JPH05269551A - Strip continuous caster - Google Patents
Strip continuous casterInfo
- Publication number
- JPH05269551A JPH05269551A JP9709392A JP9709392A JPH05269551A JP H05269551 A JPH05269551 A JP H05269551A JP 9709392 A JP9709392 A JP 9709392A JP 9709392 A JP9709392 A JP 9709392A JP H05269551 A JPH05269551 A JP H05269551A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- side dam
- circumferential surface
- thin plate
- continuous casting
- 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.)
- Granted
Links
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，溶湯から直接的に薄板
を連続鋳造するための双ロール式連鋳機の改善，特に同
一出願人に係る特開昭63-252646号公報に提案した“研
削式ダム”による双ロール式連鋳機の一層の改善に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a twin roll type continuous casting machine for continuously casting thin plates directly from a molten metal, and in particular, it has been proposed in Japanese Patent Laid-Open No. 63-252646 by the same applicant. Further improvement of twin roll continuous casting machine by "grinding dam".
【０００２】[0002]
【従来の技術】互いに反対方向に回転する一対の内部冷
却ロールを適当な間隙をあけて平行に対向配置し，該ロ
ール対の円周面上に湯溜りを形成させ，この湯溜り中の
湯を回転するロール円周面で冷却しながら，該間隙を経
て薄板に連続鋳造する双ロール式連鋳機が知られてい
る。このような双ロール式連鋳機を鋼の連鋳に適用し
て，溶鋼から薄鋼板を直接製造しようとする研究開発が
盛んに行われている。2. Description of the Related Art A pair of internal cooling rolls rotating in opposite directions are arranged in parallel with each other with an appropriate gap, and a pool of water is formed on the circumferential surface of the pair of rolls. A twin roll type continuous casting machine is known which continuously casts a thin plate through the gap while cooling it on the circumferential surface of a rotating roll. Research and development have been actively conducted to directly produce thin steel sheets from molten steel by applying such twin roll type continuous casting machine to continuous casting of steel.
【０００３】双ロール式連鋳機において，ロール対の間
隙から薄板連鋳品を常時連続的に送り出すためにはロー
ル対の間隙上部に溶鋼の湯溜りを形成し，この湯溜りに
溶鋼を連続的に注入することが必要となるが，この湯溜
りをロール対の円周面上に形成するには，鋳造される薄
板の幅方向の流れを規制するダムが必要となる。このダ
ムは通常は鋳片の幅を規制する役割も果たす。すなわ
ち，両方の円周面上に形成された凝固シエルが，ロール
対の間隙で圧着され且つ最狭隙部で圧延されるさいにそ
の両縁部は幅方向に延び出そうとするが，これを抑制す
る。この薄板鋳片の両縁を規制すべく対をなした二つの
固定壁からなるダムをサイドダムと呼ぶ。In a twin roll type continuous casting machine, in order to constantly continuously feed a thin plate continuous cast product from a gap between roll pairs, a molten steel pool is formed above the gap between the roll pairs, and the molten steel is continuously fed into this pool. However, in order to form this pool on the circumferential surface of the roll pair, a dam is required to control the flow of the thin sheet to be cast in the width direction. This dam also usually serves to control the width of the slab. That is, when the solidified shells formed on both circumferential surfaces are pressed at the gap between the roll pairs and rolled at the narrowest gap, both edges tend to extend in the width direction. Suppress. A dam composed of two fixed walls that are paired to control both edges of this thin plate slab is called a side dam.
【０００４】本発明者らは，特開昭63-252646号公報に
おいて“研削式ダム”（または移動式と固定式との中間
の半移動研削方式）とも言うべき薄板連鋳機の発明を提
案した。これはサイドダムを被削性の良好な耐火物で構
成し，このサイドダムを鋳造中に鋳造方向に積極的に送
り出すことによってサイドダムとロール表面および鋳造
される板端部との摩擦部においてサイドダムを研削消耗
させつつ鋳造運転を行うものである。The inventors of the present invention have proposed an invention of a thin plate continuous casting machine which can be referred to as a "grinding dam" (or a half-moving grinding method between a moving type and a fixed type) in Japanese Patent Laid-Open No. 63-252646. did. This consists of a side dam made of a refractory material with good machinability. By positively feeding this side dam in the casting direction during casting, the side dam is ground at the friction part between the side dam and the roll surface and the edge of the plate to be cast. The casting operation is performed while exhausting.
