EP2620236A2 - Flow-through mould for the strand casting of a strand, especially with billets or bloom profile - Google Patents
Flow-through mould for the strand casting of a strand, especially with billets or bloom profile Download PDFInfo
- Publication number
- EP2620236A2 EP2620236A2 EP12196675.8A EP12196675A EP2620236A2 EP 2620236 A2 EP2620236 A2 EP 2620236A2 EP 12196675 A EP12196675 A EP 12196675A EP 2620236 A2 EP2620236 A2 EP 2620236A2
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- EP
- European Patent Office
- Prior art keywords
- inner tube
- continuous casting
- casting mold
- sleeve
- cooling
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- 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.)
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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
- B22D11/055—Cooling the moulds
-
- 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
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
-
- 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
- B22D11/043—Curved moulds
Definitions
- From the GB 2 177 331 A is a continuous casting mold for a strand with billet or billet profile known, wherein the inner tube has a plurality of cooling slots in the longitudinal direction of the mold.
- the disadvantage of this is that the rigidity of the inner tube is reduced due to the cooling slots and the cooling fluid that can flow between the inner tube and the outer tube, the cooling slots flows through insufficiently.
- the desired effect of the cooling slots namely to increase the cooling performance of the mold by bringing the cooling fluid to the molten steel in the mold cavity, is achieved only to an insufficient degree.
- the font can not be removed.
- From the DE 10 2005 059 712 A1 is a continuous mold with an inner tube and a plurality of water baffles known.
- the inner tube has a plurality of cooling slots in the longitudinal direction of the mold, whereby the heat removal from the melt is increased. By the Wasserleitbleche a sufficient flow through the cooling slots is ensured.
- a disadvantage of this solution is that the rigidity of the structural unit, consisting of the slotted inner tube and the sleeve, is greatly reduced compared to an unslotted inner tube.
- the object of the invention is to overcome the disadvantages of the prior art and to provide a continuous casting mold, which allows a higher cooling capacity and in which the mold has a high rigidity.
- the cuff which completely encloses the inner tube in a normal plane to the longitudinal axis, and the cuff by joining (eg by gluing, soldering or Welding) is connected to the inner tube, the inner tube, so that the structural unit, consisting of the slotted inner tube and the sleeve, at least not significantly lower stiffness.
- the structural unit consisting of the slotted inner tube and the sleeve, at least not significantly lower stiffness.
- the casting speed can be increased, so that it is possible to further increase the casting speed in a continuous casting machine.
- the length of the cooling slots which is typically in the range of the meniscus of the liquid steel, preferably extends over 20% to 100% of the total length of the inner tube.
- the cuff is split, with one part of the cuff against another part of the cuff Cuff is formed braced.
- the clamping force for example via the biasing force or the tightening torque of a screw, which braces one part against another part of the sleeve, can be easily adjusted.
- the assembly or disassembly of the sleeve is simplified with the inner tube.
- the continuous casting mold on the lower end face has a connection for introducing the cooling fluid into the cooling jacket and on the upper end side has a connection for carrying out the cooling fluid from the cooling jacket.
- This embodiment has the advantage over lateral connections that the cooling fluid flows through the mold along the entire longitudinal extent.
- the inner tube Since the inner circumferential surface of the inner tube is exposed to high temperature loads and to increase the heat dissipation through the inner tube, it is advantageous if the inner tube of a copper alloy (optionally with a coating of a hard, high temperature resistant material, see, for example http: // en. wikipedia.org / wiki / cermet ).
- the cuff be detachable, e.g. is connected to the inner tube via at least one connecting element such as a screw connection.
- the inner tube it is of course also possible for the inner tube to be non-releasably connected to the cuff, e.g. by soldering, welding or gluing.
- the collar In order to redirect the flow of cooling fluid safely from the cooling jacket into the cooling slots, it is advantageous for the collar to be sealed on its outer circumferential surface (For example, a so-called O-ring). This prevents leakage of the cooling fluid between the sleeve and the outer tube.
- a split cuff it is advantageous to make the cuff split in a plane passing through the longitudinal axis of the inner tube.
- the continuous casting mold according to the invention is equally applicable to straight tube molds, i. when the inner tube and the outer tube have a straight longitudinal axis, as well as for curved tube molds, i. when the inner tube and the outer tube have a bent longitudinal axis.
- cooling slots it is advantageous if all the cooling slots in a normal plane to the longitudinal axis have a first flow-through surface, when the cooling jacket between the inner tube and the outer tube (ie outside the length range of the inner tube having cooling slots) in a normal plane to Longitudinal axis has a second through-flowable surface, wherein the first flow-through surface is between 50 and 200% of the second permeable surface.
- the hydraulic diameter of the cooling slots substantially equal to the hydraulic diameter of the cooling jacket.
