EP2093021B1 - Produit de plaque d'alliage d'aluminium doté de faibles niveaux de contrainte résiduelle et son procédé de fabrication - Google Patents

Produit de plaque d'alliage d'aluminium doté de faibles niveaux de contrainte résiduelle et son procédé de fabrication Download PDF

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Publication number
EP2093021B1
EP2093021B1 EP09150739A EP09150739A EP2093021B1 EP 2093021 B1 EP2093021 B1 EP 2093021B1 EP 09150739 A EP09150739 A EP 09150739A EP 09150739 A EP09150739 A EP 09150739A EP 2093021 B1 EP2093021 B1 EP 2093021B1
Authority
EP
European Patent Office
Prior art keywords
shot
blade
blisk
peening
nozzle unit
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.)
Ceased
Application number
EP09150739A
Other languages
German (de)
English (en)
Other versions
EP2093021A1 (fr
Inventor
Wolfgang Hennig
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.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
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 Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP2093021A1 publication Critical patent/EP2093021A1/fr
Application granted granted Critical
Publication of EP2093021B1 publication Critical patent/EP2093021B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
    • B24C3/20—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by turntables
    • B24C3/22—Apparatus using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • 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
    • Y10T29/49336—Blade making

Definitions

  • the invention relates to a method for the shot peening of blisk blades with a blasting material thrown onto the blade surfaces with the aid of compressed air or water.
  • a spherical blasting medium In the shot peening of the surface of workpieces, a spherical blasting medium is thrown with the aid of compressed air at high speed against the workpiece surface to be treated. In the material surface deformed by the shot peening through a plurality of calottes, residual compressive stresses are induced so that the risk of cracking is reduced and fatigue strength is increased. Associated with this are a weight reduction, a work hardening and an increase in service life. Shot blasting is known to have long been used with engine components and here also for blading blades.
  • Gas turbine rotors and in particular the rotors of gas turbine engine compressors, are designed with a blading integrally formed on the annular outer periphery of a disk for reliability, weight saving, power enhancement, and durability.
  • Such components are referred to as blisks, the term blisk being a shorthand of the English language term "blade integrated disk".
  • the production of blisks is known to be done by welding, in particular friction welding, separately manufactured blades with the peripheral annular surface of the preferably forged disc or by a proceeding from the outer annular surface of the disc material removal by means of cutting or chemical processes. After forming and finishing the blades, and after the blisk is heat-treated, the blisk blade surfaces can be shot-peened to increase their strength and life by introducing compressive residual stresses into the surface layer.
  • the invention has for its object to provide a method for shot peening the blades of Blisks or Blisktrommeln that ensures a low and no impairment of the blade shape uniform and high surface hardening of the blades.
  • the essence of the invention lies in the separate processing of each individual blisk with simultaneously and immediately opposite and with identical beam intensity and substantially perpendicular to the suction side and the pressure side impinging shot peening, which are guided in adjacent processing paths on the two side surfaces of the respective Bliskschaufel.
  • the beam intensity identical on both blade sides is achieved in that the distance between the jet exit plane and the irradiated surface on both blade sides is substantially the same.
  • the strength of the blisk blades is increased, so that increases in the fatigue strength and elimination of tensile stresses on the component surface are possible.
  • the risk of cracking is minimized, so that ultimately the life is increased. Due to the uniform, high beam intensity in all surface areas, small-diameter blasting balls can be used, so that even small radii in the transition area to the annulus are detected and hardened by shot blasting.
  • the shot peening (shot blast nozzles) have a rectangular cross-sectional shape and are guided in the longitudinal direction of the blisk blades in adjacent, preferably overlapping processing paths over the two blade surfaces.
  • the overlapping of the machining paths compensates for a lower beam intensity and spherical beam coverage in the edge region of the spherical jet.
