EP2349625A1 - Procédé de fabrication de roues fermées - Google Patents

Procédé de fabrication de roues fermées

Info

Publication number
EP2349625A1
EP2349625A1 EP09756271A EP09756271A EP2349625A1 EP 2349625 A1 EP2349625 A1 EP 2349625A1 EP 09756271 A EP09756271 A EP 09756271A EP 09756271 A EP09756271 A EP 09756271A EP 2349625 A1 EP2349625 A1 EP 2349625A1
Authority
EP
European Patent Office
Prior art keywords
manufacturing
blade
guide
machining
guide surface
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Withdrawn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
EP09756271A
Other languages
German (de)
English (en)
Inventor
Werner Jahnen
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.)
Sulzer Markets and Technology AG
Original Assignee
Sulzer Markets and Technology 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 Sulzer Markets and Technology AG filed Critical Sulzer Markets and Technology AG
Priority to EP09756271A priority Critical patent/EP2349625A1/fr
Publication of EP2349625A1 publication Critical patent/EP2349625A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/16—Working surfaces curved in two directions
    • B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/10—Working turbine blades or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2227—Construction and assembly for special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2215/00—Details of workpieces
    • B23C2215/48—Kaplan turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/10—Manufacture by removing material
    • F05D2230/11—Manufacture by removing material by electrochemical methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/10—Manufacture by removing material
    • F05D2230/12—Manufacture by removing material by spark erosion methods

