EP2252413B1 - Device and method for deburring and/or cleaning a workpiece dipped in a fluid medium - Google Patents

Device and method for deburring and/or cleaning a workpiece dipped in a fluid medium Download PDF

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Publication number
EP2252413B1
EP2252413B1 EP09718973A EP09718973A EP2252413B1 EP 2252413 B1 EP2252413 B1 EP 2252413B1 EP 09718973 A EP09718973 A EP 09718973A EP 09718973 A EP09718973 A EP 09718973A EP 2252413 B1 EP2252413 B1 EP 2252413B1
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EP
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Prior art keywords
chamber
gas
jet
liquid
fluid
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Application number
EP09718973A
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German (de)
French (fr)
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EP2252413A1 (en
Inventor
Werner Karls
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Ecoclean GmbH
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Duerr Ecoclean GmbH
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Priority to PL09718973T priority Critical patent/PL2252413T3/en
Publication of EP2252413A1 publication Critical patent/EP2252413A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid

Definitions

  • the present invention relates to a device for deburring and / or cleaning a workpiece immersed in a liquid medium, comprising a liquid discharge device for producing a high-pressure-loaded liquid jet.
  • Such a device is particularly well suited for deburring and / or cleaning of mechanically, in particular machined, machined workpieces.
  • a workpiece By subjecting a workpiece to a high pressure fluid jet, burrs and / or contaminants may be separated from the workpiece.
  • the GB 2 078 546 A discloses a device for cleaning underwater structures, such as oil rigs, which comprises a liquid discharge device for generating a high pressure fluid jet and a gas discharge device for generating a gas flow surrounding the liquid jet. Furthermore, the device comprises a recoil jet arrangement, which likewise comprises a liquid discharge device for producing a high-pressure-loaded liquid jet and a gas discharge device for producing a gas stream enclosing the liquid jet.
  • the WO 02/44020 A1 discloses a device for cleaning boat hulls submerged in water comprising a liquid discharge device for generating a high pressure fluid jet and a gas discharge device for generating a volume in which the density is lower than in the surrounding water, the high pressure liquid jet being forced through this lower density volume passes.
  • the present invention is based on the object to provide a device for deburring and / or cleaning a immersed in a liquid medium workpiece, which is particularly efficient.
  • the device according to the invention makes it possible to provide a gas stream which at least partially shields the liquid jet from the liquid medium, so that the friction between the liquid jet and the liquid medium can be considerably reduced. This ensures that the liquid jet during its movement through the liquid medium in the direction of the workpiece is not or only slightly slowed down.
  • This has the advantage that a liquid jet generated by the device according to the invention has a higher kinetic energy upon impact with a workpiece surface than is the case with devices known from the prior art. This can the deburring and / or cleaning effect can be improved.
  • the liquid jet can be subjected to a lower pressure, whereby the energy consumption of the device according to the invention compared with devices known from the prior art is reduced with identical deburring and / or cleaning action.
  • the liquid discharge device advantageously comprises a nozzle or high-pressure nozzle.
  • a nozzle makes it possible to discharge a high pressurized liquid from the liquid discharge device, thereby forming a liquid jet.
  • a liquid jet can be generated, which has a substantially circular solid beam profile, or a flat beam profile, which is elongated or elliptical.
  • the jet angle of the liquid jet is as small as possible.
  • a beam angle is understood to mean the angle between opposing peripheral boundaries of the liquid jet.
  • the beam angle is at most about 25 °, in particular at most about 15 °.
  • the device according to the invention has the further advantage that, with the aid of the gas flow in the region of the liquid discharge device, direct contact of the liquid emerging from a nozzle with the liquid medium and resulting cavitation damage to the nozzle can be prevented.
  • the device according to the invention makes it possible to achieve a high deburring and / or cleaning effect with a low energy input.
  • the device according to the invention makes it possible to deburr and / or clean a workpiece with particularly low noise and low emissions.
  • the gas flow allows a sound decoupling of the high pressure Liquid jet on the one hand and the liquid medium on the other. With the help of the gas flow also an interaction between the liquid jet and the liquid medium is reduced, so that the formation of a liquid mist can be at least largely prevented. Accordingly, the device according to the invention makes it possible to dispense with external extraction systems or to be able to dimension corresponding extraction systems very small.
  • liquid medium in which the workpiece is immersed it is preferably a liquid cleaning medium, for example, water.
  • a container for example in the form of a tank, is preferably provided, the container volume of which may be between a few liters and several cubic meters.
  • the container volume may be between a few liters and several cubic meters.
  • the high-pressure liquid is preferably water and / or oil and / or an emulsion.
  • the liquid is preferably applied with a high pressure of greater than about 100 bar.
  • the liquid is subjected to a pressure which is between 300 bar and 2700 bar, in particular between 500 bar and 2500 bar.
  • a high pressure pump is preferably provided, by means of which the liquid discharge device can be supplied with high pressure fluid.
  • the gas stream is an air stream. This has the advantage that a workpiece can be deburred and / or cleaned free of emissions.
  • the gas stream envelops at least part of the circumference of the liquid jet. It is particularly preferred if the circumference of the liquid jet is completely enveloped by the gas stream.
  • the gas stream can be acted upon by a pressure.
  • a pressurization has the advantage that a collapse of the gas flow envelope, which surrounds the liquid jet at least in sections, is prevented.
  • compressed air can be used to generate the gas flow.
  • the gas flow can be acted upon by a pressure which corresponds at least to the sum of the ambient pressure of the device and of the hydrostatic pressure of the liquid medium acting at the level of the gas flow.
  • a pressure which corresponds at least to the sum of the ambient pressure of the device and of the hydrostatic pressure of the liquid medium acting at the level of the gas flow.
  • the pressure of the gas stream at an ambient pressure of 1 bar and at an immersion depth of 1 m at least about 1.1 bar.
  • a low pressure which is for example a maximum of about 10 bar.
  • the device comprises a housing having a chamber which has at least one liquid chamber inlet for the admission of high pressure fluid in the chamber, at least one gas chamber inlet for the entry of gas into the chamber and at least one chamber outlet for the outlet of the high pressure fluid jet and of the gas stream.
  • a chamber makes it possible to introduce high pressure-pressurized liquid and gas separately from one another into the chamber and to conduct it out of the chamber together, in such a way that the gas stream at least partially envelops the liquid jet.
  • the chamber comprises exactly one liquid chamber inlet and / or exactly one chamber outlet.
  • At least part of the gas can be introduced into the chamber substantially parallel to the jet axis of the liquid jet.
  • a gas flow envelope can be generated in a simple manner.
  • the liquid chamber inlet and the at least one gas chamber inlet are arranged on the same chamber boundary surface, so that the gas and the liquid can be introduced into the chamber in a particularly simple manner in mutually substantially parallel direction.
  • a plurality of gas chamber entrances are provided. These are distributed in particular in the circumferential direction around the liquid chamber inlet and preferably arranged equidistant from each other. With the help of several gas chamber entrances, it is possible to introduce a gas in particular evenly distributed in the chamber.
  • the gas chamber inlet is annular and is preferably arranged concentrically to a jet axis of the liquid jet. This allows a particularly uniform introduction of a gas into the chamber.
  • At least part of the gas can be introduced into the chamber in a gas introduction direction inclined to the jet axis of the liquid jet. This supports the generation of a shell-shaped gas flow which at least partially surrounds the liquid jet.
  • the liquid chamber inlet and at least one gas chamber entrance to different chamber boundary surfaces arranged. This makes it possible in a particularly simple manner to introduce at least a portion of the gas in a direction inclined to the jet axis of the liquid jet in the direction of the chamber.
  • the direction of entry of the gas into the chamber is perpendicular, in particular radially to the jet axis of the liquid jet. This allows the generation of a circumferentially closed gas flow envelope.
  • the direction of entry of the gas into the chamber is tangential to the jet axis of the liquid jet. In this way, vortex formation can be promoted within the chamber to form a gas flow envelope surrounding the fluid jet.
  • At least a portion of the gas in a direction relative to the direction of gravity vertical direction, ie from above and / or from below, are introduced into the chamber.
  • a plurality of gas chamber inlets and / or an annular gas chamber inlet may be provided.
  • the chamber has a chamber cross-section taken perpendicular to the chamber longitudinal axis, which tapers towards the chamber outlet. This makes it possible to guide the gas in the direction of the chamber outlet so that a closed gas flow envelope is produced.
  • the chamber longitudinal axis preferably extends in a direction substantially parallel to the jet axis of the liquid jet.
  • At least one chamber boundary is formed concentrically to the jet axis of the liquid jet, so that it is possible to produce an annular gas stream envelope.
  • the chamber is substantially frusto-conical.
  • the angle between a truncated cone lateral surface and the jet axis of the liquid jet is between 10 ° and 60 °.
  • the housing comprises a first housing part for arranging the liquid discharge device and a second housing part which delimits at least a portion of the chamber and which can be connected or connected to the first housing part.
  • the first housing part comprises an inlet for liquid which can be supplied to the liquid chamber inlet.
  • At least one of the housing parts comprises at least one inlet for a gas, which is the at least one gas chamber inlet can be fed.
  • the invention further relates to a method for deburring and / or cleaning a workpiece, in which the workpiece is immersed in a liquid medium and exposed to a pressurized liquid jet.
  • the invention is based on the further object of providing a method for deburring and / or cleaning a workpiece, which enables particularly efficient deburring and / or cleaning of a workpiece.
  • the chamber exit of the chamber is positioned at a distance of at most about 5 cm relative to a surface of the workpiece to be deburred and / or cleaned.
  • the distance is at most about 3 cm, preferably about 1 cm.
  • the device according to the invention are particularly suitable for carrying out the method according to the invention.
  • One in the Fig. 1 illustrated, as a whole with 100 designated device for deburring and / or cleaning a workpiece comprises a container 102 which contains a liquid medium 104.
  • the liquid medium 104 is, for example, water.
  • the container 102 is dimensioned so that a workpiece 106 to be deburred and / or cleaned can be immersed in the liquid medium 104 at least in sections.
  • the container 102 also serves to receive a housing 108, which is preferably multi-part and in particular comprises a first housing part 110 and a second housing part 112.
  • the housing 108 is used to hold a liquid discharge device 114 for generating a liquid jet 116.
  • the housing 108 further serves to hold a gas discharge device 118 for generating a liquid jet 116 at least partially enclosing the gas stream 120th
  • the device 100 comprises a liquid supply device 122, indicated by a dot-dash line, by means of which a high pressure-pressurized liquid, in particular water and / or oil and / or emulsion, can be supplied to the housing 108.
  • the liquid supply device 122 comprises a high-pressure pump, not shown in the drawing, and a liquid supply line which supplies liquid to the housing 108.
  • the device 100 further comprises a gas supply device 124 indicated by a dot-dash line, by means of which a gas, in particular air, can be supplied to the housing 108.
  • the gas supply device 124 comprises a compressor or compressor, not shown in the drawing, and a gas supply line, which supplies gas to the housing 108.
  • the first housing part 110 has an inlet 126 for a high-pressure fluid, which can be supplied via a line 128 to a nozzle body 130.
  • the nozzle body 130 comprises a nozzle 132 with a reduced cross section of the line 128 nozzle cross-section.
  • the second housing part 112 is detachably connected to the first housing part 110 with the aid of connecting elements, for example screws, not shown for reasons of clarity. Furthermore, the second housing part 112 is sealed in a fluid-tight manner with respect to the first housing part 110 by means of a sealing element 133, which is embodied, for example, in the form of an O-ring.
  • the second housing part 112 comprises a chamber 134, which is preferably frusto-conical.
  • the chamber 134 comprises a peripheral chamber boundary surface 136 in the form of a truncated cone shell.
  • the peripheral chamber boundary surface 136 extends between a substantially flat end chamber boundary surface 138, which is formed by an end face of the first housing part 110, and a chamber outlet 140.
  • the chamber cross-section taken perpendicular to the chamber longitudinal axis 141 tapers from the front-side chamber boundary surface 138 in the direction of the chamber outlet 140.
  • the distance between the front-side chamber boundary surface 138 and the chamber outlet 140 is for example about 2 cm.
  • the second housing part 112 may also be referred to as a "jacket nozzle".
  • the second housing part 112 has an inlet 142 for a gas provided by the gas supply device 124.
  • the inlet 142 preferably has a size standardized compressed air connection, for example, the size R1 / 4 inches.
  • the inlet 142 is in fluid communication with a gas conduit 144.
  • the gas conduit 144 terminates at a gas chamber inlet 146 for entry of the gas into the chamber 134.
  • the chamber 134 further includes a liquid inlet 148 formed through an exit of the nozzle 132.
  • a gas stream 120 is generated which at least partially envelopes the liquid jet 116.
  • gas is supplied to the input 142 of the second housing part 112 by means of the gas supply device 124 and this gas is introduced via the gas line 144 and the gas chamber inlet 146 into the chamber 134. The introduced into the chamber 134 gas is pressurized.
  • This pressure is preferably higher than the sum of a pressure applied in an environment 156 of the device 100 and the hydrostatic pressure at the level of the gas flow 120, which is determined by an immersion depth 158 which is between the level of the gas flow 120 and the surface of the liquid medium 104 ("bath level").
  • the chamber exit 140 is so large that the liquid jet 116 can be supplied from the liquid chamber inlet 148 through the chamber 134 to the chamber outlet 140 without the liquid jet 116 contacting the peripheral chamber boundary surface 136.
  • an annular gap 160 At the level of the chamber outlet 140 remains between the periphery of the liquid jet 116 and the peripheral chamber boundary surface 136, an annular gap 160, which allows the discharge of the gas introduced into the chamber 134 through the chamber exit 140 in the direction of the workpiece 106.
  • the peripheral closed, shell-shaped gas flow 120 is generated, which prevents a friction-induced deceleration of the liquid jet 116 in the liquid medium 104.
  • the housing 108 and the workpiece 106 are positioned relative to one another such that the distance between the chamber exit 140 and the surface 154 of the workpiece 106 to be deburred and / or cleaned is at a maximum about 3 cm, preferably about 1 cm.
  • the distance between the exit of the nozzle 132 and the liquid chamber entrance 148 on the one hand and the surface 154 of the workpiece 106 to be cleaned on the other hand is for example at most about 10 cm, preferably at most about 5 cm, in particular between about 2 cm and about 3 cm.
  • the gas introduction direction 162 can run radially or tangentially to the jet axis 150.
  • the gas is introduced into the chamber 134 by means of a single gas chamber inlet 146.
  • at least one further gas chamber inlet 164 is provided, which is arranged, for example, on a side opposite the gas chamber inlet 146 side of the peripheral chamber boundary surface 136 and in Fig. 1 indicated by dash-dotted lines.
  • An in Fig. 2 illustrated second embodiment of a device 100 for deburring and / or cleaning a immersed in a liquid medium 104 workpiece 106 differs from the in Fig. 1 illustrated first embodiment in that the second embodiment has a gas chamber inlet 202, which is arranged together with the liquid chamber inlet 148 on the front-side chamber boundary surface 138.
  • the gas chamber inlet 202 is fed by means of a gas line 204, which is arranged in the first housing part 110.
  • the gas line 204 communicates with the gas supply device 124 via an input 206.
  • a gas in at least approximately parallel direction 208 to the jet axis 150 of the liquid jet 116 can be introduced into the chamber 134.
  • the gas introduced into the chamber 134 flows along the peripheral chamber boundary surface 136 to the chamber exit 140 where it exits the chamber 134 via the annular gap 160 and forms the envelope-shaped gas flow 120.
  • a single gas chamber inlet 202 may be provided and or at least one further gas chamber inlet 210, which in Fig. 2 indicated by a dot-dash line.
  • the gas chamber inlets 202 and 210 are disposed on opposite sides of the liquid chamber entrance 148 and are preferably at the same distance from the liquid chamber entrance 148.
  • Another, not shown in the drawing embodiment of an apparatus for deburring and / or cleaning a immersed in a liquid medium workpiece comprises both at least one gas chamber inlet 146, by means of which a gas in an inclined against the jet axis 150 of the liquid jet 116 gas introduction direction 162 into the chamber 134 is insertable, as well as at least one gas chamber inlet 202, by means of which a gas is introduced into the chamber 134 substantially parallel to the jet axis 150 of the liquid jet 116.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

