JP2005095940A - Rolling-reduction apparatus for cast slab in continuous casting facility, and continuous casting facility - Google Patents

Rolling-reduction apparatus for cast slab in continuous casting facility, and continuous casting facility Download PDF

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JP2005095940A
JP2005095940A JP2003333602A JP2003333602A JP2005095940A JP 2005095940 A JP2005095940 A JP 2005095940A JP 2003333602 A JP2003333602 A JP 2003333602A JP 2003333602 A JP2003333602 A JP 2003333602A JP 2005095940 A JP2005095940 A JP 2005095940A
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slab
continuous casting
link member
roll
reduction
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JP2005095940A5 (en
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Hiroshi Kawaguchi
浩志 川口
Fumiki Asano
文樹 浅野
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Kobe Steel Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling-reduction apparatus for a cast slab in a continuous casting facility, wherein the interference with a guide for inducing a dummy bar and the dummy bar root at the storing time and at the inserting time, can be avoided and also, this apparatus can easily be set in a suitable rolling-reduction zone. <P>SOLUTION: The rolling-reduction apparatus A for cast slab in the continuous casting facility, in which an upper frame 1 for supporting the upper roll 2 so as to be freely rotated, is rotatably arranged to a lower frame 3 for supporting the lower roll 4 so as to be freely rotated through a rotating shaft 16 parallel to a roll shaft, is provided with a hydraulic cylinder 5 pivotally supported to the side surface at the rotating shaft 16 side of the upper frame 1, a first link member 6 pivotally supporting the one end part with the other end part of the hydraulic cylinder 5 and pivotally supporting the other end part with the side surface at the reverse rotating shaft side of the lower frame 3, a second link member 7 pivotally supporting the one end part in the intermediate portion of the first link member 6 and pivotally supporting the other end part with the side surface at the reverse rotating shaft side of the upper frame 1 and an ascending/descending device 8 for regulating the position of the pivotal supporting parts 21 of the first link member 6 and the hydraulic cylinder 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、連続鋳造設備に関し、特には連続鋳造される鋳片の凝固末期域を圧下する鋳片圧下装置に関するものである。   The present invention relates to a continuous casting facility, and more particularly to a slab reduction device that reduces the final solidification region of continuously cast slabs.

従来、鋼の連続鋳造においては、鋳片の中心偏析の改善が図れることから、鋳型及びその下の二次冷却帯より連続して引き抜かれてくる鋳片に対し、その凝固末期域で圧下を加えて鋳造することが行われている。   Conventionally, in the continuous casting of steel, since the center segregation of the slab can be improved, the slab continuously drawn from the mold and the secondary cooling zone below it is reduced in the final stage of solidification. In addition, casting is performed.

この凝固末期の鋳片圧下は、鋳片の中心偏析の主原因である凝固収縮による残溶鋼の流動を防止して偏析改善を図る技術であり、凝固収縮量に見合った収縮補償を実現する圧下条件とすることが重要である、とされている[鉄と鋼,Vol.80(1994)No.1,第45頁(非特許文献1)参照]。そして、その具体的な連続鋳造方法としては、例えば特開平4−309446号公報(特許文献1)などに提案されたものがある。   This slab reduction at the end of solidification is a technique to improve the segregation by preventing the flow of residual molten steel due to solidification shrinkage, which is the main cause of the center segregation of the slab, and achieves shrinkage compensation that matches the amount of solidification shrinkage. It is said that it is important to set the conditions [Iron and steel, Vol. 80 (1994) No. 1, page 45 (Non-Patent Document 1)]. And as the concrete continuous casting method, there exists a thing proposed by Unexamined-Japanese-Patent No. 4-309446 (patent document 1) etc., for example.

上記文献等によれば、凝固末期の鋳片圧下は、鋳片寸法、鋳造速度、鋼種、二次冷却条件等の操業条件により、圧下すべき最適な位置と最適な圧下量が存在しており、中心偏析改善のため、鋳片に対して適正位置で適正量の圧下を加えることが肝要であることが分かる。一方、鋳片凝固の最終段階(クレータエンド)の鋳片厚み中心部には固液共存層が存在し、この固液共存層はやがて100%固相へと変化し完全凝固する。圧下が早過ぎる(圧下位置が上流過ぎる)と、固液共存層の樹間に存在する濃化溶鋼が圧下により流動し、かえって鋳片の品質劣化を招く。また逆に圧下が遅過ぎる(圧下位置が下流過ぎる)と、中心偏析が形成された後の鋳片圧下となり、意味を成さない。すなわち、過度の圧下量や適正位置でない圧下は、かえって鋳片品質を損なうとされている。   According to the above documents, the slab reduction at the end of solidification has the optimal position and the optimal reduction amount to be reduced depending on the operating conditions such as slab size, casting speed, steel type, and secondary cooling conditions. In order to improve the center segregation, it is important to apply an appropriate amount of reduction at an appropriate position on the slab. On the other hand, a solid-liquid coexistence layer exists at the center of the slab thickness at the final stage of slab solidification (crater end), and this solid-liquid coexistence layer eventually changes to 100% solid phase and completely solidifies. If the reduction is too early (the reduction position is too upstream), the concentrated molten steel existing between the trees of the solid-liquid coexistence layer flows due to the reduction, and on the contrary, deteriorates the quality of the slab. On the other hand, if the reduction is too slow (the reduction position is too downstream), the slab is reduced after the center segregation is formed, which is meaningless. That is, it is said that excessive reduction amount or reduction not at an appropriate position will adversely affect the slab quality.