【０００５】[0005]
【発明が解決しようとする課題】本発明者らは，この研
削ダム方式による鋳造実験をその後も繰り返してきた。
その結果，この方式において，液密性を維持しながらよ
り安定した鋳造を行なうには，サイドダム下端部での研
削消耗の形態を力学的な観点並びに形状的な観点からな
お改善することが必要であることが判明した。本発明は
これを課題とするものである。DISCLOSURE OF THE INVENTION The present inventors have repeated the casting experiment by the grinding dam method thereafter.
As a result, in this method, in order to perform more stable casting while maintaining liquid tightness, it is necessary to improve the form of grinding wear at the lower end of the side dam from a mechanical and geometrical point of view. It turned out to be. The present invention addresses this problem.
【０００６】[0006]
【課題を解決するための手段】本発明は，互いに反対方
向に回転する一対の内部冷却ロールを平行に対向配置
し，該ロール対の円周面上に湯溜りを形成させるための
一対のサイドダムを，その厚みの一部または全部がロー
ル円周面上に位置するようにその底部の少なくとも一部
をロールの円周面に接触させて配設すると共にロールと
接触するサイドダム部分を易削性耐火物材料で構成し，
このサイドダムを鋳造の方向に向けて所定の速度で送り
出す機構を設け，この送り出し機構による押し圧によっ
てロール円周面と接するサイドダム部分を回転するロー
ル表面で研削消耗させつつ鋳造する薄板連鋳装置におい
て，サイドダムと接触するロール円周面の部分をロール
端に向かうほどロールギャップが広がるように縮径さ
せ，そして，前記の送り出し機構によるサイドダムの送
り出し方向を，ロール軸に直交する面に対して，サイド
ダム下端がロールの中央側に近づく方向に，所定の角度
だけ傾斜させたことを特徴とする。SUMMARY OF THE INVENTION According to the present invention, a pair of side dams for arranging a pair of internal cooling rolls rotating in opposite directions in parallel to each other and forming a pool on the circumferential surface of the roll pair. Is placed by contacting at least part of its bottom with the circumferential surface of the roll so that part or all of its thickness is located on the circumferential surface of the roll, and the side dam portion that comes into contact with the roll is easy to cut. Composed of refractory material,
In a thin plate continuous casting device that is equipped with a mechanism that feeds out this side dam at a predetermined speed in the casting direction, and presses by this feed mechanism while grinding and exhausting the side dam portion in contact with the roll circumferential surface on the rotating roll surface. , The diameter of the roll circumferential surface that contacts the side dam is reduced so that the roll gap becomes wider toward the roll end, and the feeding direction of the side dam by the feeding mechanism is set to the plane orthogonal to the roll axis. The feature is that the lower end of the side dam is inclined by a predetermined angle in the direction toward the center of the roll.
【０００７】[0007]
【作用】特開昭63-252646号公報に提案した“研削式ダ
ム”の鋳造運転実績によれば，ロール円周面で研削され
るサイドダムは，ロールの最狭隙部に対応する部分では
ロール軸方向にもロール軸と直交する方向にも厚みが薄
くなり，この部分のサイドダムの強度が構造的に低下す
ることが避けられず，液密性を確保し且つ薄板両端部の
形状を良好に維持する上では，なお改善が必要であるこ
とがわかった。According to the casting operation results of the "grinding dam" proposed in Japanese Patent Laid-Open No. 63-252646, the side dam ground on the circumferential surface of the roll has a roll at the portion corresponding to the narrowest gap of the roll. The thickness is thin in both the axial direction and the direction orthogonal to the roll axis, and the strength of the side dam in this part is unavoidably structurally reduced, ensuring liquid tightness and improving the shape of both ends of the thin plate. It was found that improvement is still needed to maintain it.
