EP2397251B1 - Deburring tool for a tool spindle of a machine tool and method for high-pressure deburring - Google Patents

Deburring tool for a tool spindle of a machine tool and method for high-pressure deburring Download PDF

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Publication number
EP2397251B1
EP2397251B1 EP20100166161 EP10166161A EP2397251B1 EP 2397251 B1 EP2397251 B1 EP 2397251B1 EP 20100166161 EP20100166161 EP 20100166161 EP 10166161 A EP10166161 A EP 10166161A EP 2397251 B1 EP2397251 B1 EP 2397251B1
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Prior art keywords
tool
deburring
pressure
spindle
high pressure
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EP20100166161
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German (de)
French (fr)
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EP2397251A1 (en
Inventor
Stefan Weber
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Schwaebische Werkzeugmaschinen GmbH
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Schwaebische Werkzeugmaschinen GmbH
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Priority to EP20100166161 priority Critical patent/EP2397251B1/en
Priority to ES10166161T priority patent/ES2416070T3/en
Publication of EP2397251A1 publication Critical patent/EP2397251A1/en
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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
    • B24C1/02—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for sharpening or cleaning cutting tools, e.g. files
    • 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
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the present invention relates to a deburring tool for high pressure deburring of workpieces with a deburring nozzle according to the preamble of claim 1.
  • Such a deburring tool is from the EP 0 669 187 bakett. Moreover, the invention relates to a machine tool with such a deburring tool and a method for high-pressure deburring.
  • the method of high-pressure deburring is used.
  • special machines are used in which a high-pressure nozzle ("deburring") exhibiting Deburring tool is guided by means of robots or conventional machine axes to the workpiece and to be deburred position.
  • the pressure generation is stationary by means of a high-pressure pump and is guided by means of pipes and hoses to the deburring.
  • the pressures during high-pressure deburring are usually 300 to 800 bar.
  • a deburring medium water, emulsion or oil can be used, the high-pressure deburring often combined with the washing.
  • the deburring tool is designed as a tool for changing a coolant supply tool spindle of a machine tool and has a high-pressure generating device which increases the coolant supplied via the tool spindle to a high-pressure deburring required high pressure and as deburring the deburring nozzle supplies.
  • the deburring tool according to the invention can be used on single-spindle or multi-spindle machine tools ("machining centers").
  • the deburring tool with its deburring nozzle can be loaded into the tool spindle via the tool changing system of the machine tool and then positioned as exactly as possible over the machine axes to the point to be deburred. Since the workpiece is still stretched during deburring in exactly the same position as in the previous machining, takes place in comparison to known high-pressure deburring a more accurate positioning of the deburring to the workpiece. This improves the deburring result and reduces the risk of damage to the workpiece due to a collision of the deburring nozzle (deburring lance) with the workpiece.
  • the special advantage for the customer is that in many cases he does not have to invest in a special machine for high-pressure deburring.
  • the tool spindle coolant (conventional coolant) with a "normal" high pressure of about 70 bar (150 bar max in special design with small cross sections or volume flows) fed and then guided in the tool spindle to the tool.
  • a "normal" high pressure of about 70 bar (150 bar max in special design with small cross sections or volume flows) fed and then guided in the tool spindle to the tool.
  • high pressure deburring does not work, and supplying the cooling liquid with higher pressures is also not possible with conventional tool spindles because the rotary union and the seals in the tool spindle are not suitable for such higher pressures.
  • the high pressure required for Hoch horrentgraten of at least about 200 bar, in particular 300 to 800 bar, is therefore according to the invention only "after" the tool spindle generated by a high-pressure generating device in the deburring tool itself.
  • the deburring tool is coupled via the standard interface of the tool spindle (e.g., hollow shaft taper interface (HSK)), and the coolant supply to the deburring tool is via the internal coolant supply to the tool spindle.
  • HSK hollow shaft taper interface
  • the high-pressure generating device can be driven by the tool spindle.
  • the energy for the pressure increase is thus based on the rotation of the motor-driven iiverk Wegspindei.
  • An additional drive motor for the high-pressure generating device can thus be dispensed with.
  • the high pressure generation in the deburring tool can be done with different principles.
  • the high-pressure generating device is designed as a high-pressure pump whose pump element is rotationally coupled to the tool spindle.
  • pump systems such as radial piston or gear pumps, which are driven via the tool spindle and whose housing is rotationally fixed to the machine tool via a torque support.
  • pump systems are operated at a speed of about 2000 U / min.
  • pump systems in which a pump piston is driven by a diverter gear through the tool spindle. In this case, the spindle rotation is converted into an axial piston movement by means of a screw drive.
  • the pressure is generated according to the principle of a water spray gun.
  • the piston movement compresses the liquid which is supplied to the nozzle.
  • a torque arm is also required. This process does not work continuously in contrast to the aforementioned pump systems.
  • a suction stroke is required in each case, in which the cylinder is filled again with the cooling liquid to be compressed.
  • the high-pressure generating device is designed as a hydraulic pressure booster, which generates the pressure required for Hochlichentgraten high pressure of over 200 bar hydraulically from the supplied with about 70 bar coolant.
  • the entire deburring tool can be rotationally coupled to the tool spindle.
  • the high-pressure generating device is designed as a turbine (“turbine pump”), which is rotationally coupled to the tool spindle and generates the high pressure required for Hochdruckentgraten by their rotation in the supplied cooling liquid.
  • At least the housing of the deburring tool can be fixed in a rotationally fixed manner to the machine tool via a torque support or the entire deburring tool can be rotationally coupled to the tool spindle.
  • the invention also relates to a machine tool for machining workpieces with a workpiece holder and at least one tool spindle for selectively receiving one of a plurality of tools, wherein for machining a workpiece, the workpiece holder and the tool spindle are movable relative to each other and wherein the tool spindle up to the recorded tool Having extending coolant supply, as well as with a deburring tool as trained above.
  • the advantage of the machine tool according to the invention is that only minor changes are necessary on the machine side. From today's point of view - at least for the period of the deburring process - only an improved filtration of the cooling tool supplied to the deburring tool is required. Further machine-side adjustments are not necessary.
  • the equipment of the machine tool with a torque support and an internal coolant supply in the tool spindle are standard in machining centers today.
  • the high-pressure generating device is located in the working space of the machine tool. Thus, safety risks are excluded by the already existing on the machine side safety devices, such as security cover, locking, etc. Furthermore, it is not necessary that the high-pressure generating device operates leak-free, because any escaping deburring liquid - as previously the cooling liquid - is collected in the working space.
  • the deburring tool can either rotate with the tool spindle or at least partially fixed in rotation by means of a torque support of the machine tool on the housing.
  • the deburring tool is accommodated in a tool magazine of a tool change system provided for the tool spindle, in order to be changed into the tool spindle when required.
  • the invention also relates to a method for high-pressure deburring of workpieces that are machined in a machine tool by means of a high-pressure on the workpiece to be deburred Entgratnetkeit, with a deburring tool is replaced as a change tool in a tool spindle of the machine tool, the one to Entgrattechnikmaschineitati leading cooling fluid supply, and wherein the coolant supplied via the tool spindle in the deburring tool is increased to the high pressure required for high pressure deburring and used as a deburring liquid.
  • the workpiece preferably remains tensioned in exactly the same position as in the case of a previous grating-producing machining operation.
  • machine tool (horizontal machining center) 1 has a machine frame 2 with at least one horizontal tool spindle 3 and with a workpiece holder 4 for receiving workpieces 5 , wherein for machining a workpiece 5, the tool spindle 3 is movable relative to the workpiece holder 4.
  • the tool spindle 3 is used for selectively receiving tools 6, which are accommodated in a tool magazine 7 of an automatic tool change system and are each loaded into the tool spindle 3.
  • the tool spindle 3 has an inner coolant supply 8 extending up to the tool 6 (FIG. Fig. 2 ), over which a cooling liquid 9 is led to the tool 6 to leak there through small holes and thereby cool the tool 6.
  • the filtered through a filter 10 cooling liquid 9 is supplied by a pump 11 with a machine-side pressure of about 70 bar via a rotary feedthrough 12 and the inner coolant supply 8 to the standard interface 13 (eg HSK) of the tool spindle 3, via which the respective recorded Tool 5 is coupled.
  • a deburring tool 20 For high-pressure deburring of a workpiece 5, a deburring tool 20 is provided, which is designed as a replacement tool for the tool spindle 3. As in Fig. 2 Shown in detail, the deburring tool 20 has a deburring lance 21 with two or more deburring nozzles 22 , via which a deburring liquid is directed under high pressure onto the workpiece 5 to be deburred.
  • a high-pressure generating device 23 is provided for this, which via the inner Coolant supply 8 with about 70 bar supplied cooling fluid 9 increased to the required high-pressure deburring high pressure of 300 to 800 bar and supplies as deburring to the deburring 22.
  • the pressure increase to the high pressure required for Hochlichentgraten high pressure is thus generated only after or downstream of the tool spindle 3 in the deburring tool 20 itself.
  • the deburring tool 20 with its deburring nozzle 22 can be changed over the tool change system of the machine tool 1 in the tool spindle 3 and then be positioned as exactly as possible over the machine axes of the movable workpiece holder 4 on the workpiece to be deburred 5 of the workpiece. Because the workpiece 5 is still stretched during deburring in exactly the same position as in the previous processing, compared to known Hochlichentgratmaschinen a more accurate positioning of the deburring 22 to the workpiece 5. This improves the Entgratfine and reduces the risk of damage to the workpiece 5 by a Collision of the deburring lance 21 with the workpiece 5.
  • the particular advantage for the customer is that in many cases he does not have to invest in a special machine for high-pressure deburring.
  • the high-pressure generating device 23 is located in the working space of the machine tool 1. Thus, safety risks through the machine-side safety devices, such as safety cover, locking, etc., excluded. Furthermore, it is not necessary that the high-pressure generating device 23 operates without leakage, because any escaping deburring liquid - as previously the cooling liquid 9 - is collected in the working space.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

