JPH0526583B2 - - Google Patents
Info
- Publication number
- JPH0526583B2 JPH0526583B2 JP60071092A JP7109285A JPH0526583B2 JP H0526583 B2 JPH0526583 B2 JP H0526583B2 JP 60071092 A JP60071092 A JP 60071092A JP 7109285 A JP7109285 A JP 7109285A JP H0526583 B2 JPH0526583 B2 JP H0526583B2
- Authority
- JP
- Japan
- Prior art keywords
- drum
- drums
- molten steel
- twin
- present
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
-
- 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
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、凝固シエルの合致点位置を制御して
鋳片の横割れやバルジングを防止するツインドラ
ム方式による薄板連続鋳造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous thin plate casting method using a twin-drum method, which controls the position of matching points of solidified shells to prevent transverse cracking and bulging of slabs.
（先行技術）
ドラム式薄板鋳造装置において凝固シエル厚さ
を制御して鋳片の横割れ、バルジング防止対策と
して、２枚の凝固シエルの合致点位置を制御する
基本発明については、本発明者等はすでに提案し
ている（特願昭58−200075号）。しかしながら、
この具体的手段については未だ提案されていな
い。(Prior Art) The basic invention of controlling the matching point position of two solidified shells as a measure to prevent transverse cracking and bulging of slabs by controlling the thickness of the solidified shells in a drum-type thin plate casting machine was disclosed by the present inventors. has already been proposed (Patent Application No. 58-200075). however,
No specific measures have been proposed yet.
（発明が解決しようとする問題点）
本発明は、この具体的手段を提供するものであ
り、詳細には、本発明は、凝固シエルの合致点位
置を制御して鋳片の横割れ並びにバルジングを防
止できるツインドラム方式による薄板連続鋳造方
法を提供することを日的とする。(Problems to be Solved by the Invention) The present invention provides specific means for this purpose. Specifically, the present invention controls the position of the matching point of the solidified shell to prevent horizontal cracking and bulging of the slab. The objective of the present invention is to provide a continuous thin plate casting method using a twin-drum method that can prevent such problems.
（問題点を解決するための手段）
そして、本発明は、上記目的を達成する手段と
して、ドラム間隔の変化を検出し、この検出信号
をタンデツシユ流量へフイードバツクし、これに
よつてドラム間の溶鋼レベルを調節する点にあ
る。すなわち、本発明は、ツインドラム式薄板連
続鋳造方法において、ドラムに対して一定の押付
力を加え、溶湯及び凝固シエルの圧力の変化に応
じてドラム間隔を変動可能とし、かつ、ツインド
ラムの間隔の変位を検知して、該変位を無くする
ように溶湯の供給量を調節し、溶湯とドラムとの
接触長を制御することを特徴とする薄板連続鋳造
方法である。(Means for Solving the Problems) The present invention, as a means for achieving the above object, detects the change in drum interval, feeds back this detection signal to the tundish flow rate, and thereby feeds the molten steel between the drums. The point is to adjust the level. That is, the present invention applies a constant pressing force to the drums in a twin-drum type continuous thin plate casting method, and makes it possible to change the distance between the drums according to changes in the pressure of the molten metal and the solidified shell, and to change the distance between the twin drums. This continuous thin plate casting method is characterized in that the displacement of the drum is detected, the amount of molten metal supplied is adjusted to eliminate the displacement, and the contact length between the molten metal and the drum is controlled.
本発明では、ツインドラムを一定の力で加圧
し、凝固シエル厚さ変化にともなうドラム間のギ
ヤツプ変化によつてツインドラム間の溶鋼レベル
を調節してシエル厚が一定になるように制御する
ものであり、そして、上記ドラム間のギヤツプ変
化を示す信号に不感帯を設け、この不感帯からず
れた時にドラム間の溶鋼レベルを制御するように
することもできるものである。 In the present invention, the twin drums are pressurized with a constant force, and the molten steel level between the twin drums is controlled by changing the gap between the drums as the thickness of the solidified shell changes, so that the shell thickness remains constant. It is also possible to provide a dead zone in the signal indicating the gap change between the drums, and to control the molten steel level between the drums when the signal deviates from this dead zone.
