JP2003136122A - Slow cooling apparatus of hot rolled wire - Google Patents
Slow cooling apparatus of hot rolled wireInfo
- Publication number
- JP2003136122A JP2003136122A JP2001333440A JP2001333440A JP2003136122A JP 2003136122 A JP2003136122 A JP 2003136122A JP 2001333440 A JP2001333440 A JP 2001333440A JP 2001333440 A JP2001333440 A JP 2001333440A JP 2003136122 A JP2003136122 A JP 2003136122A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- conveyor
- shaped wire
- hot
- wire rod
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱間圧延徐冷装置
に係り、具体的には合金鋼等の熱間圧延線材の軟質化を
オンライン上において実現するために、２連のコンベア
を異なる搬送速度で運転し、上流側のコンベアでは徐冷
対象のリング状線材を比較的低密度の重畳状態で搬送
し、下流側のコンベアではリング状線材を比較的高密度
の重畳状態で搬送し、更に下流側のコンベアでは徐冷速
度を制御するための加熱ヒータを設けて所定の徐冷速度
での徐冷を可能とした熱間圧延線材の徐冷装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot rolling gradual cooling device, and specifically, to realize softening of a hot rolled wire rod such as an alloy steel on-line, two conveyors are different. Operates at a transport speed, the upstream conveyor conveys the ring-shaped wire to be slowly cooled in a relatively low-density superposed state, and the downstream conveyor conveys the ring-shaped wire in a relatively high-density superposed state, Further, the present invention relates to a gradual cooling device for a hot-rolled wire rod, which is provided with a heater for controlling the gradual cooling speed on the downstream side conveyor and enables gradual cooling at a predetermined gradual cooling speed.
【０００２】[0002]
【従来の技術】熱間圧延した直線状の線材をコイル状に
して徐冷するための従来技術として特公昭６０−４５２
５２号公報に記載の技術（以下、従来例１とする。）が
知られている。従来例１は、リング状線材をその搬送方
向に段階的な温度勾配を持たせた搬送雰囲気内を搬送す
ると共に、この搬送雰囲気内での過加熱を防止する外気
吹込み制御、リング状線材の搬送方向に直交する幅方向
両端でのリング状線材密度の高い部分の冷却を促進する
冷媒吹付け制御、リング状線材の過冷部（リング状線材
中央部のリング状線材密度の低い部分、及び、搬送方向
の先端と後端におけるリング状線材密度の低い非定常
部）での熱補償をする熱補償制御をすることにより、リ
ング状線材の全長に亘り均一な徐冷を実現しようとする
技術である。2. Description of the Related Art As a conventional technique for gradually cooling a hot-rolled linear wire into a coil, Japanese Patent Publication No. 60-452.
The technique described in Japanese Patent No. 52 (hereinafter, referred to as Conventional Example 1) is known. In the conventional example 1, the ring-shaped wire rod is transported in a transport atmosphere having a stepwise temperature gradient in the transport direction, and the outside air blowing control for preventing overheating in the transport atmosphere is performed. Refrigerant spraying control that promotes cooling of the high density portion of the ring-shaped wire rod at both ends in the width direction orthogonal to the transport direction, a supercooled portion of the ring-shaped wire rod (a low-density portion of the ring-shaped wire rod at the center of the ring-shaped wire rod, and , A technique to achieve uniform gradual cooling over the entire length of the ring-shaped wire rod by performing heat compensation control to perform heat compensation at the leading and trailing ends of the ring-shaped wire rod at the end where the density of the ring-shaped wire rod is low) Is.
【０００３】又、従来例１の他に特開平１０−１５６４
１７号公報に記載の技術（以下、従来例２とする。）が
知られている。従来例２は、リング状線材を搬送する手
段であるコンベアの上部にカバーを設け、そのカバー内
面に加熱ヒータを装着して、周囲とは異なる搬送雰囲気
の領域を形成し、更にこの加熱ヒータを搬送方向の長さ
方向及び幅方向において複数に分割し、同様に搬送方向
の長さ方向及び幅方向において複数配置した温度計によ
りリング状線材の温度を測定して、その測定温度値に基
づいて必要な演算を行い、加熱ヒータの温度制御を行う
ことにより、リング状線材の全長に亘り均一な徐冷を実
現しようとする技術である。In addition to the prior art example 1, Japanese Patent Laid-Open No. 10-1564
The technique described in Japanese Patent No. 17 (hereinafter referred to as Conventional Example 2) is known. In the conventional example 2, a cover is provided on an upper portion of a conveyor which is a means for conveying a ring-shaped wire, and a heater is attached to the inner surface of the cover to form a region of a conveyance atmosphere different from the surroundings. The temperature of the ring-shaped wire is measured by a thermometer that is divided into a plurality of parts in the length direction and width direction of the carrying direction and similarly arranged in the length direction and width direction of the carrying direction, and based on the measured temperature value. This is a technique for achieving uniform gradual cooling over the entire length of the ring-shaped wire rod by performing necessary calculations and controlling the temperature of the heater.
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来例１にお
ける熱間圧延線材の徐冷技術では、設備が大規模で複雑
になり、全体として高価な設備になる。リング状線材の
搬送方向に直交する幅方向両端でのリング状線材密度の
高い部分の冷却を促進する冷媒吹付けは、吹付け面側の
みを冷却することになり、逆に温度差を大きくしてしま
う。コンベア間の段差により、リング状線材をほぐすこ
とにより、冷媒をリング状線材の全体に均一に接触する
ようにしているが、十分ではない。リング状線材の過冷
部での熱補償をする熱補償制御をするためには、リング
状線材の位置を正確にトラッキングする必要があり、制
御が複雑になる。等々の多くの問題があった。However, the gradual cooling technique for the hot-rolled wire rod in Conventional Example 1 requires a large-scale and complicated facility, resulting in an expensive facility as a whole. Refrigerant spraying that promotes the cooling of the dense ring-shaped wire at both ends in the width direction orthogonal to the transport direction of the ring-shaped wire is to cool only the spray surface side, and conversely increase the temperature difference. Will end up. The refrigerant is uniformly contacted with the entire ring-shaped wire rod by loosening the ring-shaped wire rod by the step between the conveyors, but this is not sufficient. In order to perform heat compensation control for performing heat compensation in the supercooled portion of the ring-shaped wire, it is necessary to accurately track the position of the ring-shaped wire, which complicates the control. There were many problems, etc.
【０００５】又、従来例２における熱間圧延線材の徐冷
技術では、加熱ヒータを、搬送方向と直交する幅方向に
おいて、リング状線材のリング径に対し２５％乃至７５
％の範囲に限定していることから、カバーの搬送方向両
端での温度降下が大きく、特に細径サイズのリング状線
材に対しては、その搬送方向での先端部及び後端部での
非定常部分においては徐冷が十分できない。搬送手段と
してのコンベアが１台のみであり、徐冷時のリング状線
材密度は徐冷開始から徐冷終了まで固定されて搬送され
ることから、搬送方向におけるコイル中央部のリング状
線材密度の低い部分とコイル両端部のリング状線材密度
の高い部分との間での温度差が大きくなり、結果的にリ
ング状線材全長内での軟質化のばらつきが大きくなる。
加熱ヒータの長さ方向及び幅方向での制御分割数が多く
制御が複雑になり、高価な設備になる。等々の問題があ
った。Further, in the slow cooling technique for hot-rolled wire rods in Conventional Example 2, the heating heater is 25% to 75% of the ring diameter of the ring-shaped wire rod in the width direction orthogonal to the conveying direction.
%, The temperature drop at both ends of the cover in the transport direction is large, and especially for small-diameter ring-shaped wire rods, the temperature at the front end and the rear end in the transport direction is small. Slow cooling cannot be performed sufficiently in the steady part. Since there is only one conveyor as a conveying means, and the ring-shaped wire density at the time of slow cooling is fixed and transferred from the start of slow cooling to the end of slow cooling, the ring-shaped wire density at the center of the coil in the transfer direction is The temperature difference between the low portion and the high density portion of the ring-shaped wire rod at both ends of the coil becomes large, resulting in large variation in softening within the entire length of the ring-shaped wire rod.
Since the number of control divisions in the length direction and the width direction of the heater is large, the control becomes complicated, resulting in expensive equipment. There were problems, etc.
【０００６】本発明は斯かる事情に鑑みなされたもので
あり、その目的とするところは簡単な構成、即ち簡単な
制御及び安価な設備により、均一な徐冷を実現し、合金
鋼等の熱間圧延線材の均一な軟質化をオンライン上にお
いて実現可能な熱間圧延線材の徐冷装置を提供すること
にある。The present invention has been made in view of the above circumstances, and its object is to realize uniform gradual cooling by a simple structure, that is, simple control and inexpensive equipment, and heat the alloy steel. An object of the present invention is to provide a gradual cooling device for hot-rolled wire rods that can realize uniform softening of hot-rolled wire rods online.
【０００７】また、本発明の他の目的は、冷却速度の制
御が可能であり、又最適な徐冷速度の実現が可能な熱間
圧延線材の徐冷装置を提供することにある。Another object of the present invention is to provide a gradual cooling device for a hot-rolled wire which can control the cooling rate and can realize an optimum slow cooling rate.
【０００８】[0008]
【課題を解決するための手段】第１発明に係る熱間圧延
線材の徐冷装置は、熱間圧延されたリング状線材を第１
搬送速度により搬送する第１コンベアと、該第１コンベ
アの下流側に配置され前記リング状線材を第１搬送速度
より遅い第２搬送速度により搬送する第２コンベアと、
該第２コンベアの上部空間を覆う徐冷カバーと、該徐冷
カバーの内面上部に設けられた加熱ヒータとを備えたこ
とを特徴とする。According to a first aspect of the present invention, there is provided an apparatus for gradually cooling a hot-rolled wire rod, wherein a hot-rolled ring-shaped wire rod is firstly provided.
A first conveyor which conveys at a conveying speed, and a second conveyor which is arranged on the downstream side of the first conveyor and conveys the ring-shaped wire rod at a second conveying speed lower than the first conveying speed,
A slow cooling cover that covers an upper space of the second conveyor and a heater provided on an upper portion of an inner surface of the slow cooling cover are provided.
【０００９】第２発明に係る熱間圧延線材の徐冷装置
は、第１発明において、前記加熱ヒータは、搬送方向に
直交する幅方向において、リング状線材のリング径の８
０％乃至１３５％に対応する範囲に配置されたことを特
徴とする。A slow rolling apparatus for hot-rolled wire according to a second aspect of the present invention is the apparatus for cooling a hot-rolled wire according to the first aspect, wherein the heater has a ring diameter of 8 of the ring-shaped wire in the width direction orthogonal to the conveying direction.