Die vorliegende Erfindung betrifft ein Entgratwerkzeug zum Hochdruckentgraten von Werkstücken mit einer Entgratdüse nach dem Oberbegriff des Anspruch 1.The present invention relates to a deburring tool for high pressure deburring of workpieces with a deburring nozzle according to the preamble of claim 1.

Ein solches Entgratwerkzeug ist aus der EP 0 669 187 bakett. Außerdem betrifft die Erfindung eine Werkzeugmaschine mit einem solchem Entgratwerkzeug und ein Verfahren zum Hochdruckentgraten.Such a deburring tool is from the EP 0 669 187 bakett. Moreover, the invention relates to a machine tool with such a deburring tool and a method for high-pressure deburring.

Insbesondere in der Serienfertigung von Automobilteilen aus Aluminium kommt das Verfahren des Hochdruckentgratens zum Einsatz. Dabei werden spezielle Maschinen verwendet, bei denen ein eine Hochdruckdüse ("Entgratdüse") aufweisendes Entgratwerkzeug mittels Roboter oder konventionellen Maschinenachsen zum Werkstück und zur zu entgratenden Position geführt wird. Die Druckerzeugung erfolgt stationär mittels einer Hochdruckpumpe und wird mittels Rohren und Schläuchen zur Entgratdüse geführt. Die Drücke beim Hochdruckentgraten betragen meist 300 bis 800 bar. Als Entgratmedium kann Wasser, Emulsion oder auch Öl eingesetzt werden, wobei das Hochdruckentgraten oft mit dem Waschen kombiniert.In particular, in the mass production of automotive parts made of aluminum, the method of high-pressure deburring is used. In this case, special machines are used in which a high-pressure nozzle ("deburring") exhibiting Deburring tool is guided by means of robots or conventional machine axes to the workpiece and to be deburred position. The pressure generation is stationary by means of a high-pressure pump and is guided by means of pipes and hoses to the deburring. The pressures during high-pressure deburring are usually 300 to 800 bar. As a deburring medium, water, emulsion or oil can be used, the high-pressure deburring often combined with the washing.

Es ist die Aufgabe der vorliegenden Erfindung, das Hochdruckentgraten insbesondere für Werkstücke, die an einer Werkzeugmaschine mittels einer eine Kühlflüssigkeitszufuhr aufweisenden Werkzeugspindel bearbeitet werden, zu vereinfachen.It is the object of the present invention, the high-pressure deburring in particular for workpieces that are machined on a machine tool by means of a coolant supply having a tool spindle to simplify.

Diese Aufgabe wird bei dem eingangs genannten Entgratwerkzeug erfindungsgemäß dadurch gelöst, dass das Entgratwerkzeug als Wechselwerkzeug für eine eine Kühlflüssigkeitszufuhr aufweisende Werkzeugspindel einer Werkzeugmaschine ausgebildet ist und eine Hochdruckerzeugungsvorrichtung aufweist, die die über die Werkzeugspindel zugeführte Kühlflüssigkeit auf einen zum Hochdruckentgraten erforderlichen Hochdruck erhöht und als Entgratflüssigkeit an die Entgratdüse liefert.This object is achieved in the deburring tool mentioned above according to the invention that the deburring tool is designed as a tool for changing a coolant supply tool spindle of a machine tool and has a high-pressure generating device which increases the coolant supplied via the tool spindle to a high-pressure deburring required high pressure and as deburring the deburring nozzle supplies.

Das erfindungsgemäße Entgratwerkzeug kann auf 1- oder mehrspindligen Werkzeugmaschinen ("Bearbeitungszentren") zum Einsatz kommen. Das Entgratwerkzeug mit seiner Entgratdüse kann über das Werkzeugwechselsystem der Werkzeugmaschine in die Werkzeugspindel eingewechselt und dann über die Maschinenachsen möglichst exakt auf die zu entgratende Stelle positioniert werden. Weil das Werkstück beim Entgraten noch in exakt derselben Position wie bei der vorangegangenen Bearbeitung gespannt ist, erfolgt im Vergleich zu bekannten Hochdruckentgratmaschinen eine genauere Positionierung der Entgratdüse zum Werkstück. Dies verbessert das Entgratergebnis und reduziert das Risiko von Beschädigungen am Werkstück durch eine Kollision der Entgratdüse (Entgratlanze) mit dem Werkstück. Der besondere Vorteil für den Kunden liegt darin, dass er in vielen Fällen nicht in eine spezielle Maschine zum Hochdruckentgraten investieren muss.The deburring tool according to the invention can be used on single-spindle or multi-spindle machine tools ("machining centers"). The deburring tool with its deburring nozzle can be loaded into the tool spindle via the tool changing system of the machine tool and then positioned as exactly as possible over the machine axes to the point to be deburred. Since the workpiece is still stretched during deburring in exactly the same position as in the previous machining, takes place in comparison to known high-pressure deburring a more accurate positioning of the deburring to the workpiece. This improves the deburring result and reduces the risk of damage to the workpiece due to a collision of the deburring nozzle (deburring lance) with the workpiece. The special advantage for the customer is that in many cases he does not have to invest in a special machine for high-pressure deburring.

Bei herkömmlichen Werkzeugmaschinen wird der Werkzeugspindel Kühlflüssigkeit (konventioneller Kühlschmierstoff) mit einem "normalen" Hochdruck von ca. 70 bar (max. 150 bar in Sonderausführung mit geringen Querschnitten bzw. Volumenströmen) zugeführt und dann in der Werkzeugspindel weiter bis zum Werkzeug geführt. Allerdings funktioniert mit diesem normalen Hochdruck das Hochdruckentgraten nicht, und das Zuführen der Kühlflüssigkeit mit höheren Drücken ist mit konventionellen Werkzeugspindeln auch nicht möglich, da die Drehdurchführung und die Dichtungen in der Werkzeugspindel für solche höheren Drücke nicht geeignet sind.In conventional machine tools, the tool spindle coolant (conventional coolant) with a "normal" high pressure of about 70 bar (150 bar max in special design with small cross sections or volume flows) fed and then guided in the tool spindle to the tool. However, with this normal high pressure, high pressure deburring does not work, and supplying the cooling liquid with higher pressures is also not possible with conventional tool spindles because the rotary union and the seals in the tool spindle are not suitable for such higher pressures.