以下、第１図及び第２図に基づいて本発明を詳
細に説明する。第１図は本発明の実施例を示す図
であり、第２図はドラム間隔ｄとドラム回転速度
Ｖとの関係図である。 Hereinafter, the present invention will be explained in detail based on FIGS. 1 and 2. FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between the drum interval d and the drum rotation speed V.
第１図において、１はタンデイツシユ、２はタ
ンデイツシユ内溶鋼、３はツインドラム間溶鋼、
４ａ，４ｂは水冷式ドラム、５はツインドラム間
の溶鋼レベルを検出するためのTVカメラ、６は
信号処理装置、７はレベル設定器、８はタンデイ
ツシユ流量調節計、９は弁駆動装置、１０はスト
ツパー弁、１１ａ，１１ｂは減速器、１２はモー
タ、１３はモータ制御装置、１４は速度設定器、
１５は油圧シリンダ、１６は圧力調節装置、１７
は油圧ポンプ、１８は変位検出器、１９は調節計
である。 In Fig. 1, 1 is the tundish, 2 is the molten steel in the tundish, 3 is the molten steel between the twin drums,
4a and 4b are water-cooled drums, 5 is a TV camera for detecting the molten steel level between the twin drums, 6 is a signal processing device, 7 is a level setting device, 8 is a tundish flow controller, 9 is a valve drive device, 10 is a stopper valve, 11a and 11b are reducers, 12 is a motor, 13 is a motor control device, 14 is a speed setting device,
15 is a hydraulic cylinder, 16 is a pressure regulator, 17
is a hydraulic pump, 18 is a displacement detector, and 19 is a controller.
上記ツインドラム式薄板連鋳設備では２つのド
ラムに接触した溶鋼がそれぞれのドラムで凝固シ
エルを生成し、ロールの出側で重ね合わされて板
となる。したがつて、一方のドラムで出口板厚の
１／２の厚さのシエルを作る必要があり、それぞれ
のドラムで生成されるシエル厚さＴ／２は次式で
表わされる。 In the above-mentioned twin-drum continuous thin plate casting equipment, molten steel in contact with the two drums produces a solidified shell in each drum, which is overlapped on the exit side of the roll to form a plate. Therefore, it is necessary to make a shell with a thickness of 1/2 of the outlet plate thickness in one drum, and the shell thickness T/2 produced in each drum is expressed by the following equation.
（式中Ｔは板厚、ｋは凝固定数、ｔは溶鋼がドラ
ム面に接触する時間、ｌは溶鋼がドラム面に接触
する長き、Ｖはドラム速度をそれぞれ示す。）
ところで、ドラム４ｂを加圧する油圧シリンダ
ー１５の油圧を一定して、溶鋼接触時間ｔを変化
したときのドラム間隔（油圧シリンダ））の動き
は第２図に示すようになる。第２図から、ドラム
速度が一定V0であれば、ｌ（ｔ）が大きくなる
と、シエル厚が厚くなつてドラム間隔は拡大し、
ｌ（ｔ）が小さくなると逆になることが分かる。
このことからシエル厚を一定にするには、ドラム
間隔を変化検出器１８で検出して、ドラム間溶鋼
レベルの制御を行うタンデイツシユ流量調節計１
９の入力にフイードバツクすることによつてタン
デイツシユ１内のストツパー弁１０の開度を調節
し、ドラム間の溶鋼レベルを変化させて（換言す
れば、溶鋼接触長ｌを変化させることになる。）
Ｔ／２を一定にすることができる。 (In the formula, T is the plate thickness, k is the solidification number, t is the time that the molten steel is in contact with the drum surface, l is the length of time that the molten steel is in contact with the drum surface, and V is the drum speed.) FIG. 2 shows the movement of the drum interval (hydraulic cylinder) when the molten steel contact time t is varied while keeping the oil pressure of the hydraulic cylinder 15 constant. From Figure 2, if the drum speed is constant V 0 , as l(t) increases, the shell thickness increases and the drum spacing increases.
It can be seen that the opposite is true when l(t) becomes smaller.
