WO2011135118A1 - Device for grinding the blades of rotor discs and associated grinding method - Google Patents

Device for grinding the blades of rotor discs and associated grinding method Download PDF

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Publication number
WO2011135118A1
WO2011135118A1 PCT/ES2011/000023 ES2011000023W WO2011135118A1 WO 2011135118 A1 WO2011135118 A1 WO 2011135118A1 ES 2011000023 W ES2011000023 W ES 2011000023W WO 2011135118 A1 WO2011135118 A1 WO 2011135118A1
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WO
WIPO (PCT)
Prior art keywords
blades
grinding
rotor
wheel
movement
Prior art date
Application number
PCT/ES2011/000023
Other languages
Spanish (es)
French (fr)
Inventor
Olatz Astigarraga Castañares
GONZÁLEZ José Ignacio MARQUÍNEZ
Original Assignee
Danobat, S. Coop.
Ideko, S. Coop.
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 Danobat, S. Coop., Ideko, S. Coop. filed Critical Danobat, S. Coop.
Publication of WO2011135118A1 publication Critical patent/WO2011135118A1/en

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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
    • 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

Definitions

  • the present invention relates to the grinding of rotor blade blades, proposing a device that is especially indicated for the grinding of the edges of the blades of rotor blades of the blisk type, as well as the method for carrying out said grinding.
  • the rotors and compressors of the turbines are formed by rotor discs that have a plurality of blade-shaped conformations, called blades, on their outer surface.
  • blades are manufactured independently of the discs and subsequently coupled to them, but for a few years, the use of single-piece rotary discs that are called blisk, in which the blades are obtained by machining, is becoming widespread from the disc itself.
  • Both the blisk-type rotary discs, as well as conventional rotary discs must be subjected to an edge grinding process that determines the blades at the tip, and said grinding process must be carried out with the discs already mounted on the rotor, to achieve correct concentricity.
  • the patent EP 2030719 proposes a method and a device for the grinding of the edges of blades of conventional rotary discs and blisk type in a same process.
  • the grinding of blades of conventional rotor disc blades is carried out in such a way that said discs rotate on its axis at high speed, while for the grinding of blades of blades of blisk type rotary discs the rotational speed is decreased .
  • Patent EP 1990131 discloses a method and a device for grinding blades of blades of blisk-type rotary discs where grinding is carried out by blade blade and where, in addition to the wheel's rotational movement, Five other movements are involved in the grinding process.
  • the rotary discs are mounted on a support that allows them to rotate on their own axis, in order to successively face the tip of each blade of each disc with respect to the wheel, at which time said movement is blocked of rotation to proceed to the grinding of the tip of the blade.
  • the rotational movement of the disc does not intervene in the grinding process, being performed only for the positioning of the blade prior to its rectification.
  • the rotor disk remains static while the tool is in an arrangement that performs five movements; the head on which the wheel is arranged makes a vertical translation movement on the column in which it is mounted and a tilting movement around a horizontal axis, normal to the vertical axis of the column, while the column by its part performs a spinning movement around its vertical axis and with respect to the car on which it is mounted, this car can move longitudinally and transversely on the device bed.
  • a device for grinding blades of rotor disc blades is proposed, especially designed for grinding blades of rotor blades of the blisk type, as well as the method for carrying out said grinding.
  • the device object of the invention allows to solve in a simpler way than the known devices, the problem of the vibrations that are generated in the blades during the grinding process and that can damage the structure of said blades, also influencing negatively in the precision of the grinding and in the concentricity that is achieved.
  • the rotor discs are mounted on a support that allows them to rotate on their own axis, to successively face the tip of each blade of each disc with respect to the wheel, but once said positioning movement has been made, unlike the solution of EP Patent 1990131, the The rotation of the disc is not blocked, but actively intervenes in the process of rectifying the corresponding blade, said rotation being interpolated with a transverse translation movement with respect to the bed, which is carried out by a carriage that supports a column in the that the head containing the tool is arranged, and with another longitudinal translation movement, also with respect to the bench, which can also be made by the same carriage or by the support on which the rotor discs are mounted.