Der zum Hochdruckentgraten erforderliche Hochdruck von mindestens ca. 200 bar, insbesondere 300 bis 800 bar, wird daher erfindungsgemäßen erst "nach" der Werkzeugspindel durch eine Hochdruckerzeugungsvorrichtung im Entgratwerkzeug selbst erzeugt. Das Entgratwerkzeug wird über die Standardschnittstelle der Werkzeugspindel (z.B. Hohlschaftkegel-Schnittstelle (HSK)) angekuppelt, und die Kühlflüssigkeitszufuhr zum Entgratwerkzeug erfolgt über die innere Kühlmittelzufuhr der Werkzeugspindel.The high pressure required for Hochdruckentgraten of at least about 200 bar, in particular 300 to 800 bar, is therefore according to the invention only "after" the tool spindle generated by a high-pressure generating device in the deburring tool itself. The deburring tool is coupled via the standard interface of the tool spindle (e.g., hollow shaft taper interface (HSK)), and the coolant supply to the deburring tool is via the internal coolant supply to the tool spindle.

Bei besonders bevorzugten Ausführungsformen des erfindungsgemäßen Entgratwerkzeugs ist die Hochdruckerzeugungsvorrichtung von der Werkzeugspindel antreibbar. Die Energie für die Druckerhöhung wird also aus der Rotation der motorangetriebenen iiverkzeugspindei bezogen. Auf einen zusätzlichen Antriebsmotor für die Hochdruckerzeugungsvorrichtung kann somit verzichtet werden. Die Hochdruckerzeugung im Entgratwerkzeug kann mit unterschiedlichen Prinzipien erfolgen.In particularly preferred embodiments of the deburring tool according to the invention, the high-pressure generating device can be driven by the tool spindle. The energy for the pressure increase is thus based on the rotation of the motor-driven iiverkzeugspindei. An additional drive motor for the high-pressure generating device can thus be dispensed with. The high pressure generation in the deburring tool can be done with different principles.

In einer besonders bevorzugten ersten Weiterbildung ist die Hochdruckerzeugungsvorrichtung als Hochdruckpumpe ausgebildet, deren Pumpenelement mit der Werkzeugspindel drehgekoppelt wird. Möglich ist beispielsweise der Einsatz von Pumpensystemen, wie Radialkolben- oder Zahnradpumpen, die über die Werkzeugspindel angetrieben werden und deren Gehäuse über eine Drehmomentstütze rotatorisch an der Werkzeugmaschine fixiert ist. Üblicherweise werden solche Pumpen mit einer Drehzahl von ca. 2000 U/min betrieben. Möglich sind auch Pumpensysteme, bei denen ein Pumpkolben über ein Umlenkgetriebe durch die Werkzeugspindel angetrieben wird. Dabei wird mittels eines Gewindetriebs die Spindelrotation in eine axiale Kolbenbewegung umgesetzt. Die Druckerzeugung erfolgt nach dem Prinzip einer Wasserspritzpistole. Die Kolbenbewegung komprimiert die Flüssigkeit, welche der Düse zugeführt wird. Eine Drehmomentstütze ist ebenfalls erforderlich. Dieser Prozess arbeitet im Gegensatz zu den vorgenannten Pumpensystemen nicht kontinuierlich. Vor dem Komprimieren ist jeweils ein Saughub erforderlich, bei dem der Zylinder wieder mit der zu komprimierenden Kühlflüssigkeit befüllt wird.In a particularly preferred first development, the high-pressure generating device is designed as a high-pressure pump whose pump element is rotationally coupled to the tool spindle. For example, it is possible to use pump systems, such as radial piston or gear pumps, which are driven via the tool spindle and whose housing is rotationally fixed to the machine tool via a torque support. Usually, such pumps are operated at a speed of about 2000 U / min. Also possible pump systems in which a pump piston is driven by a diverter gear through the tool spindle. In this case, the spindle rotation is converted into an axial piston movement by means of a screw drive. The pressure is generated according to the principle of a water spray gun. The piston movement compresses the liquid which is supplied to the nozzle. A torque arm is also required. This process does not work continuously in contrast to the aforementioned pump systems. Before the compression, a suction stroke is required in each case, in which the cylinder is filled again with the cooling liquid to be compressed.

In einer zweiten Weiterbildung ist die Hochdruckerzeugungsvorrichtung als hydraulischer Druckübersetzer ausgebildet, der den zum Hochdruckentgraten erforderlichen Hochdruck von über 200 bar hydraulisch aus der mit ca. 70 bar zugeführten Kühlflüssigkeit erzeugt. Hierbei kann das gesamte Entgratwerkzeug mit der Werkzeugspindel drehgekoppelt sein.In a second development, the high-pressure generating device is designed as a hydraulic pressure booster, which generates the pressure required for Hochdruckentgraten high pressure of over 200 bar hydraulically from the supplied with about 70 bar coolant. In this case, the entire deburring tool can be rotationally coupled to the tool spindle.

In einer dritten Weiterbildung ist die Hochdruckerzeugungsvorrichtung als Turbine ("Turbinenpumpe") ausgebildet, die mit der Werkzeugspindel drehgekoppelt wird und durch ihre Rotation in der zugeführten Kühlflüssigkeit den zum Hochdruckentgraten erforderlichen Hochdruck erzeugt.In a third development, the high-pressure generating device is designed as a turbine ("turbine pump"), which is rotationally coupled to the tool spindle and generates the high pressure required for Hochdruckentgraten by their rotation in the supplied cooling liquid.