From this, in order to keep the shell thickness constant, the drum interval is detected by the change detector 18, and the tundish flow controller 1 controls the molten steel level between the drums.
9, the opening degree of the stopper valve 10 in the tundish 1 is adjusted, and the molten steel level between the drums is changed (in other words, the molten steel contact length l is changed).
T/2 can be kept constant.
溶鋼の温度変化、ドラムの冷却状態変化などに
よつて、シエル厚が変化しても、本発明では、溶
鋼接触長の調節によつて、それぞれのドラムで生
成されるシエル厚を最適にすることができるの
で、割れ、バルジングなどの防止ができる。 Even if the shell thickness changes due to changes in the temperature of the molten steel, changes in the cooling state of the drum, etc., the present invention can optimize the thickness of the shell produced in each drum by adjusting the molten steel contact length. This prevents cracking, bulging, etc.
なお、上記ドラム間隙変位信号に±△ｄの不感
帯を設け、この不感帯からずれた時に溶鋼レベル
を制御することもできる。 It is also possible to provide a dead zone of ±Δd in the drum gap displacement signal and control the molten steel level when it deviates from this dead zone.
本発明は、以上詳記したように、ドラム間隔の
変化を検出し、この検出信号をタンデイツシユ流
量にフイードバツクさせることにより、ドラム間
の溶鋼レベルを調節するものであるから、ドラム
間の溶鋼湯面を安定させながら、鋳片の横割れ並
びにバルジングを防止することができる効果が生
ずるものである。
As described in detail above, the present invention adjusts the molten steel level between the drums by detecting changes in the drum interval and feeding back this detection signal to the tundish flow rate. This has the effect of preventing transverse cracking and bulging of the slab while stabilizing the cast slab.
第１図は本発明の実施例を示す図であり、第２
図はドラム間隔ｄとドラム速度Ｖとの関係図であ
る。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG.
The figure is a diagram showing the relationship between the drum interval d and the drum speed V.
Claims (1)
ドラムに対して一定の押付力を加え、溶湯及び凝
固シエルの圧力の変化に応じてドラム間隔を変動
可能とし、かつ、ツインドラムの間隔の変位を検
知して、該変位を無くすように溶湯の供給量を調
節し、溶湯とドラムとの接触長を制御することを
特徴とする薄板連続鋳造方法。1 In the twin drum continuous thin plate casting method,
A constant pressing force is applied to the drum, the distance between the drums can be varied according to changes in the pressure of the molten metal and the solidified shell, and displacement of the distance between the twin drums is detected and the molten metal is adjusted to eliminate the displacement. A continuous thin plate casting method characterized by adjusting the supply amount and controlling the contact length between the molten metal and the drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7109285A JPS61232045A (en) | 1985-04-05 | 1985-04-05 | Continuous casting method for thin sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7109285A JPS61232045A (en) | 1985-04-05 | 1985-04-05 | Continuous casting method for thin sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61232045A JPS61232045A (en) | 1986-10-16 |
| JPH0526583B2 true JPH0526583B2 (en) | 1993-04-16 |
Family
ID=13450546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7109285A Granted JPS61232045A (en) | 1985-04-05 | 1985-04-05 | Continuous casting method for thin sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61232045A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2697908B2 (en) * | 1989-08-03 | 1998-01-19 | 新日本製鐵株式会社 | Control device of twin roll continuous casting machine |
| AT411822B (en) † | 2002-09-12 | 2004-06-25 | Voest Alpine Ind Anlagen | METHOD AND DEVICE FOR STARTING A CASTING PROCESS |
| SE527507C2 (en) † | 2004-07-13 | 2006-03-28 | Abb Ab | An apparatus and method for stabilizing a metallic article as well as a use of the apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5956950A (en) * | 1982-09-28 | 1984-04-02 | Nippon Kokan Kk <Nkk> | Continuous casting method for metal plates |
| JPS6064754A (en) * | 1983-09-19 | 1985-04-13 | Hitachi Ltd | Continuous casting method and device for thin strip plate |
-
1985
- 1985-04-05 JP JP7109285A patent/JPS61232045A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61232045A (en) | 1986-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |