JP4333406B2 - Method and apparatus for cooling hot-rolled metal strip - Google Patents

Method and apparatus for cooling hot-rolled metal strip Download PDF

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JP4333406B2
JP4333406B2 JP2004051128A JP2004051128A JP4333406B2 JP 4333406 B2 JP4333406 B2 JP 4333406B2 JP 2004051128 A JP2004051128 A JP 2004051128A JP 2004051128 A JP2004051128 A JP 2004051128A JP 4333406 B2 JP4333406 B2 JP 4333406B2
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metal strip
cooling
cooling water
nozzle
width direction
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JP2005238283A (en
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陽一 冨永
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JFE Steel Corp
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本発明は、熱延金属ストリップ、特に自動車用鋼板を主体とする低温巻き取り型高張力鋼板の熱間圧延工程において幅方向の材質を均一化するのに有効な冷却方法およびその装置に関する。   The present invention relates to a cooling method and apparatus effective for uniformizing the material in the width direction in a hot rolling process of a hot-rolled metal strip, in particular, a low-temperature winding high-tensile steel sheet mainly composed of an automotive steel sheet.

金属ストリップ、例えば鋼帯の熱間圧延においては、仕上げ圧延機出側のホットランテーブルと呼ばれるローラテーブルにおいて鋼帯の上下から冷却水を噴射し、巻き取り目標温度まで冷却して巻き取り機でコイルに巻き取ることが行われている。ホットランテーブルにおける冷却で問題になるのは金属ストリップの上面に対する冷却水である。すなわち、進行方向と直角に設けたヘッダに幅方向に複数のノズルを取り付け、各ノズルから一斉に冷却水を流下させるのであるが、板面に到達した冷却水がストリップの幅方向に水流を形成するため、エッジ部に向かうほど通過水量が増加し、より多く冷却され、一般に幅方向の中心寄り部分は冷却が不足して充分低温にならず、エッジ寄り部分は冷却が充分なされて低温になるため逆V字型の温度分布となることが多い。   In the hot rolling of a metal strip, for example, a steel strip, cooling water is injected from above and below the steel strip on a roller table called a hot run table on the exit side of the finish rolling mill, cooled to the winding target temperature, and then coiled by the winder. Winding up is done. The problem with cooling in the hot run table is the cooling water for the top surface of the metal strip. In other words, a plurality of nozzles are attached in the width direction to the header provided at right angles to the traveling direction, and cooling water flows down from each nozzle all at once, but the cooling water that reaches the plate surface forms a water flow in the width direction of the strip Therefore, the amount of water passing through increases toward the edge, and it is cooled more. In general, the portion near the center in the width direction is not cooled sufficiently and the temperature near the edge is sufficiently cooled, and the portion near the edge is cooled sufficiently. Therefore, an inverted V-shaped temperature distribution is often obtained.

