EP1990131A1 - Method and apparatus for grinding the blade tips of a rotor wheel in blisk design - Google Patents
Method and apparatus for grinding the blade tips of a rotor wheel in blisk design Download PDFInfo
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- EP1990131A1 EP1990131A1 EP08155781A EP08155781A EP1990131A1 EP 1990131 A1 EP1990131 A1 EP 1990131A1 EP 08155781 A EP08155781 A EP 08155781A EP 08155781 A EP08155781 A EP 08155781A EP 1990131 A1 EP1990131 A1 EP 1990131A1
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- EP
- European Patent Office
- Prior art keywords
- grinding
- blade
- grinding wheel
- blisk
- impeller
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
Definitions
- the invention relates to a device for blade tip grinding of a BLISK design trained, comprising at least one blade ring impeller, in particular for compressors of gas turbine engines, comprising a rotatable support member for receiving the impeller and a rotating about a rotation axis grinding wheel, which in a Z direction is mounted along the support member and perpendicular to this adjustable in the X direction carriages.
- the invention further relates to a method for creating the blade tips of BLISKS.
- the invention has for its object to provide a device for blade tip grinding of wheels or impeller drums of compressors for gas turbine engines in such a way that trained in BLISK design rotors in high quality and life can be made with reduced effort.
- the basic idea of the invention is that the blade tips of a BLISK are ground individually in the direction of the greatest resistance moment of the blades, that is, the grinding direction or the force effect of the grinding wheel and the alignment or the course of the blade upper edge substantially coincide , The individual blades whose vibration tendency strong due to the selected grinding direction is reduced, thereby significantly less burden during grinding.
- the machining accuracy can be increased and the grinding time and energy consumption can be lowered. Due to the reduced load during tilling the life of the blades, or the BLISK can be increased.
- the quality of each adjacent blades during grinding is not affected by flying sparks.
- the grinding preferably takes place in each case starting from the front edge and the trailing edge of the blade up to the middle of the upper edge of the blade, so that the risk of damage in the case of brittle materials or delicate geometries is further reduced.
- the device according to the invention for carrying out the method comprises a stepwise drivable holding element for the BLISK or BLISK drum and a grinding wheel that can be moved in height and pivotable about a horizontal axis in the longitudinal direction of the BLISK drum and perpendicular thereto, so that it can be aligned during grinding according to the course of the blade upper edge, that is to say in the direction of the largest moment of resistance of the blade.
- the grinding wheel is also pivotable about a vertical axis, so that its position can be adapted to the cone of the adjacent blade rings of a BLISK drum.
- the apparatus may have a high-speed shaft for grinding a conventional impeller held thereon and rotating at high speed by means of the grinding wheel stationary and not pivoted in this case in a known manner.
- a main drive 2 with a high-speed shaft 3 is arranged on a machine bed 1, on the blade tip grinding a conventionally designed impeller consisting of a disc with detachably mounted in this detachably manufactured blades, or a correspondingly shaped impeller drum ( each not shown), can be attached.
- a conventionally designed impeller consisting of a disc with detachably mounted in this detachably manufactured blades, or a correspondingly shaped impeller drum ( each not shown)
- the tips of the blades thus damped may have one in the same plane (not shown) as the high speed shaft 3 rotating grinding wheel 4 with high grinding speed and be ground in good quality.
- the grinding wheel 4 is mounted on a carriage 5 which is movable on the machine bed 1 in the longitudinal direction (Z-direction according to double arrow Z) of the high speed shaft 3 and perpendicular to this in the X direction according to double arrow X to the grinding wheel 4 according to the blade height to be able to approach the blade tips (X-direction) and - in the case of a rotor drum - to be able to move to the adjacent blade ring (Z-direction).
- the grinding wheel 4 rotatable about a rotation axis 9 is held on a supporting column 10 rotatable on the carriage 5 about a vertical axis in the direction of the arrow B.
- the grinding wheel 4 is connected to the column 10 so that it is vertically adjustable according to the double arrow Y along the support column 10, that is height adjustable and also according to the double arrow A about a relative to the vertical axis of the support column 10 horizontal axis (X direction ) is pivotable.
- the rotation axis 9 of the grinding wheel 4 can be pivoted in the direction of arrow A so that the grinding wheel 4 does not lie in a plane with the respective blade rim of the BLISK or BLISK drum, but rather on the respective course of the blade tips of the blade can be aligned to be machined blade ring.
- the blade tips conventional wheels, consisting of a disc with circumferentially mounted in a groove, separately manufactured blades are ground in a known manner such that the wheel to be machined mounted on the high-speed shaft 3 and the grinding wheel 4 according to the double arrow Z to the height of the blade ring to be machined and accordingly the blade height is positioned at the blade tips.
