EP1103321B1 - Strand guiding means in a vertical-curved continuous casting plant - Google Patents
Strand guiding means in a vertical-curved continuous casting plant Download PDFInfo
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- EP1103321B1 EP1103321B1 EP00123616A EP00123616A EP1103321B1 EP 1103321 B1 EP1103321 B1 EP 1103321B1 EP 00123616 A EP00123616 A EP 00123616A EP 00123616 A EP00123616 A EP 00123616A EP 1103321 B1 EP1103321 B1 EP 1103321B1
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- 238000009749 continuous casting Methods 0.000 title claims description 24
- 238000005452 bending Methods 0.000 claims abstract description 54
- 230000007704 transition Effects 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1282—Vertical casting and curving the cast stock to the horizontal
Definitions
- the invention relates to a strand guide by a conversion of an existing Arc bending system emerged vertical bending continuous casting with a straight mold and a vertical bending upstream vertical Route and subordinate horizontal route, comprising a turning zone; a transitional straightening zone; a main radius guide zone; a Transition Endrichtzone.
- Circular arc continuous casting with curved molds have long been known and were executed worldwide. With the tendency to develop thin slab continuous casting plants with thin slab dimensions approximately between 20 and 150 mm thick and up to 3500 mm wide resulted in a significantly greater risk that with the pouring stream introduced impurities such as slag and gas bubbles be introduced into the liquid core of the strand and not more Float to the pouring mirror. Also the further economically interesting improvement of continuous casting with increased casting speed provides a Danger to the purity of the cast product.
- the conversion should be done in such a way that here, namely when replacing the conventional arc casting machine the appropriate dimensions as well as the finishing of the continuous casting machine can be maintained.
- the document DE-AS 1 433 022 describes a method and a device for continuous casting of metal, in which the strand with a liquid Kem in the Horizontal is bent and straightened, with straightening gradual.
- the rollers used for staged straightening are driven.
- the resulting in straightening with liquid Kem large Strains in the solidified edge zone diminished and the overall height of Facilities reduced.
- the document EP 0 934 786 A1 describes a method for continuous casting of metal and a continuous casting plant provided therefor with a straight, vertically oriented mold and subsequent removal of the straight strand formed in the mold.
- the straight strand is first bent in a bending zone along a transition curve in a circular arc with a radius R end , guided along a circular arc guide with the radius R end and then straightened in a Endrichtzone along a transition curve and then discharged via an approximately horizontal linear guide.
- the emerging from the straight mold straight strand is bent in at least one bending zone along a transition curve in a first small radius R min having circular arc, bent in at least one downstream straightening zone along a transition curve in a circular arc shape with a larger second radius R end than the first radius which second radius R end preferably corresponds to the circular arc shape of an initially existing continuous casting machine with a curved mold.
- Document AT No. 373 518 discloses a strand guide for a continuous casting plant for continuous casting of molten metal.
- the strand guide should be designed so that the rollers of a subsequent to a transition curve Strand guide section less stressed by the springback of the strand are, as before, and that the pullout forces for the strand reduced are.
- the curvature of the transition curve is greater in its end region as the curvature of the strand guide section following the transition curve.
- the curvature of the transition curve in its end region is preferred chosen to be larger than the measure of the elastic portion of the deformation Curvature of the transition curve following the strand guide section, such that the strand after exiting the strand guide section with the transition curve has exactly that curvature that the subsequent strand guide section has at its beginning part.
- the invention has the object underlying, a strand guide by a conversion from a circular arc plant emerged vertical bending continuous casting with a straight mold and one of the vertical bending line upstream vertical route and Subordinate horizontal distance specify their vertical turn-off distance using as much as possible parts or elements and / or Modules of the umbilical strand guide with curved mold at approximately unchanged Height and orientation of the continuous casting machine for tundish in unchanged hall building is produced, and under strict attention the maximum permissible expansion or compression values of the strand shell in all areas of curvature of the strand guide, as well as in a to increase the Casting speed suitable design.
- the first bending zone with at least a first bending area comparatively intensive turning and the second bending zone a subsequent bending region of comparatively gentle turning is formed, wherein the strand guide in the first bending zone, starting from the infinite radius of the vertical route, with a curvature of a series of continuously decreasing radii R1 i and in the second, subsequent bending zone with a first bending zone comparatively less intense curvature (R2 i ) is bent, and that the transition straightening zone, which forms the transition between the bending zones and the main radius guide zone, has a continuous curvature with increasing length of the radii forming them .DELTA.R.
