EP0666142A1 - Method and device for the surface treatment and for the pre-stressing of the inner wall of a cavity - Google Patents
Method and device for the surface treatment and for the pre-stressing of the inner wall of a cavity Download PDFInfo
- Publication number
- EP0666142A1 EP0666142A1 EP95400207A EP95400207A EP0666142A1 EP 0666142 A1 EP0666142 A1 EP 0666142A1 EP 95400207 A EP95400207 A EP 95400207A EP 95400207 A EP95400207 A EP 95400207A EP 0666142 A1 EP0666142 A1 EP 0666142A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vibrator
- cavity
- orifice
- balls
- tubular part
- 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
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Classifications
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
- B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
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- 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
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S451/00—Abrading
- Y10S451/91—Ultrasonic
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- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/71—Vibrating
Definitions
- a usual shot peening by projection of balls through nozzles oriented towards the part to be treated gives no results on the walls of a cavity as defined above, since the only possible circulation of the balls in the cavity is carried out in a direction substantially parallel to the walls to be treated.
- the exciter-vibrator is arranged to excite the vibrator at its or at one of its natural frequencies.
- said tubular part comprises a support flange at its free end.
- turbine blades 10 are mounted on a disc 11 by means of two nested combs 12 and are made integral with the disc, for example by three pins 13 which are driven into suitable bores made through the disc 11 and the nested combs 12.
- the bore must be very precise and the condition of the surface is critical, it is necessary to perform a surfacing and a compression stressing of the internal wall of the defined cavity by said bore.
- This device essentially comprises a vibrator 20 in the form of a pot, one end of which 21 is defined by a tubular element 22 of determined length.
- a high frequency exciter-vibrator 23 is associated with this vibrator to ensure its excitation.
- the vibrator 20 and exciter-vibrator 23 assembly is placed at an orifice 25 in this cavity.
- the tubular element 22 of the vibrator 20 has a diameter slightly smaller than that of the cavity 24 and its end is engaged by a few millimeters in this cavity.
- the tubular member 22 of the vibrator 20 is provided with a flange 26 of annular shape surrounding the free end of this element. This variant makes it possible to use the vibrator for different diameters of cavities. The flange is pressed against the wall surrounding the orifice 25.
- FIG. 5 represents the vibrator 20 seen in axial section and makes it possible to understand its operation.
- This vibrator is excited at its natural frequency or at one of its natural frequencies.
- the node or one of the vibration nodes 30 occurs in its swollen part 31.
- the belly or one of the vibration bellies 32 is located at the end of the tubular element 22. The length of this tubular element is determined so as to that a vibrating belly corresponds to its end from where the balls are injected into the cavity.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
La présente invention concerne un procédé de traitement de surface et de mise en précontrainte de compression de la paroi intérieure d'une cavité comportant au moins un orifice, d'un tube, d'un alésage ou d'un trou usiné dans une pièce de mécanique.The present invention relates to a method of surface treatment and of compression prestressing of the internal wall of a cavity comprising at least one orifice, of a tube, of a bore or of a hole machined in a workpiece. mechanical.
Elle concerne également un dispositif pour la mise en oeuvre de ce procédé.It also relates to a device for implementing this method.
