JPH06134514A - Method and device for cooling hot rolled steel sheet - Google Patents

Method and device for cooling hot rolled steel sheet

Info

Publication number
JPH06134514A
JPH06134514A JP28863392A JP28863392A JPH06134514A JP H06134514 A JPH06134514 A JP H06134514A JP 28863392 A JP28863392 A JP 28863392A JP 28863392 A JP28863392 A JP 28863392A JP H06134514 A JPH06134514 A JP H06134514A
Authority
JP
Japan
Prior art keywords
steel sheet
cooling
tip
hot
steel plate
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
Application number
JP28863392A
Other languages
Japanese (ja)
Inventor
Naoki Nakada
直樹 中田
Tomotaka Marui
智敬 丸井
Kazuo Arai
和夫 新井
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 JP28863392A priority Critical patent/JPH06134514A/en
Publication of JPH06134514A publication Critical patent/JPH06134514A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase the cooling capacity for the back surface of a steel sheet by movably controlling a supporting device with which the tip of the hot rolled steel sheet which is entered into a cooling device is supported at a good timing. CONSTITUTION:The device for supporting the tip of the hot rolled steel sheet 1 is composed of plural supporting plates 4 which are arranged in the transporting direction of the steel sheet, two wires 5, rollers 6 having a guide groove and winches 7, 7'. Each supporting plate 4 is connected with the wire 5, made into a belt structure as a whole and can move in and out with a driving motor while being guided by the groove of the roller 6. The supporting device is driven and controlled at the timing when the tip of the steel sheet 1 is entered between table rollers 2, 2'. The tip of the steel sheet is surely passed on the pass line without hunging down downward with the supporting device between the rollers 2, 2'. On the other hand, the supporting plates 4 are advanced after changing the direction downward by the leading of the wires 5, retreated in a position where cooling water for the under surface is not shielded and stopped.

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、熱延鋼板の冷却方法及
び冷却装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cooling a hot rolled steel sheet.

【0002】[0002]

【従来の技術】近年の鋼板製造プロセスに関し、製品の
強度や加工性など品質の向上を目的とした材質制御の研
究が盛んになってきており、これまで数多くの鋼種につ
いて、目的とする材質を得るために必要な合金成分や熱
処理条件が明らかにされてきた。
2. Description of the Related Art In recent years, with regard to steel plate manufacturing processes, research on material control for the purpose of improving quality such as strength and workability of products has been actively conducted. The alloy components and heat treatment conditions necessary for obtaining the same have been clarified.

【0003】これらの鋼種には、熱間圧延後に大きな冷
却速度を必要とするものも多く、例えば高張力鋼では仕
上圧延直後に40℃/秒以上の冷却速度を得て初めて目的
とする強度が得られるような鋼種もある。したがって、
多鋼種にわたってそれぞれに必要な熱間圧延後の熱処理
条件を満足しながら生産を可能とするためには、熱延鋼
板冷却設備における鋼板の冷却能力をより大きくする方
が望ましい。
Many of these steel grades require a high cooling rate after hot rolling. For example, in the case of high-strength steel, the desired strength cannot be obtained until a cooling rate of 40 ° C./sec or more is obtained immediately after finish rolling. There are also steel types that can be obtained. Therefore,
In order to enable production while satisfying the heat treatment conditions after hot rolling for each of multiple steel types, it is desirable to increase the cooling capacity of the steel sheet in the hot-rolled steel sheet cooling equipment.

