EP2127781A1 - Method for manufacturing a turbine blade - Google Patents

Method for manufacturing a turbine blade Download PDF

Info

Publication number
EP2127781A1
EP2127781A1 EP08009847A EP08009847A EP2127781A1 EP 2127781 A1 EP2127781 A1 EP 2127781A1 EP 08009847 A EP08009847 A EP 08009847A EP 08009847 A EP08009847 A EP 08009847A EP 2127781 A1 EP2127781 A1 EP 2127781A1
Authority
EP
European Patent Office
Prior art keywords
inner structure
turbine blade
channels
interior structure
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08009847A
Other languages
German (de)
French (fr)
Inventor
Fathi Ahmad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP08009847A priority Critical patent/EP2127781A1/en
Publication of EP2127781A1 publication Critical patent/EP2127781A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/10—Repairing defective or damaged objects by metal casting procedures

Definitions

  • the invention relates to a method for producing a turbine blade. Furthermore, a turbine blade that can be produced by the method and a repair method for this turbine blade are the subject of the invention.
  • This object is achieved by first producing an inner structure of the turbine blade and then encapsulating the inner structure with a sheath to form an outer shape of the turbine blade.
  • the basic idea of the invention is thus first to manufacture the inner structure of the turbine blade in a separate step and then to cast a casing around the inner structure which has the outer shape of the turbine blade.
  • the inventive method makes it possible to produce a turbine blade with a complex internal structure in a particularly simple manner.
  • cooling ducts that have a complex geometry can be manufactured with high precision.
  • the inner structure and the envelope from different materials.
  • they may be formed of various metals and / or alloys. This makes it possible to select the materials so that they are optimally adapted to the requirements of the inner structure or to the envelope.
  • a particularly preferred embodiment provides to make the inner structure of a material with high creep resistance and the sheath of a material with high oxidation resistance.
  • Such a turbine blade has a particularly high durability and resilience.
  • materials of different crystallinity for example, one or more crystalline materials can be used.
  • the inner structure In the manufacture of the inner structure can be formed in this cooling channels. This is particularly easy because the internal structure is easily accessible.
  • the cooling fluid may be, for example, water or air.
  • the cooling fluid cools the internal structure so that it is prevented from damaging it, especially when a refractory encapsulant material is used. In this way, it is above all prevented that the internal structure softens or even melts.
  • the inner structure before encapsulating the inner structure.
  • the masking elements serve to form channels in the enclosure during the casting.
  • channels can also be formed in the enclosure with the masking elements, which channels communicate with cooling channels in the inner structure. It is also possible to form channels with a diffuser opening in the enclosure.
  • Another embodiment provides to cast the inner structure of the turbine blade.
  • the invention also relates to a turbine blade, which can be produced by the method according to the invention.
  • the invention comprises a repair method for the turbine blade.
  • the existing envelope of the turbine blade is first removed from the inner structure. Then, a new enclosure with the outer shape of the turbine blade is poured around the inner structure.
  • the Figures 1 and 2 illustrate a method of manufacturing a turbine blade according to a first embodiment of the invention. It shows FIG. 1 schematically in section an inner structure 1 of a turbine blade 2 to be produced.
  • the inner structure 1 consists of an alloy with high creep resistance and has three cooling channels 3 which extend through the inner structure 2.
  • FIG. 2 shows the turbine blade 2 in the finished state.
  • the inner structure 1 is cast in a casing 4 of an alloy with high oxidation resistance.
  • the inner structure 1 is produced from an alloy with high creep resistance. This can be done for example by machining a blank. Alternatively, the inner structure 1 may also be cast by known methods. In the manufacture of the inner structure, the cooling channels 3 are formed with.
  • the inner structure 1 is arranged in a suitable mold having the negative shape of the turbine blade 2 to be produced. Then, the inner structure 1 in the mold with a melt of the alloy for Encapsulated envelope 4, wherein simultaneously water is passed as cooling fluid through the cooling channels 3, to cool the inner structure 1. After solidification of the Umgussleg réelle last finished turbine blade 2 can be removed from the mold.
  • FIGS. 3 to 5 the production of a turbine blade 5 is shown according to a further embodiment of the method according to the invention. It shows the FIG. 3 schematically in section an inner structure 6 of the turbine blade 5, which has a cooling channel 7 and consists of a first alloy.
  • the inner structure 6 is produced in a first step, for example, by casting it from the first alloy with the aid of a suitable mold. Subsequently, the masking elements 8 are attached to the inner structure 6. Then, the inner structure 6 with the masking elements 8 is inserted into a mold having the negative shape of the turbine blade 5. The mold is filled with a melt of the second alloy, in which case simultaneously a cooling fluid such as air is passed through the cooling channel 7 in order to cool the inner structure 6. After the serving 10 is cooled, the turbine blade 5 is removed from the mold and the masking elements 8 are removed from the enclosure 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

