EP0331612B1 - Procédé dans une installation de coulée pour la fabrication de billettes - Google Patents
Procédé dans une installation de coulée pour la fabrication de billettes Download PDFInfo
- Publication number
- EP0331612B1 EP0331612B1 EP89730014A EP89730014A EP0331612B1 EP 0331612 B1 EP0331612 B1 EP 0331612B1 EP 89730014 A EP89730014 A EP 89730014A EP 89730014 A EP89730014 A EP 89730014A EP 0331612 B1 EP0331612 B1 EP 0331612B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- strand
- drive assembly
- mold
- mould
- 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
Images
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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Definitions
- the invention relates to a method for controlling or regulating the drive unit of a casting installation for producing strands, in particular steel strands, in which liquid metal is introduced into a continuous mold and withdrawn from the mold in the partially solidified state, and a device for carrying out the method.
- the pull-out machine is controlled according to a predetermined strand withdrawal speed.
- the withdrawal direction and withdrawal speed during a casting are normally the same.
- US Pat. Nos. 3,478,808 and 3,358,743 to measure the current consumption of the drive device of the pulling machine and into a control circuit for controlling or regulating one Continuous caster included.
- this method should provide information about the sliding conditions of the strand in the mold. From these documents it is also known to obtain further information about the strand produced, for example by measuring the surface temperature of the strand below the mold, the strand thickness or also by measuring the length of the strand produced, and to include this information in the control loop of the continuous casting installation.
- the direction of withdrawal can remain the same with continuous movement of the strand; however, the strand can also be conveyed step by step with intermediate stopping times or additionally with a short backward stroke and a further stopping time will.
- the drive unit is usually arranged in the area of the solidified strand. Between the mold and the drive unit, i.e. in the area of the solidification section, part of the strand is still liquid and the thin strand shell has only a low strength at the high temperatures.
- the invention has for its object to detect the behavior of a metal strand as close as possible to the point of production and to provide a method and an apparatus with which it is possible, in particular the drive unit for the strand withdrawal of a continuous casting system, in particular a continuous casting system with horizontally arranged mold and discontinuous To control or regulate the strand draw in such a way that the actual circumstances are better taken into account.
- the invention proposes that the signal characterizing the path-time behavior of the strand is compared in the evaluation unit with a signal which corresponds to a control command for the drive unit pulling the strand out of the mold - after appropriate control engineering preparation and deviations of the measurement signal from the control signal of a control unit of the drive unit are applied such that the movement sequence transmitted from the drive unit to the line corresponds to a predetermined path-time behavior of the line at the measurement location.
- the measures according to the invention make it possible for the first time to record the actual movement behavior of the strand. It is also achieved that the strand withdrawal can be controlled according to the desired movement behavior of the strand. This is of particular importance.
- JP-A-57-139457 on which the preambles of claims 1 and 3 are based, in which the line speed is detected by means of a detector in the form of a roll.
- the path-time behavior of the strand at a further measuring location between the mold and the drive unit is recorded simultaneously.
- the two measuring locations should be spaced from each other.
- the second measuring point is conveniently located immediately before the strand enters the Drive unit.
- the simultaneous detection of the strand movement at two separate measuring locations makes it possible to obtain information as to whether, under certain conditions, depending on, for example, the casting speed, format, temperature, quality, the measuring signal obtained at the mold outlet may be falsified by natural vibrations of the strand. It is thus possible to operate a casting system outside of a range of critical vibrations, if necessary with automatic control of the pull-out system.
- the invention also includes a device for carrying out the method according to claim 1 on a casting installation which consists of a casting vessel, a continuous casting mold and a drive unit for the strand take-off.
- the invention provides that at least one diode line camera, which detects the strand surface, is arranged downstream of the mold, the measurement signal of which is fed to an evaluation unit, and that the control unit of the drive unit is also connected to the evaluation unit, the evaluation unit simultaneously regulating into the control unit of the Drive unit can intervene and that a display unit is connected to the evaluation unit.
- Figure 1 shows the basic structure of a device according to the invention.
- a casting vessel 1 which can represent a ladle or a distributor, is followed by the mold 2, from which the strand 3 is drawn off with the aid of the drive unit 4.
- the drive unit 4 is designed to enable gradual withdrawal of the strand.
- the drive unit 4 is controlled by a control unit 7.
- the movement sequence transmitted from the drive unit 4 to the strand 3 is detected by means of a diode line camera 5, which is arranged directly after the mold 2.
- the diode line camera 5 is like this arranged so that it can view the surface of the strand in this area. Striking features of the surface are transmitted as measurement signals from the diode line camera 5 to the evaluation unit 6.