【0004】従来、鋼板の熱間圧延設備において仕上圧
延機よりも鋼板搬送方向下流に位置する冷却装置では、
冷却水の供給量を増やすことによって冷却能力の増大を
はかるのが一般的である。例えば、実開平1−114107号
公報記載の技術のように幅方向に冷却ノズルを配列した
ヘッダの配設方法を工夫することによって鋼板の広い面
積にわたって直接冷却水を供給し、鋼板に高い冷却速度
を与える技術が公知である。
Conventionally, in a hot-rolling equipment for steel plates, a cooling device located downstream of the finish rolling machine in the steel plate conveying direction,
Generally, the cooling capacity is increased by increasing the supply amount of cooling water. For example, cooling water is directly supplied over a wide area of a steel sheet by devising a method of disposing a header in which cooling nozzles are arranged in the width direction as in the technique described in Japanese Utility Model Laid-Open No. 1-114107, and a high cooling rate is applied to the steel sheet. Techniques for providing the are known.

【0005】これらの熱延鋼板冷却装置では、通板性を
そこなわないよう、いいかえれば鋼板が安定にしかも確
実に走行して巻取り機に到達するように配慮されてお
り、鋼板搬送テーブルロールの間隔は通常 300〜500mm
程度としている。各ロール間では例えば図5のような冷
却ヘッダ3’が設置されており、各ノズルから水を噴出
させることにより鋼板下面の冷却を行っている。また、
ヘッダを設置していないロール間では多くの場合、図6
のように鋼板先端がロール2、2’間に侵入するのを防
ぐため、図7に示すような侵入防止板9をロール間に設
置、固定している。
In these hot-rolled steel sheet cooling devices, it is considered that the steel sheet travels stably and surely so as to reach the winding machine so as not to impair the sheet passing property. Is usually 300 ~ 500mm
It is about degree. A cooling header 3'as shown in FIG. 5, for example, is installed between the rolls, and the bottom surface of the steel sheet is cooled by ejecting water from each nozzle. Also,
In most cases, the rolls without the header are shown in FIG.
In order to prevent the tip of the steel plate from entering between the rolls 2 and 2 ', an intrusion prevention plate 9 as shown in FIG. 7 is installed and fixed between the rolls.

【0006】[0006]

【発明が解決しようとする課題】搬送中の鋼板下面には
通常 300〜500mm の間隔ごとにテーブルロールが設置さ
れているため、ロール間のスペースが狭く、下面冷却ヘ
ッダは1本ないし2本程度しか設置できない。このた
め、冷却水を直接供給できる箇所は鋼板下面の一部に限
られていた。下面冷却ヘッダの設置スペースを広くとる
ためにロール間隔を長くすると、鋼板先端が図6のよう
にロール間に侵入しやすくなる。特に板厚が薄い場合は
鋼板先端が下方に垂れやすいので、半成コイルが発生す
る危険性が高くなる。したがってロール間隔を長くする
には問題があった。また、ヘッダにより多くのノズルを
配列させれば冷却水を直接供給できる箇所の面積は増大
するが、逆に各ノズルでの水量が減少するため冷却能力
を増強するには限界があった。
Since the table rolls are usually installed at intervals of 300 to 500 mm on the bottom surface of the steel sheet during conveyance, the space between the rolls is narrow, and one or two bottom surface cooling headers are provided. Can only be installed. For this reason, the place where the cooling water can be directly supplied was limited to a part of the lower surface of the steel plate. If the roll interval is lengthened in order to increase the installation space for the lower surface cooling header, the tip of the steel plate easily enters between the rolls as shown in FIG. In particular, when the plate thickness is thin, the tip of the steel plate easily hangs downward, so that the risk of generating a semi-finished coil increases. Therefore, there is a problem in increasing the roll interval. Further, if a larger number of nozzles are arranged in the header, the area where the cooling water can be directly supplied increases, but conversely, the amount of water in each nozzle decreases, so there is a limit to increasing the cooling capacity.