【０００８】特にロール円周面で研削されるサイドダム
の最下縁部は，鋳造される薄板の幅広がりによって内側
に削り取られるので，その下縁端はロール軸とほぼ平行
な面が現れることになり，鋳造条件が変動したような際
には液漏れの危険がある。In particular, the lowermost edge of the side dam, which is ground on the circumferential surface of the roll, is shaved inward by the widening of the cast thin plate, so that the lower edge of the side dam appears to be substantially parallel to the roll axis. Therefore, there is a risk of liquid leakage when the casting conditions change.
【０００９】本発明によれば，サイドダムと接触するロ
ール円周面の部分をロール端に向かうほどロールギャッ
プが広がるように縮径させたから，この縮径部分で挟ま
れるサイドダム部分の厚みがロール端に向かうほど厚く
なり，この厚みの増加によってサイドダムの強度が補償
される。According to the present invention, the diameter of the portion of the circumferential surface of the roll that contacts the side dam is reduced so that the roll gap becomes wider toward the roll end. Therefore, the thickness of the side dam portion sandwiched between the reduced diameter portions is the end of the roll. The strength of the side dam is compensated by increasing this thickness.
【００１０】加えて，サイドダムの送り出し方向を，ロ
ール軸に直交する面に対してサイドダム下端がロールの
中央側に近づく方向に傾斜させたから，ロールの最狭隙
部に近づくほど，サイドダムはロール中央部分に向かっ
て張り出すようになり，鋳造される薄板の縁部で削り取
られる部分の形状が安定すると共に，サイドダムを送り
出す応力がロール中央部分に向かう方向のベクトルを有
することになり，このために薄板側から加わる反対方向
のベクトルと対向するので，応力的にも安定する。In addition, since the side dam is inclined so that the lower end of the side dam approaches the center of the roll with respect to the plane orthogonal to the roll axis, the side dam is closer to the center of the roll as it approaches the narrowest gap of the roll. The shape of the part to be cut off at the edge of the cast thin plate becomes stable, and the stress sending out the side dam has a vector in the direction toward the center of the roll. Since it opposes the vector in the opposite direction applied from the thin plate side, it is also stable in terms of stress.
【００１１】[0011]
【実施例】図１は，本発明装置の一実施例を示すもので
あり，定常的な稼動状態にある鋳造中の様子を図解的に
示したものである。図示のように，互いに反対方向に回
転する一対の内部冷却ロール1a,1b を平行に対向配置
し，このロール対1a,1b の円周面Ｒ上に湯溜り２を形成
させるための一対のサイドダム3a,3b が，その厚みの一
部または全部がロール円周面Ｒ上に位置するようにその
底部の少なくとも一部をロールの円周面Ｒに接触させて
配設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the apparatus of the present invention, and schematically shows the state during casting in a steady operating state. As shown in the figure, a pair of side cooling dams 1a, 1b that rotate in opposite directions are arranged in parallel and face each other, and a pair of side dams for forming a pool 2 on the circumferential surface R of the roll pair 1a, 1b. At least a part of the bottoms of the rolls 3a and 3b are arranged in contact with the circumferential surface R of the roll so that a part or all of the thickness thereof is located on the circumferential surface R of the roll.
【００１２】ロール1a,1b は, 図示の例では, ロール軸
を介して内部に通水路をもつ水冷ロールである。サイド
ダム3a,3b は，少なくともロールと接触することになる
部分は易削性耐火物材料で構成されている。かような耐
火物としては，セラッミクファイバーボードやボロンナ
イトライド（ＢＮ）がある。そして, このサイドダム3
a,3b を鋳造の方向に向けて所定の速度で送り出す機構
を設け，この送り出し機構による押し圧によってロール
円周面と接するサイドダム部分を回転するロール表面で
研削消耗させつつ鋳造運転を行う。４は鋳造される薄板
を示している。In the illustrated example, the rolls 1a and 1b are water-cooled rolls having a water passage inside through a roll shaft. The side dams 3a and 3b are made of an easily machinable refractory material at least in the portions that come into contact with the rolls. Such refractory materials include ceramic fiberboard and boron nitride (BN). And this side dam 3
A mechanism that feeds a and 3b in the casting direction at a predetermined speed is provided, and the casting operation is performed while the side dam portion in contact with the roll circumferential surface is abraded by the rotating roll surface by the pressing force of this feed mechanism. Reference numeral 4 indicates a thin plate to be cast.