- the inventive design of the converted strand guide is achieved that in the area of intense turning, where there is a curvature from the infinite radius of the straight line and ever smaller radii is bent, the inner deformation of the still soft strand shell to the individual bending points does not exceed the maximum permissible value of 0.25%, and that in the area of gentle turning, where the strand shell subjected to smaller bending deformations, the strand shell a recovery phase passes through, where in the bending points strand shell extensions to a maximum 0.02% are allowed.
- the transition finish zone advantageously follows the Shape of a clothoid or is like the bending areas of the bending zone or the transition zone Part of a clothoid.
- the figure shows an embodiment of the radii configuration of the strand guide a Vertikatabbiege continuous casting foundry produced by conversion from a circular arc plant.
- This comprises a straight mold 1 with a vertical bending section 2 upstream vertical route 3 and with a downstream horizontal Strekke 4, comprising a turn zone 5, 6; a transition straightening zone 7; a Main radius guide zone 8; and a transition finish zone 9.
- the first turn zone 5 is formed with a comparatively more intense turn, and with a subsequent second turn zone 6 with comparatively gentler turns.
- the strand guide is bent in the first region 5, starting from the infinite radius of the vertical path 3, with a curvature of a series of continuously decreasing radii R1 i and in the second, adjoining region 6 with a comparatively less intense curvature R2 i to the first region 5 ,
- the radii configuration is chosen so that the inner deformation of the strand shell at successive bending points with continuously decreasing radii in the first region 5 of the bending zone 5, 6 the maximum permissible value of Does not exceed 0.25%.
- the strain of the strand shell is due to the invention selected radii configuration minimized.
- a continuation of the radii configuration to the main radius guiding zone 8 provides that in the bending sector 9 continuously increasing radii to R are endlessly provided, through which the bending sector 9 is bent to the transition into the horizontal Strekke 4 steadily.
- An essential embodiment of the radii configuration according to the invention is characterized in that the forming the main part of the vertical bending line 2 Main radius guide zone 8 from a partially shortened otherwise Regarding type and radii of curvature unchanged part of the rebuilt Arc system exists.
- the vertical bending line 2 is as a composite curve with different partial lengths of different Clothoids for the bending areas 5, 6, the transition zone 7 as well as for the transition end-facing zone 9 and formed from a circular arc 8, wherein the Circular arc 8 of the main radius guide zone of the existing circular arc plant equivalent.
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Abstract
Description
Die Erfindung betrifft eine Strangführung einer durch Umbau aus einer vorhandenen Kreisbogen-Anlage hervorgegangenen Vertikalabbiege-Stranggießanlage mit einer geraden Kokille und einer der Vertikalabbiegestrecke vorgeordneten vertikalen Strecke sowie nachgeordneten horizontalen Strecke, umfassend eine Abbiegezone; eine Übergangs-Richtzone; eine Hauptradius-Führungszone; eine Übergangs-Endrichtzone.The invention relates to a strand guide by a conversion of an existing Arc bending system emerged vertical bending continuous casting with a straight mold and a vertical bending upstream vertical Route and subordinate horizontal route, comprising a turning zone; a transitional straightening zone; a main radius guide zone; a Transition Endrichtzone.
Bei Modemisierungsvorhaben an bestehenden Stranggußanlagen ist es für den Reinheitsgrad der vergossenen Stränge bspw. aus Stahl von Vorteil, einen Umbau von Kreisbogenanlagen in Vertikal-Abbiegeanlagen durchzuführen.In modemization projects on existing continuous casting plants, it is for the Purity of the cast strands eg. Of steel advantage, a conversion to perform circular arches in vertical turn-off systems.
Kreisbogen-Stranggießanlagen mit Bogenkokillen sind seit langem bekannt und wurden weltweit ausgeführt. Mit der Tendenz zur Entwicklung von Dünnbrammen-Stranggießanlagen mit Dünnbrammen-Abmessungen etwa zwischen 20 und 150 mm Dicke und bis zu 3500 mm Breite ergab sich eine erheblich größere Gefahr, dass mit dem Gießstrahl eingebrachte Verunreinigungen wie Schlacke und Gasbläschen in den flüssigen Kern des Stranges eingebracht werden und nicht mehr zum Gießspiegel aufschwimmen. Auch die weitere wirtschaftlich interessante Verbesserung von Stranggießverfahren mit erhöhter Gießgeschwindigkeit stellt eine Gefahr für die Reinheit des Gießprodukts dar. Circular arc continuous casting with curved molds have long been known and were executed worldwide. With the tendency to develop thin slab continuous casting plants with thin slab dimensions approximately between 20 and 150 mm thick and up to 3500 mm wide resulted in a significantly greater risk that with the pouring stream introduced impurities such as slag and gas bubbles be introduced into the liquid core of the strand and not more Float to the pouring mirror. Also the further economically interesting improvement of continuous casting with increased casting speed provides a Danger to the purity of the cast product.