【0007】一方、実開平1−114107号公報記載の技術
などにより鋼板上面を冷却する場合は、冷却水の供給量
を増やすことである程度冷却能力を増強する効果があ
る。しかし、鋼板上面では冷却水が滞留する上、表面で
発生する蒸気膜が下面と比べて離脱しやすいから、もと
もと上面での冷却能力の方が下面よりもかなり高いのが
現状である。したがって、鋼板上面のみの冷却能力を増
強すると冷却途中で鋼板上下面の温度差が大きくなり、
これによって幅方向に反りを生じるなどの弊害が発生す
るという問題がある。
On the other hand, when the upper surface of the steel sheet is cooled by the technique described in Japanese Utility Model Laid-Open No. 1-114107, the cooling capacity is increased to some extent by increasing the supply amount of cooling water. However, since the cooling water stays on the upper surface of the steel plate and the vapor film generated on the surface is more likely to separate from the lower surface, the cooling capacity on the upper surface is considerably higher than that on the lower surface. Therefore, if the cooling capacity of only the upper surface of the steel sheet is increased, the temperature difference between the upper and lower surfaces of the steel sheet becomes large during cooling,
This causes a problem that a warp occurs in the width direction.

【0008】本発明は上述した従来技術の問題点を解消
するものであり、鋼板上面よりもむしろ下面について冷
却水の供給量を増やすことによって冷却能力を増強する
熱延鋼板の冷却方法および冷却装置を提供することを目
的とするものである。
The present invention solves the above-mentioned problems of the prior art, and a cooling method and a cooling device for a hot-rolled steel sheet which enhances the cooling capacity by increasing the amount of cooling water supplied to the lower surface rather than the upper surface of the steel sheet. It is intended to provide.

【0009】[0009]

【課題を解決するための手段】本発明は、熱間圧延機と
巻取り機間で熱延鋼板を冷却するに際して、鋼板搬送テ
ーブルロール間に鋼板支持装置を移動可能に設置し、該
鋼板先端通過時の鋼板支持を行い、該鋼板先端通過後に
該鋼板支持装置を退避させ、該鋼板下面へ該テーブルロ
ール間より冷却水を噴出することを特徴とする熱延鋼板
の冷却方法であり、また熱間圧延機と巻取り機間に設置
された熱延鋼板冷却装置において、鋼板搬送テーブルロ
ール間のパスラインに沿って鋼板支持装置を移動可能に
設置し、かつ該パスラインの上下に冷却水供給ヘッダを
配置したことを特徴とする熱延鋼板の冷却装置であり、
またこの装置に演算器と制御器を設けることにより、タ
イミングよく、確実に鋼板先端の支持ならびに冷却水供
給バルブの開閉を行わせることができる。
According to the present invention, when cooling a hot-rolled steel sheet between a hot rolling mill and a winding machine, a steel sheet supporting device is movably installed between steel sheet transport table rolls, and the steel sheet tip is provided. A method for cooling a hot-rolled steel sheet, characterized in that the steel sheet is supported during passage, the steel sheet supporting device is retracted after passing through the steel sheet tip, and cooling water is jetted from the space between the table rolls to the lower surface of the steel sheet. In a hot-rolled steel plate cooling device installed between a hot rolling mill and a winder, a steel plate supporting device is movably installed along a path line between steel plate transport table rolls, and cooling water is provided above and below the path line. A cooling device for a hot-rolled steel sheet, characterized in that a supply header is arranged,
Further, by providing a computing unit and a control unit in this device, it is possible to surely support the tip of the steel plate and open / close the cooling water supply valve in good timing.

【0010】[0010]

【作用】本発明では、熱延鋼板冷却装置内での搬送時に
おいて、テーブルロール間に鋼板支持装置を配設し、先
端通過時に鋼板の支持を行う。これによって、鋼板先端
がロール間に侵入することを防ぐとともに、ロール間隔
を従来よりも長くすることができる。
According to the present invention, a steel plate supporting device is provided between the table rolls during conveyance in the hot-rolled steel plate cooling device, and the steel plate is supported when the leading edge passes. As a result, the tip of the steel plate can be prevented from entering between the rolls, and the roll interval can be made longer than before.