【００１３】本発明装置は，かような研削式サイドダム
による薄板連鋳機において，先ずサイドダムと接触する
ロール円周面の部分6a,6b, 7a,7bをロール端に向かうほ
どロールギャップ (ロール間隙) が広がるように縮径さ
せる。すなわち, 円周面が先細りとなるようにテーパを
付ける。図示の例では, サイドダム3a,3b はこのテーパ
部分6a,6b, 7a,7bにその厚みの一部が接触するように配
置されている。そして各サイドダム3a,3b を鋳造方向に
押し出すさいに，その送り出し方向を，各サイドダム下
端がロール軸に直交する面に対してロールの中央側に近
づく方向に傾くように，所定の角度だけ傾斜させてあ
る。In the thin plate continuous casting machine using such a grinding type side dam, the apparatus of the present invention first rolls the roll gap (roll gap) toward the roll end by moving the portions 6a, 6b, 7a, 7b of the roll circumferential surface which are in contact with the side dam. ) To reduce the diameter. That is, taper is applied so that the circumferential surface is tapered. In the illustrated example, the side dams 3a, 3b are arranged so that a part of their thickness contacts the tapered portions 6a, 6b, 7a, 7b. When each side dam 3a, 3b is extruded in the casting direction, the feeding direction is inclined by a predetermined angle so that the lower end of each side dam is inclined toward the center of the roll with respect to the plane orthogonal to the roll axis. There is.
【００１４】より具体的に説明すると，各サイドダム3
a,3b の背面にはバックアッププレート8a,8b が固設さ
れており，このバックアッププレート8a,8b に取付けた
ナット９（図例では一つのプレートに対して両側部に２
個ずづ，合計４個ある）に, ネジ付支柱10 (一つのプレ
ートに対して二本ある) を螺合挿入することによって，
サイドダム3a,3b が所定の位置に置かれ, 各ネジ付支柱
10を軸廻りに回転させることによって，バックアッププ
レート8a,8b が移動し，これに伴ってサイドダム3a,3b
が移動する。各ネジ付支柱10は, 図示されていないが，
軸廻りの回転動力が伝達されるように，動力部に接続さ
れている。各ネジ付支柱10は鋳造中は軸廻りに回転はす
るけれどもその位置は変動しない。More specifically, each side dam 3
Backup plates 8a and 8b are fixed to the back surfaces of a and 3b, and nuts 9 attached to the backup plates 8a and 8b (in the example shown, one plate has two nuts on both sides).
By screwing the screwed columns 10 (two for one plate) into each of them, there are four in total.
The side dams 3a and 3b are put in place,
By rotating 10 around the axis, the backup plates 8a, 8b move, and along with this, the side dams 3a, 3b.
Moves. Each threaded column 10 is not shown,
It is connected to the power unit so that the rotational power around the shaft is transmitted. Each of the threaded columns 10 rotates about the axis during casting, but its position does not change.
【００１５】各ネジ付支柱10が下方に行くほどロールの
中央部分に近づく方向に傾斜しており，これを軸廻りに
回転するとこの傾斜に沿ってサイドダム3a,3b が送り出
されることになる。この傾斜角度は，本発明者らの経験
によると１度以上10度以下であるのがよいことがわかっ
た。Each of the screwed columns 10 is inclined in a direction approaching the central portion of the roll as it goes downward, and when it is rotated around the axis, the side dams 3a, 3b are sent out along this inclination. According to the experience of the present inventors, it has been found that this inclination angle is preferably 1 degree or more and 10 degrees or less.