- cooling slots not from the inner tube but from the sleeve.
- the advantage of this is that a smooth inner tube (without cooling slots) can be used. In general, however, it is easier to use the slots, e.g. by milling, to produce from the outer surface of the inner tube.
- the inner tube is preferably made in one piece.
- Such molds are referred to as tube molds.
- the inner tube is preferably formed from a plurality of copper cassette plates.
- the copper cassette plates are flat; often these are - e.g. in molds for thin slabs - curved.
- the meniscus is arranged in the longitudinal region (i.e., in the region of the inner tube with the cooling slots).
- Fig. 1 shows a perspective view of a continuous casting mold 1 according to the invention, which is suitable for the continuous casting of a strand with billet or billet profile of molten steel.
- straight molds were always shown, but the invention is by no means limited thereto and can be applied without restriction even with a bent mold.
- the continuous casting mold 1 has a straight inner tube 2, which has a mold cavity with a billet or pre-block profile which is open on both sides along the longitudinal axis 3.
- the cooling slots 5 in the inner tube 2 and the sleeve 7 are in Fig. 1 covered by the outer tube 8 so that they are not shown.
- the inner tube 2 is divided into its four quadrants, the dividing planes each extending through the longitudinal axis 3.
- the cuff 7 is off Fig. 1 and an undivided variant of the inner tube 2 is shown.
- the inner tube 2 has a plurality of cooling slots 5, which extend parallel to the longitudinal axis 3 over a longitudinal region 6 of the inner tube 2.
- the in Fig. 5 illustrated mold cavity 4 of the mold has a square cross-section of 130 x 130 mm.
- the cooling slots have a width of 10 mm and a depth of 8 mm to the bottom.
- the distance between two cooling slots 5 is 18 mm.
- the thickness of the inner tube is not constant over the longitudinal axis 3 and is between 13 and 15 mm; in the region of the cooling slots 5, the inner tube has a thickness of 13 mm, so that the minimum distance between the mold cavity and the cooling slot is about 5 mm.
- the illustrated sleeve 7 is constructed in one piece and has at the operating temperature he mold between the inner circumferential surface of the sleeve 7 and the outer surface of the inner tube 2 a press fit, so that the weakened by the cooling slots 5 inner tube 2 is supported on the sleeve 7.
- Fig. 3 shows the outer tube 8 of Fig. 1 in a separate presentation. As can be seen in the upper area, the outer tube 8 has a smooth inner circumferential surface.
- Fig. 4 shows an elevation view Fig. 2 .
- Fig. 5 shows an elevation and a floor plan to the continuous mold 1.
- Fig. 6 shows a first sectional view of the continuous mold 1 along the section line BB of Fig. 5 ,
- the inner tube 2 is formed of four quadrants.
- the cooling jacket since most of the cooling fluid water is used, also called water jacket.
- the streamable Surface between the inner tube 2 and the outer tube 8 is approximately 2700 mm 2 here .
- Fig. 7 is a section along the section line CC shown. It can be seen that, on the one hand, the sleeve 7 encloses the inner tube 2 with the cooling slots 5. On the other hand, the sleeve 7 is enclosed by the outer tube 8, so that these three components 2,7,8 mutually support.
- the cooling slots By performing the cooling slots with a semicircular base, excessive notch stresses in the inner tube 2 are avoided.
- the sum of the flow-through surfaces of the cooling slots 5 between the inner tube 2 and the outer tube 8 is approximately 2200 mm 2 here .
- the Fig. 8 shows a section along the section line DD of Fig. 5 .
- FIG. 9 shows a longitudinal section along the section line EE of Fig. 7
- a detail about this is in the FIG. 10 represents enlarged, from which it is apparent how the cooling fluid flows through the cooling jacket substantially from bottom to top, ie opposite to the casting direction which runs vertically from top to bottom.
- the cooling fluid extends vertically upwards until it is deflected by the sleeve 7 into the cooling slots 5.
- the cooling slots 5 In the longitudinal region of the inner tube 2, the cooling slots 5, the fluid flows again substantially vertically upwards, until it again after completion of the sleeve in the original cooling jacket between the inner tube 2 and outer tube 8 is deflected.
- the flow directions of the fluid are shown by arrows 10 in this figure.
- FIGS. 11 to 13 show a half of a machine head for a continuous casting machine for casting a billet or Vorblockstrangs comprising a cooled continuous casting mold 1 which is detachably connected to a lifting table 16, a stationary support structure 15 and an oscillation device for oscillating the lifting table 16 with the mold 1 relative to the support structure 15th ,
- the inner tube 2 of the continuous mold 1 has along at least 90% of the total length of the inner tube 2 cooling slots 5, so that the cooling capacity of the mold is increased due to the small wall thickness between the bottom of the cooling slots 5 and the liquid steel in the mold cavity 4.