The method comprises manufacturing an interior structure (6) of turbine shovel (5) and then recasting with a cover (10) under formation of an external form of the turbine shovel. The interior structure and the cover are produced from different metal and/or alloys. The interior structure is produced from a material with high creep resistance and the cover is produced from a material with high oxidation stability. Cool channels (7) are formed during the fabrication of the interior structure, which is cooled during the recasting in which the cooling fluid is led by the cool channels. The method comprises manufacturing an interior structure (6) of turbine shovel (5) and then recasting with a cover (10) under formation of an external form of the turbine shovel. The interior structure and the cover are produced from different metal and/or alloys. The interior structure is produced from a material with high creep resistance and the cover is produced from a material with high oxidation stability. Cool channels (7) are formed during the fabrication of the interior structure, which is cooled during the recasting in which the cooling fluid is led by the cool channels. Ceramic masking elements are secured on the interior structure before recasting the interior structure in order to recast the channels in the cover. Channels (9) are formed in the cover with the masking elements and communicate with the cooling channels in the interior structure. The channels are formed with a diffusion opening in the cover. The interior structure is molded. An independent claim is included for a repairing process for the turbine shovel.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Turbinenschaufel. Weiterhin sind eine nach dem Verfahren herstellbare Turbinenschaufel sowie ein Reparaturverfahren für diese Turbinenschaufel Gegenstand der Erfindung.The invention relates to a method for producing a turbine blade. Furthermore, a turbine blade that can be produced by the method and a repair method for this turbine blade are the subject of the invention.

Im Stand der Technik sind Verfahren zur Herstellung von Turbinenschaufeln bekannt, die in ihrem Inneren eine Struktur von Kühlkanälen mit teils komplexer Geometrie aufweisen. Bei diesem Verfahren werden in einer Gussform Kerne angeordnet, um die Kühlkanäle in der Turbinenschaufel auszubilden, wenn die Form mit einer Schmelze des Gussmaterials gefüllt wird. Die Kerne müssen nach dem Erkalten des Gussmaterials aufwendig entfernt werden. Ein derartiges Verfahren ist beispielsweise in der US 5,296,308 offenbart.In the prior art methods for the production of turbine blades are known, which have in their interior a structure of cooling channels with partially complex geometry. In this method, cores are placed in a mold to form the cooling channels in the turbine blade when the mold is filled with a melt of the casting material. The cores must be removed after cooling the casting material consuming. Such a method is for example in the US 5,296,308 disclosed.

Bei den bekannten Verfahren ist in vielen Fällen eine umfassende Nachbearbeitung des Gussrohlings notwendig, um insbesondere die Kühlkanäle mit der notwendigen Genauigkeit auszubilden. Dies bedeutet einen erheblichen Aufwand, da die innere Struktur bei der fertigen Turbinenschaufel nur schwer zugänglich ist.In the known methods, a comprehensive post-processing of the cast blank is necessary in many cases, in particular to form the cooling ducts with the necessary accuracy. This means a considerable effort, since the internal structure is difficult to access in the finished turbine blade.