It is characterized by being arranged in a range corresponding to 0% to 135%.
【００１０】第３発明に係る熱間圧延線材の徐冷装置
は、第１発明又は第２発明において、前記第１コンベア
は、前記リング状線材を第１重畳状態により搬送して第
１温度まで冷却し、前記第２コンベアは、前記リング状
線材を第１重畳状態より重畳密度の高い第２重畳状態に
より搬送して第１温度より低い第２温度の雰囲気中で徐
冷する構成としたことを特徴とする。In the slow cooling device for a hot-rolled wire according to the third invention, in the first invention or the second invention, the first conveyor conveys the ring-shaped wire in a first overlapping state to a first temperature. Cooling, the second conveyor is configured to convey the ring-shaped wire rod in a second superposition state having a higher superposition density than the first superposition state and gradually cool in an atmosphere of a second temperature lower than the first temperature. Is characterized by.
【００１１】第４発明に係る熱間圧延線材の徐冷装置
は、第３発明において、前記第２コンベアにおける徐冷
速度は、１０乃至５０℃／ｍｉｎであることを特徴とす
る。The slow-cooling device for a hot-rolled wire according to the fourth invention is characterized in that, in the third invention, the slow-cooling rate in the second conveyor is 10 to 50 ° C./min.
【００１２】第１発明においては、搬送経路の上流側に
配置し搬送速度を比較的高速に設定した第１コンベアに
よりリング状線材を重畳密度の低い疎状態にして載置移
送できるので、搬送方向に直交する幅方向におけるリン
グ状線材の端部の重畳密度と中央部の重畳密度との差を
比較的小さくでき、リング状線材の全長に亘って均一に
所定温度まで冷却できることから、均一に冷却したリン
グ状線材を搬送経路の下流側に配置した第２コンベアに
移送でき、更に、第２コンベアにおいては搬送速度を比
較的低速に設定したことから、リング状線材を重畳密度
の比較的高い密状態にして載置移送でき、リング状線材
の熱容量を大きくした状態のもとで加熱ヒータにより加
熱しつつ徐冷することができるので、リング状線材の全
長に亘って均一で所望範囲内の徐冷速度に制御すること
が可能な熱間圧延線材の徐冷装置の提供ができる。In the first aspect of the invention, the ring-shaped wire can be placed and transferred in a sparse state with a low superposition density by the first conveyor which is arranged on the upstream side of the transfer path and whose transfer speed is set to a relatively high speed. Since the difference between the overlapping density at the end of the ring-shaped wire and the overlapping density at the center in the width direction orthogonal to the can be made relatively small, and the entire length of the ring-shaped wire can be uniformly cooled to a predetermined temperature, uniform cooling is possible. The ring-shaped wire can be transferred to the second conveyor arranged on the downstream side of the transfer path, and the transfer speed of the second conveyor is set to a relatively low speed. It can be placed and transferred in a state and can be gradually cooled while being heated by a heater under the condition that the heat capacity of the ring-shaped wire is increased, so that it can be evenly distributed over the entire length of the ring-shaped wire. It can provide a slow cooling apparatus between which can control the cooling rate in Nozomu range hot rolled wire rod.
【００１３】第２発明においては、加熱ヒータの配置範
囲を、搬送方向に直交する幅方向において、リング状線
材のリング径の８０％乃至１３５％に対応する範囲に配
置したので、搬送方向に直交する幅方向における温度分
布の均一化ができ、より均一な徐冷とより正確な徐冷速
度の制御が可能な熱間圧延線材の徐冷装置の提供ができ
る。In the second aspect of the invention, the heaters are arranged in a range corresponding to 80% to 135% of the ring diameter of the ring-shaped wire rod in the width direction orthogonal to the conveyance direction. It is possible to provide a gradual cooling device for a hot-rolled wire rod that can make the temperature distribution in the width direction uniform and can control more uniform gradual cooling and more accurate gradual cooling rate.
【００１４】第３発明においては、リング状線材を第１
コンベアにより第１重畳状態で所定温度まで冷却し、第
２コンベアにおいては第１重畳状態より高密度の第２重
畳状態で更に低い温度で徐冷することにより、より確実
で均一な徐冷速度の実現が可能な熱間圧延線材の徐冷装
置の提供ができる。In the third invention, the ring-shaped wire is the first.
The first superimposition state is cooled to a predetermined temperature by the conveyor, and the second conveyor is gradually cooled at a lower temperature in the second superposition state having a higher density than the first superposition state, so that a more reliable and uniform slow cooling rate is obtained. It is possible to provide a gradual cooling device for a hot-rolled wire that can be realized.
【００１５】第４発明においては、徐冷速度を所定の範
囲内に制御することとしたので、熱間圧延線材の均一な
軟質化をより確実に実現することが可能な熱間圧延線材
の徐冷装置の提供ができる。In the fourth aspect of the invention, since the slow cooling rate is controlled within a predetermined range, it is possible to more reliably realize uniform softening of the hot rolled wire rod. A cooling device can be provided.