- the grinding wheel 4 is in a vertical position, in which the axis of rotation 9 is parallel to the high speed shaft 3 and the impeller axis. Now, while the impeller is rotating at high speed, the blade tips of the vanes printed by the centrifugal force are ground in a shock damped position.
- a BLISK drum For grinding the blade tips of a BLISK drum, it is mounted on the holding element 9 connected to the auxiliary drive 8.
- the carriage 5 is moved in the X direction and Z direction so that the grinding wheel 4 is set against the tip of a blade of the blade ring to be machined.
- the axis of rotation 9 of the grinding wheel 4 is adjusted during the grinding process, ie pivoted, and moved in Y direction that their grinding direction is always aligned parallel to the staggering angle of the blade tip and the course of the blade upper edge and thus the grinding wheel 4 bein procedures in the Y direction is aligned substantially in accordance with the course of the blade tip and this follows.
- the blade tip is thus ground energy-saving in the state of rest in the direction of its highest modulus, so that the tendency to oscillate during grinding is significantly reduced, thereby improving the dimensional accuracy of grinding and the life of the blades is increased. Due to the orientation of the grinding wheel 4 of the upper blade edge, the sparking during blade tip grinding no longer hits adjacent blades, so that their surface formation is not impaired.
- the tip grinding is carried out in each case starting from the leading edge and the trailing edge of the blade to the blade center, so that in the case of brittle materials and / or sensitive geometries the risk of Fogging of the blade tip is minimized during blade tip grinding.
- a contouring of the grinding wheel according to the Anuluskontur is not required.
- the BLISK drum is rotated by means of the auxiliary drive 8 so far that the next blade of the blade ring can be ground.
- the grinding wheel 4 is aligned by moving the carriage 5 on the adjacent blade ring, wherein the blade is aligned by rotating the support column 10 with the turntable 6 so that it corresponds to the cone of the adjacent Blade ring or the cone of BLISK drum is set. Subsequently, the grinding operation is performed on the blade tips of this blade ring in the manner described above.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Schaufelspitzenschleifen eines in BLISK-Bauweise ausgebildeten, mindestens einen Schaufelkranz umfassenden Laufrades, insbesondere für Kompressoren von Gasturbinentriebwerken, die ein drehbares Halteelement zur Aufnahme des Laufrades sowie eine um eine Rotationsachse rotierende Schleifscheibe umfasst, die an einem in Z-Richtung längs des Halteelements und senkrecht zu diesem in X-Richtung verstellbaren Schlitten angebracht ist. Die Erfindung bezieht sich weiterhin auf ein Verfahren zum Schaffen der Schaufelspitzen von BLISKS.The invention relates to a device for blade tip grinding of a BLISK design trained, comprising at least one blade ring impeller, in particular for compressors of gas turbine engines, comprising a rotatable support member for receiving the impeller and a rotating about a rotation axis grinding wheel, which in a Z direction is mounted along the support member and perpendicular to this adjustable in the X direction carriages. The invention further relates to a method for creating the blade tips of BLISKS.
Schleifvorrichtungen der eingangs erwähnten Art sind bekannt und werden zum Schleifen der Schaufelspitzen von separat gefertigten und an der Laufradscheibe montierten Schaufeln konventioneller Laufräder mit Erfolg eingesetzt, Aufgrund des zusammen mit dem Halteelement bei hoher Geschwindigkeit rotierenden Rotors bzw. der Rotortrommel (Laufrad oder Laufradtrommel) werden die Schaufeln infolge der Fliehkraft radial nach außen gedrückt und sind somit während des Schleifprozesses stabil und dennoch gedampft an der Schleifscheibe positioniert.Grinding devices of the type mentioned are known and are used for grinding the blade tips of separately manufactured and mounted on the impeller blades blades conventional wheels with success, Due to rotating together with the holding member at high speed rotor or the rotor drum (impeller or impeller drum) are the As a result of the centrifugal force, the blades are pressed radially outwards and are thus positioned on the grinding wheel in a stable and yet damped manner during the grinding process.
