JPH07256401A - Twin roll type continuous caster - Google Patents
Twin roll type continuous casterInfo
- Publication number
- JPH07256401A JPH07256401A JP7376594A JP7376594A JPH07256401A JP H07256401 A JPH07256401 A JP H07256401A JP 7376594 A JP7376594 A JP 7376594A JP 7376594 A JP7376594 A JP 7376594A JP H07256401 A JPH07256401 A JP H07256401A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- cooling
- body sleeve
- type continuous
- cooling roll
- 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.)
- Withdrawn
Links
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一対の冷却ロール間に
溶融金属を注入して金属帯板を製造する双ロール式連続
鋳造機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twin roll type continuous casting machine for producing a metal strip by injecting molten metal between a pair of cooling rolls.
【０００２】[0002]
【従来の技術】内側に向って回転する一対の冷却ロール
間に溶融金属を注入し、これを急冷凝固して金属帯板を
製造する双ロール式連続鋳造手段はベッセマー法として
知られており、この方法によるときは、従来のような多
段階にわたる熱延工程を必要とすることなく、また最終
形状にする圧延も軽度なもので済むために、工程および
設備の簡略化が可能となる。2. Description of the Related Art A twin roll type continuous casting means for injecting a molten metal between a pair of cooling rolls rotating inward and rapidly solidifying the molten metal is known as a Bessemer method, According to this method, it is possible to simplify the process and equipment, because the conventional hot rolling process in multiple stages is not required and the rolling to the final shape is light.
【０００３】図３（ａ），（ｂ）は、この双ロール式連
続鋳造を実施する装置の一例を示す図面であり、この鋳
造装置は、互いに逆方向に回転する一対の冷却ロール２
１ａ，２１ｂを適当な間隔で配置し、ロール軸方向両端
をサイド堰２２で仕切って湯溜まり部２３を形成する。3 (a) and 3 (b) are drawings showing an example of an apparatus for carrying out this twin roll type continuous casting. This casting apparatus has a pair of cooling rolls 2 rotating in opposite directions.
1a and 21b are arranged at appropriate intervals, and both ends in the roll axial direction are partitioned by side dams 22 to form a basin 23.
【０００４】そして上方から湯溜まり部２３に溶融金属
を注入しながら互に内側に回転させると、注入された溶
融金属は冷却ロール２１ａ，２１ｂと接触し、抜熱され
てその結果それぞれの冷却ロール表面に凝固シェル２４
が形成される。この凝固シェル２４は成長しながらロー
ルの回転に伴って接合し、さらにキスポイント２５にて
圧下されて所定の厚さの金属帯板２６となり、ロールの
下方に送出されて金属帯板を製造する。When the molten metal is poured into the pool 23 from above and rotated inwardly, the molten metal is brought into contact with the cooling rolls 21a and 21b, and the heat is removed, and as a result, the respective cooling rolls are cooled. Solidified shell 24 on the surface
Is formed. The solidified shell 24 is joined as the roll rotates as it grows, and is further pressed at a kiss point 25 to become a metal strip 26 having a predetermined thickness, which is fed below the roll to produce a metal strip. .
【０００５】[0005]
【発明が解決しようとする課題】ところで通常この一対
の冷却ロールは、溶融金属と接する周面は直接熱を受け
て熱膨張するが、ロール内部は冷却されるので、全体と
してロール表面は突出して太鼓状に変形し、このロール
で鋳造した場合の金属帯板の幅方向の厚み分布は両端部
は厚く中央部は薄くなる。Generally, in the pair of cooling rolls, the peripheral surfaces in contact with the molten metal are directly subjected to heat to thermally expand, but the insides of the rolls are cooled, so that the roll surfaces as a whole project. When deformed into a drum shape and cast by this roll, the thickness distribution in the width direction of the metal strip is thick at both ends and thin at the center.
【０００６】特にこのような両端部が厚くなる金属帯板
の幅方向の不均一を、事後の圧延工程等で矯正すること
は容易ではなく、また帯板端部の割れの原因ともなり、
また生産性の低下となる。In particular, it is not easy to correct such unevenness in the width direction of the metal strip whose both ends are thick in the subsequent rolling process, and it also causes cracks in the end portions of the strip.
In addition, productivity will be reduced.
【０００７】この対策として、冷却ロールの中央部を予
想される熱膨張分だけ予め小さくするいわゆる逆クラウ
ンを付することが考えられるが、鋳造条件の変化による
冷却ロールへの溶湯よりの入熱変化に対応できず、帯板
の幅方向の板厚分布を充分に制御することは望めない。As a countermeasure against this, it is conceivable to add a so-called reverse crown for reducing the central portion of the cooling roll in advance by an expected thermal expansion amount. However, a change in heat input from the molten metal to the cooling roll due to a change in casting conditions. However, it is impossible to fully control the strip thickness distribution in the width direction of the strip.
