EP1986817B1 - Peening chamber for surface peening, in particular for ultrasonic shot peening of gas turbine components - Google Patents
Peening chamber for surface peening, in particular for ultrasonic shot peening of gas turbine components Download PDFInfo
- Publication number
- EP1986817B1 EP1986817B1 EP07702443A EP07702443A EP1986817B1 EP 1986817 B1 EP1986817 B1 EP 1986817B1 EP 07702443 A EP07702443 A EP 07702443A EP 07702443 A EP07702443 A EP 07702443A EP 1986817 B1 EP1986817 B1 EP 1986817B1
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- EP
- European Patent Office
- Prior art keywords
- chamber
- peening
- wall
- region
- blasting
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- 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.)
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- 238000005480 shot peening Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 2
- 230000001133 acceleration Effects 0.000 claims 1
- 238000005422 blasting Methods 0.000 description 72
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/005—Vibratory devices, e.g. for generating abrasive blasts by ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/08—Devices for generating abrasive blasts non-mechanically, e.g. of metallic abrasives by means of a magnetic field or by detonating cords
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- 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 blasting chamber for surface blasting, in particular for ultrasonic shot peening of gas turbine components, specified in the preamble of claim 1.
- shot peening it is possible, for example, to consolidate components or component areas of gas turbines which are subject to high stress by frictional wear or the like. It is also possible by means of this special surface treatment method to minimize or largely eliminate distortion, material misalignments or other defects, for example at edges of rotor or blade areas. Finally, it is possible by shot peening to post treat butt joints of repaired turbine blades or the like components.
- the plurality of turbine blades are to be positioned upside-down within a receiving frame in such a way that they protrude with their blade tip surrounding the respective surface to be machined through an associated wall opening within the frame.
- the frame itself forms a horizontally extending upper wall portion of the blasting chamber, which is parallel to a forming a lower wall portion of the blasting chamber, horizontally extending vibration plate of a sonotrode.
- the frame is to be determined within an associated frame opening such that the blade tips comprising the surfaces to be processed are arranged within the steel chamber.
- a blasting chamber in which a blade root of a gas turbine blade can be treated by an ultrasonic shot peening process.
- a through opening is introduced within a vertically extending wall region of the blasting chamber through which the gas turbine blade is to be inserted.
- a horizontally running lower wall area the generally substantially cube-shaped blasting chamber is formed by a surface of a sonotrode, which is to be excited by ultrasonic vibrations. The steel balls arranged within the blasting chamber are thereby accelerated for machining the blade root.
- jet chambers are tuned very specifically to an application or the processing of a particular component.
- the jet chambers are matched in their geometry to the component to be machined or the component area to be machined so that a desired
- wall openings are provided in the respective wall region of the chamber wall or the receiving frame, which are specifically adapted to the cross section of the component to be machined.
- document FR 2689431 shows a blasting chamber according to the preamble of claim 1.
- Object of the present invention is therefore to improve a blasting chamber of the type mentioned, which can be adapted with little effort to different components to be machined.
- At least one wall region of the chamber wall is designed to be adjustable in order to change its geometry.
- the invention is based on the basic idea that the geometry-that is to say, for example, the size and / or the shape-of the blasting chamber can be adapted or approximated to the component to be machined by designing at least one wall region of the chamber wall to be adjustable.
- the at least one wall region of the chamber wall for example, the distances and angles are affected to which the blasting agent - for example, the Balls during ultrasonic shot peening - to be deflected.
- a universally usable blasting chamber can thus be created, which can be adapted and / or approximated automatically to different contours or components with very little setup effort.
- the wall regions of the chamber wall to be adjusted can be linearly displaced or adjusted at an angle, depending on which geometry of the blasting chamber is optimal for the particular component to be machined.
- an adjustment of the geometry of the blasting chamber has been found to be easy to carry out, in which the at least one wall region of the chamber wall is to be changed by inflation.
- the at least one wall region of the chamber wall is to be changed by inflation.
- the adjustable wall area is supported on an inflatable cushion and can be adjusted accordingly.
- a gaseous medium it would of course also be conceivable to adjust the variable wall region of the chamber wall, for example by a liquid medium such as oil or the like.
- the chamber wall of the blasting chamber of a flexible yielding material and in particular of a rubber material.
- the side facing the component area must be designed to be stable on the chamber wall, for example, to withstand the loads imposed by the balls during ultrasonic shot peening.
- the chamber wall may need to be correspondingly stiff, so that, for example, the balls are deflected in the desired manner on the chamber wall.
- the chamber wall is at least locally provided with a cover, casing or the like on its side facing the component area to be processed.
- the inventively provided adjustable wall portion of the chamber wall may also be provided only in the region of the wall opening, through which a part of the surface to be machined comprehensive is passed.
- the wall opening is thus adjustable and easily adaptable to varying sizes and geometries of different components to be machined.
- a sliding element is provided in the contact area of the seal with the component passed through the wall opening, then it is possible in a simple manner to move the component during the surface blasting within the blasting chamber, for example to rotate in order to achieve the best possible surface of the component ,
- the surface of the sonotrode forms a wall region of the chamber wall.
- a device for determining the acoustic emission of the blasting medium is arranged within the blasting chamber, then a loss of blasting medium-by the associated change in the sound emission-can be determined in a simple manner in this way.
