EP2164679B1 - Method and device for surface peening of a component in the region of a passage opening - Google Patents

Method and device for surface peening of a component in the region of a passage opening Download PDF

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Publication number
EP2164679B1
EP2164679B1 EP08773264A EP08773264A EP2164679B1 EP 2164679 B1 EP2164679 B1 EP 2164679B1 EP 08773264 A EP08773264 A EP 08773264A EP 08773264 A EP08773264 A EP 08773264A EP 2164679 B1 EP2164679 B1 EP 2164679B1
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EP
European Patent Office
Prior art keywords
passage opening
region
component
vibration device
counter
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.)
Not-in-force
Application number
EP08773264A
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German (de)
French (fr)
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EP2164679A1 (en
Inventor
Erwin Bayer
Eggert Reese
Jürgen STEINWANDEL
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.)
Airbus Defence and Space GmbH
MTU Aero Engines AG
Original Assignee
MTU Aero Engines GmbH
EADS Deutschland GmbH
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Publication date
Application filed by MTU Aero Engines GmbH, EADS Deutschland GmbH filed Critical MTU Aero Engines GmbH
Publication of EP2164679A1 publication Critical patent/EP2164679A1/en
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Publication of EP2164679B1 publication Critical patent/EP2164679B1/en
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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
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/083—Deburring
    • 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
    • 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 for surface blasting, in particular for ultrasonic shot peening, of a component in the region of a passage opening of the type indicated in the preamble of patent claim 1.
  • a device which comprises a vibration device in the form of an ultrasonic sonotrode for acting on or accelerating the blasting material and respective counter-elements.
  • the vibration device on one side and the respective counter element on the opposite side are arranged relative to a component region having the passage opening.
  • the blasting of the component then takes place in two stages. In a first stage, the edge region facing the vibration device is blasted between the surface of the corresponding side of the component region and an inner surface of the through-opening.
  • a counter element is used, which is plugged into the passage opening in the manner of a plug pin.
  • the counter element and the passage opening thus have substantially identical cross sections.
  • a different counter element is used, which rests flat on the opposite side of the vibration of the device on the corresponding surface of the corresponding component area.
  • document EP 1 623 794 shows a surface blasting method according to the preamble of claim 1.
  • Object of the present invention is to provide a method of the type mentioned, by means of which a particularly reliable and uniform solidification of the passage opening having component area can be achieved.
  • the counter element is arranged at a distance from the corresponding side of the component region.
  • the counter element in contrast to the prior art according to the DE 10 2004 059 592 A1 not directly to the corresponding surface area of the component to position, but rather to provide a corresponding distance.
  • a further advantage is, moreover, that both opposing edge regions between the respective surfaces and the inner surface of the passage opening can be simultaneously surface-blasted, so that the entire component in the region of the passage opening can be processed in one process step.
  • a method is provided with which a targeted treatment of through holes or boreholes in components made of aluminum-based alloys can be provided which tend, for example, with appropriate vibration load and / or static force or pressurization to cracking.
  • a targeted treatment of through holes or boreholes in components made of aluminum-based alloys can be provided which tend, for example, with appropriate vibration load and / or static force or pressurization to cracking.
  • one of the passage opening facing, non-planar inner side of the counter element is used, by means of which an edge region between a surface of the corresponding side of the component region and an inner surface of the passage opening is surface-blasted.
  • the use of a non-planar inner side of the counter element ensures that the edge side between the respective surface of the component and the inner surface of the through opening can be solidified or rounded in an ideal manner.
  • the inner surface is blasted particularly well and uniformly, in particular in the upper region, ie near the counter element.
  • a deflection tool is arranged in the passage opening.
  • a deflection tool which has a smaller cross-section than the corresponding passage opening, a targeted deflection of the abrasive material accelerated by the vibration device is achieved in the direction of the inner surface of the passage opening, so that it is solidified particularly reliably and homogeneously.
  • the deflection tool is arranged in the passage opening from the side of the counter element ago.
  • the deflection tool is positioned on the side opposite the vibration device, so that the abrasive material accelerated by the vibration device is deflected in a particularly advantageous manner by means of the deflection tool, in particular in the direction of the inner surface of the passage opening.
  • the deflection tool is arranged together with the counter element relative to the surface area of the component having the passage opening. This results in a procedurally particularly simple arrangement of the counter element and the deflection tool, wherein moreover can be ensured in a simple manner that the counter element and the deflection tool are always positioned consistently relative to each other. Thus, a particularly good reproducibility of surface blasting can be ensured.
  • the deflection tool dimensioned smaller than the passage opening in the cross section is moreover preferably arranged in a central region of the passage opening, so that it has a preferably uniform distance to the corresponding inner surface of the passage opening on all sides. As a result, a particularly homogeneous solidification of the inner surface of the passage opening is achieved.
  • the deflection tool is arranged over a partial length of the passage opening within the latter. Since, according to experience, the inner surface of the passage opening near the vibration device is sufficiently solidified, it is particularly necessary for the deflection tool to be positioned in the partial length of the passage opening which is arranged away from the vibration device. Thus, a total positioned over only a part of the length of the passage opening Deflection tool ensures an extremely homogeneous or uniform solidification of the inner surface of the passage opening.
  • a surface of the vibration device acting on the blasting material is arranged at a distance from the corresponding side of the surface region of the component.
  • the surface of the corresponding side of the component region facing the vibration device or an edge region between this surface and the inner surface of the through-opening is also solidified or rounded off in a particularly reliable manner.
  • both the counter element as well as the vibrating surface of the vibration device are arranged at a respective distance from the corresponding surface of the component, a particularly reliable solidification of the two edge regions between the respective surfaces and the inner surface of the through hole can be achieved.
  • the surface region of the component having the passage opening is arranged essentially horizontally and the vibration device is arranged below the surface region.
  • exposed areas occur where e.g. Bolt mounts are given with high force application or pressurization.
  • An example of such exposed locations are engine and surface fasteners or attachment points for external loads such as extra tanks or weapons.
  • through-holes for bolts in light metals for example in aluminum base alloys, which typically accommodate bolts of a Fe / Ni material, e.g. with vibration and
  • a device for this purpose, a device according to Fig. 1 a vibration device 10 shown in section, which comprises a corresponding surface 12, by means of which blasting material - in the present case in the form of steel balls 14 - can be acted upon or accelerated.
  • the vibration device 10 is designed, for example, as an ultrasonic sonotrode and oscillates-as indicated by the double arrow 16-approximately perpendicular to the surface 12 thereof FIG. 1 It can be seen that the vibration device 10 is arranged on a lower side 18 of an advantage region 20 of a component 22 which is approximately horizontally extending and shown cut.
  • a passage opening 24 is provided, which in the present example has a circular cross-section and serves to receive a bolt.
  • the component 22 may be, for example, a lightweight component from aircraft construction, which is created in particular from an aluminum-based alloy.
  • a variety of other components from the aircraft industry in particular in the form of engine parts would be conceivable.
  • FIG. 1 Furthermore, it can be seen that on one of the vibration device 10 opposite upper side 26 of the component portion 20 of the component 22, a counter element 28 is arranged, whose function will be explained in more detail below. Also, the counter element 28 is shown in the present case in a schematic sectional view.
  • both the vibration device 10 and the counter element 28 completely cover the clear cross section of the passage opening 24.
  • the vibration device 10 and the counter element 28 are associated with a blasting chamber 30, the blasting chamber walls 32 in FIG. 1 only extremely schematically represented by corresponding lines. It should therefore be explicitly noted that the vibration device 10 or its vibrating surface 12 is designed to be movable or vibrating relative to the blasting chamber 30 or its blasting chamber walls 32.
  • the component region 20 of the component 22 is held in such a manner by means of a holding device 34 or by means of retaining elements 36 shown only extremely schematically that the through-opening 24 is positioned within the blasting chamber 30.
  • the arrangement or positioning of the vibration device 10, the counter element 28 and the component region 20 relative to one another is achieved by the holding device 34 or the holding elements 36.
  • a deflection tool 38 is disposed within the passage opening 24. It can be seen that the deflection tool In addition, it can be seen that the deflection tool 38 is arranged in a central region of the passage opening 24 and is arranged over a partial length of the passage opening 24 within the latter. In the present exemplary embodiment, this partial length corresponds approximately to half the width of the component region 20. At its free end facing the vibration device 10, the deflection tool 38 comprises a deflection tip 40, the function of which will also be explained in more detail below.
  • the deflection tool 38 can be designed separately as well as integrally with the counter element 28. In one embodiment, the deflection tool 38 can be arranged together with the counter element 28 relative to the component region 20 having the passage opening 24.
  • the method to be carried out by means of the described device for ultrasonic shot peening of the component region 20 comprising the passage opening 24 is characterized in particular by the induction of an extremely homogeneous compressive residual stress profile or an extremely homogeneous solidification. Since the surface 12 of the vibration device 10 is arranged at a distance from the corresponding lower side 18, a part of the balls 14 accelerated by the surface 12 strikes a surface 42 of the lower side 18. In addition, part of the balls 14 impinge directly on the lower region of an inner surface 44 of the passage opening 24. In addition, the edge region 46 is uniformly surface-blasted between the surface 42 and the inner surface 44 of the passage opening, so that the edge region 46, on the one hand, solidifies and, on the other hand, is rounded off - provided with a radius.
  • a portion of the balls 14 accelerated by means of the surface 12 of the vibration device 10 is also deflected or diverted by means of the deflection tool 38 or the deflection tip 40 in such a way that the balls 14 in particular reach the upper area of the inner surface 44 of the passage opening 24.
  • a homogeneous hardening or a homogenous compressive residual stress profile over the entire inner surface 44 of the passage opening 24 is achieved by the deflection tool 38.
  • Another part of the balls 14 accelerated by the surface 12 of the vibration device 10 rebounds against the counter element 28, which is arranged at a distance from the corresponding upper side 26 of the component region 20.
  • One of the through-opening 24 facing inside 48 of the counter-element 28 is non-planar, but rather slightly tapered or obliquely formed in the present case. In this way, it is achieved, in particular, that the balls striking the inner side 48 are deflected obliquely outwards so that, on the one hand, a surface 50 of the upper side 26 of the component region 20 and, on the other hand, in particular an edge region 52 between the surface 50 and the inner surface 44 of the through-hole 24 solidifies becomes.
  • the edge region 52 between the surface 50 and the inner surface 44 is thereby simultaneously solidified and - provided with a radius - rounded.
  • the inner surface 44 could also have a different shape, in particular a rounded shape.
  • both the counter element 28 and the vibration device 10 are located within the blasting chamber 30, so that the amount of grit or steel balls 14 can be kept uniform in a simple manner. As a result, a particularly reproducible solidification result is achieved.
  • corresponding sealing elements or the like may be provided between the blasting chamber 30 and the component region 20 in order to prevent an undesired escape of blasting material.
  • the vibrating device 10 is arranged on the lower side 18 of the component region 20, the blasting material easily returns to the vibration device 10 solely on account of its gravitational force.
  • a method and a device are provided by means of which an extremely homogeneous compressive residual stress profile in the surface layers - in the present case the surfaces 42 and 50, the edge regions 46 and 52, and the inner surface 44 of the through hole 24 - can be created.
  • the counter element 28 ensures that through the through hole 24 upwardly emerging steel balls are preferably directed to the upper edge portion 52 and lead to rounding. This effect is obtained on the lower side 18 at the lower edge portion 46 from the outset.
  • the deflection tool 38 is guided from above, against the underside, whereby the homogeneous solidification is achieved.
  • FIG. 2 the depth distribution of the solidification or the compressive residual stress profile in the solidified edge layers or surfaces of the component, in particular in the region of the passage opening in a schematic diagram recognizable, wherein the ordinate the voltage and the abscissa is removed, the removal depth.
  • the homogeneous solidification of the corresponding components can be seen.