  • the solution object of the invention results in certain advantageous features, acquiring its own life and preferential character with respect to known solutions.
  • Figure 1 is a view of the grinding device according to the invention, showing a blade of a rotor disk in a position prior to the start of the grinding process.
  • Figures 2a and 2b correspond to individual views of the grinding device, in which a blade of a rotor disk is shown in the initial and final grinding of its edge.
  • Figure 3a shows a detail of a specific grinding wheel with respect to a blade to be rectified, in a position prior to the start of the grinding process.
  • Figures 3b and 3c show individual positions of the detail of the previous figure in the initial and final positions of the grinding on the end edge of the blade.
  • the object of the present invention is related to grinding blades of turbine rotor blades, proposing a solution that, thanks to its constructive and functional characteristics, does not generate vibrations in the blades and allows obtaining a good concentricity and precision in grinding of blades of rotor blades of blisk type.
  • the solution object of the invention comprises a bed (1), on which a mobile carriage (2), carrying a column (3) on which a head (4) containing a wheel (5) is mounted.
  • the mobile carriage (2) is able to move on the bed (1) both longitudinally and transversely in the directions (X) and (Z) respectively, dragging the column (3) that is fixed by its base to said carriage ( 2).
  • the head (4) is mounted on the upper end of the column (3) in an arrangement that allows it to swing according to a movement (A), around an axis perpendicular to the column (3).
  • the rotor discs that involve the blades (6) to be rectified are arranged mounted on a mobile support (not shown), which, in addition to allowing the rotation of said rotor discs around its own axis according to a movement (C), you can also move on the bench (1) in the direction (Z).
  • the wheel (5) Before starting the grinding process, the wheel (5) is positioned at one of the ends of the edge of the blade (6) to be ground, point from which the edge will begin to be ground.
  • the wheel (5) must track the edge of the blade (6), which is achieved by interpolating the rotational movement of the rotor discs with the carriage translation movement (2) in the direction ( X), and with a longitudinal translation movement in the direction (Z), which can be carried out either by the carriage (2) or by the rotating discs by means of the translation of the mobile support in which they are arranged.
  • the tilting movement of the head (4) does not intervene in the grinding process and is only used in the positioning of the wheel with respect to the blade (6) to be rectified, after which the head remains static until the next positioning movement.
  • the support on which the rotor discs are arranged rotates to face the next blade (6) to be rectified, with respect to the wheel (5), which is positioned at the end of the edge of the blade (6) and then begin grinding.
  • the grinding process is performed at the blade and the rotary movement of the rotor discs is produced only to help the wheel (5) to track the entire edge of the blade (6) that is rectified. , without rotating continuously, and thus avoiding the generation of radial forces in the blades (6) when coming into contact with the wheel (5).
  • the wheel (5) is a wheel of the type of punctual support, so that there is only one point of contact between the wheel (5) and the edge of the blade (6), which forces to have to make more than one pass over the edge of each blade to complete its grinding.
  • Figure 3 shows a molar (5) of punctual support, this n being an illustrative and non-limiting example of this type of roads.
  • an initial roughing can be carried out, prior to grinding, by means of a conventional milling cutter that would be coupled to the head instead of the wheel (5).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The invention relates to a device for grinding the blades of rotor discs and to the associated grinding method, said device comprising a bed plate (1) having a carriage (2) mounted thereon, which carriage can move transversally and longitudinally in directions X and Z. In addition, a column (3) is provided on the carriage (2), said column having a head (4) mounted thereon that incorporates a rotary grinding wheel (5) for grinding the edges of the blades (6) of blisk-type rotor discs placed on a moveable supporting element that can rotate the rotor discs and move same in direction Z. Moreover, the edges of the blades (6) are tracked during grinding by means of interpolation of the rotation of the rotor disc and movement of the grinding wheel (5) in directions X and Z.