上記凝固末期の鋳片圧下には、通常、図3に示すような構造の鋳片圧下装置が使用される。すなわち、この鋳片圧下装置Bは、パスラインPの下方の下ロール41とパスラインPの上方の上ロール42で構成される。通常、下ロール41はロール天端43をパスラインPと一致させるため固設とし、上ロール42を油圧シリンダ44などで下方に加圧して鋳片Cを圧下する。上ロール42の軸箱45はU字状のサイドフレーム46に嵌合し、上下方向に自在に摺動する。上ロール42の左右の軸箱45、45は、圧下フレーム47に取付けられており、その圧下フレーム47の中央部を油圧シリンダ44で下方に押下げて加圧する。なお、油圧シリンダ44は、サイドフレーム46の上部に設けた架台フレーム48に設けられている。また、符号49は上下ロール41、42の間隔を調整するための駆動モータである。この駆動モータ49は、伝動機構50を介在せしめて上ロール42の軸箱45を設けた圧下フレーム47に連結されている。   For slab reduction at the end of solidification, a slab reduction device having a structure as shown in FIG. 3 is usually used. In other words, the slab reducing device B includes a lower roll 41 below the pass line P and an upper roll 42 above the pass line P. Usually, the lower roll 41 is fixed in order to align the roll top end 43 with the pass line P, and the upper roll 42 is pressed downward by a hydraulic cylinder 44 or the like to reduce the slab C. The shaft box 45 of the upper roll 42 is fitted to a U-shaped side frame 46 and slides freely in the vertical direction. The left and right axle boxes 45, 45 of the upper roll 42 are attached to a reduction frame 47, and the central portion of the reduction frame 47 is pressed downward by the hydraulic cylinder 44 to apply pressure. The hydraulic cylinder 44 is provided on a gantry frame 48 provided on the upper side of the side frame 46. Reference numeral 49 denotes a drive motor for adjusting the interval between the upper and lower rolls 41 and 42. The drive motor 49 is connected to a reduction frame 47 provided with a shaft box 45 of the upper roll 42 with a transmission mechanism 50 interposed therebetween.

ところで、中心偏析の改善にとって重要な鋳片の凝固末期域は、上述のように鋳片寸法、鋳造速度、鋼種、二次冷却などの条件により異なる。また、その凝固末期域の引き抜き方向の前後には、通常、鋳造初期に鋳片を引き抜いてくるダミーバーを格納装置へ誘導するためのダミーバー誘導ガイド、鋳片やダミーバーを引き抜くためのピンチロール、鋳片を所定長さに切断するための切断装置が設置されている。上記鋳片圧下装置Bは、これらの装置類やダミーバーと干渉しないように設置される。   By the way, the final stage of solidification of the slab, which is important for improving the center segregation, varies depending on conditions such as the slab size, casting speed, steel type, and secondary cooling as described above. In addition, before and after the drawing direction in the final solidification zone, usually a dummy bar guide for guiding the dummy bar that pulls out the slab at the beginning of casting to the storage device, a pinch roll for pulling out the slab and dummy bar, casting A cutting device for cutting the piece into a predetermined length is installed. The slab reduction device B is installed so as not to interfere with these devices and dummy bars.

ところが、上記のようにダミーバーの格納装置には、格納装置にダミーバーを誘導するためのダミーバー誘導ガイドを設ける場合が多い(特にリンク式ダミーバーの場合)。このダミーバー誘導ガイドが上述の鋳片の適正圧下域に存在すると、鋳片圧下装置Bがダミーバー誘導ガイドに干渉するため、この領域には鋳片圧下装置Bを設置することができない。特に、鋳片パスラインとその鋳片パスラインに臨むダミーバー誘導ガイドとの角度が浅い場合には、ダミーバー誘導ガイドと鋳片圧下装置Bとの干渉する領域が広くなるため、鋳片圧下装置Bを配置できないエリアが広範になる。   However, as described above, the dummy bar storage device is often provided with a dummy bar guide for guiding the dummy bar to the storage device (particularly in the case of a link type dummy bar). If this dummy bar guide is present in the above-described appropriate slab reduction area, the slab reduction device B interferes with the dummy bar guide, so that the slab reduction device B cannot be installed in this area. In particular, when the angle between the slab pass line and the dummy bar guiding guide facing the slab pass line is shallow, an area where the dummy bar guiding guide and the slab pressing device B interfere with each other is widened. The area that cannot be placed becomes wide.

一方、特開平7−328751号公報(特許文献2)に記載のようにソリッドダミーバーの場合には、ダミーバーの案内ローラが設けられるものの、大掛かりなダミーバー誘導ガイドが無い場合が多い。このような場合でも、格納時あるいは挿入時のダミーバーの軌道と鋳片圧下装置Bが干渉するため、この領域に鋳片圧下装置Bを設置することが難しい。また、この場合でも、設備の湾曲軌跡通りに湾曲した剛体ダミーバーとなるため、ダミーバーの円弧半径が大きくならざるを得ず、格納時のダミーバー軌道が鋳片軌道に大きく侵食するため、やはり上記同様に鋳片圧下装置Bを配置できないエリアが広範になる。比較的小さな断面鋳片の連続鋳造設備では、この形式のダミーバー格納方式が多く採用されているため、鋳片圧下装置Bの導入が難しい。これに対応させる鋳片圧下装置としては、特許文献2に提案されているような上ロールを上方に大きく退避させる構造とする必要があり、装置が大掛かりになり、設備コストが高くなる。   On the other hand, in the case of a solid dummy bar as described in JP-A-7-328751 (Patent Document 2), although a dummy bar guide roller is provided, there is often no large dummy bar guide. Even in such a case, since the track of the dummy bar at the time of storage or insertion interferes with the slab reducing device B, it is difficult to install the slab reducing device B in this region. Also in this case, since the rigid dummy bar is curved according to the curved trajectory of the equipment, the arc radius of the dummy bar must be increased, and the dummy bar track during storage greatly erodes the slab track. In addition, the area where the slab reduction device B cannot be arranged becomes wide. In continuous casting equipment for relatively small cross-section slabs, this type of dummy bar storage system is often used, so it is difficult to introduce the slab reduction device B. As a slab reduction device corresponding to this, it is necessary to have a structure in which the upper roll as proposed in Patent Document 2 is largely retracted upward, and the device becomes large and equipment costs increase.