【００１６】[0016]
【発明の実施の形態】以下本発明をその実施の形態を示
す図面に基づいて詳述する。図１は、熱間圧延線材の製
造設備の全体概略図である。図において、１は加熱炉で
あり、熱間圧延線材の搬送方向（矢印Ａ）に、更に、粗
列圧延機２、中間列圧延機３、仕上圧延機４が配置さ
れ、加熱炉１により加熱された鋼片は順次、粗列圧延機
２、中間列圧延機３、仕上圧延機４において圧延され所
定の径を有する直線状の熱間圧延線材Ｌが形成される。
この直線状の熱間圧延線材Ｌは捲取装置５により非同心
リング状に捲き取りされ、更に徐冷装置となるステルモ
アコンベア６により搬送徐冷され、搬送経路終端のリフ
ォームステーション７において集束される。尚、圧延列
数は１乃至４系列圧延が一般的であるが、ここでは２系
列の圧延設備を示している。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. FIG. 1 is an overall schematic view of a hot-rolled wire manufacturing facility. In the figure, reference numeral 1 denotes a heating furnace, which is further provided with a rough row rolling mill 2, an intermediate row rolling mill 3, and a finishing rolling mill 4 in the conveying direction of the hot rolled wire rod (arrow A), and heating by the heating furnace 1 is performed. The formed steel pieces are sequentially rolled by the rough rolling mill 2, the intermediate rolling mill 3, and the finishing rolling mill 4 to form a linear hot-rolled wire L having a predetermined diameter.
The linear hot-rolled wire L is wound into a non-concentric ring shape by the winding device 5, further conveyed and gradually cooled by the Stelmore conveyor 6 serving as a slow cooling device, and then bundled at the reform station 7 at the end of the transport path. It The number of rolling rows is generally 1 to 4 series rolling, but here, two series rolling equipment is shown.
【００１７】図２は、本発明に係る熱間圧延線材の徐冷
装置を示す概略側面図である。図１と同一の部分は同一
の符号を付して、詳細な説明は省略する。第１コンベア
９及び第２コンベア１０は、図１において、ステルモア
コンベア６とした徐冷装置に相当する。第１コンベア９
及び第２コンベア１０は、各々ローラテーブル８により
構成されているが、これに限るものではなく、例えば、
チェーン方式のコンベアでも良い。第１コンベア９と第
２コンベア１０は、各々独立に駆動される構成にし、搬
送速度を各々自由に制御できるようにした。第１コンベ
ア９と第２コンベア１０との間には、コンベア間段差１
１が設けられている。コンベア間段差１１は、１カ所に
限る必要は無く、必要に応じ適宜他の場所に設けても良
い。更に、第２コンベア１０の上部空間を覆って徐冷カ
バーが設けられている。FIG. 2 is a schematic side view showing an annealing device for a hot-rolled wire according to the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. The first conveyor 9 and the second conveyor 10 correspond to the slow cooling device which is the Stelmore conveyor 6 in FIG. 1. First conveyor 9
The second conveyor 10 and the second conveyor 10 are each configured by the roller table 8, but the present invention is not limited to this, and, for example,
A chain type conveyor may be used. The first conveyor 9 and the second conveyor 10 are configured to be driven independently of each other so that the transport speed can be freely controlled. Between the first conveyor 9 and the second conveyor 10, there is a step 1 between the conveyors.
1 is provided. The step 11 between the conveyors need not be limited to one place, and may be provided at another place as needed. Further, a slow cooling cover is provided to cover the upper space of the second conveyor 10.
【００１８】直線状の熱間圧延線材Ｌは、捲取装置５に
より、非同心リング状に捲き取りされ、第１搬送速度に
より搬送する第１コンベア９の上に非同心リング状にリ
ング状線材１２として載置展開される。第１搬送速度
は、熱間圧延線材の径等によりある程度定まるが、例え
ば、リング状線材１２の線材直径１２．３ｍｍで０．３
ｍ／ｓｅｃとした。この速度においては、リング状線材
１２の搬送方向における中心を比較的高速に移動させる
ことができ、第１重畳状態として比較的疎の状態に重畳
させることになり、搬送方向に直交する幅方向における
リング状線材１２の端部の重畳密度と中央部の重畳密度
との差を比較的小さくでき、リング状線材１２の全長に
亘って均一に所定温度（第１温度）まで冷却できること
から結果として全体的に均一な冷却ができる。尚、第１
温度は、例えば、約７２５℃±２５℃程度になるように
設定した。The linear hot-rolled wire L is wound by the winding device 5 into a non-concentric ring shape, and the non-concentric ring-shaped ring wire is placed on the first conveyor 9 which is conveyed at the first conveying speed. Placed and deployed as 12. The first conveying speed is determined to some extent by the diameter of the hot-rolled wire rod or the like, but is 0.3 for a wire rod diameter of the ring-shaped wire rod 12 of 12.3 mm.
It was set to m / sec. At this speed, the center of the ring-shaped wire 12 in the transport direction can be moved at a relatively high speed, and the ring-shaped wire 12 is superimposed in a relatively sparse state as the first superposition state, and in the width direction orthogonal to the transport direction. The difference between the overlapping density of the end portion and the overlapping density of the central portion of the ring-shaped wire 12 can be made relatively small, and the entire length of the ring-shaped wire 12 can be uniformly cooled to a predetermined temperature (first temperature). Can be uniformly cooled. The first
The temperature was set to be, for example, about 725 ° C. ± 25 ° C.