In order to produce a particularly efficient device for deburring and/or cleaning a work piece that is dipped in a fluid medium comprising a fluid discharge device for producing a high pressure fluid jet, it is proposed that the device should comprise a gas discharge device for the production of a gas flow which at least partially envelops the fluid jet.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Entgratung und/oder Reinigung eines in ein flüssiges Medium eingetauchten Werkstücks, umfassend eine Flüssigkeitsaustragsvorrichtung zur Erzeugung eines hochdruckbeaufschlagten Flüssigkeitsstrahls.The present invention relates to a device for deburring and / or cleaning a workpiece immersed in a liquid medium, comprising a liquid discharge device for producing a high-pressure-loaded liquid jet.

Eine solche Vorrichtung eignet sich besonders gut zur Entgratung und/oder Reinigung von mechanisch, insbesondere spanend, bearbeiteten Werkstücken. Durch Beaufschlagung eines Werkstücks mit einem hochdruckbeaufschlagten Flüssigkeitsstrahl können Grate und/oder Verunreinigungen von dem Werkstück abgetrennt werden.Such a device is particularly well suited for deburring and / or cleaning of mechanically, in particular machined, machined workpieces. By subjecting a workpiece to a high pressure fluid jet, burrs and / or contaminants may be separated from the workpiece.

