EP3733348B1 - Procédé et dispositif pour lisser la surface d'une pièce - Google Patents

Procédé et dispositif pour lisser la surface d'une pièce Download PDF

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Publication number
EP3733348B1
EP3733348B1 EP20156017.4A EP20156017A EP3733348B1 EP 3733348 B1 EP3733348 B1 EP 3733348B1 EP 20156017 A EP20156017 A EP 20156017A EP 3733348 B1 EP3733348 B1 EP 3733348B1
Authority
EP
European Patent Office
Prior art keywords
component
liquid
guide
solids mixture
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.)
Active
Application number
EP20156017.4A
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German (de)
English (en)
Other versions
EP3733348A1 (fr
Inventor
Martin Fessler-Knobel
Jörg Windprechtinger
Georg Astl
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.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines AG
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Publication date
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Publication of EP3733348A1 publication Critical patent/EP3733348A1/fr
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Publication of EP3733348B1 publication Critical patent/EP3733348B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
    • B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/003—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor whereby the workpieces are mounted on a holder and are immersed in the abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • 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

Definitions

  • the present invention relates to a method and a device for smoothing a component surface.
  • a turbomachine can be functionally divided into a compressor, combustion chamber and turbine.
  • air drawn in is compressed in the compressor and burned in the downstream combustion chamber with added kerosene.
  • the resulting hot gas a mixture of combustion gas and air, flows through the downstream turbine and is expanded in the process.
  • the turbine and compressor are usually constructed in several stages, with each stage comprising a guide vane and a rotor blade ring.
  • Each blade ring is made up of a plurality of blades arranged in a rotating sequence, around which the compressor or hot gas flows depending on the application. Smoothing these component surfaces can be aerodynamically advantageous, for example.
  • the present invention is based on the technical problem of specifying an advantageous method for smoothing a surface of a component.
  • the component is placed in a container (bath) with a liquid-solid mixture, and a relative movement is generated between the mixture and the component.
  • the mixture flows along the surface to be smoothed, which allows a combined chemical-mechanical removal of material to be achieved, and the component is polished chemically and mechanically.
  • a guide surface is provided in the bath or container with the mixture, along which the mixture flows. The guide surface guides the flow and in particular presses the solid component towards the component surface, thus superimposing a directional component towards the component surface.
  • the guide surface guides the mixture, and in particular the solid portion, onto the surface so that sufficient pressure is achieved there to remove material.
  • the solid portion can, for example, be in the form of particles, in particular spheres, with the balls then rolling along the component surface with sufficient pressure due to the guide to achieve the desired polishing effect.
  • the solid portion in the mixture can, in particular, be so high that a coherent agglomeration of particles or balls is present between the guide surface and the surface of the component; a force chain is thus formed between the guide surface and the component so that the particles/balls are reliably pressed against the component surface.
  • the guide surface can, for example, create or help to set a more uniform pressure across the component surface, which can improve the homogeneity of the smoothing result.
  • the component can preferably be a blade of a turbomachine, which is arranged in the gas channel and has hot gas flowing around it.
  • a turbine area is also conceivable, i.e. the blade can be arranged in the hot gas channel and hot gas can flow around it.
  • An application in the compressor area is preferred, i.e. the blade can have compressor gas flowing around it in the compressor gas channel.
  • the guide surface is a side surface of a guide body around which the bath flows.
  • the latter means that the liquid-solid mixture flows not only along the guide surface, but also along a side surface of the guide body opposite the guide surface.
  • the guide body is preferably made of metal, in particular it can be a guide plate (simple and flexible production).
  • the component surface has a curved profile when viewed in a cutting plane and the guide surface is complementarily curved when viewed in the same cutting plane. If the surface is convex, for example, the guide surface extends concavely, and in the case of a concave component surface, it extends convexly.
  • the cutting plane in question is preferably parallel to the direction of flow; in the case of the blade, for example, it can be a tangential cutting plane (in this, the blade profile is viewed, the cutting plane is tangential to a revolution around the longitudinal or rotational axis of the turbomachine).
  • the guide surface is arranged in relation to the component surface in such a way that a distance between them decreases in the direction of flow.
  • the distance is viewed in section (see the previous paragraph regarding the cutting plane) perpendicular to the streamlines between the surface and the guide surface.
  • a distance that decreases continuously (without jumps/steps) in the direction of flow can be used, which can offer advantages with regard to the desired homogenization.
  • a further guide surface is provided in the bath, which can also be formed by a guide body, in particular a guide plate.