【００１９】第１コンベア９の終端部に搬送されたリン
グ状線材１２は、コンベア間段差１１において、第１搬
送速度より遅い第２搬送速度により搬送する第２コンベ
ア１０に移載される。コンベア間段差１１は、リング状
線材１２のリング径その他の仕様等に応じて適宜調整す
ることができるように、可変方式とした。第２搬送速度
は、徐冷速度の設定値等により、ある程度定まるが、例
えば、リング状線材１２の線材直径１２．３ｍｍで０．
０５ｍ／ｓｅｃとした。この速度においては、リング状
線材１２の搬送方向における中心を比較的低速に移動さ
せることができ、第２重畳状態として比較的密の状態に
重畳させることになり、搬送方向におけるリング状線材
１２の重畳密度を比較的大きくできることから、リング
状線材１２の熱容量を大きくすることができ、結果とし
て全長に亘って徐冷速度を更に正確に制御でき全体的に
均一な冷却ができることになる。The ring-shaped wire 12 conveyed to the end of the first conveyor 9 is transferred to the second conveyor 10 which conveys at the second conveyor speed lower than the first conveyor speed at the step 11 between the conveyors. The inter-conveyor step 11 is of a variable type so that it can be appropriately adjusted according to the ring diameter of the ring-shaped wire 12 and other specifications. The second transport speed is determined to some extent by the set value of the slow cooling speed and the like, but for example, when the wire diameter of the ring-shaped wire 12 is 12.3 mm, it is 0.
It was set to 05 m / sec. At this speed, the center of the ring-shaped wire 12 in the transport direction can be moved at a relatively low speed, and the ring-shaped wire 12 is superimposed in a relatively dense state as the second superposition state. Since the superposition density can be made relatively large, the heat capacity of the ring-shaped wire 12 can be increased, and as a result, the slow cooling rate can be controlled more accurately over the entire length, and uniform cooling can be performed overall.
【００２０】第２コンベア１０には、その上部空間を徐
冷カバー１３により覆い、外部環境からの過冷却を防止
する構成としている。又、徐冷カバー１３の内面上部に
は加熱ヒータ１４（図４参照）を設け、徐冷速度の調整
ができるようにした。The upper space of the second conveyor 10 is covered with a slow cooling cover 13 to prevent overcooling from the external environment. Further, a heater 14 (see FIG. 4) is provided above the inner surface of the slow cooling cover 13 so that the slow cooling rate can be adjusted.
【００２１】図３は、リング状線材１２の搬送時の重畳
状態を示す平面図である。熱間圧延線材の搬送方向Ａに
おいて、リング状線材１２の先端部にはリング状線材非
定常部１６が、中央部にはリング状線材中央部１７が、
後端部にはリング状線材非定常部１８が形成される。
又、熱間圧延線材の搬送方向Ａに直交する幅方向におけ
るリング状線材１２の端部にはリング状線材パス端部１
９が、中央部にはリング状線材パス中央部２０が形成さ
れる。熱間圧延線材の搬送方向Ａにおいて、リング状線
材非定常部１６、１８の領域は、リング状線材１２の重
畳状態が疎であるのに対し、リング状線材中央部１７の
領域は密となる。又、熱間圧延線材の搬送方向Ａに直交
する幅方向において、リング状線材パス端部１９の領域
は、リング状線材１２の重畳状態が密であるのに対し、
リング状線材パス中央部２０の領域は疎となる。FIG. 3 is a plan view showing a superposed state when the ring-shaped wire 12 is conveyed. In the transport direction A of the hot-rolled wire rod, the ring-shaped wire rod 12 is provided with a ring-shaped wire rod unsteady portion 16 at the tip end thereof, and a ring-shaped wire rod central portion 17 at the center thereof.
A ring-shaped wire rod non-steady portion 18 is formed at the rear end portion.
In addition, the end portion of the ring-shaped wire rod 12 in the width direction orthogonal to the transport direction A of the hot-rolled wire rod is at the end portion of the ring-shaped wire rod 1.
9, a ring-shaped wire path central portion 20 is formed in the central portion. In the transport direction A of the hot-rolled wire rod, the regions of the ring-shaped wire rod unsteady portions 16 and 18 have a sparse overlapping state of the ring-shaped wire rod 12, whereas the region of the ring-shaped wire rod central portion 17 is dense. . Further, in the widthwise direction orthogonal to the transport direction A of the hot-rolled wire rod, in the region of the ring-shaped wire rod end portion 19, the overlapping state of the ring-shaped wire rods 12 is dense.
The area of the ring-shaped wire rod central portion 20 is sparse.
【００２２】このようにリング状線材１２においては、
必然的に重畳密度の疎密が生じることから、徐冷時にお
いて均一な徐冷条件とすることができない。特に、リン
グ状線材１２の線材直径による影響は大きく、例えば、
線材直径が約１２ｍｍ以上では、リング状線材１２の熱
容量も大きくなることからリング状線材非定常部１６、
１８の領域を除いて必要な徐冷速度での均一な軟化が可
能であるが、線材直径が約１２ｍｍ未満では、リング状
線材１２の熱容量が小さくなり、リング状線材中央部１
７においても、リング状線材パス端部１９の領域に対
し、リング状線材パス中央部２０の領域での徐冷速度が
必要以上に速くなることから、徐冷速度の制御手段が必
要になる。As described above, in the ring-shaped wire 12,
Since the overlapping density is inevitably sparse and dense, it is not possible to make uniform slow cooling conditions during slow cooling. In particular, the influence of the wire diameter of the ring-shaped wire 12 is large, and for example,
When the wire diameter is about 12 mm or more, the heat capacity of the ring-shaped wire 12 also increases, so the ring-shaped wire unsteady portion 16,
Uniform softening is possible at the required slow cooling rate except for the region of 18, but if the wire diameter is less than about 12 mm, the heat capacity of the ring-shaped wire 12 becomes small, and the ring-shaped wire central portion 1
Also in No. 7, since the slow cooling rate in the area of the ring-shaped wire path central portion 20 becomes faster than necessary with respect to the area of the ring-shaped wire path end portion 19, a control means for the slow-cooling speed is required.