しかし近年、鋳片品質が益々厳格化する中、小断面鋳片においても中心偏析の改善が強く求められる状況になっており、ビレット連鋳設備のような小規模の連続鋳造設備においても中心偏析の改善を目的とし、鋳片圧下装置Bの導入ニーズが多い。また、生産性を向上するため鋳造速度が高速化しつつあるが、鋳造速度を高めるほど、凝固末期の鋳片厚み中心部近傍の固液共存層の範囲が鋳片引き抜き方向に拡がるため、最適圧下領域も鋳片引き抜き方向に拡がる。すなわち、鋳片圧下装置を広範に多数設けなければならなくなる。しかし、上述の「ダミーバー格納装置と鋳片圧下装置との干渉」あるいは「ダミーバー格納時のダミーバーの軌道と鋳片圧下装置との干渉」のため、鋳片圧下装置Bを設置できにくい領域があり、鋳片圧下装置Bの導入を断念せざるを得ない場合が起こる。また、鋳片圧下装置Bを導入しても、物理的に干渉するこの領域には鋳片圧下装置を適正に設置することが難しく、中心偏析の改善効果が期待できない。   However, in recent years, as the quality of slabs has become more and more strict, improvement of center segregation has been strongly demanded even for small-section slabs, and center segregation also occurs in small-scale continuous casting equipment such as billet continuous casting equipment. There is much need for introduction of the slab reduction device B for the purpose of improving the above. In addition, the casting speed is increasing to improve productivity, but as the casting speed is increased, the range of the solid-liquid coexistence layer near the center of the slab thickness at the end of solidification is expanded in the direction of slab drawing, so optimal reduction The area also expands in the direction of drawing the slab. That is, a large number of slab reduction devices must be provided. However, there is an area where it is difficult to install the slab reduction device B due to the above-mentioned "interference between the dummy bar storage device and the slab reduction device" or "interference between the dummy bar track and the slab reduction device when storing the dummy bar". In some cases, it is necessary to give up the introduction of the slab reduction device B. Further, even if the slab reduction device B is introduced, it is difficult to properly install the slab reduction device in this physically interfering region, and the improvement effect of the center segregation cannot be expected.

また、上記したようにパスライン上には鋳片切断装置が設置されている。鋳片の切断は、切断面から溶鋼が流出することを防止するため鋳片が完全凝固してから実施される。通常、メニスカスから切断位置までの距離を過剰に確保する(切断位置を下流にする)ことは、不経済である上に、鋳片の温度低下を招く。特に、直送圧延を実施している場合には、鋳片の温度低下は問題になる。従って、鋳片切断位置は、鋳片完全凝固位置のやや下流とすることが一般的である。一方、鋳片の適正圧下域は、鋳片が完全凝固する位置から上流側にある。   As described above, the slab cutting device is installed on the pass line. The slab is cut after the slab is completely solidified to prevent the molten steel from flowing out of the cut surface. Usually, securing an excessive distance from the meniscus to the cutting position (making the cutting position downstream) is uneconomical and causes a decrease in the temperature of the slab. In particular, when direct feed rolling is performed, the temperature drop of the slab becomes a problem. Therefore, the slab cutting position is generally slightly downstream of the slab full solidification position. On the other hand, the appropriate reduction area of the slab is upstream from the position where the slab is completely solidified.

上述したように、鋼の含有炭素量が高くなると固相と液相とが共存する領域の鋳造方向の長さが長くなる。鋼種によって鋳造速度を変えるケースも多い。上流工程や下流工程とのマッチングのために、鋳造速度を低下させることもある。このように鋼種や鋳造速度により適正圧下域は変動する。すなわち、多くの鋼種を対象に高速から低速までの鋳造速度をカバーしようとすれば、適正に圧下すべき領域が広くなり、鋳片切断装置までのパスライン上で鋳片圧下装置の設置領域と設置台数が多くなる。また、ダミーバー格納方式には種々の形式があり、剛体ダミーバーの場合には、連鋳機の基準円弧の延長軌跡上にダミーバーを誘導して格納する。他の方式では、切断位置のやや上流側に設置するのが一般的であり合理的である。ところが、従来の鋳片圧下装置は、上方部に圧下のための油圧モータなどがあり、その設置すべき位置と、ダミーバー格納装置あるいはダミーバー格納挿入時の軌道とが干渉してしまう。
特開平4−309446号公報 特開平7−328751号公報 鉄と鋼,Vol.80(1994)No.1,第45頁
As described above, when the carbon content of steel increases, the length in the casting direction of the region where the solid phase and the liquid phase coexist is increased. There are many cases where the casting speed is changed depending on the steel type. The casting speed may be reduced for matching with the upstream process and the downstream process. Thus, the appropriate reduction range varies depending on the steel type and casting speed. That is, if it is intended to cover the casting speed from high speed to low speed for many steel types, the area to be properly reduced becomes wider, and the installation area of the slab reduction device on the pass line to the slab cutting device The number of installations increases. There are various types of dummy bar storage systems. In the case of a rigid dummy bar, the dummy bar is guided and stored on the extended locus of the reference arc of the continuous casting machine. In other systems, it is common and reasonable to install a little upstream of the cutting position. However, the conventional slab reduction device has a hydraulic motor for reduction at the upper part, and the position to be installed interferes with the dummy bar storage device or the track when the dummy bar storage is inserted.
JP-A-4-309446 JP-A-7-328751 Iron and steel, Vol. 80 (1994) No. 1, page 45

本発明は、上記の背景技術における問題点を解消するためになしたものであって、その目的は、ダミーバー誘導ガイドや格納時、挿入時のダミーバー軌道との干渉を回避し得るとともに、適正圧下域に設置容易な、連続鋳造設備における鋳片圧下装置を提供するものであり、またそのような鋳片圧下装置を備える連続鋳造設備を提供するものである。   The present invention has been made to solve the problems in the background art described above, and its purpose is to avoid interference with the dummy bar track at the time of dummy bar guiding guide, storage and insertion, and appropriate reduction. The present invention provides a slab reduction device in a continuous casting facility that is easy to install in a zone, and also provides a continuous casting facility including such a slab reduction device.