L'amélioration de l'état de surface d'une cavité, d'un tube, d'un alésage ou d'un trou usiné dans une pièce de mécanique, et la mise en compression de cette surface sont connues de l'homme de métier. A titre d'exemple, on peut pratiquer un sablage ou un corindonage pour atteindre ces objectifs. Toutefois, les effets de ces méthodes sont limités et on utilise plus couramment un grenaillage avec des billes d'acier, de verre ou de céramique. Pour traiter certaines surfaces, en particulier les parois d'une cavité de petites dimensions et notamment les parois d'un tube, d'un alésage ou d'un trou usiné ayant des dimensions longitudinales beaucoup plus importantes que ses dimensions transversales, ces méthodes connues sont inopérantes. Un grenaillage habituel par projection de billes au travers de buses orientées vers la pièce à traiter ne donne aucun résultat sur les parois d'une cavité telle que définie ci-dessus, étant donné que la seule circulation possible des billes dans la cavité s'effectue selon une direction sensiblement parallèle aux parois à traiter. Les impacts des billes sur les parois n'ayant pas lieu, ou du moins pas d'une manière suffisante pour assurer un traitement efficace de la surface, cette méthode ne peut pas être utilisée valablement dans ce cas.The improvement of the surface condition of a cavity, a tube, a bore or a hole machined in a mechanical part, and the compression of this surface are known to those skilled in the art. job. For example, we can practice sandblasting or corundum to achieve these goals. However, the effects of these methods are limited and shot peening with steel, glass or ceramic balls is more commonly used. To treat certain surfaces, in particular the walls of a cavity of small dimensions and in particular the walls of a tube, a bore or a machined hole having longitudinal dimensions much larger than its transverse dimensions, these known methods are inoperative. A usual shot peening by projection of balls through nozzles oriented towards the part to be treated gives no results on the walls of a cavity as defined above, since the only possible circulation of the balls in the cavity is carried out in a direction substantially parallel to the walls to be treated. The impacts of the balls on the walls not taking place, or at least not in a sufficient way to ensure an effective treatment of the surface, this method cannot be validly used in this case.
Une telle situation se présente notamment dans le domaine de la fabrication de turbines et plus particulièrement lors du montage des aubes de turbines dans les disques d'un rotor. Ce montage consiste à brocher deux peignes imbriqués, soit le peigne de l'aube et le peigne du disque par deux ou trois broches de fixation traversant les peignes imbriqués de part en part.Such a situation arises in particular in the field of turbine manufacturing and more particularly during the mounting of turbine blades in the discs of a rotor. This assembly consists in broaching two nested combs, that is to say the comb of the blade and the comb of the disc by two or three fixing pins passing through the nested combs right through.
Le montage habituel des aubes consiste à réaliser indépendamment sur l'aube et sur le disque un pré-trou de diamètre inférieur à celui du trou final, avant la mise en place de l'aube sur le disque. La mise à la cote du trou se fait au moyen d'un outil tel que par exemple un alésoir. Toutefois, l'état de surface du trou est de médiocre qualité, et l'outil, en écrouissant tangentiellement le métal, induit des contraintes résiduelles de traction, ce qui entraîne une grande sensibilité à la fissuration sous contrainte et une sensibilité accrue si des corrosions sont possibles. Pour ces raisons, une amélioration de l'état de surface s'impose particulièrement dans ce domaine où une grande fiabilité du montage est requise.The usual mounting of the blades consists in making independently on the blade and on the disk a pre-hole with a diameter smaller than that of the final hole, before the blade is placed on the disk. The dimensioning of the hole is done by means of a tool such as for example a reamer. However, the surface condition of the hole is of poor quality, and the tool, by tangentially hardening the metal, induces residual tensile stresses, which results in a high sensitivity to cracking under stress and an increased sensitivity if corrosions are possible. For these reasons, an improvement in the surface condition is particularly necessary in this area where high reliability of assembly is required.
Le procédé selon l'invention se propose de pallier les inconvénients de l'art antérieur et permet d'améliorer l'état de surface d'une manière suffisante pour satisfaire aux exigences les plus élevées dans des domaines où la qualité est synonyme de sécurité.The method according to the invention proposes to overcome the drawbacks of the prior art and makes it possible to improve the surface condition in a manner sufficient to meet the highest requirements in fields where quality is synonymous with safety.
Ce but est atteint par le procédé selon l'invention, caractérisé en ce que l'on procède à un grenaillage par ultra-sons en introduisant dans ladite cavité une grenaille composée de billes d'un diamètre déterminé et en mettant ces billes en résonance vibratoire au moyen d'un vibrateur . Le vibrateur, parfois appelé sonotrode est un appareil en forme de pot, réalisé dans un matériau à faible capacité d'amortissement des vibrations (par exemple le titane), destiné à amplifier ou entretenir un mouvement vibratoire disposé à proximité dudit orifice de ladite cavité et excitée par un excitateur-vibreur.This object is achieved by the method according to the invention, characterized in that one blasts with ultrasound by introducing into said cavity a shot composed of balls of a determined diameter and by putting these balls in vibrational resonance by means of a vibrator. The vibrator, sometimes called a sonotrode is a pot-shaped device, made of a material with low capacity vibration damping (for example titanium), intended to amplify or maintain a vibratory movement arranged near said orifice of said cavity and excited by an exciter-vibrator.