- a particularly advantageous blasting chamber can be achieved in that the device for replenishing is connected to the device for determining the acoustic emission of the blasting material. If, accordingly, a loss of blasting agent is detected by means of the device for determining the sound emission, then this loss can be compensated in a simple manner by the device for replenishment in order to ensure a uniform and reproducible blasting result.
- FIG. 1 in a schematic sectional view of a blasting chamber for surface blasting is shown, which is here in particular for ultrasonic shot peening of gas turbine components in the form of engine blades 10 is formed.
- the blasting chamber has, for example, a substantially cube-shaped geometry, which is essentially delimited by a chamber wall 12.
- the blasting chamber is partially bounded by a surface 14 of an ultrasonic sonotrode 16, which via an ultrasonic vibration unit, not shown -
- an ultrasonic piezoelectric actuator comprises - is to put into vibration.
- the ultrasonic sonotrode 16 is operated by way of example with a frequency of greater than 20 kHz and an amplitude in the range of about 30 to 60 ⁇ m. Of course, the operation of the ultrasonic sonotrode 16 is not limited to the specified frequency or amplitude range.
- a wall opening 18 is provided, through which the engine blade 10 is passed with a component region 20 comprising the surface to be machined or disposed within the blasting chamber.
- the component region 20 arranged within the blasting chamber is the blade of the turbine blade 10, while the blade root 22 is arranged outside the blasting chamber.
- jet turbine blades 10 or other gas turbine components with different shapes or dimensions within the blasting chamber, their geometry can be changed.
- variability of the geometry is to be understood that, for example, individual wall areas are to be adjusted in a manner to be described in more detail below, so that the size and / or shape of the blasting chamber vary and thus can be optimally adapted to the gas turbine component to be machined ,
- FIG. 1 So is for example in FIG. 1 at the wall opening 18 facing away from the vertical outer side 24 of the chamber wall 12 a dashed line indicated wall portion 26 can be seen, which can be adjusted linearly in the horizontal direction. This makes it possible, for example, to move the turbine blade 10 opposite the vertical wall region 26 closer to the component area 20 to be machined or away from it.
- the movement or adjustment of the wall region 26 takes place in the present exemplary embodiment by means of a compressed air source 28 and a supply line 30, via which a pillow-shaped element 32 carrying the wall region 26 can be inflated. It is clear that when the wall region 26 is driven back, the compressed air can be correspondingly drained or sucked off.
- the wall region 26 may be formed, for example, by a plate-shaped element, which is supported on the cushion-shaped element 32.
- element 32 consists of a flexibly compliant material, in particular of a rubber material, which naturally has to withstand the mechanical and thermal stresses within the blasting chamber.
- a flexibly compliant material in particular of a rubber material, which naturally has to withstand the mechanical and thermal stresses within the blasting chamber.
- a further wall portion 36 of the chamber wall 12 is exemplified, which can be adjusted in its angular adjustment.
- a pillow-shaped element 38 positioned behind the wall region 36 is connected to the compressed-air source 28 via a feed line 40.
- the chamber wall 12 is to be varied over a supply line 46 in total in size. If, on the other hand, the chamber wall 12 is subdivided into a plurality of cushion chambers, then the chamber wall 12 can be varied not only in its size but also in its geometry in that the individual cushion chambers are filled to varying degrees with compressed air from the compressed air reservoir 28.
- the chamber wall 12 may be provided on its inner side which limits the blasting chamber with linings or coatings in order to be able to withstand the thermal and mechanical stresses produced by the balls 42 during ultrasonic shot peening.
- FIG. 2 which shows in a schematic side view of the blasting chamber limiting comb wall 12, the passage of the component portion 20 of the along the line II - II in FIG. 1 cut indicated turbine blade 10 closer recognizable.
- the adjacent to the wall opening 18 circumferential Wall area 48 ( FIG. 2 ) is also adjustable.
- the wall portion 48 is formed as a pillow-shaped element, by the adjustment of the size or geometry of the wall opening 18 can be varied.
- the wall portion 48 is again made of a flexible yielding material, in particular a rubber material.
- the wall region 48 forms a schematically indicated seal 50 with respect to the driven active blade 10 passed through the wall opening 18, with which the outlet of balls 42 located within the blasting chamber can be avoided.
- the adjustable wall region 48 in the contact region of the seal 50 comprises a likewise schematically indicated circulating sliding element 52 with which, for example, a displacement or rotation of the turbine blade 10 within the wall opening 18 is possible.
- the wall opening 18 is preferably initially set so that it is designed to be larger than the clear cross section of the turbine blade 10. After this is positioned within the blasting chamber, the wall portion 28 is inflated so far so far to wipe the turbine blade 10 and the chamber wall 12 enters the desired seal against the escape of balls 42.
- the inflation of the pillow-shaped wall region 48 takes place via a supply line 56 fed by a compressed air source 54.
- adjustable wall portions 26, 36 and 48 can be provided separately as well as together within the blasting chamber. It is also conceivable to combine a combination of a chamber wall 12 to be filled with air in general - according to lines 44 - with a wall region 26, 36 and 48 to be filled separately.
- a device 48 for determining the sound emission is arranged inside the blasting chamber. Accordingly, if a loss of balls 42 is detected, the means 58 is connected via a conduit 60 to a means 62 for post-dosing within the blasting chamber Balls 42 connected.