本発明(請求項1)に係る連続鋳造設備における鋳片圧下装置は、上ロールを回転自在に支持する上フレームを、下ロールを回転自在に支持する下フレームに、ロール軸に平行な回動軸を介して回動可能に設けてなる連続鋳造設備における鋳片圧下装置において、上フレームの回動軸側の側面に枢支された伸縮可能な駆動装置と、この駆動装置に一端を枢支され且つ他端を下フレームの反回動軸側の側面に枢支された第1リンク部材と、この第1リンク部材の中間部分に一端を枢支され且つ他端を上フレームの反回動軸側の側面に枢支された第2リンク部材と、第1リンク部材と駆動装置の枢支部を位置規制する昇降装置とを備えてなるものである。そして、この連続鋳造設備における鋳片圧下装置において、 前記第2リンク部材は、伸縮自在な部材からなるものが好ましい(請求項2)。また、伸縮可能な駆動装置としては、液圧(油圧)シリンダ、電動パワージャッキ、ステッピングシリンダなどが使用できる。   The slab reducing device in the continuous casting equipment according to the present invention (Claim 1) is configured such that the upper frame that rotatably supports the upper roll is rotated in parallel with the roll axis to the lower frame that rotatably supports the lower roll. In a slab reduction device in a continuous casting facility that is rotatably provided via a shaft, an extendable drive device that is pivotally supported on the side surface of the upper frame on the rotary shaft side, and one end pivotally supported on this drive device A first link member whose other end is pivotally supported on the side surface of the lower frame on the counter-rotating shaft side, one end pivotally supported by an intermediate portion of the first link member, and the other end counter-rotating the upper frame. It comprises a second link member pivotally supported on the side surface on the shaft side, and a lifting device for regulating the position of the first link member and the pivotal support portion of the drive device. And in the slab reduction apparatus in this continuous casting equipment, it is preferable that the second link member is made of an elastic member (Claim 2). Further, as the extendable drive device, a hydraulic (hydraulic) cylinder, an electric power jack, a stepping cylinder, or the like can be used.

本発明者等は、上記の構成を見出すまでの課程で、上フレームと下フレームを枢支するとともに、反枢支側の上フレームの側面と下フレームの側面の間に液圧シリンダを設けて、下フレームに対して上フレームを回動させて昇降させることを検討したが、この方式では、大きな能力の液圧シリンダが必要となること、またロール間隔の調整が行い難いことを知見した。これに対して、上記構成では、伸縮可能な駆動装置(例えば液圧シリンダ)、第1リンク部材及び第2リンク部材を用いて倍力リンク機構を構成したので、液圧シリンダの能力を小さくでき、上述した従来の鋳片圧下装置はもとより前記大きな能力の液圧シリンダを備える鋳片圧下装置よりもコンパクトな構造にでき、ダミーバー誘導ガイドや格納時、挿入時のダミーバー軌道との干渉が回避できる。その上、上フレームの上方には加圧機構などが無いので狭い設置スペースに対応でき、適正な圧下域への設置が可能になる。   In the course of finding the above-described configuration, the present inventors pivotally support the upper frame and the lower frame, and provide a hydraulic cylinder between the side of the upper frame and the side of the lower frame on the anti-pivot side. However, the present inventors have investigated that the upper frame is rotated up and down with respect to the lower frame. However, it has been found that this method requires a hydraulic cylinder having a large capacity and that it is difficult to adjust the roll interval. On the other hand, in the above configuration, since the booster link mechanism is configured using the extendable drive device (for example, hydraulic cylinder), the first link member, and the second link member, the capacity of the hydraulic cylinder can be reduced. In addition to the above-described conventional slab reduction device, it can be made more compact than the slab reduction device including the hydraulic cylinder having the above-mentioned large capacity, and can avoid interference with the dummy bar guide guides and the dummy bar track during insertion and insertion. . In addition, since there is no pressurizing mechanism above the upper frame, it is possible to deal with a narrow installation space, and it is possible to install in an appropriate reduction area.

本発明(請求項3)に係る連続鋳造設備は、対向配置された一対の上ロールと下ロールにより鋳片を圧下する鋳片圧下装置を備える連続鋳造設備であって、前記上ロールをダミーバーが通過する軌跡より下方に退避可能に設置したものである。   The continuous casting equipment according to the present invention (Claim 3) is a continuous casting equipment provided with a slab reduction device that squeezes the slab with a pair of upper and lower rolls arranged opposite to each other, wherein the upper roll is provided with a dummy bar. It is installed so that it can be retracted below the trajectory to pass.

本発明(請求項4)に係る連続鋳造設備は、対向配置された一対の上ロールと下ロールにより鋳片の凝固末期域を圧下する鋳片圧下装置を備える連続鋳造設備において、請求項1又は2に記載の鋳片圧下装置の少なくとも1つが、鋳片の切断装置より上流側に所望間隔で設置されてなるものである。   The continuous casting equipment according to the present invention (Claim 4) is a continuous casting equipment comprising a slab reduction device that squeezes a solidification end region of a slab with a pair of upper and lower rolls arranged opposite to each other. At least one of the slab reduction devices described in 2 is installed at a desired interval upstream of the slab cutting device.

本発明によれば、連続鋳造設備における鋳片圧下装置をコンパクトな構造にでき、ダミーバー誘導ガイドや格納時、挿入時のダミーバー軌道との干渉が回避できるとともに、適正な圧下域への設置が可能である。また、このように適正圧下域への設置が可能なことから、鋳造された鋳片の偏析改善効果が期待できる。   According to the present invention, the slab reduction device in a continuous casting facility can be made compact in structure, can avoid interference with dummy bar guide guides, storage and dummy bar tracks during insertion, and can be installed in an appropriate reduction area. It is. In addition, since it can be installed in the appropriate reduction region, an effect of improving segregation of the cast slab can be expected.

以下、本発明の実施形態を図面に基づいて説明する。図1は、本発明に係る連続鋳造設備における鋳片圧下装置の説明図であって、aは正面図、bは左側面図、cは右側面図である。図において、1は上フレーム、2は上ロール、3は下フレーム、4は下ロール、5は液圧(油圧)シリンダ、6は第1リンク部材、7は第2リンク部材、8は昇降装置である。なお、以下の説明において、前後は鋳片の引き抜き方向を前、その逆方向を後とし、左右は鋳片の引き抜き方向の側方を指す。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of a slab reduction device in a continuous casting facility according to the present invention, in which a is a front view, b is a left side view, and c is a right side view. In the figure, 1 is an upper frame, 2 is an upper roll, 3 is a lower frame, 4 is a lower roll, 5 is a hydraulic (hydraulic) cylinder, 6 is a first link member, 7 is a second link member, and 8 is a lifting device. It is. In the following description, front and rear refer to the drawing direction of the slab as the front, and the opposite direction refers to the rear, and the left and right refer to the sides of the slab.

上フレーム1は、左右の上サイドフレーム9とこの上サイドフレーム9の前後に設けられた連結フレーム10とで構成されるとともに、上サイドフレーム9に設けた上ロール用軸受11を介して上ロール2を回転自在に支持している。   The upper frame 1 is composed of left and right upper side frames 9 and connecting frames 10 provided before and after the upper side frame 9, and the upper rolls via upper roll bearings 11 provided on the upper side frame 9. 2 is rotatably supported.

