EP1207013B1 - Verfahren zur Verlängerung der Lebensdauer der Laufschaufelnbefestigung auf einem Rotor - Google Patents

Verfahren zur Verlängerung der Lebensdauer der Laufschaufelnbefestigung auf einem Rotor Download PDF

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Publication number
EP1207013B1
EP1207013B1 EP01402916A EP01402916A EP1207013B1 EP 1207013 B1 EP1207013 B1 EP 1207013B1 EP 01402916 A EP01402916 A EP 01402916A EP 01402916 A EP01402916 A EP 01402916A EP 1207013 B1 EP1207013 B1 EP 1207013B1
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EP
European Patent Office
Prior art keywords
sonotrode
rim
beads
groove
blade
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.)
Expired - Lifetime
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EP01402916A
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English (en)
French (fr)
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EP1207013A1 (de
Inventor
Benoît Jean Henri Berthelet
Francis Lucien Guy Chareyre
Willy Lionel Fradin
Hakim Hoffmann
Stéphane Michel Kerneis
Marie-Christine Marcelle Ntsama-Etoundi
Guillaume François Roger Simon
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Safran Aircraft Engines SAS
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SNECMA SAS
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Publication of EP1207013A1 publication Critical patent/EP1207013A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/005—Vibratory devices, e.g. for generating abrasive blasts by ultrasonic vibrations
    • 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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
    • 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
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • 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
    • B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
    • B24B39/02—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working internal surfaces of revolution
    • B24B39/026—Impact burnishing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • 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
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2200/00—Mathematical features
    • F05D2200/20—Special functions
    • F05D2200/24—Special functions exponential
    • 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
    • Y10T29/47—Burnishing
    • Y10T29/479—Burnishing by shot peening or blasting
    • 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
    • Y10T29/49318—Repairing or disassembling
    • 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
    • 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

Definitions

  • the invention relates to blade fasteners on a rotor and more particularly to a method for increasing its service life, this method implementing a particular form of the so-called "ultrasonic" shot blasting technique.
  • paddle rotors are traditionally made of a rim on the periphery of which are mounted a plurality of removable vanes.
  • the mounting device is called in this patent application "blade attachment".
  • This device comprises a dovetail groove machined in the rim and a foot also dovetail machined at the base of the blade, the assembly being effected by the interlocking of the foot in the groove.
  • the dovetail has several "bulbs" of decreasing size, typically three bulbs, each bulb providing separately the function of the dovetail.
  • these two forms of fasteners will be said indifferently "dovetail”.
  • the blade roots are nested in the grooves by sliding with limited play, the feet then being immobilized without play by various locking means. It is understood that the grooves and the blade roots are the seat of high concentrations of stress and that their realization is therefore particularly neat.
  • Turbojet rotors are usually made of steel, titanium alloy or superalloy based on nickel or chromium.
  • the rotors are blasted by blasting small balls of hard material with one or more compressed air nozzles.
  • This shot peening has the effect of creating a compressive prestressing on the surface of the rotor to a depth of a few tenths of a millimeter, this prestressing delaying the appearance of cracks resulting from heavy stresses and thus increasing the life of the rotor.
  • shot peening is preceded by a heat treatment of the part to be treated to release residual stresses remaining in this room.
  • certain parts of the part must not be blasted, they are usually protected by coating them with a material, such as an elastomer, of hardness sufficient to withstand the impacts of the balls.
  • a strong shot of Almen intensity of the order of F15A to F17A and to create on the surface of the rotor a compressive prestress of the order of 900 to 1100 MPa (mega pascals) is desirable, these rotors being usually steel , of titanium alloy or superalloys based on chromium or nickel.
  • shot blasting greatly increases the roughness of the treated surfaces and thus reduces the wear resistance by vibratory friction of the surfaces of the grooves and blade roots in contact with each other.
  • the US Patent 4888863 describes a method of manufacturing blade roots by electro-erosion machining followed by a shot peening treatment of Almen intensity between 4A and 6A.
  • the problem to be solved is to simultaneously increase the fatigue strength and vibration resistance of the rotors at the blade attachments, this increase should not cause a significant increase in the time and cost of manufacture of the rotors.
