JP5091871B2 - Twin roll casting machine, its operating equipment and operating method - Google Patents
Twin roll casting machine, its operating equipment and operating method Download PDFInfo
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- JP5091871B2 JP5091871B2 JP2008540406A JP2008540406A JP5091871B2 JP 5091871 B2 JP5091871 B2 JP 5091871B2 JP 2008540406 A JP2008540406 A JP 2008540406A JP 2008540406 A JP2008540406 A JP 2008540406A JP 5091871 B2 JP5091871 B2 JP 5091871B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/005—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of rolls, wheels or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
本発明は、全般的には双ロール鋳造機に関し、より明細には双ロール鋳造機の鋳造ロールに関する。 The present invention relates generally to twin roll casters and more specifically to a cast roll of a twin roll caster.
一対の相互方向に回転する鋳造ロール間の溶融金属から、ロール間のロール間隙を介して薄金属ストリップを連続鋳造する双ロール方法が公知である。 A twin roll method is known in which a thin metal strip is continuously cast from a molten metal between a pair of mutually rotating casting rolls via a roll gap between the rolls.
図14及び図15は先行技術の連続鋳造機の一例を示す。図に関して、鋳造ロール2は鋳造ロール2周端面でサイド堰1と接触し、鋳造ロール2両端に軸線方向に係合する中空のスタブ軸3を有する(例えば、特許文献1参照)。
鋳造ロール2の両端部は中央部よりも小さく、サイド堰1と接触する形状をしている。連続鋳造機において、鋳造ロール2は製造すべきストリップS厚に従って鋳造ロールのロール間隙が調節できるよう、互いに横方向に並べられている。サイド堰1は鋳造ロール2の大径中央部の端面に各々接し、鋳造ロール2とサイド堰1とが溶融金属Mを収容する構成となっている。鋳造ロールの回転の速度と方向は、外周面が等速で鋳造ロール間隙へと移動するよう設定されている。 Both end portions of the casting roll 2 are smaller than the central portion and have a shape in contact with the side weir 1. In the continuous casting machine, the casting rolls 2 are arranged side by side so that the roll gap of the casting rolls can be adjusted according to the thickness of the strip S to be produced. The side weirs 1 are respectively in contact with the end surface of the central portion of the large diameter of the casting roll 2, and the casting roll 2 and the side weir 1 are configured to accommodate the molten metal M. The rotation speed and direction of the casting roll are set so that the outer peripheral surface moves to the casting roll gap at a constant speed.
サイド堰の位置から半径方向下方に離間して、公知の鋳造ロール2は周方向に等間隔に位置した複数の軸線方向に延びる、即ち長手方向の内部冷却通路4と、長手方向冷却通路4の端に接続した複数の半径方向延出冷却通路5とを有する。冷却通路4は、サイド堰の位置から半径方向下方で鋳造ロールの一端から鋳造ロールの他端へと延びる。端部のボルト7又はプラグ6は長手方向冷却通路4の端を閉じるプラグの役目を果たした。半径方向冷却通路5は鋳造ロールの内周面から長手方向冷却通路4へと直角に延びる。 A known casting roll 2 is spaced radially downward from the position of the side weir and extends in a plurality of axial directions at equal intervals in the circumferential direction, that is, a longitudinal internal cooling passage 4 and a longitudinal cooling passage 4. And a plurality of radially extending cooling passages 5 connected to the ends. The cooling passage 4 extends from one end of the casting roll to the other end of the casting roll in the radial downward direction from the position of the side weir. The end bolt 7 or plug 6 served as a plug to close the end of the longitudinal cooling passage 4. The radial cooling passage 5 extends perpendicularly from the inner peripheral surface of the casting roll to the longitudinal cooling passage 4.
半径方向冷却通路8は中空軸3を貫通していて、冷却水Wを一方の中空軸3から半径方向冷却通路5へ、次いで長手方向冷却通路4、鋳造ロール2他端の対応する半径方向冷却通路8,5へ、そして最後には他方の中空の軸3の内部へと流すことができる。 The radial cooling passage 8 passes through the hollow shaft 3, and the cooling water W passes from one hollow shaft 3 to the radial cooling passage 5, and then the corresponding radial cooling at the other end of the longitudinal cooling passage 4 and the casting roll 2. It can flow into the passages 8 and 5 and finally into the other hollow shaft 3.
斯かる連続鋳造機において、溶融金属Mがサイド堰1及び鋳造ロール2により画成される空間へと注がれて鋳造ロール間のロール間隙上方に溶融金属Mの溜めを形成しつつ熱は半径方向冷却通路5と長手方向冷却通路4を流れる冷却水Wによって除去される。 In such a continuous casting machine, the molten metal M is poured into the space defined by the side weir 1 and the casting roll 2 to form a reservoir of the molten metal M above the roll gap between the casting rolls, and the heat has a radius. The cooling water W flowing through the directional cooling passage 5 and the longitudinal cooling passage 4 is removed.