De préférence, l'on utilise un vibrateur en forme de pot ayant une partie enflée et une partie tubulaire et l'on excite ledit vibrateur à sa ou à une de ses fréquences propres.Preferably, a pot-shaped vibrator having a swollen part and a tubular part is used and said vibrator is excited at its or at one of its natural frequencies.
Lorsque l'on utilise un tel vibrateur, l'on introduit faiblement l'extrémité libre de ladite partie tubulaire dans ladite cavité.When using such a vibrator, the free end of said tubular part is slightly introduced into said cavity.
L'on peut également utiliser un vibrateur dont l'extrémité libre de ladite partie tubulaire est pourvue d'un flasque d'appui et dans ce cas l'on plaque ledit flasque contre la matière entourant ledit orifice de ladite cavité.One can also use a vibrator whose free end of said tubular part is provided with a support flange and in this case one presses said flange against the material surrounding said orifice of said cavity.
Dans le cas d'une cavité traversante, l'on plaque sur un deuxième orifice, opposé audit orifice à proximité duquel est disposée le vibrateur, un réflecteur agencé pour renvoyer les billes dans la cavité.In the case of a through cavity, a reflector arranged to return the balls into the cavity is placed on a second orifice, opposite to said orifice near which the vibrator is disposed.
De préférence l'on utilise comme réflecteur une plaque réalisée en un métal ou un alliage métallique identique à celui du vibrateur.Preferably, a plate made of a metal or a metal alloy identical to that of the vibrator is used as reflector.
De façon avantageuse, l'on détermine les dimensions du vibrateur de telle manière qu'on obtient un noeud de vibration dans la partie enflée et un ventre de vibration à l'extrémité libre de la partie tubulaire.Advantageously, the dimensions of the vibrator are determined in such a way that a vibration node is obtained in the swollen part and a vibration belly at the free end of the tubular part.
Dans le cas d'un tube dudgonné, caractérisé en ce que l'on injecte un jet d'air comprimé par un deuxième orifice opposé audit orifice à proximité duquel est disposée le vibrateur, pour limiter le champ de déplacement des billes.In the case of a dedicated tube, characterized in that a jet of compressed air is injected through a second orifice opposite to said orifice near which the vibrator is disposed, to limit the field of movement of the balls.
Dans ce même but, le dispositif selon l'invention est caractérisé en ce qu'il comporte un vibrateur, un excitateur-vibreur agencé pour exciter le vibrateur, et de la grenaille constituée de billes de diamètre prédéterminé, ces billes étant destinées à se mettre en résonance vibratoire à l'intérieur de ladite cavité, lorsque le vibrateur est monté à proximité de l'orifice de cette cavité et excitée par ledit excitateur-vibreur.For this same purpose, the device according to the invention is characterized in that it comprises a vibrator, an exciter-vibrator arranged to excite the vibrator, and shot made up of balls of predetermined diameter, these balls being intended to be put in vibrational resonance inside said cavity, when the vibrator is mounted near the orifice of this cavity and excited by said exciter-vibrator.
Dans la forme de réalisation préférée du dispositif, l'excitateur-vibreur est agencé pour exciter le vibrateur à sa ou à une de ses fréquences propres.In the preferred embodiment of the device, the exciter-vibrator is arranged to excite the vibrator at its or at one of its natural frequencies.