Es ist daher die Aufgabe der vorliegenden Erfindung, ein Verfahren der eingangs genannten Art anzugeben, dass die Herstellung von Turbinenschaufeln mit einer komplexen inneren Struktur vereinfacht.It is therefore an object of the present invention to provide a method of the type mentioned that simplifies the production of turbine blades with a complex internal structure.

Diese Aufgabe wird dadurch gelöst, dass zunächst eine innere Struktur der Turbinenschaufel gefertigt und dann die innere Struktur mit einer Umhüllung unter Bildung einer äußeren Form der Turbinenschaufel umgossen wird.This object is achieved by first producing an inner structure of the turbine blade and then encapsulating the inner structure with a sheath to form an outer shape of the turbine blade.

Grundgedanke der Erfindung ist es somit, zunächst die innere Struktur der Turbinenschaufel in einem separaten Schritt zu fertigen und dann eine Umhüllung um die innere Struktur herum zu gießen, die die äußere Form der Turbinenschaufel aufweist.The basic idea of the invention is thus first to manufacture the inner structure of the turbine blade in a separate step and then to cast a casing around the inner structure which has the outer shape of the turbine blade.

Das erfindungsgemäße Verfahren ermöglicht es, eine Turbinenschaufel mit einer komplexen inneren Struktur auf besonders einfache Weise herzustellen. So können beispielsweise Kühlkanäle, die eine aufwendige Geometrie haben, mit hoher Präzision gefertigt werden.The inventive method makes it possible to produce a turbine blade with a complex internal structure in a particularly simple manner. For example, cooling ducts that have a complex geometry can be manufactured with high precision.

Gemäß einer ersten Ausführungsform der Erfindung ist vorgesehen, die innere Struktur und die Umhüllung aus verschiedenen Materialien herzustellen. Insbesondere können sie aus verschiedenen Metallen und/oder Legierungen ausgebildet werden. Dies ermöglicht es, die Materialien so auszuwählen, dass sie jeweils optimal an die Anforderungen an die innere Struktur bzw. an die Umhüllung angepasst sind. So sieht eine besonders bevorzugte Ausführungsform vor, die innere Struktur aus einem Material mit hoher Kriechfestigkeit und die Umhüllung aus einem Material mit hoher Oxidationsbeständigkeit herzustellen. Eine derartige Turbinenschaufel weist eine besonders hohe Haltbarkeit und Belastbarkeit auf. Ebenso können Materialien unterschiedlicher Kristallinität, beispielsweise ein- oder mehr kristalline Materialien eingesetzt werden.According to a first embodiment of the invention, it is provided to manufacture the inner structure and the envelope from different materials. In particular, they may be formed of various metals and / or alloys. This makes it possible to select the materials so that they are optimally adapted to the requirements of the inner structure or to the envelope. Thus, a particularly preferred embodiment provides to make the inner structure of a material with high creep resistance and the sheath of a material with high oxidation resistance. Such a turbine blade has a particularly high durability and resilience. Likewise, materials of different crystallinity, for example, one or more crystalline materials can be used.

Bei der Fertigung der inneren Struktur können in dieser Kühlkanäle ausgebildet werden. Dies ist besonders einfach möglich, da die innere Struktur gut zugänglich ist.In the manufacture of the inner structure can be formed in this cooling channels. This is particularly easy because the internal structure is easily accessible.

Es ist ebenfalls möglich, die innere Struktur während des Umgießens zu kühlen, indem ein Kühlfluid durch die Kühlkanäle geleitet wird. Bei dem Kühlfluid kann es sich beispielsweise um Wasser oder um Luft handeln. Das Kühlfluid kühlt die innere Struktur, so dass deren Beschädigung insbesondere dann verhindert wird, wenn ein hochschmelzendes Umgussmaterial verwendet wird. Auf diese Weise wird vor allem unterbunden, dass die innere Struktur erweicht oder sogar schmilzt.It is also possible to cool the inner structure during the overmolding by passing a cooling fluid through the cooling channels. The cooling fluid may be, for example, water or air. The cooling fluid cools the internal structure so that it is prevented from damaging it, especially when a refractory encapsulant material is used. In this way, it is above all prevented that the internal structure softens or even melts.

