JPH0596314A - Flange cooling control method for rolled steel - Google Patents

Flange cooling control method for rolled steel

Info

Publication number
JPH0596314A
JPH0596314A JP3255548A JP25554891A JPH0596314A JP H0596314 A JPH0596314 A JP H0596314A JP 3255548 A JP3255548 A JP 3255548A JP 25554891 A JP25554891 A JP 25554891A JP H0596314 A JPH0596314 A JP H0596314A
Authority
JP
Japan
Prior art keywords
flange
cooling
amount
cooling liquid
rolled
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.)
Withdrawn
Application number
JP3255548A
Other languages
Japanese (ja)
Inventor
Hiroyuki Matoba
弘行 的場
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3255548A priority Critical patent/JPH0596314A/en
Publication of JPH0596314A publication Critical patent/JPH0596314A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To cool shape steel uniformly in the transfer direction by calculate the target value of an amount of cooling liquid, controlling the amount of cooling liquid to be sprayed to a flange and feedback controlling the target value according to the measured value of an amount of sprayed cooled liquid to cool the flange. CONSTITUTION:Before begining to cool a rolled shape steel, a web temperature Tw and a flange temperature Tf are measured, a necessary amount of cooling water per unit length of material to be cooled is calculated according to the flange width size B of the material to be cooled, further, the amount Q of cooling water is required, first, by multiplying a transfer speed V of the material to be cooled. Then, when the transfer speed of the rolled shape steel is changed, an amount Q of cooling water depending on an elapsed time(t) from a time beginning to change the direction is required to decide an opening of a flow regulating valve. When the flow rate of the cooling liquid is regulated by the opening of the flow regulating valve, the flow control is conducted to add a deviation of an opening indicated value as a disturbance factor of the feedback control series and a feedback control to the opening target value is conducted.

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、圧延形鋼のフランジ冷
却制御方法に関し、さらに詳しくは、圧延を終了して高
温状態にある圧延形鋼のフランジに冷却液を吹き付けて
該フランジの冷却を行う際の、圧延形鋼のフランジ冷却
制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange cooling control method for rolled steel, and more particularly to cooling the flange by rolling a cooling liquid onto the flange of rolled steel in a high temperature state after rolling. The present invention relates to a flange cooling control method for rolled shape steel when performing.

【0002】[0002]

【従来の技術】圧延を終了して高温状態にある圧延形鋼
は、その後の工程での処理を円滑に行って生産性を向上
させるために、フランジに冷却液を吹き付けられて強制
的に冷却される。このような冷却を行う際に用いられる
従来の圧延形鋼のフランジ冷却装置としては、例えば特
開昭62−248507号公報により提案されているH形鋼のフ
ランジ冷却装置がある。
2. Description of the Related Art Rolled shaped steel, which has been rolled and is in a high temperature state, is forcibly cooled by spraying a cooling liquid on the flange in order to smoothly perform the subsequent processes and improve productivity. To be done. As a conventional flange cooling device for rolled steel used for such cooling, there is, for example, an H-shaped flange cooling device proposed by Japanese Patent Laid-Open No. 62-248507.

【0003】このフランジ冷却装置は、形鋼圧延機の前
面または後面に設けられて使用され、図3に示すよう
に、冷却液吹き付けノズル4とフランジ2との間に鉛直
方向に移動自在なマスキングプレート5を設け、このマ
スキングプレート5の鉛直方向における位置をフランジ
2の幅寸法情報、およびフランジ2の幅方向温度分布情
報の少なくとも一方に基づき制御装置7の指令に基づき
パワーシリンダ6により変位させることにより、前記マ
スキングプレート5によって吹き付けられた冷却液3が
フランジ2の上端部を超えてウェブ1の上面に飛散する
ことを防止する。したがって、このフランジ冷却装置に
よれば、フランジ2の幅寸法が異なる各種H形鋼8に対
して、冷却不要部分であるウェブ1を冷却することなく
フランジ2のみを冷却することができ、不均一な冷却に
起因するH形鋼8の形状および材質の低下を防止するこ
とができるとされている。
This flange cooling device is used by being installed on the front surface or the rear surface of a shaped steel rolling machine, and as shown in FIG. The plate 5 is provided, and the vertical position of the masking plate 5 is displaced by the power cylinder 6 based on a command from the control device 7 based on at least one of the width dimension information of the flange 2 and the temperature distribution information in the width direction of the flange 2. This prevents the cooling liquid 3 sprayed by the masking plate 5 from scattering over the upper surface of the flange 2 over the upper end portion of the flange 2. Therefore, according to this flange cooling device, it is possible to cool only the flange 2 with respect to various H-shaped steels 8 having different width dimensions of the flange 2 without cooling the web 1 which is a cooling unnecessary portion, and thus uneven. It is said that it is possible to prevent the deterioration of the shape and material of the H-section steel 8 due to the effective cooling.