【0011】一方、ロール間隔を従来よりも長くするこ
とで下面冷却ヘッダの設置スペースが広くなる。これに
よって鋼板の単位面積あたりに供給できる水量を従来よ
り増やすことができ、熱延鋼板の冷却設備における冷却
能力を増強することが可能となる。鋼板の支持は先端通
過時にのみ行えばよく、先端通過後にこの支持装置を移
動退避し、鋼板下面への冷却水の供給を開始することが
できる。
On the other hand, by making the roll interval longer than before, the installation space for the lower surface cooling header becomes wider. As a result, the amount of water that can be supplied per unit area of the steel sheet can be increased more than before, and the cooling capacity of the hot-rolled steel sheet in the cooling facility can be increased. The steel plate may be supported only when the tip passes, and after passing the tip, the supporting device can be moved and retracted to start supplying cooling water to the lower surface of the steel plate.

【0012】[0012]

【実施例】本発明の実施例を図面に基づいて説明する。
図1、2は本発明の一実施例である冷却装置を示す図で
あり、図3は鋼板支持装置の具体的構造を示すための斜
視図である。図1、2、3において、支持装置は鋼板搬
送方向に複数並んだ支持板4と2本のワイヤー5、案内
溝を有するロール6ならびにウインチ7、7’によって
構成されている。各支持板はワイヤーによって連結さ
れ、全体でベルト構造になっている。支持板は、駆動モ
ータで回転されるウインチロールでワイヤーの巻き付け
及び巻きほぐしを行うことによって、ロール6の溝で案
内されながら移動することが可能である。
Embodiments of the present invention will be described with reference to the drawings.
1 and 2 are views showing a cooling device which is an embodiment of the present invention, and FIG. 3 is a perspective view showing a concrete structure of a steel plate supporting device. 1, 2 and 3, the supporting device is composed of a plurality of supporting plates 4 arranged in the steel sheet conveying direction, two wires 5, a roll 6 having guide grooves, and winches 7 and 7 '. Each support plate is connected by a wire and has a belt structure as a whole. The support plate can be moved while being guided by the groove of the roll 6 by winding and unwinding the wire with a winch roll rotated by a drive motor.

【0013】図1において、待機状態にあった鋼板支持
装置は鋼板1の先端がテーブルロール2〜2’間に進入
するタイミングに合わせて鋼板搬送方向に移動を開始す
る。このタイミングは、演算器8において、鋼板搬送方
向上流に位置する図示しない先端検出装置から鋼板先端
の通過検出信号を受けた後、先端通過時刻を計算して駆
動モータの回転速度とともに決定され、その結果に基づ
き制御器9にてウインチロール7、7’の駆動状態をコ
ントロールしている。ロール2〜2’間の支持装置で支
持された鋼板先端は、下方に垂れることなくパスライン
上を確実に通過し、ロール2’に誘導される。一方、支
持板4はワイヤー5の誘導により下方に向きを変えて進
行し、下面冷却水を遮蔽しない位置に退避した後に停止
する。
In FIG. 1, the steel plate supporting device in the standby state starts moving in the steel plate conveying direction at the timing when the tip of the steel plate 1 enters between the table rolls 2 and 2 '. This timing is determined together with the rotation speed of the drive motor by calculating the tip passage time after receiving the passage detection signal of the tip of the steel sheet from the tip detection device (not shown) located upstream in the steel sheet conveying direction in the calculator 8. Based on the result, the controller 9 controls the drive states of the winch rolls 7 and 7 '. The front end of the steel plate supported by the supporting device between the rolls 2 and 2 ′ surely passes on the pass line without hanging downward and is guided to the roll 2 ′. On the other hand, the support plate 4 is turned downward by the guide of the wire 5 to proceed, and is stopped after retracting to a position where the lower surface cooling water is not shielded.

