EP0522932B1 - Kugelstrahlverfahren für Werkstücke mit einer Methode zum Messen der Intensität und Anlage zur Durchführung des Verfahrens - Google Patents

Kugelstrahlverfahren für Werkstücke mit einer Methode zum Messen der Intensität und Anlage zur Durchführung des Verfahrens Download PDF

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Publication number
EP0522932B1
EP0522932B1 EP92401885A EP92401885A EP0522932B1 EP 0522932 B1 EP0522932 B1 EP 0522932B1 EP 92401885 A EP92401885 A EP 92401885A EP 92401885 A EP92401885 A EP 92401885A EP 0522932 B1 EP0522932 B1 EP 0522932B1
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EP
European Patent Office
Prior art keywords
shot
blasting
nozzle
component
parameters
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
EP92401885A
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English (en)
French (fr)
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EP0522932A1 (de
Inventor
José Company
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
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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Publication date
Application filed by Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0522932A1 publication Critical patent/EP0522932A1/de
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Publication of EP0522932B1 publication Critical patent/EP0522932B1/de
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Classifications

    • 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
    • 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
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • 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 present invention relates to a shot peening process for mechanical parts incorporating a method for measuring the peening intensity of mechanical pieces by LASER beam velocimetry as well as to a shot peening installation comprising the equipment for implementing said process.
  • Part shot peening techniques are well known and have been widely used, in particular in applications aimed at obtaining surface compression preloads in order to improve the service life of the parts, in particular by increasing the fatigue strength or resistance to corrosion under stress. In all cases, this involves projecting particles onto the surface of the part, in specific areas, to be treated usually under compressed air pressure.
  • the particles used are in particular spherical balls made of various materials depending on the applications such as steel, glass or ceramic.
  • the search for good quality assurance and in particular good reproducibility leads to defining and seeking faithful and reliable means of measuring a blasting intensity. This is particularly the case in the applications targeted by the invention of shot blasting of parts belonging to the aeronautical file.
  • An old and still commonly used method of measuring shot blasting intensities consists in producing Almen type test pieces which are flat test pieces subjected to the shot blasting shot and whose deformation arrow due to the stress state corresponds to a shot blasting intensity. identified on the Almen measurement scale.
  • this method has many drawbacks. It requires numerous manipulations and leads to the production of test tube supports according to a geometry representative of the parts which can have complex shapes, in particular when it is a question of parts of aeronautical engines. Furthermore, control cannot intervene only before or after carrying out the operation on the part and in the event of drift observed after an adjustment, no information on the causes can be collected by this method.
  • FR-A-2 312 775 provides for an inspection of the blasted surfaces compared to a control sample, in particular by using a coating having particular properties of radiation under fluorescent light.
  • FR-A-2 627 414 plans to equip a shot blasting installation with a device for regulating the supply pressure of the gas projection nozzle and with an independent means for adjusting the flow of particles.
  • FR-A-2 630 673 uses detectors located to the right of the shot blasting gun and one producing a force signal corresponding to the reaction force due to the operation of the gun and the other a signal representative of the quantity of shot blasting projected , the parameters controlled in this way being the mass flow and the average speed of the particles.
  • FR-A-2 590 826 also illustrates principles of automation of a shot peening installation, providing in particular a functional link between means for measuring a recovery rate on a test piece and means for controlling the characteristics of the shot blasting.
  • one of the aims of the invention is to provide better quality assurance for the shot blasting operation of the parts as well as a simplification. and a saving of time in the implementation of the peening process, this which frees up production potential and improves the method of measuring shot blasting intensity thanks to a determined choice of parameters and the use of suitable means.
  • the shot peening process according to the invention is in particular implemented on an automatic shot peening or shot peening installation comprising an enclosure provided with sealing means, a device ensuring the support and possible displacements of the part, in particular in rotation, at at least one shot projection nozzle, in particular in the form of balls, for example made of steel, said nozzle being connected to the appropriate air and ball supply devices and secured to a displacement device as well as the appropriate control devices, especially with digital control.