鋳造ロールが回転するにつれて、鋳造ロール2外周面上で冷却されている金属の形成する凝固殻がストリップSを形成し、ストリップSは鋳造ロールのロール間隙から下方に動く。 As the casting roll rotates, the solidified shell formed by the metal cooled on the outer peripheral surface of the casting roll 2 forms the strip S, and the strip S moves downward from the roll gap of the casting roll.
しかし、溶融金属の冷却速度は、周面から冷却通路への熱伝導率により制限される。 However, the cooling rate of the molten metal is limited by the thermal conductivity from the peripheral surface to the cooling passage.
従って、溶融金属ストリップのより効率的な鋳造を提供する代替の装置及び方法を提供するのが有利であろうということが明らかである。従って、以下に更に充分に記述した特徴を含む適切な代替が提供される。 Thus, it will be apparent that it would be advantageous to provide an alternative apparatus and method that provides more efficient casting of molten metal strip. Accordingly, suitable alternatives are provided that include the features more fully described below.
間にロール間隙を形成する一対の横方向に位置決めされた鋳造ロールを有する金属ストリップ鋳造装置及び方法が開示される。 Disclosed is a metal strip casting apparatus and method having a pair of laterally positioned casting rolls forming a roll gap therebetween.
溶融金属供給システムが溶融金属を鋳造ロール間のロール間隙へと送給して、ロール間隙直上で鋳造ロール上に支持された溶融金属の鋳造溜めを形成する。対の鋳造ロールの各端にそれぞれひとつずつ設けられた、一対のサイド堰が、溶融金属の溜めを画成し、鋳造ロールの軸線方向端面に当接する。 A molten metal supply system delivers molten metal to the roll gap between the casting rolls to form a casting pool of molten metal supported on the casting roll directly above the roll gap. A pair of side weirs, one at each end of the pair of casting rolls, define a molten metal reservoir and abut against the axial end face of the casting roll.
各鋳造ロールは円筒体で構成される。一実施例では、本体は段付円筒体で構成され、円筒形中央部が中央部の各端から軸線方向に延びる円筒形隣接端部よりも外径が大きく、内方に段付された肩部が半径方向延出端面を形成する。 Each casting roll is composed of a cylindrical body. In one embodiment, the body is composed of a stepped cylindrical body, the cylindrical central portion having an outer diameter larger than the cylindrical adjacent end portion extending in the axial direction from each end of the central portion, and a shoulder stepped inwardly. The part forms a radially extending end face.
各鋳造ロールは、中央部内を、典型的には半径方向延出端面間で延びる、複数の冷却通路からも構成される。冷却通路は長手方向冷却通路で構成される。冷却通路は、冷却通路を通る冷却流体に方向変換を受けさせる冷却通路内の少なくとも1つの屈曲部からも構成される。 Each casting roll is also comprised of a plurality of cooling passages that extend within the central portion, typically between radially extending end faces. The cooling passage is constituted by a longitudinal cooling passage. The cooling passage is also composed of at least one bend in the cooling passage that causes the cooling fluid passing through the cooling passage to undergo a change of direction.
各鋳造ロールは、屈曲部内に位置決めされて屈曲部の前後で冷却流体の流れを制御する流れ制御部材からも構成される。 Each casting roll is also composed of a flow control member that is positioned in the bent portion and controls the flow of the cooling fluid before and after the bent portion.
各鋳造ロールは、鋳造ロール内周から延びて長手方向冷却通路に接続する半径方向冷却通路からも構成することができ、長手方向冷却通路と半径方向冷却通路が合わさる個所に屈曲部が形成される。 Each casting roll can also be constituted by a radial cooling passage that extends from the inner periphery of the casting roll and connects to the longitudinal cooling passage, and a bend is formed at the point where the longitudinal cooling passage and the radial cooling passage meet. .
一実施例では、各鋳造ロールは、隣接する長手方向冷却通路を相互接続する少なくとも1つの周方向部分から構成されるので、冷却流体が1つの長手方向冷却通路から隣接する長手方向冷却通路へと入り且つそれに沿って流れることができ、屈曲部が周方向部分内に形成される。 In one embodiment, each casting roll is comprised of at least one circumferential portion that interconnects adjacent longitudinal cooling passages so that cooling fluid flows from one longitudinal cooling passage to an adjacent longitudinal cooling passage. Can enter and flow along, and a bend is formed in the circumferential portion.
一実施例では、流れ制御部材は、屈曲部内に形成・位置決めされて、屈曲部の前後で冷却流体の流れを変える複数のフィンである。 In one embodiment, the flow control member is a plurality of fins that are formed and positioned within the bend to change the flow of cooling fluid before and after the bend.