- the inner tube 2 is connected at operating temperature of the mold 1 by a press or shrink fit with the sleeve 7.
- the inner tube 2, the sleeve 7, and the outer tube 8 with the water distribution spaces 11a, 11b form an insert (also "cartridge"), which can be easily and quickly replaced.
- the insert is connected to the lifting table 16, which is oscillatable relative to the support structure 15 via at least one articulation lever 14 with an oscillation drive, not shown (for example a hydraulic cylinder, an eccentric shaft, an electric linear drive, etc.).
- an oscillation drive for example a hydraulic cylinder, an eccentric shaft, an electric linear drive, etc.
- the flow direction of a cooling fluid is in FIG. 12 shown in more detail.
- the cooling fluid flows via a flexible connection (not shown) (eg a hose) from the stationary support structure 15 into the water distribution space 11a. From there, the fluid flows in the cooling jacket between the outer tube 8 and the sleeve 7 downwards (arrow 10) and is deflected at the lower end of the mold. After that flows through the cooling water in the cooling slots 5 between the inner tube 2 and the sleeve 7 against the extension direction of the strand upwards (see also Fig. 13 showing the arrangement of the inner tube 2, the sleeve 7 and the outer tube 8) and enters the water distribution chamber 11b at the upper end of the mold 1 after a further deflection. From there, the heated cooling water is discharged from the water distribution space 11b in a manner analogous to introduction into the water distribution space 11a.
- the exploded view in FIG. 14 shows that the above-mentioned insert 17, consisting of the inner tube 2, the sleeve 7, the outer tube 8 and the water distribution chambers 11a, 11b, can be easily removed during mold change or maintenance.
- the insert is removed upwards.
- After installation of a new insert 17 this is fixed with the flange 12 on the lifting table 16, so that the casting operation can be resumed after a short break.
- the inner tube 2 with the cooling slots 5 can be pressed out of the cuff in the workshop and a new inner tube 2 can be used.
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Abstract
Description
Die vorliegende Erfindung betrifft eine Durchlaufkokille zum Stranggießen eines Strangs, insbesondere mit Knüppel- oder Vorblockprofil, aufweisend
- ein Innenrohr, das einen entlang einer Längsachse beidseitig offenen Formhohlraum ausbildet;
- mehrere Kühlschlitze in zumindest einer äußeren Mantelfläche des Innenrohrs, die sich über einen Längenbereich des Innenrohrs parallel zur Längsachse erstrecken;
- eine Manschette, die mehrere Kühlschlitze in der Mantelfläche des Innenrohrs quer zur Längsachse umschließt, sodass ein Kühlfluid in einem Kühlschlitz zwischen dem Innenrohr und der Manschette strömen kann; und
- ein Außenrohr, das das Innenrohr und die Manschette umschließt und fluiddicht abdichtet, sodass sich zwischen dem Innenrohr und dem Außenrohr ein Kühlmantel ausbilden kann.
- an inner tube forming a mold cavity open on both sides along a longitudinal axis;
- a plurality of cooling slots in at least one outer circumferential surface of the inner tube, which extend over a longitudinal region of the inner tube parallel to the longitudinal axis;
- a sleeve which encloses a plurality of cooling slots in the lateral surface of the inner tube transversely to the longitudinal axis, so that a cooling fluid can flow in a cooling slot between the inner tube and the sleeve; and
- an outer tube which encloses the inner tube and the sleeve and seals fluid-tight manner, so that a cooling jacket can form between the inner tube and the outer tube.
Aus der
Wie die Kühlleistung weiter erhöht werden kann, kann der Schrift nicht entnommen werden.As the cooling capacity can be further increased, the font can not be removed.
Aus der
Nachteilig an dieser Lösung ist, dass die Steifigkeit der baulichen Einheit, bestehend aus dem geschlitzten Innenrohr und der Manschette, gegenüber einem ungeschlitzten Innenrohr stark reduziert ist.A disadvantage of this solution is that the rigidity of the structural unit, consisting of the slotted inner tube and the sleeve, is greatly reduced compared to an unslotted inner tube.
Die Aufgabe der Erfindung ist es, die Nachteile des Stands der Technik zu überwinden und eine Durchlaufkokille zu schaffen, die eine höhere Kühlleistung zulässt und bei der die Kokille eine hohe Steifigkeit aufweist.The object of the invention is to overcome the disadvantages of the prior art and to provide a continuous casting mold, which allows a higher cooling capacity and in which the mold has a high rigidity.
