EP0393567A1 - Method and apparatus for riveting a shroud ring to the blade tips of a bladed rotor - Google Patents

Method and apparatus for riveting a shroud ring to the blade tips of a bladed rotor Download PDF

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Publication number
EP0393567A1
EP0393567A1 EP90107230A EP90107230A EP0393567A1 EP 0393567 A1 EP0393567 A1 EP 0393567A1 EP 90107230 A EP90107230 A EP 90107230A EP 90107230 A EP90107230 A EP 90107230A EP 0393567 A1 EP0393567 A1 EP 0393567A1
Authority
EP
European Patent Office
Prior art keywords
riveting
head
axis
wheel
bandage
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.)
Granted
Application number
EP90107230A
Other languages
German (de)
French (fr)
Other versions
EP0393567B1 (en
Inventor
Marcel Demichel
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0393567A1 publication Critical patent/EP0393567A1/en
Application granted granted Critical
Publication of EP0393567B1 publication Critical patent/EP0393567B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/14—Riveting machines specially adapted for riveting specific articles, e.g. brake lining machines
    • B21J15/145—Turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/14—Riveting machines specially adapted for riveting specific articles, e.g. brake lining machines
    • 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
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49321—Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49336—Blade making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/5377—Riveter
    • Y10T29/53774—Single header

Definitions

  • the present invention relates to a method and a device for riveting a bandage on the fins of a rotor wheel in order to bind them together, each fin comprising at its top one or more studs insertable in one or more holes of the tire, said studs making an acute angle c with the median plane of the wheel orthogonal to the axis of the rotor.
  • US Pat. No. 4,437,213 describes an automatic method of riveting a bandage on a fin wheel with radial lugs in which the wheel is deployed in front of a riveting head which has a forward movement, then withdrawing in the radial direction after each riveting. This process is inapplicable when the studs make an angle with the plane of the wheel because there would be deformation of the fins during riveting and this could not take place. This is why currently such riveting is carried out manually using a pneumatic gun or any other equivalent shock device.
  • the method according to the invention allowing regular, repetitive riveting without medical or legislative restrictions is characterized in that a riveting head is adjusted for a determined wheel so, on the one hand, that it can move according to a circular motion passing in the vicinity of the vertices, fins of the wheel and, on the other hand, that when it is above a tenon, its axis is in the extension of the axis of the tenon, then we performs the following group of riveting operations: - we center a first tenon in front of the riveting head, - we clamp the vertical and horizontal movements of the head, - a group of fins is clamped together comprising the fin to be bandaged with the riveting head, - the bandage is clamped against the top of the fin, - we rivet the post, - we unclamp the bandage and the group of fins, - we unleash the vertical and horizontal movements of the head, - then the head is moved so as to bring a second tenon in front of the riveting head, -
  • the flanges fixed on the riveting head are interchangeable and are only used for studs having a given inclination with the axis of the fin, that is to say with the vertical plane orthogonal to the axis of the rotor which is horizontal .
  • the flanges have vertical end portions which carry jaws which block the pack of fins.
  • the riveting head is provided with a tip and a cylinder which comes to apply the tip against the bandage to press it on the fin during riveting.
  • FIG. 1 represents a view of fins 1 forming part of a packet 2 of fins (see FIG. 2) each fin has at its top 3 several studs 4.
  • the studs 4 can be inserted into the holes 5 of a bandage 6 .
  • the pins 4 make a determined angle c with the vertical plane of symmetry of the fin wheel 7.
  • the riveting device 8 (see FIGS. 3 to 5) comprises a riveting head 9 provided with a dowel 10.
  • the riveting head 9 can be moved in translation parallel to its axis with respect to a plate 11 thanks to a slide 12 (see FIG. 4) and to a motor 13.
  • the plate 11 can rotate in rotation about an axis perpendicular to the axis of the head 9 relative to a carriage 14. This axis is vertical in the device shown in Figures 3 to 5.
  • the plate 11 is blocked relative to the carriage 14 by two screws 15 and by two pins 15 ′.
  • the carriage 14 is provided with rollers 16 which move on the edges of two vertical circular segments 17 integral with two vertical uprights of a support 18. It also includes rollers 19 which move on the surface of the vertical uprights 34.
  • an endless screw 20 is used fixed at one end to the carriage 14 and at the other to a motor 21 mounted by a ball joint on the support 18.
  • the segments 17 are arranged in vertical planes perpendicular to the axis of the rotor xx 'so that the carriage 14 describes a circular movement parallel to the periphery of the rotor wheel on which the tires 6 are fixed.
  • the support 18 is mounted on a horizontal base 22 with respect to which it can move horizontally in two directions, one parallel to the axis of the rotor and the other perpendicular to this axis.
  • the plate 11 is oriented so that the axis of the riveting head 9 makes with the vertical plane P orthogonal to the axis of the rotor an angle c equal to the angle made by the axis of the tenons 4 with the same plane .
  • the inclined parts 24 are parallel to the plane P and the flanges 23 are parallel to the axis of the head 9. These flanges 23 were chosen taking into account the angle c of inclination of the let's stick 4.
  • a jaw 25 movable parallel to the axis of the rotor by a motor 26 is mounted on the inclined part 24 of the flange 23 receiving the maximum forces during riveting.
  • a second movable jaw 27 also parallel to the axis of the rotor by a jack 28. Thanks to the motor 26 and the transmission system, the jaw 25 is completely immobilized in axial displacement for the duration of the riveting despite all the efforts it takes.
  • an end piece 29 and an annular jack 30 At the top of the head 9 are mounted an end piece 29 and an annular jack 30.
  • the jack 30 moves the end piece 29 parallel to the axis of the head 9.
  • This end piece 29 is provided with an opening 31 allowing the chuck 10 to pass as well as the studs 4. On the two edges of the opening are fixed two removable plates (not shown) which come to apply the bandage against the top of the fin on either side of the studs.
  • the riveting head 9 is a known head, in which the bolt 10 describes a rosette by applying a given force during riveting and is animated by a movement of advance before riveting and of recoiling after.
  • a retractable endoscope 32 In front of the bolt 10 is mounted a retractable endoscope 32 under the effect of a jack 33 mounted on the riveting head 9 by a link 35.
  • the endoscope passes through the opening 31.
  • the process according to the invention is as follows.
  • the rotor is arranged with its horizontal axis, the pack 2 of fins mounted on a wheel 7 of this rotor is brought by rotation of the rotor in a substantially horizontal position.
  • the pins 4 of the fins form an angle c with the vertical plane P of symmetry of the wheel of which the pack 2 of fins is part.
  • the endoscope 32 is adjusted on the axis of the head 9.
  • the endoscope is adjusted to the position of a tenon 4 of the horizontal fin.
  • the axis of the head 9 is thus in the extension of the axis of the tenon 4.
  • the horizontal and vertical movements of the head 9 are clamped by clamping devices (not shown).
  • the jaw 25 is applied against a group of fins (for example five fins) by operating the motor 26.
  • the other jaw 27 is applied by the jack 28 against the group of fins thus clamping this group of fins.
  • the end piece 29 is applied against the tire 6, the endoscope 32 still being in position.
  • the endoscope 32 is raised and the actual riveting is carried out.
  • the snap 10 comes into contact with the post 4 and, by a concentric movement at the periphery of the post 4, flattens the latter.
  • the duration and the force applied can be precisely adjusted to take account of the tenons used.
  • the snap 10 then automatically moves away from the stud 4.
  • the bandage 6 is unclamped by moving the end piece 29 backward.
  • the group of fins is unclamped by spreading the jaws 27 then 25; then we unbridle the vertical and horizontal movements of the riveting head 9.
  • the endoscope 32 is replaced, which is centered on another tenon 4 and so on.
  • the displacement of the riveting head 9 is easy when passing from the lug of one fin to the corresponding lug of another fin since they are located in the same vertical plane; it then suffices to move the carriage 14 along the circular segments 17 to pass from one stud 4 to another.
  • the axis of the riveting head 9 is no longer chosen in a horizontal plane passing through the axis of the rotor (where it can move by rotation of the plate) but in a plane passing through the 'axis of the rotor and making an angle close to 45 ° to 90 ° with the horizontal plane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Automatic Assembly (AREA)
  • Braking Arrangements (AREA)
  • Surgical Instruments (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Crushing And Grinding (AREA)