このような幅方向中央部とエッジ部との冷却時における温度差の解消については、従来さまざまな試みがなされてきた。例えば特許文献1には、温度降下の大きい部分に遮蔽板を移動させて幅方向に複数設けられたノズルから噴射される冷却水を遮断し、均一化を図ることが記載されている。図7によりこれを簡単に説明する。この図はホットランテーブルと呼ばれる熱間圧延設備の仕上げ圧延機出側におけるストリップSの冷却設備を示すストリップSの進行方向から見た側面図で、1は冷却水のヘッダ、11はこのヘッダ1にストリップSの幅方向に複数基設けられたノズル、Wは冷却水、4はストリップSを搬送するローラテーブル(ホットランテーブル)、6は冷却水遮蔽手段で、61は遮蔽板(可動板)、62はこの遮蔽板61をストリップSの幅方向に移動させる遮蔽板移動機構である。特許文献1に記載の発明の目的とするところは、ストリップSの幅方向の中心位置を検出し、遮蔽板移動機構62がストリップSの蛇行に追随して所望の冷却効果を達成することにあるが、その詳細は本発明と直接関係がないので省略する。特許文献2にも、図8に示すような冷却水遮蔽手段が記載されている。これらの例では、遮蔽された冷却水は遮蔽板61の上面を流下してストリップSの外側へ排出される。そしてこれらの例では遮蔽板61の内側には遮蔽効果が及ばないから、ストリップSの中心寄りが温度が高く、エッジ部分が過冷却になる場合の対策として有効であるが、逆の場合には効果がない。   Various attempts have been made in the past to eliminate the temperature difference during cooling between the widthwise central portion and the edge portion. For example, Patent Document 1 describes that a shielding plate is moved to a portion where the temperature drop is large, and cooling water sprayed from a plurality of nozzles provided in the width direction is shut off to achieve uniformity. This will be briefly described with reference to FIG. This figure is a side view seen from the traveling direction of the strip S showing the cooling equipment of the strip S on the exit side of the finish rolling mill of a hot rolling equipment called a hot run table. 1 is a header of cooling water, 11 is the header 1 A plurality of nozzles provided in the width direction of the strip S, W is cooling water, 4 is a roller table (hot run table) for transporting the strip S, 6 is cooling water shielding means, 61 is a shielding plate (movable plate), 62 Is a shielding plate moving mechanism for moving the shielding plate 61 in the width direction of the strip S. The object of the invention described in Patent Document 1 is to detect the center position of the strip S in the width direction, and the shielding plate moving mechanism 62 follows the meandering of the strip S to achieve a desired cooling effect. However, the details thereof are not directly related to the present invention, and therefore will be omitted. Patent Document 2 also describes cooling water shielding means as shown in FIG. In these examples, the shielded cooling water flows down the upper surface of the shield plate 61 and is discharged to the outside of the strip S. In these examples, since the shielding effect does not reach the inside of the shielding plate 61, it is effective as a countermeasure when the temperature near the center of the strip S is high and the edge portion is overcooled. has no effect.

一方、特許文献3には幅方向の位置に関係なく、個々のノズルに対して冷却水の流下を遮蔽することのできる冷却装置が記載されている。図9によりこれを説明する。   On the other hand, Patent Document 3 describes a cooling device that can shield the flow of cooling water from each nozzle regardless of the position in the width direction. This will be described with reference to FIG.

この図は1基のノズルのみを示すストリップSの進行方向に対して直角方向から見た冷却装置の部分正面図で、冷却水遮蔽手段6は支点66を中心に揺動するフラッパ63とこれを揺動させる空気シリンダである揺動機構64で構成されている。図の実線で示した状態ではフラッパ63はノズル11の直下にあり、ノズル11からの水流はこれに遮蔽されて流下せず、ノズル11の直下からやや離れて設けられている排水樋であるガター65に流入し、系外に排出される。またフラッパ63が図の鎖線の位置にあるときはノズル11からの水流は遮断されずにそのまま流下するので、下方のストリップSを冷却することができる。   This figure is a partial front view of the cooling device viewed from a direction perpendicular to the traveling direction of the strip S showing only one nozzle. The cooling water shielding means 6 includes a flapper 63 that swings around a fulcrum 66 and this. The swing mechanism 64 is a swinging air cylinder. In the state shown by the solid line in the figure, the flapper 63 is directly below the nozzle 11, and the water flow from the nozzle 11 is shielded by this and does not flow down. It flows into 65 and is discharged out of the system. Further, when the flapper 63 is in the position of the chain line in the figure, the water flow from the nozzle 11 flows without being blocked, so that the lower strip S can be cooled.

特許文献4に記載されている冷却装置もこれとほぼ同様の構成で、図10に示すように、相違点は水流を遮断しないときにフラッパ63が退避する方向がガター65と同じ側になっている点であり、図9の構成であると遮断状態から冷却状態に切り替わる瞬間にフラッパ63の上に滞留していた水が大量に落下して冷却温度に外乱を生じるので、作動方向を逆にすることによりこの問題点を解消したのである。いずれにせよ特許文献3および4に記載の冷却装置は個々のノズルに対して冷却水を流下させるか遮蔽するかのオンオフ制御であり、中間の流量を選択することはできないので、きめ細かい温度制御ができないという問題点があった。
特開昭64−62208号公報 特開昭61−86022号公報 実開昭61−58912号公報 特開平9−141321号公報
The cooling device described in Patent Document 4 has substantially the same configuration, and as shown in FIG. 10, the difference is that the direction in which the flapper 63 retreats is the same side as the gutter 65 when the water flow is not blocked. In the configuration shown in FIG. 9, a large amount of water staying on the flapper 63 falls at the moment of switching from the shut-off state to the cooling state, causing a disturbance in the cooling temperature. By doing so, this problem was solved. In any case, the cooling devices described in Patent Documents 3 and 4 are on / off control of whether the cooling water is allowed to flow down or shielded with respect to individual nozzles, and since an intermediate flow rate cannot be selected, fine temperature control is possible. There was a problem that it was not possible.
JP-A 64-62208 JP-A-61-86022 Japanese Utility Model Publication No. 61-58912 JP-A-9-141321