  • An apparatus for carrying out the method according to the invention comprises a double-jet nozzle unit arranged at a movement unit with two elongated jet blast nozzles arranged at a distance and correspondingly adjustable with respect to the respective blade design, which have nozzle openings of the same shape and size arranged laterally at the same height and facing each other.
  • the double-jet nozzle unit can be moved with the jet nozzles arranged on both blade sides during processing in the longitudinal direction and in the transverse direction of the individual blisk blades and can also be pivoted about an X-axis and a Y-axis, so that the Shot blasting the scoop surfaces completely capture and also the curved and twisted shape of the blisk blades can follow at a constant distance and all blade areas are treated with substantially the same beam intensity.
  • the blasting material nozzles and the nozzle openings have a rectangular cross-section or a rectangular Gutaustrittsquerrough so that the blade surfaces can be uniformly shot-peened along wide, planar processing paths.
  • the nozzle openings are delimited at the free end-side end of the blasting material nozzles by a flat baffle plate arranged at an obtuse angle to the flow direction.
  • the blasting balls are deflected outwardly in the direction of the blade surface at an angle equal to or more than 90 °, such that the blade surfaces are predominantly perpendicularly struck by the blasting balls, but also the transition region of the blisk blade to the annulus of the blasting shot is detected.
  • the length of the blasting material nozzles is selected so that the blasting material emerging from the nozzle openings also detects the transition region.
  • Blisktrommel 3 comprises a moving unit 4, with a attached to a nozzle holder 5 double jet nozzle unit 6 according to the arrows A and B in the vertical direction and in the horizontal direction (see Fig. 1 ) can be moved and pivoted according to the arrow X about a horizontal axis and according to the arrow Y about a vertical axis (see Fig. 2 ) can be.
  • the double-jet nozzle unit 6 comprises two blasting-material nozzles 7, each designed as flat, rectangular and elongated hollow bodies, which are arranged with their broad sides spaced apart and substantially parallel to one another.
  • the distance between the two Strahlgutdüsen 7 is adjustable and is adjusted depending on the blade thickness-shape and distance so that the Strahlgutaustragsdüsen 7 do not contact the machined Bliskschaufeln 1 or these adjacent Bliskschaufeln during Kugelstrahlverfestigens.
  • the length of the Strahlgutdüsen 7 is greater than the maximum height of the machined Bliskschaufeln 1.
  • the two Strahlgutdüsen 7 have at the front free end in each case a laterally arranged, substantially over the entire width b reaching - rectangular - Nozzle opening 8 on.
  • the closed front end of the nozzle opening 8 and the Strahlgutdüse 7 is formed by an oblique, approximately at an angle of 45 ° extending baffle plate 9, at which the fed via the Strahlgutdüse 7 Strahlgutstrom or the Strahlgutkugeln 10 about 90 ° or larger and thus approximately perpendicular to the longitudinal extent of the Strahlgutdüsen 7 and to the flow direction in the Strahlgutdüsen 7 are discharged via the nozzle opening 8.
  • the nozzle openings 8 of the two Strahlgutaustragsdüsen 7 are directed towards each other and arranged exactly opposite each other.
  • the respective Strahlgutaustragsdüse 7 is connected to a Strahlgut arrangements Georgia 11, which in turn is connected to a Strahlgutzu operations effet 12 having a substantially circular cross-section.
  • the inner cross section of the Strahlgut executions Georgia 11 is formed so that the over the Strahlgutzu operationss effet 12 by means of compressed air or water supplied jet medium circular cross section of Strahlgutstroms gradually, that is without energy losses and turbulence of Strahlgutstroms and simultaneously increasing the speed of the solidification balls, in a rectangular inner cross section the Strahlgutaustragsdüsen 7 corresponding cross section is transferred.
  • the double-jet nozzle unit 6 is moved in a plurality of overlapping paths in the longitudinal direction of the blisk blade 1 to be individually processed by means of the movement unit 5.
  • the overlapping of the processing paths is required because the emerging at the edges of the nozzle opening 8 blasting material is slightly lower than in the Center.
  • the Bliskschaufel 1 is located during processing centrally between the two set at a distance corresponding to the cross-sectional profile of the respective Bliskschaufel Strahlgutdüsen 7, so that on the suction side and the pressure side of the Bliskschaufel 1 each opposite surface areas with a due to the central arrangement on both sides the same strong ball jet are acted upon and thus no deformation of the Bliskschaufeln 1 by unilateral or different strength in the action of the shot peening is recorded.
