EP2246128B1 - Device and method for removing production remnants from conduits in workpieces - Google Patents

Device and method for removing production remnants from conduits in workpieces Download PDF

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Publication number
EP2246128B1
EP2246128B1 EP10160987.3A EP10160987A EP2246128B1 EP 2246128 B1 EP2246128 B1 EP 2246128B1 EP 10160987 A EP10160987 A EP 10160987A EP 2246128 B1 EP2246128 B1 EP 2246128B1
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EP
European Patent Office
Prior art keywords
fluid
negative pressure
workpiece
container
conduit
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EP10160987.3A
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German (de)
French (fr)
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EP2246128A2 (en
EP2246128A3 (en
Inventor
Willi Kalk
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Moers Textilmaschinen GmbH
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Moers Textilmaschinen GmbH
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Publication of EP2246128A3 publication Critical patent/EP2246128A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid

Definitions

  • the invention relates to a method for removing production residues from passages, each having two outlet openings in workpieces by means of a fluid, wherein each passage is flooded with fluid and a negative pressure acting on the fluid in the passage is generated.
  • fluid jets are directed in a pulse-like manner with flow velocities of up to 45 m / s onto the passages of the workpiece with the aid of a nozzle system Remove residues from the passageways.
  • the pressure buildup causes a deformation and detachment of trapped chips.
  • the removal of the residues is often unsatisfactory, since the nozzle jet impinges only on partial surfaces of the passage. Concealed surfaces in the passages that are not directly accessible to the jet can not be effectively cleaned.
  • the efficiency of the residue removal is further reduced by the fact that the incident jet, especially at irregularly shaped passages, such as overflow or cooling channels in cylinder blocks, is reflected several times.
  • a device for removing contaminants from passages of workpieces which operates with ultrasound and a sudden vacuum.
  • the device has a fluid container which is suitable for completely receiving a plurality of workpieces in a washing liquid, which must be preheated to about 80 -90 ° C.
  • Each workpiece has a passage on several outlet openings.
  • a vacuum is placed shock-like via a arranged outside the container adapter via a bottom opening of the container.
  • the washing liquid located inside the workpiece starts to boil abruptly, whereby the ultrasound accelerates the passage of the washing liquid into the vapor phase in the interior of the workpiece.
  • the inflowing washing liquid expands explosively inside the workpiece.
  • each adapter is connected via a valve to one of two vacuum tanks for receiving the vapor / liquid mixture, wherein each of the two vacuum tanks, alternately with a ring vacuum pump is connectable.
  • the invention is based on the object to provide a method of the type mentioned above, which enables improved removal of manufacturing residues from passages of workpieces, especially in passages with undercuts and / or bottlenecks at lower power requirements. Furthermore, an apparatus for carrying out the method is to be proposed.
  • each passage in the workpiece is completely flooded with the fluid, using a liquid fluid at ambient temperature and subsequently to one of the outlet openings of each passage
  • Fluid line is connected, which is connected to means for generating a pressure in the fluid line and the end has an adapter whose edge surrounds the outlet opening of the passage and sealingly rests on the surface of the workpiece, and a negative pressure abruptly the liquid fluid is acted upon by the means for generating a pressure in the fluid line which generates a flow of the fluid in the passage, the resulting negative pressure shock with a negative pressure of up to -0.7 bar for a detachment of the production residues and their removal leads out of the passage.
  • the further improvement of the removal of manufacturing residues is achieved by first flooding each passage with liquid fluid and then bringing the negative pressure abruptly to the fluid to the effect.
  • the resulting negative pressure impact with a negative pressure of up to -0.7 bar, preferably -0.5 bar leads to an effective replacement of the manufacturing residues and their removal from the passage.
  • the negative pressure is abruptly brought to effect, for example, that at least one switching element, in particular one or more valves each flooded passage is brought into conductive communication with a vacuum source, in particular a vacuum container.
  • a vacuum source in particular the vacuum tank already acts the full negative pressure, which is fully effective immediately by opening each switching element in the flooded passages.
  • the connection between the passages and the vacuum source via fluid lines and possibly adapter for connecting the pipes to the passages.
  • Each passage is completely flooded with fluid and, by the pressure acting on the fluid fluid in the passage, a flow of the fluid in each passage is created.
  • a fluid is particularly suitable water. A temperature increase of the water, as in the closest prior art, is not required.
  • the fluid is at ambient temperature of e.g. 22 ° C used.
  • the residue removal is further improved by acting on the flowing fluid, a pulsating negative pressure.
  • the pulsation causes a setting of the manufacturing residues dissolved by the flowing fluid and thus a blockage of the passage at bottlenecks and / or undercuts is prevented.
  • An advantageous apparatus for carrying out the method is characterized by the features of claim 3.
  • the fluid container is dimensioned so that the workpiece is completely absorbed by this and its passages are completely flooded with liquid fluid.
  • the fluid lines connected to a vacuum generator generate the flow in the fully flooded passages.
  • each fluid line end of an adapter In order to bring the full power of the vacuum generator in the passages of the workpiece to act, each fluid line end of an adapter, the edge of which surrounds the outlet opening and sealingly rests on the surface of the workpiece. This ensures that the full suction power of the vacuum generator is coupled into the fluid flowing through the passage where it is converted into flow energy of the fluid.
  • the means for generating a Underpressure a vacuum tank for receiving the fluid, which passes from the fluid container through the passages via the fluid lines and the manifold in the vacuum tank, wherein the vacuum tank is connected above the maximum fluid level of the liquid fluid with a vacuum pump.
  • at least one switching valve is disposed in the fluid lines between the vacuum container and the adapters.
  • the device for carrying out the method according to the invention has a fluid container (1) for receiving a workpiece (2) in the fluid.
  • the workpiece (2) is, for example, a cylinder head of a four-cylinder in-line engine with four cylinder bores and surrounding coolant channels having undercuts.
  • a respective fluid line (3) is connected; the fluid lines are connected to means for generating a negative pressure in the fluid lines (3).
  • the fluid lines (3) each have an adapter (4), which is adapted to the workpiece (2).
  • the edge of the adapter (4) surrounds the various outlet openings of the passages and lies sealingly on the surface of the workpiece (2).
  • the fluid lines (3) converge in a collecting line (5), which is connected to a vacuum container (6) for receiving the fluid. Above the maximum fluid level of the vacuum container (6), this is connected to a vacuum pump designated overall by (7).
  • a switching valve (8a) In the manifold (5) is located between the fluid lines (3) and the vacuum tank (6), a switching valve (8a).
  • a return line (9) between the vacuum container (6) and a storage container (10) another switching valve (8b).
  • the storage container (10) opens the return line (9) in a coarse filter (11).
  • the cleaned fluid passes from the feed tank (10) via a supply pump (12), a fine filter (13) via the return line (14) back into the fluid container (1) for receiving the workpiece (2).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Entfernen von Fertigungsrückständen aus Durchgängen mit jeweils zwei Austrittsöffnungen in Werkstücken mittels eines Fluids, wobei jeder Durchgang mit Fluid geflutet wird und ein auf das Fluid in dem Durchgang wirkender Unterdruck erzeugt wird.The invention relates to a method for removing production residues from passages, each having two outlet openings in workpieces by means of a fluid, wherein each passage is flooded with fluid and a negative pressure acting on the fluid in the passage is generated.

