EP1101827B1 - Verfahren zum Ultraschall-Kugelstahlen von grossformatigen ringförmigen Oberflächen von dünnwandigen Werkstücken - Google Patents

Verfahren zum Ultraschall-Kugelstahlen von grossformatigen ringförmigen Oberflächen von dünnwandigen Werkstücken Download PDF

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Publication number
EP1101827B1
EP1101827B1 EP00403183A EP00403183A EP1101827B1 EP 1101827 B1 EP1101827 B1 EP 1101827B1 EP 00403183 A EP00403183 A EP 00403183A EP 00403183 A EP00403183 A EP 00403183A EP 1101827 B1 EP1101827 B1 EP 1101827B1
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EP
European Patent Office
Prior art keywords
opening
shot blasting
enclosure
microbeads
shot
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
Application number
EP00403183A
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English (en)
French (fr)
Other versions
EP1101827A1 (de
Inventor
Catherine Dominique Béatrice Duquenne
Véronique Christiane Raymonde Giffard
Gérard Michel Roland Gueldry
Claude Marcel Mons
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
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Publication date
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Publication of EP1101827A1 publication Critical patent/EP1101827A1/de
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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
    • 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
    • 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/04—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering with simultaneous application of supersonic waves, magnetic or electric fields
    • 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

Definitions

  • the invention relates to a method of ultrasonic shot blasting using a mist of microbeads inside an enclosure and more particularly to a shot blasting of large annular surfaces on parts thin.
  • microbeads are commonly rolling bearing balls. They are usually ceramic or steel with a diameter of 0.2mm to 4mm. The shot peening is carried out inside a closed cabin using powered nozzles simultaneously with compressed gas and microbeads, the compressed gas ensuring the propulsion of microbeads.
  • the patent FR.2,689,431 discloses a method of blasting said improperly “by ultrasound “consisting of maintaining a” fog "of microbeads inside a pregnant, the interview being carried out using a vibrator acting at frequencies of the order of 20 KH, the enclosure being open, the part being applied against the opening of the enclosure, shot blasting being ensured by the impacts of the microbeads on the part, the enclosure and the room being animated by a relative movement aiming at passing the enclosure on the entire surface of the piece to be blasted.
  • the patent also shows how shot blast circular parts such as trees.
  • fog is used by analogy with fogs formed of tiny droplets of water. Indeed, in the process of ultrasonic shot blasting, the microbeads are animated with random speeds in modulus and direction, which makes them ricochet between them, against the walls of the enclosure and against the surface of the room in contact with the mist of microbeads.
  • This patent gives examples of massive pieces able to resume without distort the stresses resulting from shot blasting.
  • this process does not allow to blast thin circular pieces, because they start to deform very early during shot blasting even. Even if the surface is uniformly blasted, these deformations are only partially absorbed at the end of shot blasting because the stress is achieved by the plastic and non-linear deformation of the material.
  • the process requires that shot blasting be stopped accurately when the piece has made a turn if you want to get a uniform shot blasting. Indeed, a late stop shot blasting produce a localized excess of shot blasting on a lap premature will produce a localized lack of shot blasting that will be difficult to complete without causing excessive blasting just next door.
  • a first problem to solve is to blast without deforming the thin parts and the dimensions of which are greater than those of the shot blasting chamber.
  • a second problem to be solved is to guarantee uniform shot blasting over the entire surface to be blasted.
  • the invention proposes a method of ultrasonic blasting of annular surfaces of large dimensions on thin pieces, said method of passing the surface to be shot-blasted in front of the opening of a blasting chamber, said enclosure containing a "mist" of microbeads maintained by a vibrator inside the enclosure, said microbeads impinging the portion of the surface to be blasted presented in front of the opening, said impacts causing shot blasting, said enclosure and said part being driven by a relative rotational movement to make the whole of the surface to be blasted in front of the opening of the enclosure during shot blasting.
  • shotblasting is done in N passes in front of the opening of the enclosure, each point of the shot-blasting surface passing N times before the opening of the enclosure, each passage providing a fraction substantially equal to 1 / N of total shot blasting to be done.
  • N 5 revolutions. This result will obviously be better with a higher number of revolutions, for example 20 or 100. A large number N is needed for shot blasting very thin.
  • An advantage of the method is to allow to allow a large shot blasting and pushed to optimal on thin parts without deforming them, since during all shot peening, the stresses imposed on the part remain uniform.
  • Part 1 is a training cone on a turbine engine for aircraft.
  • Part 1 consists of a thin wall and has a shape circle of revolution around a geometric axis 2.
  • Part 1 has a barrel 3 truncated cone whose end of larger diameter is extended radially by a flange 4, said flange 4 itself having a bearing surface 5 to be blasted, said bearing surface 5 being annular, flat and radial.
  • An enclosure 10 is used inside which is maintained a fog of microbeads 11, said enclosure being delimited laterally by a wall 12, said enclosure having an opening 13 whose edges are referenced 14.
  • a vibrator 20 constituted by a sonotrode 21 resonated by one its ends by a vibration generator 22 which is usually quartz, the other end of the sonotrode 21 having a vibrating surface 23 and substantially plane, said vibrating surface 23 being placed at the bottom of the enclosure 10 and being opposite of the opening 13.
  • the vibration generator 22 puts in longitudinal resonance the sonotrode 21.
  • the vibrating surface 23 thus excited transmits energy to the microbeads which bounce on the surface to be blasted 5 opposite the opening 13 and on the walls of the chamber 12, said microbeads then gradually losing energy, said microbeads also arriving on the vibrating surface 23 which gives them a new energy.
  • the microbeads move inside the enclosure at speeds random in size and direction, these microbeads thus forming a real "fog" of microbeads inside the enclosure 10.
  • An advantage of the method is that the shot peening is carried out without contact between the piece 1 and the enclosure 10, which avoids any degradation of the surface of the room.
  • the microbeads are retained inside the enclosure 10 because the game E is less than the diameter of said microbeads.
  • This arrangement also has the advantage of avoiding the use of wear pads on the enclosure 10
  • T To x ⁇ x D / L in which To is the duration of exposure to shot blasting of each element of the surface to be shot blasted 5, D is the average diameter of said surface 5 and L is the width of the enclosure 10 taken tangentially to the displacement of said surface 5 in front of the opening 13, that is to say perpendicular to the plane of the single figure.
  • the edges 14 of the enclosure 10 will be given a shape complementary to said surface, in order to maintain the game E.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sliding-Contact Bearings (AREA)