  • a shot peening installation of the aforementioned type intended for the implementation of a shot peening process in accordance with the intervention is characterized in that it is equipped with a LASER velocimetry measurement device placed outside the blasting chamber which includes a beam passage window, allowing the acquisition of the values of parameters of the particle jet: number N, dimensions and speed V of the particles and connected to a system for processing and recording the corresponding data, in particular the value of the energy shot blasting E T.
  • a particularly advantageous application of the invention relates to shot peening of mechanical parts of the shot blasting type with controlled intensity of superficial compressive stresses of the surface areas of the treated part.
  • Figure 1 thus schematizes an automatic installation 1 shot blasting or shot blasting machine comprising an enclosure 2 provided with access, inlet and outlet, equipped with sealing means, as in itself and not shown in detail in the drawings.
  • a device shown diagrammatically at 3 providing support and possible displacements by means of motorization means known per se and not shown on the drawings for the parts such as 4 and, on the other hand, at least one projection nozzle 5 secured to a displacement device symbolized at 6, connected to the structures of the machine and comprising motorization means known per se and not shown on the drawings.
  • said nozzle 5 is connected by means of flexible pipes such as 7 or rigid to adequate supply devices for air and for balls or particles to be sprayed equipped with known devices for controlling supply parameters such as pressure of air, particle flow rate, etc.
  • supply devices are also associated with additional devices known per se, such as a sorting system for the balls not shown in the drawing and not forming part of the present invention.
  • the installation 1 is supplemented by adequate control equipment symbolized at 8 which can in particular be numerically controlled, under the control of a program symbolized at 9.
  • the automatic shot blasting installation 1 is further equipped with a device 10 for measuring the shot blasting intensity.
  • said enclosure 2 includes a sight window 11 provided with suitable sealing and / or shutter equipment known per se and not shown in the drawings.
  • Said device 10 placed at the right of said window 11, outside the enclosure 2 performs measurements by velocimetry with LASER, according to an embodiment known per se.
  • Said device 10 thus comprises a LASER source symbolized at 10a, a duplicator at 12 and the corresponding optics 13 and 14 emitting the two LASER beams 15 and 16 which converge at a measurement point 17.
  • the reflection of the wave trains at said point of measure 17 produces a phase shift and a frequency change creating interference fringes and constituting a signal which is picked up by a detector 18.
  • the signal is processed and transmitted by an electronic device 19 to a microprocessor 20 associated with a printer 21.
  • the measuring device 10 previously described, integrated into the shot blasting installation 1 and constituting a principle measuring means known per se by LASER velocimetry and making it possible to deduce measurements from the analysis of the interference fringes between two LASER beams 15 and 16 allows the corresponding measurements to be made.
  • the quantities determined by the device 10 are in fact the dimensions of the particles projected, in particular the diameter d of the balls and the impact speed Vi, measured at the measurement point 17.
  • a diagram is obtained as shown by way of example in FIG. 2 showing a result of particle size distribution by the number N as a function of the diameter d.
  • each part shot blasting program in particular in the example application described where the invention is used for Automatic numerically controlled shot blasting machine provides for a determined number and locations in the course of control operations according to the invention according to the principle which has been described above.
  • the total duration of an acquisition is less than one minute; it is therefore possible without excessive increase in production cost or lengthening deadlines to plan several measures during shot peening operations which can last, depending on the parts treated, several tens of minutes.
  • the connection symbolized at 22 in FIG. 1 and established between the measurement microprocessor 20 and the machine control device 8 allows a fully automatic realization of the control operation.
  • the invention provides, among other advantages, an appreciable saving of time compared to methods requiring the production of test specimens outside the actual shot peening operation of the gain pieces is particularly sensitive in terms of machine occupation. Thanks to direct monitoring of the parameters actually influencing the blasting intensity, better quality assurance is also guaranteed by applying the method of the invention.
  • a report of the results of the checks carried out can be kept, as symbolized at 23 in FIG. 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laser Beam Processing (AREA)
  • General Factory Administration (AREA)
  • Powder Metallurgy (AREA)

Claims (2)