Je nach Ausführung der Hochdruckerzeugungsvorrichtung ist entweder zumindest das Gehäuse des Entgratwerkzeugs über eine Drehmomentabstützung an der Werkzeugmaschine drehfest fixierbar oder aber das gesamte Entgratwerkzeug mit der Werkzeugspindel drehgekoppelt.Depending on the design of the high-pressure generating device either at least the housing of the deburring tool can be fixed in a rotationally fixed manner to the machine tool via a torque support or the entire deburring tool can be rotationally coupled to the tool spindle.

Die Erfindung betrifft auch eine Werkzeugmaschine zum Bearbeiten von Werkstücken mit einer Werkstückhalterung und mindestens einer Werkzeugspindel zur wahlweisen Aufnahme eines von mehreren Werkzeugen, wobei für eine Bearbeitung eines Werkstücks die Werkstückhalterung und die Werkzeugspindel relativ zueinander bewegbar sind und wobei die Werkzeugspindel eine sich bis zum aufgenommenen Werkzeug erstreckende Kühlmittelzufuhr aufweist, sowie mit einem wie oben ausgebildeten Entgratwerkzeug.The invention also relates to a machine tool for machining workpieces with a workpiece holder and at least one tool spindle for selectively receiving one of a plurality of tools, wherein for machining a workpiece, the workpiece holder and the tool spindle are movable relative to each other and wherein the tool spindle up to the recorded tool Having extending coolant supply, as well as with a deburring tool as trained above.

Der Vorteil der erfindungsgemäßen Werkzeugmaschine liegt darin, dass maschinenseitig nur geringe Veränderungen notwendig sind. Aus heutiger Sicht ist - zumindest für den Zeitraum des Entgratvorgangs - lediglich eine verbesserte Filtrierung der dem Entgratwerkzeug zugeführten Kühlflüssigkeit erforderlich. Weitere maschinenseitige Anpassungen sind nicht notwendig. Die Ausstattung der Werkzeugmaschine mit einer Drehmomentstütze und einer inneren Kühlflüssigkeitszufuhr in der Werkzeugspindel sind heute Standard bei Bearbeitungszentren. Ebenso ist von Vorteil, dass sich beim Hochdruckentgraten die Hochdruckerzeugungsvorrichtung im Arbeitsraum der Werkzeugmaschine befindet. Damit sind Sicherheitsrisiken durch die maschinenseitig bereits vorhandenen Sicherheitseinrichtungen, wie Sicherheitsverkleidung, Verriegelung usw., ausgeschlossen. Des Weiteren ist es nicht erforderlich, dass die Hochdruckerzeugungsvorrichtung leckagefrei arbeitet, weil eventuell austretende Entgratflüssigkeit -wie bisher auch schon die Kühlflüssigkeit - im Arbeitraum aufgefangen wird.The advantage of the machine tool according to the invention is that only minor changes are necessary on the machine side. From today's point of view - at least for the period of the deburring process - only an improved filtration of the cooling tool supplied to the deburring tool is required. Further machine-side adjustments are not necessary. The equipment of the machine tool with a torque support and an internal coolant supply in the tool spindle are standard in machining centers today. It is also an advantage in the case of high-pressure deburring, the high-pressure generating device is located in the working space of the machine tool. Thus, safety risks are excluded by the already existing on the machine side safety devices, such as security cover, locking, etc. Furthermore, it is not necessary that the high-pressure generating device operates leak-free, because any escaping deburring liquid - as previously the cooling liquid - is collected in the working space.

Das Entgratwerkzeug kann entweder mit der Werkzeugspindel mitdrehen oder zumindest teilweise mittels einer Drehmomentstütze der Werkzeugmaschine am Gehäuse drehfest fixiert sein.The deburring tool can either rotate with the tool spindle or at least partially fixed in rotation by means of a torque support of the machine tool on the housing.

Besonders bevorzugt ist das Entgratwerkzeug in einem Werkzeugmagazin eines für die Werkzeugspindel vorgesehenen Werkzeugwechselsystems aufgenommen, um bei Bedarf in die Werkzeugspindel eingewechselt zu werden.Particularly preferably, the deburring tool is accommodated in a tool magazine of a tool change system provided for the tool spindle, in order to be changed into the tool spindle when required.

Die Erfindung betrifft schließlich auch noch ein Verfahren zum Hochdruckentgraten von Werkstücken, die in einer Werkzeugmaschine bearbeitet werden, mittels einer unter Hochdruck auf das zu entgratende Werkstück gerichteten Entgratflüssigkeit, wobei ein Entgratwerkzeug als Wechselwerkzeug in eine Werkzeugspindel der Werkzeugmaschine eingewechselt wird, die eine bis zum Entgratwerkzeug führende Kühlflüssigkeitszufuhr aufweist, und wobei die über die Werkzeugspindel zugeführte Kühlflüssigkeit im Entgratwerkzeug auf den zum Hochdruckentgraten erforderlichen Hochdruck erhöht und als Entgratflüssigkeit verwendet wird.Finally, the invention also relates to a method for high-pressure deburring of workpieces that are machined in a machine tool by means of a high-pressure on the workpiece to be deburred Entgratflüssigkeit, with a deburring tool is replaced as a change tool in a tool spindle of the machine tool, the one to Entgratwerkzeug leading cooling fluid supply, and wherein the coolant supplied via the tool spindle in the deburring tool is increased to the high pressure required for high pressure deburring and used as a deburring liquid.

Vorzugsweise bleibt beim Hochdruckentgraten das Werkstück noch in exakt derselben Position wie bei einer vorangegangenen graterzeugenden Bearbeitung gespannt.In the case of high-pressure deburring, the workpiece preferably remains tensioned in exactly the same position as in the case of a previous grating-producing machining operation.