Bei der spanenden Bearbeitung von Werkstücken aus Metall wird überflüssiges Material in Form von Spänen abgetragen. Bei der Herstellung von Durchgängen in Werkstücken, beispielsweise mittels Bohren oder Fräsen, müssen die Späne zuverlässig aus den Durchgängen entfernt werden. Insbesondere bei Durchgängen, die Hinterschneidungen und/oder Verjüngungen aufweisen, ist die Entfernung des überflüssigen Materials problematisch, da sich dieses an den Engstellen bzw. an Ecken und Kanten von Hinterschneidungen festsetzen und den Durchgang verstopfen kann.When machining workpieces made of metal, superfluous material is removed in the form of chips. When making passages in workpieces, such as by drilling or milling, the chips must be reliably removed from the passages. In particular, in passages having undercuts and / or tapers, the removal of the superfluous material is problematic because it can settle on the bottlenecks or corners and edges of undercuts and clog the passage.

Zur Entfernung des überschüssigen Materials aus den Durchgängen sind verschiedenen Verfahren bekannt geworden:

  • Von der Fa. DÜRR Aktiengesellschaft ist das so genannte Tauchfluten von Werkstücken zur Rückstandsentfernung in Durchgängen entwickelt worden, bei dem das Werkstück in eine Flutkammer gelegt wird, die mit etwa 300 Liter Waschflüssigkeit gefüllt wird. Durch Beaufschlagen von in der Waschflüssigkeit angeordneten Düsen mit etwa 10 bar Flüssigkeitsdrucks entstehen in der Flutkammer starke Turbulenzen, die die das Reinigen der Werkstücke bewirken.
For removing the excess material from the passages, various methods have become known:
  • The company DÜRR Aktiengesellschaft has developed the so-called dip-flooding of workpieces for residue removal in passes, in which the workpiece is placed in a flood chamber which is filled with about 300 liters of washing liquid. By applying arranged in the washing liquid nozzles with about 10 bar liquid pressure caused in the flood chamber strong turbulence, which cause the cleaning of the workpieces.

Bei dem so genannten Aqua Cannon Verfahren der Valiant Cleaning Technology GmbH werden Fluidstrahlen mit Hilfe eines Düsensystems impulsartig mit Strömungsgeschwindigkeiten von bis zu 45 m/s auf die Durchgänge des Werkstücks gerichtet, um die Rückstände aus den Durchgängen zu entfernen. Der Druckaufbau bewirkt eine Verformung und Ablösung von eingeklemmten Spänen. Die Entfernung der Rückstände ist jedoch vielfach nicht befriedigend, da der Düsenstrahl nur auf Teilflächen des Durchgangs auftrifft. Verdeckte, für den Düsenstrahl nicht unmittelbar zugängliche Flächen in den Durchgängen lassen sich nicht wirksam reinigen. Die Effizienz der Rückstandsentfernung wird weiter dadurch gemindert, dass der auftreffende Düsenstrahl, insbesondere bei unregelmäßig geformten Durchgängen, wie beispielsweise Überström- oder Kühlkanäle in Zylinderblöcken, mehrfach reflektiert wird.In the so-called Aqua Cannon process of Valiant Cleaning Technology GmbH, fluid jets are directed in a pulse-like manner with flow velocities of up to 45 m / s onto the passages of the workpiece with the aid of a nozzle system Remove residues from the passageways. The pressure buildup causes a deformation and detachment of trapped chips. However, the removal of the residues is often unsatisfactory, since the nozzle jet impinges only on partial surfaces of the passage. Concealed surfaces in the passages that are not directly accessible to the jet can not be effectively cleaned. The efficiency of the residue removal is further reduced by the fact that the incident jet, especially at irregularly shaped passages, such as overflow or cooling channels in cylinder blocks, is reflected several times.

Aus der DE 10 2005 019 285 B3 ist ein Reinigungsverfahren und eine Reinigungsanlage zur vollständigen Reinigung von Werkstückinnenräumen bzw. Kanälen insbesondere von Motorenteilen bekannt. Durch ein geregeltes Durchspülen des Innenraumes bzw. der Kanäle mit einem voll ausfüllenden Volumenstrom an Reinigungsflüssigkeit soll ein sicheres Freispülen und Abreinigen von Spänen sichergestellt werden. Um eingeklemmte Späne aus vorhandenen Innenkonturen des Werkstücks zu entfernen, ist der Volumenstrom an Reinigungsflüssigkeit mittels einer Ventilanordnung umkehrbar. Das Durchspülen der Hohlräume und/oder des Kanalsystems des Werkstücks erfolgt mit mindestens einem Ein- und mindestens einem Ausflussanschluss von Rohr- oder Schlauchleitungen für die Reinigungsflüssigkeit, die dabei gegenüber dem Werkstück dichtend anschließen. Die Reinigungsflüssigkeit steht unter einem Überdruck von bis zu 8 bar zur Verfügung.From the DE 10 2005 019 285 B3 is a cleaning method and a cleaning system for the complete cleaning of workpiece interiors or channels in particular of engine parts known. By a controlled flushing of the interior or the channels with a full-filling volume flow of cleaning liquid safe flushing and cleaning of chips should be ensured. To remove trapped chips from existing inner contours of the workpiece, the volume flow of cleaning fluid by means of a valve assembly is reversible. The purging of the cavities and / or the channel system of the workpiece is carried out with at least one inlet and at least one outflow connection of pipe or hose lines for the cleaning liquid, which connect sealed against the workpiece. The cleaning fluid is available under an overpressure of up to 8 bar.

