EP0144795B1 - Method of oscillating a horizontal continuous-casting mould for metals, especially steel - Google Patents
Method of oscillating a horizontal continuous-casting mould for metals, especially steel Download PDFInfo
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- EP0144795B1 EP0144795B1 EP84113517A EP84113517A EP0144795B1 EP 0144795 B1 EP0144795 B1 EP 0144795B1 EP 84113517 A EP84113517 A EP 84113517A EP 84113517 A EP84113517 A EP 84113517A EP 0144795 B1 EP0144795 B1 EP 0144795B1
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- casting
- mold
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- mould
- oscillation frequency
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
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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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating the moulds
Definitions
- the invention relates to a method for oscillating an inherently rigid horizontal continuous casting mold for metals, in particular steel, which carries out sinusoidally oscillating lifting movements in the casting direction and the counter-casting direction, the strand being drawn off continuously.
- the method of the type mentioned is carried out, for example, in a horizontal continuous casting installation, which is described in DE-OS 27 37 835.
- the continuous casting mold together with the upstream storage container, is a movable, mounted unit, the casting cavity of the rigid casting mold, which is rigid in itself, having a cross-sectional reduction on its sprue side.
- the known horizontal continuous caster is also equipped with an oscillation drive, via which the mold stroke between 0 to 5 mm and the mold oscillation frequency between 0 to 500 / min. is adjustable.
- Horizontal continuous casting molds generally have the disadvantage that the cast products produced have a lower surface quality than the products of vertical continuous casting molds. This depends u. a. together with the use of a tear-off ring arranged between the storage container and the continuous casting mold, which represents a narrowing of the casting cavity. Since the formation of the strand shell begins at the connection point between the tear-off ring and the continuous casting mold, when it oscillates in the casting direction, it has the effect of a piston which compresses the strand shell.
- furnace-independent continuous casting molds which include the circular molds as well as the circular molds
- act like a sleeve i. H. the strand shell is only compressed until a relative movement occurs between these components after the friction between the strand shell and the continuous casting mold has been overcome.
- the points of view that must be taken into account when designing vertical or circular arc molds cannot be transferred to the conditions in horizontal continuous casting (cf. DE-OS 31 37119).
- the invention is based on the object of specifying an oscillation method for an oscillating horizontal continuous casting mold which operates with a continuous extrusion movement and which, with justifiable technical outlay, enables the production of a cast product with improved quality.
- the strand to be produced should not have a flaky surface or deep imperfections, which may require pretreatment of the strand surface before further processing.
- the process is primarily intended to enable the processing of steel; however, it can easily be used in the manufacture of strands from other metals.
- the method according to the invention then leaves the path which experts have taken for a long time to work with an intermittent strand withdrawal movement despite the increased economic and technical effort involved.
- the method of the second-mentioned document works without recoil of the strand in the direction of the horizontal continuous casting mold; however, it involves considerable additional effort in that, in addition, for example by moving the horizontal continuous casting mold, shock-like impulses are transmitted to the strand in the casting direction. If the known method works with superimposition of the strand pulling and impulse movement, the horizontal continuous casting mold no longer leads. Apart from the other differences, the information about the path to be covered when generating the impulse does not indicate that compliance with a compression path of the order of magnitude of at most a few tenths of a millimeter is important.
- the method according to the invention assumes that a good strand surface can only be achieved if the speed of the horizontal continuous casting mold in the casting direction is greater than the casting speed (corresponding to the strand withdrawal speed).
- This requirement can be taken into account in that by mutually coordinating the three variable variables - mold oscillation frequency, mold stroke and casting speed - a minimum value of 2hr is maintained for the average advance of the continuous casting mold with respect to the strand, corresponding to approximately 0.64.
- the three sizes mentioned are chosen so that the compression path, ie the distance covered during the advance of the continuous casting mold with respect to the strand in the casting direction, is at most 1 mm, preferably even only 0.1 to 0.5 mm.
- the process is otherwise carried out so that the mold oscillation frequency has a minimum value of about 100 / min. not less.
- the strand-shell growth element formed during an oscillation process has only a low degree of solidification and, consequently, has no deep defect after being detached from the tear-off ring.
