JPH05177311A - Method for controlling biting rate of brush for strip continuous caster and device therefor - Google Patents
Method for controlling biting rate of brush for strip continuous caster and device thereforInfo
- Publication number
- JPH05177311A JPH05177311A JP34642091A JP34642091A JPH05177311A JP H05177311 A JPH05177311 A JP H05177311A JP 34642091 A JP34642091 A JP 34642091A JP 34642091 A JP34642091 A JP 34642091A JP H05177311 A JPH05177311 A JP H05177311A
- Authority
- JP
- Japan
- Prior art keywords
- brush roll
- brush
- peripheral surface
- cooling drum
- current value
- 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
(57)【要約】
【目的】 本発明は薄板を連続鋳造するに際し、ブラシ
ロールの冷却ドラムへのブシ喰込み量を適正値に保持す
ることを目的とする。
【構成】 ブラシロールを回転するモーターのブラシ電
流を検出し、この電流値が設定した電流値になるように
ブラシ喰込み量を調整する。
【効果】 鋳造期間中適正なブラッシングを行うことが
できるので鋳片表面に汚れムラがなく、表面割れのない
健全な鋳片を得ることができる。
(57) [Summary] [Object] The present invention has an object to maintain an appropriate amount of bushing into a cooling drum of a brush roll when continuously casting a thin plate. [Structure] The brush current of the motor that rotates the brush roll is detected, and the brush digging amount is adjusted so that this current value becomes the set current value. [Effect] Since proper brushing can be performed during the casting period, it is possible to obtain a sound slab with no stain unevenness on the surface of the slab and no surface cracks.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば双ドラム方式
のように、冷却ドラム等の移動鋳型の周面の一部に湯溜
り部を形成し、そこに注入された溶融金属を冷却、凝固
させて薄肉鋳片を製造する連続鋳造技術に関し、特に、
前記移動鋳型の表面に圧接するブラシロールに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a molten metal pool on a part of the peripheral surface of a moving mold such as a cooling drum, such as a twin drum system, and cools and solidifies the molten metal injected therein. With regard to the continuous casting technology for producing thin cast pieces,
The present invention relates to a brush roll that is pressed against the surface of the moving mold.
【０００２】[0002]
【従来の技術】最近、溶鋼等の溶融金属から１mmないし
１０mm程度の肉厚をもつ薄肉鋳片を連続鋳造機によって
直接製造する方法が注目されている。この連続鋳造法に
よれば、従来のように厚肉のスラブから多段階の熱延工
程を経て薄板を製造する必要がなくなり、鋳片を最終の
厚さに成形する冷延も軽度のもので済む場合もあり、工
程や設備の簡略化によって大きな経済的効果が得られ、
金属の組織の面からみても好ましい場合が多い。2. Description of the Related Art Recently, attention has been focused on a method for directly producing a thin cast piece having a wall thickness of about 1 mm to 10 mm from a molten metal such as molten steel by a continuous casting machine. According to this continuous casting method, it is not necessary to manufacture a thin plate from a thick slab through a multi-step hot rolling process as in the past, and cold rolling for molding a slab to the final thickness is also mild. In some cases, it is possible to obtain a great economic effect by simplifying the process and equipment,
It is often preferable from the viewpoint of the metal structure.
【０００３】この種の連続鋳造法としては、互いに逆方
向に回転する一対の冷却ドラムの間に湯溜り部を形成す
る双ドラム方式、冷却ドラムとベルトとの間に湯溜り部
を形成するドラム−ベルト方式、１個の冷却ドラムを用
いる単ドラム方式等がある。これらの方式においては、
いずれも湯溜り部の溶融金属が冷却ドラムの表面に接触
する部分で冷却されて表皮から凝固しはじめ、凝固シエ
ルを形成しつつ厚さの中心に向って次第に凝固が進行し
て行く。そのため、冷却ドラムの表面に溶融金属の酸化
物等が部分的に付着していると、付着物の厚さに応じて
薄肉鋳片の表面にくぼみが残る（転写される）ばかりで
なく、付着物のある部分とそれがない部分とでは熱の伝
導率が異なるから、鋳片の面上での冷却の進行が不均一
となり、それらが原因となって鋳片の厚さが不均一とな
ったり、場合によっては、しわや割れを生じることがあ
る。As a continuous casting method of this kind, a twin drum system is used in which a hot water pool is formed between a pair of cooling drums rotating in opposite directions, and a drum is formed in which a hot water pool is formed between a cooling drum and a belt. -Belt method, single drum method using one cooling drum, and the like. In these schemes,
In each case, the molten metal in the molten metal pool is cooled at the portion in contact with the surface of the cooling drum and begins to solidify from the skin, and solidification gradually progresses toward the center of the thickness while forming a solidification shell. For this reason, if molten metal oxides, etc. partially adhere to the surface of the cooling drum, not only do dents (transfer) occur on the surface of the thin cast piece depending on the thickness of the adhered matter, but also Since the heat conductivity differs between the part with the kimono and the part without it, the progress of cooling on the surface of the slab becomes uneven, which causes uneven thickness of the slab. Or, in some cases, wrinkles or cracks may occur.