Beim Schleifen der Schaufelspitzen von in Integralbauweise ausgeführten Rotoren oder Rotortrommeln der Kompressoren von Fluggasturbinen treten aufgrund der geringen Dämpfung zwischen der Scheibe und den einstückig angeformten Schaufeln gegenüber herkömmlichen Laufrädern und Schleifverfahren deutlich höhere Schwingungen auf. Die Schaufeln werben dadurch hoch belastet und können sich unter der Wirkung der Schleifscheibenkraft entwinden. Die Lebensdauer und die Maßgenuigkeit werden verringert. Das Spitzenschleifen von als BLISK ausgebildeten Laufrädern kann mit den bekannten Schleifvorrichtungen daher nur mit deutlich geringeren Schleifgeschwindigkeiten und dadurch verringerter Schleifleistung durchgeführt werden.When grinding the blade tips of integrally constructed rotors or rotor drums of the compressors of aircraft gas turbines occur due to the low attenuation between the disc and the integrally molded blades compared to conventional wheels and grinding significantly higher vibrations. The blades advertise thereby highly loaded and can recover under the effect of the grinding wheel force. The Lifespan and dimensional accuracy are reduced. The tip grinding of BLISK trained wheels can therefore be performed with the known grinding devices only with significantly lower grinding speeds and thus reduced grinding performance.
Um die durch das Schwingen der BLISK-Schaufeln beim Schleifen mit herkömmlichen Spitzenschleifvorrichtungen und -methoden bedingten Nachteile zu verhindern, ist es bereits bekannt, zwischen den Schaufeln elastische Dämpfungsmittel zu montieren. Abgesehen davon, dass sich die Dämpfungsmittel während des Betriebs aufgrund der hohen Fliehkräfte lösen können, ist deren Montage und Demontage mit einem erheblichen Arbeitsaufwand verbunden.In order to prevent the disadvantages caused by the oscillation of the BLISK blades when grinding with conventional tip grinding devices and methods, it is already known to mount elastic damping means between the blades. Apart from the fact that the damping means can be released during operation due to the high centrifugal forces, their assembly and disassembly is associated with a considerable amount of work.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Schaufelspitzenschleifen von Laufrädern oder Laufradtrommeln von Kompressoren für Gasturbinentriebwerke so auszubilden, dass auch in BLISK-Bauweise ausgebildete Rotoren in hoher Qualität und Lebensdauer bei verringertem Arbeitsaufwand hergestellt werden können.The invention has for its object to provide a device for blade tip grinding of wheels or impeller drums of compressors for gas turbine engines in such a way that trained in BLISK design rotors in high quality and life can be made with reduced effort.
Erfindungsgemäß wird die Aufgabe mit einer Vorrichtung gemäß den Merkmalen des Patentanspruchs 1 und einem Verfahren gemäß den Merkmalen des Patentanspruchs 3 gelöst Vorteilhafte Weiterbildungen und zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteranspruche.According to the invention the object is achieved with a device according to the features of claim 1 and a method according to the features of claim 3 Advantageous developments and expedient embodiments of the invention are the subject of the dependent claims.
Der Grundgedanke der Erfindung besteht darin, dass die Schaufelspitzen einer BLISK in ruhendem Zustand einzeln in Richtung des größten Widerstandsmoments der Schaufeln geschliffen werden, das heißt, die Schleifrichtung bzw. die Kraftwirkung der Schleifscheibe und die Ausrichtung bzw. der Verlauf der Schaufeloberkante stimmen im Wesentlichen überein. Die einzelnen Schaufeln, deren Schwingungsneigung infolge der gewählten Schleifrichtung stark verringert wird, werden dadurch beim Schleifen deutlich weniger belastet. Die Bearbeitungsgenauigkeit kann erhöht werden und die Schleifzeit und der Energieverbrauch können gesenkt werden. Aufgrund der verringerten Belastung beim Schweifen kann die Lebensdauer der Schaufeln, bzw. der BLISK erhöht werden. Darüber hinaus wird die Qualität der jeweils beim Schleifen benachbarten Schaufeln nicht durch Funkenflug beeinträchtigt. Vorzugsweise erfolgt das Schleifen jeweils ausgehend von der Vorderkante und der Hinterkante der Schaufel bis zur Mitte der Schaufeloberkante, so dass bei spröden Werkstoffen oder empfindlichen Geometrien die Gefahr einer Beschädigung beim Spitzenschleifen weiter verringert wird.The basic idea of the invention is that the blade tips of a BLISK are ground individually in the direction of the greatest resistance moment of the blades, that is, the grinding direction or the force effect of the grinding wheel and the alignment or the course of the blade upper edge substantially coincide , The individual blades whose vibration tendency strong due to the selected grinding direction is reduced, thereby significantly less burden during grinding. The machining accuracy can be increased and the grinding time and energy consumption can be lowered. Due to the reduced load during tilling the life of the blades, or the BLISK can be increased. In addition, the quality of each adjacent blades during grinding is not affected by flying sparks. The grinding preferably takes place in each case starting from the front edge and the trailing edge of the blade up to the middle of the upper edge of the blade, so that the risk of damage in the case of brittle materials or delicate geometries is further reduced.