Aus der DE 297 17 946 U1 ist eine Vorrichtung zum Entfernen von Verunreinigungen aus Durchgängen von Werkstücken bekannt, die mit Ultraschall und einem schlagartig wirkenden Vakuum arbeitet. Die Vorrichtung weist einen Fluidbehälter auf, der zur vollständigen Aufnahme mehrerer Werkstücke in einer Waschflüssigkeit geeignet ist, die auf etwa 80 -90 ° C vorgeheizt werden muss. Jedes Werkstück weist einen Durchgang mit mehreren Austrittsöffnungen auf. An eine der Austrittsöffnungen jedes Werkstücks wird über einen außerhalb des Behälters angeordneten Adapter über eine bodenseitige Öffnung des Behälters schockartig ein Vakuum gelegt. Die im Inneren des Werkstücks befindliche Waschflüssigkeit beginnt schlagartig zu sieden, wobei der Ultraschall den Übergang der Waschflüssigkeit in die Dampfphase im Inneren des Werkstücks beschleunigt. Die nachströmende Waschflüssigkeit expandiert im Inneren des Werkstücks explosiv. Die Strömungsverhältnisse des Dampfs in Verbindung mit dem Ultraschall bewirken die Reinigung des Innenraums des Werkstücks. Die untere Öffnung jedes Adapters ist über ein Ventil mit einem von zwei Unterdruckbehältern zur Aufnahme des Dampf-/ Flüssigkeitsgemischs verbunden, wobei jeder der beiden Unterdruckbehälter, wechselweise mit einer Ringvakuumpumpe verbindbar ist.From the DE 297 17 946 U1 a device for removing contaminants from passages of workpieces is known which operates with ultrasound and a sudden vacuum. The device has a fluid container which is suitable for completely receiving a plurality of workpieces in a washing liquid, which must be preheated to about 80 -90 ° C. Each workpiece has a passage on several outlet openings. At one of the outlet openings of each workpiece, a vacuum is placed shock-like via a arranged outside the container adapter via a bottom opening of the container. The washing liquid located inside the workpiece starts to boil abruptly, whereby the ultrasound accelerates the passage of the washing liquid into the vapor phase in the interior of the workpiece. The inflowing washing liquid expands explosively inside the workpiece. The flow conditions of the steam in conjunction with the ultrasound cause the cleaning of the interior of the workpiece. The lower opening of each adapter is connected via a valve to one of two vacuum tanks for receiving the vapor / liquid mixture, wherein each of the two vacuum tanks, alternately with a ring vacuum pump is connectable.

Ausgehend von dem Stand der Technik nach der DE 297 17 946 U1 liegt der Erfindung die Aufgabe zu Grunde, ein Verfahren der eingangs erwähnten Art zu schaffen, das eine verbesserte Entfernung von Fertigungsrückständen aus Durchgängen von Werkstücken, insbesondere auch bei Durchgängen mit Hinterschneidungen und/oder Engstellen bei geringerem Leistungsbedarf ermöglicht. Des Weiteren soll eine Vorrichtung zur Durchführung des Verfahrens vorgeschlagen werden.Based on the state of the art according to the DE 297 17 946 U1 The invention is based on the object to provide a method of the type mentioned above, which enables improved removal of manufacturing residues from passages of workpieces, especially in passages with undercuts and / or bottlenecks at lower power requirements. Furthermore, an apparatus for carrying out the method is to be proposed.

Diese Aufgabe wird bei einem Verfahren der eingangs erwähnten Art dadurch gelöst, dass zunächst beim Einlegen des Werkstücks in den Fluidbehälter jeder Durchgang in dem Werkstück vollständig mit dem Fluid geflutet wird, wobei ein flüssiges Fluid mit Umgebungstemperatur eingesetzt wird undanschließend an eine der Austrittsöffnungen jedes Durchgangs eine Fluidleitung angeschlossen wird, die mit Mitteln zur Erzeugung eines Drucks in der Fluidleitung verbunden ist und endseitig einen Adapter aufweist, dessen Rand die Austrittssöffnung des Durchgangs umgibt und dichtend auf der Oberfläche des Werkstücks aufliegt, und ein Unterdruck schlagartig auf das flüssige Fluid mit den Mitteln zur Erzeugung eines Drucks in der Fluidleitung zur Wirkung gebracht wird, der eine Strömung des flüssigen Fluids in dem Durchgang erzeugt, wobei der dabei auftretende Unterdruckstoß mit einen Unterdruck von bis zu -0,7 bar zu einer Ablösung der Fertigungsrückstände und deren Abtransport aus dem Durchgang führt.This object is achieved in a method of the type mentioned above in that first, when inserting the workpiece into the fluid container, each passage in the workpiece is completely flooded with the fluid, using a liquid fluid at ambient temperature and subsequently to one of the outlet openings of each passage Fluid line is connected, which is connected to means for generating a pressure in the fluid line and the end has an adapter whose edge surrounds the outlet opening of the passage and sealingly rests on the surface of the workpiece, and a negative pressure abruptly the liquid fluid is acted upon by the means for generating a pressure in the fluid line which generates a flow of the fluid in the passage, the resulting negative pressure shock with a negative pressure of up to -0.7 bar for a detachment of the production residues and their removal leads out of the passage.