【０００４】そこで、冷却ドラムの表面の付着物をブラ
シロールによってかき落とすことが考えられ、特開昭６
０−１８４４４９号公報や特開昭６２−１７６６５０号
公報に記載された発明などが提案されている。Therefore, it is conceivable to scrape off the deposits on the surface of the cooling drum with a brush roll.
The inventions described in JP-A No. 0-184449 and JP-A No. 62-176650 have been proposed.
【０００５】[0005]
【発明が解決しようとする課題】従来技術によるブラシ
ロールは、適当な圧力で押付けて冷却ドラムの表面の付
着物をかき落とすことを目的として設けられているが、
かならずしも鋳片の割れなどを確実に防止することがで
きるとは限らず、むしろ、ブラシロールによるかき落し
が完全に行なわれないで筋目状に残った付着物による鋳
片の縦割れや、ブラシロールの偏心などによって冷却ド
ラムの表面に軸方向の帯のように残った付着物により鋳
片上に現われる周期的なしわや横割れなどの欠陥を生じ
ること、及びブラシロールにより冷却ドラム表面のメッ
キ層に摩耗や損傷、更にそれによる鋳片表面の欠陥など
を生じること等が、ブラシロールシステムの新たな問題
点となって来ている。The brush roll according to the prior art is provided for the purpose of pressing with a proper pressure to scrape off the deposits on the surface of the cooling drum.
It is not always possible to reliably prevent cracks in the slab, but rather, vertical scraping of the slab due to deposits left in a streak shape without being completely scraped off by the brush roll and brush roll Due to eccentricity, etc., deposits left on the surface of the cooling drum like a band in the axial direction cause defects such as periodic wrinkles and lateral cracks appearing on the slab, and the brush roll causes the plating layer on the surface of the cooling drum. A new problem of the brush roll system has been wear and damage, and the resulting defects on the surface of the slab.
【０００６】以上の問題点はブラシロールの冷却ドラム
への喰込み量（冷却ドラム表面に接触するブラシロール
の毛先と該ブラシロール中心軸との間の距離をｘとし、
ブラシロールを冷却ドラムの表面に圧接したときの冷却
ドラム表面とブラシロール軸との間の距離をｙとしたと
き、ｘ−ｙを喰込み量とする）が適正でないことが大き
な原因である。The above-mentioned problems are caused by the amount of biting of the brush roll into the cooling drum (the distance between the tip of the brush roll contacting the surface of the cooling drum and the center axis of the brush roll is x,
The major cause is that xy is an appropriate amount, where y is the distance between the surface of the cooling drum and the shaft of the brush roll when the brush roll is pressed against the surface of the cooling drum.
【０００７】即ち、押付け力が弱いとブラッシングが不
十分となり、又、押付け力が大き過ぎるとブラシの毛の
倒れ込みが生じて有効なブラッシングを行うことが出来
ない。そこでブラシ装置の剛性を高め、ブラシの位置を
ストッパー等にて固定することによって適正なブラッシ
ングを行うことが考えられる。しかし、この方法では鋳
造が進み、ブラシロールの使用回数が増えてくると毛の
倒れ込みが発生してきて、ブラシロール毛先と該ブラシ
ロール中心軸との間の距離ｘが減少し、ブラシの適正な
喰込み量を保てず、ブラッシング不良に到る。That is, if the pressing force is weak, the brushing becomes insufficient, and if the pressing force is too large, the bristles of the brush collapse and the effective brushing cannot be performed. Therefore, it is possible to increase the rigidity of the brush device and fix the brush position with a stopper or the like to perform proper brushing. However, in this method, when the casting progresses and the number of times the brush roll is used increases, the bristles collapse, and the distance x between the tip of the brush roll and the center axis of the brush roll decreases, so that the appropriateness of the brush is reduced. The amount of bite cannot be maintained, resulting in defective brushing.
【０００８】現状では毛先の位置の厳密な制御は不可能
であり、この位置制御が仮にできたとしても、毛先の状
態、倒れ込みの程度（角度）によって、適正な喰込み量
自体が変化し、この毛先の状態を制御することは極めて
難かしい。本発明が解決しようとする課題は、ブラシロ
ールシステムが抱えているこれらの問題点を解消し、欠
陥のない薄肉鋳片を効率よく生産することができるよう
に改善することである。At present, it is impossible to strictly control the position of the hair tip, and even if this position control can be performed, the proper biting amount itself changes depending on the condition of the hair tip and the degree of collapse (angle). However, it is extremely difficult to control the condition of the hair tips. The problem to be solved by the present invention is to solve these problems of the brush roll system and to improve the production of defect-free thin-walled cast pieces efficiently.