Gemäß einer weiteren Ausführungsform ist vorgesehen, vor dem Umgießen der inneren Struktur Maskierungselemente, insbesondere solche aus Keramik, an der inneren Struktur zu befestigen. Die Maskierungselemente dienen dazu, beim Umgießen Kanäle in der Umhüllung auszuformen. Mit den Maskierungselementen können insbesondere auch Kanäle in der Umhüllung ausgebildet werden, die mit Kühlkanälen in der inneren Struktur kommunizieren. Es ist ebenfalls möglich Kanäle mit einer Diffusoröffnung in der Umhüllung zu formen.According to a further embodiment, it is provided to fasten masking elements, in particular those made of ceramic, to the inner structure before encapsulating the inner structure. The masking elements serve to form channels in the enclosure during the casting. In particular, channels can also be formed in the enclosure with the masking elements, which channels communicate with cooling channels in the inner structure. It is also possible to form channels with a diffuser opening in the enclosure.

Eine weitere Ausführungsform sieht vor, die innere Struktur der Turbinenschaufel zu gießen.Another embodiment provides to cast the inner structure of the turbine blade.

Die Erfindung hat auch eine Turbinenschaufel zum Gegenstand, die nach dem erfindungsgemäßen Verfahren herstellbar ist.The invention also relates to a turbine blade, which can be produced by the method according to the invention.

Weiterhin umfasst die Erfindung ein Reparaturverfahren für die Turbinenschaufel. Bei diesem wird zunächst die vorhandene Umhüllung der Turbinenschaufel von der inneren Struktur entfernt. Dann wird eine neue Umhüllung mit der äußeren Form der Turbinenschaufel um die innere Struktur gegossen.Furthermore, the invention comprises a repair method for the turbine blade. In this case, the existing envelope of the turbine blade is first removed from the inner structure. Then, a new enclosure with the outer shape of the turbine blade is poured around the inner structure.

Mit Hilfe dieses Reparaturverfahrens können Beschädigungen der Umhüllung insbesondere im Rahmen des Refurbishments repariert werden.With the help of this repair process damage to the envelope can be repaired in particular in the context of the refurbishment.

Im Folgenden wird die Erfindung an Hand von zwei Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen im Detail erläutert. In den Zeichnungen zeigen

Figur 1
eine schematische Schnittansicht einer inneren Struktur einer Turbinenschaufel,
Figur 2
eine schematische Schnittansicht einer Turbinennenschaufel, die in einer Umhüllung die innere Struktur der Figur 1 enthält,
Figur 3
eine schematische Schnittansicht einer weiteren inneren Struktur einer Turbinenschaufel,
Figur 4
eine schematische Schnittansicht der inneren Struktur der Figur 3 mit daran befestigten Maskierungselementen, und
Figur 5
eine schematische Schnittansicht einer Turbinenschaufel, die in einer Umhüllung die innere Struktur der Figur 3 enthält.
In the following the invention with reference to two embodiments with reference to the drawings will be explained in detail. In the drawings show
FIG. 1
a schematic sectional view of an inner structure of a turbine blade,
FIG. 2
a schematic sectional view of a turbine blade, which in an enclosure, the internal structure of FIG. 1 contains
FIG. 3
a schematic sectional view of another inner structure of a turbine blade,
FIG. 4
a schematic sectional view of the internal structure of FIG. 3 with masking elements attached thereto, and
FIG. 5
a schematic sectional view of a turbine blade, which in an enclosure, the internal structure of FIG. 3 contains.