下フレーム3は、左右のL字状の下サイドベースフレーム12と、この下サイドベースフレーム12を連結するベースフレーム13と、下サイドベースフレーム12のL字状の内側に設けた下サイドフレーム14とで構成されるとともに、下サイドフレーム14に設けた下ロール用軸受15を介して下ロール4を回転自在に支持している。また、下サイドベースフレーム12の頂部に上サイドフレーム9の前端部を固定ピン16によって回動可能に支持することで上フレーム1を下フレーム3に対して回動可能に設けている。   The lower frame 3 includes left and right L-shaped lower side base frames 12, a base frame 13 connecting the lower side base frames 12, and a lower side frame 14 provided inside the L-shaped inside of the lower side base frame 12. The lower roll 4 is rotatably supported via a lower roll bearing 15 provided on the lower side frame 14. Further, the upper frame 1 is rotatably provided with respect to the lower frame 3 by supporting the front end portion of the upper side frame 9 by a fixing pin 16 at the top of the lower side base frame 12.

油圧シリンダ5は、そのロッド17を、上フレーム1の前側の連結フレーム10に設けられたピン18によって回動可能に支持されている。なお、このピン18は、連結フレーム10(上フレーム1)の他に、下フレーム3のサイドベースフレーム12のL字頂部を上方に延長して設けるようにしてもよい。   In the hydraulic cylinder 5, the rod 17 is rotatably supported by a pin 18 provided on the connecting frame 10 on the front side of the upper frame 1. In addition to the connection frame 10 (upper frame 1), the pin 18 may be provided by extending the L-shaped top of the side base frame 12 of the lower frame 3 upward.

第1リンク部材6は、その一端を、下フレーム3の下サイドべースフレーム12の後側に設けられたピン19によって回動可能に支持され、他端を、上記油圧シリンダ5のヘッド20にピン21によって回動可能に支持されている。   One end of the first link member 6 is rotatably supported by a pin 19 provided on the rear side of the lower side base frame 12 of the lower frame 3, and the other end is pinned to the head 20 of the hydraulic cylinder 5. 21 is rotatably supported.

第2リンク部材7は、その一端を、上フレーム1の後側の連結フレーム10に設けられたピン22によって回動可能に支持され、他端を、上記第1リンク部材6の中間部分にピン23によって回動可能に支持されている。なお、本例では、この第2リンク部材7の中央部には、イニシャルのロール間隔を調整するためのターンバックル24を設けているが、省略してもよい。   One end of the second link member 7 is rotatably supported by a pin 22 provided on the connecting frame 10 on the rear side of the upper frame 1, and the other end is pinned to an intermediate portion of the first link member 6. 23 is rotatably supported. In this example, a turnbuckle 24 for adjusting the initial roll interval is provided at the center of the second link member 7, but may be omitted.

昇降装置8は、左右の下サイドベースフレーム12の前側に貫通させて連結軸25を回動可能に設け、この連結軸25の両端に偏芯輪26を、その上面が第1リンク部材6と油圧シリンダ5との連結部(ピン21の部分)の下面と当接するように設ける一方、連結軸25を、歯車機構27を介して減速機付き電動モータ28に連結して構成されている。この昇降装置8は、上ロール2と下ロール4との隙間を調整し、鋳片Cに対する圧下量を調整するものである。また、第1リンク部材6の反時計回りの回転角度を偏芯輪26で規制している。なお、本例では、偏芯輪26を、連結軸25を介して下フレーム3の両側に設けた構成としたが、連結せずに別々に設けてもよい。また、駆動装置として減速機付き電動モータ28を例としたが、油圧モータであってもよい。また、本例では、昇降装置8を、その偏芯輪26の上面が第1リンク部材6と油圧シリンダ5との連結部(ピン21の部分)の下面と当接するように設ける場合を例示したが、第1リンク部材6の途中の下面と当接するように設けてもよい。   The elevating device 8 penetrates the front side of the left and right lower side base frames 12 so as to pivotally connect the connecting shaft 25, eccentric rings 26 are provided at both ends of the connecting shaft 25, and the upper surface thereof is connected to the first link member 6. The connecting shaft 25 is configured to be connected to an electric motor 28 with a speed reducer via a gear mechanism 27 while being provided so as to contact the lower surface of a connecting portion (pin 21 portion) with the hydraulic cylinder 5. This elevating device 8 adjusts the gap between the upper roll 2 and the lower roll 4 and adjusts the amount of reduction with respect to the slab C. Further, the counterclockwise rotation angle of the first link member 6 is restricted by the eccentric ring 26. In this example, the eccentric ring 26 is provided on both sides of the lower frame 3 via the connecting shaft 25, but may be provided separately without being connected. Moreover, although the electric motor 28 with a reduction gear was taken as an example of the drive device, a hydraulic motor may be used. Moreover, in this example, the case where the raising / lowering device 8 is provided so that the upper surface of the eccentric ring 26 is in contact with the lower surface of the connecting portion (pin 21 portion) between the first link member 6 and the hydraulic cylinder 5 is illustrated. However, you may provide so that the lower surface in the middle of the 1st link member 6 may contact | abut.

上記構成の連続鋳造設備における鋳片圧下装置Aでは、油圧シリンダ5、第1リンク部材6、第2リンク部材7からなるリンク機構を備えているので、油圧シリンダ5のヘッド側を加圧すると、第1リンク部材6がピン19を支点として反時計回りに回転し、ピン23の部分が下方に移動し第2リンク部材7を介してピン22が下方に移動する。この移動により、上フレーム1は、固定ピン16を支点として時計回りに回転し、上ロール2が下方に移動し、鋳片Cを圧下する。また、上ロール2を開放するには、油圧シリンダ5のロッド側を加圧する。この上ロール2の開放は、低温となっている鋳片Cの先端部あるいは後端部が上下ロール2、4間を通過する時に、ロールとの干渉を回避するための機能である。   In the slab reduction device A in the continuous casting equipment having the above-described configuration, since the link mechanism including the hydraulic cylinder 5, the first link member 6, and the second link member 7 is provided, when the head side of the hydraulic cylinder 5 is pressurized, The first link member 6 rotates counterclockwise with the pin 19 as a fulcrum, the pin 23 moves downward, and the pin 22 moves downward via the second link member 7. By this movement, the upper frame 1 rotates clockwise with the fixing pin 16 as a fulcrum, the upper roll 2 moves downward, and the slab C is pressed down. Further, to release the upper roll 2, the rod side of the hydraulic cylinder 5 is pressurized. The opening of the upper roll 2 is a function for avoiding interference with the roll when the front end portion or the rear end portion of the slab C having a low temperature passes between the upper and lower rolls 2 and 4.