Die weitere Verbesserung der Entfernung von Fertigungsrückständen wird dadurch erzielt, dass zunächst jeder Durchgang mit flüssigem Fluid geflutet und anschließend der Unterdruck schlagartig auf das Fluid zur Wirkung gebracht wird. Der dabei auftretende Unterdruckstoß mit einem Unterdruck von bis zu -0,7 bar, vorzugsweise -0,5 bar führt zu einer wirksamen Ablösung der Fertigungsrückstände und deren Abtransport aus dem Durchgang. Der Unterdruck wird beispielsweise dadurch schlagartig zur Wirkung gebracht, dass über mindestens ein Schaltorgan, insbesondere ein oder mehrere Ventile jeder geflutete Durchgang mit einer Unterdruckquelle, insbesondere einem Unterdruckbehälter in leitende Verbindung gebracht wird. In der Unterdruckquelle, insbesondere dem Unterdruckbehälter wirkt bereits der volle Unterdruck, der durch Öffnen jedes Schaltorgans in den gefluteten Durchgängen sofort voll wirksam wird. Die Verbindung zwischen den Durchgängen und der Unterdruckquelle erfolgt über Fluidleitungen und ggf. Adapter zum Anschluss der Rohrleitungen an die Durchgänge.The further improvement of the removal of manufacturing residues is achieved by first flooding each passage with liquid fluid and then bringing the negative pressure abruptly to the fluid to the effect. The resulting negative pressure impact with a negative pressure of up to -0.7 bar, preferably -0.5 bar leads to an effective replacement of the manufacturing residues and their removal from the passage. The negative pressure is abruptly brought to effect, for example, that at least one switching element, in particular one or more valves each flooded passage is brought into conductive communication with a vacuum source, in particular a vacuum container. In the vacuum source, in particular the vacuum tank already acts the full negative pressure, which is fully effective immediately by opening each switching element in the flooded passages. The connection between the passages and the vacuum source via fluid lines and possibly adapter for connecting the pipes to the passages.

Jeder Durchgang wird vollständig mit Fluid geflutet und durch den auf das flüssige Fluid in dem Durchgang wirkenden Druck eine Strömung des Fluids in jedem Durchgang erzeugt. Als Fluid eignet sich insbesondere Wasser. Eine Temperaturerhöhung des Wassers, wie beim nächstliegenden Stand der Technik, ist nicht erforderlich. Das Fluid wird mit Umgebungstemperatur von z.B. 22° C eingesetzt.Each passage is completely flooded with fluid and, by the pressure acting on the fluid fluid in the passage, a flow of the fluid in each passage is created. As a fluid is particularly suitable water. A temperature increase of the water, as in the closest prior art, is not required. The fluid is at ambient temperature of e.g. 22 ° C used.

Insbesondere bei sich verengenden Durchgängen ist es vorteilhaft, dass auf das Fluid ein negativer Druck (Unterdruck) wirkt, der eine Strömung des Fluids in dem Durchgang von der Engstelle in Richtung der Erweiterung des Durchgangs erzeugt. Die Fertigungsrückstände werden dadurch wirksam von der Engstelle in Richtung der Erweiterung abtransportiert, so dass Verstopfungen vermieden werden. Des Weiteren ist der Leistungsbedarf zur Rückstandsentfernung bei Verwendung von Unterdruck geringer als bei Verwendung eines Überdrucks, der auf das in dem Durchgang befindliche Fluid wirkt.Particularly in the case of narrowing passages, it is advantageous for a negative pressure (negative pressure) to be applied to the fluid. acting to create a flow of the fluid in the passage from the throat to the extension of the passage. The production residues are thus effectively removed from the bottleneck in the direction of the expansion, so that blockages are avoided. Furthermore, the power requirement for residue removal when using negative pressure is lower than when using an overpressure that acts on the fluid in the passage.

Die Rückstandsentfernung wird weiter dadurch verbessert, dass auf das strömende Fluid ein pulsierender Unterdruck wirkt. Das Pulsieren bewirkt, dass ein Festsetzen der von dem strömenden Fluid gelösten Fertigungsrückstände und damit eine Verstopfung des Durchgangs an Engstellen und /oder Hinterschneidungen verhindert wird.The residue removal is further improved by acting on the flowing fluid, a pulsating negative pressure. The pulsation causes a setting of the manufacturing residues dissolved by the flowing fluid and thus a blockage of the passage at bottlenecks and / or undercuts is prevented.

Eine vorteilhafte Vorrichtung zur Durchführung des Verfahrens ist durch die Merkmale des Anspruchs 3 gekennzeichnet.An advantageous apparatus for carrying out the method is characterized by the features of claim 3.