例えば、フィンは周方向に並べられて、半径方向延出端面付近の位置から突出して長手方向冷却通路の方向に延び、水等の冷却流体は冷却通路内を通過させられる。従って、フィンは屈曲部断面を減少させ、それにより冷却流体の速度を増加させ、鋳造ロールの熱をフィンから冷却流体に伝えることもする。 For example, the fins are arranged in the circumferential direction, project from a position in the vicinity of the radially extending end face, and extend in the direction of the longitudinal cooling passage, and cooling fluid such as water is allowed to pass through the cooling passage. Thus, the fins reduce the bend cross section, thereby increasing the speed of the cooling fluid and also transferring the heat of the casting roll from the fins to the cooling fluid.
一実施例では、流れ制御部材は、屈曲部内に位置決めされて、屈曲部の前後で冷却流体の流れを変える複数のインサート(insert)である。 In one embodiment, the flow control member is a plurality of inserts that are positioned within the bend to change the flow of cooling fluid before and after the bend.
例えば、インサートは屈曲部の一部を満たし、それにより屈曲部断面積を減少させ、それにより水等の冷却流体の速度を増加させ、冷却流体を屈曲部のロール外周面付近へと向かわせもする。 For example, the insert may fill a portion of the bend, thereby reducing the cross-sectional area of the bend, thereby increasing the speed of the cooling fluid, such as water, and directing the cooling fluid toward the periphery of the roll at the bend. To do.
流れ制御部材の可能な例は上記した例だけではない。 The possible examples of flow control members are not limited to those described above.
上記及びその他の特徴は、添付図面を参照して考察した本発明についての以下の詳細な記述から明らかとなるであろう。 These and other features will become apparent from the following detailed description of the invention considered with reference to the accompanying drawings.
おおまかに言えば、図1乃至図5は中央部と、サイド堰に隣接した肩部とを備えた円筒形鋳造ロールを示している。肩部は中央部の半径方向延出端面を限定する。鋳造ロールは、鋳造ロール各々の中央部の一方の肩部から他方の肩部へと延びる長手方向冷却通路を有する。半径方向冷却通路は鋳造ロール各々の内周面から延びる。半径方向冷却通路は半径方向延出端面付近に位置している。閉じた底端を有する円筒形プラグが長手方向冷却通路の端に係合する。使用時に、冷却水は半径方向冷却通路、長手方向冷却通路、そして鋳造ロールの反対側の端のもう一つの半径方向冷却通路を順次流れる。 Roughly speaking, FIGS. 1 to 5 show a cylindrical casting roll with a central portion and a shoulder adjacent to the side weir. The shoulder defines a radially extending end face at the center. The casting roll has a longitudinal cooling passage that extends from one shoulder at the center of each casting roll to the other shoulder. The radial cooling passage extends from the inner peripheral surface of each casting roll. The radial cooling passage is located near the radially extending end face. A cylindrical plug having a closed bottom end engages the end of the longitudinal cooling passage. In use, the cooling water sequentially flows through a radial cooling passage, a longitudinal cooling passage, and another radial cooling passage at the opposite end of the casting roll.
より明細に言えば、図1乃至図5は、ここで開示した鋳造ロールの一実施例を備えた連続鋳造機を示している。 More specifically, FIGS. 1-5 show a continuous casting machine with one embodiment of the casting roll disclosed herein.
斯かる鋳造機の有する鋳造ロール12は、外径は中央部17の方がロール端の端部28よりも大きい。中央部17は半径方向延出端面を有し、サイド堰11が鋳造機の作動位置で中央部17端面に接する。鋳造ロール12は2端部28に軸線方向に係合する中空のスタブ軸13からも構成される。スタブ軸13は、鋳造ロール12の2端部28の外径と同様の径を有する。 As for the casting roll 12 which such a casting machine has, the outer diameter of the center part 17 is larger than the edge part 28 of a roll end. The central portion 17 has a radially extending end surface, and the side dam 11 contacts the end surface of the central portion 17 at the operating position of the casting machine. The casting roll 12 is also composed of a hollow stub shaft 13 that engages the two end portions 28 in the axial direction. The stub shaft 13 has a diameter similar to the outer diameter of the two end portions 28 of the casting roll 12.
長手方向冷却通路14は、鋳造ロール12中央部17の半径方向延出端面間で鋳造ロール12内を通る。長手方向冷却通路14は鋳造ロール12の周方向にほぼ等間隔に配される。この配置で、長手方向冷却通路14はロール外面との良好な熱伝達関係を持つ。 The longitudinal cooling passage 14 passes through the casting roll 12 between the radially extending end faces of the central portion 17 of the casting roll 12. The longitudinal cooling passages 14 are arranged at substantially equal intervals in the circumferential direction of the casting roll 12. With this arrangement, the longitudinal cooling passage 14 has a good heat transfer relationship with the outer surface of the roll.