Abstract

Method and apparatus for riveting a shroud ring (6) to the blades (1) of a wheel (7) of a rotor, each of which comprises one or more tenons (4) capable of insertion in one or more holes (5) of the shroud ring (6), the said tenons (4) making an angle with the median plane of the wheel (7). <??>A riveting head (9) is placed in alignment with the tenon (4) to be riveted and it is held in place by two flanges (23) which clamp the group of blades (2). The head (9) is then displaced along an arc of circle or laterally in order to come in front of another tenon (4). <??>The method and apparatus allow a regular and repetitive riveting without medical or legal restriction. <IMAGE>

Description

La présente invention concerne un procédé et un dispositif de rivetage d'un bandage sur des ailettes d'une roue d'un rotor afin de les lier entre elles, chaque ailette comportant à son sommet un ou plusieurs tenons introductibles dans un ou plusieurs trous du bandage, lesdits tenons faisant un angle aigu c avec le plan médian de la roue orthogonal à l'axe du rotor.The present invention relates to a method and a device for riveting a bandage on the fins of a rotor wheel in order to bind them together, each fin comprising at its top one or more studs insertable in one or more holes of the tire, said studs making an acute angle c with the median plane of the wheel orthogonal to the axis of the rotor.

Il est décrit dans le brevet US-A- 4 437 213 un procédé automa­tique de rivetage d'un bandage sur une roue d'ailettes avec tenons radiaux dans lequel on déplaie la roue devant une tête de rivetage qui a un mouvement d'avance, puis de retrait dans le sens radial après chaque rivetage. Ce procédé est inapplicable lorsque les tenons font un angle avec le plan de la roue car il y aurait défor­mation des ailettes lors du rivetage et celui-ci ne pourrait avoir lieu. C'est pourquoi actuellement on effectue un tel rivetage manuel­lement à l'aide d'un pistolet pneumatique ou tout autre dispositif à choc équivalent.US Pat. No. 4,437,213 describes an automatic method of riveting a bandage on a fin wheel with radial lugs in which the wheel is deployed in front of a riveting head which has a forward movement, then withdrawing in the radial direction after each riveting. This process is inapplicable when the studs make an angle with the plane of the wheel because there would be deformation of the fins during riveting and this could not take place. This is why currently such riveting is carried out manually using a pneumatic gun or any other equivalent shock device.