Es kommt hinzu, daß in einer Bogenkokille die Strömungsverhältnisse der Schmelze weniger gleichförmig und infolgedessen weniger günstig sind, als bei einer geraden Kokille. Infolgedessen kommt es bei einer Bogenkokille und insbesondere beim Stranggießen von Dünnbrammen zu Störungen des Schalenwachstums. Die vorgenannten Gründe haben in letzter Tendenz dazu geführt, Stranggießanlagen mit Bogenkokillen in Stranggießanlagen mit gerader Kokille umzubauen. Eine Möglichkeit, die hierbei anfallenden Umbaukosten in noch vertretbaren Grenzen zu halten, ergibt sich durch möglichst weitgehende Verwendung der ursprünglichen Strangführung der Kreisbogenanlage im Bogenbereich der neuen Vertikal-Abbiegeanlage. Dabei sollten bestehende Teile und Konstruktionselemente der ursprünglichen Strangführung im Bogenbereich der neuen Vertikal-Abbiegeanlage integriert werden.It should be added that in a curved mold the flow conditions of Melt less uniform and consequently less favorable than at a straight mold. As a result, it comes in a bow mold and in particular in the continuous casting of thin slabs disturbances of the shell growth. The above reasons have led in recent tendency to Continuous casting plants with curved molds in continuous casting plants with straight mold rebuild. One possibility, the resulting conversion costs in still reasonable To keep limits results from the widest possible use the original strand guide of the circular arc plant in the bow area the new vertical turning system. It should include existing parts and construction elements the original strand guide in the bow area of the new vertical turn-off system to get integrated.
Weiterhin sollte der Umbau in einer solchen Weise erfolgen, daß hierbei, nämlich beim Ersatz der herkömmlichen Bogen-Gießmaschine die entsprechenden Abmessungen sowie die Adjustage zur Stranggießmaschine erhalten bleiben können.Furthermore, the conversion should be done in such a way that here, namely when replacing the conventional arc casting machine the appropriate dimensions as well as the finishing of the continuous casting machine can be maintained.
Um insbesondere die Forderung nach einer Verbesserung der metallurgischen Situation zu berücksichtigen, mußte die ursprünglich gebogene Kokille durch eine gerade Kokille ersetzt werden, der eine genügend lange vertikale Strecke zum Aufsteigen von oxidischen oder gasförmigen Einschlüssen nachgeordnet werden konnte. Um diese der Vertikalabbiegestrecke vorzuordnende vertikale Strecke sowie eine dieser nachzuordnende horizontale Strecke im Umbau-Konzept integrieren zu können, und dies, ohne wesentliche Änderung von Höhe und Länge der Stranggießmaschine war ein neues Konzept der Radien-Konfiguration der Strangführung erforderlich, wobei die Strangführung von der geraden senkrechten Form in eine spezielle Bogenform mit horizontalem Endstück umgerüstet werden mußte. In particular the demand for an improvement of the metallurgical To consider the situation, the originally bent mold had to be replaced by a just mold to be replaced, which has a sufficiently long vertical distance to Upgrades are followed by oxide or gaseous inclusions could. To this the Vertical Abbiegestrecke vorzuordnende vertical distance and integrate one of these to be reordered horizontal track in the conversion concept to be able to do this, without significant change in the height and length of the Continuous casting machine was a new concept of radii configuration of the Strand guide required, with the strand guide from the straight vertical Form can be converted into a special arch shape with horizontal tail had to.
Stranggießanlagen, bei welchen der Strang noch mit einem flüssigen Kem aus der vertikalen Gießrichtung während der Erstarrung in die Waagerechte abgebogen und gerade gerichtet wird, sind bekannt.Continuous casting plants, in which the strand still with a liquid Kem from the vertical casting direction during solidification bent into the horizontal and being judged are known.
Das Dokument DE-AS 1 433 022 beschreibt ein Verfahren und eine Vorrichtung zum Stranggießen von Metall, bei dem der Strang mit einem flüssigen Kem in die Waagerechte abgebogen und gerade gerichtet wird, wobei das Geraderichten stufenweise erfolgt. Bei der hierzu vorgesehenen Vorrichtung zur Durchführung des Verfahrens werden die zum stufenweisen Richten verwendeten Rollen angetrieben. Damit werden die beim Richten mit flüssigem Kem entstehenden großen Beanspruchungen in der erstarrten Randzone vermindert und die Bauhöhe von Anlagen reduziert.The document DE-AS 1 433 022 describes a method and a device for continuous casting of metal, in which the strand with a liquid Kem in the Horizontal is bent and straightened, with straightening gradual. In the case of the device provided for implementation of the method, the rollers used for staged straightening are driven. Thus, the resulting in straightening with liquid Kem large Strains in the solidified edge zone diminished and the overall height of Facilities reduced.