近年、高張力鋼板の需要拡大に伴い、プレス成形性の向上対策として、高炭素当量成分素材を低温で巻き取ることにより高伸び特性を達成する複合組織の高張力鋼板のニーズが高まる趨勢にある。このような低温巻き取り型鋼板の製造においては、ホットランテーブルにおいて多量の冷却水の供給が必要であり、かつ目標とする低温巻き取りを達成するには冷却能力を確保するため圧延速度を低く抑えることが必要である。したがって被圧延材の上面には冷却水が排出しきれずに滞留し、その影響により、これまでとは逆に幅方向の中心寄り部分は効率よく冷却され低温となるがエッジ寄り部分は冷却水が充分排除されないため低温にならない中央V字型の温度分布となる。図11は従来の設備のまま大水量低速圧延を行った場合の、幅方向位置と温度の関係を示すグラフである。この結果として、幅方向の材質の均一性が劣化する。これは従来の中温ないし高温巻き取りにおいては顕在化しなかった、新たな問題点である。   In recent years, with increasing demand for high-tensile steel sheets, as a measure to improve press formability, there is a growing need for high-strength steel sheets with a composite structure that achieves high elongation properties by winding high carbon equivalent component materials at low temperatures. . In the production of such a low-temperature roll-up type steel sheet, a large amount of cooling water needs to be supplied on the hot run table, and in order to achieve the target low-temperature roll-up, the rolling speed is kept low in order to ensure the cooling capacity. It is necessary. Therefore, the cooling water stays on the upper surface of the material to be rolled without being discharged, and due to the influence, the portion near the center in the width direction is efficiently cooled to a low temperature, but the cooling water is cooled at the edge portion. Since it is not sufficiently eliminated, it becomes a central V-shaped temperature distribution that does not become low temperature. FIG. 11 is a graph showing the relationship between the position in the width direction and the temperature in the case of performing large-volume low-speed rolling with conventional equipment. As a result, the uniformity of the material in the width direction is deteriorated. This is a new problem that has not become apparent in the conventional medium temperature to high temperature winding.

本発明はこの問題点を解消し、低温巻き取り型高張力鋼板の品質を向上させることのできる冷却装置を提供することを目的とする。   An object of the present invention is to provide a cooling device that can solve this problem and improve the quality of a low-temperature take-up type high-tensile steel sheet.

本発明の熱延金属ストリップの冷却方法は、金属ストリップの上方に配置されたヘッダに金属ストリップの幅方向に複数基配置されたノズルから金属ストリップに向けて冷却水を流下させる熱延金属ストリップの冷却方法において、前記ノズルと金属ストリップとの間に、前記ノズルの、少なくとも中央位置を含む金属ストリップの幅方向位置毎に、進行方向の複数のヘッダ位置にわたって、前記ノズルから流下する冷却水を一旦受け入れる冷却水量調整手段を設け、冷却水量を調整してから金属ストリップに向けて冷却水を流下させることを特徴とする。   The method for cooling a hot-rolled metal strip according to the present invention is a method for cooling a hot-rolled metal strip in which cooling water flows down from a nozzle arranged in the width direction of a metal strip toward a metal strip on a header arranged above the metal strip. In the cooling method, cooling water flowing down from the nozzle is temporarily provided between the nozzle and the metal strip over a plurality of header positions in the traveling direction for each width direction position of the metal strip including at least the center position of the nozzle. A cooling water amount adjusting means for receiving is provided, and the cooling water is made to flow toward the metal strip after adjusting the cooling water amount.