【０００８】この逆クラウンを予め付した冷却ロール
を、さらに鋳造条件の変化に対応してそのクラウン量を
調整し、鋳造した帯板の幅方向の板厚を所望の分布に制
御する手段として、例えば特開昭６０−２７４５８号お
よび特開昭６３−２１５３４６号，特開昭６３−２１５
３４７号各公報に、それぞれ連続鋳造機，双ロール式連
鋳機として開示されている。The cooling roll to which the reverse crown is previously attached is further adjusted as the means for adjusting the amount of the crown in response to changes in casting conditions and controlling the widthwise thickness of the cast strip to a desired distribution. For example, JP-A-60-27458, JP-A-63-215346, and JP-A-63-215.
No. 347 publications disclose a continuous casting machine and a twin roll type continuous casting machine, respectively.
【０００９】しかしこれら公報に開示された技術は、い
ずれも狭隘な冷却ロールのスリーブ内に、油圧シリンダ
ー等の機構を内蔵する等複雑な構造となっており、かつ
稼動中の冷却ロールの外部からこれら機構を正確に制御
して、所望のロールクラウンを維持することは極めて困
難である。However, the techniques disclosed in these publications each have a complicated structure in which a mechanism such as a hydraulic cylinder is built in the sleeve of a narrow cooling roll, and the outside of the cooling roll in operation is used. Precise control of these mechanisms to maintain the desired roll crown is extremely difficult.
【００１０】本発明は上記課題に鑑み、簡便な手段によ
り冷却ロールを所望のロールクラウンとなるよう制御可
能とする双ロール式連続鋳造機を提供する。In view of the above problems, the present invention provides a twin roll type continuous casting machine capable of controlling a cooling roll to have a desired roll crown by a simple means.
【００１１】[0011]
【課題を解決するための手段】本発明は、平行に配置し
た一対の冷却ロール間に溶融金属を注入し、これを急冷
凝固して金属帯板を製造する双ロール式連続鋳造機にお
いて、前記冷却ロールのシャフト部を構成する筒状の胴
体スリーブを水密構造とするとともに、ロール主軸を通
じて胴体スリーブ内部に加圧管を接続し、該水密構造と
した胴体スリーブの外周には冷却管を内蔵した銅スリー
ブを嵌着し、予め冷却ロール中央部を凹形にする逆クラ
ウンを付与したことを特徴とする双ロール式連続鋳造機
である。The present invention provides a twin roll continuous casting machine for producing a metal strip by injecting molten metal between a pair of cooling rolls arranged in parallel and rapidly cooling and solidifying the molten metal. A tubular body sleeve forming the shaft portion of the cooling roll has a watertight structure, and a pressurizing pipe is connected to the inside of the body sleeve through the roll main shaft, and a copper pipe having a cooling tube built in the outer periphery of the body sleeve having the watertight structure. The twin roll type continuous casting machine is characterized in that a sleeve is fitted and an inverted crown that makes the central portion of the cooling roll concave is provided in advance.
【００１２】[0012]
【作用】冷却ロール間に溶融金属を注入し、これを急冷
凝固して金属帯板を製造する双ロール式連続鋳造の場
合、冷却ロールが受ける熱量は、主として鋳造する帯板
の板厚により異なり、一般に板厚が大きくなる程ロール
回転はおそく冷却ロールが受ける熱量も大きくなってロ
ール温度は上昇する。In the case of twin roll continuous casting in which molten metal is injected between cooling rolls and rapidly solidified to produce metal strips, the amount of heat received by the cooling rolls depends mainly on the thickness of the strips to be cast. Generally, as the plate thickness increases, the rotation of the roll slows down and the amount of heat received by the cooling roll also increases and the roll temperature rises.
【００１３】この場合、溶融金属と接する周面は直接熱
を受けて熱膨張し、全体としてロール表面は突出する。
しかしロールが過度に膨張すると、図２（ａ）に示すよ
うに太鼓状に変形１１して、このロールで鋳造した場合
の金属帯板の幅方向の厚みは両端部は厚く中央部は薄く
なり、前記したように帯板の厚み分布としては好ましく
ない。In this case, the peripheral surface in contact with the molten metal is directly subjected to heat and thermally expanded, and the roll surface as a whole projects.