  • Ball blast blasting is currently undergoing a new form of implementation known as "ultrasound" in which the balls are no longer thrown by a jet nozzle but by the percussion on these balls from the surface of a sonotrode vibrating at frequencies of the order of 20 to 60 KHertz, the balls being held inside an enclosure, the piece to be blasted being according to its dimensions immersed inside the enclosure or presented in front of an opening of this enclosure.
  • FR 2689431 a method of ultrasonic blasting surface treatment according to which is formed an enclosure defined by a vibrating surface and movable walls perpendicular to the vibrating surface which abut against the surface of the wall to be treated.
  • the invention provides a method for increasing the life of blade fasteners on a rotor according to claim 1.
  • Such a method is remarkable in that the shot blasting is carried out by the so-called “ultrasonic” method, the balls being projected by the percussion of a sonotrode placed in vibration, the balls being contained in a chamber and forming a fog with enclosure interior, the component to be shot blasted into contact with the fog of balls, and in that the blasting is carried out at an Almen number at least equal to F8A, for a duration T of 120% to 300% of the duration T1 necessary to obtain a normal recovery rate of 98%.
  • the inventors have observed that a strong ultrasonic shot blasting increases only slightly the roughness of the treated part, in contrast to conventional shot blasting using a jet nozzle of compressed air.
  • the invention thus takes advantage of this unexpected property to increase the fatigue strength of the blade fasteners while maintaining good resistance to wear by vibrational friction.
  • An advantage of the invention is also to increase the vibration friction wear resistance of the blade fasteners, since the high compressive biasing of the component surfaces of the blade fasteners causes them to harden by work hardening.
  • beads having a diameter of at least 0.8 mm will be used in order to improve the blasting efficiency and to stabilize or reduce the roughness of the treated parts.
  • the compression prestressing will be at least equal to 500 MPa.
  • the invention proposes the application to so-called "axial" grooves on the rims of paddle rotors.
  • the invention proposes the application to so-called "annular" grooves on the rims of the blade rotors.
  • the invention proposes the application to the blade roots.
  • the figure 1 illustrates the deformation of the material under the impact of the moving balls.
  • the figure 2 illustrates the rim of a rotor and reveals the so-called "axial" grooves at its periphery.
  • the figure 3 illustrates the mounting of a blade on a rim with axial grooves.
  • FIGS. 4 and 5 illustrate by a front view and a profile view the ultrasonic shot blasting process of the axial grooves, the figure 4 being a sectional view along B on the figure 5 , this figure 5 being itself a sectional view along A on the figure 4 .
  • the figure 6 illustrates the rim of a so-called "annular" groove rotor.
  • the figure 7 illustrates the mounting of a blade on a rim with annular grooves.
  • FIGs 8 and 9 illustrate by a front view and a profile view the ultrasonic shot blasting process of the annular grooves.
  • the figure 8 is a section along D on the figure 9 , this figure 9 being itself a sectional view along C on the figure 8 ..
  • FIGS. 10 and 11 illustrate by a front view and a view from above the method of ultrasonic blasting of the blade roots, the figure 10 being a sectional view along E on the figure 11 .
  • an angle of incidence ⁇ close to the perpendicular means an angle ⁇ at least equal to 45 °, the effectiveness of the impact being all the better that this angle ⁇ is close to 90 °.
  • an angle of incidence ⁇ grazing means an angle ⁇ less than 45 ° and preferably between 15 ° and 30 °.
  • the strong blast blasting according to the invention also involves a so-called "overlap" rate ranging from 120% to 300%, that is to say that blasting is carried out for a duration T equal to 120% to 300% of the T1 time required to obtain a normal recovery rate of 98%, the normal recovery rate being the ratio between the impacted surface and the total surface exposed to shot blasting.
  • the blade rotor comprises a rim 10 having a general shape of revolution around a geometric axis 11, this rim 10 being limited radially outwards by a peripheral surface 12 and laterally by two sidewalls 13.
  • the rim 10 comprises at its periphery 12 a plurality of grooves 14 substantially rectilinear said “axial” each having a mouth 15 extended laterally by two side openings 16, the mouth 15 opening on the periphery 12, the side openings 16 opening on the sidewalls 13.
  • the grooves 14 have a substantially trapezoidal profile called "dovetail” with a mouth 15 narrower.
  • These grooves 14 may be parallel to the geometric axis 11 or oblique. They can be rectilinear or in an arc.
  • a blade 20 comprises successively from top to bottom in this figure a thin blade 21, a platform 22 extending laterally on each side of the blade 20 and a foot 23 of substantially trapezoidal shape and complementary to that of the groove 14
  • the blade 20 is engaged by its foot 23 in the groove 14 with limited play, the foot 23 then being immobilized in the groove 14 by various locking means not shown.
  • the foot 23 comes into contact with the groove 14 along two lines of contact 24 located at the rear of the mouth 15 and recessed from this mouth 15.
  • the attachment 26 of the blade 20 comprises the groove 14 and the foot 23.
  • the rotor blade comprises in this second example a rim 10 having a general shape of revolution around a geometric axis 11, the rim 10 being limited radially outwardly by an annular peripheral surface 12.
  • the rim 10 comprises in this example at the periphery 12 three annular grooves 14 whose descriptions are identical: Each annular groove 14 has a mouth 15 also annular and opening on the periphery 12. Each groove also has a local opening 18 also opening on the periphery 12, this so-called "local” opening 18.
  • Each annular groove 14 has a substantially trapezoidal profile called "dovetail" with a mouth 15 narrower.
  • a blade 20 comprises successively from top to bottom in this figure a thin blade 21, a platform 22 extending laterally on each side of the blade 20 and a foot 23 of substantially trapezoidal shape and complementary to that of the groove 14 , the foot 23 being in this example disposed transversely to the blade 21.
  • This figure also shows for information the section 21a of the blade 21.
  • the blade 20 is engaged by its foot 23 in the annular groove 14 with a limited clearance and blocked by locking means not shown.
  • Each annular groove 14 thus receives a plurality of blades 20 whose foot 23 is introduced through the local opening, referenced 18 on the figure 6 , and brought into position by sliding in the annular groove 14.
  • the foot 23 comes into contact with the annular groove 14 along two annular contact lines 24 also located at the rear of the mouth 15.
  • fasteners 26 of the blades 20 is also meant the annular groove 14 and the feet 23.
  • the sonotrode 30 comprises a vibrating surface 31 capable of being introduced into the mouth 15 of the groove 14.
  • the sonotrode 30 slides in a sheath 32 with a clearance E less than the diameter of the balls 1.
  • the sealing of the beads of the sonotrode 30 relative to the mouth 15 may be provided by the sheath or by any other means. In a preferred embodiment, however, this seal is more simply provided by giving the sonotrode 30 a rectangular section with a width equal to that of the mouth 15 entrenched with a clearance E less than the diameter of the balls 1.
  • the sleeve 32 supports two ears 33 on either side of the sonotrode 30, these ears being able to slide in the annular groove 14 with a clearance E less than the diameter of the balls 1. It is understood that the sonotrode 30 and the ears 33 cooperate to contain the balls 1 inside a portion of the annular groove 14 and against the walls of this groove 14.
  • An advantage of the method is to avoid coating by a protective coating parts of the blade which are not to be blasted, namely the platform 22 and the blade 21, this protection being provided by the cover, the platform 22 and the blade 21 remaining behind the cover 45 outside the enclosure 40.
  • the feet 23 are positioned above the vibrating surface 31 of the sonotrode 30 to ensure uniform shot blasting of all the feet 23.