また本発明の熱間金属ストリップの冷却装置は、金属ストリップの上方に配置されたヘッダに金属ストリップの幅方向に複数基配置されたノズルから金属ストリップに向けて冷却水を流下させる熱延金属ストリップの冷却装置において、前記ノズルと金属ストリップとの間に、前記ノズルの、少なくとも中央位置を含む金属ストリップの幅方向位置毎に、進行方向の複数のヘッダ位置にわたって、前記ノズルから流下する冷却水を一旦受け入れる金属ストリップの進行方向に配置された中間樋と、この中間樋の底面に設けられた複数個の流出孔からそれぞれ下方に向けて取り付けられた下部ノズルと、中間樋の底面を水平移動して前記流出孔の上部をふさぐことのできるふさぎ部材と、このふさぎ部材を水平移動させる移動機構と、前記中間樋に沿ってこの中間樋からのオーバーフローを流入させるガターとからなる冷却水量調整手段を設けたことを特徴とする。   The hot metal strip cooling device according to the present invention is a hot-rolled metal strip that causes cooling water to flow from a plurality of nozzles arranged in the width direction of the metal strip toward a metal strip on a header arranged above the metal strip. Cooling water flowing down from the nozzle over a plurality of header positions in the traveling direction between the nozzle and the metal strip for each width direction position of the metal strip including at least the central position of the nozzle. An intermediate rod arranged in the traveling direction of the metal strip once received, a lower nozzle attached downward from each of a plurality of outflow holes provided on the bottom surface of the intermediate rod, and a bottom surface of the intermediate rod are horizontally moved. A blocking member capable of blocking the upper portion of the outflow hole, a moving mechanism for horizontally moving the blocking member, and the intermediate Characterized in that a cooling water amount adjusting means comprising a gutter for flowing overflow from the intermediate trough along.

本発明によれば、幅方向の位置にかかわりなく、各ノズルの水量が任意に調整可能であるから幅方向の温度偏差が均一化され、低温巻き取り型高張力鋼板の熱間圧延における品質が向上するばかりでなく、中温ないし高温巻き取りを行う在来の鋼種においても品質が向上するという、優れた効果を奏する。   According to the present invention, the water amount of each nozzle can be arbitrarily adjusted regardless of the position in the width direction, so that the temperature deviation in the width direction is uniformed, and the quality in hot rolling of the low-temperature winding type high-tensile steel sheet is improved. In addition to the improvement, there is an excellent effect that the quality is improved even in a conventional steel type that performs winding at a medium temperature or high temperature.

本発明においては、従来の冷却水ノズルと金属ストリップとの間に、ノズルの少なくとも中央位置を含む金属ストリップの幅方向位置毎に冷却水を一旦受け入れる中間樋を有する冷却水量調整手段を設け、ここで冷却水量を調整した上で下部ノズルから冷却水を流下させるようにして、幅方向の冷却水量分布をきめ細かく任意に制御できるようにした。   In the present invention, there is provided a cooling water amount adjusting means having an intermediate trough for temporarily receiving the cooling water at every position in the width direction of the metal strip including at least the central position of the nozzle between the conventional cooling water nozzle and the metal strip, After adjusting the amount of cooling water, the cooling water was allowed to flow down from the lower nozzle so that the cooling water amount distribution in the width direction could be finely and arbitrarily controlled.

以下金属ストリップが鋼帯である場合の熱間圧延の例で説明する。図3は本発明の冷却装置を含む鋼帯の熱間圧延設備の要部を示す正面図、図4はそのXX矢視による断面図で、1は鋼帯の進行方向と直角にテーブルローラ4の上方に配置された冷却水のヘッダ、11はこのヘッダ1に設けられたノズル、2は下面用のヘッダ、21はこれに設けられたノズル、4はホットランテーブルのテーブルローラ、5はノズルの幅方向位置毎に複数のヘッダ位置にわたって設けた冷却水量調整手段で、これについては追って詳しく説明する。51はそのうちの中間樋、52は中間樋の底面に下方に向けて取り付けられた下部ノズル、8は仕上げ圧延機の最終スタンド、9は巻き取り機、Sはストリップである。中間樋51は被圧延材の進行方向に少なくとも2以上の複数のヘッダ1にまたがり連続しており、かつ幅方向にはノズル11に対応して同じ数だけ別個に設けられる。   Hereinafter, an example of hot rolling when the metal strip is a steel strip will be described. FIG. 3 is a front view showing the main part of a steel strip hot rolling facility including the cooling device of the present invention, FIG. 4 is a sectional view taken along the line XX, and 1 is a table roller 4 perpendicular to the traveling direction of the steel strip. 1 is a nozzle provided in the header 1, 2 is a header for the lower surface, 21 is a nozzle provided on the header, 4 is a table roller of the hot run table, and 5 is a nozzle of the nozzle This is a cooling water amount adjusting means provided over a plurality of header positions for each position in the width direction, and will be described in detail later. 51 is an intermediate rod, 52 is a lower nozzle attached downward to the bottom surface of the intermediate rod, 8 is a final stand of a finish rolling mill, 9 is a winder, and S is a strip. The intermediate ribs 51 are continuous across at least two or more headers 1 in the traveling direction of the material to be rolled, and are provided separately by the same number corresponding to the nozzles 11 in the width direction.