Or, un tel procédé n'assure pas une répétitivité constante des rivetages et son application entraîne des contraintes particulières en raison des dispositions légales concernant le niveau sonore.However, such a process does not ensure constant repetition of the riveting and its application involves particular constraints due to the legal provisions concerning the sound level.

Le procédé selon l'invention permettant un rivetage régulier, répétitif et sans restriction médicale ou législative est caractérisé en ce qu'on règle une tête de rivetage pour une roue déterminée de façon, d'une part, qu'elle puisse se déplacer selon un mouvement circulaire en passant au voisinage des sommets, d'ailettes de la roue et, d'autre part, que lorsqu'elle est au-dessus d'un tenon, son axe soit dans le prolongement de l'axe du tenon, puis on procède au groupe d'opérations de rivetage suivantes :
- on centre un premier tenon devant la tête de rivetage,
- on bride les mouvements verticaux et horizontaux de la tête,
- on bride ensemble un groupe d'ailettes comprenant l'ailette à bander avec la tête de rivetage,
- on bride le bandage contre le sommet de l'ailette,
- on rivette le tenon,
- on débride le bandage et le groupe d'ailettes,
- on débride les mouvements verticaux et horizontaux de la tête,
- ensuite on déplace la tête de façon à amener un second tenon devant la tête de rivetage,
- on recommence alors au groupe d'opérations de rivetage jusqu'à ce que tous les tenons d'un bandage aient été ainsi traités.The method according to the invention allowing regular, repetitive riveting without medical or legislative restrictions is characterized in that a riveting head is adjusted for a determined wheel so, on the one hand, that it can move according to a circular motion passing in the vicinity of the vertices, fins of the wheel and, on the other hand, that when it is above a tenon, its axis is in the extension of the axis of the tenon, then we performs the following group of riveting operations:
- we center a first tenon in front of the riveting head,
- we clamp the vertical and horizontal movements of the head,
- a group of fins is clamped together comprising the fin to be bandaged with the riveting head,
- the bandage is clamped against the top of the fin,
- we rivet the post,
- we unclamp the bandage and the group of fins,
- we unleash the vertical and horizontal movements of the head,
- then the head is moved so as to bring a second tenon in front of the riveting head,
- The group of riveting operations is then started again until all the tenons of a bandage have been thus treated.

Les flasques fixés sur la tête de rivetage sont interchangeables et ne servent que pour des tenons ayant une inclinaison donnée avec l'axe de l'ailette c'est-à-dire avec le plan vertical orthogonal à l'axe du rotor qui est horizontal.The flanges fixed on the riveting head are interchangeable and are only used for studs having a given inclination with the axis of the fin, that is to say with the vertical plane orthogonal to the axis of the rotor which is horizontal .

Les flasques comportent des parties terminales verticales qui portent des mors venant bloquer le paquet d'ailettes.The flanges have vertical end portions which carry jaws which block the pack of fins.

La tête de rivetage est munie d'un embout et d'un vérin qui vient appliquer l'embout contre le bandage pour le plaquer sur l'ailette pendant le rivetage.The riveting head is provided with a tip and a cylinder which comes to apply the tip against the bandage to press it on the fin during riveting.

La présente invention sera mieux comprise à la lumière de la description qui va suivre dans laquelle.

  • La figure 1 représente une ailette avec son bandage.
  • La figure 2 représente un paquet d'ailettes avec son bandage.
  • La figure 3 représente une coupe partielle vue de dessus du dispositif de rivetage selon l'invention.
  • La figure 4 représente une vue de côté du dispositif de la figure 3.
  • La figure 5 représente une vue de devant du dispositif de la figure 4.
  • La figure 6 représente une variante du dispositif de la figure 3.
The present invention will be better understood in the light of the description which follows in which.
  • Figure 1 shows a fin with its bandage.
  • Figure 2 shows a pack of fins with its bandage.
  • Figure 3 shows a partial sectional view from above of the riveting device according to the invention.
  • FIG. 4 represents a side view of the device of FIG. 3.
  • FIG. 5 represents a front view of the device of FIG. 4.
  • FIG. 6 represents a variant of the device of FIG. 3.

La figure 1 représente une vue d'ailettes 1 faisant partie d'un paquet 2 d'ailettes (voir figure 2) chaque ailette comporte à son sommet 3 plusieurs tenons 4. Les tenons 4 sont introductibles dans les trous 5 d'un bandage 6.FIG. 1 represents a view of fins 1 forming part of a packet 2 of fins (see FIG. 2) each fin has at its top 3 several studs 4. The studs 4 can be inserted into the holes 5 of a bandage 6 .

Les tenons 4 font un angle déterminé c avec le plan vertical de symétrie de la roue d'ailettes 7.The pins 4 make a determined angle c with the vertical plane of symmetry of the fin wheel 7.

Le dispositif de rivetage 8 (voir figures 3 à 5) comporte une tête de rivetage 9 munie d'une bouterolle 10.The riveting device 8 (see FIGS. 3 to 5) comprises a riveting head 9 provided with a dowel 10.