Definitions

  • the invention relates to a manufacturing method for closed wheels according to the preamble of claim 1 and a closed impeller made with such a method.
  • Closed impellers are used in turbomachinery such as pumps or turbines to transfer energy to a fluid such as gas, vapor, or liquid, or vice versa, energy from a fluid to the impeller.
  • a closed impeller for this purpose contains one or more blades, between a front and a rear cover plate, as a top plate and bottom plate or cover and
  • Floor are arranged, are arranged, wherein the rear cover plate and / or the blades are normally connected to a hub which may be designed to receive a shaft. Blade channels are formed between the blades, which are closed as a result of the arrangement of the blades between the front and rear cover plate.
  • closed wheels have a long tradition.
  • molds with cores are used, which define the shape of the blade channels.
  • Closed wheels, which are produced by casting have the disadvantage that faulty points in the interior of the impeller can hardly be repaired, and that in particular in comparatively thin blades or thin-walled cover the quality control is critical.
  • the limited accuracy of the cast wheels and the roughness of the cast surfaces a problem depending on the application.
  • the shape of the blade channels is machined out of a blank, which is usually made of solid material.
  • the outer shape of the impeller can be machined.
  • the machining has proven to be particularly useful if the material of the impeller is easy to machine and the geometry is comparatively simple, so that all areas to be machined in the impeller can be easily achieved with a cutting tool.
  • impellers are therefore made of solid material using high strength steels, stainless steels, superalloys, and other suitable materials.
  • a disadvantage is that some of these materials make special demands on the machining due to their toughness and / or hardness.
  • the geometry of the impeller to be produced can give rise to difficulties in machining.
  • a close staggering of the blades at the inlet of the impeller and / or a strong curvature of the blades may, for example, lead to the geometry that the entire blade can not be machined, or only part of the blade channel can be machined, and that The blades remain areas that are usually wedge-shaped and protrude into the blade channel.
  • a comparatively strong curvature of the front cover plate can lead to the geometry of the entire cover surface of the blade channel can not be machined, and remain on the top surface areas that are usually wedge-shaped and project into the blade channel.
  • One known solution to the machining problems encountered with machined closed impellers is to make the impeller from multiple prefabricated parts which are joined together by welding. For example, first the hub, the rear cover plate and the blades can be milled from the solid one piece and then the separately prepared front cover plate are welded to the blades. It is also possible, for example, to mill the hub, the rear cover disk and the outer part of the front cover disk as well as the blades in one piece from the solid and then to weld the separately produced inner part of the front cover disk to the blades.
  • the object of the present invention is to provide a manufacturing method, by means of which closed wheels can be made in one piece, and which allows the production of comparatively complicated geometries, their production not possible with machining methods of the prior art or comparatively less economical is.
  • Another object of the present invention is to provide a closed impeller made by such a manufacturing method.
  • openings for the blade channels are created in a blank by means of a program-controlled cutting device in a blank.
  • Manufacturing processes are additionally introduced in a further step electrodes of a device for EDM or electrochemical ablation in the openings and made part of the predetermined shape of the blade channels by spark erosion or by electrochemical machining.
  • the machined openings for the blade channels may be a raw form of the blade channels, and / or the machined openings for the blade channels may be continuous.
  • a part of the predetermined shape of the blade channels is produced by machining.
  • the largest part, in particular at least 75% or at least 90%, of the predetermined shape of the blade channels is produced by machining.
  • the machining production of part or most of the predetermined shape of the blade channels can, for example, take place before the spark erosion, so that the part of the predetermined shape to be eroded is kept small or reduced to a minimum.
  • the impeller comprises a front cover plate and a rear cover plate, wherein the blade channels and / or the blades and / or one or both cover plates may have a curvature.
  • a machining method in which in each case curved guide surfaces for the machining by means of a cutting tool are provided in the openings to be created for the blade channels and / or in the blade channels to be created, the thus to the shape and spatial position the blade channels are adapted so that the cutting tool is not brought into contact with a blade channels limiting edge surface in the Zerspan process the cutting tool each guided along a guide surface and machined by the respective guide surface machining area is machined to an opening and / or to create parts of a blade channel, wherein the Cutting tool has a guide axis and is guided in relation to the guide axis at a constant guide angle along the respective guide surface.
  • the guide surfaces do not become an edge surface and / or an end surface
  • Parallel surface and / or offset surface arranged. Further, if necessary, a tool coordinate and / or a tool vector of the cutting tool can be adapted to the guide surface.
  • a tool coordinate and / or a tool vector of the cutting tool can be adapted to the guide surface.
  • at least two guide surfaces of an opening and / or a blade channel are not parallel.
  • the guide angle is not changed during the production of an opening and / or a part of a blade channel.
  • the guide angle is varied during the production of an opening and / or a part of a blade channel during a change from one guide surface to the next guide surface according to a predetermined scheme.
  • the change of the cutting tool from a guide surface to a next guide surface is carried out discontinuously and / or to change from a guide surface to a next guide surface a bore in the region of the two
  • Guide surfaces or provided in the region of all guide surfaces of an opening and / or a portion of a blade channel can also be carried out continuously, for example helically in the form of a helix.
  • the guide angle is usually set to a value between 70 ° and 120 ° or between 85 ° and 95 ° or between 88 ° and 92 ° and advantageously to a value of substantially 90 °.
  • the invention comprises a closed impeller manufactured by means of a manufacturing method according to one of the above-described embodiments and variants.
  • the inventive manufacturing method has the advantage that thus closed wheels can be made in one piece, the blade channels can not be generated purely machined due to the geometry and / or their production would be uneconomical in purely machining the blade channels. Thanks to the fact that a part and usually the largest part of the blade channel shape can be machined and only a smaller part is produced by means of spark erosion, a cost optimization is possible.