- a minimum oscillation frequency of 120 / min is preferred. used (claim 2).
- the mold stroke carried out during an oscillation process should be at most 6 mm, preferably at most 5 mm (claim 3).
- the method according to the invention is expediently carried out in such a way that the mold stroke is even set to only 2 to 4 mm at the minimum oscillation frequency.
- the three variable sizes of mold oscillation frequency, mold stroke and casting speed depend on each other in such a way to coordinate that both the minimum value of the advance and the maximum value of the compression path are observed; this can be achieved by specifying the relevant quantities via a process computer.
- the horizontal continuous casting mold which is suitable for carrying out the method according to the invention consequently has an oscillation drive which can be set to the required extent with regard to the mold oscillation frequency and mold stroke; moreover, the associated strand take-off drive must be designed in such a way that the strand take-off speed representing the casting speed can be varied within a sufficiently wide range.
- the required values for the advance and the compression path can only be maintained if the mold oscillation frequency is between 120 to 200 / min. is or more than 250 / min. is.
- the mold oscillation frequency is in the range between approximately 110 to 150 or 130 to 200 or 160 to 270 or above 320 / min. must lie.
- the exemplary embodiments show that at a given casting speed (corresponding to the strand withdrawal speed), taking into account the required magnitude of the advance and the compression path, the higher values of the mold oscillation frequency to be aimed for can be achieved if a relatively small mold stroke is used. A reduction in the mold stroke also leads to an increase in the suitable range of the mold oscillation frequency.
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Oszillieren einer in sich starren Horizontal-Stranggießkokille für Metalle, insbesondere Stahl, die sinusförmig ozillierende Hubbewegungen in Gießrichtung und Gegengießrichtung ausführt, wobei der Strang kontinuierlich abgezogen wird.The invention relates to a method for oscillating an inherently rigid horizontal continuous casting mold for metals, in particular steel, which carries out sinusoidally oscillating lifting movements in the casting direction and the counter-casting direction, the strand being drawn off continuously.
Das Verfahren der eingangs genannten Gattung wird beispielsweise bei einer Horizontal-Stranggießanlage ausgeführt, welche in der DE-OS 27 37 835 beschrieben ist.The method of the type mentioned is carried out, for example, in a horizontal continuous casting installation, which is described in DE-OS 27 37 835.
Die Stranggießkokille stellt dabei mit dem vorgeschalteten Vorratsbehälter eine bewegliche gelagerte Einheit dar, wobei der Gießhohlraum der in sich starren Stranggießkokille auf deren Eingußseite eine Querschnittsverkleinerung aufweist.The continuous casting mold, together with the upstream storage container, is a movable, mounted unit, the casting cavity of the rigid casting mold, which is rigid in itself, having a cross-sectional reduction on its sprue side.
Die bekannte Horizontal-Stranggießanlage ist im übrigen mit einem Oszillationsantrieb ausgestattet, über den der Kokillenhub zwischen 0 bis 5 mm und die Kokillen-Oszillationsfrequenz zwischen 0 bis 500/min. einstellbar ist.The known horizontal continuous caster is also equipped with an oscillation drive, via which the mold stroke between 0 to 5 mm and the mold oscillation frequency between 0 to 500 / min. is adjustable.
Die in Rede stehende Vorveröffentlichung enthält keinen Hinweis darauf, in welcher Weise die hier angesprochenen veränderlichen Größen Kokillenhub, Kokillen-Oszillationsfrequenz und Gießgeschwindigkeit (entsprechend der Strangabzugsgeschwindigkeit) aufeinander abgestimmt sein sollten, um zu einem Gußerzeugnis ausreichender Qualität, insbesondere ohne Fehlstellen im Bereich der Strangoberfläche, zu gelangen.The prior publication in question contains no indication of the manner in which the variable variables of mold stroke, mold oscillation frequency and casting speed (corresponding to the strip take-off speed) discussed here should be coordinated with one another in order to produce a cast product of sufficient quality, in particular without defects in the area of the strand surface, to get.