冷却能力でいま問題になっているのは水が板面に滞留する上面の冷却であり下面は問題がないので、本発明は上面の冷却に関するものであり、これらの図に見るように冷却水は従来のノズル11から流下したのち一旦中間樋51に入り、ここで流量を調整されて下部ノズル52から流下してストリップSを冷却する。   The problem with the cooling capacity is the cooling of the upper surface where water stays on the plate surface and there is no problem with the lower surface. Therefore, the present invention relates to the cooling of the upper surface. After flowing down from the conventional nozzle 11, it once enters the intermediate rod 51, where the flow rate is adjusted, and the strip S is cooled down by flowing down from the lower nozzle 52.

図1はヘッダ1および本発明の冷却水量調整手段5を示す斜視図、図2は同じく断面図で、これまでに説明したものの他53は中間樋51に沿って中間樋51よりもやや低い位置に設けられたガター、54は中間樋51底面に設けられた下部ノズル52への流出孔の位置に配置され、流出孔の上部をふさぐことのできるふさぎ部材、55はこのふさぎ部材を図2の太い矢印方向に水平移動させるアクチュエータ等の移動機構である。移動機構は前進、後退の2位置のみでなく、任意の中間位置をも保持しうる機能のものが必要である。   FIG. 1 is a perspective view showing the header 1 and the cooling water amount adjusting means 5 of the present invention, FIG. 2 is a sectional view of the same, and the other 53 described so far is positioned along the intermediate rod 51 slightly lower than the intermediate rod 51. 2 is arranged at the position of the outflow hole to the lower nozzle 52 provided on the bottom surface of the intermediate rod 51, and is a blocking member that can block the upper part of the outflow hole, and 55 is the blocking member shown in FIG. It is a moving mechanism such as an actuator that moves horizontally in the direction of the thick arrow. The moving mechanism needs to have a function capable of holding not only the forward and backward positions but also any intermediate position.

図2において、ノズル11からの冷却水aは一旦中間樋51に流入する。中間樋51底部の下部ノズル52への流出孔の位置には前記したとおりふさぎ部材54が配置されており、その位置によって流出孔の開口面積を全閉から全開まで中間位置を含め任意に変化させることができる。この開口面積によって調整された流量の水cが下部ノズル52から流下し、オーバーフローした水bはガター53に流出し、系外に排出される。   In FIG. 2, the cooling water a from the nozzle 11 once flows into the intermediate pool 51. As described above, the blocking member 54 is disposed at the position of the outflow hole to the lower nozzle 52 at the bottom of the intermediate rod 51, and the opening area of the outflow hole is arbitrarily changed from the fully closed position to the fully opened position depending on the position. be able to. Water c having a flow rate adjusted by the opening area flows down from the lower nozzle 52, and the overflowed water b flows out to the gutter 53 and is discharged out of the system.

本発明の冷却は図11に示した従来例における中央V字型の温度分布を是正するのが主眼であるから、中央部の冷却を抑制することが必要であり、冷却制御は少なくとも中央位置を含む鋼帯の幅方向において行うことが重要である。従来技術による比較例と本発明による実施例との操業条件ならびに測定した幅方向温度偏差を表1に示す。さきに示した図11のグラフは比較例2に対するものであり、一方図5は実施例2に対応するグラフである。表1からもわかるように幅方向温度偏差は従来法のときの80〜180℃に対して40〜50℃であり、従来の1/3ないし1/4に減少している。また図5からわかるように測定された温度偏差も幅方向に見て特に何らかの傾向は示しておらず、ばらつきの範囲と考えられる。   Since the cooling of the present invention is mainly intended to correct the central V-shaped temperature distribution in the conventional example shown in FIG. 11, it is necessary to suppress the cooling of the central portion, and the cooling control is performed at least at the central position. It is important to carry out in the width direction of the steel strip. Table 1 shows operating conditions and measured temperature deviations in the width direction between the comparative example according to the prior art and the example according to the present invention. The graph of FIG. 11 shown above is for Comparative Example 2, while FIG. 5 is a graph corresponding to Example 2. As can be seen from Table 1, the temperature deviation in the width direction is 40 to 50 ° C. with respect to 80 to 180 ° C. in the conventional method, and is reduced to 1/3 to 1/4 of the conventional method. Further, as can be seen from FIG. 5, the measured temperature deviation does not show any particular tendency in the width direction, and is considered to be a range of variation.