  • the blades 20 having a cooling cavity opening at the base 23a of the foot 23, this base 23a is positioned at a distance from the sonotrode 30 less than the diameter of the balls 1 in order to prevent the balls 1 from entering the cavity cooling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Laser Beam Processing (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (8)

  1. Verfahren zur Verlängerung der Lebensdauer der Befestigungen von Schaufeln auf einem Rotor, wobei der Rotor einen Felgenkranz (10) auf dem Umfang (12) aufweist, an dem eine Vielzahl abnehmbarer Schaufeln (20) befestigt sind, wobei die Schaufelbefestigungen mit (26) gekennzeichnet sind und zwei Komponenten (14, 23) aufweisen, wobei eine der Komponenten (14) eine schwalbenschwanzförmige Rille ist, die auf dem Umfang (12) auf dem Felgenkranz (10) angeordnet ist, wobei die andere Komponente (23) ein auf der Schaufel (20) angeordnete Fuß ist, wobei der Fuß (23) komplementär zur Rille (14) geformt ist, wobei der Fuß (23) imstande ist, in die Rille (14) einzurasten, um die Befestigung der Schaufel (26) auf dem Felgenkranz (10) durchzuführen, wobei mindestens eine Komponente (14, 23) durch Strahlen von Kugeln (1) granuliert ist, um auf ihrer Oberfläche eine Kompressions-Vorspannung zu erzeugen,
    dadurch gekennzeichnet, dass
    a) das Granulieren durch das als "Ultraschall" bezeichnete Verfahren durchgeführt wird, wobei die Kugeln (1) durch das Schlagen einer in Vibration versetzten Sonotrode (30) gestrahlt werden, wobei die Kugeln (1) in einer Box (40) enthalten sind und innerhalb der Box (40) eine Nebel bilden, wobei die zu granulierende Komponente (14, 23) in Kontakt mit dem Kugelnebel (1) geführt wird,
    b) das Granulieren mit einem Almen-Index von zumindest gleich F8A während einer Dauer T von 120 % bis 300 % der Dauer T1 durchgeführt wird, die notwendig ist, um einen normalen Abdeckungsgrad von 98 % zu erhalten.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Kugeln (1) einen Durchmesser von zumindest gleich 0,8 mm haben.
  3. Verfahren nach Anspruch 1 oder 2, wobei das Teil aus Werkstoff der Gruppe Stahl, Titanlegierung, chrombasierte Superlegierung, nickelbasierte Superlegierung ist, dadurch gekennzeichnet, dass die durchgeführte Vorspannung mindestens 500 MPa beträgt.
  4. Verfahren nach einem der Ansprüche 1 bis 3, das auf das Granulieren der axialen Rillen (14) angewendet wird, wobei diese axialen Rillen (14) etwa geradlinig und an jedem Ende offen sind, wobei die derart gebildeten seitlichen Öffnungen mit (16) gekennzeichnet sind,
    dadurch gekennzeichnet, dass eine Sonotrode verwendet wird, die in die Mündung (15) der Rillen (14) einführbar ist mit Mitteln, um die Sonotrode (30) mit der Mündung (15) abzudichten, sowie zwei Ohren (33), die imstande sind, die seitlichen Öffnungen (16) abzudecken und sie mit einem Spiel E, das kleiner als der Durchmesser der Kugeln (1) ist, zu verdecken,
    und dass es die folgenden Arbeitsgänge aufweist:
    - Anordnen des Felgenkranzes (10) über der Sonotrode (30) in einer geeigneten Position, um jede axiale Rille (14) durch Drehen des Felgenkranzes (10) gemäß seiner geometrischen Achse (11) über die Sonotrode (30) zu führen,
    - Anordnen einer Dosis Kugeln (1) auf der Sonotrode (30),
    - Drehen des Felgenkranzes (10), um schrittweise jede axiale Rille (14) über die Sonotrode (30) zu führen, wobei jede axiale Rille (14) dann Gegenstand der folgenden Arbeitsgänge ist:
    - Abdecken der seitlichen Öffnungen (16) mit den Ohren (33) und Führen der Sonotrode (30) in die Mündung (15) der axialen Rille (14),
    - Durchführen des Granulierens der axialen Rille (14) durch Versetzen der Sonotrode (30) in Vibration,
    - Entfernen der Sonotrode (30).