Die GB 2 078 546 A offenbart eine Vorrichtung zum Reinigen von Unterwasserstrukturen, beispielsweise Ölbohrinseln, welche eine Flüssigkeitsaustragsvorrichtung zur Erzeugung eines hochdruckbeaufschlagten Flüssigkeitsstrahls und eine Gasaustragsvorrichtung zur Erzeugung eines den Flüssigkeitsstrahl umhüllenden Gasstroms umfasst. Ferner umfasst die Vorrichtung eine Rückstoßstrahl-Anordnung, welche ebenfalls eine Flüssigkeitsaustragsvorrichtung zur Erzeugung eines hochdruckbeaufschlagten Flüssigkeitsstrahls und eine Gasaustragsvorrichtung zur Erzeugung eines den Flüssigkeitsstrahl umhüllenden Gasstroms umfasst.The GB 2 078 546 A discloses a device for cleaning underwater structures, such as oil rigs, which comprises a liquid discharge device for generating a high pressure fluid jet and a gas discharge device for generating a gas flow surrounding the liquid jet. Furthermore, the device comprises a recoil jet arrangement, which likewise comprises a liquid discharge device for producing a high-pressure-loaded liquid jet and a gas discharge device for producing a gas stream enclosing the liquid jet.

Die WO 02/44020 A1 offenbart eine Vorrichtung zum Reinigen von in Wasser eingetauchten Bootsrümpfen, welche eine Flüssigkeitsaustragsvorrichtung zur Erzeugung eines hochdruckbeaufschlagten Flüssigkeitsstrahls und eine Gasaustragsvorrichtung zur Erzeugung eines Volumens, in welchem die Dichte geringer ist als in dem umgebenden Wasser, umfasst, wobei der hochdruckbeaufschlagte Flüssigkeitsstrahl durch dieses Volumen geringerer Dichte hindurchtritt.The WO 02/44020 A1 discloses a device for cleaning boat hulls submerged in water comprising a liquid discharge device for generating a high pressure fluid jet and a gas discharge device for generating a volume in which the density is lower than in the surrounding water, the high pressure liquid jet being forced through this lower density volume passes.

Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, eine Vorrichtung zur Entgratung und/oder Reinigung eines in ein flüssiges Medium eingetauchten Werkstücks zu schaffen, welche besonders effizient ist.The present invention is based on the object to provide a device for deburring and / or cleaning a immersed in a liquid medium workpiece, which is particularly efficient.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung nach Anspruch 1 gelöst.This object is achieved by a device according to claim 1.

Die erfindungsgemäße Vorrichtung ermöglicht es, einen Gasstrom bereitzustellen, welcher den Flüssigkeitsstrahl gegenüber dem flüssigen Medium zumindest abschnittsweise abschirmt, so dass die Reibung zwischen dem Flüssigkeitsstrahl und dem flüssigen Medium erheblich reduziert werden kann. Hierdurch wir erreicht, dass der Flüssigkeitsstrahl während seiner Bewegung durch das flüssige Medium hindurch in Richtung auf das Werkstück nicht oder nur geringfügig abgebremst wird. Dies hat den Vorteil, dass ein mit der erfindungsgemäßen Vorrichtung erzeugter Flüssigkeitsstrahl bei Aufprall auf eine Werkstückoberfläche eine höhere kinetische Energie aufweist als dies bei aus dem Stand der Technik bekannten Vorrichtungen der Fall ist. Hierdurch kann die Entgrat- und/oder Reinigungswirkung verbessert werden. Alternativ oder zusätzlich hierzu kann der Flüssigkeitsstrahl mit einem niedrigeren Druck beaufschlagt werden, wodurch der Energieverbrauch der erfindungsgemäßen Vorrichtung gegenüber aus dem Stand der Technik bekannten Vorrichtungen bei identischer Entgrat- und/oder Reinigungswirkung reduziert wird.The device according to the invention makes it possible to provide a gas stream which at least partially shields the liquid jet from the liquid medium, so that the friction between the liquid jet and the liquid medium can be considerably reduced. This ensures that the liquid jet during its movement through the liquid medium in the direction of the workpiece is not or only slightly slowed down. This has the advantage that a liquid jet generated by the device according to the invention has a higher kinetic energy upon impact with a workpiece surface than is the case with devices known from the prior art. This can the deburring and / or cleaning effect can be improved. Alternatively or additionally, the liquid jet can be subjected to a lower pressure, whereby the energy consumption of the device according to the invention compared with devices known from the prior art is reduced with identical deburring and / or cleaning action.

Die Flüssigkeitsaustragsvorrichtung umfasst in vorteilhafter Weise eine Düse oder Hochdruckdüse. Eine solche Düse ermöglicht es, eine hochdruckbeaufschlagte Flüssigkeit aus der Flüssigkeitsaustragsvorrichtung auszutragen und dabei einen Flüssigkeitsstrahl zu formen. Durch entsprechende Anpassung der Geometrie der Düse kann ein Flüssigkeitsstrahl erzeugt werden, welcher ein im Wesentlichen kreisförmiges Vollstrahlprofil aufweist, oder ein Flachstrahlprofil, welches länglich oder elliptisch ist.The liquid discharge device advantageously comprises a nozzle or high-pressure nozzle. Such a nozzle makes it possible to discharge a high pressurized liquid from the liquid discharge device, thereby forming a liquid jet. By appropriate adaptation of the geometry of the nozzle, a liquid jet can be generated, which has a substantially circular solid beam profile, or a flat beam profile, which is elongated or elliptical.

Für eine möglichst hohe Entgrat- und/oder Reinigungswirkung ist es bevorzugt, wenn der Strahlwinkel des Flüssigkeitsstrahls möglichst klein ist. Unter einem Strahlwinkel wird der Winkel zwischen einander gegenüberliegenden umfangsseitigen Begrenzungen des Flüssigkeitsstrahls verstanden. Vorzugsweise beträgt der Strahlwinkel höchstens ungefähr 25°, insbesondere höchstens ungefähr 15°.For the highest possible deburring and / or cleaning effect, it is preferred if the jet angle of the liquid jet is as small as possible. A beam angle is understood to mean the angle between opposing peripheral boundaries of the liquid jet. Preferably, the beam angle is at most about 25 °, in particular at most about 15 °.

Die erfindungsgemäße Vorrichtung hat den weiteren Vorteil, dass mit Hilfe des Gasstroms im Bereich der Flüssigkeitsaustragsvorrichtung ein unmittelbarer Kontakt der aus einer Düse austretenden Flüssigkeit mit dem flüssigen Medium und hierdurch bedingte Kavitationsschäden der Düse verhindert werden können.The device according to the invention has the further advantage that, with the aid of the gas flow in the region of the liquid discharge device, direct contact of the liquid emerging from a nozzle with the liquid medium and resulting cavitation damage to the nozzle can be prevented.

Die erfindungsgemäße Vorrichtung ermöglicht es, mit einem geringen Energieeinsatz eine hohe Entgrat- und/oder Reinigungswirkung zu erzielen. Darüber hinaus ermöglicht es die erfindungsgemäße Vorrichtung, ein Werkstück besonders geräuscharm und emissionsarm zu entgraten und/oder zu reinigen. Der Gasstrom ermöglicht eine Schallentkopplung des hochdruckbeaufschlagten Flüssigkeitsstrahls einerseits und des flüssigen Mediums andererseits. Mit Hilfe des Gasstroms wird außerdem eine Wechselwirkung zwischen dem Flüssigkeitsstrahl und dem flüssigen Medium reduziert, so dass die Entstehung eines Flüssigkeitsnebels zumindest weitestgehend verhindert werden kann. Dementsprechend ermöglicht es die erfindungsgemäße Vorrichtung, auf externe Absauganlagen verzichten zu können oder entsprechende Absauganlagen sehr klein dimensionieren zu können.The device according to the invention makes it possible to achieve a high deburring and / or cleaning effect with a low energy input. In addition, the device according to the invention makes it possible to deburr and / or clean a workpiece with particularly low noise and low emissions. The gas flow allows a sound decoupling of the high pressure Liquid jet on the one hand and the liquid medium on the other. With the help of the gas flow also an interaction between the liquid jet and the liquid medium is reduced, so that the formation of a liquid mist can be at least largely prevented. Accordingly, the device according to the invention makes it possible to dispense with external extraction systems or to be able to dimension corresponding extraction systems very small.

Bei dem flüssigen Medium, in welches das Werkstück eingetaucht ist, handelt es sich vorzugsweise um ein flüssiges Reinigungsmedium, beispielsweise um Wasser.In the liquid medium in which the workpiece is immersed, it is preferably a liquid cleaning medium, for example, water.