Diese Aufgabe wird durch eine Durchlaufkokille der eingangs genannten Art gelöst, bei der die Manschette das Innenrohr in einer Normalebene zur Längsachse vollständig umschließt, und die Manschette durch Fügen mit dem Innenrohr verbunden ist.This object is achieved by a continuous mold of the type mentioned, in which the sleeve completely surrounds the inner tube in a plane normal to the longitudinal axis, and the sleeve is connected by joining with the inner tube.
Durch diese rückblickend betrachtet einfache Modifikation der Kokille wird zum Einen sichergestellt, dass ein Kühlfluid - das vorteilhafterweise die Kokille entgegen der Gießrichtung des Strangs (d.h. im Gegenstrom zum sich ausbildenden Strang, konkret meist von unten nach oben) durchströmt wird - nicht an den Kühlschlitzen vorbeiströmt, sondern mittels der Manschette gezwungen wird, durch die Kühlschlitze zu strömen. Dadurch wird die Kühlleistung der Kokille signifikant erhöht. Zum Anderen versteift die Manschette, die das Innenrohr in einer Normalebene zur Längsachse vollständig umschließt, und die Manschette durch Fügen (z.B. durch Kleben, Löten oder Schweißen) mit dem Innenrohr verbunden ist, das Innenrohr, sodass die bauliche Einheit, bestehend aus dem geschlitzten Innenrohr und der Manschette, zumindest keine signifikant niedrigere Steifigkeit aufweist. Einerseits ergibt sich durch die relativ hohe Steifigkeit kombiniert mit der hohen Kühlleistung der Kokille bei gleicher Gießgeschwindigkeit eine dickere Strangschale, sodass bei gleicher Gießgeschwindigkeit die Betriebssicherheit der Stranggießmaschine erhöht wird. Andererseits kann bei gleicher Soll-Strangdicke die Gießgeschwindigkeit erhöht werden, sodass es möglich ist, die Gießgeschwindigkeit in einer Stranggießmaschine weiter zu steigern. Dies erhöht die Produktivität der Stranggießmaschine bzw. einer Gieß-Walz-Verbundanlage. Beim Fügen wird die äußere Mantelfläche des Innenrohrs mit der inneren Mantelfläche der Manschette verbunden. Der Längenbereich der Kühlschlitze, der sich typischerweise im Bereich des Meniskus des flüssigen Stahls befindet, erstreckt sich vorzugsweise über 20% bis 100% der Gesamtlänge des Innenrohrs.By this retrospectively considered simple modification of the mold is on the one hand ensures that a cooling fluid - which advantageously the mold against the casting direction of the strand (ie in countercurrent to the forming strand, concretely usually from bottom to top) flows through - does not flow past the cooling slots but is forced by the cuff to flow through the cooling slots. As a result, the cooling capacity of the mold is significantly increased. On the other hand stiffens the cuff, which completely encloses the inner tube in a normal plane to the longitudinal axis, and the cuff by joining (eg by gluing, soldering or Welding) is connected to the inner tube, the inner tube, so that the structural unit, consisting of the slotted inner tube and the sleeve, at least not significantly lower stiffness. On the one hand results from the relatively high stiffness combined with the high cooling capacity of the mold at the same casting speed, a thicker strand shell, so at the same casting speed, the reliability of the continuous casting machine is increased. On the other hand, with the same target strand thickness, the casting speed can be increased, so that it is possible to further increase the casting speed in a continuous casting machine. This increases the productivity of the continuous casting machine or of a cast-rolled composite plant. When joining the outer circumferential surface of the inner tube is connected to the inner circumferential surface of the sleeve. The length of the cooling slots, which is typically in the range of the meniscus of the liquid steel, preferably extends over 20% to 100% of the total length of the inner tube.
Bei einer vorteilhaften Ausführungsform, die insbesondere für eine einstückig ausgeführte Kokille (z.B. eine sogenannte Rohrkokille mit Knüppel- oder Vorblockprofil) geeignet ist, ist die Manschette einstückig ausgeführt, wobei entweder
- das Innenrohr mit der Manschette bei der Betriebstemperatur der Durchlaufkokille eine Presspassung ausbildet; oder
- das Innenrohr bzw. eine Kupferkassettenplatte des Innenrohrs stoffschlüssig (z.B. durch Kleben, Löten oder Schweißen) mit der Manschette verbunden ist. Durch die Presspassung oder die Fügeverbindung zwischen dem Innenrohr und der Manschette wird die Steifigkeit der baulichen Einheit, bestehend aus dem geschlitzten Innenrohr und der Manschette, durch die innige Verbindung zwischen den Mantelflächen des Innenrohrs und der Manschette stark erhöht.