半径方向冷却通路15は鋳造ロール12端部28付近で鋳造ロール内周面から鋳造ロール12内を半径方向に延び、長手方向冷却通路14と接続する。従って、長手方向冷却通路14及び半径方向冷却通路15はそれらの位置で直角屈曲部を形成する。 The radial cooling passage 15 extends radially in the casting roll 12 from the inner peripheral surface of the casting roll in the vicinity of the end 28 of the casting roll 12 and is connected to the longitudinal cooling passage 14. Thus, the longitudinal cooling passage 14 and the radial cooling passage 15 form a right angle bend at those locations.
更に又、円形のプレート状のプラグ19は長手方向冷却通路14の両端を閉じる。 Furthermore, a circular plate-like plug 19 closes both ends of the longitudinal cooling passage 14.
プラグ19はスナップリング20により鋳造ロール12に固定される。Oリングなどのシール材もプラグ19と長手方向冷却通路14の内周面との間に使われる。従って、冷却水Wは、長手方向冷却通路14と連通している半径方向冷却通路15の一方、長手方向冷却通路14、そして長手方向冷却通路14と連通している半径方向冷却通路15の他方と、連続して順次流れさせられる。 The plug 19 is fixed to the casting roll 12 by a snap ring 20. A sealing material such as an O-ring is also used between the plug 19 and the inner peripheral surface of the longitudinal cooling passage 14. Accordingly, the cooling water W is communicated with one of the radial cooling passages 15 communicating with the longitudinal cooling passage 14, the longitudinal cooling passage 14, and the other of the radial cooling passages 15 communicating with the longitudinal cooling passage 14. , Continuously and sequentially.
更に、円筒形スペーサ31が半径方向冷却通路15各々に位置決めされ、長手方向冷却通路14内に部分的に延びるバッフル32を限定する。 In addition, a cylindrical spacer 31 is positioned in each radial cooling passage 15 to define a baffle 32 that extends partially into the longitudinal cooling passage 14.
バッフル32はスペーサ31の先端部に一体的に設けられる。バッフル32は、長手方向冷却通路14,15により限定される屈曲部の内隅から屈曲部の外隅に向けて外向きに形成且つ位置決めされて突出しており、通路断面積はバッフル32前後で半減される。 The baffle 32 is integrally provided at the tip of the spacer 31. The baffle 32 protrudes outwardly from the inner corner of the bent portion defined by the longitudinal cooling passages 14 and 15 toward the outer corner of the bent portion, and the passage cross-sectional area is halved before and after the baffle 32. Is done.
スタブ軸13は中空であり、スタブ軸13を介し半径方向に延びる半径方向冷却通路18を含むので、冷却水Wは、長手方向冷却通路14と連通する半径方向冷却通路15の一方、長手方向冷却通路14、半径方向冷却通路15の他方、そして半径方向冷却通路18内の回転継手等へと連続して順次流れることができる。 Since the stub shaft 13 is hollow and includes a radial cooling passage 18 extending radially through the stub shaft 13, the cooling water W is cooled in the longitudinal direction on one side of the radial cooling passage 15 communicating with the longitudinal cooling passage 14. The flow can continuously flow sequentially to the other of the passage 14, the radial cooling passage 15, the rotary joint in the radial cooling passage 18, and the like.
連続鋳造機の操業においては、対の鋳造ロール12、スタブ軸13及びプラグ16が互いに横方向に位置決めされ、製造されるべきストリップSの厚に応じて鋳造ロールのロール間隙が調節できるようになっている。加えて、サイド堰11が鋳造ロール12中央部17の半径方向延出端面に接する。 In the operation of the continuous casting machine, the pair of casting rolls 12, the stub shaft 13 and the plug 16 are positioned laterally with respect to each other so that the roll gap of the casting roll can be adjusted according to the thickness of the strip S to be manufactured. ing. In addition, the side weir 11 is in contact with the radially extending end surface of the center portion 17 of the casting roll 12.
斯かる連続鋳造機において、溶融金属がサイド堰11と鋳造ロール12により画成されたロール間隙上方の空間へ注がれて溶融金属の鋳造溜めMを形成しつつ、熱が半径方向冷却通路15及び長手方向冷却通路14を流れる冷却水Wにより鋳造ロール12から除去される。鋳造ロールが回転するにつれて、鋳造ロール12の外周面により冷却された金属がロール間隙で下方に移動するストリップSを形成する。 In such a continuous casting machine, the molten metal is poured into a space above the roll gap defined by the side weir 11 and the casting roll 12 to form a molten metal casting pool M, and heat is supplied to the radial cooling passage 15. And it is removed from the casting roll 12 by the cooling water W flowing through the longitudinal cooling passage 14. As the casting roll rotates, the metal S cooled by the outer peripheral surface of the casting roll 12 forms a strip S that moves downward in the gap between the rolls.