Weitere bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. Weitere Vorteile der Erfindung ergeben sich aus der Beschreibung und der Zeichnung. Ebenso können die vorstehend genannten und die noch weiter aufgeführten Merkmale je für sich oder zu mehreren in beliebigen Kombinationen Verwendung finden. Die gezeigten und beschriebenen Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter für die Schilderung der Erfindung.Further preferred embodiments of the invention are the subject of the dependent claims. Further advantages of the invention will become apparent from the description and the drawings. Likewise, the features mentioned above and the features listed further can be used individually or in combination in any combination. The embodiments shown and described are not as but rather have an exemplary character for the description of the invention.

Es zeigen:

Fig. 1
eine Seitenansicht der Werkzeugmaschine mit dem erfindungsgemäßen Entgratwerkzeug; und
Fig. 2
eine vergrößerte Detailansicht des in Fig. 1 gezeigten Entgratwerkzeugs.
Show it:
Fig. 1
a side view of the machine tool with the deburring tool according to the invention; and
Fig. 2
an enlarged detail view of the in Fig. 1 deburring tool shown.

Die in Fig. 1 gezeigte Werkzeugmaschine (horizontales Bearbeitungszentrum) 1 weist einen Maschinenrahmen 2 mit mindestens einer horizontalen Werkzeugspindel 3 und mit einer Werkstückhalterung 4 zur Aufnahme von Werkstücken 5 auf, wobei für eine Bearbeitung eines Werkstücks 5 die Werkzeugspindel 3 relativ zu der Werkstückhalterung 4 verfahrbar ist. Die Werkzeugspindel 3 dient zur wahlweisen Aufnahme von Werkzeugen 6, die in einem Werkzeugmagazin 7 eines automatischen Werkzeugwechselsystems aufgenommen sind und jeweils in die Werkzeugspindel 3 eingewechselt werden.In the Fig. 1 shown machine tool (horizontal machining center) 1 has a machine frame 2 with at least one horizontal tool spindle 3 and with a workpiece holder 4 for receiving workpieces 5 , wherein for machining a workpiece 5, the tool spindle 3 is movable relative to the workpiece holder 4. The tool spindle 3 is used for selectively receiving tools 6, which are accommodated in a tool magazine 7 of an automatic tool change system and are each loaded into the tool spindle 3.

Die Werkzeugspindel 3 weist eine sich bis zum aufgenommenen Werkzeug 6 erstreckende innere Kühlmittelzufuhr 8 (Fig. 2) auf, über die eine Kühlflüssigkeit 9 bis zum Werkzeug 6 geführt wird, um dort über kleine Bohrungen auszutreten und dadurch das Werkzeug 6 zu kühlen. Die durch einen Filter 10 gefilterte Kühlflüssigkeit 9 wird von einer Pumpe 11 mit einem maschinenseitigen Druck von ca. 70 bar über eine Drehdurchführung 12 und die innere Kühlmittelzufuhr 8 bis an die Standardschnittstelle 13 (z.B. HSK) der Werkzeugspindel 3 geliefert, über die das jeweils aufgenommene Werkzeug 5 angekuppelt ist.The tool spindle 3 has an inner coolant supply 8 extending up to the tool 6 (FIG. Fig. 2 ), over which a cooling liquid 9 is led to the tool 6 to leak there through small holes and thereby cool the tool 6. The filtered through a filter 10 cooling liquid 9 is supplied by a pump 11 with a machine-side pressure of about 70 bar via a rotary feedthrough 12 and the inner coolant supply 8 to the standard interface 13 (eg HSK) of the tool spindle 3, via which the respective recorded Tool 5 is coupled.

Zum Hochdruckentgraten eines Werkstücks 5 ist ein Entgratwerkzeug 20 vorgesehen, das als Wechselwerkzeug für die Werkzeugspindel 3 ausgebildet ist. Wie in Fig. 2 im Detail gezeigt, weist das Entgratwerkzeug 20 eine Entgratlanze 21 mit zwei oder mehr Entgratdüsen 22 auf, über die eine Entgratflüssigkeit unter einem Hochdruck auf das zu entgratende Werkstück 5 gerichtet wird. Im Entgratwerkzeug 20 ist dazu eine Hochdruckerzeugungsvorrichtung 23 vorgesehen, welche die über die innere Kühlmittelzufuhr 8 mit ca. 70 bar zugeführte Kühlflüssigkeit 9 auf den zum Hochdruckentgraten erforderlichen Hochdruck von 300 bis 800 bar erhöht und als Entgratflüssigkeit an die Entgratdüsen 22 liefert. Die Druckerhöhung auf den zum Hochdruckentgraten erforderlichen Hochdruck wird also erst nach bzw. stromabwärts der Werkzeugspindel 3 im Entgratwerkzeug 20 selbst erzeugt.For high-pressure deburring of a workpiece 5, a deburring tool 20 is provided, which is designed as a replacement tool for the tool spindle 3. As in Fig. 2 Shown in detail, the deburring tool 20 has a deburring lance 21 with two or more deburring nozzles 22 , via which a deburring liquid is directed under high pressure onto the workpiece 5 to be deburred. In the deburring tool 20, a high-pressure generating device 23 is provided for this, which via the inner Coolant supply 8 with about 70 bar supplied cooling fluid 9 increased to the required high-pressure deburring high pressure of 300 to 800 bar and supplies as deburring to the deburring 22. The pressure increase to the high pressure required for Hochdruckentgraten high pressure is thus generated only after or downstream of the tool spindle 3 in the deburring tool 20 itself.