- the inner tube forms an interference fit with the sleeve at the operating temperature of the continuous casting mold; or
- the inner tube or a copper cassette plate of the inner tube is materially connected (eg by gluing, soldering or welding) to the cuff. By the interference fit or the joint connection between the inner tube and the sleeve, the rigidity of the structural unit, consisting of the slotted inner tube and the sleeve, greatly increased by the intimate connection between the lateral surfaces of the inner tube and the sleeve.
Alternativ dazu ist die Manschette geteilt ausgeführt, wobei ein Teil der Manschette gegen einen anderen Teil der Manschette verspannbar ausgebildet ist. Dabei kann die Spannkraft, z.B. über die Vorspannkraft bzw. das Anzugsdrehmoment einer Schraube, die einen Teil gegen einen anderen Teil der Manschette verspannt, einfach eingestellt werden. Außerdem wird die Montage bzw. Demontage der Manschette mit dem Innenrohr vereinfacht.Alternatively, the cuff is split, with one part of the cuff against another part of the cuff Cuff is formed braced. In this case, the clamping force, for example via the biasing force or the tightening torque of a screw, which braces one part against another part of the sleeve, can be easily adjusted. In addition, the assembly or disassembly of the sleeve is simplified with the inner tube.
Um eine einfache Zufuhr und Abfuhr des Kühlfluids zu erlauben, ist es vorteilhaft, wenn die Durchlaufkokille auf der unteren Stirnseite einen Anschluss zum Einführen des Kühlfluids in den Kühlmantel und auf der oberen Stirnseite einen Anschluss zum Ausführen des Kühlfluids aus dem Kühlmantel aufweist. Diese Ausführungsform hat gegenüber seitlichen Anschlüssen den Vorteil, dass das Kühlfluid die Kokille entlang der gesamten Längserstreckung durchströmt.In order to allow a simple supply and removal of the cooling fluid, it is advantageous if the continuous casting mold on the lower end face has a connection for introducing the cooling fluid into the cooling jacket and on the upper end side has a connection for carrying out the cooling fluid from the cooling jacket. This embodiment has the advantage over lateral connections that the cooling fluid flows through the mold along the entire longitudinal extent.
Da die innere Mantelfläche des Innenrohrs hohen Temperaturbelastungen ausgesetzt ist und um die Wärmeabfuhr durch das Innenrohr zu erhöhen, ist es vorteilhaft, wenn das Innenrohr aus einer Kupferlegierung (gegebenenfalls mit einer Beschichtung aus einem harten, hochtemperaturfesten Material, siehe z.B. http://en.wikipedia.org/wiki/Cermet) besteht.Since the inner circumferential surface of the inner tube is exposed to high temperature loads and to increase the heat dissipation through the inner tube, it is advantageous if the inner tube of a copper alloy (optionally with a coating of a hard, high temperature resistant material, see, for example http: // en. wikipedia.org / wiki / cermet ).
Es ist zweckmäßig, die Manschette und das Außenrohr aus Stahl zu fertigen.It is expedient to manufacture the sleeve and the outer tube made of steel.
Da das Innenrohr einem Verschleiß unterworfen ist, ist es vorteilhaft, dass die Manschette lösbar, z.B. über zumindest ein Verbindungselement wie eine Schraubverbindung, mit dem Innenrohr verbunden ist. Dadurch ist die Wiederverwendung der Manschette nach einem Austausch des Innenrohrs möglich. Alternativ ist es natürlich ebenfalls möglich, dass Innenrohr mit der Manschette nicht lösbar zu verbinden, z.B. durch verlöten, verschweißen oder verkleben.Since the inner tube is subject to wear, it is advantageous that the cuff be detachable, e.g. is connected to the inner tube via at least one connecting element such as a screw connection. As a result, the reuse of the sleeve is possible after an exchange of the inner tube. Alternatively, it is of course also possible for the inner tube to be non-releasably connected to the cuff, e.g. by soldering, welding or gluing.
Um den Strom des Kühlfluids sicher vom Kühlmantel in die Kühlschlitze umzulenken, ist es vorteilhaft, dass die Manschette auf deren äußerer Mantelfläche eine Abdichtung (z.B. einen sogenannten O-Ring) aufweist. Dadurch wird eine Leckage des Kühlfluids zwischen der Manschette und dem Außenrohr verhindert.In order to redirect the flow of cooling fluid safely from the cooling jacket into the cooling slots, it is advantageous for the collar to be sealed on its outer circumferential surface (For example, a so-called O-ring). This prevents leakage of the cooling fluid between the sleeve and the outer tube.
Bei einer geteilten Manschette ist es vorteilhaft, die Manschette in einer Ebene, die durch die Längsachse des Innenrohrs verläuft, geteilt auszuführen.In a split cuff, it is advantageous to make the cuff split in a plane passing through the longitudinal axis of the inner tube.