上記したように、長手方向冷却通路14は鋳造ロール12中央部17の半径方向延出端面間を延びる。端部28外面と中央部17外面との間の間隔T4を維持しつつ、長手方向冷却通路14と鋳造ロール12の外周面との間には小さな隙間T3が形成されるような構成になっている。 As described above, the longitudinal cooling passage 14 extends between the radially extending end surfaces of the central portion 17 of the casting roll 12. A small gap T3 is formed between the longitudinal cooling passage 14 and the outer peripheral surface of the casting roll 12 while maintaining the interval T4 between the outer surface of the end portion 28 and the outer surface of the central portion 17. Yes.
従って、使用時に、鋳造ロール12長手方向通路14を通る冷却水Wは鋳造ロール12外周面を効果的に冷却することができる。 Therefore, at the time of use, the cooling water W passing through the longitudinal direction passage 14 of the casting roll 12 can effectively cool the outer peripheral surface of the casting roll 12.
更に又、バッフル32が屈曲部に設けられていない図14及び図15に示した例と比べて、バッフル32は屈曲部の通路断面積をほぼ半分に減少させる。従って、冷却水Vの速度が増加され、更に又、冷却水Wは屈曲部の外隅に向けられるので鋳造ロール12端部がより有効に冷却されることになる。 Furthermore, compared with the example shown in FIGS. 14 and 15 in which the baffle 32 is not provided at the bent portion, the baffle 32 reduces the passage cross-sectional area of the bent portion to almost half. Therefore, the speed of the cooling water V is increased, and furthermore, since the cooling water W is directed to the outer corner of the bent portion, the end portion of the casting roll 12 is cooled more effectively.
両流れ方向でのバッフル32の有益な効果が図4及び図5の冷却水速度プロフィールで示されている。 The beneficial effect of baffle 32 in both flow directions is illustrated by the cooling water velocity profiles of FIGS.
従って、鋳造ロール12の冷却効果は上記した鋳造ロール12で高められるので、鋳造ロール12の回転数を増加させることが、即ち、鋳造速度を増やしてストリップSの生産効率を高めることが可能である。 Therefore, since the cooling effect of the casting roll 12 is enhanced by the casting roll 12 described above, it is possible to increase the number of rotations of the casting roll 12, that is, increase the casting speed and increase the production efficiency of the strip S. .
図6乃至図9は鋳造ロール12の第2実施例で構成される連続鋳造機を示し、図1〜図5と同じ構成部分は同じ参照符号で表してある。 6 to 9 show a continuous casting machine constituted by the second embodiment of the casting roll 12, and the same components as in FIGS. 1 to 5 are denoted by the same reference numerals.
この鋳造ロール12においては、長手方向冷却通路14に突出し、半径方向冷却通路15出口に跨った複数の一体形成したフィン33が上記したスペーサ31及びバッフル32の代わりに設けられる。従って、長手方向冷却通路14と半径方向冷却通路15との交差部で限定される屈曲部の通路断面積はほぼ半分に減少される。 In the casting roll 12, a plurality of integrally formed fins 33 projecting into the longitudinal cooling passage 14 and straddling the outlet of the radial cooling passage 15 are provided in place of the spacer 31 and the baffle 32 described above. Accordingly, the passage cross-sectional area of the bent portion defined by the intersection of the longitudinal cooling passage 14 and the radial cooling passage 15 is reduced to almost half.
複数のフィン33が、冷却水Wの流れを直接に妨げることのないよう鋳造ロール12内を周方向に配置され、フィンの先端が鋭角に形成され、屈曲部の内隅が長くされている。 A plurality of fins 33 are arranged in the circumferential direction in the casting roll 12 so as not to obstruct the flow of the cooling water W directly, the tips of the fins are formed at acute angles, and the inner corners of the bent portions are elongated.
斯かる鋳造ロールを用いる連続鋳造機では、溶融金属をサイド堰11と鋳造ロール12で画成される溜めに注ぎつつ、冷却水を長手方向冷却通路14と半径方向冷却通路15を介して流して鋳造ロール12から熱を抜き出す。 In a continuous casting machine using such a casting roll, while pouring molten metal into a reservoir defined by the side weir 11 and the casting roll 12, cooling water is allowed to flow through the longitudinal cooling passage 14 and the radial cooling passage 15. Heat is extracted from the casting roll 12.
長手方向冷却通路14は鋳造ロール12中央部17を半径方向延出端面間で延びる。端部28外面と中央部17外面との間の間隔T4を維持しつつ、長手方向冷却通路14と鋳造ロール12外周面との間には小さな間隙T3しかないような構成となっている。 The longitudinal cooling passage 14 extends through the center portion 17 of the casting roll 12 between the radially extending end faces. The structure is such that there is only a small gap T3 between the longitudinal cooling passage 14 and the outer peripheral surface of the casting roll 12 while maintaining the interval T4 between the outer surface of the end portion 28 and the outer surface of the central portion 17.
従って、冷却水Wは鋳造ロール12外周面近くを通り、鋳造ロール12のこれら表面を効率的に冷却する。 Accordingly, the cooling water W passes near the outer peripheral surface of the casting roll 12 and efficiently cools these surfaces of the casting roll 12.