Dans cette forme de réalisation, ledit vibrateur comporte une partie enflée et une partie tubulaire et en ce que ses dimensions sont choisies pour qu'un noeud de vibration se forme dans sa partie enflée et qu'un ventre de vibration se forme à l'extrémité libre de sa partie tubulaire.In this embodiment, said vibrator has a swollen part and a tubular part and in that its dimensions are chosen so that a vibration node is formed in its swollen part and a vibration belly is formed at the end free of its tubular part.
De préférence, ladite partie tubulaire a une extrémité libre dont la dimension transversale est légèrement inférieure à celle de l'orifice de ladite cavité.Preferably, said tubular part has a free end whose transverse dimension is slightly less than that of the orifice of said cavity.
Dans une variante de réalisation, ladite partie tubulaire comporte un flasque d'appui à son extrémité libre.In an alternative embodiment, said tubular part comprises a support flange at its free end.
De façon avantageuse, le dispositif comporte un réflecteur agencé pour être plaqué contre un deuxième orifice de ladite cavité, opposé audit orifice à proximité duquel est disposée le vibrateur.Advantageously, the device comprises a reflector arranged to be pressed against a second orifice of said cavity, opposite to said orifice near which the vibrator is disposed.
La présente invention sera mieux comprise en référence à la description d'exemples de réalisation et aux dessins annexés dans lesquels :
- la figure 1 représente une vue en coupe radiale d'un disque de turbine dans lequel est implanté une aube de turbine,
- la figure 2 représente une vue en coupe selon un plan perpendiculaire à l'axe du disque de turbine de la figure 1,
- la figure 3 représente une vue en coupe axiale d'une première forme de réalisation du dispositif de l'invention,
- la figure 4 représente une vue en coupe axiale d'une deuxième forme de réalisation du dispositif de l'invention, et
- la figure 5 représente une vue en coupe axiale du vibrateur et illustre son principe de fonctionnement.
- FIG. 1 represents a view in radial section of a turbine disk in which a turbine blade is installed,
- FIG. 2 represents a sectional view along a plane perpendicular to the axis of the turbine disk of FIG. 1,
- FIG. 3 represents a view in axial section of a first embodiment of the device of the invention,
- FIG. 4 represents a view in axial section of a second embodiment of the device of the invention, and
- Figure 5 shows an axial sectional view of the vibrator and illustrates its operating principle.
En référence aux figures 1 et 2, des aubes 10 de turbine sont montées sur un disque 11 au moyen de deux peignes imbriqués 12 et sont rendues solidaires du disque, par exemple par trois broches 13 qui sont chassées dans des alésages appropriés ménagés à travers le disque 11 et les peignes imbriqués 12. Comme l'alésage doit être très précis et que l'état de la surface est critique, il est nécessaire d'effectuer un surfaçage et une mise en contrainte de compression de la paroi interne de la cavité définie par ledit alésage.With reference to FIGS. 1 and 2,
Le dispositif utilisé est représenté dans deux variantes de réalisation par les figures 3 et 4.The device used is represented in two alternative embodiments by FIGS. 3 and 4.