【００１６】一方, サイドダム3a,3b と摺接するロール
円周面 (特にテーパ付円周面6a,6b,7a,7b) はサイドダ
ムを研削し易いように，粗面に形成されており，また，
図示の例では，ロール1a,1b の端面 (軸と直交する外側
面・・これをサイド面Ｓと呼ぶ) ともサイドダム3a,3b
の内面が摺接するので，このサイド面Ｓも粗面に形成し
てある。On the other hand, the roll circumferential surface (in particular, the tapered circumferential surface 6a, 6b, 7a, 7b) which is in sliding contact with the side dams 3a, 3b is formed in a rough surface so that the side dam can be easily ground.
In the illustrated example, the end surfaces of the rolls 1a, 1b (the outer surface orthogonal to the axis ... This is called the side surface S) and the side dams 3a, 3b
Since the inner surface of the sliding contact, the side surface S is also formed as a rough surface.
【００１７】図２は，ロール軸に平行な垂直面でロール
ギヤップの中央線部分を切断したとき（図３のＸ−Ｘ矢
視断面）のサイドダム3a部分の状態を示したものであ
る。また図３は，ロール軸に平行な水平面でロール最狭
隙部分を切断したとき（図２のＹ−Ｙ矢視断面）のサイ
ドダム3a部分の状態を示したものである。FIG. 2 shows a state of the side dam 3a when the center line portion of the roll gearup is cut by a vertical plane parallel to the roll axis (cross section taken along the line XX in FIG. 3). Further, FIG. 3 shows a state of the side dam 3a portion when the narrowest gap portion of the roll is cut on a horizontal plane parallel to the roll axis (cross section taken along the line YY in FIG. 2).
【００１８】図２に見られるように，サイドダム3aは垂
直面に対して角度θを持ってテーパ付円周面6a,7a の上
に送り出される。そのさい，サイドダム3aの底部および
内面のうち，回転する円周面6a,6b とサイド面Ｓと摺接
する部分はこれらの形状に転写する形のくぼみをもって
研削される。一方，湯溜り２内の溶湯から双方の円周面
の表面に形成された凝固シエルが双方のロールの回転に
よって互いに合着する位置（ロールギヤップの最狭隙部
より若干上方の位置，図２の破線Ｚで示す）より下方で
は，合体した凝固シエルがロールギヤップで圧延される
ので，幅方向への張り出しが生ずる。この張り出し部分
とサイドダム3aの内面が摺接することになる。このた
め，当初は厚みＴを有していたサイドダム3aは，ロール
ギヤップに対応する中央部分ではその厚みが徐々に減少
する。As shown in FIG. 2, the side dam 3a is delivered onto the tapered circumferential surfaces 6a and 7a at an angle θ with respect to the vertical surface. At that time, of the bottom portion and the inner surface of the side dam 3a, the portions that are in sliding contact with the rotating circumferential surfaces 6a and 6b and the side surface S are ground with a recess that is transferred to these shapes. On the other hand, the position where the solidified shells formed on the surfaces of both circumferential surfaces from the molten metal in the pool 2 coalesce with each other by the rotation of both rolls (a position slightly above the narrowest gap of the roll gearup, as shown in FIG. (Indicated by a broken line Z), the coalesced solidified shell is rolled by the roll gap, so that overhang occurs in the width direction. This overhanging portion is in sliding contact with the inner surface of the side dam 3a. Therefore, the side dam 3a, which initially has the thickness T, gradually decreases in thickness in the central portion corresponding to the roll gearup.
【００１９】しかし，角度θを持って下方がロール中央
部分に向かうようにサイドダムが送り出されるので，前
記の凝固シエルによって研削される部分はロール中央部
分に向かって張り出すことになる。このため，研削され
る量と中央部分に張り出す部分とが相殺し，全体として
は，ロール最狭隙部における張り出し先端面12 (図３参
照）に見られるようにテーパ付円周面6a,7a よりも若干
内側に張り出すことができる。However, since the side dam is sent with the angle θ directed downward toward the central portion of the roll, the portion ground by the solidification shell projects toward the central portion of the roll. Therefore, the amount of grinding and the portion protruding to the central portion cancel each other out, and as a whole, as shown in the protruding tip surface 12 (see FIG. 3) in the narrowest gap of the roll, the tapered circumferential surface 6a, Can project slightly inward from 7a.