更に又、屈曲部の通路断面積が図14及び図15に示したようなフィン33なしの場合と比べてほぼ半分に減少されるので冷却水Wの速度が増加し、更に又、鋳造ロール12が溶融金属から受けた熱はプラグ19及びフィン33を介して冷却水Wへと伝えられるので、その結果、鋳造ロール12が効率的に冷却される。 Furthermore, the passage cross-sectional area of the bent portion is reduced by almost half compared to the case without the fins 33 as shown in FIGS. 14 and 15, so that the speed of the cooling water W is increased. Since the heat received from the molten metal is transferred to the cooling water W through the plug 19 and the fins 33, the casting roll 12 is efficiently cooled as a result.
両流れ方向でのフィン33の有益な効果が図8及び図9の冷却水速度プロフィールにより示されている。 The beneficial effect of fins 33 in both flow directions is illustrated by the cooling water velocity profiles of FIGS.
従って、鋳造ロール12の冷却効果は上記した鋳造ロール12では高く、それ故、鋳造ロール12の回転速度を高めることが、即ち、鋳造速度を増加させてストリップSの生産効率を高めることが可能である。 Therefore, the cooling effect of the casting roll 12 is high in the above-described casting roll 12, and therefore, it is possible to increase the rotation speed of the casting roll 12, that is, to increase the production speed of the strip S by increasing the casting speed. is there.
図10乃至図13は鋳造ロールの第3の、但し残りの唯一可能な例ではない実施例を用いた連続鋳造機を示し、図1〜図5と同じ構成部分は同じ参照符号で表してある。 10 to 13 show a continuous casting machine using a third, but not the only possible example of a casting roll, the same components as in FIGS. 1 to 5 being denoted by the same reference numerals. .
この鋳造ロールは、隣接する長手方向冷却通路14同士を相互接続して、1つの長手方向冷却通路14の全長を通った冷却水Wの流が隣接の長手方向冷却通路14に入るのを助長する周方向冷却通路34を有している。 This casting roll interconnects adjacent longitudinal cooling passages 14 to help the flow of cooling water W through the entire length of one longitudinal cooling passage 14 enter the adjacent longitudinal cooling passages 14. A circumferential cooling passage 34 is provided.
周方向冷却通路34は鋳造ロール12の内側から外側に向けて開口を切削形成し、2つの長手方向冷却通路14を相互接続するよう開口を鋳造ロール12の回転軸線付近の位置でプラグ35によって塞ぐことにより形成される。 The circumferential cooling passage 34 is cut and formed from the inside to the outside of the casting roll 12, and the opening is closed by a plug 35 at a position near the rotation axis of the casting roll 12 so as to interconnect the two longitudinal cooling passages 14. Is formed.
更に又、インサート36が長手方向冷却通路14内に位置決めされて、通路断面積がほぼ半分に減少される。インサート36の先端は鋭角に形成され、鋳造ロール12の回転軸線に沿って細長である。 Furthermore, the insert 36 is positioned in the longitudinal cooling passage 14 and the passage cross-sectional area is reduced by almost half. The tip of the insert 36 is formed at an acute angle and is elongated along the rotation axis of the casting roll 12.
上記した鋳造ロール12を用いる連続鋳造機において、溶融金属をサイド堰11とロール本体12とにより形成される空間に注ぎつつ冷却水Wを長手方向冷却通路14と半径方向冷却通路15に流すことにより熱が鋳造ロール12から抜き出される。 In the continuous casting machine using the casting roll 12 described above, by flowing the cooling water W through the longitudinal cooling passage 14 and the radial cooling passage 15 while pouring molten metal into the space formed by the side weir 11 and the roll body 12. Heat is extracted from the casting roll 12.
鋳造ロール12外径が延ばされサイド堰11に当接される位置の一方の半径方向延出端面から、鋳造ロール12外径が延ばされサイド堰11に当接される他方の半径方向延出端面へと、長手方向冷却通路14が延びる。従って、サイド堰11と鋳造ロール12の大外径で半径方向延出端面との接触部T4が大きいまま、長手方向冷却通路14と鋳造ロール12外周面との間の距離T3を最大限に減少できる。 From the radially extending end surface of the position where the outer diameter of the casting roll 12 is extended and is in contact with the side weir 11, the other radial extension of the outer diameter of the casting roll 12 is extended and is in contact with the side weir 11. A longitudinal cooling passage 14 extends to the exit end face. Therefore, the distance T3 between the longitudinal cooling passage 14 and the outer peripheral surface of the casting roll 12 is reduced to the maximum while the contact portion T4 between the side weir 11 and the casting roll 12 with the large outer diameter and the radially extending end surface remains large. it can.
従って、冷却水Wが鋳造ロール12の表面層を通り、鋳造ロール12の外周面を効率的に冷却する。 Therefore, the cooling water W passes through the surface layer of the casting roll 12 and efficiently cools the outer peripheral surface of the casting roll 12.