Zur Aufnahme des flüssigen Mediums ist vorzugsweise ein Behälter, beispielsweise in Form eines Tanks, vorgesehen, dessen Behältervolumen zwischen wenigen Litern und mehreren Kubikmetern betragen kann. Zur Entgratung und/oder Reinigung eines Werkstücks ist es nicht erforderlich, dass dieses vollständig in das flüssige Medium eingetaucht ist; es genügt, dass der Flüssigkeitsstrahl und der Gasstrom einem Werkstückabschnitt zuführbar sind, welcher in das flüssige Medium eingetaucht ist.For receiving the liquid medium, a container, for example in the form of a tank, is preferably provided, the container volume of which may be between a few liters and several cubic meters. For deburring and / or cleaning a workpiece, it is not necessary that this is completely immersed in the liquid medium; it is sufficient that the liquid jet and the gas stream can be fed to a workpiece section which is immersed in the liquid medium.

Bei der hochdruckbeaufschlagten Flüssigkeit handelt es sich vorzugsweise um Wasser und/oder Öl und/oder eine Emulsion.The high-pressure liquid is preferably water and / or oil and / or an emulsion.

Die Flüssigkeit wird vorzugsweise mit einem Hochdruck von größer als ungefähr 100 bar beaufschlagt. Insbesondere wird die Flüssigkeit mit einem Druck beaufschlagt, welcher zwischen 300 bar und 2700 bar beträgt, insbesondere zwischen 500 bar und 2500 bar.The liquid is preferably applied with a high pressure of greater than about 100 bar. In particular, the liquid is subjected to a pressure which is between 300 bar and 2700 bar, in particular between 500 bar and 2500 bar.

Zur Erzeugung des Hochdrucks ist vorzugsweise eine Hochdruckpumpe vorgesehen, mittels welcher der Flüssigkeitsaustragsvorrichtung hochdruckbeaufschlagte Flüssigkeit zuführbar ist.To generate the high pressure, a high pressure pump is preferably provided, by means of which the liquid discharge device can be supplied with high pressure fluid.

Vorzugsweise ist der Gasstrom ein Luftstrom. Dies hat den Vorteil, dass ein Werkstück emissionsfrei entgratet und/oder gereinigt werden kann.Preferably, the gas stream is an air stream. This has the advantage that a workpiece can be deburred and / or cleaned free of emissions.

Der Gasstrom umhüllt zumindest einen Teil des Umfangs des Flüssigkeitsstrahls. Besonders bevorzugt ist es, wenn der Umfang des Flüssigkeitsstrahls vollständig von dem Gasstrom umhüllt ist.The gas stream envelops at least part of the circumference of the liquid jet. It is particularly preferred if the circumference of the liquid jet is completely enveloped by the gas stream.

Nach einer vorteilhaften Ausführungsform der Erfindung ist der Gasstrom mit einem Druck beaufschlagbar. Eine solche Druckbeaufschlagung hat den Vorteil, dass ein Kollabieren der Gasstromhülle, welche den Flüssigkeitsstrahl zumindest abschnittsweise umgibt, verhindert wird. Beispielsweise kann zur Erzeugung des Gasstroms Druckluft verwendet werden.According to an advantageous embodiment of the invention, the gas stream can be acted upon by a pressure. Such a pressurization has the advantage that a collapse of the gas flow envelope, which surrounds the liquid jet at least in sections, is prevented. For example, compressed air can be used to generate the gas flow.

Besonders bevorzugt ist es, wenn der Gasstrom mit einem Druck beaufschlagbar ist, welcher zumindest der Summe des Umgebungsdrucks der Vorrichtung und des auf Höhe des Gasstroms wirkenden hydrostatischen Drucks des flüssigen Mediums entspricht. Beispielsweise beträgt der Druck des Gasstroms bei einem Umgebungsdruck von 1 bar und bei einer Eintauchtiefe von 1 m mindestens ungefähr 1,1 bar. Im Vergleich zur Hochdruckbeaufschlagung der Flüssigkeit genügt es also, den Gasstrom mit einem niedrigen Druck zu beaufschlagen, welcher beispielsweise maximal ungefähr 10 bar beträgt.It is particularly preferred if the gas flow can be acted upon by a pressure which corresponds at least to the sum of the ambient pressure of the device and of the hydrostatic pressure of the liquid medium acting at the level of the gas flow. For example, the pressure of the gas stream at an ambient pressure of 1 bar and at an immersion depth of 1 m at least about 1.1 bar. Compared to the high-pressure admission of the liquid, it is therefore sufficient to pressurize the gas stream with a low pressure, which is for example a maximum of about 10 bar.

Die erfindungsgemäße Vorrichtung umfasst ein Gehäuse mit einer Kammer, welche mindestens einen Flüssigkeits-Kammereingang für den Eintritt von hochdruckbeaufschlagter Flüssigkeit in die Kammer, mindestens einen Gas-Kammereingang für den Eintritt von Gas in die Kammer und mindestens einen Kammerausgang für den Austritt des hochdruckbeaufschlagten Flüssigkeitsstrahls und des Gasstroms aufweist. Eine solche Kammer ermöglicht es, hochdruckbeaufschlagte Flüssigkeit und Gas separat voneinander in die Kammer einzuleiten und gemeinsam aus der Kammer herauszuleiten, und zwar derart, dass der Gasstrom den Flüssigkeitsstrahl zumindest abschnittsweise umhüllt.The device according to the invention comprises a housing having a chamber which has at least one liquid chamber inlet for the admission of high pressure fluid in the chamber, at least one gas chamber inlet for the entry of gas into the chamber and at least one chamber outlet for the outlet of the high pressure fluid jet and of the gas stream. Such a chamber makes it possible to introduce high pressure-pressurized liquid and gas separately from one another into the chamber and to conduct it out of the chamber together, in such a way that the gas stream at least partially envelops the liquid jet.

Vorzugsweise umfasst die Kammer genau einen Flüssigkeits-Kammereingang und/oder genau einen Kammerausgang.Preferably, the chamber comprises exactly one liquid chamber inlet and / or exactly one chamber outlet.

Nach einer vorteilhaften Ausführungsform der Erfindung ist zumindest ein Teil des Gases im Wesentlichen parallel zur Strahlachse des Flüssigkeitsstrahls in die Kammer einführbar. Hierdurch kann in einfacher Weise eine Gasstromhülle erzeugt werden.According to an advantageous embodiment of the invention, at least part of the gas can be introduced into the chamber substantially parallel to the jet axis of the liquid jet. As a result, a gas flow envelope can be generated in a simple manner.

Vorzugsweise sind der Flüssigkeits-Kammereingang und der mindestens eine Gas-Kammereingang an derselben Kammer-Begrenzungsfläche angeordnet, so dass das Gas und die Flüssigkeit in besonders einfacher Weise in zueinander im Wesentlichen paralleler Richtung in die Kammer einführbar sind.Preferably, the liquid chamber inlet and the at least one gas chamber inlet are arranged on the same chamber boundary surface, so that the gas and the liquid can be introduced into the chamber in a particularly simple manner in mutually substantially parallel direction.

Nach einer Ausführungsform der Erfindung sind mehrere Gas-Kammereingänge vorgesehen. Diese sind insbesondere in Umfangsrichtung um den Flüssigkeits-Kammereingang verteilt und vorzugsweise äquidistant zueinander angeordnet. Mit Hilfe mehrerer Gas-Kammereingänge ist es möglich, ein Gas insbesondere gleichmäßig verteilt in die Kammer einzuleiten.According to one embodiment of the invention, a plurality of gas chamber entrances are provided. These are distributed in particular in the circumferential direction around the liquid chamber inlet and preferably arranged equidistant from each other. With the help of several gas chamber entrances, it is possible to introduce a gas in particular evenly distributed in the chamber.

Nach einer weiteren Ausführungsform der Erfindung ist vorgesehen, dass der Gas-Kammereingang ringförmig ist und vorzugsweise konzentrisch zu einer Strahlachse des Flüssigkeitsstrahls angeordnet ist. Hierdurch ist eine besonders gleichmäßige Einleitung eines Gases in die Kammer ermöglicht.According to a further embodiment of the invention it is provided that the gas chamber inlet is annular and is preferably arranged concentrically to a jet axis of the liquid jet. This allows a particularly uniform introduction of a gas into the chamber.

Nach einer weiteren vorteilhaften Ausführungsform der Erfindung ist zumindest ein Teil des Gases in einer gegen die Strahlachse des Flüssigkeitsstrahls geneigten Gas-Einführrichtung in die Kammer einführbar. Dies unterstützt die Erzeugung eines hüllenförmigen Gasstroms, welcher den Flüssigkeitsstrahl zumindest abschnittsweise umgibt.According to a further advantageous embodiment of the invention, at least part of the gas can be introduced into the chamber in a gas introduction direction inclined to the jet axis of the liquid jet. This supports the generation of a shell-shaped gas flow which at least partially surrounds the liquid jet.

In vorteilhafter Weise sind der Flüssigkeits-Kammereingang und mindestens ein Gas-Kammereingang an unterschiedlichen Kammer-Begrenzungsflächen angeordnet. Dies ermöglicht es in besonders einfacher Weise, zumindest einen Teil des Gases in einer gegen die Strahlachse des Flüssigkeitsstrahls geneigten Richtung in die Kammer einzuführen.Advantageously, the liquid chamber inlet and at least one gas chamber entrance to different chamber boundary surfaces arranged. This makes it possible in a particularly simple manner to introduce at least a portion of the gas in a direction inclined to the jet axis of the liquid jet in the direction of the chamber.