La tête de rivetage 9 est déplaçable en translation parallèlement à son axe par rapport à un plateau 11 grâce à une glissière 12 (voir figure 4) et à un moteur 13.The riveting head 9 can be moved in translation parallel to its axis with respect to a plate 11 thanks to a slide 12 (see FIG. 4) and to a motor 13.

Le plateau 11 peut tourner en rotation autour d'un axe perpendicu­laire à l'axe de la tête 9 par rapport à un chariot 14. Cet axe est vertical dans le dispositif représenté aux figures 3 à 5. On bloque le plateau 11 par rapport au chariot 14 par deux vis 15 et par deux goupilles 15′.The plate 11 can rotate in rotation about an axis perpendicular to the axis of the head 9 relative to a carriage 14. This axis is vertical in the device shown in Figures 3 to 5. The plate 11 is blocked relative to the carriage 14 by two screws 15 and by two pins 15 ′.

Le chariot 14 est muni de galets 16 qui se déplacent sur les tranches de deux segments circulaires 17 verticaux solidaires de deux montants verticaux d'un support 18. Il comporte également des galets 19 qui se déplacent sur la surface des montants verti­caux 34.The carriage 14 is provided with rollers 16 which move on the edges of two vertical circular segments 17 integral with two vertical uprights of a support 18. It also includes rollers 19 which move on the surface of the vertical uprights 34.

Pour déplacer le chariot 14 on utilise une vis sans fin 20 fixée à une extrémité au chariot 14 et à l'autre à un moteur 21 monté par une rotule sur le support 18.To move the carriage 14, an endless screw 20 is used fixed at one end to the carriage 14 and at the other to a motor 21 mounted by a ball joint on the support 18.

Les segments 17 sont disposés dans des plans verticaux perpendicu­laires à l'axe du rotor xx' de façon que le chariot 14 décrive un mouvement circulaire parallèle à la périphérie de la roue du rotor sur laquelle on vient fixer les bandages 6. Le support 18 est monté sur une base 22 horizontale par rapport à laquelle il peut se déplacer horizontalement dans deux directions, l'une parallèle à l'axe du rotor et l'autre perpendiculaire à cet l'axe.The segments 17 are arranged in vertical planes perpendicular to the axis of the rotor xx 'so that the carriage 14 describes a circular movement parallel to the periphery of the rotor wheel on which the tires 6 are fixed. The support 18 is mounted on a horizontal base 22 with respect to which it can move horizontally in two directions, one parallel to the axis of the rotor and the other perpendicular to this axis.

On a choisi des segments 17 convenant pour une roue donnée et on a positionné le support 18 de façon que les segments 17 aient leur axe confondu avec l'axe du rotor.We chose segments 17 suitable for a given wheel and we positioned the support 18 so that the segments 17 have their axis coincident with the axis of the rotor.

Le plateau 11 est orienté de façon que l'axe de la tête de rivetage 9 fasse avec le plan vertical P orthogonal à l'axe du rotor un angle c égal à l'angle fait par l'axe des tenons 4 avec le même plan.The plate 11 is oriented so that the axis of the riveting head 9 makes with the vertical plane P orthogonal to the axis of the rotor an angle c equal to the angle made by the axis of the tenons 4 with the same plane .

Sur la tête de rivetage 9 on a fixé deux flasques 23 terminés chacun par une partie plane inclinée 24.On the riveting head 9 two flanges 23 have been fixed, each terminating in a flat inclined part 24.

Les parties inclinées 24 sont parallèles au plan P et les flasques 23 sont parallèles à l'axe de la tête 9. Ces flasques 23 ont été choisis en tenant compte de l'angle c d'inclinaison des tenons 4.The inclined parts 24 are parallel to the plane P and the flanges 23 are parallel to the axis of the head 9. These flanges 23 were chosen taking into account the angle c of inclination of the let's stick 4.

Sur la partie inclinée 24 du flasque 23 encaissant les efforts maximaux lors du rivetage est monté un mors 25 déplaçable parallèlement à l'axe du rotor par un moteur 26. Sur la partie inclinée 24 de l'autre flasque est monté un second mors 27 déplaçable également parallèlement à l'axe du rotor par un vérin 28. Grâce au moteur 26 et au système de transmission le mors 25 est totalement immobilisé en déplacement axial pendant la durée du rivetage malgré tous les efforts qu'il encaisse.A jaw 25 movable parallel to the axis of the rotor by a motor 26 is mounted on the inclined part 24 of the flange 23 receiving the maximum forces during riveting. On the inclined part 24 of the other flange is mounted a second movable jaw 27 also parallel to the axis of the rotor by a jack 28. Thanks to the motor 26 and the transmission system, the jaw 25 is completely immobilized in axial displacement for the duration of the riveting despite all the efforts it takes.

Au sommet de la tête 9 sont montés un embout 29 et un vérin annulaire 30. Le vérin 30 déplace l'embout 29 parallèlement à l'axe de la tête 9.At the top of the head 9 are mounted an end piece 29 and an annular jack 30. The jack 30 moves the end piece 29 parallel to the axis of the head 9.