- the optionally required refilling of balls 42 by means of the device 62 ensures that sets a constant amount of balls 42 and the like blasting agent is disposed within the blasting chamber, so that achieves an extremely consistent and easily reproducible surface finish even with a variety of turbine blades 10 can be.
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Abstract
Description
Die Erfindung betrifft eine Strahlkammer zum Oberflächenstrahlen, insbesondere zum Ultraschall-Kugelstrahlen von Gasturbinen-Bauteilen, der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a blasting chamber for surface blasting, in particular for ultrasonic shot peening of gas turbine components, specified in the preamble of claim 1. Art.
Eine derartige Strahlkammer ist bereits aus der
Durch ein derartiges Kugelstrahlen ist es beispielsweise möglich, durch Reibverschleiß oder dergleichen stark beanspruchte Bauteile oder Bauteilbereiche von Gasturbinen zu verfestigen. Ebenso ist es durch dieses spezielle Oberflächenbearbeitungsverfahren möglich, Verzüge, Materialverfrachtungen oder andere Defekte, beispielsweise an Kanten von Rotoren- oder Schaufelbereichen zu minimieren bzw. weitestgehend zu eliminieren. Schließlich ist es durch das Kugelstrahlen möglich, Stoßfugen von reparierten Turbinenschaufeln oder dergleichen Bauteilen nachzubehandeln.By means of such shot peening, it is possible, for example, to consolidate components or component areas of gas turbines which are subject to high stress by frictional wear or the like. It is also possible by means of this special surface treatment method to minimize or largely eliminate distortion, material misalignments or other defects, for example at edges of rotor or blade areas. Finally, it is possible by shot peening to post treat butt joints of repaired turbine blades or the like components.
Bei der bekannten Strahlkammer sind hierbei die Mehrzahl von Turbinenschaufeln kopfüber innerhalb eines Aufnahmerahmens so zu positionieren, dass diese mit ihrer die jeweils zu bearbeitende Oberfläche umfassenden Schaufeispitze durch eine zugehörige Wandöffnung innerhalb des Rahmens hindurchragen. Der Rahmen selbst bildet dabei einen horizontal verlaufenden oberen Wandbereich der Strahlkammer, der einer den unteren Wandbereich der Strahlkammer bildenden, horizontal verlaufenden Schwingungsplatte einer Sonotrode parallel gegenüberliegt. Dabei ist der Rahmen innerhalb einer zugehörigen Rahmenöffnung derart festzulegen, dass die die zu bearbeitenden Oberflächen umfassenden Schaufelspitzen innerhalb der Stahlkammer angeordnet sind. Durch die mit einer Ultraschallschwingung angeregte Sonotrode kann nunmehr innerhalb der Strahlkammer ein Kugelnbel erzeugt werden, mit dem die Schaufelspitzen der Turbinenschaufeln oberflächenbehandelt werden.In the case of the known blasting chamber, in this case the plurality of turbine blades are to be positioned upside-down within a receiving frame in such a way that they protrude with their blade tip surrounding the respective surface to be machined through an associated wall opening within the frame. The frame itself forms a horizontally extending upper wall portion of the blasting chamber, which is parallel to a forming a lower wall portion of the blasting chamber, horizontally extending vibration plate of a sonotrode. In this case, the frame is to be determined within an associated frame opening such that the blade tips comprising the surfaces to be processed are arranged within the steel chamber. By means of the sonotrode excited by means of an ultrasonic oscillation, it is now possible within the blasting chamber to produce a spherical blast with which the blade tips of the turbine blades are surface-treated.
Darüber hinaus ist aus der
Nachteilig bei diesen bekannten Strahlkammern ist jeweils der Umstand anzusehen, dass diese ganz spezifisch auf einen Anwendungsfall bzw. die Bearbeitung eines bestimmten Bauteils abgestimmt sind. So sind die Strahlkammern in ihrer Geometrie derart auf das zu bearbeitende Bauteil bzw. den zu bearbeitenden Bauteilbereich abgestimmt, dass sich eine erwünschteA disadvantage of these known jet chambers is in each case the fact that they are tuned very specifically to an application or the processing of a particular component. Thus, the jet chambers are matched in their geometry to the component to be machined or the component area to be machined so that a desired
Qualität der bearbeiteten Oberfläche realisieren lässt. Darüber hinaus sind im jeweiligen Wandbereich der Kammerwand bzw. des Aufnahmerahmens Wandöffnungen vorgesehen, die spezifisch an den Querschnitt des zu bearbeitenden Bauteils angepasst sind.Quality of the machined surface can be realized. In addition, wall openings are provided in the respective wall region of the chamber wall or the receiving frame, which are specifically adapted to the cross section of the component to be machined.
Dokument
Aufgabe der vorliegenden Erfindung ist es daher, eine Strahlkammer der eingangs genannten Art zu verbessern, die mit geringem Aufwand auf unterschiedliche zu bearbeitende Bauteile angepasst werden kann.Object of the present invention is therefore to improve a blasting chamber of the type mentioned, which can be adapted with little effort to different components to be machined.
Diese Aufgabe wird erfindungsgemäß durch eine Strahlkammer mit den Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen und nicht-trivialen Weiterbildungen der Erfindung sind in den übrigen Patentansprüchen beschrieben.This object is achieved by a blasting chamber with the features of claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are described in the remaining claims.