Ce dispositif comporte essentiellement un vibrateur 20 en forme de pot dont une extrémité 21 est définie par un élément tubulaire 22 de longueur déterminée. Un excitateur-vibreur 23 à haute fréquence est associé à ce vibrateur pour assurer son excitation. Pour obtenir le traitement de surface souhaité de la paroi intérieure de la cavité 24, on place l'ensemble vibrateur 20 et excitateur-vibreur 23 à un orifice 25 de cette cavité. Dans la réalisation représentée par la figure 3, l'élément tubulaire 22 du vibrateur 20 a un diamètre légèrement inférieur à celui de la cavité 24 et son extrémité est engagée de quelques millimètres dans cette cavité. Dans la réalisation représentée par la figure 4, l'élément tubulaire 22 du vibrateur 20 est munie d'un flasque 26 de forme annulaire entourant l'extrémité libre de cet élément. Cette variante permet d'utiliser le vibrateur pour différents diamètres de cavités. Le flasque est plaqué contre la paroi entourant l'orifice 25.This device essentially comprises a
Dans l'exemple représenté, la cavité 24 est traversante et un réflecteur 27 est utilisé pour obturer l'orifice 28 opposé à l'orifice 25. Ce réflecteur est constitué par une plaque plane qui est de préférence réalisée dans le même métal que le vibrateur, par exemple en titane ou alliage de titane. Dans le cas d'un tube dudgeonné, le réflecteur peut être remplacé par un jet d'air comprimé envoyé à l'intérieur du tube pour limiter le champ de déplacement des billes. Le traitement de surface proprement dit est fait par des billes 29 de préférence en acier qui sont préalablement placées dans la cavité et qui sont mises en vibration par le vibrateur 20 qui produit une résonance vibratoire sous l'excitation de l'excitateur-vibreur 23. La longueur et le diamètre du vibrateur, et notamment de l'élément tubulaire 22, sont choisis de telle façon que l'une de ses fréquences soit bien déterminée et se situe entre 10 et 30 MHz et de préférence soit environ égale à 20 MHz. Le matériau retenu pour la fabrication du vibrateur est un métal ou un alliage métallique ayant un faible coefficient d'amortissement vibratoire tel que par exemple le titane. Le réflecteur 27 est utilisé pour renvoyer les billes 29 dans le champ à traiter.In the example shown, the
La figure 5 représente le vibrateur 20 vue en coupe axiale et permet de comprendre son fonctionnement. Ce vibrateur est excité à sa fréquence propre ou à une de ses fréquences propres. Le noeud ou un des noeuds de vibration 30 se produit dans sa partie enflée 31. Le ventre ou un des ventres de vibration 32 est situé à l'extrémité de l'élément tubulaire 22. La longueur de cet élément tubulaire est déterminée de façon à ce qu'un ventre de vibration corresponde à son extrémité d'où les billes sont injectées dans la cavité.FIG. 5 represents the
Sous l'effet de l'excitation du vibrateur, les billes se mettent en mouvement très violent et viennent heurter les parois à grenailler dans toutes les directions et un grand nombre de fois, ce qui provoque un matage important desdites parois et, de ce fait, un arasage des traces de l'alésoir tout en induisant des contraintes résiduelles de compression sur une épaisseur pouvant être supérieure à celle d'un grenaillage classique.Under the effect of the excitation of the vibrator, the balls start to move very violently and strike the walls to be shot-blasted in all directions and a large number of times, which causes significant matting of said walls and, therefore , leveling the traces of the reamer while inducing residual compressive stresses over a thickness which may be greater than that of a conventional shot blasting.
L'intérêt d'un grenaillage par ultra-sons en comparaison avec le grenaillage classique est multiple : on constate une usure bien moins grande des billes qui conservent leur sphéricité beaucoup plus longtemps. Les impacts étant multidirectionnels, alors que dans un grenaillage classique les billes sont projetées selon une seule direction, le champ de contraintes résiduelles de compression est isotrope. En conséquence, grâce au grenaillage par ultrasons, on atteint un meilleur état de surface final et une mise en compression d'une épaisseur supérieure à celle atteinte par un grenaillage classique.The advantage of shot peening by ultrasound in comparison with conventional shot peening is manifold: there is much less wear on the balls which retain their sphericity much longer. The impacts being multidirectional, whereas in a conventional shot peening the balls are projected in a single direction, the residual compressive stress field is isotropic. Consequently, thanks to ultrasonic shot blasting, a better final surface condition is achieved and compression of a thickness greater than that achieved by conventional shot blasting.