Description

DISPOSITIVO PARA EL RECTIFICADO DE ALABES DE DISCOS ROTORES Y MÉTODO PARA LLEVAR A CABO DICHO RECTIFICADO  DEVICE FOR THE RECTIFICATION OF RABBIT DISCS WRENCHES AND METHOD FOR CARRYING OUT RECTIFIED SUCH
Sector de la técnica  Technical sector
La presente invención está relacionada con el rectificado de álabes de discos rotores, proponiendo un dispositivo que resulta especialmente indicado para la rectificación de los bordes de las puntas de álabes de discos rotores de tipo blisk, así como el método para llevar a cabo dicho rectificado. The present invention relates to the grinding of rotor blade blades, proposing a device that is especially indicated for the grinding of the edges of the blades of rotor blades of the blisk type, as well as the method for carrying out said grinding.
Estado de la técnica State of the art
Los rotores y compresores de las turbinas están formados por discos rotores que presentan en su superficie exterior una pluralidad de conformaciones a modo de palas, llamadas álabes. Convencionalmente, estos álabes se fabrican de manera independiente a los discos y posteriormente se acoplan a éstos, pero desde hace unos años, se está generalizando la utilización de discos rotores monopieza que reciben el nombre de blisk, en los que los álabes se obtienen por mecanizado a partir del propio disco. The rotors and compressors of the turbines are formed by rotor discs that have a plurality of blade-shaped conformations, called blades, on their outer surface. Conventionally, these blades are manufactured independently of the discs and subsequently coupled to them, but for a few years, the use of single-piece rotary discs that are called blisk, in which the blades are obtained by machining, is becoming widespread from the disc itself.
Tanto los discos rotores de tipo blisk, como los discos rotores convencionales deben ser sometidos a un proceso de rectificado del borde que determinan en la punta los álabes, y dicho proceso de rectificado debe realizarse con los discos ya montados en el rotor, para lograr una correcta concentricidad . Both the blisk-type rotary discs, as well as conventional rotary discs must be subjected to an edge grinding process that determines the blades at the tip, and said grinding process must be carried out with the discs already mounted on the rotor, to achieve correct concentricity.
En el caso de los discos rotores convencionales, son conocidos dispositivos y métodos de rectificado de los bordes de los álabes, en los cuales los discos rotan sobre su eje a alta velocidad, lo cual genera esfuerzos radiales en los álabes debido a la fuerza centrifuga cuando la muela entra en contacto con las puntas de dichos álabes. Estos esfuerzos radiales provocan vibraciones en los álabes, que son absorbidas por la amortiguación que genera el propio montaje de los álabes en sus ranuras. In the case of conventional rotor discs, devices and methods of grinding the edges of the blades are known, in which the discs they rotate on its axis at high speed, which generates radial forces on the blades due to the centrifugal force when the wheel comes into contact with the tips of said blades. These radial forces cause vibrations in the blades, which are absorbed by the damping generated by the assembly of the blades in their grooves.
Sin embargo, estas soluciones de rectificado, no son apropiadas para el rectificado de bordes de álabes de discos rotores de tipo blisk, ya que en este caso los álabes y el disco constituyen una misma pieza, lo que confiere a la unión entre el disco y los álabes de una mayor rigidez que en el caso de los discos rotores convencionales. Debido a esto, los álabes son incapaces de amortiguar las vibraciones generadas por los esfuerzos radiales generados durante el proceso de rectificado, las cuales impiden el mecanizado correcto que se obtiene con el rectificado y pueden provocar daños en la propia estructura de los álabes. However, these grinding solutions are not suitable for grinding blades of blades of blisk-type rotor discs, since in this case the blades and the disc constitute the same piece, which gives the joint between the disc and the blades of greater rigidity than in the case of conventional rotor discs. Due to this, the blades are incapable of damping the vibrations generated by the radial forces generated during the grinding process, which prevent the correct machining that is obtained with the grinding and can cause damage to the blade structure itself.
Debido a esto, el rectificado de los bordes de álabes de discos rotores de tipo blisk, se ha venido realizando previamente a su montaje en el rotor y mediante rectificadoras verticales convencionales, obteniendo de esta manera un grado de precisión inadecuado en dicha rectificación, asi como una mala concentricidad con respecto al resto de los blisk o las etapas de álabes convencionales que forman parte del mismo rotor. Due to this, the grinding of the edges of blades of rotor discs of the blisk type, has been carried out prior to its assembly in the rotor and by conventional vertical grinders, thus obtaining an inadequate degree of precision in said rectification, as well as a bad concentricity with respect to the rest of the blisks or the stages of conventional blades that are part of the same rotor.