また、上記構成の連続鋳造設備における鋳片圧下装置Aでは、昇降装置8を備えているので、上記の鋳片圧下時、油圧シリンダ5のヘッド側を加圧するが、第1リンク部材6の反時計回りの回転角度が偏芯輪26で規制されており、上ロール2の下方への移動量が規制される。すなわち、鋳片圧下時の上ロール2と下ロール4との間隔(ロール間隔)が規定されることになる。従って、偏芯輪26を回転させれば(偏芯輪26の位相を変えれば)、偏芯輪26と当接している第1リンク部材6の連結部(ピン21の部分)の接触位置が、上下方向に変化するので、鋳片圧下時のロール間隔を変更することができる。   Moreover, since the slab reducing device A in the continuous casting equipment having the above configuration includes the lifting device 8, the head side of the hydraulic cylinder 5 is pressurized at the time of the slab reduction, but the first link member 6 is counteracted. The clockwise rotation angle is regulated by the eccentric ring 26, and the downward movement amount of the upper roll 2 is regulated. That is, the space | interval (roll space | interval) of the upper roll 2 and the lower roll 4 at the time of slab pressure reduction is prescribed | regulated. Therefore, if the eccentric ring 26 is rotated (the phase of the eccentric ring 26 is changed), the contact position of the connecting portion (portion 21 portion) of the first link member 6 that is in contact with the eccentric ring 26 is changed. Since it changes in the vertical direction, the roll interval at the time of slab reduction can be changed.

因みに、上記例において、リンク機構を、上フレーム1を2:1のレバー比、第1リンク部材6を3:1のレバー比で構成した場合、油圧シリンダ5の推力は2×3=6倍に増力されるので、極めて小さな油圧シリンダ5を採用することができる。仮に、上記例で、φ50mm径の油圧シリンダ2本で構成した場合、油圧圧力16.7MPaで約40トンの鋳片圧下力を発生することができる。これは、φ173mm径の油圧シリンダ1本の推力に相当する。   Incidentally, in the above example, when the link mechanism is configured with the upper frame 1 having a lever ratio of 2: 1 and the first link member 6 having a lever ratio of 3: 1, the thrust of the hydraulic cylinder 5 is 2 × 3 = 6 times. Therefore, an extremely small hydraulic cylinder 5 can be employed. In the above example, when the hydraulic cylinder is composed of two φ50 mm diameter hydraulic cylinders, a slab reduction force of about 40 tons can be generated at a hydraulic pressure of 16.7 MPa. This corresponds to the thrust of one hydraulic cylinder having a diameter of 173 mm.

油圧シリンダ5が、上記のような増力機構により小径の油圧シリンダで構成できるため、鋳片圧下装置Aの左右側部に配置しても、鋳片圧下装置Aの幅寸法が大きくならず、鋳片圧下装置自体の構成をコンパクトにでき、小さなストランド間隔の連鋳設備にも適用できる。また、鋳片圧下時のロール間隔は、圧下時のロール間隔が適切でないと、鋳片品質に悪影響を与えることから高精度な管理が求められるが、上記構成の鋳片圧下装置Aでは、偏芯輪26の位相を変化させることにより、鋳片圧下時のロール間隔を変更できるので、例えば上フレーム1を2:1のレバー比、第1リンク部材6を3:1のレバー比で構成した場合、偏芯輪26と当接している第1リンク部材6の連結部(ピン21の部分)の接触位置の上下方向変位は、ロール間隔変動量の1/6に相当するため微調整が可能で、高精度なロール間隔管理が可能となる。   Since the hydraulic cylinder 5 can be constituted by a small-diameter hydraulic cylinder by the boosting mechanism as described above, even if it is arranged on the left and right sides of the slab reducing device A, the width dimension of the slab reducing device A does not increase, and the casting The configuration of the single reduction device itself can be made compact, and can be applied to continuous casting equipment with a small strand spacing. In addition, the roll interval at the time of slab reduction has a bad influence on the quality of the slab if the roll interval at the time of reduction is not appropriate, but high precision management is required. By changing the phase of the core ring 26, the roll interval at the time of slab reduction can be changed. For example, the upper frame 1 is configured with a lever ratio of 2: 1 and the first link member 6 is configured with a lever ratio of 3: 1. In this case, the vertical displacement of the contact position of the connecting portion (pin 21 portion) of the first link member 6 that is in contact with the eccentric ring 26 corresponds to 1/6 of the roll interval fluctuation amount, so that fine adjustment is possible. Thus, highly accurate roll interval management becomes possible.

なお、上記の実施形態においては、鋼種、鋳造速度等の操業条件に対応するため、昇降装置8を設け、鋳片圧下時のロール間隔を調整可能とする場合を例に説明したが、本発明はこの例に限定されるものではなく、操業条件に変化がなくロール間隔が一定でよい場合には、昇降装置8を設けず、偏芯輪26の位置に、偏芯輪26に換えて固定座を設ければよい。   In the above embodiment, in order to cope with the operation conditions such as the steel type and the casting speed, the lifting device 8 is provided, and the case where the roll interval at the time of slab reduction can be adjusted has been described as an example. Is not limited to this example, and when the operating condition does not change and the roll interval may be constant, the lifting device 8 is not provided and the eccentric ring 26 is fixed instead of the eccentric ring 26. A seat may be provided.

また、上記の実施形態のように、昇降装置8を設け、鋳片圧下時のロール間隔を調整可能とする場合には、その調整は遠隔操作で行うことが好ましいが、遠隔操作が必要でない場合には手動操作で偏芯輪26の位相を変更してもよい。   Further, as in the above embodiment, when the lifting device 8 is provided and the roll interval at the time of slab reduction can be adjusted, the adjustment is preferably performed by remote operation, but the remote operation is not necessary. Alternatively, the phase of the eccentric ring 26 may be changed manually.