Die erfindungsgemäße Durchlaufkokille ist gleichermaßen anwendbar für gerade Rohrkokillen, d.h. wenn das Innenrohr und das Außenrohr eine gerade Längsachse aufweisen, als auch für gebogene Rohrkokillen, d.h. wenn das Innenrohr und das Außenrohr eine gebogene Längsachse aufweisen.The continuous casting mold according to the invention is equally applicable to straight tube molds, i. when the inner tube and the outer tube have a straight longitudinal axis, as well as for curved tube molds, i. when the inner tube and the outer tube have a bent longitudinal axis.
Bezüglich der Wahl der Dimensionen der Kühlschlitze ist es vorteilhaft, wenn sämtliche Kühlschlitze in einer Normalebene zur Längsachse eine erste durchströmbare Fläche aufweisen, wenn der Kühlmantel zwischen dem Innenrohr und dem Außenrohr (d.h. außerhalb des Längenbereichs des Innenrohrs, der Kühlschlitze aufweist) in einer Normalebene zur Längsachse eine zweite durchströmbare Fläche aufweist, wobei die erste durchströmbare Fläche zwischen 50 und 200% der zweiten durchströmbaren Fläche beträgt. Alternativ wäre es ebenfalls möglich, den hydraulischen Durchmesser der Kühlschlitze im Wesentlichen gleich zum hydraulischen Durchmesser des Kühlmantels zu wählen.With regard to the choice of the dimensions of the cooling slots, it is advantageous if all the cooling slots in a normal plane to the longitudinal axis have a first flow-through surface, when the cooling jacket between the inner tube and the outer tube (ie outside the length range of the inner tube having cooling slots) in a normal plane to Longitudinal axis has a second through-flowable surface, wherein the first flow-through surface is between 50 and 200% of the second permeable surface. Alternatively, it would also be possible to choose the hydraulic diameter of the cooling slots substantially equal to the hydraulic diameter of the cooling jacket.
Grundsätzlich wäre es möglich, die Kühlschlitze nicht aus dem Innenrohr sondern aus der Manschette herauszuarbeiten. Vorteilhaft daran ist, dass ein glattes Innenrohr (ohne Kühlschlitze) verwendet werden kann. Im Allgemeinen ist es jedoch einfacher, die Schlitze, z.B. durch Fräsen, aus der äußeren Mantelfläche des Innenrohrs herzustellen.In principle, it would be possible to work out the cooling slots not from the inner tube but from the sleeve. The advantage of this is that a smooth inner tube (without cooling slots) can be used. In general, however, it is easier to use the slots, e.g. by milling, to produce from the outer surface of the inner tube.
Bei einer Durchlaufkokille zum Stranggießen eines Strangs mit Knüppel- oder Vorblockprofil ist das Innenrohr vorzugsweise einstückig ausgeführt. Derartige Kokillen werden als Rohrkokillen bezeichnet.In a continuous casting mold for continuously casting a strand with billet or billet profile, the inner tube is preferably made in one piece. Such molds are referred to as tube molds.
Bei einer Durchlaufkokille zum Stranggießen eines Strangs mit Brammen- oder Dünnbrammenprofil wird das Innenrohr vorzugsweise aus mehreren Kupferkassettenplatten gebildet.In a continuous casting mold for continuous casting of a strand with slab or thin slab profile, the inner tube is preferably formed from a plurality of copper cassette plates.
Hierbei ist es nicht zwingend notwendig, dass die Kupferkassettenplatten eben sind; oftmals sind diese - z.B. bei Kokillen für Dünnbrammen - gekrümmt ausgeführt.It is not absolutely necessary that the copper cassette plates are flat; often these are - e.g. in molds for thin slabs - curved.
Da die flüssige Metallschmelze im Bereich des Meniskus die höchste Temperatur aufweist, ist es vorteilhaft, wenn im Betrieb der Stranggießmaschine der Meniskus im Längenbereich (d.h. im Bereich des Innenrohrs mit den Kühlschlitzen) angeordnet ist.Since the liquid molten metal has the highest temperature in the area of the meniscus, it is advantageous if, during operation of the continuous casting machine, the meniscus is arranged in the longitudinal region (i.e., in the region of the inner tube with the cooling slots).