【００２３】図４は、図２の徐冷装置における第２コン
ベア１０の要部断面図である。図２と同一の部分は同一
の符号を付して、詳細な説明は省略する。徐冷カバー１
３は、断熱体により構成され、ローラテーブル８の上部
空間を覆うように配置されている。側部カバー１５は、
徐冷カバー１３と同様に断熱体により構成され、ローラ
テーブル８の軸方向両端の側面を保護するように配置さ
れている。徐冷カバー１３及び側部カバー１５は、外部
空間からリング状線材１２に与える熱的影響を遮断し、
徐冷カバー１３の内部空間における内部雰囲気温度の制
御性と安定性を向上させ、リング状線材１２の過冷却を
防止している。徐冷カバー１３及び側部カバー１５に用
いる断熱手段としては、例えば、粉末・粒子状断熱体、
繊維状断熱体、綿状断熱体、層状断熱体、構造断熱体、
複合断熱体等が可能である。徐冷カバー１３の内面上部
には、徐冷速度の制御手段としての加熱ヒータ１４を更
に設けている。FIG. 4 is a sectional view of the main part of the second conveyor 10 in the slow cooling device of FIG. The same parts as those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted. Slow cooling cover 1
3 is composed of a heat insulator, and is arranged so as to cover the upper space of the roller table 8. The side cover 15 is
Like the slow cooling cover 13, it is made of a heat insulating material and is arranged so as to protect the side surfaces of the roller table 8 at both axial ends. The slow cooling cover 13 and the side cover 15 block the thermal influence on the ring-shaped wire 12 from the external space,
The controllability and stability of the internal atmosphere temperature in the internal space of the slow cooling cover 13 are improved, and the ring-shaped wire 12 is prevented from being overcooled. As the heat insulating means used for the slow cooling cover 13 and the side cover 15, for example, a powder / particulate heat insulator,
Fibrous insulation, cotton insulation, layered insulation, structural insulation,
Composite heat insulators etc. are possible. Above the inner surface of the slow cooling cover 13, a heater 14 is further provided as a slow cooling rate control means.
【００２４】加熱ヒータ１４は、電気抵抗加熱式のヒー
タを用いた。加熱ヒータ１４は、熱間圧延線材の搬送方
向に直交する幅方向において、つまり徐冷カバー１３の
幅方向において、リング状線材１２のリング径に対し、
約８０％乃至１３５％の範囲内にリング状線材１２に対
応して配置した。このように徐冷カバー１３に更に加熱
ヒータ１４を設けることにより、徐冷カバー１３により
覆われた内部空間における内部雰囲気温度を第１コンベ
ア９による冷却温度（第１温度）より低い第２温度に確
実に設定保持することができ、より確実な徐冷が可能と
なる。尚、第２温度は約４００℃に設定したが、これに
限るものでは無く、徐冷対象であるリング状線材１２の
線材直径、リング径等に応じて必要な徐冷速度を実現で
きる温度に、又、第１温度との平衡等を考慮して適宜設
定すれば良い。As the heater 14, an electric resistance heating type heater was used. In the width direction orthogonal to the transport direction of the hot-rolled wire rod, that is, in the width direction of the slow cooling cover 13, the heater 14 is provided with respect to the ring diameter of the ring-shaped wire rod 12.
It was arranged corresponding to the ring-shaped wire 12 within a range of about 80% to 135%. By further providing the heater 14 on the slow cooling cover 13 as described above, the internal atmosphere temperature in the internal space covered by the slow cooling cover 13 is set to the second temperature lower than the cooling temperature (first temperature) by the first conveyor 9. The setting and holding can be surely performed, and more reliable slow cooling can be performed. Although the second temperature is set to about 400 ° C., the temperature is not limited to this, and may be set to a temperature at which a necessary slow cooling rate can be realized according to the wire diameter, ring diameter, etc. of the ring-shaped wire 12 to be slowly cooled. Further, it may be appropriately set in consideration of equilibrium with the first temperature.
【００２５】尚、加熱ヒータ１４の加熱力と第２コンベ
ア１０の搬送速度との間での熱平衡状態を制御して、第
２コンベア１０における徐冷速度を約１０乃至５０℃／
ｍｉｎの範囲内にすれば、リング状線材１２に対してよ
り良い徐冷条件となることを確認した。The thermal equilibrium state between the heating power of the heater 14 and the conveying speed of the second conveyor 10 is controlled so that the slow cooling speed of the second conveyor 10 is approximately 10 to 50 ° C. /
It was confirmed that if it was within the range of min, the ring-shaped wire rod 12 would have better annealing conditions.