La présente invention n'est pas limitée aux formes de réalisation décrites ci-dessus, mais peut subir différentes modifications et se présenter sous diverses variantes évidentes pour un homme du métier.The present invention is not limited to the embodiments described above, but can undergo different modifications and come in various variants obvious to a person skilled in the art.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR9401275 | 1994-02-04 | ||
FR9401275A FR2715884B1 (en) | 1994-02-04 | 1994-02-04 | Method and device for the surface treatment and the prestressing of the interior wall of a cavity. |
Publications (2)
Publication Number | Publication Date |
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EP0666142A1 true EP0666142A1 (en) | 1995-08-09 |
EP0666142B1 EP0666142B1 (en) | 1998-11-18 |
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ID=9459791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP95400207A Expired - Lifetime EP0666142B1 (en) | 1994-02-04 | 1995-02-01 | Method and device for the surface treatment and for the pre-stressing of the inner wall of a cavity |
Country Status (5)
Country | Link |
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US (1) | US5509286A (en) |
EP (1) | EP0666142B1 (en) |
JP (1) | JPH07224606A (en) |
DE (1) | DE69506010D1 (en) |
FR (1) | FR2715884B1 (en) |
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FR2908678A1 (en) * | 2007-11-27 | 2008-05-23 | Sonats Soc Des Nouvelles Appli | Blade shank processing device for e.g. automobile sector, involves shot blasting of internal edge of indent in shank of blade using shot blasting installation, where installation has sonotrode for propelling projectiles |
CN104002247A (en) * | 2014-05-14 | 2014-08-27 | 含山县众力铸造有限公司 | Grinding ball ejection cavity for shot blasting machine |
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FR2743742B1 (en) * | 1996-01-24 | 1998-04-03 | Seb Sa | PROCESS FOR TREATING A METAL SURFACE AND MANUFACTURING A CULINARY ARTICLE |
FR2753406B1 (en) * | 1996-09-16 | 1998-10-30 | Armines | DEVICE FOR TREATING WORKPIECES BY BLASTING, IN PARTICULAR BY MEANS OF STEEL BALLS MOVED BY AN ULTRASONIC FIELD |
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 |
FR2791293B1 (en) * | 1999-03-23 | 2001-05-18 | Sonats Soc Des Nouvelles Appli | IMPACT SURFACE TREATMENT DEVICES |
US6446013B1 (en) | 1999-07-20 | 2002-09-03 | United Technologies Corporation | Method for determining a peening element speed limit ratio when peening the internal surface of a hollow part |
US6170308B1 (en) | 1999-07-20 | 2001-01-09 | United Technologies Corporation | Method for peening the internal surface of a hollow part |
FR2801322B1 (en) * | 1999-11-18 | 2002-02-08 | Snecma | METHOD FOR ULTRASONIC BLASTING OF LARGE DIMENSIONAL ANNULAR SURFACES ON THIN PARTS |
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 |
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FR2812284A1 (en) * | 2000-07-28 | 2002-02-01 | Univ Troyes Technologie | Generating nanostructures to obtain on a metal workpiece surface a nanostructure layer with a specific thickness |
WO2002010463A1 (en) * | 2000-07-28 | 2002-02-07 | Universite De Technologie De Troyes | Mechanical method for generating nanostructures and mechanical device for generating nanostructures |
FR2908678A1 (en) * | 2007-11-27 | 2008-05-23 | Sonats Soc Des Nouvelles Appli | Blade shank processing device for e.g. automobile sector, involves shot blasting of internal edge of indent in shank of blade using shot blasting installation, where installation has sonotrode for propelling projectiles |
CN104002247A (en) * | 2014-05-14 | 2014-08-27 | 含山县众力铸造有限公司 | Grinding ball ejection cavity for shot blasting machine |
CN110629012A (en) * | 2018-06-25 | 2019-12-31 | 南京理工大学 | Method for realizing ultrahigh strain rate plastic deformation strengthening in metal |
CN110629012B (en) * | 2018-06-25 | 2021-05-07 | 南京理工大学 | Method for realizing ultrahigh strain rate plastic deformation strengthening in metal |
CN111112395A (en) * | 2020-01-03 | 2020-05-08 | 中国航空制造技术研究院 | Pre-bending tool for obtaining double-curvature wall plate and shot blasting forming process |
Also Published As
Publication number | Publication date |
---|---|
FR2715884B1 (en) | 1996-04-12 |
US5509286A (en) | 1996-04-23 |
JPH07224606A (en) | 1995-08-22 |
EP0666142B1 (en) | 1998-11-18 |
FR2715884A1 (en) | 1995-08-11 |
DE69506010D1 (en) | 1998-12-24 |
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