Abstract

A method and device for surface peening, particularly ultrasonic shot peening, of a component in the region of a passage opening is disclosed. A vibration device impinging the blasting material is disposed on one side and a counter-element is disposed on an opposite side relative to a component region having the passage opening. The counter-element is disposed at a distance relative to the corresponding side of the component region.

Description

Die Erfindung betrifft ein Verfahren zum Oberflächenstrahlen, insbesondere zum Ultraschall-Kugelstrahlen, eines Bauteils im Bereich einer Durchgangsöffnung der in dem Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a method for surface blasting, in particular for ultrasonic shot peening, of a component in the region of a passage opening of the type indicated in the preamble of patent claim 1.

Ein solches Verfahren ist beispielsweise bereits aus der DE 10 2004 059 592 A1 als bekannt zu entnehmen. Dabei wird eine Vorrichtung eingesetzt, welche eine Vibrationseinrichtung in Form einer Ultraschall-Sonotrode zur Beaufschlagung bzw. Beschleunigung des Strahlguts sowie jeweilige Gegenelemente umfasst. Zum Strahlen der Durchgangsöffnung werden dabei die Vibrationseinrichtung auf einer Seite und das jeweilige Gegenelement auf der gegenüberliegenden Seite relativ zu einem die Durchgangsöffnung aufweisenden Bauteilbereich angeordnet. Das Strahlen des Bauteils erfolgt dann zweistufig. In einer ersten Stufe wird der der Vibrationseinrichtung zugewandte Randbereich zwischen der Oberfläche der korrespondierenden Seite des Bauteilbereichs und einer Innenfläche der Durchgangsöffnung gestrahlt. Hierbei wird ein Gegenelement eingesetzt, welches nach Art eines Steckbolzens in die Durchgangsöffnung gesteckt ist. Das Gegenelement und die Durchgangsöffnung weisen somit im Wesentlichen identische Querschnitte auf.Such a method is for example already in the DE 10 2004 059 592 A1 to be known as known. In this case, a device is used, which comprises a vibration device in the form of an ultrasonic sonotrode for acting on or accelerating the blasting material and respective counter-elements. For blasting the passage opening, the vibration device on one side and the respective counter element on the opposite side are arranged relative to a component region having the passage opening. The blasting of the component then takes place in two stages. In a first stage, the edge region facing the vibration device is blasted between the surface of the corresponding side of the component region and an inner surface of the through-opening. Here, a counter element is used, which is plugged into the passage opening in the manner of a plug pin. The counter element and the passage opening thus have substantially identical cross sections.