Horizontal-Stranggießkokillen sind im allgemeinen mit dem Nachteil behaftet, daß die hergestellten Gußerzeugnisse eine geringere Oberflächengüte aufweisen als die Erzeugnisse von Vertikal-Stranggießkokillen. Dies hängt u. a. mit der Verwendung eines zwischen Vorratsbehälter und Stranggießkokille angeordneten Abreißrings zusammen, welcher eine Verengung des Gießhohlraums darstellt. Da die Bildung der Strangschale an der Verbindungsstelle zwischen dem Abreißring und der Stranggießkokille einsetzt, weist diese bei ihrer oszillierenden Bewegung in Gießrichtung die Wirkung eines Kolbens auf, welcher die Strangschale staucht.Horizontal continuous casting molds generally have the disadvantage that the cast products produced have a lower surface quality than the products of vertical continuous casting molds. This depends u. a. together with the use of a tear-off ring arranged between the storage container and the continuous casting mold, which represents a narrowing of the casting cavity. Since the formation of the strand shell begins at the connection point between the tear-off ring and the continuous casting mold, when it oscillates in the casting direction, it has the effect of a piston which compresses the strand shell.
Im Gegensatz dazu wirken die ofenunabhängigen Stranggießkokillen (zu denen neben den Vertikalkokillen auch die Kreisbogenkokillen zählen) wie eine Hülse, d. h. eine Stauchung der Strangschale findet nur solange statt, bis nach Überwindung der Reibung zwischen Strangschale und Stranggießkokille zwischen diesen Bestandteilen eine Relativbewegung eintritt. Angesichts dieses wesentlichen Unterschieds lassen sich die Gesichtspunkte, die bei der Auslegung von Vertikal- bzw. Kreisbogenkokillen zu berücksichtigen sind, nicht auf die Verhältnisse beim Horizontal-Stranggießen übertragen (vgl. dazu DE-OS 31 37119).In contrast, the furnace-independent continuous casting molds (which include the circular molds as well as the circular molds) act like a sleeve, i. H. the strand shell is only compressed until a relative movement occurs between these components after the friction between the strand shell and the continuous casting mold has been overcome. In view of this essential difference, the points of view that must be taken into account when designing vertical or circular arc molds cannot be transferred to the conditions in horizontal continuous casting (cf. DE-OS 31 37119).
Der Erfindung liegt die Aufgabe zugrunde, ein Oszillationsverfahren für eine oszillierende, bei kontinuierlicher Strangabziehbewegung arbeitende Horizontal-Stranggießkokille anzugeben, welches bei vertretbarem technischem Aufwand die Herstellung eines Gußerzeugnisses mit verbesserter Qualität ermöglicht. Insbesondere soll der zu erzeugende Strang weder eine geschuppte Oberfläche noch tiefgehende Fehlstellen aufweisen, die ggf. eine Vorbehandlung der Strangoberfläche vor der Weiterverarbeitung erforderlich machen.The invention is based on the object of specifying an oscillation method for an oscillating horizontal continuous casting mold which operates with a continuous extrusion movement and which, with justifiable technical outlay, enables the production of a cast product with improved quality. In particular, the strand to be produced should not have a flaky surface or deep imperfections, which may require pretreatment of the strand surface before further processing.
Das Verfahren soll im übrigen in erster Linie die Verarbeitung von Stahl ermöglichen ; es kann jedoch auch ohne weiteres bei der Herstellung von Strängen aus anderen Metallen Verwendung finden.The process is primarily intended to enable the processing of steel; however, it can easily be used in the manufacture of strands from other metals.
Die gestellte Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a method with the features of claim 1.
Das erfindungsgemäße Verfahren verläßt danach den bereits längere Zeit von der Fachwelt beschrittenen Weg, trotz Inkaufnahme eines erhöhten wirtschaftlichen und technischen Aufwandes mit einer intermittierenden Strangabzugsbewegung zu arbeiten.The method according to the invention then leaves the path which experts have taken for a long time to work with an intermittent strand withdrawal movement despite the increased economic and technical effort involved.