Bei der Strahlkammer nach der Erfindung ist zur Veränderung von deren Geometrie zumindest ein Wandbereich der Kammerwand verstellbar ausgebildet. Mit anderen Worten ist die Erfindung von dem Grundgedanken getragen, dass die Geometrie - also beispielsweise die Größe und/oder die Form - der Strahlkammer dadurch an das zu bearbeitende Bauteil angepasst bzw. angenähert werden kann, dass zumindest ein Wandbereich der Kammerwand verstellbar ausgebildet ist. Hierdurch ist es nicht nur möglich, die Strahlkammer auf unterschiedliche Größen der zu bearbeitenden Bauteile anzupassen bzw. anzunähern, sondern vielmehr können durch die geeignete Verstellung des wenigstens einen Wandbereichs der Kammerwand beispielsweise auch die Distanzen und Winkel beeinflusst werden, an welchen das Strahlmittel - beispielsweise die Kugeln beim Ultraschall-Kugelstrahlen - abgelenkt werden.In the blasting chamber according to the invention, at least one wall region of the chamber wall is designed to be adjustable in order to change its geometry. In other words, the invention is based on the basic idea that the geometry-that is to say, for example, the size and / or the shape-of the blasting chamber can be adapted or approximated to the component to be machined by designing at least one wall region of the chamber wall to be adjustable. As a result, it is not only possible to adapt or approximate the blasting chamber to different sizes of the components to be machined, but rather by the appropriate adjustment of the at least one wall region of the chamber wall, for example, the distances and angles are affected to which the blasting agent - for example, the Balls during ultrasonic shot peening - to be deflected.
Im Ergebnis kann somit eine universell einsetzbare Strahlkammer geschaffen werden, die sich automatisch und mit äußerst geringem Rüstaufwand an unterschiedliche Konturen bzw. Bauteile anpassen bzw. annähern lässt. Somit ist es auf einfach Weise möglich, in ihrer Form und Größe unterschiedliche Bauteile innerhalb ein und derselben Strahlkammer zu bearbeiten.As a result, a universally usable blasting chamber can thus be created, which can be adapted and / or approximated automatically to different contours or components with very little setup effort. Thus, it is possible in a simple manner, different in their shape and size To process components within one and the same blasting chamber.
Die zu verstellenden Wandbereiche der Kammerwand können dabei linear verschoben oder im Winkel verstellt werden, je nachdem, welche Geometrie der Strahlkammer für das jeweils zu bearbeitende Bauteil optimal ist.The wall regions of the chamber wall to be adjusted can be linearly displaced or adjusted at an angle, depending on which geometry of the blasting chamber is optimal for the particular component to be machined.
In weiterer Ausgestaltung der Erfindung hat sich insbesondere eine Verstellung der Geometrie der Strahlkammer als einfach durchführbar gezeigt, bei welcher der zumindest eine Wandbereich der Kammerwand durch Aufblasen zu verändern ist. Somit ergibt sich die Möglichkeit, durch einfaches zuführen bzw. Absaugen eines gasförmigen Mediums die Kontur der entsprechenden Kammerwand zu verändern. Der verstellbare Wandbereich ist auf einem aufblasbaren Kissen abgestützt ist und kann dementsprechend verstellt werden. Anstelle eines gasförmigen Mediums wäre es selbstverständlich auch denkbar, den veränderbaren Wandbereich der Kammerwand beispielsweise durch ein flüssiges Medium wie Öl oder dergleichen zu verstellen.In a further embodiment of the invention, in particular an adjustment of the geometry of the blasting chamber has been found to be easy to carry out, in which the at least one wall region of the chamber wall is to be changed by inflation. Thus, there is the possibility to change the contour of the corresponding chamber wall by simply feeding or sucking off a gaseous medium. The adjustable wall area is supported on an inflatable cushion and can be adjusted accordingly. Instead of a gaseous medium, it would of course also be conceivable to adjust the variable wall region of the chamber wall, for example by a liquid medium such as oil or the like.
In weiterer Ausgestaltung der Erfindung ist es darüber hinaus denkbar, die Kammerwand der Strahlkammer aus einem flexibel nachgiebigen Material und insbesondere aus einem Gummimaterial zu gestalten. Es ist klar, dass die dem Bauteilbereich zugewandte Seite an der Kammerwand entsprechend stabil ausgestaltet sein muss, um beispielsweise den Belastungen durch die Kugeln beim Ultraschall-Kugelstrahlen stand zu halten. Weiterhin ist es klar, dass die Kammerwand gegebenenfalls entsprechend steif ausgebildet sein muss, damit beispielsweise die Kugeln in der gewünschten Weise an der Kammerwand abgelenkt werden. In diesem Zusammenhang ist es beispielsweise möglich, dass die Kammerwand auf ihrer dem zu bearbeitenden Bauteilbereich zugewandten Seite mit einer Abdeckung, Verschalung oder dergleichen zumindest lokal versehen ist.In a further embodiment of the invention, it is also conceivable to make the chamber wall of the blasting chamber of a flexible yielding material and in particular of a rubber material. It is clear that the side facing the component area must be designed to be stable on the chamber wall, for example, to withstand the loads imposed by the balls during ultrasonic shot peening. Furthermore, it is clear that the chamber wall may need to be correspondingly stiff, so that, for example, the balls are deflected in the desired manner on the chamber wall. In this context, it is possible, for example, that the chamber wall is at least locally provided with a cover, casing or the like on its side facing the component area to be processed.