Der Fluidbehälter ist so dimensioniert, dass das Werkstück vollständig von diesem aufgenommen und dessen Durchgänge vollständig mit flüssigem Fluid geflutet sind. Die mit einem Unterdruckerzeuger verbundenen Fluidleitungen erzeugen die Strömung in den vollständig gefluteten Durchgängen.The fluid container is dimensioned so that the workpiece is completely absorbed by this and its passages are completely flooded with liquid fluid. The fluid lines connected to a vacuum generator generate the flow in the fully flooded passages.

Um die volle Leistung des Unterdruckerzeugers in den Durchgängen des Werkstücks zur Wirkung zu bringen, weist jede Fluid-Leitung endseitig einen Adapter auf, dessen Rand die Austrittsöffnung umgibt und dichtend auf der Oberfläche des Werkstücks aufliegt. Hierdurch wird sichergestellt, dass die volle Saugleistung des Unterdruckerzeugers in das den Durchgang flutende flüssige Fluid eingekoppelt und dort in Strömungsenergie des Fluids umgesetzt wird.In order to bring the full power of the vacuum generator in the passages of the workpiece to act, each fluid line end of an adapter, the edge of which surrounds the outlet opening and sealingly rests on the surface of the workpiece. This ensures that the full suction power of the vacuum generator is coupled into the fluid flowing through the passage where it is converted into flow energy of the fluid.

Zur Entfernung von Fertigungsrückständen mittels negativem Druck (Unterdruck), umfassen die Mittel zur Erzeugung eines Unterdrucks einen Unterdruckbehälter zur Aufnahme des Fluids, das von dem Fluid-Behälter durch die Durchgänge über die Fluidleitungen sowie die Sammelleitung in den Unterdruckbehälter gelangt, wobei der Unterdruckbehälter oberhalb des maximalen Fluidspiegels des flüssigen Fluids mit einer Vakuumpumpe verbunden ist. Um den von einer Vakuumpumpe in dem Unterdruckbehälter aufgebauten Unterdruck schlagartig in den Fluidleitungen zur Wirkung zu bringen, ist in den Fluidleitungen zwischen dem Unterdruckbehälter sowie den Adaptern mindestens ein Schalt-Ventil angeordnet.To remove manufacturing residues by means of negative pressure (negative pressure), the means for generating a Underpressure a vacuum tank for receiving the fluid, which passes from the fluid container through the passages via the fluid lines and the manifold in the vacuum tank, wherein the vacuum tank is connected above the maximum fluid level of the liquid fluid with a vacuum pump. In order to bring the built-up of a vacuum pump in the vacuum container abruptly in the fluid lines to act, at least one switching valve is disposed in the fluid lines between the vacuum container and the adapters.

Nachfolgend wird das erfindungsgemäße Verfahren anhand der schematischen Darstellung in Figur 1 näher erläutert.The method according to the invention will be described below with reference to the schematic representation in FIG FIG. 1 explained in more detail.

Die Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens weist einen Fluidbehälter (1) zur Aufnahme eines Werkstücks (2) in dem Fluid auf. Bei dem Werkstück (2) handelt es sich beispielsweise um einen Zylinderkopf eines vierzylindrigen Reihenmotors mit vier Zylinderbohrungen und diese umgebende, Hinterschneidungen aufweisende Kühlmittelkanäle. An einer der Austrittsöffnungen der vorgenannten Durchgänge in dem Zylinderkopf ist jeweils eine Fluidleitung (3) angeschlossen; die Fluidleitungen sind mit Mitteln zur Erzeugung eines Unterdrucks in den Fluidleitungen (3) verbunden. Endseitig weisen die Fluidleitungen (3) jeweils ein Adapter (4) auf, der an das Werkstück (2) angepasst ist. Hierzu umgibt der Rand des Adapters (4) die verschiedenen Austrittsöffnungen der Durchgänge und liegt dichtend auf der Oberfläche des Werkstücks (2) auf. Die Fluidleitungen (3) laufen in einer Sammelleitung (5) zusammen, die mit einem Unterdruckbehälter (6) zur Aufnahme des Fluids verbunden ist. Oberhalb des maximalen Fluidspiegels des Unterdruckbehälters (6) ist dieser mit einer insgesamt mit (7) bezeichneten Vakuumpumpe verbunden. In der Sammelleitung (5) befindet sich zwischen den Fluidleitungen (3) und dem Unterdruckbehälter (6) ein Umschaltventil (8a).The device for carrying out the method according to the invention has a fluid container (1) for receiving a workpiece (2) in the fluid. The workpiece (2) is, for example, a cylinder head of a four-cylinder in-line engine with four cylinder bores and surrounding coolant channels having undercuts. At one of the outlet openings of the aforementioned passages in the cylinder head, a respective fluid line (3) is connected; the fluid lines are connected to means for generating a negative pressure in the fluid lines (3). At the end, the fluid lines (3) each have an adapter (4), which is adapted to the workpiece (2). For this purpose, the edge of the adapter (4) surrounds the various outlet openings of the passages and lies sealingly on the surface of the workpiece (2). The fluid lines (3) converge in a collecting line (5), which is connected to a vacuum container (6) for receiving the fluid. Above the maximum fluid level of the vacuum container (6), this is connected to a vacuum pump designated overall by (7). In the manifold (5) is located between the fluid lines (3) and the vacuum tank (6), a switching valve (8a).