Weitere Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung nicht einschränkender Ausführungsbeispiele, wobei auf die folgenden Figuren Bezug genommen wird, die Folgendes zeigen:
- Fig 1
- eine perspektivische Darstellung einer erfindungsgemäßen Durchlaufkokille
- Fig 2
- eine perspektivische Darstellung eines Innenrohrs mit einer Manschette nach
Fig 1 - Fig 3
- eine perspektivische Darstellung des Außenrohrs nach
Fig 1 - Fig 4
- ein Aufriss zu
Fig 2 - Fig 5
- ein Auf- und ein Grundriss zu
Fig 1 - Fig 6
- eine geschnittene Darstellung entlang der Schnittlinie B-B der
Fig 5 - Fig 7
- eine geschnittene Darstellung entlang der Schnittlinie C-C der
Fig 5 - Fig 8
- eine geschnittene Darstellung entlang der Schnittlinie D-D der
Fig 5 - Fig 9
- ein Schnitt entlang der Schnittlinie E-E der
Fig 7 - Fig 10
- eine Darstellung der Strömungsrichtungen beim Durchströmen eines Kühlschlitzes
- Fig 11
- eine perspektivische Darstellung eines halben Maschinenkopfs für eine Knüppel-/Vorblock Stranggießmaschine
- Fig 12
- eine Aufrissdarstellung zu
Fig 11 - Fig 13
- ein Schnitt entlang der Linie A-A von
Fig 12 . - Fig 14
- eine Explosionsdarstellung zu
Fig 11 .
- Fig. 1
- a perspective view of a continuous casting mold according to the invention
- Fig. 2
- a perspective view of an inner tube with a collar after
Fig. 1 - Fig. 3
- a perspective view of the outer tube after
Fig. 1 - Fig. 4
- an outline too
Fig. 2 - Fig. 5
- an up and a floor plan too
Fig. 1 - Fig. 6
- a sectional view along the section line BB of
Fig. 5 - Fig. 7
- a sectional view along the section line CC of
Fig. 5 - Fig. 8
- a sectional view along the section line DD of
Fig. 5 - FIG. 9
- a section along the section line EE of
Fig. 7 - FIG. 10
- a representation of the flow directions when flowing through a cooling slot
- Fig. 11
- a perspective view of a half-machine head for a billet / billet continuous casting machine
- FIG. 12
- an elevation view too
Fig. 11 - Fig. 13
- a section along the line AA of
FIG. 12 , - FIG. 14
- an exploded view too
Fig. 11 ,
Die
Die Durchlaufkokille 1 weist ein gerades Innenrohr 2 auf, das einen entlang der Längsachse 3 beidseitig offenen Formhohlraum mit Knüppel- oder Vorblockprofil aufweist. Die Kühlschlitze 5 im Innenrohr 2 und die Manschette 7 werden in
In
In der
Die
Die
Die
Das Innenrohr 2 der Durchlaufkokille 1 weist entlang von zumindest 90% der Gesamtlänge des Innenrohrs 2 Kühlschlitze 5 auf, sodass die Kühlleistung der Kokille aufgrund der geringen Wandstärke zwischen dem Grund der Kühlschlitze 5 und dem flüssigem Stahl im Formhohlraum 4 gesteigert wird. Um die Steifigkeit der Kokille zu erhöhen und eine gezielte Führung des Kühlwassers durch die Kühlschlitze zu gewährleisten, ist das Innenrohr 2 bei Betriebstemperatur der Kokille 1 durch einen Press- bzw. Schrumpfsitz mit der Manschette 7 verbunden. Das Innenrohr 2, die Manschette 7, und das Außenrohr 8 mit den Wasserverteilräumen 11a, 11b bilden einen Einsatz (auch "Cartridge") aus, der einfach und schnell getauscht werden kann.The
Der Einsatz ist mit dem Hubtisch 16 verbunden, der über zumindest einen Anlenkhebel 14 mit einem nicht dargestellten Oszillationsantrieb (z.B. ein Hydraulikzylinder, eine Exzenterwelle, ein elektrischer Linearantrieb...) gegenüber der Stützkonstruktion 15 oszillierbar ist.The insert is connected to the lifting table 16, which is oscillatable relative to the
Die Durchströmrichtung eines Kühlfluids ist in
Bezüglich der Oszillationseinrichtung mit den vier Federbändern 13, die den Hubtisch 16 ringförmig umschließen, wird auf die
Die Explosionsdarstellung in
Obwohl die Erfindung im Detail durch die bevorzugten Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.While the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
- 11
- Durchlaufkokilleended mold
- 22
- Innenrohrinner tube
- 33
- Längsachselongitudinal axis
- 44
- Formhohlraummold cavity
- 55
- Kühlschlitzcooling slot
- 66
- Längenbereichlength range
- 77
- Manschettecuff
- 88th
- Außenrohrouter tube
- 99
- Dichtungpoetry
- 1010
- Strömungsrichtung KühlfluidFlow direction of cooling fluid
- 11a,11b11a, 11b
- WasserverteilraumWater distribution space
- 1212
- Befestigungsflanschmounting flange
- 1313
- Federbandspring band
- 1414
- AnlenkhebelFeedback lever
- 1515
- Stützkonstruktionsupport structure
- 1616
- HubtischLift table
- 1717
- Einsatzcommitment
Claims (15)
dadurch gekennzeichnet, dass die Manschette (7) das Innenrohr (2) in einer Normalebene zur Längsachse (3) vollständig umschließt, und die Manschette (7) durch Fügen mit dem Innenrohr (2) verbunden ist.