Claims (1)

  1. Verfahren zum Ultraschall-Kugelstrahlen von grossformatigen, ringförmigen Oberflächen an dünnwandigen Werkstücken, wobei das Verfahren darin besteht, die zu strahlende Oberfläche (5) an der Öffnung (13) eines geschlossenen Raums (10) zum Kugelstrahlen vorbeizuführen, wobei diese Öffnung (13) Ränder (14) aufweist, wobei dieser Raum (10) einen Mikrokügelchen-"Nebel" (11) einschließt, der im Inneren des geschlossenen Raums (10) mittels eines Vibrators (20) unterhalten wird, wobei diese Mikrokügelchen auf den vor der Öffnung (13) befindlichen Abschnitt der zu strahlenden Oberfläche (5) auftreffen, wobei dieses Auftreffen das Kugelstrahlen darstellen, wobei dieser geschlossene Raum (10) und dieses Werkstück (1) während des Strahlens in eine relative Drehbewegung versetzt werden, um die gesamte zu strahlende Oberfläche vor der Öffnung (13) vorbeizuführen,
       dadurch gekennzeichnet,    dass die zu strahlende Oberfläche (5) mit einem Spiel E, das kleiner ist als der Durchmesser der verwendeten Mikrokügelchen, vor der Öffnung (13) positioniert wird und dass diese Oberfläche während des Strahlens mindestens N = fünf Umdrehungen vor der Öffnung (13) vollführt.
EP00403183A 1999-11-18 2000-11-16 Verfahren zum Ultraschall-Kugelstahlen von grossformatigen ringförmigen Oberflächen von dünnwandigen Werkstücken Expired - Lifetime EP1101827B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9914481 1999-11-18
FR9914481A FR2801322B1 (fr) 1999-11-18 1999-11-18 Procede de grenaillage par ultrasons de surfaces annulaires de grandes dimensions sur des pieces minces