In einem zweiten Schritt wird ein andersartiges Gegenelement eingesetzt, welches auf der der Vibrationseinrichtung gegenüberliegenden Seite des Bauteils plan an der korrespondierenden Oberfläche des entsprechenden Bauteilbereichs aufliegt. Insgesamt soll durch die beiden Schritte des Oberflächenstrahlens eine homogene Verfestigung der Oberflächen im Bereich der Durchgangsöffnung geschaffen werden, um somit eine Verbindung des Bauteils - vorliegend einer Rotorscheibe einer Gasturbine - zu schaffen, welche äußerst resistent gegen ein Versagen infolge einer Rissbildung ist.In a second step, a different counter element is used, which rests flat on the opposite side of the vibration of the device on the corresponding surface of the corresponding component area. Overall, a homogeneous hardening of the surfaces in the region of the passage opening is to be created by the two steps of surface blasting, thus providing a connection of the component - in this case a rotor disk of a gas turbine - which is extremely resistant to failure due to cracking.

Aus dem Dokument US-B1-6 189 356 ist ein ähnliches Verfahren - samt Vorrichtung - zum Strahlen eines Bauteils im Bereich einer Durchgangsöffnung bekannt. Gemäß Fig. 3 dieses Dokuments wird von der einer Strahldüse gegenüberliegenden Seite ein Gegenelement in Form eines angespitzten Bolzens in die Öffnung eingeführt, welches zugleich als Ablenkwerkzeug für die Strahlkugeln dient. Die Endbereiche der Durchgangsöffnung sind dabei mittels Masken geschützt. Ein Strahlen dieser Bereiche kann separat erfolgen.From the document US-B1-6,189,356 is a similar method - including device - known for blasting a component in the region of a through hole. According to Fig. 3 of this document is from the opposite of a jet nozzle side Counterelement introduced in the form of a sharpened pin in the opening, which also serves as a deflection tool for the blasting balls. The end portions of the through hole are protected by masks. A blasting of these areas can be done separately.

Dokument EP 1 623 794 zeigt ein Oberflächen-Strahlverfahren gemäß dem Oberbegriff von Anspruch 1.document EP 1 623 794 shows a surface blasting method according to the preamble of claim 1.

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren der eingangs genannten Art zu schaffen, mittels welchem eine besonders zuverlässige und gleichmäßige Verfestigung des die Durchgangsöffnung aufweisenden Bauteilbereichs erreicht werden kann.Object of the present invention is to provide a method of the type mentioned, by means of which a particularly reliable and uniform solidification of the passage opening having component area can be achieved.

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by a method having the features of claim 1. Advantageous embodiments with expedient developments of the invention are specified in the dependent claims.

Um eine äußerst zuverlässige und gleichmäßige Verfestigung des Bauteils im Bereich der Durchgangsöffnung zu ermöglichen, ist es bei dem erfindungsgemäßen Verfahren vorgesehen, dass das Gegenelement in einem Abstand zur korrespondierenden Seite des Bauteilbereichs angeordnet wird. Mit anderen Worten ist es erfindungsgemäß vorgesehen, das Gegenelement im Unterschied zum Stand der Technik gemäß der DE 10 2004 059 592 A1 nicht unmittelbar an dem entsprechenden Oberflächenbereich des Bauteils zu positionieren, sondern vielmehr einen entsprechenden Abstand vorzusehen.In order to enable a highly reliable and uniform solidification of the component in the region of the passage opening, it is provided in the method according to the invention that the counter element is arranged at a distance from the corresponding side of the component region. In other words, it is provided according to the invention, the counter element in contrast to the prior art according to the DE 10 2004 059 592 A1 not directly to the corresponding surface area of the component to position, but rather to provide a corresponding distance.

Somit wird auf äußerst einfache und zuverlässige Weise erreicht, dass beispielsweise ein Randbereich zwischen einer dem Gegenelement zugewandten Oberfläche der korrespondierenden Seite des Bauteilbereichs und einer Innenfläche der Durchgangsöfmungen gleichmäßig oberflächengestrahlt wird. Einhergehend damit kann auch eine gute Verrundung eines ursprünglich im Querschnitt im Wesentlichen eckigen Randbereichs erreicht werden, so dass dieser nach dem erfolgten Oberflächenstrahlen eine erwünschte Abrundung bzw. einen entsprechenden Radius aufweist.Thus, it is achieved in an extremely simple and reliable manner that, for example, an edge region between a counterelement facing surface of the corresponding side of the component region and an inner surface of Durchgangsöfmungen is uniformly surface blasted. Along with this, it is also possible to achieve a good rounding of an edge area, which is originally substantially rectangular in cross-section, so that it has a desired rounding or a corresponding radius after the surface blasting has taken place.

Durch die beabstandete Anordnung des Gegenelements relativ zu der entsprechenden Oberfläche der korrespondierenden Seite des Bauteilbereichs wird zudem erreicht, dass die Oberfläche nahe der Durchgangsöffnung ebenfalls besonders zuverlässig verfestigt wird. Ein weiterer Vorteil ist es darüber hinaus, dass beide einander gegenüberliegenden Randbereiche zwischen der jeweiligen Oberflächen und der Innenfläche der Durchgangsöffnung gleichzeitig oberflächengestrahlt werden können, so dass das gesamte Bauteil im Bereich der Durchgangsöffnung in einem Verfahrensschritt bearbeitet werden kann.Due to the spaced arrangement of the counter element relative to the corresponding surface of the corresponding side of the component area is also achieved that the Surface near the passage opening is also solidified particularly reliable. A further advantage is, moreover, that both opposing edge regions between the respective surfaces and the inner surface of the passage opening can be simultaneously surface-blasted, so that the entire component in the region of the passage opening can be processed in one process step.

Insbesondere ist vorliegend eine Methode geschaffen, mit der eine gezielte Behandlung von Durchgangsöffnungen bzw. Bohrlöchern in Bauteilen aus Aluminium-Basislegierungen bereitgestellt werden kann, die beispielsweise bei entsprechender Schwingungsbelastung und/oder statischer Kraft bzw. Druckbeaufschlagung zur Rissbildung neigen. Somit ist es bei derartigen Bauteilen von großer Bedeutung, ein homogenes Druckeigenspannungsprofil im Bereich der Durchgangsöffnung induzieren zu können. Dies wird mit dem vorliegenden Verfahren auf besonders vorteilhafte Weise erreicht.In particular, in the present case, a method is provided with which a targeted treatment of through holes or boreholes in components made of aluminum-based alloys can be provided which tend, for example, with appropriate vibration load and / or static force or pressurization to cracking. Thus, it is with such components of great importance to be able to induce a homogeneous compressive residual stress profile in the region of the passage opening. This is achieved with the present method in a particularly advantageous manner.