Um verschiedene Bauteile, welche lediglich mit einem die zu bearbeitende Oberfläche umfassenden Bauteilbereich innerhalb der Kammerwand bzw. der Strahlkammer angeordnet sind, mittels einer einzigen Strahlkammer bearbeiten zu können, hat es sich in weiterer Ausgestaltung der Erfindung.als besonders vorteilhaft gezeigt, den an die Wandöffnung angrenzenden Wandbereich der Kammerwand verstellbar auszubilden. Mit anderen Worten kann der erfindungsgemäß vorgesehene verstellbare Wandbereich der Kammerwand auch lediglich in dem Bereich der Wandöffnung vorgesehen sein, durch welche ein die zu bearbeitende Oberfläche umfassender Bauteilbereich hindurchgeführt ist. In diesem Zusammenhang ist es denkbar, dass lediglich ein Teil des die Wandöffnung umgebenden Wandbereichs oder aber der komplette umlaufende Wandbereich verstellbar ist. Im Ergebnis ist somit die Wandöffnung verstellbar und in einfacher Weise an variierende Größen und Geometrien von unterschiedlichen, zu bearbeitenden Bauteilen anpassbar. Hierdurch iässt sich nicht nur eine universell einsetzbare Strahlkammer erreichen, sondern darüber hinaus lassen sich auch die Rüstzeiten beim Umstellen auf eine andere Bauteilgeometrie auf ein Minimum reduzieren.In order to be able to process various components, which are arranged only with a comprehensive surface to be machined component within the chamber wall or the blasting chamber by means of a single blasting chamber, it has shown in a further embodiment of the invention.also particularly advantageous to the wall opening adjacently form adjacent wall region of the chamber wall. In other words, the inventively provided adjustable wall portion of the chamber wall may also be provided only in the region of the wall opening, through which a part of the surface to be machined comprehensive is passed. In this context, it is conceivable that only a part of the wall area surrounding the wall opening or else the complete peripheral wall area is adjustable. As a result, the wall opening is thus adjustable and easily adaptable to varying sizes and geometries of different components to be machined. As a result, not only can a universally usable blasting chamber be achieved, but, moreover, set-up times when changing over to another component geometry can be reduced to a minimum.
Damit zwischen der Wandöffnung und dem hindurchgeführten Bauteil kein Strahlmittel entweichen kann, hat es sich in weiterer Ausgestaltung der Erfindung als vorteilhaft gezeigt, den an die Wandöffnung angrenzenden Wandbereich der Kammerwand als Dichtung auszubilden. Neben der Vermeidung eines Verlustes an Strahlmittel kann somit auch erreicht werden, dass die zu bearbeitende Oberfläche genau definiert bzw. der zu bearbeitende Bauteilbereich von dem nicht zu bearbeitenden Bauteilbereich sehr genau unterteilt werden kann.So that no blasting agent can escape between the wall opening and the component passed through, it has been shown to be advantageous in a further embodiment of the invention to form the adjoining the wall opening wall portion of the chamber wall as a seal. In addition to avoiding a loss of blasting agent, it can thus also be achieved that the surface to be machined can be precisely defined or the component area to be machined can be subdivided very precisely from the component area not to be machined.
Ist darüber hinaus im Kontaktbereich der Dichtung mit dem durch die Wandöffnung hindurchgeführten Bauteil ein Gleitelement vorgesehen, so ist es auf einfache Weise möglich, das Bauteil während des Oberflächenstrahlens innerhalb der Strahlkammer zu bewegen, beispielsweise zu drehen, um eine möglichst optimale Oberfläche des Bauteils zu erreichen.If, in addition, a sliding element is provided in the contact area of the seal with the component passed through the wall opening, then it is possible in a simple manner to move the component during the surface blasting within the blasting chamber, for example to rotate in order to achieve the best possible surface of the component ,
Um insbesondere beim Kugelstrahlen ein besonders gutes Oberflächenergebnis zu erreichen, hat es sich als weiterhin vorteilhaft gezeigt, eine Ultraschall-Sonotrode, insbesondere innerhalb der. Strahlkammer, vorzusehen bzw. anzuordnen. In einer besonders bevorzugten Ausführungsform bildet dabei die Oberfläche der Sonotrode einen Wandbereich der Kammerwand.In order to achieve a particularly good surface finish, in particular during shot peening, it has also proven to be advantageous to use an ultrasonic sonotrode, in particular within the. Blasting chamber to provide or arrange. In a particularly preferred embodiment, the surface of the sonotrode forms a wall region of the chamber wall.
In zu bevorzugender Ausgestaltung ist der zumindest eine, zur Veränderung der Geometrie der Strahlkammer verstellbare Wandbereich von der Ultraschall-Sonotrode verschieden, und zwar insbesondere auch dann, wenn eine Oberfläche der Sonotrode einen Wandbereich der Kammerwand ausbildet.In a preferred embodiment, the at least one, adjustable to change the geometry of the blasting chamber wall portion of the ultrasonic sonotrode different, and in particular even if a surface of the sonotrode forms a wall portion of the chamber wall.