Cet embout 29 est muni d'une ouverture 31 laissant passer la bouterolle 10 ainsi que les tenons 4. Sur les deux bords de l'ouverture sont fixées deux plaquettes amovibles (non représentées) qui viennent appliquer le bandage contre le sommet de l'ailette de part et d'autre des tenons.This end piece 29 is provided with an opening 31 allowing the chuck 10 to pass as well as the studs 4. On the two edges of the opening are fixed two removable plates (not shown) which come to apply the bandage against the top of the fin on either side of the studs.

La tête de rivetage 9 est une tête connue, dans laquelle la bouterolle 10 décrit une rosace en appliquant une force donnée lors du rivetage et est animée d'un mouvement d'avance avant le rivetage et de recul après.The riveting head 9 is a known head, in which the bolt 10 describes a rosette by applying a given force during riveting and is animated by a movement of advance before riveting and of recoiling after.

Devant la bouterolle 10 est monté un endoscope 32 rétractable sous l'effet d'un vérin 33 monté sur la tête de rivetage 9 par une liaison 35. L'endoscope passe à travers l'ouverture 31.In front of the bolt 10 is mounted a retractable endoscope 32 under the effect of a jack 33 mounted on the riveting head 9 by a link 35. The endoscope passes through the opening 31.

Le procédé selon l'invention est le suivant. Le rotor est disposé avec son axe horizontal, on amène par rotation du rotor le paquet 2 d'ailettes monté sur une roue 7 de ce rotor dans une position sensiblement horizontale.The process according to the invention is as follows. The rotor is arranged with its horizontal axis, the pack 2 of fins mounted on a wheel 7 of this rotor is brought by rotation of the rotor in a substantially horizontal position.

Les tenons 4 des ailettes font un angle c avec le plan vertical P de symétrie de la roue dont fait partie le paquet 2 d'ailettes.The pins 4 of the fins form an angle c with the vertical plane P of symmetry of the wheel of which the pack 2 of fins is part.

On monte les deux segments circulaires 17 correspondant à la roue sur laquelle on veut monter les bandages 6. On déplace le support 18 du chariot 4 de façon que l'axe des segments 17 soit confondu avec l'axe du rotor.We mount the two circular segments 17 corresponding to the wheel on which we want to mount the tires 6. We move the support 18 of the carriage 4 so that the axis of the segments 17 is coincident with the axis of the rotor.

On monte sur la tête 9 deux flasques 23 qui forment chacun un dièdre d'angle obtu 180°-c. On règle en rotation, la position du plateau 11 de façon que l'axe de la tête 9 fasse un angle c avec le plan P et donc que les extrémités 24 des flasques 23 soient parallèles à ce plan P.We mount on the head 9 two flanges 23 which each form a obtuse angle dihedral 180 ° -c. The position of the plate 11 is adjusted in rotation so that the axis of the head 9 makes an angle c with the plane P and therefore that the ends 24 of the flanges 23 are parallel to this plane P.

L'endoscope 32 est réglé sur l'axe de la tête 9.The endoscope 32 is adjusted on the axis of the head 9.

Ensuite en déplaçant la tête grâce aux moteurs 13, 21 et grâce au mouvement du support 18 parallèlement à l'axe xx′ on règle l'endoscope sur la position d'un tenon 4 de l'ailette horizontale. L'axe de la tête 9 se trouve ainsi dans le prolongement de l'axe du tenon 4.Then by moving the head thanks to the motors 13, 21 and thanks to the movement of the support 18 parallel to the axis xx ′ the endoscope is adjusted to the position of a tenon 4 of the horizontal fin. The axis of the head 9 is thus in the extension of the axis of the tenon 4.

Une fois que la tête 9 est réglée pour un tenon 4 on vient brider les mouvements horizontaux et verticaux de la tête 9 par des dispositifs de bridage (non représentés). On applique le mors 25 contre un groupe d'ailettes (par exemple cinq ailettes) en manoeu­vrant le moteur 26.Once the head 9 is adjusted for a tenon 4, the horizontal and vertical movements of the head 9 are clamped by clamping devices (not shown). The jaw 25 is applied against a group of fins (for example five fins) by operating the motor 26.

On vient appliquer l'autre mors 27 par le vérin 28 contre le groupe d'ailettes bridant ainsi ce groupe d'ailettes.The other jaw 27 is applied by the jack 28 against the group of fins thus clamping this group of fins.

On applique l'embout 29 contre le bandage 6, l'endoscope 32 étant toujours en position.The end piece 29 is applied against the tire 6, the endoscope 32 still being in position.

On relève l'endoscope 32 et on procède au rivetage proprement dit. La bouterolle 10 vient au contact du tenon 4 et par un mouvement concentrique à la périphérie du tenon 4, aplatit celui-ci. La durée et la force appliquées peuvent être réglées avec précision pour tenir compte des tenons utilisés. La bouterolle 10 s'écarte alors automatiquement du tenon 4.The endoscope 32 is raised and the actual riveting is carried out. The snap 10 comes into contact with the post 4 and, by a concentric movement at the periphery of the post 4, flattens the latter. The duration and the force applied can be precisely adjusted to take account of the tenons used. The snap 10 then automatically moves away from the stud 4.