【００２６】加熱ヒータ１４とリング状線材１２との間
隔は搬送可能な範囲で極力狭く設定することが、空間容
積の省スペース、加熱ヒータ１４の熱効率等の観点から
望ましい。It is desirable that the space between the heater 14 and the ring-shaped wire 12 is set as narrow as possible within the transportable range from the viewpoints of space space saving, heat efficiency of the heater 14, and the like.
【００２７】[0027]
【発明の効果】以上詳述したように、第１発明において
は、第１コンベアによりリング状線材の全長に亘って均
一に所定温度まで冷却できることから、均一に冷却した
リング状線材を搬送経路の下流側に配置した第２コンベ
アに移送でき、更に、第２コンベアにおいてはリング状
線材を重畳密度の比較的高い密状態にして載置移送で
き、リング状線材の熱容量を大きくした状態のもとで加
熱ヒータにより加熱しつつ徐冷することができるので、
リング状線材の全長に亘って均一で所望範囲内の徐冷速
度に制御することが可能な熱間圧延線材の徐冷装置を実
現できる。As described above in detail, in the first aspect of the present invention, the first conveyor can uniformly cool the entire length of the ring-shaped wire to the predetermined temperature. It can be transferred to the second conveyor arranged on the downstream side, and further, in the second conveyor, the ring-shaped wire can be placed and transferred in a dense state with a relatively high superposition density, and the heat capacity of the ring-shaped wire can be increased. Since it can be gradually cooled while being heated by the heater,
It is possible to realize a gradual cooling device for a hot-rolled wire that can be controlled uniformly over the entire length of the ring-shaped wire at a slow cooling rate within a desired range.
【００２８】第２発明においては、加熱ヒータの配置範
囲をリング状線材のリング径の８０％乃至１３５％に対
応する範囲に配置したので、搬送方向に直交する幅方向
における温度分布の均一化ができ、より均一な徐冷とよ
り正確な徐冷速度の制御が可能な熱間圧延線材の徐冷装
置を実現できる。In the second aspect of the invention, the heaters are arranged in the range corresponding to 80% to 135% of the ring diameter of the ring-shaped wire, so that the temperature distribution in the width direction orthogonal to the conveying direction is made uniform. As a result, it is possible to realize a gradual cooling device for hot-rolled wire rods that enables more uniform gradual cooling and more accurate gradual cooling rate control.
【００２９】第３発明においては、リング状線材を第１
コンベアにより第１重畳状態で所定温度まで冷却し、第
２コンベアにおいては第１重畳状態より高密度の第２重
畳状態で更に低い温度で徐冷することにより、徐冷カバ
ーにより覆われた範囲における内部雰囲気温度を第１コ
ンベアによる冷却温度（第１温度）より低い第２温度に
確実に設定保持することができ、より確実な徐冷が可能
な熱間圧延線材の徐冷装置を実現できる。In the third invention, the ring-shaped wire is the first.
In the range covered by the gradual cooling cover, the conveyor is cooled to a predetermined temperature in the first superposed state, and the second conveyor is gradually cooled at a lower temperature in the second superposed state having a higher density than the first superposed state. The internal atmosphere temperature can be reliably set and maintained at the second temperature lower than the cooling temperature (first temperature) by the first conveyor, and the gradual cooling device for the hot-rolled wire rod capable of more gradual gradual cooling can be realized.
【００３０】第４発明においては、徐冷速度を所定の範
囲内に制御することとしたので、熱間圧延線材の均一な
軟質化をより確実に実現することが可能な熱間圧延線材
の徐冷装置を実現できる。In the fourth aspect of the invention, since the slow cooling rate is controlled within a predetermined range, it is possible to more reliably realize uniform softening of the hot rolled wire rod. A refrigerator can be realized.
【図１】熱間圧延線材の製造設備の全体概略図である。FIG. 1 is an overall schematic view of a hot-rolled wire manufacturing facility.
【図２】本発明に係る熱間圧延線材の徐冷装置を示す概
略側面図である。FIG. 2 is a schematic side view showing an annealing device for a hot-rolled wire according to the present invention.
【図３】リング状線材の搬送時の重畳状態を示す平面図
である。FIG. 3 is a plan view showing a superposed state when the ring-shaped wire is conveyed.
【図４】図２の徐冷装置における第２コンベアの要部断
面図である。4 is a cross-sectional view of a main part of a second conveyor in the slow cooling device of FIG.