  • the component is or will be arranged between the guide surfaces in a direction perpendicular to the direction of flow.
  • the flow is then guided by one guide surface to a surface area of the component and by the other guide surface to an opposite surface area.
  • one guide surface can be assigned to the suction side surface and the other to the pressure side surface.
  • the guide surfaces between which the component is placed are arranged relative to one another in such a way that a distance between them decreases in the direction of flow.
  • this guide surface distance is taken in section perpendicular to the streamlines between the guide surfaces, see also the above comments. So, for example, if an airfoil is smoothed and the flow is directed at the leading edge, the distance between the guide surfaces arranged on either side of it decreases from the leading to the trailing edge.
  • the distance between the guide surface and the respective surface area also decreases, see above.
  • the component can generally also be a fairing , for example.
  • Channel plates ( panels ) can also be smoothed and thus optimized with regard to the flow around the gas channel.
  • the component is preferably an airfoil.
  • a nozzle could generally also be provided in the bath, through which the mixture is pumped and thus accelerated onto the component. In this case, the latter would be viewed in a fixed coordinate system, i.e. in the processing machine and therefore also in the assembly or production hall, for example.
  • the relative movement is achieved by moving the component through the liquid-solid mixture.
  • the component is then moved; it is pulled or pushed through the mixture.
  • the guide surfaces or guide bodies/guide plates are moved through the bath together with the component.
  • they can be arranged on a holder into which the component is placed and which is then moved through the mixture together with the component.
  • the liquid-solid mixture can be water-based, for example. Depending on the material of the component, it can contain an acid, e.g. hydrogen peroxide.
  • the liquid component can also contain silicates, for example.
  • the solid component is preferably provided in particle or spherical form, in particular in the form of glass or metal spheres. These can have a diameter in the micro- or millimeter range, for example of at least 200 ⁇ m and a maximum of 2 mm, for example of around 0.5 mm.
  • the invention also relates to a device for smoothing a component surface according to claim 9.
  • Fig.1 shows a device 1 for smoothing a component 2, specifically a surface 2.1 of the component 2.
  • the component 2 is a blade or a vane of an aircraft engine, see also Fig.3 for illustration.
  • the component 2 is placed in a container 3 that is filled with a liquid-solid mixture 4.
  • the component 2 is then moved in the liquid-solid mixture 4, thus generating a relative movement 5 between the liquid-solid mixture 4 and the component 2.
  • the mixture 4 is made up of a liquid component 7 (in this case, e.g. water, H 2 O 2 , silicates) and spherical solids 8 with a diameter of e.g. 0.5 mm.
  • a liquid component 7 in this case, e.g. water, H 2 O 2 , silicates
  • spherical solids 8 with a diameter of e.g. 0.5 mm.
  • a guide surface 20 is arranged in the mixture 4, which imposes a directional component 21 on the flow 6 towards the surface 2.1 of the component 2.
  • Fig. 2a -c illustrates (especially in Fig. 2a ), each in one cut (based on Fig.1 the cutting plane is perpendicular to the drawing surface and horizontal).
  • the profile shape of component 2 e.g. the blade, can be seen.
  • a further guide surface 200 is provided, which also imposes a directional component 210 on the flow 6 towards the component surface 2.1.
  • a guide surface 20,200 is thus assigned to both a suction side surface 2.1.1 and a pressure side surface 2.1.2 of the blade.
  • Each of the guide surfaces 20,200 is formed by a guide body 22,220, namely a guide plate around which the mixture 5 flows.
  • the guide surfaces 20,200 are arranged relative to the component 2 or its surface 2.1 such that a respective distance 25,250 to the surface 2.1 decreases in the flow direction 26. Furthermore, a guide surface distance 27 between the guide surfaces 20,200 also decreases in the flow direction 26.
  • the component 2 i.e. the blade
  • the component 2 is not flown at its leading edge, but at its trailing edge during smoothing.
  • only a single guide body 22 with the guide surface 20 is used, which is assigned to the suction side surface 2.1.1 of the component 2.
  • the Fig. 2a-c illustrate different possibilities and options.
  • Fig.3 shows a turbomachine 30, specifically a turbofan engine, in an axial section (the section plane includes the longitudinal axis 31).
  • the turbomachine 30 is divided into a compressor 32, a combustion chamber 33 and a turbine 34, whereby air drawn in is compressed in the compressor 32.
  • the combustion chamber 33 it is burned with kerosene mixed in, and the resulting hot gas is expanded in the turbine 34.
  • Both the compressor 32 and the turbine 34 are constructed in several stages.
  • the component 2 (the blade smoothed as described above) can be used in both the turbine 34 and the compressor 32, the latter being preferred (due to the high aerodynamic requirements there).
  • Component 2 Surface (component surface) 2.1 Suction side surface 2.1.1 Print side area 2.1.2 container 3 Liquid-solid mixture 4 Relative motion 5 flow 6 Liquid component 7 Solids 8th Guide surface 20
  • Directional component (to the component surface) 21
  • Guide body 22 Distance 25
  • Flow direction 26 Guide surface distance 27
  • Turbomachine 30 Longitudinal axis 31
  • compressor 32 Combustion chamber 33
  • turbine 34 Guide surface (other) 200
  • Directional component (of the further guide surface) 210 Guide body (further) 220 Distance (of the further guide surface) 250