characterized in that the sleeve (7) the inner tube (2) in a normal plane to the longitudinal axis (3) completely encloses, and the sleeve (7) is connected by joining with the inner tube (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50014/2012A AT512433B1 (en) | 2012-01-30 | 2012-01-30 | CONTINUOUS COIL FOR THE CONTINUOUS CASTING OF A STRING WITH A BILL OR PRE-BLOCK PROFILE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2620236A2 true EP2620236A2 (en) | 2013-07-31 |
EP2620236A3 EP2620236A3 (en) | 2017-07-19 |
Family
ID=47357991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12196675.8A Withdrawn EP2620236A3 (en) | 2012-01-30 | 2012-12-12 | Flow-through mould for the strand casting of a strand, especially with billets or bloom profile |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2620236A3 (en) |
CN (1) | CN103223476B (en) |
AT (1) | AT512433B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016178153A1 (en) * | 2015-05-05 | 2016-11-10 | Danieli & C. Officine Meccaniche S.P.A. | Crystallizer for continuous casting |
CN109604545A (en) * | 2018-12-17 | 2019-04-12 | 阳春新钢铁有限责任公司 | A kind of diagonal dissection type cooling jacket |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109093084B (en) * | 2018-09-29 | 2020-03-31 | 东北大学 | Method for producing continuous casting sheet billet |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2423285A1 (en) * | 1978-04-17 | 1979-11-16 | Siderurgie Fse Inst Rech | COOLING SHIRT FOR CONTINUOUS METAL CASTING LINGOTIER |
DE3411359A1 (en) * | 1984-03-28 | 1985-10-31 | Mannesmann AG, 4000 Düsseldorf | CONTINUOUS CHOCOLATE FOR ROUND OR BLOCK CROSS SECTIONS, ESPECIALLY FOR THE POURING OF LIQUID STEEL |
FI852493L (en) * | 1985-06-24 | 1986-12-25 | Outokumpu Oy | KOKILL. |
CH685432A5 (en) * | 1992-06-11 | 1995-07-14 | Concast Standard Ag | Mold for the continuous casting of metal, particularly of steel in billet and Vorblockquerschnitte. |
LU88393A1 (en) * | 1993-08-20 | 1995-03-01 | Wurth Paul Sa | Continuous casting ingot mold |
US5771958A (en) * | 1995-09-14 | 1998-06-30 | Ag Industries, Inc. | Mold for continuous casting system |
DE19859040A1 (en) * | 1998-12-21 | 2000-06-29 | Km Europa Metal Ag | Mold tube and method for recalibrating a mold tube |
JP3930761B2 (en) * | 2002-04-17 | 2007-06-13 | 株式会社神戸製鋼所 | Tube type continuous casting mold |
JP4202718B2 (en) * | 2002-10-28 | 2008-12-24 | 株式会社神戸製鋼所 | High frequency electromagnetic casting mold for continuous casting of molten metal |
DE50300582D1 (en) * | 2003-04-16 | 2005-06-30 | Concast Holding Ag Zuerich | Tubular mold for continuous casting |
DE102006001812A1 (en) * | 2005-12-05 | 2007-06-06 | Km Europa Metal Ag | Mold for continuous casting of metal |
DE102005059712A1 (en) * | 2005-12-12 | 2007-06-21 | Km Europa Metal Ag | mold |
ATE552930T1 (en) * | 2007-06-04 | 2012-04-15 | Concast Ag | MOLD FOR CONTINUOUS CASTING BLOCKS, SLAMS OR BILLETS |
-
2012
- 2012-01-30 AT ATA50014/2012A patent/AT512433B1/en not_active IP Right Cessation
- 2012-12-12 EP EP12196675.8A patent/EP2620236A3/en not_active Withdrawn
-
2013
- 2013-01-30 CN CN201310035431.7A patent/CN103223476B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016178153A1 (en) * | 2015-05-05 | 2016-11-10 | Danieli & C. Officine Meccaniche S.P.A. | Crystallizer for continuous casting |
CN109604545A (en) * | 2018-12-17 | 2019-04-12 | 阳春新钢铁有限责任公司 | A kind of diagonal dissection type cooling jacket |
Also Published As
Publication number | Publication date |
---|---|
EP2620236A3 (en) | 2017-07-19 |
CN103223476B (en) | 2016-03-02 |
AT512433A1 (en) | 2013-08-15 |
CN103223476A (en) | 2013-07-31 |
AT512433B1 (en) | 2017-08-15 |
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