【0004】本発明者の知見によれば、このフランジ冷
却装置には、フランジ幅方向に冷却液の流量分布が一様
とならないこと、およびこの流量分布を制御できないこ
と等の問題はあるものの、確かに従来よりもウェブおよ
びフランジ間の温度差を極力僅少に保持することがで
き、H形鋼の形状の悪化を防止できる。
According to the knowledge of the present inventor, although this flange cooling device has problems that the flow rate distribution of the cooling liquid is not uniform in the width direction of the flange and that this flow rate distribution cannot be controlled, Certainly, the temperature difference between the web and the flange can be kept as small as possible, and the deterioration of the shape of the H-section steel can be prevented.

【0005】[0005]

【発明が解決しようとする課題】しかし、このフランジ
冷却装置は、被冷却材である圧延H形鋼の冷却に際し
て、圧延H形鋼の移送速度および移送方向の温度分布を
全く考慮せずに冷却を行っている。したがって、H形鋼
の長手方向の形状および材質を一定にできないという問
題点を有する。
However, this flange cooling device cools the rolled H-section steel, which is the material to be cooled, without taking into consideration the transfer speed of the rolled H-section steel and the temperature distribution in the transfer direction. It is carried out. Therefore, there is a problem that the shape and material of the H-section steel in the longitudinal direction cannot be made constant.

【0006】つまり、このフランジ冷却装置を用いてフ
ランジを冷却する場合、被冷却材であるH形鋼は圧延速
度で移送されるために移送速度を冷却期間中を通じて一
定とすることはできず、また移送速度を移送方向の温度
分布を考慮した速度に調整することもできない。したが
って、このフランジ冷却装置によれば、圧延H形鋼を移
送方向に均一に冷却して均一な温度分布とすることが不
可能であり、成品である圧延H形鋼の形状および材質を
移送方向、すなわち長手方向について、一定にすること
はできなかったのである。
That is, when the flange is cooled by using this flange cooling device, the H-section steel as the material to be cooled is transferred at the rolling speed, and therefore the transfer speed cannot be kept constant throughout the cooling period. Further, the transfer speed cannot be adjusted to a speed that takes into consideration the temperature distribution in the transfer direction. Therefore, according to this flange cooling device, it is impossible to uniformly cool the rolled H-section steel in the transport direction to obtain a uniform temperature distribution, and the shape and material of the rolled H-section steel, which is a product, can be changed in the transport direction. That is, it was not possible to make it constant in the longitudinal direction.

【0007】しかし、近年に至り、建築分野その他の分
野で多用されるH形鋼の寸法精度および材質に対する要
求は極めて厳しくなっており、特に長手方向に関するH
形鋼各部の寸法精度および材質を向上させることは極め
て重要・かつ緊急度が高い問題である。ここに、本発明
の目的は、前記課題を解決することにあり、具体的に
は、被冷却材である圧延形鋼を移送方向に均一に冷却し
て移送方向の温度分布を均一化するように冷却できる圧
延形鋼のフランジ冷却制御方法を提供することにある。
However, in recent years, the requirements for the dimensional accuracy and material of H-section steels, which are frequently used in the construction field and other fields, have become extremely strict, and particularly in the longitudinal direction.
Improving the dimensional accuracy and materials of each section of shaped steel is a very important and urgent issue. Here, an object of the present invention is to solve the above problems, and specifically, to uniformly cool the rolled steel as a material to be cooled in the transfer direction to make the temperature distribution in the transfer direction uniform. (EN) Provided is a flange cooling control method for rolled steel which can be cooled to a high temperature.