On débride le bandage 6 en reculant l'embout 29. On débride le groupe d'ailettes en écartant les mors 27 puis 25 ; puis on débride les mouvements verticaux et horizontaux de la tête de rivetage 9.The bandage 6 is unclamped by moving the end piece 29 backward. The group of fins is unclamped by spreading the jaws 27 then 25; then we unbridle the vertical and horizontal movements of the riveting head 9.

On remet en place l'endoscope 32 que l'on vient centrer sur un autre tenon 4 et ainsi de suite.The endoscope 32 is replaced, which is centered on another tenon 4 and so on.

Le déplacement de la tête de rivetage 9 est aisé lorsqu'on passe du tenon d'une ailette au tenon correspondant d'une autre ailette puisqu'ils sont situés dans le même plan vertical ; il suffit alors de déplacer le chariot 14 le long des segments circulaires 17 pour passer d'un tenon 4 à un autre.The displacement of the riveting head 9 is easy when passing from the lug of one fin to the corresponding lug of another fin since they are located in the same vertical plane; it then suffices to move the carriage 14 along the circular segments 17 to pass from one stud 4 to another.

Lorsqu'on passe d'un tenon 4 d'une ailette à un autre tenon de la même ailette, il faut déplacer le support 18 latéralement et reculer ou avancer la tête le long de son axe.When passing from a lug 4 of a fin to another lug of the same fin, it is necessary to move the support 18 laterally and to move back or advance the head along its axis.

Selon une variante de l'invention l'axe de la tête de rivetage 9 n'est plus choisi dans un plan horizontal passant par l'axe du rotor (où il peut se déplacer par rotation du plateau) mais dans un plan passant par l'axe du rotor et faisant un angle voisin de 45° à 90° avec le plan horizontal.According to a variant of the invention, the axis of the riveting head 9 is no longer chosen in a horizontal plane passing through the axis of the rotor (where it can move by rotation of the plate) but in a plane passing through the 'axis of the rotor and making an angle close to 45 ° to 90 ° with the horizontal plane.

Ainsi les efforts encaissés par le dispositif de rivetage entraînent moins de déformations.Thus the forces collected by the riveting device cause less deformation.

Claims (10)