En este sentido, es conocida la patente EP 2030719, la cual propone un método y un dispositivo para el rectificado conjunto de los bordes de álabes de discos rotores convencionales y de tipo blisk en un mismo proceso. De esta manera, el rectificado de bordes de álabes de discos rotores convencionales se realiza de forma que dichos discos giran sobre su eje a alta velocidad, mientras que para el rectificado de bordes de álabes de discos rotores de tipo blisk se disminuye la velocidad de giro. In this sense, the patent EP 2030719 is known, which proposes a method and a device for the grinding of the edges of blades of conventional rotary discs and blisk type in a same process. In this way, the grinding of blades of conventional rotor disc blades is carried out in such a way that said discs rotate on its axis at high speed, while for the grinding of blades of blades of blisk type rotary discs the rotational speed is decreased .
Es conocida también la Patente EP 1990131, la cual divulga un método y un dispositivo para el rectificado de las puntas de álabes de discos rotores de tipo blisk donde el rectificado se realiza álabe a álabe y donde, además del movimiento de rotación de la muela, intervienen otros cinco movimientos en el proceso de rectificado . It is also known Patent EP 1990131, which discloses a method and a device for grinding blades of blades of blisk-type rotary discs where grinding is carried out by blade blade and where, in addition to the wheel's rotational movement, Five other movements are involved in the grinding process.
Asi, en esta solución los discos rotores van montados en un soporte que les permite girar sobre su propio eje, para de esta manera ir encarando sucesivamente la punta de cada álabe de cada disco con respecto a la muela, momento en que se bloquea dicho movimiento de giro para proceder al rectificado de la punta del álabe. De esta forma, el movimiento de rotación del disco no interviene en el proceso de rectificado, realizándose únicamente para el posicionamiento del álabe previo a su rectificación. Thus, in this solution the rotary discs are mounted on a support that allows them to rotate on their own axis, in order to successively face the tip of each blade of each disc with respect to the wheel, at which time said movement is blocked of rotation to proceed to the grinding of the tip of the blade. In this way, the rotational movement of the disc does not intervene in the grinding process, being performed only for the positioning of the blade prior to its rectification.
De este modo, durante dicho proceso de rectificado, el disco rotor permanece estático mientras que la herramienta va en una disposición que realiza cinco movimientos; el cabezal en el que va dispuesta la muela realiza un movimiento de traslación vertical sobre la columna en la que va montado y un movimiento de basculación en torno a un eje horizontal, normal al eje vertical de la columna, en tanto que la columna por su parte realiza un movimiento de giro en torno a su eje vertical y con respecto al carro sobre el que va montada, pudiendo este carro desplazarse longitudinal y transversalmente sobre la bancada del dispositivo. Thus, during said grinding process, the rotor disk remains static while the tool is in an arrangement that performs five movements; the head on which the wheel is arranged makes a vertical translation movement on the column in which it is mounted and a tilting movement around a horizontal axis, normal to the vertical axis of the column, while the column by its part performs a spinning movement around its vertical axis and with respect to the car on which it is mounted, this car can move longitudinally and transversely on the device bed.
Objeto de la invención Object of the invention
De acuerdo con la invención se propone un dispositivo para el rectificado de bordes de álabes de discos rotores, especialmente diseñado para el rectificado de bordes de álabes de discos rotores de tipo blisk, asi como el método para llevar a cabo dicho rectificado . According to the invention, a device for grinding blades of rotor disc blades is proposed, especially designed for grinding blades of rotor blades of the blisk type, as well as the method for carrying out said grinding.
El dispositivo objeto de la invención, permite resolver de una manera más sencilla que los dispositivos conocidos, el problema de las vibraciones que se generan en los álabes durante el proceso de rectificado y que pueden dañar la estructura de dichos álabes, influyendo además de forma negativa en la precisión del rectificado y en la concentricidad que se consigue . The device object of the invention, allows to solve in a simpler way than the known devices, the problem of the vibrations that are generated in the blades during the grinding process and that can damage the structure of said blades, also influencing negatively in the precision of the grinding and in the concentricity that is achieved.
En este sentido, se presenta una solución para el rectificado de bordes de álabes en la que, además del movimiento de rotación de la muela, intervienen otros tres movimientos en el proceso de rectificado. In this sense, a solution for the grinding of blade edges is presented in which, in addition to the wheel's rotation movement, three other movements are involved in the grinding process.