  • FIG. 2 shows the impeller according to FIG. 1 with a cutting tool inserted into a blade channel, the front cover disk being omitted in order to make the blades visible, FIG.
  • FIG. 3A is a detailed view of a variant of the impeller according to FIG. 3 with a blade on which, on one side after the machining a wedge-shaped area has stopped
  • FIGS. 3 and 3A shows a detailed view of a variant embodiment of the impeller according to FIGS. 3 and 3A with a blade channel, on the front cover surface of which after the cutting
  • Fig. 5A shows the embodiment according to Fig. 3B seen from the front of the impeller, wherein the front cover plate is omitted in the drawing to make the blades visible,
  • FIG. 5B the embodiment of FIG. 3B seen obliquely from the outside, wherein the front cover plate is omitted in the drawing to make the blades visible, and
  • FIG. 6 shows a section of an impeller during machining by means of a machining process according to a further exemplary embodiment of the production method according to the invention.
  • Fig. 1 shows a closed impeller, in the production of which in one piece with purely machining machining of the blade channels difficulties may occur.
  • the impeller 1 may include one or more blades 2.1, 2.2 disposed between a front shroud 5 and a rear shroud 6, the rear shroud and / or vanes normally being connected to a hub 4 adapted to receive a shaft can be.
  • Between the blades 2.1, 2.2 are a or a plurality of blade channels 3.1, 3.2 are formed, which have a predetermined shape, and which are closed due to the arrangement of the blades between the front and rear cover plate.
  • Fig. 2 shows the above-described impeller according to Fig. 1 with a cutting tool 10 inserted into a blade channel 3.1 with the front cover disc omitted in the drawing to make the blades visible in full length.
  • the impellers shown in Figures 1 and 2 are the same regardless of the different representation. Due to the length of the blades, a comparatively long cutting tool is required for the machining of the blade channels 3.2, 3.2 of the impeller shown, for example, as shown in Fig. 2, a cutting tool with a long shaft.
  • the curvature and staggering of the blades 2.1, 2.2 of the impeller shown is such that a purely chip-generating production of the blade channels still seems almost possible.
  • Fig. 3 shows an embodiment of a closed impeller, which was manufactured by a manufacturing method according to the present invention.
  • the impeller 1 may include one or more blades 2, 2a arranged between a front cover disk 5 and a rear cover disk 6. Between the blades 2, 2a are one or more
  • Blade channels 3 are formed, which have a predetermined shape, and which are closed due to the arrangement of the blades between the front and rear cover plate.
  • the individual blades may have different lengths, for example, by, as shown in Fig. 3, blades 2 a shortened in length between blades 2, also called “splinter vanes", are arranged.
  • the impeller comprises a front cover plate and a rear cover plate, wherein the Blade channels 3 and / or the blades 2, 2a and / or one or both cover plates 5, 6 may have a curvature.
  • openings for the blade channels 3 are produced in a blank by means of a program-controlled cutting device by milling the openings, for example, in a known manner with a multi-axis CNC milling machine.
  • the machined openings for the blade channels may be a raw form of the blade channels, and / or the machined openings for the blade channels may be continuous.
  • part or most of the predetermined shape of the blade channels for example at least 75% or at least 90%, is produced by machining.
  • FIG. 3A shows a detailed view of a variant of the embodiment of the impeller according to FIG. 3 with a blade 2 on which a wedge-shaped region 8, which projects into the blade channel 3, has remained on one side after the machining.
  • Such wedge-shaped areas can arise, for example, if due to the curvature and / or staggering of the blades 2, 2 a, a purely chip-removing production of the
  • Blade channels 3 is not possible or not economical.
  • Fig. 3B shows a detailed view of a variant of the embodiment of the impeller according to FIG. 3 with a blade channel 3, on whose front cover surface after the machining, a wedge-shaped region 9 has additionally stopped, which protrudes into the blade channel 3.
  • Such wedge-shaped regions 9 may arise, for example, if due to the curvature of the front cover plate a purely machined production of the blade channels 3 is not possible or not economical.
  • FIGS. 4A-4C show the wedge-shaped regions 8, 9 from the exemplary embodiment according to FIG. 3B during processing by means of a spark erosion electrode 11 according to an exemplary embodiment of the production method according to the invention.
  • the spark erosion electrode 11 is inserted into the blade channel 3.
  • Fig. 4B shows the spark erosion electrode 11 in processing the wedge-shaped portion 8 formed on the blade 2, and in Fig. 4C, the spark erosion electrode 11 abuts against the blade 2 and front deck surface of the blade channel 3 with portions of the wedge-shaped ones Areas 8, 9 are already wegerodiert.
  • Fig. 5A shows the embodiment according to Fig. 3B seen from the front of the impeller, wherein the front cover plate has been omitted in the drawing to make the blades visible.
  • the impeller shown includes a plurality of blades 2.1, 2.2, 2.1 a, 2.2 a, which are arranged between a front cover plate and a rear cover plate.
  • Blade channels 3 are formed between the blades, which have a predetermined shape and which are closed as a result of the arrangement of the blades between the front and rear cover disk.
  • the individual blades may be of different lengths, for example by having blades shortened 2.1a, 2.2a, also called “splinter vanes", between the blades of full length, as shown in Figure 5A, on the blade 2.1 and on the front
  • the top surface of the blade channel 3 after cutting has stopped in each case a wedge-shaped region 8, 9, both of which project into the blade channel 3.
  • Fig. 5A additionally shows a spark erosion electrode 11 which is inserted into the blade channel 3 for processing the wedge-shaped regions 8, 9 is.
  • Fig. 5B shows the same embodiment as Fig. 5A seen obliquely from the outside, wherein the front cover plate has been omitted in the drawing to make the blades visible.
  • FIG. 5B shows the same embodiment as Fig. 5A seen obliquely from the outside, wherein the front cover plate has been omitted in the drawing to make the blades visible.
  • the spark erosion electrode used in the production method according to the invention is advantageously designed as a shaped electrode, which is adapted to the shape of the blade channels. Normally, several formula electrodes are needed, for example three or four, since usually different areas of the blade channels have to be processed. In addition, the formula electrodes wear out and must be replaced depending on the desired accuracy of processing.
  • the shape of the blade channels is produced by machining, as far as this is possible and / or economical, and subsequently in the unfinished areas, the shape of the blade channels is produced by means of spark erosion or by means of electrochemical removal.