- the evaluation unit 6 determines relevant pixels cyclically at a high frequency and assigns them to a path / time scheme. This evaluation enables a direct conclusion to be drawn about the actual sequence of movements, that is to say the path-time behavior of the strand directly at the mold. In the evaluation unit 6, a comparison of this actual movement sequence with the signals of the control unit 7 for the drive unit 4 is also carried out. If the measurement signal of the diode line camera 5 deviates from the control signals of the control unit 7, the control program is corrected so that the line movement generated by the drive unit 4 corresponds to the desired line movement that can be controlled by the diode line camera 5.
- a further diode line camera 5 ' is arranged in the vicinity of the inlet of the strand in the drive unit 4.
- the measurement signals of the diode line camera 5 ' are also fed to the evaluation unit 6. This makes it possible to take into account the natural vibrations of the line or the system or to set the driving style of the entire system so that critical areas are avoided.
- the measurement result of the strand movement can of course be displayed on a display unit 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Bridges Or Land Bridges (AREA)
- Preliminary Treatment Of Fibers (AREA)
Claims (3)
- Procédé pour commander ou régler l'unité d'entraînement d'une installation de coulée pour produire des barres, en particulier des barres d'acier, dans lequel du métal liquide est introduit dans une coquille continue (2) et extrait de la coquille à l'état partiellement solidifié, et la vitesse de la barre est détectée,
caractérisé en ce que l'allure du mouvement de la barre (3) est détectée, sans contact et sans retard, dans une zone directement après la sortie de la coquille (2), par des capteurs (5) sensibles à un rayonnement, et les capteurs sont étudiés et agencés de sorte qu'ils créent un signal de mesure exploitable par l'intermédiaire du comportement dans le temps et dans l'espace de la barre, et en ce que le signal caractérisant le comportement dans le temps et dans l'espace de la barre est comparé dans une unité d'exploitation (6) à un signal qui correspond à un ordre de commande pour l'unité d'entraînement (4) qui extrait la barre de la coquille, et des écarts entre le signal de mesure et le signal de commande d'une unité de commande (7) de l'unité d'entraînement (4) sont pris en compte de sorte que l'allure du mouvement à transmettre de l'unité d'entraînement (4) à la barre (3) corresponde à un comportement dans le temps et dans l'espace prédéfini de la barre (3) au lieu de mesure. - Procédé selon la revendication 1,
caractérisé en ce que le comportement dans le temps et dans l'espace de la barre (3) est détecté en même temps dans un autre lieu de mesure (5′) entre la coquille (2) et l'unité d'entraînement (4). - Dispositif pour la mise en oeuvre du procédé selon la revendication 1, dans une installation de coulée constituée d'un récipient de coulée (1), d'une coquille de coulée continue (2) et d'une unité d'entraînement (4) pour extraire la barre,
caractérisé par au moins une caméra à lignes de diodes (5,5′), agencée en aval de la coquille (2) et détectant la surface de la barre (3), une unité d'exploitation (6) qui est reliée à la caméra à lignes de diodes (5,5′), une unité de commande (7) de l'unité d'entraînement (4) qui, de même, est reliée à l'unité d'exploitation (6), et une unité d'affichage (8) raccordée à l'unité d'exploitation (6).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89730014T ATE86898T1 (de) | 1988-02-26 | 1989-01-23 | Verfahren an einer giessanlage zur erzeugung von straengen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3806583 | 1988-02-26 | ||
DE3806583A DE3806583A1 (de) | 1988-02-26 | 1988-02-26 | Verfahren an einer giessanlage zur erzeugung von straengen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0331612A2 EP0331612A2 (fr) | 1989-09-06 |
EP0331612A3 EP0331612A3 (en) | 1990-09-05 |
EP0331612B1 true EP0331612B1 (fr) | 1993-03-17 |
Family
ID=6348537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89730014A Expired - Lifetime EP0331612B1 (fr) | 1988-02-26 | 1989-01-23 | Procédé dans une installation de coulée pour la fabrication de billettes |
Country Status (6)
Country | Link |
---|---|
US (1) | US4884624A (fr) |
EP (1) | EP0331612B1 (fr) |