Derartige Verfahren, die mit einer ortsfesten oder einer zusätzlich bewegten Horizontal-Stranggießkokille arbeiten, sind beispielsweise aus der DE-OS 31 48 033 bzw. 31 37119 bekannt. Das Verfahren der erstgenannten Druckschrift benötigt dabei eine Abzieheinrichtung, die in außerordentlich kurzer Aufeinanderfolge ein gezieltes ruckartiges Beschleunigen und Abbremsen des Strangs ermöglicht, und zwar bei einem unter Umständen beachtlichen Abstand der Abzieheinrichtung von der Horizontal-Stranggießkokille.Such methods, which work with a stationary or an additionally moved horizontal continuous casting mold, are known for example from DE-OS 31 48 033 or 31 37119. The method of the first-mentioned publication requires a pulling device which enables the strand to be accelerated and braked in a jerky manner in an extremely short succession, with a possibly considerable distance between the pulling device and the horizontal continuous casting mold.
Das Verfahren der zweitgenannten Druckschrift arbeitet zwar ohne Rückstoß des Strangs in Richtung auf die Horizontal-Stranggießkokille ; es ist jedoch insofern mit einem erheblichen Mehraufwand verbunden, als zusätzlich, beispielsweise durch Bewegen der Horizontal-Stranggießkokille, stoßartige Impulse in Gießrichtung auf den Strang übertragen werden. Sofern das bekannte Verfahren mit Überlagerung der Strangabziehund Impulsbewegung arbeitet, weist die Horizontal-Stranggießkokille keine Voreilung mehr auf. Die Angaben über den bei der Impulserzeugung zurückzulegenden Weg lassen, abgesehen von den im übrigen vorhandenen Unterschieden, nicht erkennen, daß die Einhaltung eines Stauchweges in der Größenordnung allenfalls von einigen zehntel Millimetern von Bedeutung ist.The method of the second-mentioned document works without recoil of the strand in the direction of the horizontal continuous casting mold; however, it involves considerable additional effort in that, in addition, for example by moving the horizontal continuous casting mold, shock-like impulses are transmitted to the strand in the casting direction. If the known method works with superimposition of the strand pulling and impulse movement, the horizontal continuous casting mold no longer leads. Apart from the other differences, the information about the path to be covered when generating the impulse does not indicate that compliance with a compression path of the order of magnitude of at most a few tenths of a millimeter is important.
Nach alledem kann dem Stand der Technik keine Anregung dafür entnommen werden, abweichend von der eingeschlagenen Entwicklungsrichtung bei der Lösung der gestellten Aufgabe auf das erfindungsgemäße Verfahren mit oszillierender Horizontal-Stranggießkokille und kontinuierlicher Strangabzugsbewegung zurückzugehen.After all, no suggestion can be taken from the prior art to go back to the method according to the invention with oscillating horizontal continuous casting mold and continuous strand withdrawal movement, deviating from the development direction chosen in solving the task.
Im einzelnen geht das erfindungsgemäße Verfahren davon aus, daß sich eine gute Strangoberfläche nur dann erzielen läßt, wenn die Geschwindigkeit der Horizontal-Stranggießkokille in Gießrichtung größer ist als die Gießgeschwindigkeit (entsprechend der Strangabzugsgeschwindigkeit). Dieser Forderung läßt sich dadurch Rechnung tragen, daß durch gegenseitige Abstimmung der drei veränderlichen Größen - Kokillen-Oszillationsfrequenz, Kokillenhub und Gießgeschwindigkeit - für die durchschnittliche Voreilung der Stranggießkokille bezüglich des Strangs ein Mindestwert von 2hr entsprechend etwa 0,64 eingehalten wird. Darüber hinaus werden die drei erwähnten Größen so gewählt, daß der Stauchweg, d. h. die während der Voreilung der Stranggießkokille bezüglich des Strangs in Gießrichtung zurückgelegte Wegstrecke, höchstens 1 mm, vorzugsweise sogar nur 0,1 bis 0,5 mm, beträgt. Das Verfahren wird im übrigen so ausgeführt, daß die Kokillen-Oszillationsfrequenz einen Mindestwert von etwa 100/min. nicht unterschreitet.In particular, the method according to the invention assumes that a good strand surface can only be achieved if the speed of the horizontal continuous casting mold in the casting direction is greater than the casting speed (corresponding to the strand withdrawal speed). This requirement can be taken into account in that by mutually coordinating the three variable variables - mold oscillation frequency, mold stroke and casting speed - a minimum value of 2hr is maintained for the average advance of the continuous casting mold with respect to the strand, corresponding to approximately 0.64. In addition, the three sizes mentioned are chosen so that the compression path, ie the distance covered during the advance of the continuous casting mold with respect to the strand in the casting direction, is at most 1 mm, preferably even only 0.1 to 0.5 mm. The process is otherwise carried out so that the mold oscillation frequency has a minimum value of about 100 / min. not less.