Asi, al igual que en la solución propuesta por la Patente EP 1990131, en la solución objeto de la presente invención, los discos rotores van montados en un soporte que les permite girar sobre su propio eje, para ir encarando sucesivamente la punta de cada álabe de cada disco con respecto a la muela, pero una vez realizado dicho movimiento de posicionamiento, a diferencia de la solución de la Patente EP 1990131, el giro del disco no queda bloqueado, sino que interviene activamente en el proceso de rectificado del álabe correspondiente, siendo interpolado dicho giro con un movimiento de translación transversal respecto de la bancada, que es realizado por un carro que sirve de soporte a una columna en la que va dispuesto el cabezal que contiene la herramienta, y con otro movimiento de translación longitudinal, también respecto de la bancada, que puede ser realizado también por el mismo carro o bien por el soporte sobre el que se montan los discos rotores. Thus, as in the solution proposed by EP Patent 1990131, in the solution object of the present invention, the rotor discs are mounted on a support that allows them to rotate on their own axis, to successively face the tip of each blade of each disc with respect to the wheel, but once said positioning movement has been made, unlike the solution of EP Patent 1990131, the The rotation of the disc is not blocked, but actively intervenes in the process of rectifying the corresponding blade, said rotation being interpolated with a transverse translation movement with respect to the bed, which is carried out by a carriage that supports a column in the that the head containing the tool is arranged, and with another longitudinal translation movement, also with respect to the bench, which can also be made by the same carriage or by the support on which the rotor discs are mounted.
De esta manera, en la solución de la invención, solamente intervienen tres movimientos en el proceso de rectificado, siendo uno de estos movimientos el giro del disco rotor, mientras que en la solución divulgada por la Patente EP 1990131, intervienen cinco movimientos en el proceso de rectificado permaneciendo estático el disco rotor durante dicho proceso. Thus, in the solution of the invention, only three movements are involved in the grinding process, one of these movements being the rotation of the rotor disk, while in the solution disclosed by EP Patent 1990131, five movements are involved in the process of grinding while the rotor disk remains static during said process.
Por todo ello, la solución objeto de la invención resulta de unas características ciertamente ventajosas, adquiriendo vida propia y carácter preferente respecto de las soluciones conocidas. Therefore, the solution object of the invention results in certain advantageous features, acquiring its own life and preferential character with respect to known solutions.
Descripción de las figuras Description of the figures
La figura 1 es una vista del dispositivo de rectificado según la invención, en donde se muestra un álabe de un disco rotor en una posición previa al comienzo del proceso de rectificado. Figure 1 is a view of the grinding device according to the invention, showing a blade of a rotor disk in a position prior to the start of the grinding process.
Las figuras 2a y 2b corresponden a sendas vistas del dispositivo de rectificado, en las que se muestra un álabe de un disco rotor en las posiciones inicial y final del rectificado de su borde. Figures 2a and 2b correspond to individual views of the grinding device, in which a blade of a rotor disk is shown in the initial and final grinding of its edge.
La figura 3a muestra un detalle de una muela de apoyo puntual respecto de un álabe a rectificar, en una posición previa al comienzo del proceso de rectificado. Figure 3a shows a detail of a specific grinding wheel with respect to a blade to be rectified, in a position prior to the start of the grinding process.
Las figuras 3b y 3c muestran sendas posiciones del detalle de la figura anterior en las posiciones inicial y final del rectificado sobre el borde extremo del álabe . Figures 3b and 3c show individual positions of the detail of the previous figure in the initial and final positions of the grinding on the end edge of the blade.
Descripción detallada de la invención Detailed description of the invention
El objeto de la presente invención está relacionado con el rectificado de bordes de álabes de discos rotores de turbinas, proponiendo una solución que gracias a sus características constructivas y funcionales, no genera vibraciones en los álabes y permite obtener una buena concentricidad y precisión en el rectificado de bordes de álabes de discos rotores de tipo blisk. The object of the present invention is related to grinding blades of turbine rotor blades, proposing a solution that, thanks to its constructive and functional characteristics, does not generate vibrations in the blades and allows obtaining a good concentricity and precision in grinding of blades of rotor blades of blisk type.