  5. Verfahren nach einem der Ansprüche 1 bis 3, das auf das Granulieren einer ringförmigen Rille (14) angewendet wird, wobei diese ringförmige Rille (14) eine lokale Öffnung (18) aufweist, die es gestattet, die Füße (23) der Schaufeln (20) hindurchzuführen,
    dadurch gekennzeichnet, dass eine Sonotrode (30) verwendet wird, die in die Mündung (15) der ringförmigen Rillen (14) einführbar ist mit Mitteln, um die Sonotrode (30) mit der Mündung (15) abzudichten, sowie zwei Ohren (33), die imstande sind, in die ringförmige Rille (14) mit einem Spiel E, das kleiner als der Durchmesser der Kugeln (1) ist, hineinzureichen,
    und dass es die folgenden Arbeitsgänge aufweist:
    - Anordnen des Felgenkranzes (10) über der Sonotrode (30) in einer geeigneten Position, um die ringförmige Rille (14) über der Sonotrode (30) durch Drehen des Felgenkranzes (10) gemäß seiner geometrischen Achse (11) vorbeizuführen,
    - Anordnen einer Dosis Kugeln (1) auf der Sonotrode (30),
    - Darbieten der lokalen Öffnung (18) über der Sonotrode (30),
    - Führen der Sonotrode (30) und der zwei Ohren (33) in die lokale Öffnung (18), wobei die Sonotrode (30) auf Ebene der Mündung (15) ist und in der Flucht dieser Mündung (15), wobei die zwei Ohren (33) auf der einen und der anderen Seite der Sonotrode (30) und in der Flucht der ringförmigen Rille (14) sind,
    - Drehen des Felgenkranzes (10) und Versetzen der Sonotrode (30) in Vibration, wenn die zwei Ohren (33) und die Sonotrode (30) in der ringförmigen Rille (14) sind,
    - Stoppen der Sonotrode (30), sobald ein Ohr (33) in der lokalen Öffnung (18) austritt,
    - Stoppen der Drehbewegung, wenn die zwei Ohren (33) und die Sonotrode (30) in der lokalen Öffnung (18) sind.
  6. Verfahren nach einem der Ansprüche 1 bis 3, das auf das Granulieren der Schaufelfüße angewendet wird,
    dadurch gekennzeichnet, dass eine Box (40) verwendet wird, deren Boden (41) eine Öffnung (42) aufweist, durch die eine Sonotrode (30) mit einem Spiel E, das kleiner als der Durchmesser der Kugeln (1) ist, hindurchgeführt wird, wobei die Box (40) von einem dünnen Deckel (45) abgedeckt wird, wobei der Deckel (45) eine Vielzahl von komplementär zu den Füßen (23) geformte Öffnungen (46) aufweist, wobei der Abstand zwischen dem Deckel (45) und der Sonotrode (30) zumindest gleich der Höhe der Füße (23) ist,
    und dass das Verfahren die folgenden Arbeitsgänge aufweist:
    - Einführen einer Dosis Kugeln (1) in die Box (40),
    - Einführen der Füße (23) in die Öffnungen (46) des Deckels (45) und Blockieren der Schaufeln (1),
    - Versetzen der Sonotrode (30) in Vibration, um das Granulieren durchzuführen.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass alle Schaufeln (20) über der vibrierenden Oberfläche (31) der Sonotrode (30) positioniert sind.
  8. Verfahren nach Anspruch 7, wobei die Schaufeln (20) eine an der Basis (23a) des Fußes (23) mündende Kühlmulde aufweisen, dadurch gekennzeichnet, dass die Basis (23a) in einem Abstand von der Sonotrode (30) positioniert ist, der kleiner als der Durchmesser der Kugeln (1) ist.
EP01402916A 2000-11-16 2001-11-14 Verfahren zur Verlängerung der Lebensdauer der Laufschaufelnbefestigung auf einem Rotor Expired - Lifetime EP1207013B1 (de)

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FR0014767 2000-11-16
FR0014767A FR2816538B1 (fr) 2000-11-16 2000-11-16 Procede pour augmenter la duree de vie des attaches d'aubes sur un rotor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016100663A1 (de) * 2016-01-15 2017-07-20 Rolls-Royce Deutschland Ltd & Co Kg Vorrichtung und Verfahren zum Strahlverfestigen von Oberflächenbereichen, insbesondere von Tannenbaumprofilen