【００２０】しかも，この張り出し先端面12は, 図３に
見られるように，テーパ付円周面6aと7aとの間の外広が
りに厚みをもつ部分13によってバックアップされる。し
たがって，ロールギヤップに挟まれるサイドダム部分
は，鋳造される凝固シエルや薄板によって研削されるけ
れども，その厚みと強度の補償が確保される。Moreover, this overhanging tip surface 12 is backed up by a portion 13 having an outwardly wide thickness between the tapered circumferential surfaces 6a and 7a, as seen in FIG. Therefore, although the side dam portion sandwiched by the roll gaps is ground by the solidified shell or thin plate that is cast, compensation for its thickness and strength is ensured.
【００２１】なお，ロール最狭隙部より下方の位置で
は，薄板の圧延は起きないので薄板の幅広がりは生じな
い。このため，最狭隙部を通過するときの形状 (図３の
12や13の形状) に対応したサイドダム形状となるが，傾
斜して送り出されるので，薄板４の端面と接触し，その
形状（図２の斜線ハッチ部分14) は徐々に厚みを減少す
るか，或いは振動する薄板に触れて一部は自然にスポー
リングする。しかし，もはや溶湯をせき止める役割は果
たし終えているので，鋳造には何ら影響することはな
い。At a position below the narrowest gap of the roll, rolling of the thin plate does not occur, so that the width of the thin plate does not spread. Therefore, the shape when passing through the narrowest gap (Fig. 3)
The shape of the side dam corresponds to that of 12 or 13), but since it is sent out with an inclination, it comes into contact with the end surface of the thin plate 4 and its shape (the hatched portion 14 in Fig. 2) gradually decreases in thickness. Or touch the vibrating thin plate and part of it spalls naturally. However, since it has finished playing the role of stopping the molten metal, it has no effect on casting.
【００２２】角度θが大きくなると，これにつれて中央
部分に張り出す程度も大きくなる。したがって，鋳造条
件に応じて角度θを調節することによって，前記の相殺
をバランスさせることができる。しかし，あまり角度θ
を大きくすると，凝固シエルによって研削される量が大
きくなり過ぎるのでθは10度以下とし，この状態で鋳造
条件 (回転速度や注湯量等) を調節するのがよい。As the angle θ increases, the degree to which the angle θ projects to the central portion also increases. Therefore, the offset can be balanced by adjusting the angle θ according to the casting conditions. However, the angle θ
If the value is increased, the amount ground by the solidification shell becomes too large, so θ should be 10 degrees or less, and the casting conditions (rotation speed, pouring amount, etc.) should be adjusted in this state.
【００２３】テーパ付円周面6a,6a,7a,7b 並びにサイド
面Ｓを粗面に形成するには，サンドブラスト処理や硬質
粉の溶射による塗布処理を採用するのがよい。また，こ
れらの粗面を鋳造中に常に更新するために図１に示すよ
うにブラシ15を取付けておくのがよい。In order to form the tapered circumferential surfaces 6a, 6a, 7a, 7b and the side surfaces S to be rough surfaces, it is preferable to employ sandblasting or hard powder spraying. Further, in order to constantly update these rough surfaces during casting, it is preferable to attach a brush 15 as shown in FIG.
【００２４】本発明者らは，１トンのSUS304の溶鋼を対
象として本発明装置による鋳造を試みた。すなわち，図
１に示した装置において，円周面の径が400mm, ロール
幅が300mmの内部冷却式ロールに対し, ロール両端部よ
り30mmの範囲で勾配4.5/30のテーパを付け，サイドダム
の送り出し角度θを３度に設定して, 該溶鋼を鋳造し
た。テーパ付円周面6a,6b, 7a,7bとサイド面Ｓには，サ
ンドブラスト処理によって粗面を形成しておいた。溶湯
温度1520℃で鋳造を開始し, 連続的に板厚２mmの鋳造板
を得た。１トン完鋳後もサイドダム下端部の破損もな
く，この鋳造で得られた鋳造板のエッジ形状は両端とも
全長にわたって良好であった。The inventors of the present invention tried casting with the apparatus of the present invention for 1 ton of molten SUS304 steel. That is, in the device shown in Fig. 1, an internal cooling type roll with a circumferential surface diameter of 400 mm and a roll width of 300 mm was tapered at a slope of 4.5 / 30 within 30 mm from both ends of the roll, and the side dam was sent out. The molten steel was cast with the angle θ set to 3 degrees. Rough surfaces were formed on the tapered circumferential surfaces 6a, 6b, 7a, 7b and the side surfaces S by sandblasting. Casting was started at a molten metal temperature of 1520 ° C, and continuously cast plates with a thickness of 2 mm were obtained. Even after 1 ton was completely cast, the lower end of the side dam was not damaged, and the edge shape of the cast plate obtained by this casting was good over both lengths.