【０００９】[0009]
【課題を解決するための手段】本発明者らは上記課題を
解決するために種々検討した結果、ブラシロールの適正
な喰込み量を鋳造期間中継続して維持するには、ブラシ
ロール駆動モーターの電流を検出し、この電流値を一定
に保つように制御することが最適であることを確認し
た。As a result of various studies for solving the above-mentioned problems, the present inventors have found that in order to maintain an appropriate bite amount of the brush roll continuously during the casting period, a brush roll drive motor is used. It was confirmed that it is optimal to detect the current of and to control so that this current value is kept constant.
【００１０】即ち、本発明は冷却ドラム周面に圧接して
いるブラシロールを回転せしめるブラシロール駆動モー
タの電流を検出し、ブラシロールの最適喰込み量に相当
する電流値をあらかじめ設定しておいて、この範囲の電
流値になるように、ブラシロールを圧接するステッピン
グシリンダーの駆動を調節してブラシロールの喰込み量
を適正な範囲に維持することを特徴とするものである。That is, according to the present invention, the current of the brush roll drive motor for rotating the brush roll pressed against the peripheral surface of the cooling drum is detected, and the current value corresponding to the optimum biting amount of the brush roll is set in advance. In addition, the drive amount of the stepping cylinder that presses the brush roll is adjusted so that the current value falls within this range, and the biting amount of the brush roll is maintained in an appropriate range.
【００１１】又、上記電流値を検出するかわりに、ブラ
シロールの回転軸の軸トルクを検出して上記と同様の手
段でステッピングシリンダーの駆動を調節しても同等の
効果が得られることが判明した。以下本発明をブラシロ
ール駆動モーター電流を検出値とした場合について詳細
に説明する。Further, instead of detecting the current value, it is found that the same effect can be obtained by detecting the axial torque of the rotating shaft of the brush roll and adjusting the driving of the stepping cylinder by the same means as above. did. Hereinafter, the present invention will be described in detail when the brush roll drive motor current is used as a detection value.
【００１２】[0012]
【作用】先ず、本発明のブラシロール駆動モーター電流
とブラシロール喰込み量との関係を図２に基づいて説明
する。図において、縦軸はブラシロール駆動モーター電
流値を示し、横軸はブラシロールの喰込み量を示す。ブ
ラシロールが空運転の場合はモーター電流値Ａでブラシ
ロールを回転駆動するが、この時のブラシロールの喰込
み量は零である。この位置よりブラシロールを徐々に冷
却ドラムへ圧接せしめ、ブラシロールの毛先を冷却ドラ
ム周面に喰込ませる。モーター電流もブラシロールの圧
接力の増大により徐々に上昇し、ブラシロールが適正喰
込み量になる軸位置ａに相当する電流適正値Ｂａに到達
する。電流値（Ｂａ−Ａ）がドラム表面（汚れを含む）
とブラシ間の摩擦力に対応する仕事に相当し、その値
は、汚れ除去能力の関数である。汚れ除去能力を一定に
保つには電流値（Ｂａ−Ａ）を一定に保つことが必要で
ある。そこで、この電流値Ｂａを維持するようにブラシ
軸の位置を一定にしてブラシロールを作業させるが、長
時間の使用によりブラシロールの毛先が倒れ込み、モー
ター電流が降下し、適正値よりはずれる。その電流値を
検出し、電流値を適正範囲に入るようブラシ軸位置をず
らし喰込み量を増加する。First, the relationship between the brush roll drive motor current and the brush roll biting amount of the present invention will be described with reference to FIG. In the figure, the vertical axis represents the brush roll drive motor current value, and the horizontal axis represents the brush roll biting amount. When the brush roll is idle, the brush roll is rotationally driven by the motor current value A, but the biting amount of the brush roll at this time is zero. From this position, the brush roll is gradually brought into pressure contact with the cooling drum, and the bristle tips of the brush roll are bited into the peripheral surface of the cooling drum. The motor current also gradually rises due to the increase in the pressure contact force of the brush roll, and reaches the current proper value Ba corresponding to the shaft position a where the brush roll has a proper biting amount. Current value (Ba-A) is drum surface (including dirt)
It corresponds to the work corresponding to the frictional force between the brush and the brush, the value of which is a function of the dirt removal capacity. In order to keep the dirt removing ability constant, it is necessary to keep the current value (Ba-A) constant. Therefore, the brush roll is made to work with the position of the brush shaft kept constant so as to maintain this current value Ba, but the brush roll tip falls down due to long-term use, and the motor current drops, deviating from the proper value. The current value is detected, and the brush shaft position is shifted so that the current value falls within an appropriate range to increase the bite amount.