1/ Procédé de rivetage d'un bandage (6) sur une ailette (1) d'une roue (7) de rotor d'axe horizontal (xx′), chaque ailette (1) comportant à son sommet (3) un ou plusieurs tenons (4) introductibles dans un ou plusieurs trous (5) du bandage (6), lesdits tenons (4) faisant un angle aigu c avec le plan médian P de la roue (7) orthogonal à l'axe (x′x),
caractérisé en ce qu'on règle une tête de rivetage (9) pour une roue déterminée (7) de façon, d'une part, qu'elle puisse se déplacer selon un mouvement circulaire en passant au voisinage des sommets (3), d'ailettes (1) de la roue (7) et, d'autre part, que lorsqu'elle est au-dessus d'un tenon (4), son axe soit dans le prolongement de l'axe du tenon (4), puis on procède au groupe d'opérations de rivetage suivantes :
- on centre un premier tenon (4) devant la tête de rivetage (9),
- on bride les mouvements verticaux et horizontaux de la tête (9),
- on bride ensemble un groupe d'ailettes comprenant l'ailette (1) à bander avec la tête de rivetage (9),
- on bride le bandage (6) contre le sommet (3) de l'ailette (1),
- on rivette le tenon (4),
- on débride le bandage (6) et le groupe d'ailettes (1),
- on débride les mouvements verticaux et horizontaux de la tête (9),
- ensuite on déplace la tête (9) de façon à amener un second tenon (4) devant la tête de rivetage (9),
- on recommence alors au groupe d'opérations de rivetage jusqu'à ce que tous les tenons (4) d'un bandage (6) aient été ainsi traités.1 / Method for riveting a bandage (6) on a fin (1) of a rotor wheel (7) with a horizontal axis (xx ′), each fin (1) comprising at its top (3) one or several studs (4) insertable into one or more holes (5) of the tire (6), said studs (4) making an acute angle c with the median plane P of the wheel (7) orthogonal to the axis (x′x ),
characterized in that a riveting head (9) is adjusted for a given wheel (7) so that, on the one hand, it can move in a circular motion passing in the vicinity of the vertices (3), d 'fins (1) of the wheel (7) and, on the other hand, that when it is above a lug (4), its axis is in the extension of the axis of the lug (4), then we proceed to the following group of riveting operations:
- a first tenon (4) is centered in front of the riveting head (9),
- the vertical and horizontal movements of the head (9) are clamped,
- a group of fins is clamped together comprising the fin (1) to be bandaged with the riveting head (9),
- the bandage (6) is clamped against the top (3) of the fin (1),
- the post is riveted (4),
- the bandage (6) and the group of fins (1) are unclamped,
- the vertical and horizontal movements of the head (9) are unleashed,
- then the head (9) is moved so as to bring a second stud (4) in front of the riveting head (9),
- Then the group of riveting operations is started again until all the tenons (4) of a bandage (6) have been thus treated. 2/ Procédé selon la revendication 1, caractérisé en ce qu'on se sert d'un endoscope porté par la tête (9) pour centrer celle-ci sur un tenon (4).2 / A method according to claim 1, characterized in that one uses an endoscope carried by the head (9) to center the latter on a stud (4). 3/ Dispositif de rivetage d'un bandage (6) sur des ailettes (1) d'une roue (7) d'un rotor afin de les lier entre elles, chaque ailette (1) comportant à son sommet (3) un ou plusieurs tenons (4) introductibles dans un ou plusieurs trous (5) du bandage (6), lesdits tenons (4) faisant un angle aigu c avec le plan médian P de la roue (7) orthogonal à l'axe (x′x) du rotor,
caractérisé en ce qu'il comporte un chariot (14) supportant une tête de rivetage (9) avec une bouterolle (10) venant en contact avec le tenon (4) et animée d'un mouvement autour de l'axe de la tête (9) assurant par écrasement du tenon (4) le rivetage du ban­dage (6), l'axe de la tête (9) étant confondu avec l'axe du tenon (4), la tête de rivetage (9) étant solidaire de deux flasques (23) paral­lèles à l'axe de cette tête (9) chaque flasque (23) étant terminé par une partie parallèle (24) au plan P, chacune de ces parties (24) supportant un mors (25, 27) ainsi que des moyens (26, 28) de déplacer ce mors (25, 27) de façon à venir bloquer un paquet d'ailettes comprenant l'ailette (1) sur laquelle le bandage (6) doit être riveté.3 / Device for riveting a bandage (6) on fins (1) of a wheel (7) of a rotor in order to link them together, each fin (1) comprising at its top (3) one or several studs (4) insertable into one or more holes (5) of the tire (6), said studs (4) making an acute angle c with the median plane P of the wheel (7) orthogonal to the axis (x′x ) of the rotor,
characterized in that it comprises a carriage (14) supporting a riveting head (9) with a chuck (10) coming into contact with the post (4) and animated by a movement around the axis of the head ( 9) ensuring by crushing the tenon (4) the riveting of the bandage (6), the axis of the head (9) being coincident with the axis of the tenon (4), the riveting head (9) being integral with two flanges (23) parallel to the axis of this head (9) each flange (23) being terminated by a part parallel (24) to the plane P, each of these parts (24) supporting a jaw (25, 27) as well as means (26, 28) for moving this jaw (25, 27) so as to block a pack of fins comprising the fin (1) on which the bandage (6) is to be riveted. 4/ Dispositif selon la revendication 1, caractérisé en ce qu'un mors (25) est déplacé par un moteur (26) et le second (27) par un vérin (28).4 / Device according to claim 1, characterized in that a jaw (25) is moved by a motor (26) and the second (27) by a jack (28). 5/ Dispositif de rivetage selon l'une des revendications précédentes, caractérisé en ce que le chariot (14) est muni de moyens (12, 13) permettant à la tête de rivetage (9) avec ses flasques (23) de se déplacer d'avant en arrière le long de l'axe.5 / Riveting device according to one of the preceding claims, characterized in that the carriage (14) is provided with means (12, 13) allowing the riveting head (9) with its flanges (23) to move d 'back and forth along the axis. 6/ Dispositif de rivetage selon l'une des revendications précédentes caractérisé en ce que la tête de rivetage (9) est montée sur le chariot (14) par l'intermédiaire d'un plateau tournant (11) permettant de règler l'angle d'inclinaison de la tête (9) avec un plan vertical P perpendiculaire à l'axe du rotor (xx′) à une valeur c égale à l'incli­naison des tenons 4 par rapport à ce plan P.6 / Riveting device according to one of the preceding claims characterized in that the riveting head (9) is mounted on the carriage (14) by means of a turntable (11) for adjusting the angle d inclination of the head (9) with a vertical plane P perpendicular to the axis of the rotor (xx ′) at a value c equal to the inclination of the pins 4 relative to this plane P. 7/ Dispositif de rivetage selon l'une des revendications précédentes caractérisé en ce que la tête (9) est munie d'un embout (29) et d'un vérin (30) qui vient appliquer l'embout (29) contre le bandage (6) pour le maintenir pendant le rivetage.7 / Riveting device according to one of the preceding claims characterized in that the head (9) is provided with a tip (29) and a jack (30) which comes to apply the tip (29) against the tire (6) to maintain it during riveting. 8/ Dispositif de rivetage selon l'une des revendications précédentes caractérisé en ce qu'il comporte un support (18) muni de deux guides circulaires (17) le long desquels le chariot (4) peut se déplacer en rotation, lesdits guides dont l'axe est confondu avec l'axe (xx′) du rotor qui est horizontal étant amovibles pour pouvoir adapter le dispositif aux ailettes (1) de chaque roue (7).8 / Riveting device according to one of the preceding claims characterized in that it comprises a support (18) provided with two circular guides (17) along which the carriage (4) can move in rotation, said guides including l 'axis is coincident with the axis (xx ′) of the rotor which is horizontal being removable to be able to adapt the device to the fins (1) of each wheel (7). 9/ Dispositif de rivetage selon l'une des revendications précédentes caractérisé en ce que le support (18) est mobile dans deux directions perpendiculaires par rapport au sol.9 / Riveting device according to one of the preceding claims characterized in that the support (18) is movable in two directions perpendicular to the ground. 10/ Dispositif de rivetage selon l'une des revendications précédentes caractérisé en ce que l'axe de la tête de rivetage (9) est dans un plan passant par l'axe du rotor (xx') faisant un angle de 45° à 90° avec le plan horizontal.10 / Riveting device according to one of the preceding claims characterized in that the axis of the riveting head (9) is in a plane passing through the axis of the rotor (xx ') making an angle of 45 ° to 90 ° with the horizontal plane.
EP90107230A 1989-04-21 1990-04-17 Method and apparatus for riveting a shroud ring to the blade tips of a bladed rotor Expired - Lifetime EP0393567B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905354A FR2646114B1 (en) 1989-04-21 1989-04-21 METHOD AND DEVICE FOR RIVETING A BANDAGE WITH FINS MOUNTS ON A ROTOR
FR8905354 1989-04-21