【００２５】[0025]
【発明の効果】以上に説明したように，研削ダム方式に
よる双ロール式連鋳機において，本発明によれば，ロー
ル端のロールギヤップ部で挟まれるサイドダムの厚みが
確保され，この厚みの増加によってサイドダムの強度が
補償されると共に, サイドダムを送り出す応力がロール
中央部分に向かう方向のベクトルを有することから溶湯
に対するシール性が向上したので，鋳造中におけるサイ
ドダム下端部の破損が防止され, より安定した鋳造が実
現できる。As described above, in the twin roll type continuous casting machine using the grinding dam method, according to the present invention, the thickness of the side dam sandwiched between the roll gearup portions at the roll ends is secured, and this thickness increase The strength of the side dam is compensated by and the stress that sends out the side dam has a vector in the direction toward the center of the roll, which improves the sealability against the molten metal, preventing damage to the lower end of the side dam during casting, and increasing stability. Casting can be realized.
【図１】本発明装置の一実施例を示す傾斜図である。FIG. 1 is a perspective view showing an embodiment of the device of the present invention.
【図２】図１の装置におけるロール軸に平行な垂直面で
ロールギヤップの中央線部分を切断したとき（図３のＸ
−Ｘ断面）のサイドダム部分を示す略断面図である。2 is a cross-sectional view of the center line of the roll gearup cut along a vertical plane parallel to the roll axis in the apparatus of FIG. 1 (X in FIG. 3).
FIG. 6 is a schematic cross-sectional view showing a side dam portion of (X cross section).
【図３】図２のＹ−Ｙ矢視断面図である。3 is a cross-sectional view taken along the line YY of FIG.
1a,1b 内部冷却ロール ２ 湯溜り 3a,3b サイドダム ４ 鋳造された薄板 6a,6b,7a,7b テーパ付円周面 8a,8b バックアッププレート 10 ネジ付支柱 12 ロール最狭隙部に張り出すサイドダム端面 13 テーパ付円周面で挟まれるサイドダム部分 1a, 1b Internal cooling roll 2 Hot water pool 3a, 3b Side dam 4 Cast thin plate 6a, 6b, 7a, 7b Tapered circumferential surface 8a, 8b Backup plate 10 Threaded column 12 Roll side dam end surface protruding into the narrowest gap 13 Side dam part sandwiched between tapered circumferential surfaces
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長谷川 守弘 山口県新南陽市野村南町4976番地 日新製 鋼株式会社鉄鋼研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Morihiro Hasegawa 4976 Nomuraminami-cho, Shinnanyo-shi, Yamaguchi Nisshin Steel Co., Ltd.