【００１３】即ち、線（Ｉ）（作業開始時）が線（II）
（作業終了時）の方向へ移動する状態となり、線（II）
に到達すると、即ちモーター電流がＢａ′迄降下する
と、ブラシロールをドラム側へｂまで接近させ、これに
よりモーター電流をＢｂに上昇せしめ、作業を継続す
る。更にブラシロールの毛先がこれ以上倒れ込んで、モ
ーター電流がＢｂ′（限界ライン（III)）以下まで降下
すると、これ以上、ブラシロールをドラム側へ接近させ
てＢａの電流を確保しても毛先とドラム表面との接触角
度が小さ過ぎて、汚れ除去能率が著しく低下する。そこ
でこれ以上のブラシ作業を続けることができず、ここで
ブラシロールを交換することになる。That is, the line (I) (at the start of work) is the line (II)
It will move in the direction of (at the end of work) and the line (II)
When, i.e., when the motor current drops to Ba ', the brush roll is brought closer to the drum side to b, thereby increasing the motor current to Bb and continuing the work. When the tip of the brush roll further collapses and the motor current drops below Bb '(limit line (III)), even if the brush roll is moved closer to the drum side and the current of Ba is secured, the bristles are kept. The contact angle between the tip and the drum surface is too small, and the dirt removal efficiency is significantly reduced. Therefore, the brush work cannot be continued any more, and the brush roll is replaced here.
【００１４】このようにモーター電流を適正範囲に制御
すると、長時間安定したドラムブラッシング作業を行う
ことができる。By controlling the motor current in the proper range in this manner, stable drum brushing work can be performed for a long time.
【００１５】[0015]
【実施例】次に本発明を双ドラム方式において実施した
例を具体的に説明する。図１は上記方式の連続鋳造機の
要部を示す。１及び２は移動鋳型の例としての冷却ドラ
ムで、直径１，０００mm、軸方向長さ８００mmの寸法を
有する。両者は薄肉鋳片の厚さを決定する数mm程度の間
隔を保って図示しない軸受上に支持され、且つ周速２０
〜１３０ｍ／min の速さで、矢印のように互いに逆向き
に回転駆動される。３及び４は冷却ドラム１，２の両端
面に接して設けられるサイド堰で、これらによって冷却
ドラム１，２の間隔の上部には、溶鋼が注入される湯溜
り部５が形成される。６は連続鋳造によって得られる薄
肉鋳鋼片である。冷却ドラム１及び２は、図示しない配
管等によって冷却水の供給を受け、その表面が軸方向に
均一の温度となるように冷却される。EXAMPLES Next, an example in which the present invention is carried out in a twin drum system will be specifically described. FIG. 1 shows a main part of the above continuous casting machine. Cooling drums 1 and 2 are examples of a moving mold, and have a diameter of 1,000 mm and an axial length of 800 mm. Both are supported on a bearing (not shown) with an interval of about several mm that determines the thickness of the thin cast piece, and a peripheral speed of 20
At a speed of ~ 130 m / min, they are rotationally driven in opposite directions as indicated by arrows. Reference numerals 3 and 4 denote side dams provided in contact with both end surfaces of the cooling drums 1 and 2, and by these, a molten metal pool 5 into which molten steel is poured is formed above the cooling drums 1 and 2. 6 is a thin cast steel slab obtained by continuous casting. The cooling drums 1 and 2 are supplied with cooling water through unillustrated pipes and the like, and are cooled so that the surfaces thereof have a uniform temperature in the axial direction.
【００１６】７及び８は冷却ドラム１及び２の背後にお
いてそれらの表面に圧接して回転するブラシロールで、
長さは８００mm、直径は１５０mmとする。それらの回転
軸９及び１０のそれぞれは、ブラシロールの基台１１，
１２上で支点軸１３により枢着され相互に連結された各
一対の腕１４，１４によって、円弧動することができる
ように支持されている。腕１４の各対を連結する横杆１
５には、基台１１，１２上に一端を支持されたステッピ
ングシリンダー１６，１７のロッドの各先端が係合し、
ブラシロール軸位置（喰込み量）の微調整を行う。基台
１１，１２上には更にブラシロール７，８を回転駆動す
るモーター２５が載置されている。Brush rolls 7 and 8 rotate behind the cooling drums 1 and 2 in pressure contact with their surfaces.
The length is 800 mm and the diameter is 150 mm. Each of the rotating shafts 9 and 10 has a base 11 of a brush roll,
A pair of arms 14, 14 pivotally attached to each other by a fulcrum shaft 13 and connected to each other are supported so as to be able to move in an arc. Horizontal rod 1 connecting each pair of arms 14
5, the tips of the rods of the stepping cylinders 16 and 17 supported at one end on the bases 11 and 12 are engaged,
Finely adjust the brush roll shaft position (bite amount). A motor 25 for rotating the brush rolls 7 and 8 is further mounted on the bases 11 and 12.
【００１７】ブラシロール７，８の駆動はブラシロール
７，８の軸９，１０に取付けられたプーリ２２と支点軸
１３に対して遊転する複合プーリ２３との間にベルト２
４を掛け、更にモータ２５の回転軸に取付けられたプー
リ２６と前記複合プーリ２３との間にベルト２７を掛け
て構成した伝動装置によって行なわれている。基台１
１，１２はエアシリンダー２７，３３によりガイド枠２
８，２８に案内されて往復動するように構成されてい
る。The brush rolls 7 and 8 are driven by a belt 2 between a pulley 22 mounted on the shafts 9 and 10 of the brush rolls 7 and 8 and a composite pulley 23 that freely rotates with respect to the fulcrum shaft 13.
