WO2011135118A1 - Dispositif pour la rectification des aubes de disques de rotors et procédé pour mettre en oeuvre ladite rectification - Google Patents

Dispositif pour la rectification des aubes de disques de rotors et procédé pour mettre en oeuvre ladite rectification 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
Authority
WO
WIPO (PCT)
Prior art keywords
blades
grinding
rotor
wheel
movement
Prior art date
Application number
PCT/ES2011/000023
Other languages
English (en)
Spanish (es)
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/fr

Links

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).

Landscapes

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

Abstract

L'invention concerne un dispositif pour la rectification des aubes de disques de rotors et un procédé pour mettre en oeuvre ladite rectification. Le dispositif comprend un bâti (1) sur lequel est disposé un chariot (2) pouvant être déplacé dans les sens transversal et longitudinal dans les deux directions (X) et (Z), ledit chariot (2) comprenant une colonne (3) dans laquelle est montée une tête (4) qui comporte une meule (5) rotative, pour la rectification des bords des aubes (6) de disques de rotors de type blisk, lesquels sont disposés dans un support mobile qui peut faire tourner lesdits disques de rotors et les déplacer dans la direction (Z), un suivi des bords des aubes (6) étant effectué lors de la rectification par interpolation de rotation du disque de rotor et déplacement de la meule (5) dans les directions (X) et (Z).
PCT/ES2011/000023 2010-04-27 2011-02-09 Dispositif pour la rectification des aubes de disques de rotors et procédé pour mettre en oeuvre ladite rectification WO2011135118A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201000536A ES2368242B1 (es) 2010-04-27 2010-04-27 Dispositivo para el rectificado de álabes de discos rotores y método para llevar a cabo dicho rectificado.
ESP201000536 2010-04-27

Publications (1)

Publication Number Publication Date
WO2011135118A1 true WO2011135118A1 (fr) 2011-11-03

Family

ID=44851685

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2011/000023 WO2011135118A1 (fr) 2010-04-27 2011-02-09 Dispositif pour la rectification des aubes de disques de rotors et procédé pour mettre en oeuvre ladite rectification

Country Status (2)

Country Link
ES (1) ES2368242B1 (fr)
WO (1) WO2011135118A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924181A (zh) * 2015-05-07 2015-09-23 北京航空航天大学 一种利用圆柱坐标三轴联动机床实现带榫头叶片全型面磨削的方法和装置

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 (fr) * 1992-09-09 1994-04-13 NEWALL MANUFACTURING TECHNOLOGY LIMITED (Formerly known as BUTLER NEWALL LIMITED) Méthodes de rectification de l'extrêmité des aubes de rotors de turbines ou compresseurs
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 (fr) * 1999-12-22 2001-06-28 Newall International Limited Procede et appareil de rectification
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 (fr) * 1992-09-09 1994-04-13 NEWALL MANUFACTURING TECHNOLOGY LIMITED (Formerly known as BUTLER NEWALL LIMITED) Méthodes de rectification de l'extrêmité des aubes de rotors de turbines ou compresseurs
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 (fr) * 1999-12-22 2001-06-28 Newall International Limited Procede et appareil de rectification
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 (zh) * 2015-05-07 2015-09-23 北京航空航天大学 一种利用圆柱坐标三轴联动机床实现带榫头叶片全型面磨削的方法和装置

Also Published As

Publication number Publication date
ES2368242A1 (es) 2011-11-15
ES2368242B1 (es) 2012-09-17

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