Claims (5)
却ロールを平行に対向配置し，該ロール対の円周面上に
湯溜りを形成させるための一対のサイドダムを，その厚
みの一部または全部がロール円周面上に位置するように
その底部の少なくとも一部をロールの円周面に接触させ
て配設すると共にロールと接触するサイドダム部分を易
削性耐火物材料で構成し，このサイドダムを鋳造の方向
に向けて所定の速度で送り出す機構を設け，この送り出
し機構による押し圧によってロール円周面と接するサイ
ドダム部分を回転するロール表面で研削消耗させつつ鋳
造する薄板連鋳装置において，サイドダムと接触するロ
ール円周面の部分をロール端に向かうほどロールギャッ
プが広がるように縮径させ，そして，前記の送り出し機
構によるサイドダムの送り出し方向を，ロール軸に直交
する面に対して，サイドダム下端がロールの中央側に近
づく方向に，所定の角度だけ傾斜させたことを特徴とす
る薄板連鋳機。1. A pair of side dams for arranging a pair of internal cooling rolls that rotate in mutually opposite directions in parallel and facing each other and forming a pool on the circumferential surface of the roll pair, part of their thickness or At least a part of the bottom of the roll is placed on the circumferential surface of the roll so as to be in contact with the circumferential surface of the roll, and the side dam portion that comes into contact with the roll is made of a machinable refractory material. In a thin plate continuous casting device that is equipped with a mechanism that feeds out the side dam at a predetermined speed in the casting direction, and uses the pushing force of this feeding mechanism to grind and exhaust the side dam portion in contact with the roll circumferential surface on the rotating roll surface, The part of the roll circumferential surface that contacts the side dam is reduced in diameter so that the roll gap becomes wider toward the end of the roll, and the side dam by the above-mentioned feeding mechanism is used. The thin plate continuous casting machine characterized in that the feeding direction of is inclined by a predetermined angle in the direction in which the lower end of the side dam approaches the center of the roll with respect to the plane orthogonal to the roll axis.
10度以下である請求項１に記載の薄板連鋳機。2. The inclination angle in the sending direction is 1 degree or more.
The thin plate continuous casting machine according to claim 1, which is 10 degrees or less.
は，研削能を持つ粗面に形成されている請求項１または
２に記載の薄板連鋳機。3. A thin plate continuous casting machine according to claim 1, wherein the roll circumferential surface portion in contact with the side dam is formed into a rough surface having a grinding ability.
その厚みの一部がロール円周面上に位置するように設置
され，厚みの他部はロールで研削されないまま鋳造方向
に送り出される請求項１，２または３に記載の薄板連鋳
機。4. The side dam made of easily machinable refractory material,
The thin plate continuous casting machine according to claim 1, 2 or 3, wherein the thin plate continuous casting machine is installed such that a part of its thickness is located on the circumferential surface of the roll, and the other part of the thickness is sent out in the casting direction without being ground by the roll.
に形成されており，サイドダムの厚みの他部がこの粗面
によってロール軸方向にも研削消耗される請求項４に記
載の薄板連鋳機。5. The thin plate according to claim 4, wherein the side surface of the roll is formed into a rough surface having grinding ability, and the other part of the thickness of the side dam is ground and consumed in the roll axial direction by the rough surface. Continuous casting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097093A JP3071295B2 (en) | 1992-03-24 | 1992-03-24 | Continuous sheet casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4097093A JP3071295B2 (en) | 1992-03-24 | 1992-03-24 | Continuous sheet casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05269551A true JPH05269551A (en) | 1993-10-19 |
| JP3071295B2 JP3071295B2 (en) | 2000-07-31 |
Family
ID=14183028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4097093A Expired - Lifetime JP3071295B2 (en) | 1992-03-24 | 1992-03-24 | Continuous sheet casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3071295B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012145798A1 (en) * | 2011-04-27 | 2012-11-01 | Bluescope Steel Limited | Twin roll caster and method of control thereof |
| US20140262122A1 (en) * | 2013-03-15 | 2014-09-18 | Nucor Corporation | Strip casting apparatus with improved side dam force control |
-
1992
- 1992-03-24 JP JP4097093A patent/JP3071295B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012145798A1 (en) * | 2011-04-27 | 2012-11-01 | Bluescope Steel Limited | Twin roll caster and method of control thereof |
| US8397794B2 (en) | 2011-04-27 | 2013-03-19 | Castrip, Llc | Twin roll caster and method of control thereof |
| US20140262122A1 (en) * | 2013-03-15 | 2014-09-18 | Nucor Corporation | Strip casting apparatus with improved side dam force control |
| WO2014138800A1 (en) * | 2013-03-15 | 2014-09-18 | Bluescope Steel Limited | Strip casting apparatus with improved side dam force control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3071295B2 (en) | 2000-07-31 |
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