Die Figuren 1 und 2 illustrieren ein Verfahren zur Herstellung einer Turbinenschaufel gemäß einer ersten Ausführungsform der Erfindung. Dabei zeigt Figur 1 schematisch im Schnitt eine innere Struktur 1 einer herzustellenden Turbinenschaufel 2. Die innere Struktur 1 besteht aus einer Legierung mit hoher Kriechfestigkeit und weist drei Kühlkanäle 3 auf, die sich durch die innere Struktur 2 erstrecken.The Figures 1 and 2 illustrate a method of manufacturing a turbine blade according to a first embodiment of the invention. It shows FIG. 1 schematically in section an inner structure 1 of a turbine blade 2 to be produced. The inner structure 1 consists of an alloy with high creep resistance and has three cooling channels 3 which extend through the inner structure 2.

Die Figur 2 zeigt die Turbinenschaufel 2 im fertigen Zustand. Dabei ist die innere Struktur 1 in eine Umhüllung 4 aus einer Legierung mit hoher Oxidationsbeständigkeit eingegossen.The FIG. 2 shows the turbine blade 2 in the finished state. In this case, the inner structure 1 is cast in a casing 4 of an alloy with high oxidation resistance.

Um die Turbinenschaufel 2 mit Hilfe des erfindungsgemäßen Verfahrens herzustellen, wird in einem ersten Schritt die innere Struktur 1 aus einer Legierung mit hoher Kriechfestigkeit hergestellt. Dies kann beispielsweise durch spanende Bearbeitung eines Rohlings erfolgen. Alternativ kann die innere Struktur 1 auch mit Hilfe bekannter Verfahren gegossen werden. Bei der Herstellung der inneren Struktur werden die Kühlkanäle 3 mit ausgebildet.In order to produce the turbine blade 2 with the aid of the method according to the invention, in a first step the inner structure 1 is produced from an alloy with high creep resistance. This can be done for example by machining a blank. Alternatively, the inner structure 1 may also be cast by known methods. In the manufacture of the inner structure, the cooling channels 3 are formed with.

Anschließend wird die innere Struktur 1 in einer geeigneten Gussform angeordnet, die die negative Form der herzustellenden Turbinenschaufel 2 aufweist. Dann wird die innere Struktur 1 in der Form mit einer Schmelze der Legierung für die Umhüllung 4 umgossen, wobei gleichzeitig Wasser als Kühlfluid durch die Kühlkanäle 3 geleitet wird, um die innere Struktur 1 zu kühlen. Nach dem Erstarren der Umgusslegierung kann zuletzt die fertige Turbinenschaufel 2 aus der Form entfernt werden.Subsequently, the inner structure 1 is arranged in a suitable mold having the negative shape of the turbine blade 2 to be produced. Then, the inner structure 1 in the mold with a melt of the alloy for Encapsulated envelope 4, wherein simultaneously water is passed as cooling fluid through the cooling channels 3, to cool the inner structure 1. After solidification of the Umgusslegierung last finished turbine blade 2 can be removed from the mold.

Vorteilhafter Weise treten beim Guss durch die Kühlung auf Grund der unterschiedlichen Wärmeausdehnungskoeffizienten der jeweiligen Legierungen Kompressionsspannungen in der Übergangszone zwischen der inneren Struktur 1 und der Umhüllung 3 auf, die eine Rissausbreitung verhindern.Advantageously, during cooling by the cooling, due to the different thermal expansion coefficients of the respective alloys, compression stresses occur in the transition zone between the inner structure 1 and the covering 3, which prevent crack propagation.

In den Figuren 3 bis 5 ist die Herstellung einer Turbinenschaufel 5 gemäß einer weiteren Ausführungsform des erfindungsgemäßen Verfahrens dargestellt. Dabei zeigt die Figur 3 schematisch im Schnitt eine innere Struktur 6 der Turbinenschaufel 5, die einen Kühlkanal 7 aufweist und aus einer ersten Legierung besteht.In the FIGS. 3 to 5 the production of a turbine blade 5 is shown according to a further embodiment of the method according to the invention. It shows the FIG. 3 schematically in section an inner structure 6 of the turbine blade 5, which has a cooling channel 7 and consists of a first alloy.