Ist innerhalb der Strahlkammer eine Einrichtung zur Ermittlung der Schallemission des Strahlmittels angeordnet, so kann auf diesem Weg auf einfache Weise ein Verlust an Strahlmittels - durch die damit einhergehende Veränderung der Schallemission - ermittelt werden.If a device for determining the acoustic emission of the blasting medium is arranged within the blasting chamber, then a loss of blasting medium-by the associated change in the sound emission-can be determined in a simple manner in this way.
Darüber hinaus hat es sich als weiter vorteilhaft gezeigt, der Strahlkammer eine Einrichtung zum Nachdosieren des sich innerhalb der Strahlkammer befindenden Strahlmittels zuzuordnen. Hierdurch ist es möglich, die Menge des Strahlmittels innerhalb der Strahlkammer konstant zu halten und dementsprechend ein reproduzierbares und sehr konstantes Strahlenergebnis zu erreichen.Moreover, it has proved to be further advantageous to associate with the blasting chamber a device for re-metering the blasting medium located inside the blasting chamber. This makes it possible to keep the amount of blasting agent within the blasting chamber constant and accordingly to achieve a reproducible and very constant beam result.
Schließlich kann eine besonders vorteilhafte Strahlkammer dadurch erreicht werden, dass die Einrichtung zum Nachdosieren mit der Einrichtung zur Ermittlung der Schallemission des Strahlguts verbunden ist. Wird demgemäß ein Verlust von Strahlmittel mittels der Einrichtung zur Ermittlung der Schallemission detektiert, so kann dieser Verlust auf einfache Weise durch die Einrichtung zum Nachdosieren ausgeglichen werden, um ein einheitliches und reproduzierbares Strahlergebnis zu gewährleisten.Finally, a particularly advantageous blasting chamber can be achieved in that the device for replenishing is connected to the device for determining the acoustic emission of the blasting material. If, accordingly, a loss of blasting agent is detected by means of the device for determining the sound emission, then this loss can be compensated in a simple manner by the device for replenishment in order to ensure a uniform and reproducible blasting result.
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 die erfindungsgemäße Strahlkammer zum Oberflächenstrahlen, welche eine Wandöffnung innerhalb ihrer Kammerwand umfasst, durch welche ein Bauteilbe- reich einer Turbinenschaufel hindurchgeführt und innerhalb der Strahlkammer positioniert ist, wobei zur Veränderung der Geo- metrie der Strahlkammer beispielhaft mehrere Wandbereiche der Kammerwand der Strahlkammer verstellbar ausgebildet sind; und in
- Figur 2
- eine schematische Seitenansicht auf die Strahlkammer gemäß Fi- gur 1 im Bereich der Hindurchführung der Turbinenschaufel durch die Wandöffnung innerhalb der Kammerwand, wobei die Turbinen- schaufel in Schnittansicht entlang der Linie II - II in
Figur 1 schematisch dargestellt ist.
- FIG. 1
- a schematic sectional view through the blasting chamber according to the invention for surface blasting, which includes a wall opening within its chamber wall through which a component portion of a turbine blade passed and positioned within the blasting chamber, wherein for changing the geometry of the blasting chamber example, several wall portions of the chamber wall of the blasting chamber are designed adjustable; and in
- FIG. 2
- a schematic side view of the blasting chamber according to Figure 1 in the region of the passage of the turbine blade through the wall opening within the chamber wall, wherein the turbine blade in a sectional view along the line II - II in
FIG. 1 is shown schematically.
In
Innerhalb der Kammerwand 12 ist eine Wandöffnung 18 vorgesehen, durch welche die Triebwerksschaufel 10 mit einem die zu bearbeitende Oberfläche umfassenden Bauteilbereich 20 hindurchgeführt bzw. innerhalb der Strahlkammer angeordnet ist. Der innerhalb der Strahlkammer angeordnete Bauteilbereich 20 ist im vorliegenden Fall das Schaufelblatt der Turbinenschaufel 10, während der Schaufelfuß 22 außerhalb der Strahlkammer angeordnet ist.Within the
Um nun Turbinenschaufeln 10 oder andere Gasturbinen-Bauteile mit unterschiedlichen Formen bzw. Abmessungen innerhalb der Strahlkammer Oberflächenstrahlen zu können, ist deren Geometrie veränderbar. Unter Veränderbarkeit der Geometrie ist dabei zu verstehen, dass beispielsweise einzelne Wandbereiche auf im Weiteren noch näher beschriebene Weise zu verstellen sind, so dass sich die Größe und/oder Form der Strahlkammer variieren und somit in optimaler Weise an das zu bearbeitende Gasturbinen-Bauteil anpassen lässt.In order to be able to now
So ist zum Beispiel in
Der Wandbereich 26 bzw. das kissenförmige Element 32 bestehen hierzu aus einem flexibel nachgiebigen Material, insbesondere aus einem Gummimaterial, welches natürlich den mechanischen und thermischen Belastungen innerhalb der Strahlkammer standhalten muss. In diesem Zusammenhang ist es beispielsweise denkbar, das kissenförmige Element 32 bzw. den Wandbereich 26 mit einer Beschichtung oder Abdeckung zu versehen, um insbesondere die erforderlichen mechanischen und thermischen Qualitätseigenschaften bereitstellen zu können.The