Das Dokument EP 0 934 786 A1 beschreibt ein Verfahren zum Stranggießen von Metall und eine hierfür vorgesehene Stranggießanlage mit einer geraden, vertikal ausgerichteten Kokille und nachfolgendem Abziehen des in der Kokille gebildeten geraden Stranges. Dabei wird der gerade Strang zunächst in einer Biegezone entlang einer Übergangskurve in eine Kreisbogenform mit einem Radius Rend gebogen, entlang einer Kreisbogenführung mit dem Radius Rend geführt und anschließend in einer Endrichtzone entlang einer Übergangskurve gerade gerichtet und danach über eine etwa horizontale Geradführung ausgefördert.The document EP 0 934 786 A1 describes a method for continuous casting of metal and a continuous casting plant provided therefor with a straight, vertically oriented mold and subsequent removal of the straight strand formed in the mold. In this case, the straight strand is first bent in a bending zone along a transition curve in a circular arc with a radius R end , guided along a circular arc guide with the radius R end and then straightened in a Endrichtzone along a transition curve and then discharged via an approximately horizontal linear guide.
Um ausgehend von einer Stranggießanlage mit einer Bogenkokille eine Anlage mit einer geraden Kokille zu schaffen, wird gemäß EP 0 934 786 A1 wie folgt vorgegangen:To start from a continuous casting with a curved mold a plant with a straight mold, the procedure according to EP 0 934 786 A1 is as follows:
Der aus der geraden Kokille austretende gerade Strang wird in mindestens einer Biegezone entlang einer Übergangskurve in eine einen ersten kleinen Radius Rmin aufweisende Kreisbogenform gebogen, in mindestens einer nachgeordneten Richtzone entlang einer Übergangskurve in eine Kreisbogenform mit größerem zweiten Radius Rend als der erste Radius gebogen, welcher zweiter Radius Rend vorzugsweise dem der Kreisbogenform einer ursprünglich vorhandenen Stranggießanlage mit Bogenkokille entspricht.The emerging from the straight mold straight strand is bent in at least one bending zone along a transition curve in a first small radius R min having circular arc, bent in at least one downstream straightening zone along a transition curve in a circular arc shape with a larger second radius R end than the first radius which second radius R end preferably corresponds to the circular arc shape of an initially existing continuous casting machine with a curved mold.
Das Dokument AT Nr. 373 518 offenbart eine Strangführung für eine Stranggießanlage zum kontinuierlichen Gießen von Metallschmelze. Die Strangführung soll so ausgelegt sein, dass die Rollen eines an eine Übergangskurve anschließenden Strangführungsabschnitts durch die Rückfederung des Stranges weniger beansprucht sind, als bisher, und dass die Ausziehkräfte für den Strang vermindert sind. Hierzu ist die Krümmung der Übergangskurve in ihrem Endbereich größer als die Krümmung des der Übergangskurve nachfolgenden Strangführungsabschnittes. Die Krümmung der Übergangskurve in ihrem Endbereich ist vorzugsweise um das Maß des elastischen Anteils der Verformung größer gewählt als die Krümmung des der Übergangskurve nachfolgenden Strangführungsabschnittes, so dass der Strang nach Austritt aus dem Strangführungsabschnitt mit der Übergangskurve genau jene Krümmung aufweist, die der nachfolgende Strangführungsabschnitt an seinem Anfangsteil aufweist.Document AT No. 373 518 discloses a strand guide for a continuous casting plant for continuous casting of molten metal. The strand guide should be designed so that the rollers of a subsequent to a transition curve Strand guide section less stressed by the springback of the strand are, as before, and that the pullout forces for the strand reduced are. For this purpose, the curvature of the transition curve is greater in its end region as the curvature of the strand guide section following the transition curve. The curvature of the transition curve in its end region is preferred chosen to be larger than the measure of the elastic portion of the deformation Curvature of the transition curve following the strand guide section, such that the strand after exiting the strand guide section with the transition curve has exactly that curvature that the subsequent strand guide section has at its beginning part.
Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Strangführung einer durch Umbau aus einer Kreisbogen-Anlage hervorgegangenen Vertikalabbiege-Stranggießanlage mit einer geraden Kokille und einer der Vertikalabbiegestrecke vorgeordneten vertikalen Strecke sowie nachgeordneten horizontalen Strecke anzugeben, deren Vertikal-Abbiegestrecke unter möglichst weitgehender Verwendung von Teilen bzw. Elementen und/oder Modulen der umzubauenden Strangführung mit Bogenkokille bei annähernd unveränderter Bauhöhe und Orientierung der Stranggießmaschine zum Tundish im unveränderten Hallengebäude herstellbar ist, und zwar unter strikter Beachtung der maximal zulässigen Dehnungs- bzw. Stauchungswerte der Strangschale in allen Krümmungsbereichen der Strangführung, sowie in einer zur Erhöhung der Gießgeschwindigkeit geeigneten Bauart.Based on the aforementioned prior art, the invention has the object underlying, a strand guide by a conversion from a circular arc plant emerged vertical bending continuous casting with a straight mold and one of the vertical bending line upstream vertical route and Subordinate horizontal distance specify their vertical turn-off distance using as much as possible parts or elements and / or Modules of the umbilical strand guide with curved mold at approximately unchanged Height and orientation of the continuous casting machine for tundish in unchanged hall building is produced, and under strict attention the maximum permissible expansion or compression values of the strand shell in all areas of curvature of the strand guide, as well as in a to increase the Casting speed suitable design.
Zur Lösung der Aufgabe wird bei einer Strangführung einer durch Umbau aus einer
Kreisbogen-Anlage hervorgegangenen Vertikalabbiege-Stranggießanlage der
im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung vorgeschlagen,
dass die erste Biegezone mindestens mit einem ersten Biegebereich vergleichsweise
intensiveren Abbiegens und die zweite Biegezone mit einem anschließenden
Biegebereich vergleichsweise sanfteren Abbiegens ausgebildet ist, wobei die
Strangführung in der ersten Biegezone, ausgehend vom unendlichen Radius der
vertikalen Strecke, mit einer Krümmung aus einer Folge stetig kleiner werdenden
Radien R1i und in der zweiten, daran anschließenden Biegezone mit einer zur ersten
Biegezone vergleichsweise weniger intensiven Krümmung (R2i) abgebogen
ist, und dass die Übergangs-Richtzone, welche den Übergang zwischen den Biegezonen
und der Hauptradius-Führungszone bildet, eine stetige Krümmung mit
steigender Länge der sie bildenden Radien ΔR aufweist.To solve the problem is proposed in a strand management of a resulting from reconstruction of a circular arc plant vertical bending continuous casting referred to in the preamble of
Mit der erfindungsgemäßen Ausbildung der umgebauten Strangführung wird erreicht, dass im Bereich des intensiven Abbiegens, dort, wo eine Krümmung mit vom unendlichen Radius der geraden Strecke und stetig kleiner werdenden Radien gebogen wird, die Innendeformation der noch weichen Strangschale an den einzelnen Biegepunkten den maximal zulässigen Wert von 0,25% nicht überschreitet, und dass im Bereich des sanften Abbiegens, dort, wo die Strangschale kleineren Biegedeformationen unterzogen wird, die Strangschale eine Erholungsphase durchläuft, wobei in den Biegepunkten Strangschalendehnungen bis maximal 0,02% zugelassen sind.With the inventive design of the converted strand guide is achieved that in the area of intense turning, where there is a curvature from the infinite radius of the straight line and ever smaller radii is bent, the inner deformation of the still soft strand shell to the individual bending points does not exceed the maximum permissible value of 0.25%, and that in the area of gentle turning, where the strand shell subjected to smaller bending deformations, the strand shell a recovery phase passes through, where in the bending points strand shell extensions to a maximum 0.02% are allowed.
Im Anschluss daran erfolgt ein Übergangsrichten in einem anschließenden Richtsektor der Krümmung zum Anschluß an den weiteren unverändert verwendeten Teil der umzubauenden Strangführung. In dieser Richtzone erfolgt der Richtvorgang mit stetig größer werdenden Radien, wobei auch hier der maximal zulässige Dehnungswert der Strangschale in den Richtpunkten von 0,25% nicht überschritten wird.This will be followed by a referendum in a subsequent judicial sector the curvature used to connect to the other unchanged Part of the string guide to be rebuilt. In this straightening zone, the straightening process takes place with continuously increasing radii, whereby here too the maximum permissible Strain value of the strand shell in the directional points of 0.25% not exceeded becomes.