更に又、屈曲部の通路断面積がほぼ半分に減少されるので冷却水Wの速度が増加し、又、冷却水Wが屈曲部内を鋳造ロール12外周面付近に向かわされるので鋳造ロール12が効果的に冷却される。 Furthermore, since the passage cross-sectional area of the bent portion is reduced to almost half, the speed of the cooling water W increases, and the cooling water W is directed toward the outer peripheral surface of the casting roll 12 in the bent portion, so that the casting roll 12 Effectively cooled.
一流れ方向でのインサート36の有益な効果が図13の冷却水速度プロフィールにより示されている。 The beneficial effect of the insert 36 in one flow direction is illustrated by the cooling water velocity profile of FIG.
従って、上記した鋳造ロールは、鋳造ロール12の冷却効果が高められるので鋳造ロール12の回転速度を高めることができ、即ち、鋳造速度を増加させてストリップSの製造効率を高めることができる。 Therefore, since the above-mentioned casting roll can enhance the cooling effect of the casting roll 12, the rotational speed of the casting roll 12 can be increased, that is, the production speed of the strip S can be increased by increasing the casting speed.
勿論、ここで想定した鋳造ロールは上記した実施様式に限定されるものではなく、本発明の要旨の範囲内で種々の改変が可能である。 Of course, the casting roll assumed here is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.
ここで想定した鋳造ロールは、鋼及びその他様々の金属の連続鋳造に用いることができる。 The casting roll assumed here can be used for continuous casting of steel and various other metals.
Claims (11)
(b)鋳造ロール間のロール間隙上方に溶融金属を送給して、ロール間隙直上で鋳造ロール上に支持された溶融金属の鋳造溜めを形成する溶融金属供給システムとからなり、
前記流れ制御部材が、半径方向延出端面から長手方向冷却通路の方向に延びる複数のフィンで構成される
金属ストリップ鋳造装置。(A) Each casting roll is constituted by a cylindrical body having a central portion and a plurality of cooling passages extending through the central portion, the cooling passage is constituted by a longitudinal cooling passage, and further flows through the cooling passage. A roll gap is formed between at least one bent portion in the cooling passage that causes the cooling fluid to change its direction and a flow control member that is positioned in the bent portion and controls the flow of the cooling fluid before and after the bent portion. Forming a pair of laterally positioned casting rolls;
(B) to deliver molten metal into the nip above between the casting rolls, Ri Do from the molten metal supply system to form a casting pool of molten metal supported on the casting rolls immediately above the nip,
The metal strip casting apparatus , wherein the flow control member is composed of a plurality of fins extending in the direction of the longitudinal cooling passage from the radially extending end face .
(b)長手方向冷却通路から成り、更には、冷却通路を流れる冷却流体に方向転換を受けさせる冷却通路内の少なくとも1つの屈曲部と、屈曲部内に位置決めされて屈曲部前後の冷却流体の流れを制御する流れ制御部材とから成る、中央部内を延びる複数の冷却通路とで構成され、
前記流れ制御部材が、半径方向延出端面から長手方向冷却通路の方向に延びる複数のフィンで構成される
鋳造ロール。(A) a cylindrical body having a central portion;
(B) a longitudinal cooling passage, and further, at least one bent portion in the cooling passage that causes the cooling fluid flowing through the cooling passage to change direction, and a flow of the cooling fluid before and after the bent portion positioned in the bent portion. comprising a flow control member that controls, it is composed of a plurality of cooling passages extending central portion,
The casting roll , wherein the flow control member is composed of a plurality of fins extending in the direction of the longitudinal cooling passage from the radially extending end face .
(b)金属供給システムを介し鋳造ロール間のロール間隙上方に溶融金属を送給して、鋳造ロール間のロール間隙直上に鋳造ロール上に支持された溶融金属の鋳造溜めを形成し、
(c)鋳造ロールを相互方向に回転させて、鋳造溜めから鋳造ロールの円筒形表面上に殻を形成して鋳造ロール間のロール間隙から下方に送給される薄鋳造ストリップを形成する、
という諸段階からなる薄金属ストリップ連続鋳造方法。(a) A cylindrical body having a central portion and a longitudinal cooling passage, and further, at least one bent portion in the cooling passage for causing the cooling fluid flowing in the cooling passage to change direction, and positioning in the bent portion A plurality of cooling passages extending in the central portion, each comprising a flow control member for controlling the flow of cooling fluid before and after the bent portion by a plurality of fins extending in the direction of the longitudinal cooling passage from the radially extending end face. Assembling a pair of laterally positioned casting rolls configured and forming a roll gap therebetween,
(b) Feeding the molten metal above the roll gap between the casting rolls through the metal supply system to form a casting reservoir of the molten metal supported on the casting roll directly above the roll gap between the casting rolls,
(c) rotating the casting rolls in opposite directions to form a shell from the casting pool on the cylindrical surface of the casting roll to form a thin cast strip fed downward from the roll gap between the casting rolls;
Thin metal strip continuous casting method consisting of various stages.