Die Hochdruckerzeugung in der Hochdruckerzeugungsvorrichtung 23 kann mit unterschiedlichen, an sich bekannten Prinzipien erfolgen.

  • Möglich ist der Einsatz von Pumpensystemen, wie Radialkolben- oder Zahnradpumpen, die über die Werkzeugspindel 3 angetrieben werden und deren Pumpgehäuse 24 über eine am Entgratwerkzeug 20 vorgesehene Drehmomentstütze 25 am Maschinenrahmen 2 rotatorisch fixiert ist. Üblicherweise werden solche Pumpen mit einer Drehzahl von ca. 2000 U/min betrieben, wobei mit der Werkzeugspindel 3 auch höhere Drehzahlen möglich wären.
  • Möglich sind auch Pumpensysteme, bei denen ein Zylinder über ein Umlenkgetriebe durch die Werkzeugspindel 3 angetrieben wird. Dabei wird mittels eines Gewindetriebs die Spindelrotation in eine axiale Kolbenbewegung umgesetzt. Die Kolbenbewegung komprimiert die Flüssigkeit, welche den Entgratdüsen 23 zugeführt wird. Auch hier ist das Pumpgehäuse 24 über die Drehmomentstütze 25 am Maschinenrahmen 2 rotatorisch fixiert ist.
  • Neben den genannten Pumpensystemen, bei denen die Energie für die Druckerzeugung durch die Rotation der Werkzeugspindel 3 erzeugt wird, können auch rein hydraulisch betriebene Systeme eingesetzt werden, bei denen die Energie zur Druckerhöhung mittels eines Druckübersetzers hydraulisch aus der mit 70 bar zugeführten Kühlflüssigkeit erzeugt wird. Hier kann sich das gesamte Entgratwerkzeug 20 mit der Werkzeugspindel 3 mitdrehen, d.h., eine Drehmomentstütze ist nicht erforderlich.
  • Eine weitere Möglichkeit ist der Einsatz eines Turbinensystems, bei dem die Kühlflüssigkeit mit 70 bar in eine Turbine eingespritzt wird. ("Turbinenpumpe"). Die Turbine erhöht durch ihre schnelle Rotation die kinetische Energie und damit den Druck der Kühlflüssigkeit auf bis zu 300 bar oder mehr.
The high pressure generation in the high pressure generating device 23 can be done with different, known per se principles.
  • It is possible to use pump systems, such as radial piston or gear pumps, which are driven via the tool spindle 3 and whose pump housing 24 is rotationally fixed on the machine frame 2 via a torque support 25 provided on the deburring tool 20. Usually, such pumps are operated at a speed of about 2000 U / min, with the tool spindle 3 and higher speeds would be possible.
  • Also possible pump systems in which a cylinder is driven by a diverter gear through the tool spindle 3. In this case, the spindle rotation is converted into an axial piston movement by means of a screw drive. The piston movement compresses the liquid which is fed to the deburring nozzles 23. Again, the pump housing 24 is rotatably fixed on the torque arm 25 on the machine frame 2.
  • In addition to the aforementioned pump systems, in which the energy for the pressure generation is generated by the rotation of the tool spindle 3, purely hydraulically operated systems can be used in which the energy for increasing the pressure by means of a pressure booster is hydraulically generated from the supplied with 70 bar coolant. Here, the entire deburring tool 20 can rotate with the tool spindle 3, ie, a torque arm is not required.
  • Another possibility is the use of a turbine system in which the cooling liquid is injected at 70 bar into a turbine. ( "Turbine pump"). Due to its fast rotation, the turbine increases the kinetic energy and thus the pressure of the cooling liquid up to 300 bar or more.

Das Entgratwerkzeug 20 mit seinen Entgratdüse 22 kann über das Werkzeugwechselsystem der Werkzeugmaschine 1 in die Werkzeugspindel 3 eingewechselt und dann über die Maschinenachsen der bewegbaren Werkstückhalterung 4 möglichst exakt auf die zu entgratende Stelle des Werkstücks 5 positioniert werden. Weil das Werkstück 5 beim Entgraten noch in exakt derselben Position wie bei der vorangegangenen Bearbeitung gespannt ist, erfolgt im Vergleich zu bekannten Hochdruckentgratmaschinen eine genauere Positionierung der Entgratdüsen 22 zum Werkstück 5. Dies verbessert das Entgratergebnis und reduziert das Risiko von Beschädigungen am Werkstück 5 durch eine Kollision der Entgratlanze 21 mit dem Werkstück 5. Der besondere Vorteil für den Kunden liegt darin, dass er in vielen Fällen nicht in eine spezielle Maschine zum Hochdruckentgraten investieren muss. Ebenso ist von Vorteil, dass sich die Hochdruckerzeugungsvorrichtung 23 im Arbeitsraum der Werkzeugmaschine 1 befindet. Damit sind Sicherheitsrisiken durch die maschinenseitigen Sicherheitseinrichtungen, wie Sicherheitsverkleidung, Verriegelung usw., ausgeschlossen. Des Weiteren ist es nicht erforderlich, dass die Hochdruckerzeugungsvorrichtung 23 leckagefrei arbeitet, weil eventuell austretende Entgratflüssigkeit - wie bisher auch schon die Kühlflüssigkeit 9 - im Arbeitraum aufgefangen wird.The deburring tool 20 with its deburring nozzle 22 can be changed over the tool change system of the machine tool 1 in the tool spindle 3 and then be positioned as exactly as possible over the machine axes of the movable workpiece holder 4 on the workpiece to be deburred 5 of the workpiece. Because the workpiece 5 is still stretched during deburring in exactly the same position as in the previous processing, compared to known Hochdruckentgratmaschinen a more accurate positioning of the deburring 22 to the workpiece 5. This improves the Entgratergebnis and reduces the risk of damage to the workpiece 5 by a Collision of the deburring lance 21 with the workpiece 5. The particular advantage for the customer is that in many cases he does not have to invest in a special machine for high-pressure deburring. It is also advantageous that the high-pressure generating device 23 is located in the working space of the machine tool 1. Thus, safety risks through the machine-side safety devices, such as safety cover, locking, etc., excluded. Furthermore, it is not necessary that the high-pressure generating device 23 operates without leakage, because any escaping deburring liquid - as previously the cooling liquid 9 - is collected in the working space.