１ 加熱炉 ２ 粗列圧延機 ３ 中間列圧延機 ４ 仕上圧延機 ５ 捲取装置 ６ ステルモアコンベア ７ リフォームステーション ８ ローラテーブル ９ 第１コンベア １０ 第２コンベア １１ コンベア間段差 １２ リング状線材 １３ 徐冷カバー １４ 加熱ヒータ １５ 側部カバー １６ リング状線材非定常部 １７ リング状線材中央部 １８ リング状線材非定常部 １９ リング状線材パス端部 ２０ リング状線材パス中央部 Ａ 熱間圧延線材の搬送方向 Ｌ 直線状の熱間圧延線材 1 heating furnace 2 Rough row rolling mill 3 Middle row rolling mill 4 Finishing mill 5 Winding device 6 Stelmore conveyor 7 reform station 8 roller table 9 First conveyor 10 Second conveyor 11 Steps between conveyors 12 Ring-shaped wire 13 Slow cooling cover 14 heater 15 Side cover 16 Ring-shaped wire unsteady part 17 Central part of ring-shaped wire 18 Ring-shaped wire unsteady part 19 Ring-shaped wire path end 20 Ring-shaped wire path center A Hot-rolled wire conveying direction L Linear hot-rolled wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 河添 健一 福岡県北九州市小倉北区許斐町１番地 株 式会社住友金属小倉内 (72)発明者 根石 豊 福岡県北九州市小倉北区許斐町１番地 株 式会社住友金属小倉内 (72)発明者 川崎 康浩 福岡県北九州市小倉北区許斐町１番地 株 式会社住友金属小倉内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kenichi Kawazoe Fukuoka Prefecture Kitakyushu City Kokurakita-ku, Konomi-cho 1-share Ceremony Company Sumitomo Metal Kokurauchi (72) Inventor Yutaka Negishi Fukuoka Prefecture Kitakyushu City Kokurakita-ku, Konomi-cho 1-share Ceremony Company Sumitomo Metal Kokurauchi (72) Inventor Yasuhiro Kawasaki Fukuoka Prefecture Kitakyushu City Kokurakita-ku, Konomi-cho 1-share Ceremony Company Sumitomo Metal Kokurauchi
Claims (4)
速度により搬送する第１コンベアと、該第１コンベアの
下流側に配置され前記リング状線材を第１搬送速度より
遅い第２搬送速度により搬送する第２コンベアと、該第
２コンベアの上部空間を覆う徐冷カバーと、該徐冷カバ
ーの内面上部に設けられた加熱ヒータとを備えたことを
特徴とする熱間圧延線材の徐冷装置。1. A first conveyor that conveys a hot-rolled ring-shaped wire at a first conveying speed, and a second conveyor that is arranged downstream of the first conveyor and that conveys the ring-shaped wire at a speed lower than the first conveying speed. A hot-rolled wire rod, comprising: a second conveyor that conveys at a speed; a gradual cooling cover that covers an upper space of the second conveyor; and a heater that is provided above the inner surface of the gradual cooling cover. Annealing device.
幅方向において、リング状線材のリング径の８０％乃至
１３５％に対応する範囲に配置されたことを特徴とする
請求項１に記載の熱間圧延線材の徐冷装置。2. The heating heater is arranged in a range corresponding to 80% to 135% of the ring diameter of the ring-shaped wire in the width direction orthogonal to the conveying direction. Annealer for hot rolled wire.
を第１重畳状態により搬送して第１温度まで冷却し、前
記第２コンベアは、前記リング状線材を第１重畳状態よ
り重畳密度の高い第２重畳状態により搬送して第１温度
より低い第２温度の雰囲気中で徐冷する構成としたこと
を特徴とする請求項１又は２に記載の熱間圧延線材の徐
冷装置。3. The first conveyor conveys the ring-shaped wire rod in a first superposed state and cools it to a first temperature, and the second conveyor conveys the ring-shaped wire rod in a superposed density higher than that in the first superposed state. The gradual cooling device for a hot-rolled wire according to claim 1 or 2, wherein the gradual cooling device for hot-rolled wire rod is configured to be conveyed in a high second superposition state and gradually cooled in an atmosphere of a second temperature lower than the first temperature.
１０乃至５０℃／ｍｉｎであることを特徴とする請求項
３に記載の熱間圧延線材の徐冷装置。4. The slow cooling rate in the second conveyor is
The slow cooling device for a hot-rolled wire according to claim 3, wherein the temperature is 10 to 50 ° C / min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333440A JP2003136122A (en) | 2001-10-30 | 2001-10-30 | Slow cooling apparatus of hot rolled wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333440A JP2003136122A (en) | 2001-10-30 | 2001-10-30 | Slow cooling apparatus of hot rolled wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003136122A true JP2003136122A (en) | 2003-05-14 |
Family
ID=19148696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001333440A Pending JP2003136122A (en) | 2001-10-30 | 2001-10-30 | Slow cooling apparatus of hot rolled wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003136122A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101138181B1 (en) | 2004-12-24 | 2012-04-25 | 재단법인 포항산업과학연구원 | Method for reducing the difference of cooling rates between center portion and outer portion of hot-rolled wire rod |
| KR101253827B1 (en) * | 2010-09-10 | 2013-04-12 | 주식회사 포스코 | Method and Apparatus for Cooling Wire-rod Coil |
| CN103182396A (en) * | 2011-12-30 | 2013-07-03 | 中冶赛迪工程技术股份有限公司 | Cooling bed thermal-insulation cover |
| CN115283471A (en) * | 2022-10-08 | 2022-11-04 | 中北大学 | Forward extrusion uniform forming method for complex section |
-
2001
- 2001-10-30 JP JP2001333440A patent/JP2003136122A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101138181B1 (en) | 2004-12-24 | 2012-04-25 | 재단법인 포항산업과학연구원 | Method for reducing the difference of cooling rates between center portion and outer portion of hot-rolled wire rod |
| KR101253827B1 (en) * | 2010-09-10 | 2013-04-12 | 주식회사 포스코 | Method and Apparatus for Cooling Wire-rod Coil |
| CN103182396A (en) * | 2011-12-30 | 2013-07-03 | 中冶赛迪工程技术股份有限公司 | Cooling bed thermal-insulation cover |
| CN115283471A (en) * | 2022-10-08 | 2022-11-04 | 中北大学 | Forward extrusion uniform forming method for complex section |
| CN115283471B (en) * | 2022-10-08 | 2022-12-20 | 中北大学 | Forward extrusion uniform forming method for complex section |
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