Besonders vorteilhaft ist die klothoidenförmige Ausbildung der ersten Biegezone und der zweiten Biegezone sowie die klothoidenförmige Ausbildung der Übergangsrichtzone. Auch die Übergangs-Endrichtzone folgt vorteilhafterweise der Form einer Klothoide oder ist wie die Biegebereiche der Biegezone bzw. die Übergangsrichtzone Teil einer Klothoide.Particularly advantageous is the clothoid-shaped design of the first bending zone and the second bending zone as well as the clothoid-shaped formation of the transition directing zone. The transition finish zone advantageously follows the Shape of a clothoid or is like the bending areas of the bending zone or the transition zone Part of a clothoid.
Weitere Ausgestaltungen der Erfindung sind entsprechend den Unteransprüchen vorgesehen.Further embodiments of the invention are according to the subclaims intended.
Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der nachstehenden Erläuterung eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles.Details, features and advantages of the invention will become apparent from the following Explanation of an embodiment shown schematically in the drawing.
Die Figur zeigt ein Ausführungsbeispiel der Radien-Konfiguration der Strangführung einer durch Umbau aus einer Kreisbogen-Anlage hervorgegangenen Vertikatabbiege-Stranggießantage.The figure shows an embodiment of the radii configuration of the strand guide a Vertikatabbiege continuous casting foundry produced by conversion from a circular arc plant.
Diese umfasst eine gerade Kokille 1 mit einer der Vertikalabbiegestrecke 2 vorgeordneten
vertikalen Strecke 3 sowie mit einer nachgeordneten horizontalen Strekke
4, umfassend eine Abbiegezone 5, 6; eine Übergangs-Richtzone 7; eine
Hauptradius-Führungszone 8; und eine Übergangs-Endrichtzone 9.This comprises a
Die erste Abbiegezone 5 ist mit einem vergleichsweise intensiveren Abbiegen, und
mit einer anschließenden zweiten Abbiegezone 6 mit vergleichsweise sanfteren
Abbiegen ausgebildet. Die Strangführung ist im ersten Bereich 5, ausgehend
vom unendlichen Radius der vertikalen Strecke 3, mit einer Krümmung aus
einer Folge stetig kleiner werdenden Radien R1i und im zweiten, daran anschließenden
Bereich 6 mit einer zum ersten Bereich 5 vergleichsweise weniger intensiven
Krümmung R2i gebogen.The
Dabei ist erkennbar, daß die Klothoide aus der geraden vertikalen Strecke 3 mit
stetig zunehmender Krümmung 5 zunächst in den Bereich 6 mit einer sanfteren
Krümmung übergeht und sodann für einen tangentialen Übergang vom letzten
Radius R2i des Bereichs 6 in die Hauptradius-Führungszone 8 mit dem Radius
Rend die Übergangs-Richtzone 7 vorgesehen ist, deren Radius ΔR stetig bis zum
Hauptradius Rend ansteigen.It can be seen that the clothoid from the straight
Die Radien-Konfiguration ist so gewählt, daß die Innendeformation der Strangschale
an einander folgenden Biegepunkten mit stetig kleiner werdenden Radien
im ersten Bereich 5 der Abbiegezone 5, 6 den maximal zulässigen Wert von
0,25% nicht überschreitet.The radii configuration is chosen so that the inner deformation of the strand shell
at successive bending points with continuously decreasing radii
in the
Im Bereich 6 des sanften Abbiegens der Strangschale wird diese in einer Regenerationsphase
nur vergleichsweise geringen Biegedeformationen ausgesetzt. Dabei
werden Strangschalendehnungen bis maximal 0,02 % nicht überschritten.In
Die Übergangs-Richtzone 7, welche den Übergang zwischen der Abbiegezone 5,
6 und der Hauptradius-Führungszone 8 bildet, weist eine stetige Krümmung mit
steigender Länge der sie bildenden Radien ΔR auf, in deren Richtpunkten ebenfalls
der maximal zulässige Dehnungswert der Strangschale von 0,25 % nicht
überschritten wird.The transition straightening zone 7, which is the transition between the
Die Dehnungsbeanspruchung der Strangschale wird infolge der erfindungsgemäß gewählten Radien-Konfiguration minimiert. The strain of the strand shell is due to the invention selected radii configuration minimized.