Die Voreilung der Horizontal-Stranggießkokille bezüglich der Bewegung des Strangs in Gießrichtung hat zur Folge, daß das bei einem Oszillationsvorgang gebildete Strangschalen-Zusatzelement auf die zuvor gebildete Strangschale aufgeschoben wird und dort verschweißt. Angesichts der bereits erwähnten Kolbenwirkung der Horizontal-Stranggießkokille mit vorgeschaltetem Abreißring wird die Einhaltung eines sehr kleinen Stauchweges vorgeschlagen. Falls dieser zu große Werte annimmt, besteht die Gefahr, daß sich das aufgeschobene Strangschalen-Zuwachselement unter oder über die nachfolgende Strangschale schiebt ; dies führt zu einer unerwünsch ten Schuppenbildung an der Strangoberfläche und/oder zu einer Beschädigung des aus Keramikwerkstoff bestehenden Abreißrings.The advance of the horizontal continuous casting mold with respect to the movement of the strand in the casting direction has the consequence that the strand shell additional element formed during an oscillation process is pushed onto the previously formed strand shell and welded there. In view of the already mentioned piston action of the horizontal continuous casting mold with an upstream tear-off ring, adherence to a very small compression path is suggested. If this assumes values that are too large, there is a risk that the pushed-on strand shell growth element will slide under or over the subsequent strand shell; this leads to an undesirable scale formation on the strand surface and / or damage to the tear-off ring made of ceramic material.
Mit der Einhaltung eines Mindestwertes der Kokillen-Oszillationsfrequenz schließlich soll erreicht werden, daß das während eines Oszillationsvorgangs gebildete Strangschalen-Zuwachselement nur eine geringe Durcherstarrung und demzufolge nach dem Lösen vom Abreißring keine tiefgehende Fehlstelle aufweist.With the observance of a minimum value of the mold oscillation frequency, it should finally be achieved that the strand-shell growth element formed during an oscillation process has only a low degree of solidification and, consequently, has no deep defect after being detached from the tear-off ring.
Falls, beispielsweise durch eine Veränderung der Gießgeschwindigkeit, die Horizontal-Stranggießkokille keine Voreilung mehr aufweist, besteht, anders als beim Stranggießen mit einer Vertikal-Stranggießkokille eine erhebliche Durchbruchsgefahr. Falls bei voreilender Horizontal-Stranggießkokille der Stauchweg einen zu großen Wert aufweist, läßt sich kein Strang mit einer ausreichenden Oberflächenqualität herstellen.If, for example due to a change in the casting speed, the horizontal continuous casting mold no longer leads, there is a considerable risk of breakthrough, unlike in the case of continuous casting with a vertical continuous casting mold. If the compression path is too large for a leading horizontal continuous casting mold, a strand with a sufficient surface quality cannot be produced.
Vorzugsweise wird bei dem Verfahren für die Stranggießkokille eine Mindest-Oszillationsfrequenz von 120/min. verwendet (Anspruch 2).In the process for the continuous casting mold, a minimum oscillation frequency of 120 / min is preferred. used (claim 2).
Der während eines Oszillationsvorgangs ausgeführte Kokillenhub soll höchstens 6 mm, vorzugsweise höchstens 5 mm, betragen (Anspruch 3). Zweckmäßigerweise wird das erfindungsgemäße Verfahren in der Weise ausgefährt, daß bei der Mindest-Oszillationsfrequenz gemäß Anspruch 2 der Kokillenhub sogar nur auf 2 bis 4 mm eingestellt wird.The mold stroke carried out during an oscillation process should be at most 6 mm, preferably at most 5 mm (claim 3). The method according to the invention is expediently carried out in such a way that the mold stroke is even set to only 2 to 4 mm at the minimum oscillation frequency.