【0008】[0008]

【課題を解決するための手段】本発明者は、上記課題を
解決するため種々検討を重ねた結果、本発明を完成し
た。ここに、本発明の要旨とするところは、フランジお
よびウェブを有する圧延形鋼の移送速度、加減速開始後
時間および冷却開始前のフランジおよびウェブ温度から
冷却液量の目標値を算出し、該目標値に基づいて前記フ
ランジに吹き付ける冷却液量を制御することを特徴とす
る圧延形鋼のフランジ冷却制御方法である。
The present inventor has completed the present invention as a result of various studies in order to solve the above problems. Here, the gist of the present invention is to calculate the target value of the cooling liquid amount from the transfer speed of the rolled steel having the flange and the web, the time after the start of acceleration / deceleration and the flange and the web temperature before the start of cooling, and A flange cooling control method for a rolled shape steel, characterized in that the amount of cooling liquid sprayed onto the flange is controlled based on a target value.

【0009】具体的には、圧延を終えたフランジおよび
ウェブを有する圧延形鋼のフランジ冷却制御方法であっ
て、(i)前記形鋼の移送速度、加減速開始後時間およ
び冷却開始前のフランジおよびウェブ温度を測定する工
程と、(ii) 測定した前記移送速度および冷却開始前の
フランジおよびウェブ温度から冷却液量を算出する工程
と、(iii) 測定した前記加減速開始後時間から加減速開
始後時間に依存する冷却液量を算出する工程と、(iv)
前記(ii)および(iii) により求めた各冷却液量の和から
仮空の全必要冷却液量を算出する工程と、(V) 前記(i
v)により求めた仮空の全必要冷却液量から前記フランジ
に吹き付ける冷却液量を制御する工程とを有することを
特徴とする圧延形鋼のフランジ冷却制御方法である。
Specifically, there is provided a flange cooling control method for a rolled shaped steel having a rolled flange and a web, comprising: (i) a transfer speed of the shaped steel, a time after the start of acceleration / deceleration and a flange before the start of cooling. And a step of measuring the web temperature, (ii) a step of calculating a cooling liquid amount from the measured transfer speed and the flange and web temperatures before the start of cooling, and (iii) acceleration and deceleration from the measured time after the start of acceleration / deceleration. A step of calculating the amount of cooling liquid that depends on the time after the start, (iv)
Calculating a total required cooling liquid amount in the temporary space from the sum of the respective cooling liquid amounts obtained in (ii) and (iii), and (V) above (i)
and a step of controlling the amount of cooling liquid to be sprayed onto the flange from the total required amount of cooling liquid in the temporary space obtained in v).

【0010】さらに、上記の本発明にかかる圧延形鋼の
フランジ冷却制御方法において、必要と算出された冷却
液量の変化分をフィードバック制御系の外乱因子として
足し込む流量調整を実施することによって、流量制御の
応答性向上を図ることができ、被冷却材の移送速度およ
び/または移送方向温度分布が急変する場合にも移送方
向に均一に冷却して移送方向の温度分布を均一化するこ
とができる。
Further, in the above-described flange cooling control method for rolled steel according to the present invention, the flow rate is adjusted by adding the necessary and calculated change in the coolant amount as a disturbance factor of the feedback control system. The responsiveness of the flow rate control can be improved, and even if the transfer speed and / or the temperature distribution in the transfer direction of the material to be cooled suddenly change, the material can be uniformly cooled in the transfer direction to make the temperature distribution in the transfer direction uniform. it can.

【0011】本発明において、「圧延形鋼」とは、圧延
により製造されるH形鋼、溝形鋼さらには山形鋼等のよ
うなフランジおよびウェブを有する圧延形鋼を包含す
る。冷却液の種類も特に限定する必要はなく、一般的に
は水を例示することができる。
In the present invention, the term "rolled section steel" includes rolled section steel having flanges and webs such as H-section steel, channel section steel and angle section steel produced by rolling. The type of the cooling liquid does not need to be particularly limited, and water can be generally exemplified.