In weiterer Ausgestaltung der Erfindung hat es sich darüber hinaus als vorteilhaft gezeigt, wenn eine der Durchgangsöffnung zugewandte, nicht-planare Innenseite des Gegenelements eingesetzt wird, mittels welcher ein Randbereich zwischen einer Oberfläche der korrespondierenden Seite des Bauteilbereichs und einer Innenfläche der Durchgangsöffnung oberflächengestrahlt wird. Mit anderen Worten wird durch den Einsatz einer nicht-planaren Innenseite des Gegenelements erreicht, dass die Randseite zwischen der jeweiligen Oberfläche des Bauteils und der Innenfläche der Durchgangsöffnung auf ideale Weise verfestigt bzw. abgerundet werden kann. Natürlich wird darüber hinaus erreich, dass auch die Innenfläche insbesondere im oberen Bereich - also nahe des Gegenelements - besonders gut und gleichmäßig gestrahlt wird.In a further embodiment of the invention, it has also proven to be advantageous if one of the passage opening facing, non-planar inner side of the counter element is used, by means of which an edge region between a surface of the corresponding side of the component region and an inner surface of the passage opening is surface-blasted. In other words, the use of a non-planar inner side of the counter element ensures that the edge side between the respective surface of the component and the inner surface of the through opening can be solidified or rounded in an ideal manner. Of course, it is also achieved that the inner surface is blasted particularly well and uniformly, in particular in the upper region, ie near the counter element.

Es hat sich als zudem vorteilhaft gezeigt, dass ein Ablenkwerkzeug in der Durchgangsöffnung angeordnet wird. Durch ein derartiges Ablenkwerkzeug, welches im Querschnitt geringer bemessen ist als die korrespondierende Durchgangsöffnung, wird eine gezielte Ablenkung des durch die Vibrationseinrichtung beschleunigten Strahlguts in Richtung der Innenfläche der Durchgangsöffnung erreicht, so dass diese besonders zuverlässig und homogen verfestigt wird.It has also proven to be advantageous that a deflection tool is arranged in the passage opening. By means of such a deflection tool, which has a smaller cross-section than the corresponding passage opening, a targeted deflection of the abrasive material accelerated by the vibration device is achieved in the direction of the inner surface of the passage opening, so that it is solidified particularly reliably and homogeneously.

In diesem Zusammenhang hat es sich als weiter positiv gezeigt, dass das Ablenkwerkzeug von der Seite des Gegenelements her in der Durchgangsöffnung angeordnet wird. Demzufolge wird das Ablenkwerkzeug auf der der Vibrationseinrichtung gegenüber liegenden Seite positioniert, so dass das durch die Vibrationseinrichtung beschleunigte Strahlgut auf besonders vorteilhafte Weise mittels des Ablenkwerkzeugs insbesondere in Richtung der Innenfläche der Durchgangsöffnung abgelenkt wird.In this context, it has been found to be further positive that the deflection tool is arranged in the passage opening from the side of the counter element ago. As a result, the deflection tool is positioned on the side opposite the vibration device, so that the abrasive material accelerated by the vibration device is deflected in a particularly advantageous manner by means of the deflection tool, in particular in the direction of the inner surface of the passage opening.

Als weiterhin vorteilhaft hat es sich gezeigt, dass das Ablenkwerkzeug gemeinsam mit dem Gegenelement relativ zu dem die Durchgangsöffnung aufweisenden Oberflächenbereich des Bauteils angeordnet wird. Somit ergibt sich eine verfahrenstechnisch besonders einfache Anordnung des Gegenelements und des Ablenkwerkzeugs, wobei darüber hinaus auf einfache Weise sichergestellt werden kann, dass das Gegenelement und das Ablenkwerkzeug stets gleichbleibend relativ zueinander positioniert sind. Somit lässt sich eine besonders gute Reproduzierbarkeit des Oberflächenstrahlens gewährleisten. In diesem Zusammenhang hat es sich in weiterer Ausgestaltung der Erfindung als besonders vorteilhaft gezeigt, wenn das Ablenkwerkzeug und das Gegenelement einteilig ausgebildet sind.As a further advantage, it has been shown that the deflection tool is arranged together with the counter element relative to the surface area of the component having the passage opening. This results in a procedurally particularly simple arrangement of the counter element and the deflection tool, wherein moreover can be ensured in a simple manner that the counter element and the deflection tool are always positioned consistently relative to each other. Thus, a particularly good reproducibility of surface blasting can be ensured. In this context, it has been found in a further embodiment of the invention to be particularly advantageous when the deflection tool and the counter-element are integrally formed.

Das im Querschnitt geringer als die Durchgangsöffnung bemessene Ablenkwerkzeug wird zudem bevorzugterweise in einem zentralen Bereich der Durchgangsöffnung angeordnet, so dass dieses nach allen Seiten hin einen vorzugsweise gleichmäßigen Abstand zur korrespondierenden Innenfläche der Durchgangsöffnung aufweist. Hierdurch wird eine besonders homogene Verfestigung der Innenfläche der Durchgangsöffnung erreicht.The deflection tool dimensioned smaller than the passage opening in the cross section is moreover preferably arranged in a central region of the passage opening, so that it has a preferably uniform distance to the corresponding inner surface of the passage opening on all sides. As a result, a particularly homogeneous solidification of the inner surface of the passage opening is achieved.

Zudem vorteilhaft ist es, wenn das Ablenkwerkzeug über eine Teillänge der Durchgangsöffnung innerhalb dieser angeordnet ist. Da erfahrungsgemäß die Innenfläche der Durchgangsöffnung nahe der Vibrationseinrichtung hinreichend verfestigt wird, ist es insbesondere erforderlich, dass das Ablenkwerkzeug in derjenigen Teillänge der Durchgangsöffnung positioniert wird, welche von der Vibrationseinrichtung entfernt angeordnet ist. Somit wird insgesamt durch ein über lediglich eine Teillänge der Durchgangsöffnung positioniertes Ablenkwerkzeug eine äußerst homogene bzw. gleichmäßige Verfestigung der Innenfläche der Durchgangsöffnung gewährleistet.It is also advantageous if the deflection tool is arranged over a partial length of the passage opening within the latter. Since, according to experience, the inner surface of the passage opening near the vibration device is sufficiently solidified, it is particularly necessary for the deflection tool to be positioned in the partial length of the passage opening which is arranged away from the vibration device. Thus, a total positioned over only a part of the length of the passage opening Deflection tool ensures an extremely homogeneous or uniform solidification of the inner surface of the passage opening.