Die erfindungsgemäße Vorrichtung zur Durchführung des Verfahrens umfasst ein schrittweise antreibbares Halteelement für die BLISK bzw. BLISK-Trommel und eine in Längsrichtung der BLISK-Trommel sowie senkrecht zu dieser anstellbare Schleifscheibe, die in der Höhe verfahrbar und um eine waagerechte Achse verschwenkbar ist, so dass sie beim Schleifen entsprechend dem Verlauf der Schaufel oberkante, das heißt in Richtung des größten Widerstandsmoments der Schaufel ausgerichtet werden kann. Darüber hinaus ist die Schleifscheibe auch um eine senkrechte Achse verschwenkbar, so dass deren Stellung an den Kegel der benachbarten Schaufelkränze einer BLISK-Trommel angepasst werden kann.The device according to the invention for carrying out the method comprises a stepwise drivable holding element for the BLISK or BLISK drum and a grinding wheel that can be moved in height and pivotable about a horizontal axis in the longitudinal direction of the BLISK drum and perpendicular thereto, so that it can be aligned during grinding according to the course of the blade upper edge, that is to say in the direction of the largest moment of resistance of the blade. In addition, the grinding wheel is also pivotable about a vertical axis, so that its position can be adapted to the cone of the adjacent blade rings of a BLISK drum.
Zum Schleifen von herkömmlichen Laufrädern kann die Vorrichtung über eine Hochgeschwindigkeitswelle verfügen, um ein auf dieser gehaltenes und mit hoher Geschwindigkeit rotierendes herkömmliches Laufrad mittels der in diesem Fall stationären und nicht verschwenkten Schleifscheibe in bekannter Weise an den zu schleifen.For grinding conventional wheels, the apparatus may have a high-speed shaft for grinding a conventional impeller held thereon and rotating at high speed by means of the grinding wheel stationary and not pivoted in this case in a known manner.
Ein Ausführungsbeispiel der Erfindung wird anhand der Zeichnung, in deren einziger Figur eine Vorrichtung zum Schaufelspitzenschleifen von in BLISK-Bauweise gefertigten als auch von konventionell ausgebildeten Rotoren schematisch dargestellt ist, näher erläutert.An embodiment of the invention will be explained in more detail with reference to the drawing, in the single figure of a device for blade tip grinding made in BLISK construction as well as conventionally designed rotors is illustrated in more detail.
Wie die Zeichnung zeigt, ist auf einem Maschinenbett 1 ein Hauptantrieb 2 mit einer Hochgeschwindigkeitswelle 3 angeordnet, auf der zum Schaufelspitzenschleifen ein in herkömmlicher Weise ausgebildetes Laufrad, bestehend aus einer Scheibe mit in dieser lösbar montierten, separat gefertigten Schaufeln, oder eine entsprechend gestaltete Laufradtrommel (jeweils nicht dargestellt), angebracht werden kann. Während in diesem Fall der den Schaufelspitzen zu bearbeitende Schaufelkranz mit hoher Geschwindigkeit rotiert und die Schaufeln aufgrund der Fliehkraft radial nach außen gedrückt weiden, können die Spitzen der auf diese Weise gedämpft gelagerten Schaufeln mit einer in der gleichen Ebene (nicht dargestellt) wie die Hochgeschwindigkeitswelle 3 rotierenden Schleifscheibe 4 mit hoher Schleifgeschwindigkeit und in guter Qualität geschliffen werden. Die Schleifscheibe 4 ist auf einem Schlitten 5 angebracht, der auf dem Maschinenbett 1 in Längsrichtung (Z-Richtung gemäß Doppelpfeil Z) der Hochgeschwindigkeitswelle 3 und senkrecht zu dieser in X-Richtung gemäß Doppelpfeil X verfahrbar ist, um die Schleifscheibe 4 entsprechend der Schaufelhöhe an die Schaufelspitzen heranfahren zu können (X-Richtung) und - bei einer Rotortrommel - zum benachbarten Schaufelkranz verfahren zu können (Z-Richtung).As the drawing shows, a main drive 2 with a high-speed shaft 3 is arranged on a machine bed 1, on the blade tip grinding a conventionally designed impeller consisting of a disc with detachably mounted in this detachably manufactured blades, or a correspondingly shaped impeller drum ( each not shown), can be attached. In this case, while the blade ring to be worked on the blade tips rotates at a high speed and the blades are pressed radially outward due to the centrifugal force, the tips of the blades thus damped may have one in the same plane (not shown) as the high speed shaft 3 rotating grinding wheel 4 with high grinding speed and be ground in good quality. The grinding wheel 4 is mounted on a carriage 5 which is movable on the machine bed 1 in the longitudinal direction (Z-direction according to double arrow Z) of the high speed shaft 3 and perpendicular to this in the X direction according to double arrow X to the grinding wheel 4 according to the blade height to be able to approach the blade tips (X-direction) and - in the case of a rotor drum - to be able to move to the adjacent blade ring (Z-direction).