However, when the roll expands excessively, it deforms 11 like a drum as shown in FIG. 2 (a), and the widthwise thickness of the metal strip when cast with this roll becomes thicker at both ends and thinner at the center. However, as described above, the thickness distribution of the strip is not preferable.
【００１４】従って通常冷却ロールとしては、図２
（ｂ）に示すように予め中央部を凹形すなわち逆クラウ
ン１２にして製作し、稼動時にロール温度が上昇しても
図２（ｃ）に示すように水平ないし０．５ｍｍ／ｍ程度
の逆クラウン量を維持するようにするのが理想的であ
る。Therefore, as a normal cooling roll, as shown in FIG.
As shown in (b), the central part is made to have a concave shape, that is, an inverted crown 12 in advance, and even if the roll temperature rises during operation, as shown in FIG. 2 (c), it is horizontal or reverse of about 0.5 mm / m. Ideally, the crown amount should be maintained.
【００１５】しかしこのロール温度上昇による逆クラウ
ンの戻りは、上述のように鋳造する鋳片の板厚等により
異なるために、予め中央部に逆クラウンを付しても稼動
時には必ずしも一定になるとは限らない。However, since the return of the reverse crown due to the rise of the roll temperature varies depending on the plate thickness of the cast piece as described above, even if the reverse crown is attached to the central portion in advance, it is not always constant during operation. Not exclusively.
【００１６】本発明は、冷却ロールのシャフト部を構成
する胴体スリーブを水密構造としてロール主軸を通じて
スリーブ内部に加圧管を接続し、胴体スリーブを水圧，
油圧等の液圧により膨出，縮退可能な構造とし、溶融金
属からの受熱と胴体スリーブの加圧による冷却ロールの
膨張量が常に最適になるように液圧を調整し、常に逆ク
ラウン量が最適となるよう制御可能とするものである。According to the present invention, the body sleeve constituting the shaft portion of the cooling roll has a watertight structure, and a pressurizing pipe is connected to the inside of the sleeve through the roll main shaft so that the body sleeve is subjected to water pressure,
The structure is such that it can be expanded and contracted by hydraulic pressure such as hydraulic pressure, and the hydraulic pressure is adjusted so that the expansion amount of the cooling roll due to the heat received from the molten metal and the pressurization of the body sleeve is always optimal, and the reverse crown amount is always It is possible to control so that it becomes optimal.
【００１７】この双ロール式連続鋳造機で鋳造を行う場
合、上述のように板厚が大きくなる程ロール回転はおそ
く、冷却ロールが受ける熱量も大きくなるので、液圧に
よる冷却ロールの膨出を小さくし、また薄板の場合はロ
ール回転は速く冷却ロールが受ける熱量も小さいので、
液圧による冷却ロールの膨出を大きくし、このようにし
て冷却ロールの膨張量を加減して常に最適の逆クラウン
量を保持するものである。When casting is performed by this twin roll type continuous casting machine, as the plate thickness increases, the roll rotation slows down and the amount of heat received by the cooling roll also increases, so that the cooling roll swells due to liquid pressure. In the case of a thin plate, roll rotation is fast and the amount of heat received by the cooling roll is small, so
The expansion of the cooling roll due to the hydraulic pressure is increased, and the expansion amount of the cooling roll is adjusted in this way to always maintain the optimum reverse crown amount.
【００１８】なお冷却ロールの加工時にロールに与える
逆クラウン量としては、鋳造する鋳片の最大板厚等より
勘案して、予期される最大の熱膨張量を逆クラウンとし
て予めロールに与え加工しておけばよい。Regarding the amount of reverse crown to be applied to the roll during the processing of the cooling roll, the maximum expected thermal expansion amount is given to the roll in advance as the reverse crown in consideration of the maximum plate thickness of the cast piece to be cast. You can leave it.
【００１９】[0019]
【実施例】図１は本発明の実施例の双ロール式連続鋳造
機の冷却ロールを示し、（ａ）図は側断面図，（ｂ）図
は縦断面図である。1 shows a cooling roll of a twin roll type continuous casting machine according to an embodiment of the present invention, wherein (a) is a side sectional view and (b) is a longitudinal sectional view.
【００２０】本実施例の冷却ロール１は、主軸２に取り
付けられた側板３に筒状の胴体スリーブ４を取り付けて
シャフト部を構成し、胴体スリーブ４の外周に冷却管６
を内蔵した銅スリーブ５を嵌着して構成される。また銅
スリーブ５周面は、前記図２（ｂ）に示すように中央部
を凹形にするように事前に逆クラウン１２が付与されて
いる。In the cooling roll 1 of this embodiment, a tubular body sleeve 4 is attached to a side plate 3 attached to a main shaft 2 to form a shaft portion, and a cooling pipe 6 is provided on the outer circumference of the body sleeve 4.