  • a program-controlled spark erosion machine or machine for electrochemical ablation with four or more controlled axes is advantageously used.
  • a blade channel of an inventive impeller has a length of typically 30 mm to 300 mm and a width and / or height of typically 10 mm to 200 mm. In individual cases, however, the dimensions mentioned may differ significantly from the stated values.
  • a metal or a metal alloy is advantageously used in the inventive manufacturing method, for example aluminum, titanium, steel, nickel, an aluminum or magnesium alloy, a nickel or cobalt base alloy, forging or casting material, a non-ferrous metal, but also another material that can be machined and additionally optionally eroded or electrochemically removed.
  • a Zerspan Kunststoff is used, which will be explained below with reference to FIG. 6, and in which in the openings to be created for the blade channels 13 and / or in the blade channels 3 to be created respectively curved guide surfaces 14 for machining by means of a cutting tool 10 are provided, which are adapted to the shape and spatial position of the blade channels, that the cutting tool 10 during machining not with the blade channels limiting edge surface 2 in In the machining process, the cutting tool 10 is guided along a guide surface 14 and a machining area 12 predetermined by the respective guide surface is machined to produce an opening 13 and / or parts of a blade channel 3, the cutting tool 10 being a guide axis 10a and is guided in relation to the guide axis at a constant guide angle ⁇ along the respective guide surface 14.
  • the said guide angle is often referred to as the angle of attack.
  • Fig. 6 shows a section of a closed impeller 1 in section.
  • the impeller includes an opening to be created 13, which is advantageously designed as a blade channel 3, and curved guide surfaces 14.
  • a cutting tool 10 with a guide axis 10 a is not shown in FIG. 6 manipulator of a cutting device, such as a multi-axis CNC milling machine such as a five-axis CNC milling machine, chipping along a guide surface 14 out. 6 a part of the opening 13 to be created or of the blade channel 3 to be created is already finished in an initial region 15, while in an adjoining region 16 the opening or the blade channel has not yet been completed. Expediently, all guide surfaces 14 are calculated before the beginning of the machining operation for producing the opening 13 or the blade channel 3. In Fig.
  • the guide surfaces in the processing area 12 are shown schematically as curved dashed lines.
  • the cutting tool 10 is guided with respect to its guide axis 10a at a constant angle ⁇ to the respective guide surface.
  • the guide surfaces 14 are advantageously determined so that the tool can mill out the entire opening 13 or the entire blade channel 3, without the guide tool comes into contact with one of the edge surfaces 2, which limit the opening or the blade channel.
  • the guide surfaces 14 are advantageously calculated so that the cutting tool 10 at least with respect to certain guide surfaces and possibly with respect to all calculated guide surfaces in Machining at the same angle ⁇ , namely substantially below the specified by the manufacturer for the cutting tool optimum guide angle is performed. Certain deviations of, for example, +/- 5 ° or +/- 1 ° or less from the optimum guide angle are generally tolerable if the quality of the machined impeller does not suffer and the cutting tool is essentially still working optimally.
  • the guide surfaces 14 are arranged to no edge surface 2 and / or no end surface as a parallel surface and / or offset surface.
  • offset surface refers to surfaces which, although not strictly parallel in the strict sense, nevertheless have the same distance from each other everywhere.
  • An example of this is e.g. two concentric spherical shells with different diameters, which are at a fixed distance over the entire surface, but still have different radii of curvature.
  • a tool coordinate and / or a tool vector of the cutting tool 10 can be adapted to the guide surface 14.
  • at least two guide surfaces of an opening and / or a blade channel are not parallel and form no offset surfaces to each other.
  • the guide angle ⁇ is not changed during the production of an opening 13 and / or a part of a blade channel 3.
  • the guide angle ⁇ is varied during the production of an opening 13 and / or a part of a blade channel 3 in a change from one guide surface to the next guide surface according to a predetermined scheme, the guide angle advantageously for all guide surfaces only slightly, for example Deviates +/- 5 ° or +/- 1 ° from the optimum guide angle.
  • the change of the cutting tool from a guide surface to a next guide surface can be carried out discontinuously and / or it can for changing from a guide surface to a next guide surface a bore in the region of the two guide surfaces or in the region of all guide surfaces of an opening and / or a portion of a blade channel be provided.
  • the change of the cutting tool from a guide surface to a next guide surface can also be carried out continuously, for example spirally in the form of a ramp or helix. That is, for example, that the cutting tool more or less continuously in a direction of advancement of the
  • Zerspanwerkmaschinemaschinees for example, is driven substantially perpendicular to a guide surface 14, so that the transition from a guide surface is not discontinuous but gradually, so that the cutting tool in the advancing direction, for. performs a spiral or helical movement.
  • the guide angle ⁇ is normally set optimally to the cutting tool, for example to a value between 70 ° and 120 ° or between 85 ° and 95 ° or between 88 ° and 92 ° and advantageously to a value of essentially 90 °.
  • the machining method described above allows to work completely on a workpiece having a more or less constant optimum guide angle, even if it has a very complicated geometric structure and the material is difficult to machine, because e.g. has a high hardness and / or high strength and / or other properties that make the machining difficult.
  • the invention comprises a closed impeller manufactured by means of a manufacturing method according to one of the above-described embodiments and variants.
  • closed wheels have the advantage that they are made in one piece, and that comparatively short lead times for prototypes and a comparatively high accuracy of the geometric shape can be achieved compared to cast wheels.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un procédé de fabrication de roues fermées comportant des aubes (2, 2a) entre lesquelles sont réalisés des canaux (3) d'une forme prédéfinie, procédé selon lequel des ouvertures sont ménagées dans une ébauche par enlèvement de copeaux pour former les canaux d'aubes à l'aide d'un dispositif d'enlèvement de copeaux commandé par programme. Selon le procédé de fabrication, et dans le cadre d'une étape supplémentaire, on introduit dans les ouvertures des électrodes (11) d'un dispositif d'électro-érosion ou d'ablation électrochimique et on réalise une partie de la forme prédéfinie des canaux d'aubes (3) par électro-érosion ou par ablation électrochimique.
EP09756271A 2008-10-20 2009-10-20 Procédé de fabrication de roues fermées Withdrawn EP2349625A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09756271A EP2349625A1 (fr) 2008-10-20 2009-10-20 Procédé de fabrication de roues fermées