【0012】[0012]

【作用】以下、本発明を、その制御系を模式的に示す図
1を参照しながら詳細に説明する。本発明では、フラン
ジおよびウェブを有する圧延形鋼の移送速度V、加減速
開始後時間tおよび冷却開始前のフランジ温度Tfおよび
ウェブ温度Twを測定し、これらの測定値から冷却液量の
仮空の目標値Qsを算出し、該目標値Qsに基づいて冷却液
吹き付けノズルから吹き付けられる冷却液の流量調整弁
の開度sを決定し、前記フランジに吹き付ける冷却液量
を制御する。
The present invention will be described in detail below with reference to FIG. 1, which schematically shows the control system thereof. In the present invention, the transfer speed V of the rolled steel having the flange and the web, the time t after the start of acceleration / deceleration, the flange temperature Tf and the web temperature Tw before the start of cooling are measured, and from these measured values, the vacant volume of the cooling liquid is measured. The target value Qs is calculated, the opening s of the flow rate adjusting valve of the cooling liquid sprayed from the cooling liquid spraying nozzle is determined based on the target value Qs, and the amount of the cooling liquid sprayed on the flange is controlled.

【0013】圧延形鋼の移送速度Vは、適宜手段により
測定すればよく、特定の手段には限定されない。また、
冷却開始前のフランジ温度Tfおよびウェブ温度Twも適宜
手段により測定すればよく、特定の手段には限定されな
い。ただし、圧延形鋼に非接触で測定を行うことができ
るものが耐久性および測定精度の観点からは望ましい。
The transfer speed V of the rolled steel may be measured by an appropriate means and is not limited to a specific means. Also,
The flange temperature Tf and the web temperature Tw before the start of cooling may be measured by appropriate means, and are not limited to specific means. However, it is desirable from the viewpoint of durability and measurement accuracy that the measurement can be performed without contact with the rolled steel.

【0014】加減速開始後時間tも適宜手段により測定
すればよく、特定の測定手段には限定されない。ここ
で、加減速開始後時間tとは圧延形鋼の移送速度の変更
があった場合の変更開始時刻からの経過時間であり、速
度が再度一定となった時点以降速度が一定である間はt
=0とする。
The time t after the start of acceleration / deceleration may be measured by an appropriate means, and is not limited to a specific measuring means. Here, the time t after the start of acceleration / deceleration is the elapsed time from the change start time when the transfer speed of the rolled shaped steel is changed, and while the speed is constant after the time when the speed becomes constant again, t
= 0.