Zudem vorteilhaft ist es, wenn eine das Strahlgut beaufschlagende Oberfläche der Vibrationseinrichtung in einem Abstand zur korrespondierenden Seite des Oberflächenbereichs des Bauteils angeordnet wird. Somit kann gewährleistet werden, dass auch die der Vibrationseinrichtung zugewandte Oberfläche der korrespondierenden Seite des Bauteilbereichs bzw. ein Randbereich zwischen dieser Oberfläche und der Innenfläche der Durchgangsöffnung besonders zuverlässig verfestigt bzw. abgerundet wird. Wenn somit insgesamt sowohl das Gegenelement wie auch die vibrierende Oberfläche der Vibrationseinrichtung in einem jeweiligen Abstand zur korrespondierenden Oberfläche des Bauteils angeordnet sind, kann eine besonders zuverlässige Verfestigung der beiden Randbereiche zwischen den jeweiligen Oberflächen und der Innenfläche der Durchgangsöffnung erzielt werden.It is also advantageous if a surface of the vibration device acting on the blasting material is arranged at a distance from the corresponding side of the surface region of the component. Thus, it can be ensured that the surface of the corresponding side of the component region facing the vibration device or an edge region between this surface and the inner surface of the through-opening is also solidified or rounded off in a particularly reliable manner. Thus, if both the counter element as well as the vibrating surface of the vibration device are arranged at a respective distance from the corresponding surface of the component, a particularly reliable solidification of the two edge regions between the respective surfaces and the inner surface of the through hole can be achieved.

Um eine besonders vorteilhafte Verfestigung des Bauteils im Bereich der Durchgaligsöffnung zu erreichen, hat es sich als weiter vorteilhaft gezeigt, wenn der die Durchgangsöffnung aufweisende Oberflächenbereich des Bauteils im Wesentlichen horizontal und die Vibrationseinrichtung unterhalb des Oberflächenbereichs angeordnet werden.In order to achieve a particularly advantageous solidification of the component in the region of the through-opening, it has proven to be further advantageous if the surface region of the component having the passage opening is arranged essentially horizontally and the vibration device is arranged below the surface region.

Schließlich hat sich ein Verfahren als vorteilhaft gezeigt, bei welchem der Bauteilbereich innerhalb einer Strahlkammer positioniert wird, in welcher neben diesem zusätzlich die Vibrationseinrichtung und das Gegenelement angeordnet sind. Durch eine derartige Strahlkammer kann die Menge an Strahlgut auf einfache Weise gleichmäßig gehalten werden, so dass sich ein äußerst reproduzierbares Strahlergebnis erzielen lässtFinally, a method has been found to be advantageous in which the component region is positioned within a blasting chamber in which, in addition to this, the vibration device and the counter element are additionally arranged. By means of such a blasting chamber, the amount of blasting material can be kept uniform in a simple manner, so that an extremely reproducible blasting result can be achieved

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels sowie anhand der Zeichnungen; diese zeigen in:

Figur 1
eine schematische Schnittansicht durch eine Vorrichtung zum Ultraschall-Kugelstrahlen eines Bauteils im Bereich einer Durchgangsöffnung, wobei eine das Strahlgut beaufschlagende Vibrationseinrichtung zu einer unteren Seite und ein Gegenelement auf einer gegenüberliegenden oberen Seite relativ zu dem die Durchgangsöffnung aufweisenden Bauteilbereich angeordnet ist, und wobei sowohl die Vibrationseinrichtung wie auch das Gegenelement in einem jeweiligen Abstand zur korrespondierenden Seite des Bauteilbereichs angeordnet sind; und in
Figur 2
ein schematisches Diagramm der Tiefenverteilung der Verfestigung bzw. des Druckeigenspannungsprofils in den verfestigten Randschichten bzw. Oberflächen des Bauteils insbesondere im Bereich der Durchgangsöffnung.
Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawings; these show in:
FIG. 1
a schematic sectional view through an apparatus for ultrasonic shot peening of a component in the region of a through hole, wherein a blasting material acting on the vibrating device is arranged to a lower side and a counter element on an opposite upper side relative to the passage opening having the component region, and wherein both the vibration device as well as the counter element are arranged at a respective distance to the corresponding side of the component area; and in
FIG. 2
a schematic diagram of the depth distribution of the solidification or the compressive residual stress profile in the solidified surface layers or surfaces of the component, in particular in the region of the passage opening.

Beispielsweise im Flugzeugbau treten exponierte Stellen auf, an denen z.B. Bolzenbefestigungen mit hoher Krafteinleitung bzw. Druckbeaufschlagung gegeben sind. Ein Beispiel für derartige exponierte Stellen sind Triebwerks- und Flächenbefestigungen oder Befestigungsstellen für externe Lasten wie Zusatztanks oder Waffen. Bei Durchgangsöffnungen für Bolzen in Leichtmetallen, beispielsweise in Aluminium-Basislegierungen, welche in der Regel Bolzen aus einem Fe/Ni-Material aufnehmen, ist z.B. mit Schwingungs- undIn aircraft construction, for example, exposed areas occur where e.g. Bolt mounts are given with high force application or pressurization. An example of such exposed locations are engine and surface fasteners or attachment points for external loads such as extra tanks or weapons. For through-holes for bolts in light metals, for example in aluminum base alloys, which typically accommodate bolts of a Fe / Ni material, e.g. with vibration and

Spannungsrisskorrosion zu rechnen. Dabei tritt die Beschädigung in jedem Fall auf der Seite des Leichmetalls, also im Bereich der Durchgangsöffnung für den Bolzen, auf. Unbehandelte Oberflächen führen dabei in Abhängigkeit relevanter Parameter wie Druck, Krafteinleitung oder Schwindungsbelastung zum schnellen Versagen infolge einer massiven Rissbildung. Es ist daher unbedingt erforderlich, in der Randschicht entsprechender Durchgangsöffnungen ein geeignetes Druckeigenspannungsprofil bzw. eine geeignete Verfestigung aufzubauen.Stress corrosion cracking to be expected. In this case, the damage occurs in any case on the side of the light metal, ie in the region of the passage opening for the bolt on. Untreated surfaces lead to rapid failure as a result of massive cracking, depending on relevant parameters such as pressure, force application or shrinkage stress. It is therefore absolutely necessary to construct a suitable compressive residual stress profile or suitable solidification in the boundary layer of corresponding passage openings.

Aus diesem Grund wird vorliegend ein Verfahren sowie eine Vorrichtung vorgeschlagen, mittels welchen Druckeigenspannungen zur Vermeidung von Spannungs-Risskorrosion oder dergleichen induziert werden können.For this reason, a method and a device are proposed in the present case by means of which residual compressive stresses can be induced to avoid stress corrosion cracking or the like.