Eine Fortsetzung der Radien-Konfiguration an die Hauptradius-Führungszone 8
sieht vor, daß im Biegesektor 9 stetig länger werdende Radien bis Rendlos vorgesehen
sind, durch welche der Biegesektor 9 zum Übergang in die horizontale Strekke
4 stetig aufgebogen ist.A continuation of the radii configuration to the main
Eine wesentliche Ausgestaltung der Radien-Konfiguration nach der Erfindung ist
dadurch gekennzeichnet, daß die den Hauptteil der Vertikalabbiegestrecke 2 ausbildende
Hauptradius-Führungszone 8 aus einem teilweise verkürzten ansonsten
bezüglich Bauart und Krümmungsradien unveränderten Teil der umgebauten
Kreisbogen-Anlage besteht.An essential embodiment of the radii configuration according to the invention is
characterized in that the forming the main part of the
Die Vertikalabbiegestrecke 2 ist
als eine zusammengesetzte Kurve mit unterschiedlichen Teillängen aus unterschiedlichen
Klothoiden für die Biegebereiche 5, 6, die Übergangszone 7 sowie für
die Übergangs-Endrichtzone 9 und aus einem Kreisbogen 8 gebildet, wobei der
Kreisbogen 8 der Hauptradius-Führungszone der bestehenden Kreisbogen-Anlage
entspricht.The
Mit einer derartigen Maßnahme werden nicht nur die Umbaukosten minimiert, sondern ebenfalls die in Anspruch genommene Umbauzeit, während welcher die Anlage außer Betrieb ist.Such a measure not only minimizes the conversion costs, but also the conversion time taken during which the Plant is out of service.
Durch erfindungsgemäße Verwendung insbesondere eines teilweise verkürzten, ansonsten bezüglich Bauart und Krümmungsradien unveränderten Teil der umgebauten Kreisbogen-Anlage werden somit nicht nur Material- und Arbeitskosten gespart, sondern die Umbauzeit wird signifikant verkürzt und dadurch die Kosten der betrieblichen Ausfallzeiten drastisch reduziert, was der Ökonomie des Umbaues zugute kommt.By use according to the invention, in particular a partially shortened, otherwise unchanged in terms of design and radii of curvature part of the rebuilt Circular arc plant thus not only material and labor costs saved, but the conversion time is significantly reduced and thereby the costs the operational downtime drastically reduced, reflecting the economics of the remodeling benefits.
Claims (7)
- Strip guide for a vertical bending-away continuous casting plant, which is produced by conversion from an existing arcuate plant, with a straight mould (1) and a vertical path (3), which is arranged upstream of the vertical bending-away path (2), as well as a horizontal path (4) arranged downstream, comprising:in which the first bending zone (5) is constructed with a bending region of comparatively more intensive bending away and the second bending zone (6) with an adjoining bending region of comparatively more gentle bending away, wherein the strip guidance in the first bending zone (8) is bent away, starting from the infinite radius of the vertical path (3), with a curvature composed of a sequence of constantly reducing radii (R1i) and in the second bending zone (6) adjoining thereto with a curvature (R2i) which is less intensive by comparison with the first bending zone (5), and that the transition straightening zone (7) forming the transition between the bending zones (5, 6) and the main radius guide zone (8) has a constant curvature with increasing length of the radii (ΔR) forming it.a first bending zone (5) and a second bending zone (6);a transition straightening zone (7);a main radius guide zone (8);a transition final straightening zone (9);
- Strip guide according to claim 1, characterised in that the first bending zone (5) and the second bending zone (6) as well as the transition straightening zone (7) are each formed to be of clothoidal shape.
- Strip guide according to claim 1 or 2, characterised in that the transition end straightening zone (9) adjoining the main radius guide zone (8) of radius (Rfinite) is bent up with constantly lengthening radii up to (Rinfinite) and opens into the horizontal path (4) in transition-free manner.
- Strip guide according to claim 3, characterised in that the transition end straightening zone (9) is formed to be of clothoidal shape.
- Strip guide according to one or more of claims 1 to 4, characterised in that the first bending zone (5) and the second bending zone (6) as well as the transition straightening zone (7) and the transition final straightening zone (9) follow the form of a clothoid at least in part lengths.
- Strip guide according to one or more of claims 1 to 5, characterised in that the vertical bending-away path (2) is formed as a composite curve with different part lengths (5, 6, 6, 7) of clothoids and an arc (8).