また、上記の実施形態においては、偏芯輪26を備える昇降装置8を例に説明したが、本発明はこの例に限定されるものではなく、例えば、偏芯輪26を備える昇降装置8に換えてウォームジャッキを設けて昇降動作させてもよいし、あるいはくさび方式としくさびを出し入れすることで昇降動作させるようにしてもよい。   Moreover, in said embodiment, although demonstrated to the example the raising / lowering apparatus 8 provided with the eccentric ring | wheel 26, this invention is not limited to this example, For example, the raising / lowering apparatus 8 provided with the eccentric ring | wheel 26 is used. Alternatively, a worm jack may be provided to move up and down, or a wedge system and a wedge may be taken in and out to move up and down.

また、上記の実施形態においては、油圧シリンダ5を例に説明したが、本発明はこの例に限定されるものではなく、例えば、電動パワージャッキやステッピングシリンダに置き換えてもよい。   In the above embodiment, the hydraulic cylinder 5 has been described as an example. However, the present invention is not limited to this example, and may be replaced with, for example, an electric power jack or a stepping cylinder.

図2は、上記構成の鋳片圧下装置Aを備える連続鋳造設備の一例を示す側面図である。図示の連続鋳造設備は、円弧形の連続鋳造設備であって剛体ダミーバーが使用されている。鋳片Cのパスライン上方にダミーバー格納装置30が設けられ、切断機31の上流側で、剛体ダミーバー32をダミーバー格納装置30に格納する方式のものである。なお、図において、符号Mは鋳型を示し、この鋳型Mより引き抜かれた鋳片Cは、後記する鋳片圧下装置33〜37を経て切断機31により切断されて所定長さの鋳片となる。   FIG. 2 is a side view showing an example of continuous casting equipment provided with the slab reducing device A having the above-described configuration. The illustrated continuous casting equipment is an arc-shaped continuous casting equipment and uses a rigid dummy bar. A dummy bar storage device 30 is provided above the pass line of the slab C, and a rigid dummy bar 32 is stored in the dummy bar storage device 30 on the upstream side of the cutting machine 31. In the figure, symbol M indicates a mold, and a slab C drawn out from the mold M is cut by a cutting machine 31 through slab depressing devices 33 to 37 described later to become a slab of a predetermined length. .

第1の鋳片圧下装置33は、図3に示す従来形の鋳片圧下装置が採用されており、この第1の鋳片圧下装置33は、鋳片引抜を兼用するため駆動ロールとしている(駆動装置は図示せず)。また、第2の鋳片圧下装置34及び第3の鋳片圧下装置35は、ともに図3に示す従来形の鋳片圧下装置が採用され、本例では上ロール、下ロール共にフリーロールとしている。   As the first slab reducing device 33, a conventional slab reducing device shown in FIG. 3 is employed, and this first slab reducing device 33 is used as a drive roll in order to double the slab drawing ( (Driver not shown). Further, both the second slab pressing device 34 and the third slab pressing device 35 adopt the conventional slab pressing device shown in FIG. 3, and in this example, both the upper roll and the lower roll are free rolls. .

第4の鋳片圧下装置36及び第5の鋳片圧下装置37は、ともに上述した本発明に係る鋳片圧下装置Aが採用されている。この鋳片圧下装置36、37は、上ロール2の上方には、図3に示す従来形の鋳片圧下装置Bのように上ロール42を昇降させるための油圧シリンダ44など一切の干渉物が無いので、ダミーバー32の軌道と干渉しない。   Both the fourth slab reduction device 36 and the fifth slab reduction device 37 employ the above-described slab reduction device A according to the present invention. In the slab reducing devices 36 and 37, above the upper roll 2, any interference such as a hydraulic cylinder 44 for raising and lowering the upper roll 42 as in the conventional slab reducing device B shown in FIG. There is no interference with the orbit of the dummy bar 32.

また、鋳片圧下装置Aは、鋳片パスラインとダミーバー軌道とで形成する三角形の空間38に、上ロール2までが入る空間さえあれば、鋳片圧下装置Aを配置することができる。また、ダミーバーの軌道中にダミーバー受けローラを設ける場合もあるが、上ローラ2を、第4の鋳片圧下装置36の上ローラ2のようにダミーバー受けローラとすることも可能である。   Further, the slab reducing device A can be disposed as long as there is a space in which the upper roll 2 can be accommodated in the triangular space 38 formed by the slab pass line and the dummy bar track. In some cases, a dummy bar receiving roller may be provided in the track of the dummy bar, but the upper roller 2 may be a dummy bar receiving roller like the upper roller 2 of the fourth slab reducing device 36.

なお、第4の鋳片圧下装置36及び第5の鋳片圧下装置37の設置位置に従来形の鋳片圧下装置Bを設置しようとすると、ダミーバーの軌道と鋳片圧下装置Bとが干渉するため、鋳片圧下装置Bを配置することができないことは言うまでもない。また、従来形の鋳片圧下装置Bの上ロール42の上下方向の可動ストロークを大きくして、ダミーバー軌道との干渉を回避することも考えられるが、第4の鋳片圧下装置36及び第5の鋳片圧下装置37の設置位置を考えると、上ロール42の上下方向の必要ストロークが非常に大きなものとなり現実的ではない。   Note that when the conventional slab pressing device B is installed at the installation position of the fourth slab pressing device 36 and the fifth slab pressing device 37, the track of the dummy bar and the slab pressing device B interfere with each other. Therefore, it goes without saying that the slab reduction device B cannot be arranged. It is also conceivable to increase the vertical movable stroke of the upper roll 42 of the conventional slab reducing device B to avoid interference with the dummy bar track, but the fourth slab reducing device 36 and the fifth When the installation position of the slab reduction device 37 is considered, the required stroke in the vertical direction of the upper roll 42 becomes very large, which is not realistic.

なお、上記の例では、第4の鋳片圧下装置36及び第5の鋳片圧下装置37の設置を、固定ピン16を下流側に、ピン22を上流側に向けて設置したが、固定ピン16を上流側に、ピン22を下流側に向けて設置してもよいことは言うまでもない。   In the above example, the fourth slab reduction device 36 and the fifth slab reduction device 37 are installed with the fixing pin 16 facing the downstream side and the pin 22 facing the upstream side. Needless to say, 16 may be installed on the upstream side and the pin 22 may be installed on the downstream side.