Nach einer Ausführungsform der Erfindung ist die Eintrittsrichtung des Gases in die Kammer senkrecht, insbesondere radial zu der Strahlachse des Flüssigkeitsstrahls. Dies ermöglicht die Erzeugung einer umfangseitig geschlossenen Gasstromhülle.According to one embodiment of the invention, the direction of entry of the gas into the chamber is perpendicular, in particular radially to the jet axis of the liquid jet. This allows the generation of a circumferentially closed gas flow envelope.

Nach einer weiteren Ausführungsform der Erfindung ist die Eintrittsrichtung des Gases in die Kammer tangential zu der Strahlachse des Flüssigkeitsstrahls. Auf diese Weise kann innerhalb der Kammer eine Wirbelbildung unterstützt werden, um eine Gasstromhülle zu formen, welche den Flüssigkeitsstrahl umgibt.According to a further embodiment of the invention, the direction of entry of the gas into the chamber is tangential to the jet axis of the liquid jet. In this way, vortex formation can be promoted within the chamber to form a gas flow envelope surrounding the fluid jet.

Beispielsweise kann zumindest ein Teil des Gases in einer bezogen auf die Schwerkraftrichtung vertikalen Richtung, also von oben und/oder von unten her, in die Kammer eingeführt werden.For example, at least a portion of the gas in a direction relative to the direction of gravity vertical direction, ie from above and / or from below, are introduced into the chamber.

Auch bei Einführung zumindest eines Teils des Gases in einer gegen die Strahlachse des Flüssigkeitsstrahles geneigten Richtung in die Kammer können mehrere Gas-Kammereingänge und/oder ein ringförmiger Gas-Kammereingang vorgesehen sein.Even if at least a portion of the gas is introduced into the chamber in a direction inclined to the jet axis of the liquid jet, a plurality of gas chamber inlets and / or an annular gas chamber inlet may be provided.

Die Kammer weist einen senkrecht zur Kammerlängsachse genommenen Kammerquerschnitt auf, welcher sich zu dem Kammerausgang hin verjüngt. Dies ermöglicht es, das Gas in Richtung auf den Kammerausgang hin so zu führen, dass eine umfangseitig geschlossene Gasstromhülle erzeugt wird.The chamber has a chamber cross-section taken perpendicular to the chamber longitudinal axis, which tapers towards the chamber outlet. This makes it possible to guide the gas in the direction of the chamber outlet so that a closed gas flow envelope is produced.

Die Kammerlängsachse erstreckt sich vorzugsweise in zur Strahlachse des Flüssigkeitsstrahls im Wesentlichen paralleler Richtung. Insbesondere fluchten die Kammerlängsachse und die Strahlachse des Flüssigkeitsstrahls miteinander. Hierdurch kann eine kompakte Gasaustragsvorrichtung geschaffen werden.The chamber longitudinal axis preferably extends in a direction substantially parallel to the jet axis of the liquid jet. In particular, cursing the chamber longitudinal axis and the beam axis of the liquid jet with each other. As a result, a compact gas discharge device can be provided.

Besonders bevorzugt ist es, wenn mindestens eine Kammer-Begrenzung konzentrisch zu der Strahlachse des Flüssigkeitsstrahls ausgebildet ist, so dass sich eine kreisringförmige Gasstromhülle erzeugen lässt.It is particularly preferred if at least one chamber boundary is formed concentrically to the jet axis of the liquid jet, so that it is possible to produce an annular gas stream envelope.

Insbesondere ist die Kammer im Wesentlichen kegelstumpfförmig. Vorzugsweise beträgt der Winkel zwischen einer Kegelstumpf-Mantelfläche und der Strahlachse des Flüssigkeitsstrahls zwischen 10° und 60°.In particular, the chamber is substantially frusto-conical. Preferably, the angle between a truncated cone lateral surface and the jet axis of the liquid jet is between 10 ° and 60 °.

In vorteilhafter Weise umfasst das Gehäuse ein erstes Gehäuseteil zur Anordnung der Flüssigkeitsaustragsvorrichtung und ein zweites Gehäuseteil, welches zumindest einen Abschnitt der Kammer begrenzt und welches mit dem ersten Gehäuseteil verbindbar oder verbunden ist. Dies ermöglicht eine besonders einfache Herstellung der Kammer, insbesondere wenn das erste Gehäuseteil und das zweite Gehäuseteil lösbar miteinander verbindbar oder verbunden sind.In an advantageous manner, the housing comprises a first housing part for arranging the liquid discharge device and a second housing part which delimits at least a portion of the chamber and which can be connected or connected to the first housing part. This allows a particularly simple production of the chamber, in particular when the first housing part and the second housing part are releasably connectable or connected to each other.

In vorteilhafter Weise umfasst das erste Gehäuseteil einen Eingang für Flüssigkeit, welche dem Flüssigkeits-Kammereingang zuführbar ist.Advantageously, the first housing part comprises an inlet for liquid which can be supplied to the liquid chamber inlet.

Bevorzugt ist es ferner, wenn mindestens eines der Gehäuseteile mindestens einen Eingang für ein Gas umfasst, welches dem mindestens einen Gas-Kammereingang zuführbar ist.It is further preferred if at least one of the housing parts comprises at least one inlet for a gas, which is the at least one gas chamber inlet can be fed.

Die Erfindung betrifft ferner ein Verfahren zur Entgratung und/oder Reinigung eines Werkstücks, bei dem das Werkstück in ein flüssiges Medium eingetaucht und einem druckbeaufschlagten Flüssigkeitsstrahl ausgesetzt wird.The invention further relates to a method for deburring and / or cleaning a workpiece, in which the workpiece is immersed in a liquid medium and exposed to a pressurized liquid jet.

Der Erfindung liegt die weitere Aufgabe zu Grunde, ein Verfahren zur Entgratung und/oder Reinigung eines Werkstücks zu schaffen, welches eine besonders effiziente Entgratung und/oder Reinigung eines Werkstücks ermöglicht.The invention is based on the further object of providing a method for deburring and / or cleaning a workpiece, which enables particularly efficient deburring and / or cleaning of a workpiece.

Diese Aufgabe wird durch ein Verfahren zur Entgratung und/oder Reinigung eines Werkstücks nach Anspruch 7 gelöst.This object is achieved by a method for deburring and / or cleaning a workpiece according to claim 7.

Besondere Ausgestaltungen und Vorteile des erfindungsgemäßen Verfahrens sind zum Teil bereits vorstehend im Zusammenhang mit den besonderen Ausgestaltungen und den Vorteilen der erfindungsgemäßen Vorrichtung erläutert worden. Daher wird im Folgenden nur noch auf jene Ausgestaltungen und Vorteile des erfindungsgemäßen Verfahrens eingegangen, die nicht bereits vorstehend erläutert wurden.Special refinements and advantages of the method according to the invention have in part already been explained above in connection with the particular embodiments and the advantages of the device according to the invention. Therefore, in the following only those embodiments and advantages of the method according to the invention will be discussed that have not already been explained above.

In vorteilhafter Weise wird zur Entgratung und/oder Reinigung des Werkstücks der Kammerausgang der Kammer in einem Abstand von höchstens ungefähr 5 cm relativ zu einer zu entgratenden und/oder zu reinigenden Oberfläche des Werkstücks positioniert. Insbesondere beträgt der Abstand höchstens ungefähr 3 cm, vorzugsweise ungefähr 1 cm. Die genannten Abstände ermöglichen es, den Flüssigkeitsstrahl gemeinsam mit dem ihn zumindest abschnittsweise umhüllenden Gasstrom dem zu entgratenden und/oder zu reinigenden Werkstück zuzuführen, ohne dass die Gasstromhülle kollabiert. Die genannten Abstände ermöglichen es außerdem, die Flüssigkeitsaustragsvorrichtung und die Gasaustragsvorrichtung relativ zu dem Werkstück zu bewegen, ohne dass hierbei die Einhaltung kleinster Lagetoleranzen erforderlich wäre.Advantageously, for deburring and / or cleaning the workpiece, the chamber exit of the chamber is positioned at a distance of at most about 5 cm relative to a surface of the workpiece to be deburred and / or cleaned. In particular, the distance is at most about 3 cm, preferably about 1 cm. The abovementioned distances make it possible to supply the liquid jet, together with the gas stream enveloping it at least in sections, to the workpiece to be deburred and / or to be cleaned, without the gas flow sheath collapsing. The said distances also make it possible to move the Flüssigkeitsaustragsvorrichtung and Gasaustragsvorrichtung relative to the workpiece, without thereby compliance with the smallest tolerances would be required.

Die erfindungsgemäße Vorrichtung eignet sind insbesondere zur Durchführung des erfindungsgemäßen Verfahrens.The device according to the invention are particularly suitable for carrying out the method according to the invention.