Zum Schleifen der Schaufelspitzen eines in BLISK-Bauweise ausgebildeten Laufrades bzw, einer Laufradtrommel sind diese auf einem vom Hauptantrieb 2 der Hochgeschwindigkeitswelle 3 unabhängigen drehbaren Halteelement 7, das von einem auf dem Maschinenbett 1 angeordneten Hilfsantrieb 8 schrittweise angetrieben wird, angebracht. Das Halteelement 7 ist hier - wie die Hochgeschwindigkeitswelle 3 - der Einfachheit halber lediglich in Form einer Mittelachse dargestellt.For grinding the blade tips of a trained in BLISK construction impeller or, an impeller drum these are independent on a main drive 2 of the high-speed shaft 3 rotatable support member 7, which is arranged on the machine bed 1 auxiliary drive 8 is gradually driven, attached. The holding element 7 is shown here - like the high-speed shaft 3 - for the sake of simplicity only in the form of a central axis.
Die um eine Rotationsachse 9 drehbare Schleifscheibe 4 ist an einer auf dem Schlitten 5 um eine senkrechte Achse in Richtung des Pfeils B drehbaren Tragsäule 10 gehalten. Die drehbare Verbindung zwischen dem Schlitten 5 und der Tragsäule 10 erfolgt über einen Drehteller 6 mit in diesen integriertem Antrieb (nicht dargestellt). Die Schleifscheibe 4 ist so rit der Säule 10 verbunden, dass sie entsprechend dem Doppelpfeil Y entlang der Tragsäule 10 vertikal, das heißt höhenverstellbar ist und außerdem entsprechend dem Doppelpfeil A um eine in Bezug auf die senkrechte Achse der Tragsäule 10 waagerechte Achse (X-Richtung) verschwenkbar ist. Das herβt mit anderen Worten, die Rotationsachse 9 der Schleifscheibe 4 kann in Pfeilrichtung A verschwenkt werden, so dass die Schleifscheibe 4 nicht in einer Ebene mit dem jeweiligen Schau felkranz der BLISK bzw. BLISK-Trommel liegt, sondern auf den jeweiligen Verlauf der Schaufelspitzen des zu bearbeitenden Schaufelkranzes ausgerichtet werden kann.The grinding wheel 4 rotatable about a rotation axis 9 is held on a supporting
Das Verfahren zum Schleifen der Schaufelspitzen von Laufrädern bzw. einer Laufradtrommel mit der zuvor anhand der Zeichnung erläuterten Vorrichtung wird nachfolgend wie folgt beschrieben:The method for grinding the blade tips of impellers or an impeller drum with the previously explained with reference to the drawing device is described below as follows:
Die Schaufelspitzen herkömmlicher Laufräder, bestehend aus einer Scheibe mit an deren Umfang in einer Nut montierten, separat gefertigten Schaufeln, werden in bekannter Weise derart geschliffen, dass das zu bearbeitende Laufrad auf der Hochgeschwindigkeitswelle 3 befestigt und die Schleifscheibe 4 entsprechend dem Doppelpfeil Z auf die Höhe des zu bearbeitenden Schaufelkranzes und entsprechend der Schaufelhohe an den Schaufelspitzen positioniert wird. Die schleifscheibe 4 befindet sich in einer senkrechten Lage, in der deren Rotationsachse 9 parallel zur Hochgeschwindigkeitswelle 3 bzw. zur Laufradachse verläuft. Während nun das Laufrad mit hoher Geschwindigkeit rotiert, werden die Schaufelspitzen der durch die Fliehkraft nach außen gedruckten Schaufeln in einer stoß gedämpften Lage geschliffen.The blade tips conventional wheels, consisting of a disc with circumferentially mounted in a groove, separately manufactured blades are ground in a known manner such that the wheel to be machined mounted on the high-speed shaft 3 and the grinding wheel 4 according to the double arrow Z to the height of the blade ring to be machined and accordingly the blade height is positioned at the blade tips. The grinding wheel 4 is in a vertical position, in which the axis of rotation 9 is parallel to the high speed shaft 3 and the impeller axis. Now, while the impeller is rotating at high speed, the blade tips of the vanes printed by the centrifugal force are ground in a shock damped position.