- Strip guide according to one or more of claims 1 to 6, characterised in that the main radius guide zone (8) forming the vertical bending-away path (2) consists of partly shortened parts (5, 6, 7, 9), which are otherwise unchanged with respect to mode of construction and radii of curvature, of the existing curved plant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19956556 | 1999-11-24 | ||
| DE19956556A DE19956556A1 (en) | 1999-11-24 | 1999-11-24 | Radius configuration of the strand guide of a vertical bending continuous caster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1103321A1 EP1103321A1 (en) | 2001-05-30 |
| EP1103321B1 true EP1103321B1 (en) | 2005-03-30 |
Family
ID=7930185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00123616A Expired - Lifetime EP1103321B1 (en) | 1999-11-24 | 2000-10-28 | Strand guiding means in a vertical-curved continuous casting plant |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6607021B1 (en) |
| EP (1) | EP1103321B1 (en) |
| JP (1) | JP5161406B2 (en) |
| AT (1) | ATE291979T1 (en) |
| DE (2) | DE19956556A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7290421B2 (en) * | 2003-07-01 | 2007-11-06 | General Motors Corporation | Variable curvature tube and draw die therefor |
| US20110101630A1 (en) * | 2009-11-04 | 2011-05-05 | Tadashi Sakai | Bend shape for anti-roll bar |
| JP5746803B2 (en) * | 2012-04-06 | 2015-07-08 | 日立建機株式会社 | Drilling bucket |
| DE102013224557A1 (en) * | 2013-11-29 | 2015-06-03 | Sms Siemag Ag | Continuous casting plant and method for continuous casting of a metal strand |
| CN106111930A (en) * | 2016-06-21 | 2016-11-16 | 燕山大学 | A kind of straight mold type caster type curve of omnidistance continuous bend continuous straightening |
| CN117380916B (en) * | 2023-12-08 | 2024-02-23 | 成都利华强磁浮连铸科技有限责任公司 | Magnetic suspension continuous casting system and magnetic suspension continuous casting method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1124450B (en) * | 1960-11-18 | 1962-03-01 | Bergwerksverband Gmbh | Device for supporting the mountain offset in the steep and half-steep storage |
| NL277841A (en) * | 1961-05-04 | |||
| AT331439B (en) * | 1973-07-24 | 1976-08-25 | Voest Ag | STRAND GUIDE FOR A CONTINUOUS CASTING PLANT |
| JPS5180624A (en) * | 1975-01-13 | 1976-07-14 | Nippon Kokan Kk | Haganenorenzokuchuzoho oyobi sonosochi |
| DE3011137B1 (en) * | 1980-03-22 | 1981-08-20 | Mannesmann Demag Ag, 4100 Duisburg | Process for controlling the individual drives of a continuous sheet metal multi-roll machine for metal, esp. for steel, and drive arrangement for it |
| JPS5719144A (en) * | 1980-07-10 | 1982-02-01 | Nippon Steel Corp | Conveying method for high-temperature ingot |
| AT373518B (en) * | 1982-05-18 | 1984-01-25 | Voest Alpine Ag | CONTINUOUS GUIDANCE FOR A CONTINUOUS CASTING PLANT FOR CONTINUOUS CASTING OF METAL MELT |
| US4953614A (en) * | 1987-04-09 | 1990-09-04 | Herbert Lemper | Modular continuous caster |
| JP3091814B2 (en) * | 1994-02-16 | 2000-09-25 | 新日本製鐵株式会社 | Continuous caster with easy model change |
| DE19639297C2 (en) * | 1996-09-25 | 2000-02-03 | Schloemann Siemag Ag | Method and device for high-speed continuous casting plants with a reduction in strand thickness during solidification |
| GB9719318D0 (en) * | 1997-09-12 | 1997-11-12 | Kvaerner Clecim Cont Casting | Improvements in and relating to casting |
| JP4057118B2 (en) * | 1997-12-17 | 2008-03-05 | エス・エム・エス・デマーク・アクチエンゲゼルシャフト | Method for producing thin slabs in a continuous casting facility and continuous casting facility for carrying out this method |
| AT406746B (en) * | 1998-11-06 | 2000-08-25 | Voest Alpine Ind Anlagen | METHOD FOR CONTINUOUS CASTING OF METAL AND CONTINUOUS CASTING MACHINE HERE |
-
1999
- 1999-11-24 DE DE19956556A patent/DE19956556A1/en not_active Withdrawn
-
2000
- 2000-10-28 AT AT00123616T patent/ATE291979T1/en active
- 2000-10-28 DE DE50009906T patent/DE50009906D1/en not_active Expired - Lifetime
- 2000-10-28 EP EP00123616A patent/EP1103321B1/en not_active Expired - Lifetime
- 2000-11-21 JP JP2000354313A patent/JP5161406B2/en not_active Expired - Fee Related
- 2000-11-21 US US09/718,146 patent/US6607021B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE291979T1 (en) | 2005-04-15 |
| JP2001179410A (en) | 2001-07-03 |
| US6607021B1 (en) | 2003-08-19 |
| JP5161406B2 (en) | 2013-03-13 |
| DE19956556A1 (en) | 2001-05-31 |
| DE50009906D1 (en) | 2005-05-04 |
| EP1103321A1 (en) | 2001-05-30 |
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