Claims (13)

  1. Deburring tool (20) for high-pressure deburring of workpieces (5), comprising at least one deburring nozzle (22) through which a deburring liquid is directed onto the workpiece (5) to be deburred, wherein the deburring tool (20) is designed as an interchangeable tool for a tool spindle (3) of a machine tool (1), the tool spindle comprising a coolant supply (8),
    characterized in that the deburring tool (20) comprises a high pressure-generating device (23), which increases the pressure of the coolant (9) supplied via the tool spindle (3) to a high pressure, which is required for high-pressure deburring, and supplies the coolant as deburring liquid to the deburring nozzle (22).
  2. Deburring tool according to claim 1, characterized in that the high pressure-generating device (23) can be driven by the tool spindle (3).
  3. Deburring tool according to claim 1 or 2, characterized in that the high pressure-generating device (23) is designed as a high-pressure pump, the pump element of which is coupled with the tool spindle (3) for co-rotation therewith.
  4. Deburring tool according to claim 1 or 2, characterized in that the high pressure-generating device (23) is designed as a hydraulic pressure intensifier which hydraulically generates the high pressure, which is required for high-pressure deburring, from the supplied coolant (9).
  5. Deburring tool according to claim 1 or 2, characterized in that the high pressure-generating device (23) is designed as a turbine which is coupled with the tool spindle (3) for co-rotation therewith and generates, through its rotation in the supplied coolant (9), the high pressure which is required for high-pressure deburring.
  6. Deburring tool according to any one of the preceding claims, characterized in that at least the housing (24) of the deburring tool (20) can be non-rotationally fixed to the machine tool (1).
  7. Deburring tool according to any one of the claims 1 to 5, characterized in that the entire deburring tool (20) is coupled with the tool spindle (3) for co-rotation therewith.
  8. Deburring tool according to any one of the preceding claims, characterized in that the high pressure-generating device (23) is designed to generate a high pressure of at least approximately 200 bar, in particular, of a range between approximately 300 to approximately 800 bar.
  9. Machine tool (1) for processing workpieces (5), comprising a workpiece holder (4) and at least one tool spindle (3) for selectively receiving one of a plurality of tools (6), wherein for processing a workpiece (5), the workpiece holder (4) and the tool spindle (3) can be moved relative to each other and wherein the tool spindle (3) has a coolant supply (8) that extends to the received tool (6), and also comprising a deburring tool (20) according to any one of the preceding claims.
  10. Machine tool according to claim 9, characterized in that at least part of the deburring tool (20) is non-rotationally fixed via a torque support (25).
  11. Machine tool according to claim 9 or 10, characterized in that the deburring tool (20) is accommodated in a tool magazine (7) of a tool change system provided for the tool spindle (3).
  12. Method for high-pressure deburring of workpieces (5), which are processed in a machine tool (1), by means of a deburring liquid directed under high pressure onto the workpiece (5) to be deburred, wherein a deburring tool (20) is inserted as interchangeable tool into a tool spindle (3) of the machine tool (1), the tool spindle comprising a coolant supply (8) that extends to the deburring tool (20), and wherein the pressure of the coolant (9) supplied via the tool spindle (3) is increased in the deburring tool (20) to the high pressure which is required for high-pressure deburring and the coolant is used as deburring liquid.
  13. Method according to claim 12, characterized in that during high-pressure deburring, the workpiece (5) is still clamped in exactly the same position as during previous processing in which the burr was generated.
EP20100166161 2010-06-16 2010-06-16 Deburring tool for a tool spindle of a machine tool and method for high-pressure deburring Active EP2397251B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20100166161 EP2397251B1 (en) 2010-06-16 2010-06-16 Deburring tool for a tool spindle of a machine tool and method for high-pressure deburring
ES10166161T ES2416070T3 (en) 2010-06-16 2010-06-16 Deburring tool for a tool spindle of a machine tool, as well as a procedure for high pressure deburring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100166161 EP2397251B1 (en) 2010-06-16 2010-06-16 Deburring tool for a tool spindle of a machine tool and method for high-pressure deburring

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EP2397251A1 EP2397251A1 (en) 2011-12-21
EP2397251B1 true EP2397251B1 (en) 2013-04-17

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US11919012B2 (en) 2019-12-06 2024-03-05 Pdq Workholding Llc High pressure fluid tool

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JPS59171050U (en) * 1983-04-28 1984-11-15 株式会社　溝口鉄工所 Holder with oil hole
JPS6097242U (en) * 1983-12-07 1985-07-02 大昭和精機株式会社 Oil supply device for rotary cutting tools
DE4403327A1 (en) * 1994-02-03 1995-08-10 Karl Bauch Cleaning device for multi-shafted machine tool
US5535496A (en) * 1994-02-25 1996-07-16 Sugino Corporation Machine tool with parts

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