4 is further applied, and a belt 27 is applied between the pulley 26 attached to the rotary shaft of the motor 25 and the composite pulley 23. Base 1
1 and 12 are guide frames 2 by air cylinders 27 and 33.
It is configured to reciprocate by being guided by 8, 28.
【００１８】次に本発明の制御系について説明する。ブ
ラシロール駆動モーター２５には該モーターの回転電流
値を検出する検出器３０が設けられ、検出された電流値
は制御装置２９に入力される。制御装置２９にはブラシ
ロールの適正喰込み量に相当する適正電流値が設定され
ており、鋳造前にこのブラシ電流値が得られるようにあ
らかじめブラシロールを位置決め即ち、適正の喰込み量
を与えておく。ドラムブラッシングの開始後、ブラシ電
流値が適正範囲からはずれると、制御装置２９からステ
ッピングシリンダー１６へ駆動指令が出力され、この信
号によって上記ステッピングシリンダーの駆動機構３１
が作動し、ブラシロール７，８の位置が微調整される。Next, the control system of the present invention will be described. The brush roll drive motor 25 is provided with a detector 30 that detects a rotation current value of the motor, and the detected current value is input to the control device 29. An appropriate current value corresponding to the appropriate biting amount of the brush roll is set in the controller 29, and the brush roll is positioned in advance so that the brush current value is obtained before casting, that is, an appropriate biting amount is given. Keep it. When the brush current value deviates from the proper range after the drum brushing is started, a drive command is output from the controller 29 to the stepping cylinder 16, and this signal causes the drive mechanism 31 of the stepping cylinder to be driven.
Is operated, and the positions of the brush rolls 7 and 8 are finely adjusted.
【００１９】なお、他の実施例として、図中３２で示す
トルク検出器でブラシロール軸トルクを検出し、該検出
トルクを制御装置２９に入力して、最適トルク値になる
ように上記と同様の手段によってステッピングシリンダ
ーを微調整する。以上により、ブラシロールの喰込み量
が適正値に維持されて安定したドラムブラッシングが行
われ、その結果表面割れのない健全な鋳片が得られる。As another embodiment, the torque detector indicated by 32 in the figure detects the brush roll shaft torque, inputs the detected torque to the control device 29, and performs the same operation as above so as to obtain the optimum torque value. Fine tune the stepping cylinder by the means. As described above, the amount of bite of the brush roll is maintained at an appropriate value, stable drum brushing is performed, and as a result, a sound slab without surface cracks can be obtained.
【００２０】[0020]
【実施例１】図１に示す装置で、冷却ドラム回転速度を
４０ｍ／分にして鋳造を行い、その間にブラシロール
７，８をステッピングシリンダー１６，１７で冷却ドラ
ム周面に押付け、回転数６００rpm を与えつゝブラッシ
ングを行った。鋳造前に制御装置２９には最適なモータ
ー回転電流値（ブラシ電流値）として、１１（ブラシ空
転時の電流）＋α(A) が記憶されており、これに相当す
る喰込み量になる位置にあらかじめブラシロールを設定
した。[Embodiment 1] With the apparatus shown in FIG. 1, casting was carried out at a cooling drum rotation speed of 40 m / min, while brush rolls 7 and 8 were pressed against the peripheral surface of the cooling drum by stepping cylinders 16 and 17, and the rotation speed was 600 rpm. Was given and brushed. Before casting, the control device 29 stores 11 (current during brush idling) + α (A) as the optimum motor rotation current value (brush current value), and the optimum amount of rotation current is stored at a position corresponding to this amount. The brush roll was set in advance.
【００２１】この実施例では直径０．１５mm、長さ４０
mmの硬線を用いた円筒型ブラシを使用したので、上記α
は２〜４(A) の範囲であった。鋳造開始と同時にブラシ
電流を１００ｍ／秒周期でサンプリングし、１０点の移
動平均値が目標値の±１(A) を外れた場合にブラシロー
ルの位置を微調整した。すなわち、鋳造中、ブラシ電流
検出器３０によってブラシ電流を検出し、この検出値が
常に最適電流値１１＋３＝１４(A) になるように、制御
装置２９からステッピングシリンダー１６の駆動機構３
１へ信号を発した。すなわち、ブラシ電流が１５(A) を
上回った場合、１００μｍ／秒の速度でブラシロールを
冷却ドラムから後退せしめて１４(A) になったとき停止
し、またブラシ電流が１３(A) を下回った場合、同様の
速度でブラシロールを冷却ドラムに接近させ、１４(A)
になったとき停止した。上記鋳造の状態を図３（ａ）に
示す。かかる操作によりブラシ電流を鋳造時間６０分に
亘り確実に１４±１(A) 以内に制御することができた。In this embodiment, the diameter is 0.15 mm and the length is 40.