An der der Ultraschall-Sonotrode 16 gegenüberliegenden horizontalen Oberseite 34 ist ein weiterer Wandbereich 36 der Kammerwand 12 beispielhaft dargestellt, der in seiner Winkeleinstellung verstellt werden kann. Hierzu ist wiederum ein hinter dem Wandbereich 36 positioniertes kissenförmiges Element 38 über eine Zuführungsleitung 40 mit der Druckluftquelle 28 verbunden. Durch die Verstellung des Winkels des Wandbereichs 36 ist es insbesondere möglich, das Strahlmittel beispielsweise Kugeln 42 beim Ultraschall-Kugelstrahlen in einem entsprechenden Winkel abzulenken und auf den zu bearbeitenden Bauteilbereich 20 der Turbinenschaufel 10 zu richten.At the
Im vorliegenden Ausführungsbeispiel ist die Kammerwand 12 über eine Zuführungsleitung 46 insgesamt in ihrer Größe zu variieren. Ist die Kammerwand 12 hingegen in mehrere Kissenkammern unterteil, so kann die Kammerwand 12 nicht nur in ihrer Größe, sondern vielmehr auch in ihrer Geometrie dadurch variiert werden, dass die einzelnen Kissenkammern unterschiedlich stark mit Druckluft aus dem Druckluftspeicher 28 befüllt werden. Die Kammerwand 12 kann dabei auf ihrer die Strahlkammer begrenzenden Innenseite mit Auskleidungen oder Beschichtungen versehen sein, um den durch die Kugeln 42 erzeugten thermischen und mechanischen Belastungen beim Ultraschall-Kugelstrahlen stand halten zu können.In the present embodiment, the
In Zusammenschau mit
Insgesamt bleibt festzuhalten, dass die vorbeschriebenen verstellbaren Wandbereiche 26, 36 und 48 getrennt, wie auch gemeinsam innerhalb der Strahlkammer vorgesehen sein können. Ebenfalls ist es denkbar, eine Kombination einer insgesamt mit Luft zu befüllenden Kammerwand 12 - gemäß den Linien 44 - mit einem separat zu befüllenden Wandbereich 26, 36 und 48 zu kombinieren.Overall, it should be noted that the above-described
Um einen Verlust von Kugeln 42 oder dergleichen Strahlmittel innerhalb der Strahlkammer ermitteln zu können, ist im vorliegenden Ausführungsbeispiel eine Einrichtung 48 zur Ermittlung der Schallemission innerhalb der Strahlkammer angeordnet. Wird demgemäß ein Verlust an Kugeln 42 detektiert, so ist die Einrichtung 58 über eine Leitung 60 mit einer Einrichtung 62 zum Nachdosieren der sich innerhalb der Strahlkammer befindenden Kugeln 42 verbunden. Durch das gegebenenfalls erforderliche Nachfüllen von Kugeln 42 mittels der Einrichtung 62 wird sichergestellt, dass sets eine gleichbleibende Menge an Kugeln 42 bzw. dergleichen Strahlmittel innerhalb der Strahlkammer angeordnet ist, so dass ein äußerst gleichbleibendes und leicht reproduzierbares Oberflächenergebnis auch bei einer Vielzahl von Turbinenschaufeln 10 erreicht werden kann.In order to be able to determine a loss of balls or the like within the blasting chamber, in the present exemplary embodiment a
Claims (9)
- A peening chamber for ultrasonically shot-peening components, in particular gas turbine components (10), which at least with a component region (20) comprising the surface to be treated are to be arranged within the peening chamber or within a chamber wall (12) which spatially delimits the peening chamber, wherein at least one wall region (26, 36) of the chamber wall (12) is formed so as to be adjustable in order to vary the geometry of the peening chamber, characterised in that the wall region (26, 36) of the chamber wall (12) .is adjustable linearly and/or at an incline by inflating, by filling with liquid or gas, an element that supports the wall region (26, 36).
- A peening chamber according to claim 1, characterised in that the chamber wall (12) of the peening chamber is shaped from a flexibly yielding material, in particular a rubber material.
- A peening chamber according to one of the preceding claims, characterised in that the chamber wall (12) comprises at least one wall opening (18) for guiding through the component region (20) comprising the surface to be treated, wherein the wall region (48) of the chamber wall (12) adjacent to the wall opening (18) is formed so as to be adjustable.
- A peening chamber according to claim 3, characterised in that the wall region (48) of the chamber wall (12) that is adjacent to the wall opening (18) forms with respect to the component (10), which is guided through the wall opening (18), a seal (50) with which the escape of peening material located within the peening chamber can be avoided.
- A peening chamber according to claim 4, characterised in that provided in the region of contact of the seal (50) with the component (10) that is guided through the wall opening (18) there is a sliding element (52).
- A peening chamber according to one of the preceding claims, characterised in that an ultrasonic sonotrode (16) is provided for the acceleration of peening means located within the peening chamber and constituted in particular by spheres (42).
- A peening chamber according to one of the preceding claims, characterised in that a device (58) for determining the acoustic emission of the peening material is provided within the peening chamber.
- A peening chamber according to one of the preceding claims, characterised in that a device (62) is provided for re-dosing the peening material located within the peening chamber.