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7028378B2 (en) * 2000-10-12 2006-04-18 Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces Method of shot blasting and a machine for implementing such a method
JP3951905B2 (ja) * 2002-04-25 2007-08-01 日産自動車株式会社 回転子コア用の電磁鋼板形成体、これを用いた永久磁石内蔵型回転電機用回転子、永久磁石内蔵型回転電機、および回転子コア用の電磁鋼板形成体の製造方法
JP4189201B2 (ja) * 2002-10-30 2008-12-03 新日本製鐵株式会社 鋼材の溶接継手における熱影響部の靭性向上方法
US7399371B2 (en) * 2004-04-16 2008-07-15 Nippon Steel Corporation Treatment method for improving fatigue life and long-life metal material treated by using same treatment
DE102004029546A1 (de) * 2004-06-19 2006-01-05 Mtu Aero Engines Gmbh Verfahren und Vorrichtung zum Oberflächenstrahlen von Gasturbinenschaufeln im Bereich ihrer Schaufelfüße
US20060021410A1 (en) * 2004-07-30 2006-02-02 Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces Shot, devices, and installations for ultrasonic peening, and parts treated thereby
FR2873609B1 (fr) * 2004-07-30 2008-02-22 Sonats Soc Des Nouvelles Appli Projectiles, dispositifs et installations de grenaillage par ultrasons et pieces ainsi traitees
DE102004037954A1 (de) * 2004-08-05 2006-03-16 Mtu Aero Engines Gmbh Vorrichtung zum Oberflächenstrahlen von Bauteilen
DE102004059592B4 (de) * 2004-12-10 2014-09-04 MTU Aero Engines AG Verfahren zum Oberflächenstrahlen von Hohlräumen, insbesondere von Hohlräumen an Gasturbinen
US7147634B2 (en) 2005-05-12 2006-12-12 Orion Industries, Ltd. Electrosurgical electrode and method of manufacturing same
US8814861B2 (en) 2005-05-12 2014-08-26 Innovatech, Llc Electrosurgical electrode and method of manufacturing same
CN101175606B (zh) * 2005-05-12 2012-04-18 通用电气公司 超声波喷丸处理系统及方法
FR2889669B1 (fr) * 2005-08-12 2007-11-02 Snecma Piece metallique traitee par mise en compression de sous couches. procede pour obtenir une telle piece.
DE102005054866A1 (de) * 2005-11-17 2007-05-31 Mtu Aero Engines Gmbh Verfahren zum Herstellen von metallischen Bauteilen, insbesondere für Turbomaschinen, mit kleinen Kantenradien
US7516547B2 (en) * 2005-12-21 2009-04-14 General Electric Company Dovetail surface enhancement for durability
DE102006016949A1 (de) * 2006-04-11 2007-10-25 Mtu Aero Engines Gmbh Verfahren zum Herstellen eines Bauteils
ATE447462T1 (de) 2006-05-26 2009-11-15 Siemens Ag Strahlvorrichtung
DE102007009470A1 (de) * 2007-02-27 2008-08-28 Daimler Ag Verfahren und Vorrichtung zum Oberflächenstrahlen
FR2930184B1 (fr) * 2008-04-18 2010-12-31 Snecma Procede de grenaillage par ultrason de pieces de turbomachines.
JP5218228B2 (ja) * 2008-04-23 2013-06-26 新東工業株式会社 搬送装置及びブラスト加工装置
US8240042B2 (en) * 2008-05-12 2012-08-14 Wood Group Heavy Industrial Turbines Ag Methods of maintaining turbine discs to avert critical bucket attachment dovetail cracks
JP5567023B2 (ja) * 2008-10-23 2014-08-06 ダブリュ・ダブリュ・テクノロジー・アクチェンゲゼルシャフト 対象物を硬組織に固定するための増強装置
DE102009021582A1 (de) * 2009-05-15 2010-12-02 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Oberflächenverfestigung und -glättung von metallischen Bauteilen
DE102009040324B4 (de) * 2009-09-05 2016-11-17 MTU Aero Engines AG Verfahren zur Wärmebehandlung von Gasturbinenschaufeln
US8794925B2 (en) * 2010-08-24 2014-08-05 United Technologies Corporation Root region of a blade for a gas turbine engine
US20130183157A1 (en) * 2012-01-17 2013-07-18 Venkatarama K. Seetharaman Method of surface treatment for dovetail in gas turbine engine fan blade
US8959738B2 (en) * 2012-03-21 2015-02-24 General Electric Company Process of repairing a component, a repair tool for a component, and a component
US10633985B2 (en) * 2012-06-25 2020-04-28 General Electric Company System having blade segment with curved mounting geometry
US9200521B2 (en) * 2012-10-30 2015-12-01 General Electric Company Components with micro cooled coating layer and methods of manufacture