Since a cylindrical brush with a hard wire of mm was used,
Was in the range of 2 to 4 (A) . Simultaneously with the start of casting, the brush current was sampled at a cycle of 100 m / sec, and the position of the brush roll was finely adjusted when the moving average value at 10 points deviated from the target value ± 1 (A) . That is, the brush current is detected by the brush current detector 30 during casting, and the drive mechanism 3 for the stepping cylinder 16 is controlled by the controller 29 so that the detected value is always the optimum current value 11 + 3 = 14 (A).
Signaled to 1. That is, when the brush current exceeds 15 (A) , the brush roll is retracted from the cooling drum at a speed of 100 μm / sec and stops when it reaches 14 (A) , and the brush current falls below 13 (A) . If the brush roll comes close to the cooling drum at the same speed, 14 (A)
It stopped when it became. The state of the above casting is shown in FIG. By this operation, the brush current could be reliably controlled within 14 ± 1 (A) over the casting time of 60 minutes.
【００２２】これにより鋳造末期まで、冷却ドラムの汚
れムラの増加は起らなかった。As a result, no increase in stain unevenness of the cooling drum occurred until the end of casting.
【００２３】[0023]
【比較例】機械的なストッパーによりブラシロールのブ
ラシ喰込み量を１．５mmにプリセット（初期セット）
し、他は実施例と同じ仕様でブラッシングを実施した。
鋳造時間とブラシ電流値との関係を第３図（ｂ）に示
す。ブラッシング開始２０分後からブラシ電流が低下し
始めると同時に、汚れムラが増加した。従って、上記時
間経過後ブラシロールの毛先きが倒れ込み、ブラッシン
グが十分行われなかったことが確認された。[Comparative Example] Preset the brush biting amount of the brush roll to 1.5 mm by the mechanical stopper (initial setting)
However, other than that, the brushing was carried out with the same specifications as the embodiment.
The relationship between the casting time and the brush current value is shown in FIG. 3 (b). 20 minutes after the start of brushing, the brush current started to decrease, and at the same time, the stain unevenness increased. Therefore, it was confirmed that the brush tips of the brush rolls collapsed after the above-described time had elapsed, and the brushing was not sufficiently performed.
【００２４】[0024]
【発明の効果】本発明は前述した如く、鋳造中、常に適
正なブラシ喰込み量で冷却ドラムのブラッシングが可能
なので該冷却ドラムの汚れムラの発生を抑制することが
でき、その結果表面割れのない健全な鋳片が得られるの
で工業的効果は大きい。As described above, according to the present invention, it is possible to brush the cooling drum with a proper brush digging amount during casting, so that it is possible to suppress the generation of uneven stains on the cooling drum, and as a result, to prevent surface cracks. The industrial effect is great because a sound slab that does not sound can be obtained.
【図１】本発明の実施例を示す概略斜視図である。FIG. 1 is a schematic perspective view showing an embodiment of the present invention.
【図２】ブラシ駆動モーター電流とブラシの喰込み量と
の関係を示す図である。FIG. 2 is a diagram showing a relationship between a brush drive motor current and a brush biting amount.
【図３】ブラシ駆動モーター電流と鋳造時間との関係を
示す図であり、同図（ａ）は本発明例、同図（ｂ）は比
較例を示す。FIG. 3 is a diagram showing a relationship between a brush drive motor current and a casting time. FIG. 3A shows an example of the present invention, and FIG. 3B shows a comparative example.
１，２…冷却ドラム ３，４…サイド堰 ５…湯溜り部 ６…薄肉鋳片 ７，８…ブラシロール １３…支点軸 １４…腕 １６，１７…ステッピングシリンダー ２４，２７…ベルト ２５…モーター ２０，２３，２６…プーリー ２８…ガイド枠 ２９…制御装置 ３０…ブラシ電流値検出器 ３１…駆動機構 ３２…トルク検出器 1, 2 ... Cooling drum 3, 4 ... Side weir 5 ... Hot water pool portion 6 ... Thin cast piece 7, 8 ... Brush roll 13 ... Support shaft 14 ... Arm 16, 17 ... Stepping cylinder 24, 27 ... Belt 25 ... Motor 20 , 23, 26 ... Pulley 28 ... Guide frame 29 ... Control device 30 ... Brush current value detector 31 ... Drive mechanism 32 ... Torque detector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山地 千博 千葉県富津市新富20−１ 新日本製鐡株式 会社技術開発本部内 (72)発明者 脇山 洋一 広島県西区観音新町四丁目６番22号 三菱 重工業株式会社広島製作所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Chihiro Yamaji 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division (72) Inventor Yoichi Wakiyama 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima Prefecture No. Mitsubishi Heavy Industries Ltd. Hiroshima Works