It is configured by fitting a copper sleeve 5 containing therein. In addition, as shown in FIG. 2B, the peripheral surface of the copper sleeve 5 is provided with an inverted crown 12 in advance so that the central portion thereof has a concave shape.
【００２１】冷却ロールのシャフト部を構成する胴体ス
リーブ４は、両側面を側板３により封鎖して内面を水密
構造とし、さらにロール主軸２を通じてスリーブ内部に
加圧管７を接続し、外部は例えば油圧ポンプ（図示な
し）に接続し、胴体スリーブ４を油圧により径方向に膨
出，縮退可能な構造としている。The body sleeve 4 constituting the shaft portion of the cooling roll has a watertight structure in which both side surfaces are closed by the side plates 3 and the pressurizing pipe 7 is connected to the inside of the sleeve through the roll main shaft 2, and the outside is, for example, hydraulic pressure. It is connected to a pump (not shown), and the body sleeve 4 has a structure capable of radially expanding and contracting by hydraulic pressure.
【００２２】加圧媒体として油圧を使用する場合は、沸
点の高い油圧装置用作動油が好ましい。また加圧範囲と
しては、絶対圧０〜１０００ｋｇ／ｃｍ2 程度まで適用
可能であるが、理論上は負圧を適用できる範囲は非常に
狭く、実用上は正圧の圧力範囲のみを考慮すればよい。When hydraulic pressure is used as the pressurizing medium, hydraulic fluid for hydraulic devices having a high boiling point is preferable. Further, as a pressurizing range, an absolute pressure of about 0 to 1000 kg / cm 2 can be applied, but theoretically, a range in which a negative pressure can be applied is very narrow. In practical use, if only a positive pressure range is considered. Good.
【００２３】またこの際、冷却ロールの冷時の加工時に
おけるロールに与える逆クラウン１２量としては、鋳造
する鋳片の最大板厚等より勘案して、予期される最大の
熱膨張量を逆クラウン量として予めロールに与え加工し
ておけばよい。Further, at this time, as the amount of the reverse crown 12 to be given to the roll during the cold working of the cooling roll, the expected maximum thermal expansion amount is reversed by taking into consideration the maximum plate thickness of the cast piece to be cast and the like. The crown amount may be given to the roll in advance and processed.
【００２４】このように胴体スリーブ４の内面を水密構
造として、この内部を水圧，油圧等の液圧により膨出，
縮退可能な構造とすることにより、溶融金属からの受熱
と胴体スリーブの加圧による冷却ロールの膨張量が常に
最適になるように液圧を調整し、常にロールの逆クラウ
ン量が最適となるよう制御可能とするものである。In this way, the inner surface of the body sleeve 4 is made watertight, and the inside is bulged by hydraulic pressure such as water pressure or hydraulic pressure.
By adopting a retractable structure, the hydraulic pressure is adjusted so that the expansion amount of the cooling roll due to the heat received from the molten metal and the pressurization of the body sleeve is always optimized, and the reverse crown amount of the roll is always optimized. It should be controllable.
【００２５】[0025]
【発明の効果】以上説明した如く本発明の双ロール式連
続鋳造機は、シャフト部を構成する胴体スリーブを水密
構造とし、これを液圧により膨出，縮退可能な構造とす
ることにより、冷却ロールの逆クラウン量を所望の鋳片
クラウン量となるように制御可能とするもので、また鋳
片板厚や材質の変化にも即時に対応でき、寸法精度に優
れた金属帯板を容易に製造することができる。As described above, in the twin roll type continuous casting machine of the present invention, the body sleeve forming the shaft portion has a watertight structure, and the body sleeve can be expanded and contracted by hydraulic pressure to cool the body sleeve. It is possible to control the amount of reverse crown of the roll to the desired amount of slab crown, and it is also possible to immediately respond to changes in slab thickness and material, making it easy to produce metal strips with excellent dimensional accuracy. It can be manufactured.
【図１】本発明の実施例の双ロール式連続鋳造機の冷却
ロールを示し、（ａ）図は側断面図，（ｂ）図は縦断面
図である。FIG. 1 shows a cooling roll of a twin roll type continuous casting machine according to an embodiment of the present invention, wherein (a) is a side sectional view and (b) is a vertical sectional view.