Zum Schleifen der Schaufelspitzen einer BLISK-Trommel wird diese auf dem mit dem Hilfsantrieb 8 verbundenen Halteelement 9 montiert. Der Schlitten 5 wird in X-Richtung und Z-Richtung so verfahren, dass die Schleifscheibe 4 an die Spitze einer Schaufel des zu bearbeitenden Schaufelkranzes angestellt ist. Die Rotationsachse 9 der Schleifscheibe 4 wird während des Schleifvorgangs so eingestellt, d.h. verschwenkt, sowie in Y Richtung verfahren, dass ihre Schliffrichtung immer parallel zum Staggerwinkel der Schaufelspitze bzw. des Verlaufs der Schaufeloberkante ausgerichtet ist und somit die Schleifscheibe 4 bein Verfahren in Y-Richtung im Wesentlichen entsprechend dem Verlauf der Schaufelspitze ausgerichtet ist und diesem folgt. Die Schaufelspitze wird somit - energiesparend - in ruhendem Zustand in Richtung ihres höchsten Widerstandsmoments geschliffen, so dass die Schwingungsneigung beim Schleifen deutlich reduziert wird und dadurch die Maßgenauigkeit beim Schleifen verbessert und die Lebensdauer der Schaufeln erhöht wird. Aufgrund der Ausrichtung der Schleifscheibe 4 der Schaufeloberkante trifft der Funkenflug beim Schaufelspitzenschleifen nicht mehr auf benachbarte Schaufeln, so dass deren Oberflächenausbildung nicht beeinträchtigt wird. Vorzugsweise wird das Spitzenschleifen jeweils ausgehend von der Vorderkante und der Hinterkante der Schaufel bis zur Schaufelmitte durchgeführt, so dass bei spröden Werkstoffen und/oder empfindlichen Geometrien die Gefahr des Ausbrechens der Schaufelspitze beim Schaufelspitzenschleifen minimiert wird. Ein Konturieren der Schleifscheibe gemäß der Anuluskontur ist nicht erforderlich.For grinding the blade tips of a BLISK drum, it is mounted on the holding element 9 connected to the auxiliary drive 8. The carriage 5 is moved in the X direction and Z direction so that the grinding wheel 4 is set against the tip of a blade of the blade ring to be machined. The axis of rotation 9 of the grinding wheel 4 is adjusted during the grinding process, ie pivoted, and moved in Y direction that their grinding direction is always aligned parallel to the staggering angle of the blade tip and the course of the blade upper edge and thus the grinding wheel 4 bein procedures in the Y direction is aligned substantially in accordance with the course of the blade tip and this follows. The blade tip is thus ground energy-saving in the state of rest in the direction of its highest modulus, so that the tendency to oscillate during grinding is significantly reduced, thereby improving the dimensional accuracy of grinding and the life of the blades is increased. Due to the orientation of the grinding wheel 4 of the upper blade edge, the sparking during blade tip grinding no longer hits adjacent blades, so that their surface formation is not impaired. Preferably, the tip grinding is carried out in each case starting from the leading edge and the trailing edge of the blade to the blade center, so that in the case of brittle materials and / or sensitive geometries the risk of Fogging of the blade tip is minimized during blade tip grinding. A contouring of the grinding wheel according to the Anuluskontur is not required.
Nachdem eine Schaufelspitze geschliffen ist, wird die BLISK-Trommel mit Hilfe des Hilfsantriebs 8 soweit gedreht, dass die nächste Schaufel des Schaufelkranzes geschliffen werden kann. Wenn sämtliche Schaufelspitzen eines Schaufelkranzes der BLISK-Trommel geschliffen sind, wird die Schleifscheibe 4 durch Verfahren des Schlittens 5 auf den benachbarten Schaufelkranz ausgerichtet, wobei die Schaufel durch Drehen der Tragsäule 10 mit den Drehteller 6 so ausgerichtet wird, dass sie entsprechend dem Kegel des benachbarten Schaufelkranzes bzw. der Kegel der BLISK-Trommel eingestellt ist. Anschließend wird der Schleifvorgang an den Schaufelspitzen dieses Schaufelkranzes in der zuvor beschriebenen Weise durchgeführt.After a blade tip is ground, the BLISK drum is rotated by means of the auxiliary drive 8 so far that the next blade of the blade ring can be ground. When all the blade tips of a blade ring of the BLISK drum are ground, the grinding wheel 4 is aligned by moving the carriage 5 on the adjacent blade ring, wherein the blade is aligned by rotating the
Abgesehen von den bereits beschriebenen Vorteilen werden die Schleifzeiten verkürzt und der für das Verspannen der Schaufeln erforderliche Aufwand entfällt.Apart from the advantages already described, the grinding times are shortened and the effort required for clamping the blades is eliminated.