La solución objeto de la invención comprende una bancada (1), sobre la que va dispuesto un carro (2) móvil, portador de una columna (3) en la que va montado un cabezal (4) que contiene una muela (5). El carro móvil (2) es capaz de desplazarse sobre la bancada (1) tanto longitudinal como transversalmente en las direcciones (X) y (Z) respectivamente, arrastrando a la columna (3) que se encuentra fijada por su base a dicho carro (2). El cabezal (4) va montado en el extremo superior de la columna (3) en una disposición que le permite bascular según un movimiento (A) , en torno a un eje perpendicular a la columna (3) . Por su parte, los discos rotores que comportan a los álabes (6) a rectificar, se disponen montados en un soporte móvil (no mostrado) , el cual, además de permitir la rotación de dichos discos rotores en torno a su propio eje según un movimiento (C) , también puede moverse sobre la bancada (1) en la dirección (Z) . The solution object of the invention comprises a bed (1), on which a mobile carriage (2), carrying a column (3) on which a head (4) containing a wheel (5) is mounted. The mobile carriage (2) is able to move on the bed (1) both longitudinally and transversely in the directions (X) and (Z) respectively, dragging the column (3) that is fixed by its base to said carriage ( 2). The head (4) is mounted on the upper end of the column (3) in an arrangement that allows it to swing according to a movement (A), around an axis perpendicular to the column (3). On the other hand, the rotor discs that involve the blades (6) to be rectified, are arranged mounted on a mobile support (not shown), which, in addition to allowing the rotation of said rotor discs around its own axis according to a movement (C), you can also move on the bench (1) in the direction (Z).
Antes de comenzar con el proceso de rectificado, se posiciona la muela (5) en uno de los extremos del borde del álabe (6) a rectificar, punto desde donde se comenzará a rectificar dicho borde. Para el rectificado, la muela (5) debe realizar un seguimiento del borde del álabe (6), lo que se consigue mediante la interpolación del movimiento de rotación de los discos rotores con el movimiento de traslación del carro (2) en la dirección (X) , y con un movimiento de traslación longitudinal en la dirección (Z), que puede ser realizado o bien por el carro (2) o bien por los discos rotores mediante la traslación del soporte móvil en el que van dispuestos. Before starting the grinding process, the wheel (5) is positioned at one of the ends of the edge of the blade (6) to be ground, point from which the edge will begin to be ground. For grinding, the wheel (5) must track the edge of the blade (6), which is achieved by interpolating the rotational movement of the rotor discs with the carriage translation movement (2) in the direction ( X), and with a longitudinal translation movement in the direction (Z), which can be carried out either by the carriage (2) or by the rotating discs by means of the translation of the mobile support in which they are arranged.
Por su parte, el movimiento de basculación del cabezal (4), no interviene en el proceso de rectificado y solo se usa en el posicionamiento de la muela respecto del álabe (6) a rectificar, tras lo cual el cabezal permanece estático hasta el próximo movimiento de posicionamiento. On the other hand, the tilting movement of the head (4), does not intervene in the grinding process and is only used in the positioning of the wheel with respect to the blade (6) to be rectified, after which the head remains static until the next positioning movement.
Tras la finalización del rectificado del borde de un álabe (6), el soporte sobre el que se disponen los discos rotores, rota para encarar el siguiente álabe (6) a rectificar, con respecto a la muela (5), la cual se posiciona en el extremo del borde del álabe (6) para a continuación comenzar el rectificado. De esta manera, el proceso de rectificado se realiza álabe a álabe y el movimiento de rotación de los discos rotores se produce únicamente para contribuir a que la muela (5) pueda realizar un seguimiento de todo el borde del álabe (6) que se rectifica, sin rotar de manera continua, y evitando asi la generación de esfuerzos radiales en los álabes (6) al entrar en contacto con la muela (5) . After finishing the grinding of the edge of a blade (6), the support on which the rotor discs are arranged, rotates to face the next blade (6) to be rectified, with respect to the wheel (5), which is positioned at the end of the edge of the blade (6) and then begin grinding. In this way, the grinding process is performed at the blade and the rotary movement of the rotor discs is produced only to help the wheel (5) to track the entire edge of the blade (6) that is rectified. , without rotating continuously, and thus avoiding the generation of radial forces in the blades (6) when coming into contact with the wheel (5).
Se prevé que la muela (5) sea una muela del tipo de apoyo puntual, de manera que solo exista un punto de contacto entre la muela (5) y el borde del álabe (6), lo cual obliga a tener que realizar más de una pasada sobre el borde de cada álabe para completar su rectificado. En la figura 3 se muestra una muela (5) de apoyo puntual, siendo este n ejemplo ilustrativo y no limitativo de este tipo de rr uelas . It is expected that the wheel (5) is a wheel of the type of punctual support, so that there is only one point of contact between the wheel (5) and the edge of the blade (6), which forces to have to make more than one pass over the edge of each blade to complete its grinding. Figure 3 shows a molar (5) of punctual support, this n being an illustrative and non-limiting example of this type of roads.
Se prevé también, opcionalmente, que en el borde de los álabes (6) pueda realizarse un desbaste inicial, previo al rectificado, mediante una fresa convencional que iría acoplada en el cabezal en lugar de la muela (5) . It is also provided, optionally, that at the edge of the blades (6) an initial roughing can be carried out, prior to grinding, by means of a conventional milling cutter that would be coupled to the head instead of the wheel (5).