【0015】上記の本発明により、冷却液量の仮空の目
標値Qsを算出する方法を例示する。まず、圧延形鋼の冷
却開始前のウェブ温度Tfおよびフランジ温度Twの実測
値、および圧延形鋼の寸法情報(フランジ幅寸法)Bに
併せて、圧延形鋼の単位長さ当りの必要冷却液量qを算
出する。すなわち、 q=K× (Tf−Tw) ×B ・・・・・・・ ただし、K:任意に設定可能な定数 により必要冷却液量qを算出し、さらに圧延形鋼の移送
速度Vを乗じることによて、冷却水量Q1を算出する。す
なわち、 Q1=V×q ・・・・・・・ 次に、加減速開始後時間tに依存する冷却液量、つまり
圧延形鋼の移送速度Vが加減速状態にある時の計算必要
流量Q1に対し、バルブ開閉の時間遅れを補正するための
流量である冷却液量Q2を求め、この冷却液量Q2を冷却液
量Q1に加え、必要冷却液量の総和である冷却液量の仮空
の目標値Qsを求める。すなわち、 Qs=Q1+Q2 ・・・・・・・ である。なお、図1に示す例では、圧延形鋼の移送速度
は5段階に調整可能であるが、その間での加減速率は全
て一定となっているので、aの値は場合分けの必要がな
く適正な一定値を設定することによって、被冷却材の移
送方向に均一な冷却を実施することができる。
A method for calculating the temporary target value Qs of the cooling liquid amount according to the present invention will be exemplified. First, together with the measured values of the web temperature Tf and the flange temperature Tw before the cooling of the rolled shape steel and the dimension information (flange width dimension) B of the rolled shape steel, the necessary cooling liquid per unit length of the rolled shape steel Calculate the quantity q. That is, q = K × (Tf−Tw) × B ..... However, K: The required cooling liquid amount q is calculated by a constant that can be set arbitrarily, and is further multiplied by the transfer speed V of the rolled shape steel. Therefore, the cooling water amount Q 1 is calculated. That is, Q 1 = V × q ..... Next, the amount of cooling liquid that depends on the time t after the start of acceleration / deceleration, that is, the flow rate required for calculation when the transfer speed V of the rolled shape steel is in the acceleration / deceleration state. to Q 1, determine the amount of coolant Q 2 is the flow rate for correcting the time lag of the valve opening and closing, adding the amount of coolant Q 2 in the cooling liquid quantity Q 1, is the sum of the required amount of coolant cooling The target value Qs of the temporary liquid volume is calculated. That is, Qs = a Q 1 + Q 2 ·······. In the example shown in FIG. 1, the transfer speed of the rolled steel can be adjusted in 5 steps, but since the acceleration / deceleration rates are all constant during that time, the value of a does not need to be divided into cases and is appropriate. By setting such a constant value, uniform cooling can be performed in the transport direction of the material to be cooled.

【0016】このようにして求めた冷却液量の仮空の目
標値Qsに応じて、冷却液吹き付けノズルに送る冷却液量
を調整する流量調整弁の開度sを決定・変更するのであ
る。
The opening s of the flow rate adjusting valve for adjusting the amount of cooling liquid to be sent to the cooling liquid spray nozzle is determined and changed according to the provisional target value Qs of the amount of cooling liquid thus obtained.

【0017】本発明によれば、圧延形鋼の移送速度、加
減速開始後時間、冷却開始前のウェブおよびフランジ温
度の各種条件の基で、適正な冷却水量を常に噴射するこ
とができる。したがって、本発明にかかる圧延形鋼のフ
ランジ冷却制御方法によりフランジを冷却すれば、圧延
形鋼を移送方向に均一に冷却して均一な温度分布とする
ことが可能であり、成品である圧延H形鋼の形状および
材質を長手方向について一定にすることができるため、
不均一な冷却によって生じる圧延形鋼の形状および材質
低下を防止することができる。
According to the present invention, an appropriate amount of cooling water can be constantly jetted based on various conditions such as the transfer speed of rolled steel, the time after the start of acceleration / deceleration, and the temperature of the web and the flange before the start of cooling. Therefore, if the flange is cooled by the flange shape cooling control method for rolled shape steel according to the present invention, it is possible to uniformly cool the rolled shape steel in the transfer direction to obtain a uniform temperature distribution. Since the shape and material of shaped steel can be made constant in the longitudinal direction,
It is possible to prevent the deterioration of the shape and material of the rolled shape steel caused by the uneven cooling.

【0018】さらに、上記の本発明にかかる圧延形鋼の
フランジ制御方法において、必要な冷却液量の変化分を
フィードバック制御系の外乱因子として足し込む流量調
整を実施することによって、流量制御の応答性向上を図
ることができ、被冷却材の移送速度および/または移送
方向温度分布が急変する場合にも移送方向に均一に冷却
して移送方向の温度分布を均一化することができる。
Further, in the above-described flange control method for rolled shape steel according to the present invention, the flow rate control response is achieved by performing flow rate adjustment by adding a necessary change amount of the coolant as a disturbance factor of the feedback control system. Even when the transfer speed and / or the temperature distribution in the transfer direction of the material to be cooled changes abruptly, the material to be cooled can be uniformly cooled in the transfer direction to make the temperature distribution in the transfer direction uniform.