Hierzu umfasst eine Vorrichtung gemäß Fig. 1 eine im Schnitt dargestellte Vibrationseinrichtung 10, welche eine entsprechende Oberfläche 12 umfasst, mittels welcher Strahlgut - vorliegend in Form von Stahlkugeln 14 - beaufschlagt bzw. beschleunigt werden kann. Die Vibrationseinrichtung 10 ist vorliegend beispielsweise als Ultraschall-Sonotrode ausgebildet und oszilliert - wie durch den Doppelpfeil 16 angedeutet - etwa senkrecht bezogen auf deren Oberfläche 12. Aus Figur 1 ist erkennbar, dass die Vibrationseinrichtung 10 auf einer unteren Seite 18 eines vorliegend etwa horizontal verlaufenden, geschnitten dargestellten Vorteilbereichs 20 eines Bauteils 22 angeordnet ist.For this purpose, a device according to Fig. 1 a vibration device 10 shown in section, which comprises a corresponding surface 12, by means of which blasting material - in the present case in the form of steel balls 14 - can be acted upon or accelerated. In the present case, the vibration device 10 is designed, for example, as an ultrasonic sonotrode and oscillates-as indicated by the double arrow 16-approximately perpendicular to the surface 12 thereof FIG. 1 It can be seen that the vibration device 10 is arranged on a lower side 18 of an advantage region 20 of a component 22 which is approximately horizontally extending and shown cut.

Im Bauteilbereich 20 des Bauteils 22 ist eine Durchgangsöffnung 24 vorgesehen, welche vorliegend beispielsweise einen kreisrunden Querschnitt aufweist und zur Aufnahme eines Bolzens dient. Das Bauteil 22 kann beispielsweise ein Leichtbauteil aus dem Flugzeugbau sein, welches insbesondere aus einer Aluminium-Basislegierung geschaffen ist. Natürlich wäre eine Vielzahl von anderen Bauteilen aus dem Flugzeugbau insbesondere auch in Form von Triebwerksteilen denkbar. Natürlich wäre es auch denkbar, die beschriebene Vorrichtung bzw. das zugehörige Verfahren bei Bauteilen außerhalb des Flugzeugbaus einzusetzen.In the component region 20 of the component 22, a passage opening 24 is provided, which in the present example has a circular cross-section and serves to receive a bolt. The component 22 may be, for example, a lightweight component from aircraft construction, which is created in particular from an aluminum-based alloy. Of course, a variety of other components from the aircraft industry in particular in the form of engine parts would be conceivable. Of course, it would also be conceivable to use the described device or the associated method for components outside the aircraft industry.

Aus Figur 1 ist des Weiteren erkennbar, dass auf einer der Vibrationseinrichtung 10 gegenüber liegenden oberen Seite 26 des Bauteilbereichs 20 des Bauteils 22 ein Gegenelement 28 angeordnet ist, dessen Funktion im Weiteren noch näher erläutert werden wird. Auch das Gegenelement 28 ist vorliegend in einer schematischen Schnittansicht dargestellt.Out FIG. 1 Furthermore, it can be seen that on one of the vibration device 10 opposite upper side 26 of the component portion 20 of the component 22, a counter element 28 is arranged, whose function will be explained in more detail below. Also, the counter element 28 is shown in the present case in a schematic sectional view.

Es ist erkennbar, dass sowohl die Vibrationseinrichtung 10 wie auch das Gegenelement 28 vollständig den lichten Querschnitt der Durchgangsöffnung 24 überdecken. Die Vibrationseinrichtung 10 und das Gegenelement 28 sind einer Strahlkammer 30 zugeordnet, deren Strahlkammerwände 32 in Figur 1 lediglich äußerst schematisch durch entsprechende Linien dargestellt sind. Es sei deshalb explizit angemerkt, dass die Vibrationseinrichtung 10 bzw. deren schwingende Oberfläche 12 relativ zur Strahlkammer 30 bzw. deren Strahlkammerwände 32 beweglich bzw. vibrierend ausgebildet ist.It can be seen that both the vibration device 10 and the counter element 28 completely cover the clear cross section of the passage opening 24. The vibration device 10 and the counter element 28 are associated with a blasting chamber 30, the blasting chamber walls 32 in FIG. 1 only extremely schematically represented by corresponding lines. It should therefore be explicitly noted that the vibration device 10 or its vibrating surface 12 is designed to be movable or vibrating relative to the blasting chamber 30 or its blasting chamber walls 32.

Der Bauteilbereich 20 des Bauteils 22 ist vorliegend mittels einer Halteeinrichtung 34 bzw. mittels von lediglich äußerst schematisch dargestellten Halteelementen 36 derart gehalten, dass die Durchgangsöffung 24 innerhalb der Strahlkammer 30 positioniert ist. Durch die Halteeinrichtung 34 bzw. die Haltelemente 36 wird zudem die Anordnung bzw. Positionierung der Vibrationseinrichtung 10, des Gegenelements 28 sowie des Bauteilbereichs 20 relativ zueinander erreicht.In the present case, the component region 20 of the component 22 is held in such a manner by means of a holding device 34 or by means of retaining elements 36 shown only extremely schematically that the through-opening 24 is positioned within the blasting chamber 30. In addition, the arrangement or positioning of the vibration device 10, the counter element 28 and the component region 20 relative to one another is achieved by the holding device 34 or the holding elements 36.

Von der oberen Seite 26 - also der Seite des Gegenelements 28 her - ist ein Ablenkwerkzeug 38 innerhalb der Durchgangsöffnung 24 angeordnet. Es ist erkennbar, dass das Ablenkwerkzeug 38 im Querschnitt geringer ausgebildet ist als der Querschnitt der Durchgangsöffnung 24. Des Weiteren ist erkennbar, dass das Ablenkwerkzeug 38 in einem zentralen Bereich der Durchgangsöffnung 24 angeordnet ist und über eine Teillänge der Durchgangsöffnung 24 innerhalb dieser angeordnet ist. Im vorliegenden Ausführungsbeispiel entspricht diese Teillänge etwa der halben Breite des Bauteilbereichs 20. An seinem der Vibrationseinrichtung 10 zugewandten freien Ende umfasst das Ablenkwerkzeug 38 eine Ablenkspitze 40, deren Funktion im Weiteren ebenfalls noch näher erläutert werden wird. Das Ablenkwerkzeug 38 kann sowohl separat zu sowie auch einteilig mit dem Gegenelement 28 ausgeführt sein. In einer Ausführungsform ist das Ablenkwerkzeug 38 dabei gemeinsam mit dem Gegenelement 28 relativ zu dem die Durchgangsöffnung 24 aufweisenden Bauteilbereich 20 anordnenbar.From the upper side 26 - thus the side of the counter element 28 ago - a deflection tool 38 is disposed within the passage opening 24. It can be seen that the deflection tool In addition, it can be seen that the deflection tool 38 is arranged in a central region of the passage opening 24 and is arranged over a partial length of the passage opening 24 within the latter. In the present exemplary embodiment, this partial length corresponds approximately to half the width of the component region 20. At its free end facing the vibration device 10, the deflection tool 38 comprises a deflection tip 40, the function of which will also be explained in more detail below. The deflection tool 38 can be designed separately as well as integrally with the counter element 28. In one embodiment, the deflection tool 38 can be arranged together with the counter element 28 relative to the component region 20 having the passage opening 24.