Ferner befindet sich in einer Rückführleitung (9) zwischen dem Unterdruckbehälter (6) und einem Vorlagebehälter (10) ein weiteres Umschaltventil (8b). In dem Vorlagebehälter (10) mündet die Rückführleitung (9) in einem Grobfilter (11). Das gereinigte Fluid gelangt aus dem Vorlagebehälter (10) über eine Versorgungspumpe (12), einen Feinfilter (13) über die Rückführleitung (14) zurück in den Fluidbehälter (1) zur Aufnahme des Werkstücks (2).Further, in a return line (9) between the vacuum container (6) and a storage container (10), another switching valve (8b). In the storage container (10) opens the return line (9) in a coarse filter (11). The cleaned fluid passes from the feed tank (10) via a supply pump (12), a fine filter (13) via the return line (14) back into the fluid container (1) for receiving the workpiece (2).

Die Vorrichtung arbeitet wie folgt:

  • Jeder Durchgang in dem Werkstück (2) wird beim Einlegen in das Fluid in dem Fluidbehälter (1) vollständig mit dem Fluid geflutet. In dem Unterdruckbehälter (6) wird mittels der Vakuumpumpe (7) ein Unterdruck aufgebaut. Durch Öffnen des Umschaltventils (8a) in der Sammelleitung (5) wird der in dem Unterdruckbehälter (6) herrschende Unterdruck in den Fluidleitungen (3) schlagartig wirksam. Hierdurch wird eine starke Strömung des Fluids in den Durchgängen des Werkstücks (2) erzeugt. Die dabei von der Strömung mitgerissenen Fertigungsrückstände gelangen über die Fluidleitung(en) (3) sowie die Sammelleitung (5) bei geöffnetem Umschaltventil (8a) und geschlossenem Umschaltventil (8b) in den Unterdruckbehälter (6).
  • Nach Beendigung der Rückstandsentfernung wird die Vakuumpumpe (7) deaktiviert, so dass über das geöffnete Umschaltventil (8b) das mit den Rückständen beladene Fluid aus dem Unterdruckbehälter (6) über die Rückführleitung (9) sowie den Grobfilter (11) in den Vorlagebehälter (10) gelangt. Von dort wird das Fluid mit Hilfe der Versorgungspumpe (12) über einen Feinfilter (13) sowie die Rückführleitung (14) nach Entfernung der Rückstände dem Fluidbehälter (1) erneut zugeführt.
Bezugszeichenliste Nr. Bezeichnung 1 Fluidbehälter 2 Werkstück 3 Fluidleitung 4 Adapter 5 Sammelleitung 6 Unterdruckbehälter 7 Vakuumpumpe 8a Umschaltventil 8b Umschaltventil 9 Rückführleitung 10 Vorlagebehälter 11 Grobfilter 12 Versorgungspumpe 13 Feinfilter 14 Rückführleitung The device works as follows:
  • Each passage in the workpiece (2) is completely flooded with the fluid when placed in the fluid in the fluid container (1). In the vacuum container (6), a negative pressure is built up by means of the vacuum pump (7). By opening the switching valve (8a) in the manifold (5) of the negative pressure prevailing in the vacuum container (6) in the fluid lines (3) is suddenly effective. As a result, a strong flow of the fluid in the passages of the workpiece (2) is generated. The production residues entrained thereby by the flow arrive via the fluid line (s) (3) as well as the collecting line (5) with open switching valve (8a) and closed switching valve (8b) into the vacuum container (6).
  • After completion of the residue removal, the vacuum pump (7) is deactivated, so that via the open switching valve (8b) loaded with the residues fluid from the vacuum tank (6) via the return line (9) and the coarse filter (11) in the storage container (10 ). From there, the fluid with the aid of the supply pump (12) via a fine filter (13) and the return line (14) after removal of the residues the fluid container (1) is supplied again.
<B><u> REFERENCE LIST </ u></b> No. description 1 fluid container 2 workpiece 3 fluid line 4 adapter 5 manifold 6 Pressurized container 7 vacuum pump 8a switching valve 8b switching valve 9 Return line 10 storage container 11 coarse filter 12 supply pump 13 fine filter 14 Return line