  • the double-jet nozzle unit 6 When the double-jet nozzle unit 6 is moved along the machining paths, the double-jet nozzle unit 6 is pivoted in accordance with the arrows X and / or Y so that the jet discharge plane follows the opposite nozzle openings 8 of the rotated blade shape and is oriented substantially parallel and equidistant from the blade surface.
  • the blasting material balls can have a comparatively small diameter, so that even areas with small radii, for example in the transition region between the lateral blade surfaces and the annulus, can be processed with the radiation medium and hardened by shot blasting. Due to the individual processing of the blisk blades, in which blasting shot with small diameter substantially perpendicular and impact with the same strength only on the side surfaces, in particular a deformation of the filigree formed, particularly easily deformable blade edges is prevented. With the method described above, each individual Bliskschaufel on the pressure side and the suction side is processed with the same beam intensity and fully shot-peened solid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Procédé pour consolider la surface d'aubes BLISK intégralement façonnées sur un rotor, consistant à appliquer un fluide de compression sur les surfaces d'aube, caractérisé en ce qu'à l'aide de jets de billes générés par de l'air comprimé et issus d'une unité à double buse de projection, mobile et pivotante le long des deux surfaces d'aube, chaque aube BLISK est individuellement traitée, simultanément des côtés refoulement et aspiration de l'aube BLISK le long de lignes de traitement juxtaposées sur des sections de surface directement opposées, avec des jets de billes d'intensités quasiment identiques percutant les surfaces à traiter sous un angle droit pour l'essentiel.
  2. Procédé selon la revendication n° 1, caractérisé en ce que les jets de billes sortant de l'unité à double buse de projection et percutant les deux surfaces d'aube ont chacun une section transversale de forme rectangulaire, sachant qu'un flux de grenaille tout d'abord cylindrique est accéléré et transformé dans l'unité à double buse de projection.
  3. Procédé selon la revendication n° 1, caractérisé en ce que les lignes de traitement consécutives sur les côtés d'aube respectifs se chevauchent afin de compenser la plus faible intensité des jets de billes dans les zones marginales.
  4. Procédé selon la revendication n° 1, caractérisé en ce que pour atteindre l'intensité de jet identique des deux côtés, la distance entre le plan de sortie de la grenaille sur l'unité à double buse de projection et les surfaces à traiter sur les deux côtés d'aube est maintenue constante pour l'essentiel.
  5. Procédé selon la revendication n° 1, caractérisé en ce que les billes des deux jets de billes sont expulsées pour l'essentiel perpendiculairement de l'unité à double buse de projection et sont projetées sur les surfaces d'aube à traiter selon un angle droit pour l'essentiel.
  6. Procédé selon la revendication n° 1, caractérisé en ce que la taille des billes dans les jets de billes est choisie de manière telle que de faibles rayons de gorge sont également alimentés en grenaille et consolidés par grenaillage.
EP09150739A 2008-02-25 2009-01-16 Produit de plaque d'alliage d'aluminium doté de faibles niveaux de contrainte résiduelle et son procédé de fabrication Ceased EP2093021B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008010847A DE102008010847A1 (de) 2008-02-25 2008-02-25 Verfahren und Vorrichtung zum Kugelstrahlverfestigen von Bliskschaufeln

Publications (2)

Publication Number Publication Date
EP2093021A1 EP2093021A1 (fr) 2009-08-26
EP2093021B1 true EP2093021B1 (fr) 2011-06-29

Family

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EP09150739A Ceased EP2093021B1 (fr) 2008-02-25 2009-01-16 Produit de plaque d'alliage d'aluminium doté de faibles niveaux de contrainte résiduelle et son procédé de fabrication

Country Status (3)

Country Link
US (1) US8256117B2 (fr)
EP (1) EP2093021B1 (fr)
DE (1) DE102008010847A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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DE102016100663A1 (de) 2016-01-15 2017-07-20 Rolls-Royce Deutschland Ltd & Co Kg Vorrichtung und Verfahren zum Strahlverfestigen von Oberflächenbereichen, insbesondere von Tannenbaumprofilen
DE102018110632A1 (de) 2018-05-03 2019-11-07 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung eines Bauteils

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Cited By (2)

* 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
DE102018110632A1 (de) 2018-05-03 2019-11-07 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung eines Bauteils

Also Published As

Publication number Publication date
US8256117B2 (en) 2012-09-04
DE102008010847A1 (de) 2009-08-27
US20100212157A1 (en) 2010-08-26
EP2093021A1 (fr) 2009-08-26

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