Publications (2)

Publication Number Publication Date
EP1101827A1 EP1101827A1 (de) 2001-05-23
EP1101827B1 true EP1101827B1 (de) 2005-01-26

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EP00403183A Expired - Lifetime EP1101827B1 (de) 1999-11-18 2000-11-16 Verfahren zum Ultraschall-Kugelstahlen von grossformatigen ringförmigen Oberflächen von dünnwandigen Werkstücken

Country Status (10)

Country Link
US (1) US6289705B1 (de)
EP (1) EP1101827B1 (de)
JP (1) JP4267199B2 (de)
CA (1) CA2325897C (de)
DE (1) DE60017681T2 (de)
ES (1) ES2233310T3 (de)
FR (1) FR2801322B1 (de)
RU (1) RU2210602C2 (de)
UA (1) UA66403C2 (de)
WO (1) WO2001036692A1 (de)

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US20050145306A1 (en) * 1998-09-03 2005-07-07 Uit, L.L.C. Company Welded joints with new properties and provision of such properties by ultrasonic impact treatment
US6338765B1 (en) 1998-09-03 2002-01-15 Uit, L.L.C. Ultrasonic impact methods for treatment of welded structures
US20060016858A1 (en) * 1998-09-03 2006-01-26 U.I.T., Llc Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment
FR2814099B1 (fr) * 2000-09-21 2002-12-20 Snecma Moteurs Grenaillage transversal par ultrassons des aubes sur un rotor
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
FR2816636B1 (fr) 2000-11-16 2003-07-18 Snecma Moteurs Grenaillage des sommets des aubes refroidies
FR2816538B1 (fr) 2000-11-16 2003-01-17 Snecma Moteurs Procede pour augmenter la duree de vie des attaches d'aubes sur un rotor
FR2816537B1 (fr) 2000-11-16 2003-01-17 Snecma Moteurs Procede et installation de grenaillage par ultrasons des alveoles annulaires d'attache d'aubes sur un rotor
FR2816536B1 (fr) 2000-11-16 2003-01-17 Snecma Moteurs Procede et dispositif de grenaillage par ultrasons des alveoles "axiales" d'attache des aubes sur un rotor
JP2005192194A (ja) * 2003-12-05 2005-07-14 Yazaki Corp 通信装置及び通信システム
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
US7301123B2 (en) 2004-04-29 2007-11-27 U.I.T., L.L.C. Method for modifying or producing materials and joints with specific properties by generating and applying adaptive impulses a normalizing energy thereof and pauses therebetween
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
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
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
US7276824B2 (en) * 2005-08-19 2007-10-02 U.I.T., L.L.C. Oscillating system and tool for ultrasonic impact treatment
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DE102006036519A1 (de) * 2006-08-04 2008-02-07 Mtu Aero Engines Gmbh Deckelelement für eine Sonotrode und Strahlkammeranordnung zum Oberflächenstrahlen von Bauteilen
FR2907360B1 (fr) * 2006-10-20 2009-05-22 Sonats Soc Des Nouvelles Appli Procedes et installations de grenailles.
US7665338B2 (en) * 2006-10-20 2010-02-23 Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces Shot peening methods and units
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Also Published As

Publication number Publication date
FR2801322A1 (fr) 2001-05-25
DE60017681D1 (de) 2005-03-03
ES2233310T3 (es) 2005-06-16
WO2001036692A1 (fr) 2001-05-25
FR2801322B1 (fr) 2002-02-08
DE60017681T2 (de) 2005-12-22
CA2325897A1 (fr) 2001-05-18
JP4267199B2 (ja) 2009-05-27
US6289705B1 (en) 2001-09-18
UA66403C2 (uk) 2004-05-17
JP2001170866A (ja) 2001-06-26
EP1101827A1 (de) 2001-05-23
RU2210602C2 (ru) 2003-08-20
CA2325897C (fr) 2007-09-18

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