Das mittels der beschriebenen Vorrichtung durchzuführende Verfahren zum Ultraschall-Kugelstrahlen des die Durchgangsöffnung 24 umfassenden Bauteilbereichs 20 zeichnet sich insbesondere durch die Induktion eines äußerst homogenen Druckeigenspannungsprofils bzw. einer äußerst homogenen Verfestigung aus. Da die Oberfläche 12 der Vibrationseinrichtung 10 in einem Abstand zur korrespondierenden unteren Seite 18 angeordnet ist, trifft ein Teil der durch die Oberfläche 12 beschleunigten Kugeln 14 auf eine Oberfläche 42 der unteren Seite 18 auf. Zudem trifft ein Teil der Kugeln 14 unmittelbar auf den unteren Bereich einer Innenfläche 44 der Durchgangsöffnung 24 auf. Darüber hinaus wird der Randbereich 46 zwischen der Oberfläche 42 und der Innenfläche 44 der Durchgangsöffnung gleichmäßig oberflächengestrahlt, so dass der Randbereich 46 einerseits verfestigt und andererseits entsprechend - mit einem Radius versehen - abgerundet wird.The method to be carried out by means of the described device for ultrasonic shot peening of the component region 20 comprising the passage opening 24 is characterized in particular by the induction of an extremely homogeneous compressive residual stress profile or an extremely homogeneous solidification. Since the surface 12 of the vibration device 10 is arranged at a distance from the corresponding lower side 18, a part of the balls 14 accelerated by the surface 12 strikes a surface 42 of the lower side 18. In addition, part of the balls 14 impinge directly on the lower region of an inner surface 44 of the passage opening 24. In addition, the edge region 46 is uniformly surface-blasted between the surface 42 and the inner surface 44 of the passage opening, so that the edge region 46, on the one hand, solidifies and, on the other hand, is rounded off - provided with a radius.

Ein Teil der mittels der Oberfläche 12 der Vibrationseinrichtung 10 beschleunigten Kugeln 14 wird darüber hinaus mittels des Ablenkwerkzeugs 38 bzw. der Ablenkspitze 40 derart abgelenkt bzw. umgeleitet, dass die Kugeln 14 insbesondere in Richtung des oberen Bereichs der Innenfläche 44 der Durchgangsöffnung 24 gelangen. Somit wird durch das Ablenkwerkzeug 38 eine homogene Verfestigung bzw. ein homogenes Druckeigenspannungsprofil über die gesamte Innenfläche 44 der Durchgangsöffnung 24 erreicht.A portion of the balls 14 accelerated by means of the surface 12 of the vibration device 10 is also deflected or diverted by means of the deflection tool 38 or the deflection tip 40 in such a way that the balls 14 in particular reach the upper area of the inner surface 44 of the passage opening 24. Thus, a homogeneous hardening or a homogenous compressive residual stress profile over the entire inner surface 44 of the passage opening 24 is achieved by the deflection tool 38.

Ein weiterer Teil der durch die Oberfläche 12 der Vibrationseinrichtung 10 beschleunigten Kugeln 14 prallt an dem Gegenelement 28 ab, welches in einem Abstand zur korrespondierenden oberen Seite 26 des Bauteilbereichs 20 angeordnet wird. Eine der Durchgangsöffnung 24 zugewandte Innenseite 48 des Gegenelements 28 ist dabei nicht-planar, sondern vielmehr im vorliegenden Fall leicht kegelförmig bzw. schräg zulaufend ausgebildet. Hierdurch wird insbesondere erreicht, dass die auf die Innenseite 48 treffenden Kugeln schräg nach außen abgelenkt werden, so dass einerseits eine Oberfläche 50 der oberen Seite 26 des Bauteilbereichs 20 und andererseits insbesondere ein Randbereich 52 zwischen der Oberfläche 50 und der Innenfläche 44 der Durchgangsöffnung 24 verfestigt wird. Der Randbereich 52 zwischen der Oberfläche 50 und der Innenfläche 44 wird dabei gleichzeitig verfestigt und - mit einem Radius versehen - abgerundet. Als im Rahmen der Erfindung liegend ist es dabei zu betrachten, dass die Innenfläche 44 auch eine andere Gestalt, insbesondere eine abgerundete Form, aufweisen könnte.Another part of the balls 14 accelerated by the surface 12 of the vibration device 10 rebounds against the counter element 28, which is arranged at a distance from the corresponding upper side 26 of the component region 20. One of the through-opening 24 facing inside 48 of the counter-element 28 is non-planar, but rather slightly tapered or obliquely formed in the present case. In this way, it is achieved, in particular, that the balls striking the inner side 48 are deflected obliquely outwards so that, on the one hand, a surface 50 of the upper side 26 of the component region 20 and, on the other hand, in particular an edge region 52 between the surface 50 and the inner surface 44 of the through-hole 24 solidifies becomes. The edge region 52 between the surface 50 and the inner surface 44 is thereby simultaneously solidified and - provided with a radius - rounded. As lying within the scope of the invention, it should be considered that the inner surface 44 could also have a different shape, in particular a rounded shape.

Wie bereits erläutert, befinden sich sowohl das Gegenelement 28 wie auch die Vibrationseinrichtung 10 innerhalb der Strahlkammer 30, so dass die Menge an Strahlgut bzw. Stahlkugeln 14 auf einfache Weise gleichmäßig gehalten werden kann. Hierdurch wird ein besonders reproduzierbares Verfestigungsergebnis erreicht. Zwischen der Strahlkammer 30 und dem Bauteilbereich 20 können darüber hinaus entsprechende Dichtungselemente oder dergleichen vorgesehen sein, um einen unerwünschten Austritt von Strahlgut zu verhindern.As already explained, both the counter element 28 and the vibration device 10 are located within the blasting chamber 30, so that the amount of grit or steel balls 14 can be kept uniform in a simple manner. As a result, a particularly reproducible solidification result is achieved. In addition, corresponding sealing elements or the like may be provided between the blasting chamber 30 and the component region 20 in order to prevent an undesired escape of blasting material.

Durch die vorliegend horizontale Anordnung des Bauteilbereichs 20 und der Oberfläche 12 der Vibrationseinrichtung 10 wird zudem ein besonders reproduzierbares Strahlergebnis erzielt. Da die Vibrationseinrichtung 10 auf der unteren Seite 18 des Bauteilbereichs 20 angeordnet ist, gelangt das Strahlgut auf einfache Weise alleine aufgrund seiner Schwerkraft zur Vibrationseinrichtung 10 zurück.Due to the present horizontal arrangement of the component region 20 and the surface 12 of the vibration device 10 also a particularly reproducible beam result is achieved. Since the vibrating device 10 is arranged on the lower side 18 of the component region 20, the blasting material easily returns to the vibration device 10 solely on account of its gravitational force.