Publications (2)

Publication Number Publication Date
EP0393567A1 true EP0393567A1 (en) 1990-10-24
EP0393567B1 EP0393567B1 (en) 1995-06-21

Family

ID=9381013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107230A Expired - Lifetime EP0393567B1 (en) 1989-04-21 1990-04-17 Method and apparatus for riveting a shroud ring to the blade tips of a bladed rotor

Country Status (13)

Country Link
US (1) US5060375A (en)
EP (1) EP0393567B1 (en)
JP (1) JPH02295629A (en)
CN (1) CN1022738C (en)
AT (1) ATE123981T1 (en)
CS (1) CS197890A2 (en)
DE (1) DE69020225T2 (en)
DK (1) DK0393567T3 (en)
ES (1) ES2073472T3 (en)
FR (1) FR2646114B1 (en)
GR (1) GR3017202T3 (en)
RU (1) RU2004394C1 (en)
ZA (1) ZA903009B (en)

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WO2012131449A1 (en) * 2011-03-31 2012-10-04 Vlastimil Sedlacek Device and method for securing cover bands to stator blades

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US5778505A (en) * 1994-10-04 1998-07-14 Gemcor Engineering Corporation Apparatus for fastening a semi-cylindrical workpiece
US6526657B2 (en) 2001-05-07 2003-03-04 General Electric Company Methods for automated peening of tenons connecting turbine buckets and cover plates
JP4028442B2 (en) * 2002-06-26 2007-12-26 株式会社東芝 Apparatus and method for correcting deformation of gas turbine blade
ES2285594T3 (en) * 2005-03-17 2007-11-16 Siemens Aktiengesellschaft CURVATOR AND CURVING PROCEDURE OF A SAFETY SHEET IN A COMPRESSOR OR A TURBINE.
US7389662B2 (en) * 2005-09-30 2008-06-24 General Electric Company Method and apparatus for self indexing portable automated tenon peening
US7966856B1 (en) * 2009-12-15 2011-06-28 General Electric Company Robotic peening apparatus
PL397937A1 (en) 2012-01-30 2013-08-05 General Electric Company Induction annealing system for turbine
KR101596882B1 (en) * 2014-03-18 2016-02-23 군산대학교산학협력단 Automatic Rivetting Apparatus for Assembling Generating Turbine Blade
CN104148572B (en) * 2014-08-19 2016-05-11 齐齐哈尔轨道交通装备有限责任公司 A kind of rivet driver
CN110328493B (en) * 2019-06-28 2020-07-24 中国航发南方工业有限公司 Method for controlling the axial clearance between the tip of a centrifugal impeller and a shroud

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US2197334A (en) * 1938-09-14 1940-04-16 Westinghouse Electric & Mfg Co Turbine apparatus
FR2367553A1 (en) * 1976-10-14 1978-05-12 Bbc Brown Boveri & Cie JUNCTION DEVICE FOR A COVER TAPE AND THE STEERING FINS OF A TURBO-MACHIN
US4437213A (en) * 1982-08-19 1984-03-20 Transamerica Delaval Inc. Means for tenon-forming a shroud to a turbine rotor
DE3535761C1 (en) * 1985-10-07 1987-03-26 Messerschmitt Boelkow Blohm Riveting machine

Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2012131449A1 (en) * 2011-03-31 2012-10-04 Vlastimil Sedlacek Device and method for securing cover bands to stator blades
CN102933796A (en) * 2011-03-31 2013-02-13 弗拉斯季米尔·塞德拉切克 Device and method for securing cover bands to stator blades
CZ305366B6 (en) * 2011-03-31 2015-08-19 Vlastimil Sedláček Assembly method of turbine stator vanes, their locking by means of shroud and apparatus for making the same
CN102933796B (en) * 2011-03-31 2015-11-25 弗拉斯季米尔·塞德拉切克 The method of stator vane fixed cover is installed and uses the device of the method

Also Published As

Publication number Publication date
CS197890A2 (en) 1991-09-15
FR2646114B1 (en) 1994-04-08
EP0393567B1 (en) 1995-06-21
ES2073472T3 (en) 1995-08-16
DE69020225D1 (en) 1995-07-27
DK0393567T3 (en) 1995-10-02
ATE123981T1 (en) 1995-07-15
GR3017202T3 (en) 1995-11-30
JPH02295629A (en) 1990-12-06
ZA903009B (en) 1991-01-30
CN1022738C (en) 1993-11-17
DE69020225T2 (en) 1995-11-02
FR2646114A1 (en) 1990-10-26
RU2004394C1 (en) 1993-12-15
US5060375A (en) 1991-10-29
CN1046481A (en) 1990-10-31

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