Weitere Merkmale und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung und der zeichnerischen Darstellung bevorzugter Ausführungsbeispiele.Further features and advantages of the invention are the subject of the following description and the drawings of preferred embodiments.

In den Zeichnungen zeigen:

Fig. 1
einen schematischen Schnitt durch eine Vorrichtung gemäß einer ersten Ausführungsform zur Entgratung und/oder Reinigung eines in ein flüssiges Medium eingetauchten Werkstücks; und
Fig. 2
einen schematischen Schnitt durch eine Vorrichtung gemäß einer zweiten Ausführungsform zur Entgratung und/oder Reinigung eines in ein flüssiges Medium eingetauchten Werkstücks.
In the drawings show:
Fig. 1
a schematic section through an apparatus according to a first embodiment for deburring and / or cleaning a submerged in a liquid medium workpiece; and
Fig. 2
a schematic section through a device according to a second embodiment for deburring and / or cleaning a submerged in a liquid medium workpiece.

Gleiche oder funktional äquivalente Elemente sind in allen Figuren mit denselben Bezugszeichen bezeichnet.Identical or functionally equivalent elements are denoted by the same reference numerals in all figures.

Eine in der Fig. 1 dargestellte, als Ganzes mit 100 bezeichnete Vorrichtung zur Entgratung und/oder Reinigung eines Werkstücks umfasst einen Behälter 102, welcher ein flüssiges Medium 104 enthält. Das flüssige Medium 104 ist beispielsweise Wasser.One in the Fig. 1 illustrated, as a whole with 100 designated device for deburring and / or cleaning a workpiece comprises a container 102 which contains a liquid medium 104. The liquid medium 104 is, for example, water.

Der Behälter 102 ist so dimensioniert, dass ein zu entgratendes und/oder zu reinigendes Werkstück 106 zumindest abschnittsweise in das flüssige Medium 104 eingetaucht werden kann.The container 102 is dimensioned so that a workpiece 106 to be deburred and / or cleaned can be immersed in the liquid medium 104 at least in sections.

Der Behälter 102 dient außerdem zur Aufnahme eines Gehäuses 108, welches vorzugsweise mehrteilig ist und insbesondere ein erstes Gehäuseteil 110 und ein zweites Gehäuseteil 112 umfasst.The container 102 also serves to receive a housing 108, which is preferably multi-part and in particular comprises a first housing part 110 and a second housing part 112.

Das Gehäuse 108 dient zum Halten einer Flüssigkeitsaustragsvorrichtung 114 zur Erzeugung eines Flüssigkeitsstrahls 116. Das Gehäuse 108 dient ferner zum Halten einer Gasaustragsvorrichtung 118 zur Erzeugung eines den Flüssigkeitsstrahl 116 zumindest abschnittsweise umhüllenden Gasstroms 120.The housing 108 is used to hold a liquid discharge device 114 for generating a liquid jet 116. The housing 108 further serves to hold a gas discharge device 118 for generating a liquid jet 116 at least partially enclosing the gas stream 120th

Die Vorrichtung 100 umfasst eine mit einer strichpunktierten Linie angedeutete Flüssigkeitsversorgungseinrichtung 122, mittels welcher dem Gehäuse 108 eine hochdruckbeaufschlagte Flüssigkeit, insbesondere Wasser und/oder Öl und/oder Emulsion, zuführbar ist. Beispielsweise umfasst die Flüssigkeitsversorgungseinrichtung 122 eine in der Zeichnung nicht dargestellte Hochdruckpumpe und eine Flüssigkeitsversorgungsleitung, welche dem Gehäuse 108 Flüssigkeit zuführt.The device 100 comprises a liquid supply device 122, indicated by a dot-dash line, by means of which a high pressure-pressurized liquid, in particular water and / or oil and / or emulsion, can be supplied to the housing 108. For example, the liquid supply device 122 comprises a high-pressure pump, not shown in the drawing, and a liquid supply line which supplies liquid to the housing 108.

Die Vorrichtung 100 umfasst ferner eine mit einer strichpunktierten Linie angedeutete Gasversorgungseinrichtung 124, mittels welcher dem Gehäuse 108 ein Gas, insbesondere Luft, zuführbar ist. Beispielsweise umfasst die Gasversorgungseinrichtung 124 einen in der Zeichnung nicht dargestellten Verdichter oder Kompressor und eine Gasversorgungsleitung, welche dem Gehäuse 108 Gas zuführt.The device 100 further comprises a gas supply device 124 indicated by a dot-dash line, by means of which a gas, in particular air, can be supplied to the housing 108. For example, the gas supply device 124 comprises a compressor or compressor, not shown in the drawing, and a gas supply line, which supplies gas to the housing 108.

Das erste Gehäuseteil 110 weist einen Eingang 126 für eine hochdruckbeaufschlagte Flüssigkeit auf, welche über eine Leitung 128 einem Düsenkörper 130 zuführbar ist. Der Düsenkörper 130 umfasst eine Düse 132 mit einem gegenüber dem Querschnitt der Leitung 128 verkleinerten Düsenquerschnitt.The first housing part 110 has an inlet 126 for a high-pressure fluid, which can be supplied via a line 128 to a nozzle body 130. The nozzle body 130 comprises a nozzle 132 with a reduced cross section of the line 128 nozzle cross-section.

Das zweite Gehäuseteil 112 ist mit Hilfe von aus Gründen der Übersichtlichkeit nicht dargestellten Verbindungselementen, beispielsweise Schrauben, lösbar mit dem ersten Gehäuseteil 110 verbunden. Ferner ist das zweite Gehäuseteil 112 mittels eines Dichtungselements 133, welches beispielsweise in Form eines O-Rings ausgebildet ist, fluiddicht gegenüber dem ersten Gehäuseteil 110 abgedichtet.The second housing part 112 is detachably connected to the first housing part 110 with the aid of connecting elements, for example screws, not shown for reasons of clarity. Furthermore, the second housing part 112 is sealed in a fluid-tight manner with respect to the first housing part 110 by means of a sealing element 133, which is embodied, for example, in the form of an O-ring.

Das zweite Gehäuseteil 112 umfasst eine Kammer 134, welche vorzugsweise kegelstumpfförmig ist. Die Kammer 134 umfasst eine umfangsseitige Kammer-Begrenzungsfläche 136 in Form eines Kegelstumpfmantels. Die umfangsseitige Kammer-Begrenzungsfläche 136 erstreckt sich zwischen einer im Wesentlichen ebenen stirnseitigen Kammer-Begrenzungsfläche 138, welche durch eine Stirnseite des ersten Gehäuseteils 110 gebildet ist, und einem Kammerausgang 140. Der senkrecht zur Kammerlängsachse 141 genommene Kammerquerschnitt verjüngt sich von der stirnseitigen Kammer-Begrenzungsfläche 138 in Richtung auf den Kammerausgang 140. Der Abstand zwischen der stirnseitigen Kammer-Begrenzungsfläche 138 und dem Kammerausgang 140 beträgt beispielsweise ungefähr 2 cm. Das zweite Gehäuseteil 112 kann auch als "Manteldüse" bezeichnet werden.The second housing part 112 comprises a chamber 134, which is preferably frusto-conical. The chamber 134 comprises a peripheral chamber boundary surface 136 in the form of a truncated cone shell. The peripheral chamber boundary surface 136 extends between a substantially flat end chamber boundary surface 138, which is formed by an end face of the first housing part 110, and a chamber outlet 140. The chamber cross-section taken perpendicular to the chamber longitudinal axis 141 tapers from the front-side chamber boundary surface 138 in the direction of the chamber outlet 140. The distance between the front-side chamber boundary surface 138 and the chamber outlet 140 is for example about 2 cm. The second housing part 112 may also be referred to as a "jacket nozzle".

Das zweite Gehäuseteil 112 weist einen Eingang 142 für ein mittels der Gasversorgungseinrichtung 124 bereitgestelltes Gas auf. Der Eingang 142 weist vorzugsweise einen größengenormten Druckluftanschluss auf, beispielsweise der Größe R1/4 Zoll. Der Eingang 142 steht in fluidwirksamer Verbindung mit einer Gasleitung 144. Die Gasleitung 144 mündet an einem Gas-Kammereingang 146 für den Eintritt des Gases in die Kammer 134.The second housing part 112 has an inlet 142 for a gas provided by the gas supply device 124. The inlet 142 preferably has a size standardized compressed air connection, for example, the size R1 / 4 inches. The inlet 142 is in fluid communication with a gas conduit 144. The gas conduit 144 terminates at a gas chamber inlet 146 for entry of the gas into the chamber 134.

Die Kammer 134 weist ferner einen Flüssigkeits-Eingang 148 auf, welcher durch einen Ausgang der Düse 132 gebildet ist.The chamber 134 further includes a liquid inlet 148 formed through an exit of the nozzle 132.