【0019】すなわち、図1において流量実測値と仮空
の目標値Qsとを比較して行うフィードバック PID制御系
の外乱因子として、該目標値Qsに対応するバルブ開度S
の変化量(Sn −Sn-1)を加算することによって、流量制
御精度および応答性を向上させることができる。さら
に、本発明を実施例を参照しながら詳述するが、これは
あくまでも本発明の例示であって、これにより本発明が
限定されるものではない。
That is, as shown in FIG. 1, the valve opening S corresponding to the target value Qs is used as the disturbance factor of the feedback PID control system that is performed by comparing the measured flow rate value with the target value Qs of the temporary space.
The flow rate control accuracy and responsiveness can be improved by adding the change amount (S n −S n−1 ) of Further, the present invention will be described in detail with reference to examples, but this is merely an example of the present invention, and the present invention is not limited thereby.

【0020】[0020]

【実施例】図1に示す制御内容を有する圧延形鋼のフラ
ンジ冷却制御装置を形鋼の圧延装置の出側に設置し、H
形鋼のフランジの冷却を行った。本実施例では、図1に
示されるように、圧延形鋼の冷却開始前ウェブ温度Tw
およびフランジ温度Tf を実測し、被冷却材のフランジ
幅寸法Bに合わせて被冷却材単位長さ当りの必要冷却水
量qを算出し、さらに被冷却材の移送速度Vを剰じるこ
とによって、まず冷却水量Q1を求めた。
EXAMPLE A flange cooling control device for rolled shaped steel having the control contents shown in FIG. 1 is installed on the outlet side of the rolled device for shaped steel, and H
The flange of the section steel was cooled. In the present embodiment, as shown in FIG. 1, the pre-cooling web temperature T w of the rolled shaped steel is set.
By measuring the flange temperature T f and the flange width dimension B of the material to be cooled, the required cooling water amount q per unit length of the material to be cooled is calculated, and the transfer speed V of the material to be cooled is added. First, the cooling water amount Q 1 was obtained.

【0021】次に、圧延形鋼の移送速度の変更があった
場合に変更開始時刻からの経過時間tに依存する冷却水
量Q2を加え、仮空の全必要冷却水量 QS を求め流量調整
弁の開度sを決定した (本発明例1) 。さらに、上記の
手順により定めた開度sにより冷却液の流量調整を行っ
ているときに、フィードバック制御系の外乱因子とし
て、流量調整弁開度指示値の偏差分を足し込む流量調整
を実施して、開度目標値のフィードバック制御を行っ
た。(本発明例2)。
Next, when there is a change in the transfer speed of the rolled shaped steel, the cooling water amount Q 2 which depends on the elapsed time t from the start time of the change is added to obtain the total required cooling water amount Q S in the temporary space, and the flow rate adjustment The valve opening s was determined (Example 1 of the present invention). Further, when the flow rate of the cooling liquid is adjusted by the opening degree s determined by the above procedure, the flow rate adjustment is performed by adding the deviation of the flow rate adjustment valve opening instruction value as a disturbance factor of the feedback control system. Then, feedback control of the target opening value was performed. (Invention example 2).

【0022】なお、本実施例で用いた必要冷却水量算出
式は、前述のように、次のとおりであった。 q (m3/min)=K× (Tf −Tw ) ×B・・・・・・・ Q1 (m3/Hr ) ×q ・・・・・・・ Q2 (m3/Hr ) =at ・・・・・・・ QS (m3/Hr )=Q1 +Q2 ・・・・・・・ ただし、K=2.4 (m3/m2℃)、B=0.2(m)、a=330(m3
/Hr/s )であった。本実施例による冷却水流量制御結果
を比較例とともに図2に示す。比較例は、形鋼の長手方
向に関しては温度制御を何ら行っていない従来の制御方
法を用いた。
The required cooling water amount calculation formula used in this embodiment was as follows, as described above. q (m 3 / min) = K × (T f −T w ) × B ・ ・ ・ ・ Q 1 (m 3 / Hr) × q ・ ・ ・ ・ ・ ・ ・ ・ Q 2 (m 3 / Hr ) = at ······· Q S (m 3 / Hr) = Q 1 + Q 2 ······· However, K = 2.4 (m 3 / m 2 ℃), B = 0.2 (m) , A = 330 (m 3
/ Hr / s). The cooling water flow rate control result according to the present embodiment is shown in FIG. 2 together with the comparative example. In the comparative example, a conventional control method in which no temperature control was performed in the longitudinal direction of the shaped steel was used.