(b)鋳造ロール間のロール間隙上方に溶融金属を供給して、半径方向延出端面に隣接位置決めされたサイド堰により画成される、ロール間隙直上で鋳造ロール上に支持された溶融金属の鋳造溜めを形成する溶融金属供給システム
とで構成される、金属ストリップ鋳造装置。(a) Each casting roll can support the central portion and the side weir, and includes a cylindrical body having a radially extending end surface at each end of the central portion, and a cooling passage extending between the radially extending end surfaces in the central portion. Each of the cooling passages comprises a longitudinal cooling passage, and further includes at least one bent portion that causes the cooling fluid flowing in the cooling passage to undergo a change of direction, and is positioned in the bent portion from the radially extending end surface. A pair of laterally positioned casting rolls forming a roll gap therebetween, comprising a flow control member for controlling the flow of the cooling fluid before and after the bent portion by a plurality of fins extending in the direction of the longitudinal cooling passage ;
(b) The molten metal is supplied above the roll gap between the casting rolls and is defined by the side weir positioned adjacent to the radially extending end face, and the molten metal supported on the casting roll immediately above the roll gap. A metal strip casting apparatus comprising a molten metal supply system for forming a casting pool.
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JP2005331426A JP2007136485A (en) | 2005-11-16 | 2005-11-16 | Roll for casting |
PCT/AU2006/001706 WO2007056801A1 (en) | 2005-11-16 | 2006-11-16 | Twin roll caster, and equipment and method for operating the same |
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JP5091871B2 true JP5091871B2 (en) | 2012-12-05 |
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JP2008540406A Expired - Fee Related JP5091871B2 (en) | 2005-11-16 | 2006-11-16 | Twin roll casting machine, its operating equipment and operating method |
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JP (2) | JP2007136485A (en) |
KR (1) | KR101377090B1 (en) |
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US7690417B2 (en) | 2001-09-14 | 2010-04-06 | Nucor Corporation | Thin cast strip with controlled manganese and low oxygen levels and method for making same |
JP4686288B2 (en) | 2005-07-25 | 2011-05-25 | キャストリップ・リミテッド・ライアビリティ・カンパニー | Casting roll |
US7926550B2 (en) | 2007-01-19 | 2011-04-19 | Nucor Corporation | Casting delivery nozzle with insert |
US7926549B2 (en) * | 2007-01-19 | 2011-04-19 | Nucor Corporation | Delivery nozzle with more uniform flow and method of continuous casting by use thereof |
JP5103939B2 (en) * | 2007-02-26 | 2012-12-19 | 株式会社Ihi | Casting roll |
US8047264B2 (en) | 2009-03-13 | 2011-11-01 | Nucor Corporation | Casting delivery nozzle |
KR101089313B1 (en) | 2009-07-27 | 2011-12-02 | 주식회사 포스코 | Casting roll in twin roll typed strip casting |
KR101940866B1 (en) | 2016-12-12 | 2019-04-10 | 주식회사 포스코 | Casting roll and apparatus for strip casting having the same |
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US4842040A (en) * | 1988-08-10 | 1989-06-27 | Battelle Development Corporation | Uniform cooling of cast strip |
JP2734487B2 (en) * | 1990-10-01 | 1998-03-30 | 三菱重工業株式会社 | Cooling drum for continuous casting |
GB9100151D0 (en) * | 1991-01-04 | 1991-02-20 | Davy Distington Ltd | Strip caster roll |
FR2672523B1 (en) | 1991-02-13 | 1995-04-21 | Usinor Sacilor | CONTINUOUS CASTING CYLINDER FUEL. |
GB9123666D0 (en) * | 1991-11-07 | 1992-01-02 | British Steel Plc | Cooling of rollers |
AUPN053695A0 (en) | 1995-01-13 | 1995-02-09 | Bhp Steel (Jla) Pty Limited | Casting roll |
JPH08267192A (en) * | 1995-03-31 | 1996-10-15 | Hitachi Zosen Corp | Mold roll for twin roll type strip continuous casting and production thereof |
AUPO188696A0 (en) * | 1996-08-27 | 1996-09-19 | Bhp Steel (Jla) Pty Limited | Twin roll casting |
AUPO832897A0 (en) * | 1997-07-30 | 1997-08-28 | Bhp Steel (Jla) Pty Limited | Twin roll casting |
AUPP331698A0 (en) * | 1998-05-04 | 1998-05-28 | Bhp Steel (Jla) Pty Limited | Casting steel strip |
JP4686288B2 (en) | 2005-07-25 | 2011-05-25 | キャストリップ・リミテッド・ライアビリティ・カンパニー | Casting roll |
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2005
- 2005-11-16 JP JP2005331426A patent/JP2007136485A/en active Pending
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CN101351284A (en) | 2009-01-21 |
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