【0014】先端通過後、図2に示す状態になると同時
に制御器9の信号により上下ヘッダ3、3’の自動バル
ブ10を開放して注水を行い、鋼板の冷却を開始すること
ができる。さらに鋼板尾端通過後に制御器9にてウイン
チロール7、7’を逆転させることによってワイヤー5
を巻き戻し、次の先端通過のための待機状態に戻すこと
によって、本発明装置を繰り返し使用することができ
る。
After the tip has passed, at the same time as the state shown in FIG. 2, the automatic valve 10 of the upper and lower headers 3 and 3'is opened to inject water by a signal from the controller 9, and cooling of the steel sheet can be started. Furthermore, after passing the tail end of the steel plate, the winch rolls 7 and 7'are reversed by the controller 9 so that the wire 5
The apparatus of the present invention can be repeatedly used by rewinding the sheet and returning it to the standby state for the next tip passage.

【0015】図4はこの本発明の冷却方法のフローチャ
ート図である。本発明では、図5に示すような従来設備
に比べてロール間隔を長くすることで鋼板下面の単位面
積あたりに供給できる水量を増やすことができ、冷却設
備における冷却能力を増強することができた。これによ
って、従来の設備で不可能であった高張力鋼などの新鋼
種の製造が可能となった。また、冷却設備に設置するテ
ーブルロールの総数が少なくなったから、設備コストを
低くすることができた。
FIG. 4 is a flow chart of the cooling method of the present invention. In the present invention, the amount of water that can be supplied per unit area of the lower surface of the steel sheet can be increased by increasing the roll interval as compared with the conventional equipment as shown in FIG. 5, and the cooling capacity in the cooling equipment can be increased. . This has enabled the production of new steel grades such as high-strength steel, which was not possible with conventional equipment. Moreover, since the total number of table rolls installed in the cooling equipment is reduced, the equipment cost can be reduced.

【0016】なお、本実施例ではテーブルロール間での
鋼板先端の支持を支持板をベルト状に連結したものによ
って行っているが、本発明方法における先端支持方法は
これに限るものではなく、例えば移動式のロールないし
は高速ベルトコンベアなどによって支持を行ってもよ
い。さらに、支持装置が鋼板の幅方向に移動し、先端通
過時にのみライン内に挿入されるような装置としてもよ
い。
In this embodiment, the tip of the steel plate is supported between the table rolls by connecting the support plates in a belt shape, but the tip supporting method in the method of the present invention is not limited to this. You may support by a movable roll or a high-speed belt conveyor. Further, the supporting device may be moved in the width direction of the steel plate and inserted into the line only when the tip passes.

【0017】[0017]

【発明の効果】本発明により、テーブルロールのロール
スパンを大きくとることができるようになり、その間に
冷却水供給ヘッダを従来より多数配置することが可能と
なり、鋼板下部の冷却能力を著しく向上させ得た。
According to the present invention, the roll span of the table roll can be increased, and a larger number of cooling water supply headers can be arranged between them, which significantly improves the cooling capacity of the lower portion of the steel plate. Obtained.

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

【図1】本発明の冷却装置の操作状態を示す側断面図で
ある。
FIG. 1 is a side sectional view showing an operating state of a cooling device of the present invention.

【図2】本発明の冷却装置の操作状態を示す側断面図で
ある。
FIG. 2 is a side sectional view showing an operating state of the cooling device of the present invention.

【図3】本発明の冷却装置の鋼板支持装置部の斜視図で
ある。
FIG. 3 is a perspective view of a steel plate supporting device portion of the cooling device of the present invention.

【図4】本発明方法のフローチャート図である。FIG. 4 is a flow chart of the method of the present invention.

【図5】従来の冷却装置の側断面図である。FIG. 5 is a side sectional view of a conventional cooling device.

【図6】従来のテーブルローラと鋼板先端を示す説明図
である。
FIG. 6 is an explanatory view showing a conventional table roller and the tip of a steel plate.

【図7】従来のテーブルローラ間の鋼板先端侵入防止板
を示す側断面図である。
FIG. 7 is a side sectional view showing a conventional steel plate tip intrusion prevention plate between table rollers.