- 11
- Maschinenbettmachine bed
- 22
- Hauptantrieb für 3Main drive for 3
- 33
- HochgeschwindigkeitswelleHigh-speed shaft
- 44
- Schleifscheibegrinding wheel
- 55
- Schlittencarriage
- 66
- Drehtellerturntable
- 77
- Halteelement für BLIKS (BLISK-Drehachse)Retaining element for BLIKS (BLISK rotary axis)
- 88th
- Hilfsantrieb für 7Auxiliary drive for 7
- 99
- Rotationsachse von 4Rotation axis of 4
- 1010
- Tragsäule von 4Support pillar of 4
- Doppelpfeil XDouble Arrow X
- Anstellen von 4 in X-RichtungAdjusting 4 in the X direction
- Doppelpfeil ZDouble arrow Z
- Anstellen von 4 in Z-RichtungAdjusting 4 in the Z direction
- Pfeil BArrow B
- Drehrichtung v, 10 um senkrechte AchseDirection of rotation v, 10 about vertical axis
- Doppelpfeil ADouble arrow A
- Schwenkrichtung von 9/4Swivel direction of 9/4
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007022467A DE102007022467A1 (en) | 2007-05-08 | 2007-05-08 | Method and device for blade tip grinding of a trained in BLISK design impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1990131A1 true EP1990131A1 (en) | 2008-11-12 |
| EP1990131B1 EP1990131B1 (en) | 2014-07-23 |
Family
ID=39709332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08155781.1A Expired - Fee Related EP1990131B1 (en) | 2007-05-08 | 2008-05-07 | Method and apparatus for grinding the blade tips of a rotor wheel in blisk design |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7833086B2 (en) |
| EP (1) | EP1990131B1 (en) |
| DE (1) | DE102007022467A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2206577A1 (en) * | 2009-01-13 | 2010-07-14 | Rolls-Royce Deutschland Ltd & Co KG | Method for producing the blade tips of discs produced in a BLISK design |
| CN107160267A (en) * | 2017-04-24 | 2017-09-15 | 张家港清研再制造产业研究院有限公司 | A kind of solder joint automatically grinding device of the retired battery of intelligence |
| CN114700816A (en) * | 2022-03-31 | 2022-07-05 | 华能国际电力江苏能源开发有限公司 | Conveying fan rotor repairing device |
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|---|---|---|---|---|
| DE102008062364B4 (en) * | 2008-12-17 | 2021-01-21 | Rolls-Royce Deutschland Ltd & Co Kg | Method for blade tip grinding of a compressor drum |
| ES2368242B1 (en) * | 2010-04-27 | 2012-09-17 | Danobat, S. Coop. | DEVICE FOR RECTIFYING ROTOR DISK BLADES AND METHOD FOR CARRYING OUT RECTIFIED SUCH. |
| TWI613285B (en) | 2010-09-03 | 2018-02-01 | 聖高拜磨料有限公司 | Bonded abrasive article and method of forming |
| US9381615B2 (en) | 2012-05-03 | 2016-07-05 | Pratt & Whitney Canada Corp. | Method of machining surfaces of rotor disc and grinding machine therefor |
| US9266219B2 (en) | 2012-12-31 | 2016-02-23 | Saint-Gobain Abrasives, Inc. | Bonded abrasive article and method of grinding |
| JP2016501735A (en) | 2012-12-31 | 2016-01-21 | サンーゴバン アブレイシブズ，インコーポレイティド | Bonded abrasive article and grinding method |
| WO2014106159A1 (en) | 2012-12-31 | 2014-07-03 | Saint-Gobain Abrasives, Inc. | Bonded abrasive article and method of grinding |
| DE112014001102T5 (en) | 2013-03-31 | 2015-11-19 | Saint-Gobain Abrasifs | Bound abrasive article and grinding process |
| CN103264325A (en) * | 2013-05-16 | 2013-08-28 | 广州市敏嘉制造技术有限公司 | Grinding machine tool for grinding dry screw rotor |
| CN103264339A (en) * | 2013-05-16 | 2013-08-28 | 广州市敏嘉制造技术有限公司 | Grinding method for grinding dry screw rotor |
| DE102014222848B4 (en) * | 2014-11-10 | 2021-03-04 | Supfina Grieshaber Gmbh & Co. Kg | Finishing device |
| CN107263254B (en) * | 2017-06-23 | 2021-01-05 | 电子科技大学 | Automatic grinding machine for full-profile of blades and flow channel between blades of aviation engine blisk |
| CN113021186B (en) * | 2021-02-23 | 2022-12-13 | 贵阳航发精密铸造有限公司 | Grinding fixture for tenon of aviation turbine blade |
| CN114833382B (en) * | 2022-04-14 | 2023-11-21 | 中国航发贵州黎阳航空动力有限公司 | Method for processing length of blade tip of fan blade |