【図２】（ａ）〜（ｃ）図は冷却ロールの熱膨張過程に
おけるロールプロフィルの変化を説明する図面である。2 (a) to 2 (c) are views for explaining changes in roll profile during a thermal expansion process of a cooling roll.
【図３】双ロール式連続鋳造装置の一例を示す図面であ
り、（ａ）図は略側断面図，（ｂ）は斜視図である。3A and 3B are drawings showing an example of a twin roll type continuous casting apparatus, FIG. 3A is a schematic side sectional view, and FIG. 3B is a perspective view.
１ 冷却ロール ２ 主軸 ３ 側板 ４ 胴体スリーブ ５ 銅スリーブ ６ 冷却管 ７ 加圧管 １１ ロールの変形 １２ 逆クラウン ２１ａ，２１ｂ 冷却ロール ２２ サイド堰 ２３ 湯溜まり部 ２４ 凝固シェル ２５ キスポイント ２６ 金属帯板 1 Cooling Roll 2 Spindle 3 Side Plate 4 Body Sleeve 5 Copper Sleeve 6 Cooling Pipe 7 Pressurizing Pipe 11 Roll Deformation 12 Reverse Crown 21a, 21b Cooling Roll 22 Side Weir 23 Hot Water Pool 24 Solidification Shell 25 Kiss Point 26 Metal Strip Plate
Claims (1)
融金属を注入し、これを急冷凝固して金属帯板を製造す
る双ロール式連続鋳造機において、前記冷却ロールのシ
ャフト部を構成する筒状の胴体スリーブを水密構造とす
るとともに、ロール主軸を通じて胴体スリーブ内部に加
圧管を接続し、該水密構造とした胴体スリーブの外周に
は冷却管を内蔵した銅スリーブを嵌着し、予め冷却ロー
ル中央部を凹形にする逆クラウンを付与したことを特徴
とする双ロール式連続鋳造機。1. A twin roll type continuous casting machine in which a molten metal is injected between a pair of cooling rolls arranged in parallel and rapidly cooled and solidified to produce a metal strip, and a shaft portion of the cooling roll is constituted. The tubular body sleeve has a watertight structure, and a pressurizing pipe is connected to the inside of the body sleeve through the roll spindle, and a copper sleeve containing a cooling pipe is fitted to the outer periphery of the watertight body sleeve to cool it in advance. A twin roll type continuous casting machine characterized by being provided with an inverted crown that makes the center of the roll concave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7376594A JPH07256401A (en) | 1994-03-22 | 1994-03-22 | Twin roll type continuous caster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7376594A JPH07256401A (en) | 1994-03-22 | 1994-03-22 | Twin roll type continuous caster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07256401A true JPH07256401A (en) | 1995-10-09 |
Family
ID=13527650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7376594A Withdrawn JPH07256401A (en) | 1994-03-22 | 1994-03-22 | Twin roll type continuous caster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07256401A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100490990B1 (en) * | 2000-12-20 | 2005-05-24 | 주식회사 포스코 | structure for cooling the roll in twin strip caster |
| KR101010625B1 (en) * | 2003-12-23 | 2011-01-25 | 주식회사 포스코 | Continuous Casting Roll with high cooling capacity |
| WO2012051646A1 (en) | 2010-10-18 | 2012-04-26 | Bluescope Steel Limited | Twin roll continuous caster |
| CN103056317A (en) * | 2013-01-28 | 2013-04-24 | 青岛云路新能源科技有限公司 | Cooling structure of copper bush of amorphous crystallizer |
| CN104923755A (en) * | 2015-06-08 | 2015-09-23 | 西安理工大学 | Arc-radiation method for eliminating bulging defect of flat nodular cast iron |
-
1994
- 1994-03-22 JP JP7376594A patent/JPH07256401A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100490990B1 (en) * | 2000-12-20 | 2005-05-24 | 주식회사 포스코 | structure for cooling the roll in twin strip caster |
| KR101010625B1 (en) * | 2003-12-23 | 2011-01-25 | 주식회사 포스코 | Continuous Casting Roll with high cooling capacity |
| WO2012051646A1 (en) | 2010-10-18 | 2012-04-26 | Bluescope Steel Limited | Twin roll continuous caster |
| CN103056317A (en) * | 2013-01-28 | 2013-04-24 | 青岛云路新能源科技有限公司 | Cooling structure of copper bush of amorphous crystallizer |
| CN104923755A (en) * | 2015-06-08 | 2015-09-23 | 西安理工大学 | Arc-radiation method for eliminating bulging defect of flat nodular cast iron |
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| A300 | Withdrawal of application because of no request for examination |
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