Claims

REIVINDICACIONES
1. - Dispositivo para el rectificado de álabes de discos rotores, destinado para la rectificación de bordes de álabes (6) de discos rotores de tipo blisk, caracterizado en que consta de una bancada (1) sobre la que se dispone un carro (2) capaz de moverse transversal y longitudinalmente sobre dicha bancada (1) según sendas direcciones (X) y (Z), un cabezal (4) montado en una columna (3) que va fijada por su base al carro (2), una muela (5) que va montada en el cabezal (4) con posibilidad de girar sobre su propio eje y un soporte móvil en el que se disponen los discos rotores incorporados en el rotor correspondiente, siendo este soporte capaz de hacer girar a los discos rotores en torno a su propio eje y llevarlos en desplazamiento sobre la bancada (1) en la dirección longitudinal (Z) . 1. - Device for grinding blades of rotor disks, intended for grinding blades of blades (6) of rotor disks of blisk type, characterized in that it consists of a bench (1) on which a carriage (2) is arranged. ) capable of moving transversely and longitudinally on said bed (1) according to both directions (X) and (Z), a head (4) mounted on a column (3) that is fixed by its base to the carriage (2), a wheel (5) which is mounted on the head (4) with the possibility of rotating on its own axis and a mobile support on which the rotor discs incorporated in the corresponding rotor are arranged, this support being able to rotate the rotor discs in around its own axis and move them on the bench (1) in the longitudinal direction (Z).
2. - Dispositivo para el rectificado de álabes de discos rotores, de acuerdo con la primera reivindicación, caracterizado en que la muela (5) presenta un borde de ataque que determina un apoyo puntual de rectificado sobre los álabes (6) . 2. - Device for grinding blades of rotor discs, according to the first claim, characterized in that the wheel (5) has a leading edge that determines a specific grinding support on the blades (6).
3.- Método para el rectificado de álabes de discos rotores, destinado para la rectificación de bordes de álabes (6) de discos rotores de tipo blisk, caracterizado en que los bordes de los álabes (6) son rectificados uno a uno mediante una muela (5) de apoyo puntual, la cual rota sobre su propio eje, realizando durante el proceso de rectificado un seguimiento del borde del álabe (6), mediante la interpolación de un movimiento de giro del disco rotor sobre su propio eje, un movimiento de desplazamiento transversal de la muela (5) en una dirección (X) y un movimiento de desplazamiento longitudinal de la propia muela (5) en una dirección (Z) . 3.- Method for grinding blades of rotor disks, intended for grinding blades of blades (6) of rotor blades of the blisk type, characterized in that the edges of the blades (6) are ground one by one by means of a wheel (5) punctual support, which rotates on its own axis, during the grinding process tracking the edge of the blade (6), by interpolating a rotational movement of the rotor disk on its own axis, a movement of transverse displacement of the wheel (5) in one direction (X) and a movement of longitudinal displacement of the wheel itself (5) in one direction (Z).
4.- Método para el rectificado de álabes de discos rotores, de acuerdo con la tercera reivindicación, caracterizado en que el movimiento de desplazamiento longitudinal de la muela (5) en la dirección (Z) puede ser sustituido por un movimiento de desplazamiento longitudinal del disco rotor en dicha dirección (Z), siendo interpolando este movimiento con el giro del disco rotor y con el desplazamiento transversal de la muela (5) en la dirección (X) . 4. Method for the grinding of rotor disc blades, according to the third claim, characterized in that the movement of longitudinal movement of the wheel (5) in the direction (Z) can be replaced by a movement of longitudinal movement of the rotor disk in said direction (Z), this movement being interpolated with the rotation of the rotor disk and with the transverse displacement of the wheel (5) in the direction (X).
PCT/ES2011/000023 2010-04-27 2011-02-09 Device for grinding the blades of rotor discs and associated grinding method WO2011135118A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201000536 2010-04-27
ES201000536A ES2368242B1 (en) 2010-04-27 2010-04-27 DEVICE FOR RECTIFYING ROTOR DISK BLADES AND METHOD FOR CARRYING OUT RECTIFIED SUCH.