Die vorstehend beschriebene Vorrichtung 100 funktioniert wie folgt:

  • Zur Vorbereitung der Entgratung und/oder Reinigung eines Werkstücks 106 wird der Behälter 102 mit einem flüssigen Medium 104 gefüllt. Anschließend werden das Werkstück 106 und das Gehäuse 108 in das flüssige Medium 104 eingetaucht. Zur Erzeugung eines hochdruckbeaufschlagten Flüssigkeitsstrahls 116 wird dem Gehäuse 108 mittels der Flüssigkeitsversorgungseinrichtung 122 eine hochdruckbeaufschlagte Flüssigkeit zugeführt. Die Flüssigkeit gelangt über den Eingang 126 und die Leitung 128 zu der Düse 132 und zu dem Flüssigkeits-Kammereingang 148. Die Flüssigkeit tritt an dem Flüssigkeits-Kammereingang 148 aus der Düse 132 aus und bildet den Flüssigkeitsstrahl 116. Der Flüssigkeitsstrahl 116 erstreckt sich entlang einer Strahlachse 150 und weist einen zwischen einander gegenüberliegenden umfangsseitigen Begrenzungen des Flüssigkeitsstrahls 116 gemessenen Strahlwinkel 152 auf, welcher beispielsweise ungefähr 10° beträgt.
The device 100 described above functions as follows:
  • To prepare the deburring and / or cleaning of a workpiece 106, the container 102 is filled with a liquid medium 104. Subsequently, the workpiece 106 and the housing 108 are immersed in the liquid medium 104. To produce a high-pressure-loaded liquid jet 116, the housing 108 is supplied with a high-pressure-loaded liquid by means of the liquid supply device 122. The liquid passes via the inlet 126 and the line 128 to the nozzle 132 and to the Liquid chamber entrance 148. The liquid exits the nozzle 132 at the liquid chamber entrance 148 and forms the liquid jet 116. The liquid jet 116 extends along a jet axis 150 and has a jet angle 152 measured between opposite circumferential boundaries of the liquid jet 116. which is for example about 10 °.

Um zu verhindern, dass der Flüssigkeitsstrahl 116 durch Reibung mit dem flüssigen Medium 104 abgebremst wird, bevor er auf eine zu entgratende und/oder zu reinigende Oberfläche 154 des Werkstücks 106 trifft, wird ein Gasstrom 120 erzeugt, welcher den Flüssigkeitsstrahl 116 zumindest abschnittsweise umhüllt. Hierfür wird mittels der Gasversorgungseinrichtung 124 dem Eingang 142 des zweiten Gehäuseteils 112 Gas zugeführt und dieses über die Gasleitung 144 und den Gas-Kammereingang 146 in die Kammer 134 eingeführt. Das in die Kammer 134 eingeführte Gas ist mit einem Druck beaufschlagt. Dieser Druck ist vorzugsweise höher als die Summe eines Drucks, der in einer Umgebung 156 der Vorrichtung 100 anliegt, und des hydrostatischen Drucks auf Höhe des Gasstroms 120, der durch eine Eintauchtiefe 158 bestimmt ist, welche zwischen dem Niveau des Gasstroms 120 und der Oberfläche des flüssigen Mediums 104 ("Badpegel") gemessen wird.In order to prevent the liquid jet 116 from being decelerated by friction with the liquid medium 104 before it encounters a surface 154 of the workpiece 106 to be deburred and / or cleaned, a gas stream 120 is generated which at least partially envelopes the liquid jet 116. For this purpose, gas is supplied to the input 142 of the second housing part 112 by means of the gas supply device 124 and this gas is introduced via the gas line 144 and the gas chamber inlet 146 into the chamber 134. The introduced into the chamber 134 gas is pressurized. This pressure is preferably higher than the sum of a pressure applied in an environment 156 of the device 100 and the hydrostatic pressure at the level of the gas flow 120, which is determined by an immersion depth 158 which is between the level of the gas flow 120 and the surface of the liquid medium 104 ("bath level").

Der Kammerausgang 140 ist so groß, dass der Flüssigkeitsstrahl 116 ausgehend von dem Flüssigkeits-Kammereingang 148 durch die Kammer 134 hindurch dem Kammerausgang 140 zugeführt werden kann, ohne dass der Flüssigkeitsstrahl 116 die umfangsseitige Kammer-Begrenzungsfläche 136 berührt. Auf Höhe des Kammerausgangs 140 verbleibt zwischen dem Umfang des Flüssigkeitsstrahls 116 und der umfangsseitigen Kammer-Begrenzungsfläche 136 ein Ringspalt 160, welcher den Austritt des in die Kammer 134 eingeführten Gases durch den Kammerausgang 140 hindurch in Richtung auf das Werkstück 106 ermöglicht. Hierdurch wird der umfangsseitig geschlossene, hüllenförmige Gasstrom 120 erzeugt, welcher ein reibungsbedingtes Abbremsen des Flüssigkeitsstrahls 116 in dem flüssigen Medium 104 verhindert.The chamber exit 140 is so large that the liquid jet 116 can be supplied from the liquid chamber inlet 148 through the chamber 134 to the chamber outlet 140 without the liquid jet 116 contacting the peripheral chamber boundary surface 136. At the level of the chamber outlet 140 remains between the periphery of the liquid jet 116 and the peripheral chamber boundary surface 136, an annular gap 160, which allows the discharge of the gas introduced into the chamber 134 through the chamber exit 140 in the direction of the workpiece 106. As a result, the peripheral closed, shell-shaped gas flow 120 is generated, which prevents a friction-induced deceleration of the liquid jet 116 in the liquid medium 104.

Für eine besonders gute Entgrat- und/oder Reinigungswirkung ist es vorteilhaft, wenn das Gehäuse 108 und das Werkstück 106 relativ zueinander so positioniert werden, dass der Abstand zwischen dem Kammerausgang 140 und der zu entgratenden und/oder zu reinigenden Oberfläche 154 des Werkstücks 106 maximal ungefähr 3 cm, vorzugsweise ungefähr 1 cm, beträgt.For a particularly good deburring and / or cleaning action, it is advantageous if the housing 108 and the workpiece 106 are positioned relative to one another such that the distance between the chamber exit 140 and the surface 154 of the workpiece 106 to be deburred and / or cleaned is at a maximum about 3 cm, preferably about 1 cm.

Der Abstand zwischen dem Ausgang der Düse 132 bzw. des Flüssigkeits-Kammereingangs 148 einerseits und der zu reinigenden Oberfläche 154 des Werkstücks 106 andererseits beträgt beispielsweise maximal ungefähr 10 cm, vorzugsweise maximal ungefähr 5 cm, insbesondere zwischen ungefähr 2 cm und ungefähr 3 cm.The distance between the exit of the nozzle 132 and the liquid chamber entrance 148 on the one hand and the surface 154 of the workpiece 106 to be cleaned on the other hand is for example at most about 10 cm, preferably at most about 5 cm, in particular between about 2 cm and about 3 cm.

Die Einführung des Gases in die Kammer 134 erfolgt mittels des Gas-Kammereingangs 146 in einer Gas-Einführrichtung 162, welche zu der Strahlachse des Flüssigkeitsstrahls 116 geneigt, insbesondere senkrecht ist. Die Gas-Einführrichtung 162 kann radial oder tangential zu der Strahlachse 150 verlaufen.The introduction of the gas into the chamber 134 by means of the gas chamber inlet 146 in a gas introduction direction 162, which is inclined to the beam axis of the liquid jet 116, in particular perpendicular. The gas introduction direction 162 can run radially or tangentially to the jet axis 150.

Es ist möglich, dass das Gas mittels eines einzigen Gas-Kammereingangs 146 in die Kammer 134 eingeführt wird. Alternativ hierzu ist es möglich, dass mindestens ein weiterer Gas-Kammereingang 164 vorgesehen ist, welcher beispielsweise auf einer dem Gas-Kammereingang 146 gegenüberliegenden Seite der umfangsseitigen Kammer-Begrenzungsfläche 136 angeordnet und in Fig. 1 strichpunktiert angedeutet ist.It is possible that the gas is introduced into the chamber 134 by means of a single gas chamber inlet 146. Alternatively, it is possible that at least one further gas chamber inlet 164 is provided, which is arranged, for example, on a side opposite the gas chamber inlet 146 side of the peripheral chamber boundary surface 136 and in Fig. 1 indicated by dash-dotted lines.

Eine in Fig. 2 dargestellte zweite Ausführungsform einer Vorrichtung 100 zur Entgratung und/oder Reinigung eines in ein flüssiges Medium 104 eingetauchten Werkstücks 106 unterscheidet sich von der in Fig. 1 dargestellten ersten Ausführungsform dadurch, dass die zweite Ausführungsform einen Gas-Kammereingang 202 aufweist, welcher gemeinsam mit dem Flüssigkeits-Kammereingang 148 an der stirnseitigen Kammer-Begrenzungsfläche 138 angeordnet ist.An in Fig. 2 illustrated second embodiment of a device 100 for deburring and / or cleaning a immersed in a liquid medium 104 workpiece 106 differs from the in Fig. 1 illustrated first embodiment in that the second embodiment has a gas chamber inlet 202, which is arranged together with the liquid chamber inlet 148 on the front-side chamber boundary surface 138.