【0023】結果を図2にまとめて示す。図2におい
て、本発明例では、仮空の目標流量Qsを導入したことに
よって実流量 QR と必要冷却水量 Q1 との比を 0.8〜1.
2 とすることができた。特に、本発明例2ではフィード
バック制御系の外乱因子として該目標値 Qs の変化量を
加算することによって実流量 QR と必要冷却水量Q1
の比を0.95〜1.05とすることができた。一方、長手方向
に温度制御を行なわない比較例においては、目標流量Qs
および実流量 QR は一定であるため、実流量 QR と必要
流量Q1 との比は全く制御されていない。
The results are summarized in FIG. 0.8 2, in the present invention example, the ratio of the actual flow rate Q R and the required quantity of cooling water Q 1 by the introduction of the provisional empty target flow rate Qs.
Could be 2. In particular, the ratio of the actual flow rate Q R and the required quantity of cooling water Q 1 by adding the change amount of the target value Qs as a disturbance factor of the present invention Example 2, the feedback control system could be 0.95 to 1.05. On the other hand, in the comparative example in which temperature control is not performed in the longitudinal direction, the target flow rate Qs
And for the actual flow rate Q R is constant, the ratio of the actual flow rate Q R and the required flow rate Q 1 is not controlled at all.

【0024】従来の方法では、H形鋼の長手方向につい
て充分な流量制御を行うことができなかったが、本発明
によれば極めて高精度にH形鋼の長手方向の温度分布を
均一化することができた。
In the conventional method, it was not possible to sufficiently control the flow rate in the longitudinal direction of the H-section steel, but according to the present invention, the temperature distribution in the longitudinal direction of the H-section steel is made uniform with extremely high accuracy. I was able to do it.

【0025】[0025]

【発明の効果】以上詳述したように、本発明により、被
冷却材の移送速度、加減速開始後時間、冷却前ウェブ・
フランジ温度に最適な冷却液量を常に噴出することがで
き、被冷却材であるフランジおよびウェブを有する形鋼
を移送方向に均一に冷却すること、あるいは移送方向温
度分布を均一化するように冷却することができた。かか
る効果を有する本発明の意義は極めて著しい。
As described in detail above, according to the present invention, the transfer speed of the material to be cooled, the time after the start of acceleration / deceleration, the web before cooling,
The optimum amount of cooling liquid for the flange temperature can always be jetted, and the shaped steel having the flange and the web that is the material to be cooled can be cooled uniformly in the transfer direction, or can be cooled so as to make the temperature distribution in the transfer direction uniform. We were able to. The significance of the present invention having such effects is extremely remarkable.

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

【図1】本発明にかかる圧延形鋼のフランジ冷却制御方
法の制御内容を模式的に示す略式説明図である。
FIG. 1 is a schematic explanatory diagram schematically showing the control content of a flange cooling control method for rolled steel according to the present invention.

【図2】本発明の実施例の結果を示すグラフである。FIG. 2 is a graph showing the results of the examples of the present invention.

【図3】従来のH形鋼のフランジ冷却装置の構成を示す
略式説明図である。
FIG. 3 is a schematic explanatory view showing the structure of a conventional H-section steel flange cooling device.