JP (1) | JPH01254362A (fr) |
AT (1) | ATE86898T1 (fr) |
DE (2) | DE3806583A1 (fr) |
ES (1) | ES2039088T3 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5293925A (en) * | 1990-12-26 | 1994-03-15 | Kawasaki Jukogyo Kabushiki Kaisha | Method of and apparatus for withdrawing strand in horizontal continuous casting installation |
DE4219335A1 (de) * | 1992-06-10 | 1993-12-16 | Mannesmann Ag | Mehrfach-Horizontalstranggießanlage und Verfahren zu ihrem Betrieb |
DE19614760A1 (de) * | 1996-04-02 | 1997-10-09 | Mannesmann Ag | Verfahren zur Optimierung der Strangoberflächenqualität |
DE19725433C1 (de) * | 1997-06-16 | 1999-01-21 | Schloemann Siemag Ag | Verfahren und Vorrichtung zur Durchbruchfrüherkennung beim Stranggießen von Stahl mit einer oszillierenden Kokille |
DE10028304A1 (de) * | 2000-06-07 | 2001-12-13 | Sms Demag Ag | Verfahren und Vorrichtung zur dezentralen Gießdatenverarbeitung der an einer Stranggießkokille über Sensoren gewonnenen Meßdaten |
DE10349962B3 (de) * | 2003-10-24 | 2005-06-02 | Ingo Dr. Schubert | Anordnung zur Ermittlung der Konsistenz eines Gießstranges in einer Stranggießalage und/oder Maulweite derselben |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3478808A (en) * | 1964-10-08 | 1969-11-18 | Bunker Ramo | Method of continuously casting steel |
US3358743A (en) * | 1964-10-08 | 1967-12-19 | Bunker Ramo | Continuous casting system |
DE2501868C3 (de) * | 1975-01-15 | 1978-08-03 | Mannesmann Ag, 4000 Duesseldorf | Verfahren zur Regelung und Überwachung des Stranggießens von Stahl |
SU784975A1 (ru) * | 1978-01-06 | 1980-12-07 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Автоматизации Производственных Процессов В Промышленности | Способ управлени машиной непрерывного лить заготовок |
SU784974A1 (ru) * | 1978-01-25 | 1980-12-07 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Автоматизации Производственных Процессов В Промышленности | Устройство дл автоматического управлени машиной непрерывного лить заготовок |
CH637047A5 (de) * | 1978-12-29 | 1983-07-15 | Lauener W F Ag | Verfahren zur geschwindigkeitssteuerung einer bandgiess- und walzanlage und gemaess diesem verfahren gesteuerte anlage. |
SU900952A1 (ru) * | 1979-11-14 | 1982-01-30 | Всесоюзный Научно-Исследовательский И Проектный Институт Вторичных Цветных Металлов | Устройство дл автоматического управлени установкой непрерывной разливки металлов |
SU904880A1 (ru) * | 1980-01-04 | 1982-02-15 | Всесоюзный Научно-Исследовательский И Проектный Институт Вторичных Цветных Металлов | Система дл автоматического управлени установкой непрерывной разливки металла |
JPS5797857A (en) * | 1980-12-10 | 1982-06-17 | Kobe Steel Ltd | Method for controlling drawing speed of horizontal and continuous casting plant |
JPS57139457A (en) * | 1981-02-20 | 1982-08-28 | Nippon Steel Corp | Method for controlling position and shape of perfect solidification point in width direction of ingot in continuous casting |
SU1039642A1 (ru) * | 1981-06-16 | 1983-09-07 | Белорусский Ордена Трудового Красного Знамени Политехнический Институт | Устройство дл автоматического управлени периодическим выт гиванием слитка при непрерывном литье |
DE3307176A1 (de) * | 1983-03-01 | 1984-09-06 | Naučno-proizvodstvennoe ob"edinenie Tulačermet, Tula | Steuerverfahren fuer das ausziehen eines giessstranges aus einer kokille bei horizontalem stranggiessen und einrichtung zur durchfuehrung des verfahrens |
JPS6163349A (ja) * | 1984-09-05 | 1986-04-01 | Nippon Kokan Kk <Nkk> | 水平連続鋳造設備における鋳片押戻量制御方法 |
-
1988
- 1988-02-26 DE DE3806583A patent/DE3806583A1/de not_active Withdrawn
-
1989
- 1989-01-23 AT AT89730014T patent/ATE86898T1/de not_active IP Right Cessation
- 1989-01-23 EP EP89730014A patent/EP0331612B1/fr not_active Expired - Lifetime
- 1989-01-23 DE DE8989730014T patent/DE58903763D1/de not_active Expired - Fee Related
- 1989-01-23 ES ES198989730014T patent/ES2039088T3/es not_active Expired - Lifetime
- 1989-02-21 JP JP1041482A patent/JPH01254362A/ja active Pending
- 1989-02-24 US US07/315,886 patent/US4884624A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE58903763D1 (de) | 1993-04-22 |
DE3806583A1 (de) | 1989-09-07 |
JPH01254362A (ja) | 1989-10-11 |
ATE86898T1 (de) | 1993-04-15 |
US4884624A (en) | 1989-12-05 |
ES2039088T3 (es) | 1993-08-16 |
EP0331612A2 (fr) | 1989-09-06 |
EP0331612A3 (en) | 1990-09-05 |
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