Der Gas-Kammereingang 202 ist mittels einer Gasleitung 204 gespeist, welche in dem ersten Gehäuseteil 110 angeordnet ist. Die Gasleitung 204 kommuniziert über einen Eingang 206 mit der Gasversorgungseinrichtung 124.The gas chamber inlet 202 is fed by means of a gas line 204, which is arranged in the first housing part 110. The gas line 204 communicates with the gas supply device 124 via an input 206.

Mittels des Gas-Kammereingangs 202 kann ein Gas in zu der Strahlachse 150 des Flüssigkeitsstrahls 116 zumindest annähernd paralleler Richtung 208 in die Kammer 134 eingeführt werden. Das in die Kammer 134 eingeführte Gas strömt entlang der umfangsseitigen Kammer-Begrenzungsfläche 136 zu dem Kammerausgang 140 und tritt dort über den Ringspalt 160 aus der Kammer 134 aus und bildet den hüllenförmigen Gasstrom 120.By means of the gas chamber inlet 202, a gas in at least approximately parallel direction 208 to the jet axis 150 of the liquid jet 116 can be introduced into the chamber 134. The gas introduced into the chamber 134 flows along the peripheral chamber boundary surface 136 to the chamber exit 140 where it exits the chamber 134 via the annular gap 160 and forms the envelope-shaped gas flow 120.

Auch bei der zu der Strahlachse 150 des Flüssigkeitsstrahls 116 parallelen Einführung des Gases in die Kammer 134 kann ein einzelner Gas-Kammereingang 202 vorgesehen sein und oder mindestens ein weiterer Gas-Kammereingang 210, welcher in Fig. 2 mit einer strichpunktierten Linie angedeutet ist. Beispielsweise sind die Gas-Kammereingänge 202 und 210 auf einander gegenüberliegenden Seiten des Flüssigkeits-Kammereingangs 148 angeordnet und weisen vorzugsweise denselben Abstand zu dem Flüssigkeits-Kammereingang 148 auf.Even with the jet axis 150 of the liquid jet 116 parallel introduction of the gas into the chamber 134, a single gas chamber inlet 202 may be provided and or at least one further gas chamber inlet 210, which in Fig. 2 indicated by a dot-dash line. For example, the gas chamber inlets 202 and 210 are disposed on opposite sides of the liquid chamber entrance 148 and are preferably at the same distance from the liquid chamber entrance 148.

Im Übrigen stimmt die in Fig. 2 dargestellte zweite Ausführungsform der Vorrichtung 100 hinsichtlich Aufbau und Funktion mit der in Fig. 1 dargestellten ersten Ausführungsform überein, auf deren vorstehende Beschreibung insoweit Bezug genommen wird.Incidentally, the in Fig. 2 illustrated second embodiment of the device 100 in terms of structure and function with in Fig. 1 illustrated in the first embodiment, reference is made to the above description in this regard.

Eine weitere, in der Zeichnung nicht dargestellte Ausführungsform einer Vorrichtung zur Entgratung und/oder Reinigung eines in ein flüssiges Medium eingetauchten Werkstücks umfasst sowohl mindestens einen Gas-Kammereingang 146, mittels welchem ein Gas in einer gegen die Strahlachse 150 des Flüssigkeitsstrahls 116 geneigten Gas-Einführrichtung 162 in die Kammer 134 einführbar ist, als auch mindestens einen Gas-Kammereingang 202, mittels welchem ein Gas im Wesentlichen parallel zu der Strahlachse 150 des Flüssigkeitsstrahls 116 in die Kammer 134 einführbar ist.Another, not shown in the drawing embodiment of an apparatus for deburring and / or cleaning a immersed in a liquid medium workpiece comprises both at least one gas chamber inlet 146, by means of which a gas in an inclined against the jet axis 150 of the liquid jet 116 gas introduction direction 162 into the chamber 134 is insertable, as well as at least one gas chamber inlet 202, by means of which a gas is introduced into the chamber 134 substantially parallel to the jet axis 150 of the liquid jet 116.

Claims (11)

  1. A device (100) for deburring and/or cleaning a work piece (106) which is dipped in a fluid medium (104), comprising a fluid discharge device (114) for producing a high pressure fluid jet (116) and a gas discharge device (118) for the production of a gas flow (120) which at least partially envelops the fluid jet (116),
    wherein the device (100) comprises a housing (108) incorporating a chamber (134) which comprises at least one fluid inlet (148) to the chamber for the entry of high pressure fluid into the chamber (134), at least one gas inlet (146, 164, 202, 210) to the chamber for the entry of gas into the chamber (134) and at least one outlet (140) from the chamber for the exit of the high pressure fluid jet (116) and the gas flow (120),
    characterized in that
    a chamber cross section of the chamber (134) extending perpendicularly to the longitudinal axis (141) of the chamber tapers towards the outlet (140) from the chamber.
  2. A device (100) in accordance with Claim 1, characterized in that the gas flow (120) is arranged to be subjected to pressure.
  3. A device (100) in accordance with either of the Claims 1 or 2, characterized in that at least a part of the gas is arranged to be introduced into the chamber (134) substantially parallel to the jet axis (150) of the fluid jet (116).
  4. A device (100) in accordance with any of the Claims 1 to 3, characterized in that at least a part of the gas is arranged to be introduced into the chamber (134) in a gas entry direction (162) which is inclined with respect to the jet axis (150) of the fluid jet (116).
  5. A device (100) in accordance with any of the Claims 1 to 4, characterized in that the longitudinal axis (141) of the chamber runs substantially parallel to the jet axis (150) of the fluid jet (116).
  6. A device (100) in accordance with any of the Claims 1 to 5, characterized in that the housing (108) comprises a first housing part (110) for the disposition of the fluid discharge device (114) and a second housing part (112) which bounds at least a section of the chamber (134) and which is connected to or is connectable to the first housing part (110).
  7. A method for deburring and/or cleaning a work piece (106), in which the work piece (106) is dipped in a fluid medium (104) and exposed to a high pressure fluid jet (116),
    wherein a gas flow (120) is produced which at least partially envelops the fluid jet (116),
    wherein the fluid jet (116) is discharged together with the gas flow (120) from a chamber (134) through an outlet (140) from the chamber and
    wherein the chamber cross section of the chamber (134) in a direction perpendicular to the longitudinal axis (141) of the chamber tapers towards the outlet (140) from the chamber.
  8. A method in accordance with Claim 7, characterized in that the gas flow (120) is subjected to pressure.
  9. A method in accordance with either of the Claims 7 or 8, characterized in that at least a part of the gas is introduced into the chamber (134) substantially parallel to the jet axis (150) of the fluid jet (116).
  10. A method in accordance with any of the Claims 7 to 9, characterized in that at least a part of the gas is introduced into the chamber (134) in a gas entry direction (162) that is inclined with respect to the jet axis (150) of the fluid jet (116).
  11. A method in accordance with any of the Claims 7 to 10, characterized in that the outlet (140) from the chamber is positioned at a spacing of at most approximately 5 cm relative to a surface (154) of the work piece (106) which is to be cleaned and/or deburred.
EP09718973A 2008-03-14 2009-03-10 Device and method for deburring and/or cleaning a workpiece dipped in a fluid medium Active EP2252413B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09718973T PL2252413T3 (en) 2008-03-14 2009-03-10 Device and method for deburring and/or cleaning a workpiece dipped in a fluid medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008015042A DE102008015042A1 (en) 2008-03-14 2008-03-14 Device and method for deburring and / or cleaning a workpiece immersed in a liquid medium
PCT/EP2009/052780 WO2009112485A1 (en) 2008-03-14 2009-03-10 Device and method for deburring and/or cleaning a workpiece dipped in a fluid medium

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EP2252413A1 EP2252413A1 (en) 2010-11-24
EP2252413B1 true EP2252413B1 (en) 2011-09-07

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US (1) US8608865B2 (en)
EP (1) EP2252413B1 (en)
CN (1) CN101970136B (en)
AT (1) ATE523267T1 (en)
CA (1) CA2718243C (en)
DE (1) DE102008015042A1 (en)
PL (1) PL2252413T3 (en)
WO (1) WO2009112485A1 (en)

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PL2252413T3 (en) 2012-02-29
ATE523267T1 (en) 2011-09-15
CA2718243C (en) 2013-04-30
CN101970136B (en) 2012-10-24
US20110056525A1 (en) 2011-03-10
EP2252413A1 (en) 2010-11-24
DE102008015042A1 (en) 2009-09-17
CN101970136A (en) 2011-02-09
US8608865B2 (en) 2013-12-17
WO2009112485A1 (en) 2009-09-17
CA2718243A1 (en) 2009-09-17

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