In der Figur 4 ist die innere Struktur 6 mit daran befestigten keramischen Maskierungselementen 8 gezeigt. Schließlich ist in der Figur 5 die fertige Turbinenschaufel 5 dargestellt, bei der Kanäle 9 in der Umhüllung 10 der inneren Struktur 6 ausgebildet sind.In the FIG. 4 the inner structure 6 with attached ceramic masking elements 8 is shown. Finally, in the FIG. 5 the finished turbine blade 5 shown, are formed in the channels 9 in the enclosure 10 of the inner structure 6.

Zur Herstellung der Turbinenschaufel 5 wird in einem ersten Schritt die innere Struktur 6 gefertigt, indem sie beispielsweise aus der ersten Legierung unter Zuhilfenahme einer geeigneten Form gegossen wird. Anschließend werden die Maskierungselemente 8 an der inneren Struktur 6 befestigt. Dann wird die innere Struktur 6 mit den Maskierungselementen 8 in eine Gussform eingesetzt, die die negative Form der Turbinenschaufel 5 aufweist. Die Form wird mit einer Schmelze der zweiten Legierung gefüllt, wobei auch in diesem Fall gleichzeitig ein Kühlfluid wie Luft durch den Kühlkanal 7 geleitet wird, um die innere Struktur 6 zu kühlen. Nachdem die Umhüllung 10 ausgekühlt ist, wird die Turbinenschaufel 5 aus der Form entnommen und die Maskierungselemente 8 aus der Umhüllung 10 entfernt.To produce the turbine blade 5, the inner structure 6 is produced in a first step, for example, by casting it from the first alloy with the aid of a suitable mold. Subsequently, the masking elements 8 are attached to the inner structure 6. Then, the inner structure 6 with the masking elements 8 is inserted into a mold having the negative shape of the turbine blade 5. The mold is filled with a melt of the second alloy, in which case simultaneously a cooling fluid such as air is passed through the cooling channel 7 in order to cool the inner structure 6. After the serving 10 is cooled, the turbine blade 5 is removed from the mold and the masking elements 8 are removed from the enclosure 10.

Claims (12)