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Procédé permettant le lissage d'une surface (2.1) d'une pièce (2) qui est conçue pour être disposée dans un canal de gaz d'une turbomachine (30) et la pièce (2) est de préférence une pale d'aube pour une turbomachine (30), dans lequel la surface (2.1) est une surface (2.1) tournée vers le canal de gaz, dans lequel procédé
    - la pièce (2) est placée dans un récipient (3) comportant un mélange liquide-solides (4) ;
    - un déplacement relatif (5) est généré entre le mélange liquide-solides (4) et la pièce (2), c'est-à-dire un écoulement (6) du mélange liquide-solides (4) le long de la surface (2.1) ;
    dans lequel une surface de guidage (20) est prévue dans le mélange liquide-solides (4), le long de laquelle s'écoule le mélange liquide-solides (4), dans lequel une composante directionnelle (21) est imposée à l'écoulement (6) en direction de la surface (2.1) et
    dans lequel une autre surface de guidage (200) est prévue dans le mélange liquide-solides (4), le long de laquelle s'écoule le mélange liquide-solides (4), caractérisé en ce que
    la pièce (2) est disposée entre les surfaces de guidage (20, 200) et dans lequel les surfaces de guidage (20, 200) sont disposées l'une par rapport à l'autre de telle sorte qu'une distance entre les surfaces de guidage (27), laquelle est prise, vue dans un plan de coupe, perpendiculairement à un profil de lignes de courant entre les surfaces de guidage (20, 200), diminue dans le sens d'écoulement (26).
  2. Procédé selon la revendication 1, dans lequel la surface de guidage (20) est une surface latérale d'un corps de guidage (22) autour duquel s'écoule le mélange liquide-solides (4), dans lequel le mélange liquide-solides (4) s'écoule donc également le long d'une surface latérale opposée à la surface de guidage (20).
  3. Procédé selon la revendication 1 ou 2, dans lequel la surface (2.1) de la pièce (2), vue dans un plan de coupe, a un tracé courbe et la surface de guidage (20), vue dans le même plan de coupe, a un tracé courbe complémentaire.
  4. Procédé selon l'une des revendications précédentes, dans lequel la surface de guidage (20) est disposée par rapport à la surface (2.1) de telle sorte qu'une distance (25) prise, vue dans un plan de coupe, perpendiculairement à un profil de lignes de courant entre la surface (2.1) et la surface de guidage (20), diminue dans le sens d'écoulement (26).
  5. Procédé selon la revendication 1, dans lequel la surface (2.1) de la pièce (2) comprend une surface latérale d'aspiration et une surface latérale de pression, dans lequel respectivement une surface de guidage (20, 200) dans le mélange liquide-solides (4) est associée à la fois à la surface latérale d'aspiration et à la surface latérale de pression.
  6. Procédé selon l'une des revendications précédentes, dans lequel la pièce (2) est déplacée dans un système de coordonnées fixe pour générer le déplacement relatif (5), c'est-à-dire que la pièce (2) est déplacée par le mélange liquide-solides (4).