| CN115431137B (en) * | 2022-09-21 | 2023-10-20 | 赣州诚正稀土新材料股份有限公司 | Impeller production and processing equipment for impeller aerator and application method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1491289A1 (en) * | 2002-03-26 | 2004-12-29 | Danobat, S. Coop. | Rotor-grinding machine comprising a rotary head with two grinding wheels |
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|---|---|---|---|---|
| US4471673A (en) * | 1982-08-23 | 1984-09-18 | Foley Belsaw Company | Sharpening apparatus for circular saw blades |
| US5197191A (en) * | 1991-03-04 | 1993-03-30 | General Electric Company | Repair of airfoil edges |
| GB2270485A (en) * | 1992-09-09 | 1994-03-16 | Butler Newall Ltd | Grinding blade tips of turbine/compressor rotors |
| DE69712607T2 (en) * | 1996-02-29 | 2002-12-12 | Gleason Works | METHOD FOR MACHINING GEARS WHILE SHARING |
| US6453211B1 (en) * | 2000-03-02 | 2002-09-17 | General Electric Company | Nominal shift machining |
| US6562227B2 (en) * | 2001-07-31 | 2003-05-13 | General Electric Company | Plunge electromachining |
| US6787728B2 (en) * | 2002-12-27 | 2004-09-07 | General Electric Company | Method and apparatus for near net shape rapid rough electromachining for blisks |
| US7144307B2 (en) * | 2003-03-27 | 2006-12-05 | United Technologies Corporation | Point superabrasive machining of nickel alloys |
| SI21497A (en) * | 2003-12-01 | 2004-12-31 | Drago �ENDAK | Device for sharpening the teeth of a chain-saw |
| DE102005041031A1 (en) * | 2005-08-24 | 2007-03-01 | Blohm Maschinenbau Gmbh | Method for machining workpieces with curved surfaces, in particular for grinding turbine blades, machine tool and programming system |
| US7473160B1 (en) * | 2006-08-09 | 2009-01-06 | S.E. Huffman Corp | Method and apparatus for grinding a workpiece |
| US20080131216A1 (en) * | 2006-12-05 | 2008-06-05 | Pratt & Whitney Canada Corp. | Cup mill for airfoils |
| US7303461B1 (en) * | 2006-12-05 | 2007-12-04 | Pratt & Whitney Canada Corp. | Method of machining airfoils by disc tools |
| US7896728B2 (en) * | 2007-09-13 | 2011-03-01 | United Technologies Corporation | Machining methods using superabrasive tool |
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2007
- 2007-05-08 DE DE102007022467A patent/DE102007022467A1/en not_active Withdrawn
-
2008
- 2008-05-07 EP EP08155781.1A patent/EP1990131B1/en not_active Expired - Fee Related
- 2008-05-08 US US12/149,839 patent/US7833086B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1491289A1 (en) * | 2002-03-26 | 2004-12-29 | Danobat, S. Coop. | Rotor-grinding machine comprising a rotary head with two grinding wheels |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2206577A1 (en) * | 2009-01-13 | 2010-07-14 | Rolls-Royce Deutschland Ltd & Co KG | Method for producing the blade tips of discs produced in a BLISK design |
| JP2010180877A (en) * | 2009-01-13 | 2010-08-19 | Rolls-Royce Deutschland Ltd & Co Kg | Method for manufacturing blisk type rotor wheel blade tip |
| US8850703B2 (en) | 2009-01-13 | 2014-10-07 | Rolls-Royce Deutschland Ltd & Co Kg | Method for the manufacture of the blade tips of rotor wheels made in BLISK design |
| CN107160267A (en) * | 2017-04-24 | 2017-09-15 | 张家港清研再制造产业研究院有限公司 | A kind of solder joint automatically grinding device of the retired battery of intelligence |
| CN114700816A (en) * | 2022-03-31 | 2022-07-05 | 华能国际电力江苏能源开发有限公司 | Conveying fan rotor repairing device |
| CN114700816B (en) * | 2022-03-31 | 2023-10-03 | 华能国际电力江苏能源开发有限公司 | Conveying fan rotor repairing device |
Also Published As
| Publication number | Publication date |
|---|---|
| US7833086B2 (en) | 2010-11-16 |
| DE102007022467A1 (en) | 2008-11-13 |
| EP1990131B1 (en) | 2014-07-23 |
| US20080280546A1 (en) | 2008-11-13 |
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