  1. Verfahren zum intensitätsgesteuerten Kugelstrahlen von mechanischen Werkstücken auf einer automatischen Strahlanlage, die ein mit Dichtungsmitteln ausgestattetes Schutzgehäuse, eine Vorrichtung zum Haltern und eventuellen Bewegen, insbesondere zum Drehen, des Werkstücks, wenigstens eine an entsprechende Vorrichtungen zur Zuführung von Luft und Kugeln angeschlossene und mit einer Bewegungseinrichtung fest verbundene Kugeldruckstrahldüse und die entsprechenden Steuereinrichtungen, vorzugsweise mit numerischer Steuerung, aufweist, gekennzeichnet durch folgende Verfahrensschritte:
    (a) die Strahldüse wird durch die numerische Steuerung in eine Meßposition bewegt, in der der Düsenausgang von dem Meßpunkt einen Abstand D hat, der gleich dem vorbestimmten, beim Strahlen des Werkstücks zwischen Düsenausgang und bestrahlter Oberfläche vorgesehenen Abstand D ist,
    (b) die numerische Steuerung löst das Aufschleudern der Partikel unter Arbeitsbedingungen aus, die identisch sind mit denjenigen, die für das Kugelstrahlen des Werkstücks angewendet werden, und es wird eine Phase zur Erfassung der Parameterwerte mit Hilfe einer Vorrichtung zur Laser-Geschwindigkeitsmessung ausgelöst, wobei diese Parameter sind:
    - die Abmessungen der aufgeschleuderten Partikel, insbesondere der Durchmesser der sphärischen Kugeln,
    - die Bewegungsgeschwindigkeit Vi der Partikel,
    - die Anzahl N der Partikel pro Zeiteinheit,
    (c) die Daten werden behandelt, verarbeitet und zu einem Mikroprozessor zur Steuerung der genannten Parameter übertragen, wobei die Masse m der Partikel aus den Abmessungen abgeleitet und der für die Messung der Intensität des Kugelstrahlens gewählte Parameter, der der Energie ET des Kugelstrahls entspricht, aus den genannten Parametern Masse m, Geschwindigkeit Vi und Anzahl N berechnet wird,
    (d) der in dem Verfahrensschritt (c) gewonnene Wert ET wird mit Schwellwerten verglichen, die zuvor in dem Speicher des Mikroprozessors gespeichert wurden,
    (e1) falls der Vergleich in dem Verfahrensschritt (d) zeigt, daß der gewonnene Wert ET nicht akzeptabel ist, wird an die Steuervorrichtung der Strahlanlage die Auslösung eines Programmstops für das Programm zum Kugelstrahlen des Werkstücks übertragen,
    (e2) falls der Vergleich in dem Verfahrensschritt (d) zeigt, daß der gewonnene Wert ET akzeptabel ist, wird das Programm fortgesetzt,
    (f) nach dem Verfahrensschritt (e2) wird die Rückkehr der Strahldüse in die Position zum programmgemäßen Kugelstrahlen des Werkstücks veranlaßt,
    (g) die Verfahrensschritte (a) bis (f) werden während des Ablaufs der Kugelstrahlbearbeitung des Werkstücks in ausgewählten und vorbestimmten Zeitpunkten wiederholt.
  2. Automatische Strahlanlage mit einem Schutzgehäuse (2), das mit Dichtungsmitteln und geeigneten Zuführungsvorrichtungen ausgestattet ist, mit einer Vorrichtung (3) zum Haltern und eventuellen Bewegen, insbesondere zum Drehen, des Werkstücks (4), mit wenigstens einer Kugeldruckstrahldüse (5), die an entsprechende Vorrichtungen zur Zuführung von Luft und Kugeln angeschlossen und mit einer Bewegungseinrichtung (6) fest verbunden ist, sowie mit den entsprechenden Steuereinrichtungen, vorzugsweise mit numerischer Steuerung,
       gekennzeichnet durch
       eine mit Laser-Geschwindigkeitsmessung arbeitende Meßvorrichtung (10), die außerhalb des Schutzgehäuses angeordnet ist, das ein Fenster (11) für den Strahlendurchgang aufweist, wobei diese Vorrichtung (10) die Erfassung der Parameterwerte des Kugelstrahls, nämlich die Anzahl N, die Geschwindigkeit Vi und die geometrischen Abmessungen ermöglicht und mit einem System (19-20-21) zur Verarbeitung und Registrierung der entsprechenden Daten, insbesondere des Werts der Energie ET des Kugelstrahls verbunden ist.
EP92401885A 1991-07-03 1992-07-02 Kugelstrahlverfahren für Werkstücke mit einer Methode zum Messen der Intensität und Anlage zur Durchführung des Verfahrens Expired - Lifetime EP0522932B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9108283A FR2678537B1 (fr) 1991-07-03 1991-07-03 Procede de grenaillage de pieces a methode de mesure d'intensite et installation de mise en óoeuvre.
FR9108283 1991-07-03