なお、幅方向の中央より部分、例えば幅方向中央部を含む鋼帯幅の1/3の範囲のみで本発明を実施し、エッジ部分は従来どおりのノズル冷却を行った場合も中央V字型の温度分布は改善され、品質均一化の効果が認められる。その一例を図6に示す。   It should be noted that the present invention is carried out only in the range from the center in the width direction, for example, in the range of 1/3 of the width of the steel strip including the center in the width direction, and the edge portion is the center V-shaped even when nozzle cooling is performed as usual The temperature distribution is improved and the effect of uniform quality is recognized. An example is shown in FIG.

以上、低温巻き取り型高張力鋼板の熱間圧延の場合を例として説明したが、本発明においては幅方向の位置にかかわりなくノズルの水量が任意に調整可能であるから、温度偏差が逆パターンとなる在来の中温ないし高温巻き取りを行う鋼種の冷却においても温度偏差の解消に有効であることはいうまでもない。   As described above, the case of hot rolling of a low-temperature winding type high-tensile steel sheet has been described as an example. Needless to say, it is effective in eliminating the temperature deviation even in the cooling of the steel type that performs conventional medium-temperature to high-temperature winding.

本発明の実施例における冷却装置の要部を示す斜視図である。It is a perspective view which shows the principal part of the cooling device in the Example of this invention. 本発明の実施例における冷却装置の要部を示す断面図である。It is sectional drawing which shows the principal part of the cooling device in the Example of this invention. 本発明の実施例における熱間圧延設備の要部を示す正面図である。It is a front view which shows the principal part of the hot rolling equipment in the Example of this invention. 図3のXX矢視による断面図である。FIG. 4 is a cross-sectional view taken along the line XX in FIG. 3. 本発明の実施例における幅方向位置と温度の関係を示すグラフである。It is a graph which shows the relationship of the width direction position and temperature in the Example of this invention. 本発明の他の実施例における幅方向位置と温度の関係を示すグラフである。It is a graph which shows the relationship of the width direction position and temperature in the other Example of this invention. 従来の技術における熱間圧延設備の冷却設備を示す断面図である。It is sectional drawing which shows the cooling equipment of the hot rolling equipment in a prior art. 同じく従来の技術における熱間圧延設備の冷却設備を示す断面図である。It is sectional drawing which similarly shows the cooling equipment of the hot rolling equipment in a prior art. 従来の技術における熱間圧延設備の冷却装置を示す部分正面図である。It is a partial front view which shows the cooling device of the hot rolling equipment in a prior art. 同じく従来の技術における熱間圧延設備の冷却装置を示す部分正面図である。It is a partial front view which similarly shows the cooling device of the hot rolling equipment in a prior art. 従来の技術における幅方向位置と温度の関係を示すグラフである。It is a graph which shows the relationship of the width direction position and temperature in the prior art.

符号の説明Explanation of symbols

1 ヘッダ
2 下面用ヘッダ
3 受け樋
4 ローラテーブル
5 冷却水量調整手段
6 冷却水遮蔽手段
8 (仕上げ圧延機の)最終スタンド
9 巻き取り機
11、21 ノズル
51 中間樋
52 下部ノズル
53、65 ガター
54 ふさぎ部材
55 移動機構
61 遮蔽板(可動板)
62 遮蔽板移動機構
63 フラッパ
64 揺動機構
66 支点
W 冷却水
S ストリップ(金属ストリップ)
DESCRIPTION OF SYMBOLS 1 Header 2 Header for lower surface 3 Receptacle 4 Roller table 5 Cooling water amount adjusting means 6 Cooling water shielding means 8 Final stand (of finishing rolling mill) 9 Winding machine
11, 21 nozzles
51 Intermediate
52 Lower nozzle
53, 65 Gutter
54 Covering material
55 Movement mechanism
61 Shield plate (movable plate)
62 Shield moving mechanism
63 Flapper
64 Swing mechanism
66 Support point W Cooling water S Strip (metal strip)