【符号の説明】[Explanation of symbols]

1 熱延鋼板 2 テーブルローラ 3 冷却水供給ヘッダ 4 支持板 5 ワイヤー 6 ロール 7 ウインチ 8 演算器 9 制御器 10 自動バルブ 1 Hot Rolled Steel Plate 2 Table Roller 3 Cooling Water Supply Header 4 Support Plate 5 Wire 6 Roll 7 Winch 8 Operator 9 Controller 10 Automatic Valve

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 熱間圧延機と巻取り機間で熱延鋼板を冷
却するに際して、鋼板搬送テーブルロール間に鋼板支持
装置を移動可能に設置し、該鋼板先端通過時の鋼板支持
を行い、該鋼板先端通過後に該鋼板支持装置を退避さ
せ、該鋼板下面へ該テーブルロール間より冷却水を噴出
することを特徴とする熱延鋼板の冷却方法。
1. When cooling a hot-rolled steel sheet between a hot rolling mill and a winding machine, a steel sheet supporting device is movably installed between the steel sheet transport table rolls to support the steel sheet when passing the steel sheet front end, A method for cooling a hot-rolled steel sheet, characterized in that the steel sheet supporting device is retracted after passing the tip of the steel sheet, and cooling water is jetted to the lower surface of the steel sheet from between the table rolls.
【請求項2】 熱間圧延機と巻取り機間に設置された熱
延鋼板冷却装置において、鋼板搬送テーブルロール間の
パスラインに沿って鋼板支持装置を移動可能に設置し、
かつ該パスラインの上下に冷却水供給ヘッダを配置した
ことを特徴とする熱延鋼板の冷却装置。
2. A hot-rolled steel sheet cooling device installed between a hot rolling mill and a winding machine, wherein a steel plate supporting device is movably installed along a path line between steel plate transport table rolls,
Further, a cooling device for hot-rolled steel sheet, wherein cooling water supply headers are arranged above and below the pass line.
【請求項3】 熱間圧延機と巻取り機間に設置された熱
延鋼板冷却装置において、鋼板搬送テーブルロール間の
パスラインに沿って鋼板支持装置を移動可能に設置し、
かつ該パスラインの上下に冷却水供給ヘッダを配置し、
かつ演算器と制御器を設け、該演算器により鋼板の先端
がテーブルロール間に進入するタイミングを計算し、そ
の計算結果に基づき該制御器により鋼板支持装置を稼働
させるとともに該上下の冷却水供給ヘッダへのバルブを
開とするようにしたことを特徴とする熱延鋼板の冷却装
置。
3. A hot-rolled steel sheet cooling device installed between a hot rolling mill and a winding machine, wherein a steel plate supporting device is movably installed along a path line between steel plate transport table rolls,
And arrange cooling water supply headers above and below the pass line,
Moreover, a calculator and a controller are provided, the calculator calculates the timing at which the tip of the steel plate enters between the table rolls, and based on the calculation result, the controller operates the steel plate supporting device and supplies the upper and lower cooling water. A cooling device for a hot-rolled steel sheet, characterized in that a valve to a header is opened.
JP28863392A 1992-10-27 1992-10-27 Method and device for cooling hot rolled steel sheet Pending JPH06134514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28863392A JPH06134514A (en) 1992-10-27 1992-10-27 Method and device for cooling hot rolled steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28863392A JPH06134514A (en) 1992-10-27 1992-10-27 Method and device for cooling hot rolled steel sheet

Publications (1)

Publication Number Publication Date
JPH06134514A true JPH06134514A (en) 1994-05-17

Family

ID=17732700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28863392A Pending JPH06134514A (en) 1992-10-27 1992-10-27 Method and device for cooling hot rolled steel sheet

Country Status (1)

Country Link
JP (1) JPH06134514A (en)

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