【符号の説明】[Explanation of symbols]

1:ウェブ 2:フランジ 3:冷却液 4:冷却液吹き付けノズル 5:マスキングプレート 6:パワーシリンダ 7:制御装置 8:H形鋼 1: Web 2: Flange 3: Cooling liquid 4: Cooling liquid spraying nozzle 5: Masking plate 6: Power cylinder 7: Control device 8: H-shaped steel

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 フランジおよびウェブを有する圧延形鋼
の移送速度、加減速開始後時間および冷却開始前のフラ
ンジおよびウェブ温度から冷却液量の目標値を算出し、
該目標値に基づいて前記フランジに吹き付ける冷却液量
を制御することを特徴とする圧延形鋼のフランジ冷却制
御方法。
1. A target value of a cooling liquid amount is calculated from a transfer speed of a rolled steel having a flange and a web, a time after the start of acceleration / deceleration and a temperature of the flange and the web before the start of cooling,
A flange cooling control method for rolled steel, comprising controlling the amount of cooling liquid sprayed onto the flange based on the target value.
【請求項2】 圧延を終えたフランジおよびウェブを有
する圧延形鋼のフランジ冷却制御方法であって、 (i)前記形鋼の移送速度、加減速開始後時間および冷
却開始前のフランジおよびウェブ温度を測定する工程
と、 (ii) 測定した前記移送速度および冷却開始前のフラン
ジおよびウェブ温度から冷却液量を算出する工程と、 (iii) 測定した前記加減速開始後時間から加減速開始後
時間に依存する冷却液量を算出する工程と、 (iv) 前記(ii)および(iii) により求めた各冷却液量の
和から仮空の全必要冷却液量を算出する工程と、 (V) 前記(iv)により求めた仮空の全必要冷却液量から
前記フランジに吹き付ける冷却液量を制御する工程とを
有することを特徴とする圧延形鋼のフランジ冷却制御方
法。
2. A flange cooling control method for rolled shaped steel having a rolled flange and a web, comprising: (i) transfer speed of the shaped steel, time after start of acceleration / deceleration, and flange and web temperature before start of cooling. And (ii) a step of calculating a cooling liquid amount from the measured transfer speed and the flange and web temperatures before the start of cooling, and (iii) the measured time after the start of acceleration / deceleration after the start of acceleration / deceleration A step of calculating the amount of cooling liquid depending on (iv) a step of calculating the total required amount of cooling liquid in the temporary empty space from the sum of the amounts of cooling liquid obtained in (ii) and (iii) above, (V) And (4) controlling the amount of cooling liquid sprayed onto the flange from the total required amount of cooling liquid in the temporary space obtained in (iv).
【請求項3】 さらに、吹き付けた前記冷却液量の実測
値により前記目標値をフィードバック制御することを特
徴とする請求項1または請求項2記載の圧延形鋼のフラ
ンジ冷却制御方法。
3. The flange cooling control method for a rolled shape steel according to claim 1, further comprising feedback controlling the target value based on an actually measured value of the sprayed cooling liquid amount.
【請求項4】 請求項3記載の圧延形鋼のフランジ冷却
制御方法において、必要と算出された冷却液量の変化分
をフィードバック制御系の外乱因子として足し込む流量
調整を実施することを特徴とする圧延形鋼のフランジ冷
却制御方法。
4. The flange cooling control method for a rolled shape steel according to claim 3, wherein a flow rate adjustment is performed by adding a necessary and calculated change in the coolant amount as a disturbance factor of the feedback control system. Method for controlling flange cooling of rolled steel.
JP3255548A 1991-10-02 1991-10-02 Flange cooling control method for rolled steel Withdrawn JPH0596314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3255548A JPH0596314A (en) 1991-10-02 1991-10-02 Flange cooling control method for rolled steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3255548A JPH0596314A (en) 1991-10-02 1991-10-02 Flange cooling control method for rolled steel

Publications (1)

Publication Number Publication Date
JPH0596314A true JPH0596314A (en) 1993-04-20

Family

ID=17280256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3255548A Withdrawn JPH0596314A (en) 1991-10-02 1991-10-02 Flange cooling control method for rolled steel

Country Status (1)

Country Link
JP (1) JPH0596314A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100363122C (en) * 2005-05-20 2008-01-23 鞍钢股份有限公司 A method for controlling the flow rate of cooling liquid for cold-rolled strip steel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100363122C (en) * 2005-05-20 2008-01-23 鞍钢股份有限公司 A method for controlling the flow rate of cooling liquid for cold-rolled strip steel

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