Claims (6)
け、該湯溜り部に注入された溶融金属を前記冷却ドラム
の周面で冷却・凝固しながら薄肉鋳片を製造する連続鋳
造方法において、前記冷却ドラムの周面に圧接するブラ
シロールを回転せしめるブラシロール駆動モーターの電
流値を検出し、該電流値を制御することにより前記ブラ
シロールの冷却ドラム周面への喰込み量を調整すること
を特徴とする薄板連続鋳造機用のブラシ喰込み量制御方
法。1. A continuous process for producing a thin-walled slab by providing a molten metal pool on a part of the peripheral surface of a cooling drum and cooling and solidifying the molten metal injected into the molten metal pool on the peripheral surface of the cooling drum. In the casting method, the current value of the brush roll drive motor that rotates the brush roll that is in pressure contact with the peripheral surface of the cooling drum is detected, and the amount of bite of the brush roll to the peripheral surface of the cooling drum is controlled by controlling the current value. A method for controlling the amount of brush penetration for a continuous thin plate casting machine, which is characterized by adjusting
け、該湯溜り部に注入された溶融金属を前記冷却ドラム
の周面で冷却、凝固しながら薄肉鋳片を製造する連続鋳
造方法において、前記冷却ドラムの周面に圧接するブラ
シロールの回転軸の軸トルクを検出し、該軸トルクを制
御することにより前記ブラシロールの冷却ドラム周面へ
の喰込み量を調整することを特徴とする薄板連続鋳造機
用のブラシ喰込み量制御方法。2. A continuous process for producing a thin cast piece by providing a molten metal pool on a part of the peripheral surface of a cooling drum and cooling and solidifying the molten metal injected into the molten metal pool on the peripheral surface of the cooling drum. In the casting method, the axial torque of the rotating shaft of the brush roll that is in pressure contact with the peripheral surface of the cooling drum is detected, and the biting amount of the brush roll to the peripheral surface of the cooling drum is adjusted by controlling the axial torque. A method for controlling the amount of brush penetration for a thin plate continuous casting machine.
ておき、鋳造中検出した電流値が上記所望値になるよう
にブラシロールの駆動機構を調整する請求項１記載の方
法。3. The method according to claim 1, wherein the current value is set to a desired value in advance, and the brush roll drive mechanism is adjusted so that the current value detected during casting becomes the desired value.
しておき、鋳造中、検出した軸トルクが上記所望値にな
るようにブラシロール駆動機構を調整する請求項２記載
の方法。4. The method according to claim 2, wherein the shaft torque is set to a desired value in advance, and the brush roll drive mechanism is adjusted so that the detected shaft torque reaches the desired value during casting.
け、該湯溜り部に注入された溶融金属を前記冷却ドラム
の周面で冷却・凝固しながら薄肉鋳片を製造する連続鋳
造機において、前記冷却ドラム周面に圧接するブラシロ
ールと、該ブラシロールを回転せしめるブラシロール駆
動モータと、前記ブラシロールを冷却ドラム周面へ圧接
せしめる位置制御可能なシリンダーとを移動可能な基台
に設置するとともに、前記ブラシロール駆動モーターの
回転電流値を検出する検出手段と検出した電流値を制御
装置に入力する手段と、該入力電流値と適正範囲の回転
電流値とを比較し、該回転電流値を適正範囲内にするよ
うに前記位置制御可能なシリンダーを駆動せしめる指令
を出力する制御装置と、該制御装置からの出力によって
該シリンダーを駆動せしめる駆動手段を設けたことを特
徴とする連続鋳造機用のブラシ喰込み量制御装置。5. A continuous process for producing a thin-walled slab by providing a molten metal pool on a part of the peripheral surface of a cooling drum and cooling and solidifying the molten metal injected into the molten metal pool on the peripheral surface of the cooling drum. In a casting machine, a brush roll that presses against the peripheral surface of the cooling drum, a brush roll drive motor that rotates the brush roll, and a position-controllable cylinder that presses the brush roll against the peripheral surface of the cooling drum are movable bases. Installed on a table, a means for inputting the detected current value and a detected current value to the control device for detecting the rotation current value of the brush roll drive motor, and comparing the input current value and the rotation current value in an appropriate range, A control device that outputs a command to drive the position controllable cylinder so that the rotation current value is within an appropriate range, and the cylinder is driven by an output from the control device. A brush digging amount control device for a continuous casting machine, characterized in that a driving means for urging is provided.