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WO2011135118A1 true WO2011135118A1 (en) 2011-11-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924181A (en) * 2015-05-07 2015-09-23 北京航空航天大学 Method and device for achieving full-profile grinding of blades with tenons through cylindrical coordinate three-axis linkage machine tool

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4813187A (en) * 1986-07-29 1989-03-21 Korber Ag Method of grinding arcuate surfaces of workpieces
US5035088A (en) * 1986-07-22 1991-07-30 Ex-Cell-O Gmbh Machine tool
EP0592112A1 (en) * 1992-09-09 1994-04-13 NEWALL MANUFACTURING TECHNOLOGY LIMITED (Formerly known as BUTLER NEWALL LIMITED) Improvements in or relating to methods of grinding blade tips of turbine/compressor rotors
US6200200B1 (en) * 1996-05-23 2001-03-13 Erwin Junker Maschinenfabrik Gmbh Method and device for non-circular grinding of cam shapes with concave flanks
WO2001045898A1 (en) * 1999-12-22 2001-06-28 Newall International Limited De-burring method and apparatus
US20080280546A1 (en) * 2007-05-08 2008-11-13 Rainer Mielke Method and apparatus for grinding the blade tips of a rotor wheel in Blisk design

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035088A (en) * 1986-07-22 1991-07-30 Ex-Cell-O Gmbh Machine tool
US4813187A (en) * 1986-07-29 1989-03-21 Korber Ag Method of grinding arcuate surfaces of workpieces
EP0592112A1 (en) * 1992-09-09 1994-04-13 NEWALL MANUFACTURING TECHNOLOGY LIMITED (Formerly known as BUTLER NEWALL LIMITED) Improvements in or relating to methods of grinding blade tips of turbine/compressor rotors
US6200200B1 (en) * 1996-05-23 2001-03-13 Erwin Junker Maschinenfabrik Gmbh Method and device for non-circular grinding of cam shapes with concave flanks
WO2001045898A1 (en) * 1999-12-22 2001-06-28 Newall International Limited De-burring method and apparatus
US20080280546A1 (en) * 2007-05-08 2008-11-13 Rainer Mielke Method and apparatus for grinding the blade tips of a rotor wheel in Blisk design

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924181A (en) * 2015-05-07 2015-09-23 北京航空航天大学 Method and device for achieving full-profile grinding of blades with tenons through cylindrical coordinate three-axis linkage machine tool

Also Published As

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ES2368242A1 (en) 2011-11-15
ES2368242B1 (en) 2012-09-17

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