によって圧下位置ヲセット
する。そして、圧延中に圧延油がかけらflたとき圧延
油オンの信号が切換装置9へ入力され、このとき、圧下
位置Sloが圧下駆動装置10.11に出力され圧下位
置を制御する。In normal rolling, first, the switching device 9 is set so that the rolling position 8+t when no oil is applied is applied during sheet passing, and the rolling position is set by the rolling drive device 10.11. Then, when the rolling oil is turned off during rolling, a rolling oil ON signal is input to the switching device 9, and at this time, the rolling position Slo is output to the rolling driving device 10.11 to control the rolling position.
本発明によノ′Lは、めらかじめ油のかかつている場合
と油のかかつていない場合のセットアツプ値を各々計算
しておき、圧延中の油のオン・オフに応じてセットアツ
プ値を切換えて適用できるので、圧延中の被圧延材の板
厚−張力の大幅変化を防ぐことができ、被圧延材を目的
の仕様に圧延することができる。According to the present invention, the set-up values are calculated separately for the case where smooth oil is applied and the case where no oil is applied, and the set-up value is calculated depending on whether the oil is on or off during rolling. Since the method can be switched and applied, it is possible to prevent a large change in the thickness-tension of the material to be rolled during rolling, and it is possible to roll the material to be rolled to the desired specifications.
第1図は本発明の一実施例のブロック図である。 FIG. 1 is a block diagram of one embodiment of the present invention.
Claims (1)
与えられた圧延仕様より、ドラフトスケジュールを決定
する装置、ロール回転数全算出する装置、圧延荷重の算
出装置、および圧下位置の算出装置を具備し、前記圧延
荷重の算出装置および前記圧下位置の算出装置は、圧延
油のががっている状態とかかつていない状態の圧延荷重
、圧下位lt’i各々計算しておき、圧延中の油のオン
、オフに応じて先に算出したセットアツプ値全切換えて
出力するように構成したことを特徴とする圧延機のセッ
トアツプ装置。1. A rolling mill consisting of multiple stands is equipped with a device for determining a draft schedule based on rolling specifications given in advance, a device for calculating the total number of roll rotations, a device for calculating rolling load, and a device for calculating the rolling position, and The rolling load calculating device and the rolling position calculating device calculate the rolling load and the rolling position when the rolling oil is full or not, and determine whether the oil is on or off during rolling. 1. A set-up device for a rolling mill, characterized in that it is configured to switch and output all set-up values calculated in advance according to the set-up values calculated in advance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58048875A JPS59174206A (en) | 1983-03-25 | 1983-03-25 | Set-up device of rolling mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58048875A JPS59174206A (en) | 1983-03-25 | 1983-03-25 | Set-up device of rolling mill |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59174206A true JPS59174206A (en) | 1984-10-02 |
Family
ID=12815455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58048875A Pending JPS59174206A (en) | 1983-03-25 | 1983-03-25 | Set-up device of rolling mill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59174206A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011079038A (en) * | 2009-10-09 | 2011-04-21 | Sumitomo Metal Ind Ltd | Method for controlling operation of tandem rolling machine and method for manufacturing hot-rolled steel sheet using the same |
CN103240279A (en) * | 2012-02-08 | 2013-08-14 | 株式会社日立制作所 | Control apparatus of hot continuous rolling mill and control method of hot continuous rolling mill |
-
1983
- 1983-03-25 JP JP58048875A patent/JPS59174206A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011079038A (en) * | 2009-10-09 | 2011-04-21 | Sumitomo Metal Ind Ltd | Method for controlling operation of tandem rolling machine and method for manufacturing hot-rolled steel sheet using the same |
CN103240279A (en) * | 2012-02-08 | 2013-08-14 | 株式会社日立制作所 | Control apparatus of hot continuous rolling mill and control method of hot continuous rolling mill |
JP2013158822A (en) * | 2012-02-08 | 2013-08-19 | Hitachi Ltd | Device and method for controlling hot tandem rolling mill |
CN103240279B (en) * | 2012-02-08 | 2015-10-28 | 株式会社日立制作所 | The control device of continuous hot-rolling mill and the control method of continuous hot-rolling mill |
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