本発明に係る連続鋳造設備における鋳片圧下装置の説明図であって、aは正面図、bは左側面図、cは右側面図である。It is explanatory drawing of the slab reduction apparatus in the continuous casting equipment which concerns on this invention, Comprising: a is a front view, b is a left view, c is a right view. 本発明に係る鋳片圧下装置を備える連続鋳造設備の一例を示す側面図である。It is a side view which shows an example of the continuous casting installation provided with the slab reduction apparatus which concerns on this invention. 従来の連続鋳造設備における鋳片圧下装置の説明図であって、aは正面図、bは左側面図である。It is explanatory drawing of the slab reduction apparatus in the conventional continuous casting installation, Comprising: a is a front view, b is a left view.

符号の説明Explanation of symbols

1:上フレーム 2:上ロール 3:下フレーム
4:下ロール 5:油圧シリンダ 6:第1リンク部材
7:第2リンク部材 8:昇降装置 9:上サイドフレーム
10:連結フレーム 11:上ロール用軸受
12:下サイドベースフレーム 13:ベースフレーム
14:下サイドフレーム 15:下ロール用軸受 16:固定ピン
17:ロッド 18、19:ピン 20:ヘッド
21、22,23:ピン 24:ターンバックル 25:連結軸
26:偏芯輪 27:歯車機構 28:電動モータ
30:ダミーバー格納装置 31:切断機
32:ダミーバー 33:第1の鋳片圧下装置
34:第2の鋳片圧下装置 35:第3の鋳片圧下装置
36:第4の鋳片圧下装置 37:第5の鋳片圧下装置
38:空間 A、B:鋳片圧下装置 C:鋳片
M:鋳型

1: Upper frame 2: Upper roll 3: Lower frame 4: Lower roll 5: Hydraulic cylinder 6: First link member 7: Second link member 8: Lifting device 9: Upper side frame 10: Connection frame 11: For upper roll Bearing 12: Lower side base frame 13: Base frame 14: Lower side frame 15: Bearing for lower roll 16: Fixed pin 17: Rod 18, 19: Pin 20: Head 21, 22, 23: Pin 24: Turnbuckle 25: Connecting shaft 26: Eccentric ring 27: Gear mechanism 28: Electric motor 30: Dummy bar storage device 31: Cutting machine 32: Dummy bar 33: First slab reduction device 34: Second slab reduction device 35: Third Slab reduction device 36: Fourth slab reduction device 37: Fifth slab reduction device 38: Space A, B: Slab reduction device C: Slab M: Mold

Claims (4)

上ロールを回転自在に支持する上フレームを、下ロールを回転自在に支持する下フレームに、ロール軸に平行な回動軸を介して回動可能に設けてなる連続鋳造設備における鋳片圧下装置において、上フレームの回動軸側の側面に枢支された伸縮可能な駆動装置と、この駆動装置に一端を枢支され且つ他端を下フレームの反回動軸側の側面に枢支された第1リンク部材と、この第1リンク部材の中間部分に一端を枢支され且つ他端を上フレームの反回動軸側の側面に枢支された第2リンク部材と、第1リンク部材と駆動装置の枢支部を上下動可能に位置規制する昇降装置とを備えてなることを特徴とする連続鋳造設備における鋳片圧下装置。   A slab reduction device in a continuous casting facility in which an upper frame that rotatably supports an upper roll is provided on a lower frame that rotatably supports a lower roll via a rotation axis parallel to the roll axis. The telescopic drive device pivotally supported on the side surface of the upper frame on the rotating shaft side, one end pivotally supported by the drive device, and the other end pivoted on the side surface of the lower frame on the counter-rotating shaft side. A first link member, a second link member having one end pivotally supported by an intermediate portion of the first link member and the other end pivotally supported by a side surface of the upper frame on the counter-rotating shaft side, and a first link member And a slab reducing device in a continuous casting facility, characterized in that it includes a lifting device that restricts the position of a pivotal support portion of the drive device so as to be movable up and down. 第2リンク部材が、伸縮自在な部材からなる請求項1に記載の連続鋳造設備における鋳片圧下装置。   The slab reducing device in the continuous casting equipment according to claim 1, wherein the second link member is made of an elastic member. 対向配置された一対の上ロールと下ロールにより鋳片を圧下する鋳片圧下装置を備える連続鋳造設備であって、前記上ロールをダミーバーが通過する軌跡より下方に退避可能に設置したことを特徴とする連続鋳造設備。   A continuous casting facility comprising a slab reduction device that squeezes a slab with a pair of opposed upper and lower rolls, wherein the upper roll is installed so as to be retractable below a trajectory through which a dummy bar passes. Continuous casting equipment. 対向配置された一対の上ロールと下ロールにより鋳片の凝固末期域を圧下する鋳片圧下装置を備える連続鋳造設備において、請求項1又は2に記載の鋳片圧下装置の少なくとも1つが、鋳片の切断装置より上流側に所望間隔で設置されてなることを特徴とする連続鋳造設備。

In the continuous casting equipment provided with the slab reduction device that reduces the final solidification region of the slab by a pair of upper rolls and lower rolls arranged to face each other, at least one of the slab reduction devices according to claim 1 or 2 is a casting A continuous casting facility characterized by being installed at a desired interval upstream of the piece cutting device.

JP2003333602A 2003-09-25 2003-09-25 Slab reduction device and continuous casting equipment in continuous casting equipment Expired - Fee Related JP4256755B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104439140A (en) * 2014-12-01 2015-03-25 浙江科宇金属材料有限公司 Bar draw gear
CN109014103A (en) * 2018-09-05 2018-12-18 中冶连铸技术工程有限责任公司 The automatic centering lateral guide of square billet guide section
CN114905017A (en) * 2022-06-16 2022-08-16 中国重型机械研究院股份公司 Continuous casting high-reduction device and method for adaptively controlling casting and rolling speed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104439140A (en) * 2014-12-01 2015-03-25 浙江科宇金属材料有限公司 Bar draw gear
CN109014103A (en) * 2018-09-05 2018-12-18 中冶连铸技术工程有限责任公司 The automatic centering lateral guide of square billet guide section
CN114905017A (en) * 2022-06-16 2022-08-16 中国重型机械研究院股份公司 Continuous casting high-reduction device and method for adaptively controlling casting and rolling speed
CN114905017B (en) * 2022-06-16 2024-02-02 中国重型机械研究院股份公司 Continuous casting large-reduction device and method capable of adaptively controlling casting and rolling speed

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