Durch die Einhaltung einer bestimmten Mindest-Oszillationsfrequenz im Zusammenhang mit einem geringen Kokillenhub läßt sich die Gefahr der Bildung tiefgehender Fehlstellen an der Strangoberfläche erheblich herabsetzen.By adhering to a certain minimum oscillation frequency in connection with a small mold stroke, the risk of the formation of deep defects on the strand surface can be considerably reduced.
Damit während des Gießvorgangs - abgesehen allenfalls vom Zeitraum unmittelbar nach Gießbeginn und unmittelbar vor Gießende - Betriebsbedingungen vorliegen, welche die Herstellung eines Stranges ausreichender Qualität ermöglichen, wird weiterhin vorgeschlagen, die drei veränderlichen Größen Kokillen-Oszillationsfrequenz, Kokillenhub und Gießgeschwindigkeit in Abhängigkeit von letzterer derart aufeinander abzustimmen, daß sowohl der Mindestwert der Voreilung als auch der Höchstwert des Stauchweges eingehalten wird ; dies läßt sich dadurch erreichen, daß die betreffenden Größen über einen Prozeßrechner vorgegeben werden.So that during the casting process - apart from at most the period immediately after the start of casting and immediately before the end of casting - there are operating conditions that enable the production of a strand of sufficient quality, it is further proposed that the three variable sizes of mold oscillation frequency, mold stroke and casting speed depend on each other in such a way to coordinate that both the minimum value of the advance and the maximum value of the compression path are observed; this can be achieved by specifying the relevant quantities via a process computer.
Die zur Durchführung des erfindungsgemäßen Verfahrens geeignete Horizontal-Stranggießkokille weist demzufolge einen Oszillationsantrieb auf, der hinsichtlich Kokillen-Oszillationsfrequenz und Kokillenhub in dem erforderlichen Umfang einstellbar ist ; darüber hinaus muß der zugehörige Strangabzugsantrieb in der Weise ausgebildet sein, daß sich die die Gießgeschwindigkeit darstellende Strangabzugsgeschwindigkeit in einem ausreichend weiten Bereich verändern läßt.The horizontal continuous casting mold which is suitable for carrying out the method according to the invention consequently has an oscillation drive which can be set to the required extent with regard to the mold oscillation frequency and mold stroke; moreover, the associated strand take-off drive must be designed in such a way that the strand take-off speed representing the casting speed can be varied within a sufficiently wide range.
Beim Horizontal-Stranggießen beispielsweise von Knüppeln und Vorblöcken aus Stahl kommen zur Zeit Gießgeschwindigkeiten von ca. 1,5 bis ca. 4 m/min. in Betracht.In the case of horizontal continuous casting, for example of billets and blooms made of steel, casting speeds of about 1.5 to about 4 m / min are currently being achieved. into consideration.
Die für die Durchführung des erfindungsgemäßen Verfahrens und den damit hergestellten Strang wesentlichen Größen sind aus der Zeichnung entnehmbar, in welcher der Weg s [cm] über der Zeit t [sec] aufgetragen ist.The quantities essential for carrying out the method according to the invention and the strand produced therewith can be seen from the drawing, in which the path s [cm] is plotted against the time t [sec].
Für eine Horizontal-Stranggießkokille mit Sinus-Oszillation gelten die folgenden Beziehungen, wobei mit f die Kokillen-Oszillationsfrequenz, mit H der Kokillenhub = Weg zwischen zwei Umkehrpunkten und mit Vo die Gießgeschwindigkeit = Strangabzugsgeschwindigkeit bezeichnet ist.The following relationships apply to a horizontal continuous casting mold with sinus oscillation, f denoting the mold oscillation frequency, H the mold stroke = path between two reversal points and V o the casting speed = strand withdrawal speed.
Vom Strang zurückgelegter Weg :
Kokillenweg :
Kokillengeschwindigkeit :Mold speed:
Relativer Weg Strang/Kokille :
Weg zwischen Minimum und Maximum von Srel (Zugweg) :
Weg zwischen Maximum und Minimum von Srel (Stauchweg) :
Bei einer Gießgeschwindigkeit Vo = 1,5 m/min., einem Kokillenhub von 5 mm und einer Kokillen-Oszillationsfrequenz von 100/min. liegen die Voreilung und der Stauchweg in der geforderten Größenordnung.With a casting speed V o = 1.5 m / min., A mold stroke of 5 mm and a mold oscillation frequency of 100 / min. the advance and the compression path are in the required range.