Verfahren zur Herstellung einer Turbinenschaufel (2, 5),
dadurch gekennzeichnet, dass
zunächst eine innere Struktur (1, 6) der Turbinenschaufel (2, 5) gefertigt und dann die innere Struktur (1, 6) mit einer Umhüllung (4, 10) unter Bildung einer äußeren Form der Turbinenschaufel (2, 5) umgossen wird.Method for producing a turbine blade (2, 5),
characterized in that
first an inner structure (1, 6) of the turbine blade (2, 5) made and then the inner structure (1, 6) with a sheath (4, 10) to form an outer shape of the turbine blade (2, 5) is encapsulated. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
die innere Struktur (1, 6) und die Umhüllung (4, 10) aus verschiedenen Materialien, insbesondere aus verschiedenen Metallen und/oder Legierungen hergestellt werden.Method according to claim 1,
characterized in that
the inner structure (1, 6) and the sheath (4, 10) are made of different materials, in particular of different metals and / or alloys. Verfahren nach Anspruch 2,
dadurch gekennzeichnet, dass
die innere Struktur (1, 6) aus einem Material mit hoher Kriechfestigkeit und die Umhüllung (4, 10) aus einem Material mit hoher Oxidationsbeständigkeit hergestellt werden.Method according to claim 2,
characterized in that
the inner structure (1, 6) is made of a material having high creep resistance, and the sheath (4, 10) of a material having high oxidation resistance. Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
bei der Fertigung in der inneren Struktur (1, 6) Kühlkanäle (3, 7) ausgebildet werden.Method according to one of the preceding claims,
characterized in that
in the manufacture in the inner structure (1, 6) cooling channels (3, 7) are formed. Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass
die innere Struktur (1, 6) während des Umgießens gekühlt wird, indem ein Kühlfluid durch die Kühlkanäle (3, 7) geleitet wird.Method according to claim 4,
characterized in that
the inner structure (1, 6) is cooled during the overmolding by passing a cooling fluid through the cooling channels (3, 7). Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
vor dem Umgießen der inneren Struktur (1, 6) Maskierungselemente (8) an der inneren Struktur (1, 6) befestigt werden, um beim Umgießen Kanäle (9) in der Umhüllung (4, 10) auszuformen.Method according to one of the preceding claims,
characterized in that
masking elements (8) are attached to the inner structure (1, 6) prior to encapsulating the inner structure (1, 6) to form channels (9) in the enclosure (4, 10) during encapsulation. Verfahren nach Anspruch 6,
dadurch gekennzeichnet, dass
keramische Maskierungselemente (8) verwendet werden.Method according to claim 6,
characterized in that
ceramic masking elements (8) are used. Verfahren nach einem der Ansprüche 6 oder 7,
dadurch gekennzeichnet, dass
mit den Maskierungselementen (8) Kanäle (9) in der Umhüllung (4, 10) ausgebildet werden, die mit Kühlkanälen (3, 7) in der inneren Struktur (1, 6) kommunizieren.Method according to one of claims 6 or 7,
characterized in that
with the masking elements (8) channels (9) in the enclosure (4, 10) are formed, which communicate with cooling channels (3, 7) in the inner structure (1, 6). Verfahren nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, dass
Kanäle (9) mit einer Diffusoröffnung in der Umhüllung (4, 10) ausgebildet werden.Method according to one of claims 6 to 8,
characterized in that
Channels (9) are formed with a diffuser opening in the enclosure (4, 10). Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die innere Struktur (1, 6) gegossen wird.Method according to one of the preceding claims,
characterized in that
the inner structure (1, 6) is poured. Turbinenschaufel (2, 5),
herstellbar nach einem Verfahren gemäß einem der Ansprüche 1 bis 10.Turbine blade (2, 5),
preparable by a method according to one of claims 1 to 10. Reparaturverfahren für eine Turbinenschäufel (2, 5) nach Anspruch 11,
dadurch gekennzeichnet, dass
die vorhandene Umhüllung (4, 10) der Turbinenschaufel (2, 5) von der inneren Struktur (1, 6) entfernt und dann die innere Struktur (1, 6) mit einer neuen Umhüllung (4, 10) unter Bildung einer äußeren Form der Turbinenschaufel (2, 5) umgossen wird.Repair method for a turbine blade (2, 5) according to claim 11,
characterized in that
removing the existing shroud (4, 10) of the turbine blade (2, 5) from the inner structure (1, 6), and then the inner structure (1, 6) with a new sheath (4, 10) to form an outer shape of the Turbine blade (2, 5) is encapsulated.
EP08009847A 2008-05-29 2008-05-29 Method for manufacturing a turbine blade Withdrawn EP2127781A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08009847A EP2127781A1 (en) 2008-05-29 2008-05-29 Method for manufacturing a turbine blade

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08009847A EP2127781A1 (en) 2008-05-29 2008-05-29 Method for manufacturing a turbine blade

Publications (1)

Publication Number Publication Date
EP2127781A1 true EP2127781A1 (en) 2009-12-02

Family

ID=39768983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08009847A Withdrawn EP2127781A1 (en) 2008-05-29 2008-05-29 Method for manufacturing a turbine blade

Country Status (1)