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08167041A EP2177298A1 (fr) 2008-10-20 2008-10-20 Procédé de fabrication pour roues porteuses fermées
EP09756271A EP2349625A1 (fr) 2008-10-20 2009-10-20 Procédé de fabrication de roues fermées
PCT/EP2009/063705 WO2010046353A1 (fr) 2008-10-20 2009-10-20 Procédé de fabrication de roues fermées

Publications (1)

Publication Number Publication Date
EP2349625A1 true EP2349625A1 (fr) 2011-08-03

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP08167041A Withdrawn EP2177298A1 (fr) 2008-10-20 2008-10-20 Procédé de fabrication pour roues porteuses fermées
EP09756271A Withdrawn EP2349625A1 (fr) 2008-10-20 2009-10-20 Procédé de fabrication de roues fermées

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08167041A Withdrawn EP2177298A1 (fr) 2008-10-20 2008-10-20 Procédé de fabrication pour roues porteuses fermées

Country Status (3)

Country Link
US (1) US20110255976A1 (fr)
EP (2) EP2177298A1 (fr)
WO (1) WO2010046353A1 (fr)

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FR3015554B1 (fr) * 2013-12-19 2016-01-29 Snecma Secteur d'anneau de turbine pour turbomachine d'aeronef, presentant des orifices de prehension ameliores
DE102015207017B4 (de) 2015-04-17 2017-04-27 Hermle Maschinenbau Gmbh Verfahren zur Herstellung von gedeckelten Laufrädern
US10300544B2 (en) 2016-05-23 2019-05-28 General Electric Company Machining and manufacturing systems and method of operating the same
CN106735633B (zh) * 2016-12-23 2019-02-26 北京市电加工研究所 一种闭式叶轮电火花加工装置及加工方法
CN107570768B (zh) * 2017-07-10 2018-11-06 西北工业大学 开式整体叶盘通道多刀具分区域粗加工工艺方法
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