Würde man die Kokillen-Oszillationsfrequenz unter 100/min. absenken, so ergäbe sich für den Strang keine Stauchung mehr. Eine Erhöhung der Kokillen-Oszillationsfrequenz auf 150/min. bei sonst unveränderten Verhältnissen hätte bereits zur Folge, daß der Stauchweg einen Wert oberhalb der Mindestgrenze von 1 mm annähme.Would the mold oscillation frequency be below 100 / min. lower, there would be no more compression for the strand. An increase in the mold oscillation frequency to 150 / min. with otherwise unchanged conditions, the upsetting path would already have a value above the minimum limit of 1 mm.
Bei der bereits erwähnten Größe der Gießgeschwindigkeit Vo und einem Kokillenhub von 4 bzw. 2 mm lassen sich die geforderten Werte für die Voreilung und den Stauchweg nur dann einhalten, wenn die Kokillen-Oszillationsfrequenz zwischen 120 bis 200/min. liegt bzw. mehr als 250/min. beträgt.With the previously mentioned size of the casting speed V o and a mold stroke of 4 or 2 mm, the required values for the advance and the compression path can only be maintained if the mold oscillation frequency is between 120 to 200 / min. is or more than 250 / min. is.
Eine Erhöhung der Gießgeschwindigkeit auf 2,0 m/min. hat bei einer Einstellung des Kokillenhubes auf 6 bzw. 5 bzw. 4 bzw. 2 mm zur Folge, daß die Kokillen-Oszillationsfrequenz in dem Bereich zwischen etwa 110 bis 150 bzw. 130 bis 200 bzw. 160 bis 270 bzw. oberhalb von 320/min. liegen muß.An increase in the casting speed to 2.0 m / min. If the mold stroke is set to 6 or 5 or 4 or 2 mm, the mold oscillation frequency is in the range between approximately 110 to 150 or 130 to 200 or 160 to 270 or above 320 / min. must lie.
Die Ausführungsbeispiele lassen erkennen, daß bei einer vorgegebenen Gießgeschwindigkeit (entsprechend der Strangabzugsgeschwindigkeit) mit Rücksicht auf die geforderte Größenordnung der Voreilung und des Stauchweges die anzustrebenden höhreren Werte der Kokillen-Oszillationsfrequenz dann erreichbar sind, wenn mit einem verhältnismäßig geringen Kokillenhub gearbeitet wird. Eine Verkleinerung des Kokillenhubes führt außerdem dazu, daß sich der geeignete Bereich der Kokillen-Oszillationsfrequenz vergrößert.The exemplary embodiments show that at a given casting speed (corresponding to the strand withdrawal speed), taking into account the required magnitude of the advance and the compression path, the higher values of the mold oscillation frequency to be aimed for can be achieved if a relatively small mold stroke is used. A reduction in the mold stroke also leads to an increase in the suitable range of the mold oscillation frequency.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84113517T ATE26549T1 (en) | 1983-12-01 | 1984-11-09 | PROCESS FOR OSCILLATING A RIGID HORIZONTAL CONTINUOUS MOLD FOR METALS, ESPECIALLY STEEL. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3343479 | 1983-12-01 | ||
| DE3343479A DE3343479C1 (en) | 1983-12-01 | 1983-12-01 | Process for oscillating a rigid horizontal continuous casting mold for metals, especially steel |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0144795A2 EP0144795A2 (en) | 1985-06-19 |
| EP0144795A3 EP0144795A3 (en) | 1985-07-10 |
| EP0144795B1 true EP0144795B1 (en) | 1987-04-15 |
Family
ID=6215765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84113517A Expired EP0144795B1 (en) | 1983-12-01 | 1984-11-09 | Method of oscillating a horizontal continuous-casting mould for metals, especially steel |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4602671A (en) |