Insgesamt ist somit erkennbar, dass vorliegend ein Verfahren sowie eine Vorrichtung geschaffen sind, mittels welchen ein äußerst homogenes Druckeigenspannungsprofil in den Randschichten - vorliegend den Oberflächen 42 und 50, den Randbereichen 46 und 52, sowie der Innenfläche 44 der Durchgangsöffnung 24 - geschaffen werden kann. Dabei sorgt insbesondere das Gegenelement 28 dafür, dass durch die Durchgangsöffnung 24 nach oben austretende Stahlkugeln vorzugsweise auf den oberen Randbereich 52 gerichtet werden und zur Abrundung führen. Dieser Effekt wird auf der unteren Seite 18 am unteren Randbereich 46 von vornherein erhalten. Zur Verstärkung des Effekts an den Innenfläche 44 wird von oben her das Ablenkwerkzeug 38 gegen die Unterseite geführt, wodurch die homogene Verfestigung erreicht wird.Overall, it can thus be seen that in the present case a method and a device are provided by means of which an extremely homogeneous compressive residual stress profile in the surface layers - in the present case the surfaces 42 and 50, the edge regions 46 and 52, and the inner surface 44 of the through hole 24 - can be created. In particular, the counter element 28 ensures that through the through hole 24 upwardly emerging steel balls are preferably directed to the upper edge portion 52 and lead to rounding. This effect is obtained on the lower side 18 at the lower edge portion 46 from the outset. To enhance the effect on the inner surface 44, the deflection tool 38 is guided from above, against the underside, whereby the homogeneous solidification is achieved.

In Figur 2 ist die Tiefenverteilung der Verfestigung bzw. des Druckeigenspannungsprofils in den verfestigten Randschichten bzw. Oberflächen des Bauteils insbesondere im Bereich der Durchgangsöffnung in einem schematischen Diagramm erkennbar, wobei auf der Ordinate die Spannung und auf der Abszisse die Abtragtiefe abgetragen ist. Dabei wird insbesondere die homogene Verfestigung der entsprechenden Bauteile erkennbar.In FIG. 2 the depth distribution of the solidification or the compressive residual stress profile in the solidified edge layers or surfaces of the component, in particular in the region of the passage opening in a schematic diagram recognizable, wherein the ordinate the voltage and the abscissa is removed, the removal depth. In particular, the homogeneous solidification of the corresponding components can be seen.

Claims (6)

  1. Method for the surface-peening, in particular the ultrasonic shot-peening, of a component (22) in the region of a passage opening (24), in which a vibration device (10) acting upon the peening material (spheres 14) is arranged on one side (18) and a counter-element (28) is arranged on an opposite side (26) relative to a component region (20) that has the passage opening (24), and in which the counter-element (28) is arranged at a distance relative to the corresponding side (26) of the component region (20), and spheres (14) are moved from out of the passage opening (24) as far as the counter-element (28), characterised in that a deflecting tool (38), which is dimensioned so as to be smaller in cross-section than the passage opening (24), is arranged in the passage opening (24), which deflecting tool (38) is arranged, relative to the component region (20) that has the passage opening (24), from the side of the counter-element (28) and also jointly with the counter-element (28).
  2. Method according to claim 1, characterised in that a counter-element (28) is used that has a non-planar inner side (48) which faces the passage opening (24) and by means of which an edge region (52) between a surface (50) of the component region (20) and an inner face (44) of the passage opening (24) is peened.
  3. Method according to claim 1 or 2, characterised in that the deflecting tool (38) that is dimensioned so as to be smaller in cross-section than the passage opening (24) is arranged in a central region of the passage opening (24) over a partial length of the passage opening (24) inside the latter.
  4. Method according to one of claims 1 to 3, characterised in that a surface (12) of the vibration device (10) acting upon the peening material is arranged at a distance from the corresponding side (18) of the component region (20).
  5. Method according to one of claims 1 to 4, characterised in that the component region (20) that has the passage opening (24) is arranged substantially horizontally and the vibration device (10) is arranged underneath the component region (20).
  6. Method according to one of claims 1 to 5, characterised in that the component region (20) that has the passage opening (24) is positioned inside a peening chamber (30) in which the vibration device (10) and the counter-element (28) are arranged.
EP08773264A 2007-06-26 2008-06-06 Method and device for surface peening of a component in the region of a passage opening Not-in-force EP2164679B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007029491A DE102007029491A1 (en) 2007-06-26 2007-06-26 Method and device for surface blasting of a component in the region of a passage opening
PCT/DE2008/000968 WO2009000232A1 (en) 2007-06-26 2008-06-06 Method and device for surface peening of a component in the region of a passage opening

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EP2164679B1 true EP2164679B1 (en) 2012-03-28

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EP (1) EP2164679B1 (en)
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US20110146361A1 (en) * 2009-12-22 2011-06-23 Edwards Lifesciences Corporation Method of Peening Metal Heart Valve Stents
US9670561B2 (en) * 2014-04-11 2017-06-06 City University Of Hong Kong Apparatus and a method for surface processing a metallic structure
CN109848867A (en) * 2019-03-28 2019-06-07 杭州电子科技大学 A kind of flow shooting and polishing device of band vibration flexible nozzle
CN111705196B (en) * 2020-05-29 2021-07-20 江苏大学 Device capable of realizing double-sided machining through one-time shot blasting
CN114011958B (en) * 2021-11-18 2023-08-04 中国航空制造技术研究院 Shot blasting forming method for prolonging fatigue life of ribbed integral wallboard

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US3695091A (en) * 1970-09-28 1972-10-03 Metal Improvement Co Method of and apparatus for measuring intensity of peening in small diameter holes
SU1009735A1 (en) 1981-01-29 1983-04-07 Куйбышевский политехнический институт им.В.В.Куйбышева Ultrasonic device for surface strengthening by balls
FR2714629B1 (en) * 1993-12-30 1996-06-07 Teknoson Sa Method and device for deburring mechanical parts.
RU2139785C1 (en) 1997-10-22 1999-10-20 Казаков Владимир Михайлович Device for surface hardening of "spider" parts
US6189356B1 (en) 2000-02-17 2001-02-20 General Electric Company Method and apparatus for peening
FR2814099B1 (en) * 2000-09-21 2002-12-20 Snecma Moteurs CROSS-SECTIONAL SENSING BY ULTRASSONS OF BLADES ON A ROTOR
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 (en) 2004-08-05 2006-03-16 Mtu Aero Engines Gmbh Device for surface blasting of components
DE102004059592B4 (en) 2004-12-10 2014-09-04 MTU Aero Engines AG Method for surface blasting of cavities, in particular of cavities on gas turbines

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US8650920B2 (en) 2014-02-18
ATE551154T1 (en) 2012-04-15
WO2009000232A1 (en) 2008-12-31
DE102007029491A1 (en) 2009-01-02
US20100186472A1 (en) 2010-07-29
EP2164679A1 (en) 2010-03-24
CA2692979C (en) 2015-02-17
CA2692979A1 (en) 2008-12-31

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