US20140255620A1 (en) * 2013-03-06 2014-09-11 Rolls-Royce Corporation Sonic grain refinement of laser deposits
US10018047B2 (en) * 2013-12-12 2018-07-10 United Technologies Corporation Methods of roughing and finishing engine hardware
US10493594B2 (en) * 2016-04-12 2019-12-03 General Electric Company Apparatus and method for peening of machine components
CN107283119B (zh) * 2017-05-19 2019-10-22 航天材料及工艺研究所 一种复合材料变截面燕尾盲槽加工方法
JP7015468B2 (ja) * 2018-01-12 2022-02-03 富士電機株式会社 蒸気タービン翼及びその製造方法
DE102018203777A1 (de) * 2018-03-13 2019-09-19 MTU Aero Engines AG Nachbehandlungsverfahren für Schaufeln einer Strömungsmaschine
CN111843634A (zh) * 2020-07-28 2020-10-30 大连理工大学 一种石英半球谐振子加工工装及方法
CN117400150A (zh) * 2020-12-10 2024-01-16 苏州圣美特压铸科技有限公司 工件研磨抛光设备
CN114134300B (zh) * 2021-12-13 2023-12-05 中船重工龙江广瀚燃气轮机有限公司 一种叶片进排气边喷丸保护装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482423A (en) * 1968-02-26 1969-12-09 Metal Improvement Co Blade peening masking apparatus
US3668913A (en) * 1970-10-05 1972-06-13 Metal Improvement Co Apparatus for shot-peening turbine blades
US4426867A (en) * 1981-09-10 1984-01-24 United Technologies Corporation Method of peening airfoils and thin edged workpieces
US4419875A (en) * 1981-09-10 1983-12-13 Progressive Blasting Systems, Inc. Article manipulator mechanism for accelerated shot treating apparatus
US4888863A (en) 1988-03-21 1989-12-26 Westinghouse Electric Corp. Method and apparatus for producing turbine blade roots
FR2689431B1 (fr) 1992-04-06 1995-10-20 Teknoson Procede et dispositif notamment de durcissement par ultrasons de pieces metalliques.
FR2713974B1 (fr) * 1993-12-22 1996-01-19 Snecma Dispositif de grenaillage de surfaces non accessibles par une canalisation droite.
FR2714629B1 (fr) * 1993-12-30 1996-06-07 Teknoson Sa Procédé et dispositif d'ébavurage de pièces mécaniques.
FR2715884B1 (fr) * 1994-02-04 1996-04-12 Gec Alsthom Electromec Procédé et dispositif pour le traitement de surface et la mise en précontrainte de la paroi intérieure d'une cavité.
US5620307A (en) * 1995-03-06 1997-04-15 General Electric Company Laser shock peened gas turbine engine blade tip
US5735044A (en) * 1995-12-12 1998-04-07 General Electric Company Laser shock peening for gas turbine engine weld repair
FR2743742B1 (fr) 1996-01-24 1998-04-03 Seb Sa Procede de traitement d'une surface metallique et de fabrication d'un article culinaire
US5813265A (en) 1997-12-12 1998-09-29 General Electric Company Balanced electromagnetic peening
US5950470A (en) * 1998-09-09 1999-09-14 United Technologies Corporation Method and apparatus for peening the internal surface of a non-ferromagnetic hollow part
US6170308B1 (en) * 1999-07-20 2001-01-09 United Technologies Corporation Method for peening the internal surface of a hollow part
FR2801236B1 (fr) 1999-11-18 2001-12-21 Snecma Procede et machine de grenaillage par ultrasons de pieces sur une roue
FR2801322B1 (fr) 1999-11-18 2002-02-08 Snecma Procede de grenaillage par ultrasons de surfaces annulaires de grandes dimensions sur des pieces minces
US6340500B1 (en) * 2000-05-11 2002-01-22 General Electric Company Thermal barrier coating system with improved aluminide bond coat and method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016100663A1 (de) * 2016-01-15 2017-07-20 Rolls-Royce Deutschland Ltd & Co Kg Vorrichtung und Verfahren zum Strahlverfestigen von Oberflächenbereichen, insbesondere von Tannenbaumprofilen

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FR2816538A1 (fr) 2002-05-17
CA2363306A1 (fr) 2002-05-16
FR2816538B1 (fr) 2003-01-17
CA2363306C (fr) 2008-04-01
JP2002200562A (ja) 2002-07-16
US6536109B2 (en) 2003-03-25
EP1207013A1 (de) 2002-05-22
US20020124402A1 (en) 2002-09-12
JP3974385B2 (ja) 2007-09-12
SG114512A1 (en) 2005-09-28

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