| EP (1) | EP0144795B1 (en) |
| JP (1) | JPS60133962A (en) |
| AT (1) | ATE26549T1 (en) |
| AU (1) | AU565781B2 (en) |
| CA (1) | CA1254714A (en) |
| DE (1) | DE3343479C1 (en) |
| ES (1) | ES537955A0 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3526935A1 (en) * | 1985-07-27 | 1987-02-05 | Mannesmann Ag | METHOD FOR THE HORIZONTAL CONTINUOUS CASTING OF METALS, ESPECIALLY STEEL |
| JP2663126B2 (en) * | 1987-12-22 | 1997-10-15 | 川崎製鉄株式会社 | Two-way drawing type horizontal continuous casting method |
| DE58901200D1 (en) * | 1988-01-28 | 1992-05-27 | Clecim Sa | METHOD AND DEVICE FOR OSCILLING A STEEL MOLDING CHOCOLATE. |
| DE19854329A1 (en) * | 1998-11-25 | 2000-05-31 | Schloemann Siemag Ag | Method for oscillating a continuous casting mold using variable oscillation parameters |
| FR2835208B3 (en) * | 2002-01-28 | 2003-12-26 | Usinor | CONTINUOUS CASTING PROCESS FOR METALS IN OSCILLATING LINGOTIERE |
| US9247736B2 (en) | 2005-12-14 | 2016-02-02 | 3M Innovative Properties Company | Antimicrobial adhesive films |
| EP2905093B1 (en) * | 2014-02-07 | 2018-08-29 | SMS Concast AG | Mould assembly for continuous casting of metallic products |
| CN103894573B (en) * | 2014-03-20 | 2016-05-25 | 攀钢集团攀枝花钢钒有限公司 | Reduce the control method of conticaster bleed-out |
| CN111644586B (en) * | 2020-06-11 | 2021-06-29 | 中冶南方连铸技术工程有限责任公司 | Method for determining optimal vibration parameters of crystallizer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3857437A (en) * | 1973-03-22 | 1974-12-31 | Technicon Instr | Method and apparatus for continuously casting metals |
| DE2737835A1 (en) * | 1977-08-23 | 1979-03-08 | Krupp Gmbh | HORIZONTAL CONTINUOUS CASTING PLANT FOR COPPER AND COPPER ALLOYS |
| DE2805277A1 (en) * | 1978-02-08 | 1979-08-09 | Kabel Metallwerke Ghh | Continuous casting of metals - in horizontal mould oscillating with casting ladle at specified speed relative to strand |
| JPS57187145A (en) * | 1981-05-12 | 1982-11-17 | Kawasaki Steel Corp | Continuous casting method for ingot of superior surface characteristic |
| DE3137119C2 (en) * | 1981-09-18 | 1983-07-28 | Mannesmann AG, 4000 Düsseldorf | Method and device for the horizontal continuous casting of metals, in particular steel |
| DE3148033A1 (en) * | 1981-12-04 | 1983-06-09 | Realid GmbH, 4050 Mönchengladbach | Withdrawal machine for a horizontal continuous casting installation |
-
1983
- 1983-12-01 DE DE3343479A patent/DE3343479C1/en not_active Expired
-
1984
- 1984-11-09 AT AT84113517T patent/ATE26549T1/en not_active IP Right Cessation
- 1984-11-09 EP EP84113517A patent/EP0144795B1/en not_active Expired
- 1984-11-26 ES ES537955A patent/ES537955A0/en active Granted
- 1984-11-27 AU AU35928/84A patent/AU565781B2/en not_active Ceased
- 1984-11-27 CA CA000468665A patent/CA1254714A/en not_active Expired
- 1984-11-30 JP JP59252090A patent/JPS60133962A/en active Granted
- 1984-12-03 US US06/677,376 patent/US4602671A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0558825B2 (en) | 1993-08-27 |
| ATE26549T1 (en) | 1987-05-15 |
| EP0144795A3 (en) | 1985-07-10 |
| JPS60133962A (en) | 1985-07-17 |
| EP0144795A2 (en) | 1985-06-19 |
| DE3343479C1 (en) | 1984-08-23 |
| ES8600095A1 (en) | 1985-10-01 |
| AU565781B2 (en) | 1987-09-24 |
| ES537955A0 (en) | 1985-10-01 |
| AU3592884A (en) | 1985-06-06 |
| US4602671A (en) | 1986-07-29 |
| CA1254714A (en) | 1989-05-30 |
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