Country Link
EP (1) EP2127781A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5296308A (en) 1992-08-10 1994-03-22 Howmet Corporation Investment casting using core with integral wall thickness control means
EP1543896A2 (en) * 2003-12-19 2005-06-22 United Technologies Corporation Investment casting cores
EP1634665A2 (en) * 2004-09-09 2006-03-15 United Technologies Corporation Composite core for use in precision investment casting
EP1652603A2 (en) * 2004-10-29 2006-05-03 United Technologies Corporation Investment casting cores and methods
EP1715139A2 (en) * 2005-04-22 2006-10-25 United Technologies Corporation Airfoil trailing edge cooling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5296308A (en) 1992-08-10 1994-03-22 Howmet Corporation Investment casting using core with integral wall thickness control means
EP1543896A2 (en) * 2003-12-19 2005-06-22 United Technologies Corporation Investment casting cores
EP1634665A2 (en) * 2004-09-09 2006-03-15 United Technologies Corporation Composite core for use in precision investment casting
EP1652603A2 (en) * 2004-10-29 2006-05-03 United Technologies Corporation Investment casting cores and methods
EP1715139A2 (en) * 2005-04-22 2006-10-25 United Technologies Corporation Airfoil trailing edge cooling

Similar Documents

Publication Publication Date Title
EP1098725B1 (en) Method and device for producing a metallic hollow body
DE10236339B3 (en) Method for manufacturing turbine blades with cooling ducts involves making ceramic core with positioning pins embedded in free end to protrude into surrounding moulding shell for removal during mechanical finishing of hardened blades
DE102005047035B3 (en) A method of manufacturing a piston for an internal combustion engine and piston produced thereafter
EP2155418A1 (en) Method for producing a cast part, casting mould and cast part produced therewith
DE2738635A1 (en) MULTIPLE CASTING FORM
EP1970142A1 (en) Method for fine casting of metallic parts with narrow channels
DE112008003545T5 (en) Casting method for turbine blades
DE10058428B4 (en) Cylinder liner and cylinder block and method for producing the same
DE10209347A1 (en) Manufacturing method for turbine wheel runner, involves forming coupling part between shaft and turbine wheel by casting shaft edge with casting alloy composed of tin and aluminum intermetallic compound
EP3602584B1 (en) Electrotechnical coil, method for producing same, and electromagnet or electric machine comprising at least one such coil
DE102007010839B4 (en) A method of manufacturing a piston and piston having an annular reinforcement comprising a plurality of reinforcing segments
EP2127781A1 (en) Method for manufacturing a turbine blade
DE102012201871A1 (en) Making turbine casing for turbocharger, comprises inserting a partition wall in a sand core, inserting core in casting tool, filling cavity with casting material to provide turbine casing blank, and cooling turbine casing blank
DE102021000614A1 (en) Mold for the crack-free production of a metal object with at least one undercut, in particular from intermetallic alloys such as TiAl, FeAl and other brittle or crack-prone materials, as well as a corresponding method.
EP3616806B1 (en) Method for producing a model form core blank, a model form core and an investment casting molds and a casting method for producing a cast piece with a hollow structure
EP0578705B1 (en) Process for casting an aluminium-alloy engine part, in particular a cylinder head
DE102018205583A1 (en) Casting device and method for its use
DE102018127559A1 (en) Component of an internal combustion engine, in particular cylinder head, mold assembly and method for producing a component of an internal combustion engine
DE102004034802B4 (en) Metallic permanent mold for the production of large castings from metal alloys
EP1172165A1 (en) Process for manufacturing coolant channels in thermally stressed forming tools and forming tools obtained thereby
DE102020004163A1 (en) Process for the production and use of casting cores for all casting processes, in particular die casting, as well as casting cores produced using this process and intended for the creation of defined cavities in cast parts
DE112020007413T5 (en) Mold with heat sink
DE102018215972A1 (en) Method and tool for producing a coil and coil produced therewith
WO2020058416A1 (en) Method and device for producing a helical metal body
DE10144393A1 (en) Molding base material used in the production of molding materials for mold parts of casting molds contains quartz sand present in beta-tridymite modification with the remainder quartz sand in a lower modification stage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

AKY No designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100603

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566