Claims (2)

金属ストリップの上方に配置されたヘッダに金属ストリップの幅方向に複数基配置されたノズルから金属ストリップに向けて冷却水を流下させる熱延金属ストリップの冷却方法において、前記ノズルと金属ストリップとの間に、前記ノズルの、少なくとも中央位置を含む金属ストリップの幅方向位置毎に、進行方向の複数のヘッダ位置にわたって、前記ノズルから流下する冷却水を一旦受け入れる冷却水量調整手段を設け、冷却水量を調整してから金属ストリップに向けて冷却水を流下させることを特徴とする熱延金属ストリップの冷却方法。   In the method for cooling a hot-rolled metal strip, a plurality of nozzles arranged in the width direction of the metal strip on a header arranged above the metal strip flow down toward the metal strip. In addition, for each width position of the metal strip including at least the center position of the nozzle, there is provided a cooling water amount adjusting means for temporarily receiving cooling water flowing down from the nozzle over a plurality of header positions in the traveling direction, thereby adjusting the cooling water amount. Then, the cooling method for cooling the hot-rolled metal strip is characterized in that the cooling water flows down toward the metal strip. 金属ストリップ(S)の上方に配置されたヘッダ(1)に金属ストリップ(S)の幅方向に複数基配置されたノズル(11)から金属ストリップ(S)に向けて冷却水を流下させる熱延金属ストリップの冷却装置において、前記ノズル(11)と金属ストリップ(S)との間に、前記ノズル(11)の、少なくとも中央位置を含む金属ストリップ(S)の幅方向位置毎に、進行方向の複数のヘッダ(1)位置にわたって、
前記ノズル(11)から流下する冷却水を一旦受け入れる金属ストリップ(S)の進行方向に配置された中間樋(51)と、この中間樋(51)の底面に設けられた複数個の流出孔からそれぞれ下方に向けて取り付けられた下部ノズル(52)と、中間樋(51)の底面を水平移動して前記流出孔の上部をふさぐことのできるふさぎ部材(54)と、このふさぎ部材(54)を水平移動させる移動機構(55)と、前記中間樋(51)に沿ってこの中間樋(51)からのオーバーフローを流入させるガター(53)とからなる冷却水量調整手段(5)
を設けたことを特徴とする熱間金属ストリップの冷却装置。
Hot rolling for flowing cooling water from a plurality of nozzles (11) arranged in the width direction of the metal strip (S) toward the metal strip (S) on the header (1) arranged above the metal strip (S). In the metal strip cooling device, the nozzle (11) is disposed between the nozzle (11) and the metal strip (S) at each position in the width direction of the metal strip (S) including at least the center position. Over multiple header (1) locations,
An intermediate rod (51) disposed in the traveling direction of the metal strip (S) that once receives the cooling water flowing down from the nozzle (11), and a plurality of outflow holes provided on the bottom surface of the intermediate rod (51) A lower nozzle (52) mounted downward, a blocking member (54) capable of horizontally moving the bottom surface of the intermediate rod (51) to block the upper part of the outflow hole, and the blocking member (54) A cooling water amount adjusting means (5) comprising a moving mechanism (55) for horizontally moving the water and a gutter (53) for introducing an overflow from the intermediate rod (51) along the intermediate rod (51)
A device for cooling a hot metal strip, comprising:
JP2004051128A 2004-02-26 2004-02-26 Method and apparatus for cooling hot-rolled metal strip Expired - Fee Related JP4333406B2 (en)

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Publication number Priority date Publication date Assignee Title
US9486959B2 (en) 2013-02-22 2016-11-08 The Yokohama Rubber Co., Ltd. Method for producing laminate

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KR102075193B1 (en) * 2016-12-12 2020-02-07 주식회사 포스코 Apparatus and method for rolling

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9486959B2 (en) 2013-02-22 2016-11-08 The Yokohama Rubber Co., Ltd. Method for producing laminate

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