Publications (2)

Publication Number Publication Date
EP0522932A1 EP0522932A1 (de) 1993-01-13
EP0522932B1 true EP0522932B1 (de) 1995-06-14

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EP92401885A Expired - Lifetime EP0522932B1 (de) 1991-07-03 1992-07-02 Kugelstrahlverfahren für Werkstücke mit einer Methode zum Messen der Intensität und Anlage zur Durchführung des Verfahrens

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US (1) US5212976A (de)
EP (1) EP0522932B1 (de)
DE (1) DE69202927T2 (de)
FR (1) FR2678537B1 (de)

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US5293320A (en) * 1992-03-13 1994-03-08 General Electric Company Measurment of shot peening coverage by impact dent characterization
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US5702289A (en) * 1994-09-20 1997-12-30 Electronics, Incorporated Anti-gravity blast cleaning
US5686989A (en) * 1996-05-17 1997-11-11 Wisconsin Alumni Research Foundation Transient spray patternator
US6155245A (en) * 1999-04-26 2000-12-05 Zanzuri; Clement Fluid jet cutting system and method
FR2812285B1 (fr) * 2000-07-28 2003-02-07 Univ Troyes Technologie Procede de traitement de nanostructures et dispositif de traitement de nanostructures
US6651299B2 (en) * 2000-10-13 2003-11-25 Toyota Jidosha Kabushiki Kaisha Method and apparatus for manufacturing endless metallic belt, and the endless metallic belt manufactured by the method
US7003880B2 (en) * 2001-10-05 2006-02-28 Denso Corporation Injector nozzle and method of manufacturing injector nozzle
DE102004018586A1 (de) * 2004-04-16 2005-11-03 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Verfestigung eines Bauteils durch Bestrahlung seiner Oberfläche mit Strahlgut
US7140216B2 (en) * 2004-11-18 2006-11-28 General Electric Company laser aligned shotpeen nozzle
DE102006021223A1 (de) * 2006-05-06 2007-11-08 Mtu Aero Engines Gmbh Verfahren zum Oberflächenstrahlen eines Bauteils
CH707367A8 (de) 2012-12-18 2014-12-15 Micromachining Ag Verfahren zum Bearbeiten einer Folge von Werkstücken mittels mindestens eines Bearbeitungsstrahls.
SG10201602833VA (en) * 2016-04-11 2017-11-29 Abrasive Eng Pte Ltd Magnetic Valve for Shot Peening
FI20165678A7 (fi) * 2016-09-12 2018-03-13 Oseir Oy Menetelmä ja laitteisto kuulapuhalluksen ohjaamiseksi
US9846099B1 (en) * 2016-12-21 2017-12-19 Shockform Aeronautique Inc. Peening calibration unit, battery pack and system
CN107336142B (zh) * 2017-08-09 2019-03-19 山东大学 一种电磁辅助超声喷丸的装置及方法
DE102020123377A1 (de) 2020-09-08 2022-03-10 Sentenso Gmbh Almen-Messgerät mit automatischer Identifizierung von Almen-Prüfstreifen
FR3124412B1 (fr) * 2021-06-25 2023-10-27 Safran Procédé de grenaillage d’une pièce annulaire
CN114473876B (zh) * 2022-02-08 2023-03-24 成都中科翼能科技有限公司 一种清除叶片表面残余渗层的方法
CN115256063B (zh) * 2022-07-08 2023-12-26 广州大学 一种高效加工圆锥滚子轴承的超声强化研磨方法
US20240269801A1 (en) * 2023-02-09 2024-08-15 Electronics Inc. Controlling shot peening device via shot media velocity sensing
CN119558221B (zh) * 2024-11-15 2025-10-28 中航西安飞机工业集团股份有限公司 一种喷丸强化目标强度饱和曲线快速建立方法

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JP2709526B2 (ja) * 1990-05-10 1998-02-04 新東工業株式会社 ショットブラスト強さ検出装置

Also Published As

Publication number Publication date
DE69202927D1 (de) 1995-07-20
FR2678537B1 (fr) 1993-09-17
DE69202927T2 (de) 1995-12-14
FR2678537A1 (fr) 1993-01-08
US5212976A (en) 1993-05-25
EP0522932A1 (de) 1993-01-13

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