- A peening chamber according to claim 7 and 8, characterised in that the device (62) for re-dosing is connected to the device (58) for determining the acoustic emission of the peening material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006008210A DE102006008210A1 (en) | 2006-02-22 | 2006-02-22 | Shot-peening chamber for ultrasonic shot peening of especially gas turbine components has facility wherein for changing geometry of the chamber at least one wall section is adjustable by means of inflation or filling with gas |
PCT/DE2007/000283 WO2007095903A1 (en) | 2006-02-22 | 2007-02-15 | Peening chamber for surface peening, in particular for ultrasonic shot peening of gas turbine components |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1986817A1 EP1986817A1 (en) | 2008-11-05 |
EP1986817B1 true EP1986817B1 (en) | 2011-06-29 |
Family
ID=37907444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07702443A Not-in-force EP1986817B1 (en) | 2006-02-22 | 2007-02-15 | Peening chamber for surface peening, in particular for ultrasonic shot peening of gas turbine components |
Country Status (4)
Country | Link |
---|---|
US (1) | US7673486B2 (en) |
EP (1) | EP1986817B1 (en) |
DE (1) | DE102006008210A1 (en) |
WO (1) | WO2007095903A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004037954A1 (en) * | 2004-08-05 | 2006-03-16 | Mtu Aero Engines Gmbh | Device for surface blasting of components |
US7665338B2 (en) * | 2006-10-20 | 2010-02-23 | Sonats-Societe Des Nouvelles Applications Des Techniques De Surfaces | Shot peening methods and units |
DE102008011243A1 (en) * | 2008-02-14 | 2009-08-20 | Mtu Aero Engines Gmbh | Apparatus and method for surface blasting of a component |
JP5148329B2 (en) * | 2008-03-06 | 2013-02-20 | 三菱重工業株式会社 | Shot peening apparatus and vibrator for shot peening |
JP5448784B2 (en) * | 2009-12-18 | 2014-03-19 | 三菱重工業株式会社 | Shot peening equipment |
DE102010006094B4 (en) * | 2010-01-28 | 2013-06-27 | Siemens Aktiengesellschaft | Process for surface hardening a component of a wind turbine |
US20110252850A1 (en) * | 2010-04-14 | 2011-10-20 | Jian Lu | Method and device of enhancing diffusibility of metallic surfaces and applications thereof |
GB2492831A (en) * | 2011-07-14 | 2013-01-16 | Hkpb Scient Ltd | Workpiece surface modification during ultrasonic peening |
US9670561B2 (en) * | 2014-04-11 | 2017-06-06 | City University Of Hong Kong | Apparatus and a method for surface processing a metallic structure |
US10493594B2 (en) | 2016-04-12 | 2019-12-03 | General Electric Company | Apparatus and method for peening of machine components |
FR3061055B1 (en) * | 2016-12-26 | 2019-07-26 | Safran Aircraft Engines | DEVICE FOR PROCESSING A METAL PIECE, METHOD AND ASSEMBLY OF PROJECTILES THEREFOR |
CN109517955A (en) * | 2018-11-16 | 2019-03-26 | 上海蜂云航空科技有限公司 | It is a kind of for improving the method and apparatus of engine nozzle jet stream orifice thermal stability |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4355488A (en) * | 1980-01-14 | 1982-10-26 | Air Products And Chemicals, Inc. | Cryogenic deflashing method |
FR2689431B1 (en) * | 1992-04-06 | 1995-10-20 | Teknoson | METHOD AND DEVICE, IN PARTICULAR FOR ULTRASONIC HARDENING OF METAL PARTS. |
FR2715884B1 (en) * | 1994-02-04 | 1996-04-12 | Gec Alsthom Electromec | Method and device for the surface treatment and the prestressing of the interior wall of a cavity. |
US5950470A (en) * | 1998-09-09 | 1999-09-14 | United Technologies Corporation | Method and apparatus for peening the internal surface of a non-ferromagnetic hollow part |
US6170308B1 (en) * | 1999-07-20 | 2001-01-09 | United Technologies Corporation | Method for peening the internal surface of a hollow part |
FR2812285B1 (en) * | 2000-07-28 | 2003-02-07 | Univ Troyes Technologie | NANOSTRUCTURE PROCESSING METHOD AND NANOSTRUCTURE PROCESSING DEVICE |
FR2814099B1 (en) * | 2000-09-21 | 2002-12-20 | Snecma Moteurs | CROSS-SECTIONAL SENSING BY ULTRASSONS OF BLADES ON A 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 (en) * | 2000-11-16 | 2003-07-18 | Snecma Moteurs | SHOT BLASTING OF COOLED DAWN TOP |
DE102004029546A1 (en) | 2004-06-19 | 2006-01-05 | Mtu Aero Engines Gmbh | Method and apparatus for surface blasting gas turbine blades in the area of their blade roots |
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 |
FR2907360B1 (en) * | 2006-10-20 | 2009-05-22 | Sonats Soc Des Nouvelles Appli | METHODS AND INSTALLATIONS OF SCRATCHES. |
-
2006
- 2006-02-22 DE DE102006008210A patent/DE102006008210A1/en not_active Withdrawn
-
2007
- 2007-02-15 US US12/280,329 patent/US7673486B2/en not_active Expired - Fee Related
- 2007-02-15 WO PCT/DE2007/000283 patent/WO2007095903A1/en active Application Filing
- 2007-02-15 EP EP07702443A patent/EP1986817B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
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EP1986817A1 (en) | 2008-11-05 |
DE102006008210A1 (en) | 2007-08-23 |
US7673486B2 (en) | 2010-03-09 |
US20090011686A1 (en) | 2009-01-08 |
WO2007095903A1 (en) | 2007-08-30 |
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