Claims (5)

  1. Method for removing production remnants from conduits each having two outlet openings in workpieces by means of a fluid, wherein each conduit is flooded with fluid and a negative pressure acting on the fluid in the conduit is produced, characterized in that
    - initially when inserting the workpiece into a fluid container (1) each conduit in the workp-ece is completely flooded with the fluid, wherein a liquid fluid at ambient temperature is used and
    - then a fluid line (3) is connected to one of the outlet openings of each conduit, which fluid line is connected to means for producing a pressure in the fluid line and at the end has an adapter (4) whose end surrounds the outlet opening of the conduit and rests sealingly on the surface of the workpiece and a negative pressure is brought to act abruptly on the liquid fluid with the means for producing a pressure in the fluid line, which generates a flow of the liquid fluid in the conduit, wherein the accompanying negative pressure surge with a negative pressure of up to -0.7 bar leads to a separation of the production remnants and their removal from the conduit.
  2. The method according to claim 1, characterized in that a pulsating negative pressure acts on the flowing fluid.
  3. Apparatus for carrying out the method according to claim 1, wherein
    - the apparatus comprises a fluid container (1) which is suitable for completely accommodating a workpiece having a plurality of conduits each having two outlet openings in a fluid,
    - the apparatus comprises a plurality of fluid lines (3), which are connected to means for producing a negative pressure in each fluid line, wherein each fluid line can be connected to one of the outlet openings of one of the conduits of the workpiece,
    characterised in that
    - the means for producing a negative pressure comprise a negative pressure container (6) for accommodating the liquid fluid, which is connected to each fluid line (3) and the negative pressure container (6) is connected above the maximum fluid level to a vacuum pump (7),
    - each fluid line (3) runs together in a collecting duct (5) which is connected to the negative pressure container (6) to accommodate the liquid fluid, wherein a reversing valve (8a) is located in the collecting duct (5) between the fluid lines (3) and the negative pressure container (6), which reversing valve is adapted in such a manner that by opening the reversing valve (8a) in the collecting duct (5) the negative pressure prevailing in the negative pressure container (6) becomes abruptly active in the fluid lines (3).
  4. The apparatus according to claim 3, characterized in that each fluid line has an adapter at one end, whose edge is suitable for surrounding one of the outlet openings of one of the conduits of the workpiece and of resting sealingly on the surface of the workpiece.
  5. The apparatus according to claim 3 or 4, characterized in that the means for generating a negative pressure generate a pulsating negative pressure in each fluid line.
EP10160987.3A 2009-04-28 2010-04-26 Device and method for removing production remnants from conduits in workpieces Not-in-force EP2246128B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009018900 2009-04-28
DE102009038733.1A DE102009038733B4 (en) 2009-04-28 2009-08-27 Method and device for removing production residues from passages in workpieces

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EP2246128A2 EP2246128A2 (en) 2010-11-03
EP2246128A3 EP2246128A3 (en) 2012-09-19
EP2246128B1 true EP2246128B1 (en) 2014-09-17

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EP10160987.3A Not-in-force EP2246128B1 (en) 2009-04-28 2010-04-26 Device and method for removing production remnants from conduits in workpieces

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EP (1) EP2246128B1 (en)
DE (1) DE102009038733B4 (en)

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JP2002159925A (en) * 2000-11-27 2002-06-04 Kinji Matsumoto Instantaneous vacuum washer
DE10153087A1 (en) * 2001-10-30 2003-05-22 Klaus Doehrer Method and device for removing oil, grease and chippings from workpiece involves spraying jet of cleaning fluid under pressure onto same which is then sucked off with dirt particles
US7320328B2 (en) * 2003-03-19 2008-01-22 James Byron Walker Pulsed pressure cleaning apparatus and process
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Publication number Priority date Publication date Assignee Title
CN109843454A (en) * 2016-10-12 2019-06-04 埃克科林有限公司 For cleaning the device and method of workpiece

Also Published As

Publication number Publication date
EP2246128A2 (en) 2010-11-03
EP2246128A3 (en) 2012-09-19
DE102009038733A1 (en) 2010-11-11
DE102009038733B4 (en) 2020-11-12

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