  7. Procédé selon la revendication 6, dans lequel la surface de guidage (20) ou les surfaces de guidage (20, 200) sont déplacées conjointement avec la pièce (2) par le mélange liquide-solides (4).
  8. Procédé selon l'une des revendications précédentes, dans lequel le mélange liquide-solides (4) est prévu à base d'eau avec des solides sphériques (8).
  9. Dispositif permettant le lissage d'une surface (2.1) de la pièce (2) pour la mise en oeuvre d'un procédé selon l'une des revendications précédentes, caractérisé en ce que le dispositif présente :
    - un récipient (3) permettant de recevoir le mélange liquide-solides (4) et permettant de disposer la pièce (2) ;
    - un appareil de déplacement permettant de générer le déplacement relatif (5) entre le mélange liquide-solides (4) et la pièce (2) ;
    - une surface de guidage (20) dans le récipient (3) pour imposer à l'écoulement (6) la composante directionnelle (21) vers la surface (2.1) et dans lequel une autre surface de guidage (200) est prévue dans le mélange liquide-solides (4), le long de laquelle s'écoule le mélange liquide-solides (4), pour disposer la pièce (2) entre les surfaces de guidage (20, 200),
    caractérisé en ce que les surfaces de guidage (20, 200) sont disposées l'une par rapport à l'autre de telle sorte qu'une distance entre les surfaces de guidage (27), laquelle est prise, vue dans un plan de coupe, perpendiculairement à un profil de lignes de courant entre les surfaces de guidage (20, 200), diminue dans le sens d'écoulement (26).
EP20156017.4A 2019-02-08 2020-02-07 Procédé et dispositif pour lisser la surface d'une pièce Active EP3733348B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019201656.1A DE102019201656A1 (de) 2019-02-08 2019-02-08 Verfahren zum glätten einer oberfläche eines bauteils

Publications (2)

Publication Number Publication Date
EP3733348A1 EP3733348A1 (fr) 2020-11-04
EP3733348B1 true EP3733348B1 (fr) 2024-06-26

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EP20156017.4A Active EP3733348B1 (fr) 2019-02-08 2020-02-07 Procédé et dispositif pour lisser la surface d'une pièce

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Country Link
US (1) US11612977B2 (fr)
EP (1) EP3733348B1 (fr)
DE (1) DE102019201656A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114453990B (zh) * 2022-04-12 2022-08-19 徐州中顺尚奕机械制造有限公司 混合清洁型热膨胀式金属表面全方位无损除锈加工装置
DE102022209051A1 (de) 2022-08-31 2024-02-29 Zf Friedrichshafen Ag Verfahren und Steuergerät zum Betreiben eines Antriebsstrangs eines Fahrzeugs

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Publication number Publication date
EP3733348A1 (fr) 2020-11-04
US20200254581A1 (en) 2020-08-13
DE102019201656A1 (de) 2020-08-13
US11612977B2 (en) 2023-03-28

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