け、該湯溜り部に注入された溶融金属を前記冷却ドラム
の周面で冷却・凝固しながら薄肉鋳片を製造する連続鋳
造機において、前記冷却ドラム周面に圧接するブラシロ
ールと、該ブラシロールを回転せしめるブラシロール駆
動モータと、前記ブラシロールを冷却ドラム周面へ圧接
せしめる位置制御可能なシリンダーとを移動可能な機台
に設置するとともに、前記ブラシロールの軸トルク検出
手段と検出したトルクを制御装置に入力する手段と、該
入力トルクと適正範囲のトルクとを比較して該トルクを
最適範囲内にするように前記シリンダーを駆動せしめる
指令を出力する制御装置と、該制御装置からの出力によ
って前記シリンダーを駆動せしめる駆動手段を設けたこ
とを特徴とする連続鋳造機用のブラシ喰込み量制御装
置。6. A continuous process for producing a thin cast slab by providing a molten metal pool on a part of the peripheral surface of a cooling drum and cooling and solidifying the molten metal injected into the molten metal pool on the peripheral surface of the cooling drum. In a casting machine, a machine capable of moving a brush roll that comes into pressure contact with the peripheral surface of the cooling drum, a brush roll drive motor that rotates the brush roll, and a position-controllable cylinder that presses the brush roll against the peripheral surface of the cooling drum. It is installed on a stand, and means for inputting the detected torque to the control device with the axial torque detecting means of the brush roll and the input torque and the torque in the proper range are compared so that the torque falls within the optimum range. A continuous device characterized by comprising a control device for outputting a command for driving the cylinder, and a drive means for driving the cylinder by an output from the control device. Brush biting amount control device for casting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3346420A JP2983361B2 (en) | 1991-12-27 | 1991-12-27 | Method and apparatus for controlling brush penetration for continuous sheet casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3346420A JP2983361B2 (en) | 1991-12-27 | 1991-12-27 | Method and apparatus for controlling brush penetration for continuous sheet casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05177311A true JPH05177311A (en) | 1993-07-20 |
| JP2983361B2 JP2983361B2 (en) | 1999-11-29 |
Family
ID=18383299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3346420A Expired - Fee Related JP2983361B2 (en) | 1991-12-27 | 1991-12-27 | Method and apparatus for controlling brush penetration for continuous sheet casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2983361B2 (en) |
Cited By (10)
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| US5651413A (en) * | 1995-10-06 | 1997-07-29 | Armco Inc. | In-situ conditioning of a strip casting roll |
| KR100657595B1 (en) * | 2005-12-23 | 2006-12-14 | 주식회사 포스코 | Magnesium Alloy Sheet Casting Machine with Sweeping Roll |
| US7296614B2 (en) | 2004-12-13 | 2007-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| WO2010057255A1 (en) * | 2008-11-20 | 2010-05-27 | Bluescope Steel Limited | Device for cleaning chilled roll in a twin roll caster |
| US7891407B2 (en) | 2004-12-13 | 2011-02-22 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| US8312917B2 (en) | 2004-12-13 | 2012-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| US8316920B2 (en) | 2008-11-20 | 2012-11-27 | Nucor Corporation | Brush roll for casting roll |
| KR20160078579A (en) * | 2014-12-24 | 2016-07-05 | 주식회사 포스코 | Apparatus and method for controlling brush roll for cleaning casting roll in twin roll strip casting |
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1991
- 1991-12-27 JP JP3346420A patent/JP2983361B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5651413A (en) * | 1995-10-06 | 1997-07-29 | Armco Inc. | In-situ conditioning of a strip casting roll |
| US7891407B2 (en) | 2004-12-13 | 2011-02-22 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| US7296614B2 (en) | 2004-12-13 | 2007-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| US7299857B2 (en) | 2004-12-13 | 2007-11-27 | Nucor Corporation | Method and apparatus for localized control of heat flux in thin cast strip |
| JP2008522830A (en) * | 2004-12-13 | 2008-07-03 | ニューコア・コーポレーション | Method and apparatus for localized control of heat flux in thin cast strips |
| KR101298578B1 (en) * | 2004-12-13 | 2013-08-22 | 누코 코포레이션 | Method for controlling the formation of crocodile skin surface roughness on thin cast strip |
| US8312917B2 (en) | 2004-12-13 | 2012-11-20 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| KR100657595B1 (en) * | 2005-12-23 | 2006-12-14 | 주식회사 포스코 | Magnesium Alloy Sheet Casting Machine with Sweeping Roll |
| US8316920B2 (en) | 2008-11-20 | 2012-11-27 | Nucor Corporation | Brush roll for casting roll |
| WO2010057255A1 (en) * | 2008-11-20 | 2010-05-27 | Bluescope Steel Limited | Device for cleaning chilled roll in a twin roll caster |
| CN107008870A (en) * | 2008-11-20 | 2017-08-04 | 卡斯特里普公司 | Chill roll cleaning device in dual roll casting machine |
| KR20160078579A (en) * | 2014-12-24 | 2016-07-05 | 주식회사 포스코 | Apparatus and method for controlling brush roll for cleaning casting roll in twin roll strip casting |
| CN115625202A (en) * | 2022-09-27 | 2023-01-20 | 张家港中美超薄带科技有限公司 | Method for improving local high points of hot-rolled thin strip steel |
| WO2024066742A1 (en) * | 2022-09-27 | 2024-04-04 | 江苏省沙钢钢铁研究院有限公司 | Method for mitigating local high points of hot-rolled thin steel strip |
| CN118513518A (en) * | 2024-07-23 | 2024-08-20 | 张家港中美超薄带科技有限公司 | A method for improving the shoulder defect of thin strip steel |
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