EP2246128A2 - 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
EP2246128A2
EP2246128A2 EP10160987A EP10160987A EP2246128A2 EP 2246128 A2 EP2246128 A2 EP 2246128A2 EP 10160987 A EP10160987 A EP 10160987A EP 10160987 A EP10160987 A EP 10160987A EP 2246128 A2 EP2246128 A2 EP 2246128A2
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EP
European Patent Office
Prior art keywords
fluid
negative pressure
passage
workpiece
conduits
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Granted
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EP10160987A
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German (de)
French (fr)
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EP2246128B1 (en
EP2246128A3 (en
Inventor
Willi Kalk
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Moers Textilmaschinen GmbH
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Moers Textillmaschinen GmbH
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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 in workpieces by means of a fluid, each passage being completely flooded with fluid and a pressure acting on the fluid in the passage creating a flow of the fluid in the passage.
  • 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.
  • a flood chamber which is filled with about 300 liters of washing liquid.
  • 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.
  • 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.
  • a device for carrying out the method is to be proposed.
  • This object is achieved in a method of the type mentioned in that initially flooded each passage and then a negative pressure on the fluid is brought into effect.
  • the further improvement of the removal of manufacturing residues is achieved by first flooding each passage and then bringing the negative pressure preferably abruptly on 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.
  • a negative pressure acts on the fluid, which generates a flow of the fluid in the passage from the constriction in the direction of 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.
  • the power requirement for residue removal when using Underpressure less than using a positive pressure acting on the fluid in the passage.
  • each passage is completely flooded with fluid and, by pressure acting on the 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 is not required. It can with ambient temperature of e.g. 22 ° C are 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 device for carrying out the method is characterized in that the device has a fluid container for receiving a workpiece in the fluid, the workpiece has at least one passage with two outlet openings and a fluid line is connected to one of the outlet openings of each passage, which are connected to means for generating a negative pressure in the fluid line.
  • the fluid container is dimensioned so that the workpiece is completely absorbed by this and its passages are completely flooded with fluid.
  • the fluid line connected to a vacuum generator generates the flow in the fully flooded passage.
  • the 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, the 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 negative pressure preferably comprise a vacuum container for receiving the fluid which passes from the fluid container through the passages via the fluid lines in the vacuum vessel, wherein the vacuum container above the maximum fluid level connected to 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).
  • ends 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).
  • 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).
  • a negative pressure is built up by means of the vacuum pump (7).
  • 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.
  • the production residues entrained thereby by the flow pass over the fluid line (s) (3) as well as the collecting line (5) when the switching valve (8a) is open and closed Change-over valve (8b) in the vacuum tank (6).
  • 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 to the fluid container (1) again supplied.

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

Abstract

The method involves completely flooding each of conduits with fluid, where fluid pressure acting on the fluid in the conduits generates flow of the fluid in the conduits. The conduits are flooded, and negative pressure is applied on the fluid in the conduits. A reversing valve (8a) is located between a set of fluid lines (3) and a vacuum container (6) in a collecting duct (5). Another reversing valve (8b) is located between the vacuum container and a collection container (10) in a return line (9). An independent claim is also included for a device for removing production remnants from conduits in workpieces.

Description

Die Erfindung betrifft ein Verfahren zum Entfernen von Fertigungsrückständen aus Durchgängen in Werkstücken mittels eines Fluids, wobei jeder Durchgang vollständig mit Fluid geflutet wird und ein auf das Fluid in dem Durchgang wirkender Druck eine Strömung des Fluids in dem Durchgang erzeugt.The invention relates to a method for removing production residues from passages in workpieces by means of a fluid, each passage being completely flooded with fluid and a pressure acting on the fluid in the passage creating a flow of the fluid in the passage.

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:For removing the excess material from the passages, various methods have become known:

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.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.

Ausgehend von diesem Stand der Technik 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 this prior art, 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. Of Furthermore, a device for carrying out the method is to be proposed.

Diese Aufgabe wird bei einem Verfahren der eingangs erwähnten Art dadurch gelöst, dass zunächst jeder Durchgang geflutet und anschließend ein Unterdruck auf das Fluid zur Wirkung gebracht wird.This object is achieved in a method of the type mentioned in that initially flooded each passage and then a negative pressure on the fluid is brought into effect.

Die weitere Verbesserung der Entfernung von Fertigungsrückständen wird dadurch erzielt, dass zunächst jeder Durchgang geflutet und anschließend der Unterdruck vorzugsweise 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 and then bringing the negative pressure preferably abruptly on 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.

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 narrowing passages, it is advantageous that a negative pressure (negative pressure) acts on the fluid, which generates a flow of the fluid in the passage from the constriction in the direction of 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 Underpressure less than using a positive pressure acting on the fluid in the passage.

Wie auch beim gattungsbildenden Stand der Technik wird jeder Durchgang vollständig mit Fluid geflutet und durch auf das Fluid in dem Durchgang wirkenden Druck eine Strömung des Fluids in jedem Durchgang erzeugt. Als Fluid eignet sich insbesondere Wasser. Eine Temperaturerhöhung des Wassers ist nicht erforderlich. Es kann mit Umgebungstemperatur von z.B. 22° C eingesetzt werden.As with the generic art, each passage is completely flooded with fluid and, by pressure acting on the 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 is not required. It can with ambient temperature of e.g. 22 ° C are used.

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 dadurch gekennzeichnet, dass die Vorrichtung einen Fluid-Behälter zur Aufnahme eines Werkstücks in dem Fluid aufweist, das Werkstück mindestens einen Durchgang mit zwei Austrittsöffnungen aufweist und an eine der Austrittsöffnungen jedes Durchgangs eine Fluid-Leitung angeschlossen ist, die mit Mitteln zur Erzeugung eines Unterdrucks in der Fluid-Leitung verbunden sind.An advantageous device for carrying out the method is characterized in that the device has a fluid container for receiving a workpiece in the fluid, the workpiece has at least one passage with two outlet openings and a fluid line is connected to one of the outlet openings of each passage, which are connected to means for generating a negative pressure in the fluid line.

Der Fluidbehälter ist so dimensioniert, dass das Werkstück vollständig von diesem aufgenommen und dessen Durchgänge vollständig mit Fluid geflutet sind. Die mit einem Unterdruckerzeuger verbundene Fluidleitung erzeugt die Strömung in dem vollständig gefluteten Durchgang. Insoweit vermeidet das erfindungsgemäße Verfahren sowie die Vorrichtung zu dessen Durchführung die Nachteile, die mit dem Anprall eines Düsenstrahls lediglich an einer Teilfläche des Durchgangs verbunden sind.The fluid container is dimensioned so that the workpiece is completely absorbed by this and its passages are completely flooded with fluid. The fluid line connected to a vacuum generator generates the flow in the fully flooded passage. In that regard, the method according to the invention and the device for carrying it out avoid the disadvantages associated with the impact of a nozzle jet only on a partial surface of the passage.

Um die volle Leistung des Unterdruckerzeugers in den Durchgängen des Werkstücks zur Wirkung zu bringen, weist die 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 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, the 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 vorzugsweise einen Unterdruckbehälter zur Aufnahme des Fluids, das von dem Fluid-Behälter durch die Durchgänge über die Fluidleitungen in den Unterdruckbehälter gelangt, wobei der Unterdruckbehälter oberhalb des maximalen Fluidspiegels 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 negative pressure preferably comprise a vacuum container for receiving the fluid which passes from the fluid container through the passages via the fluid lines in the vacuum vessel, wherein the vacuum container above the maximum fluid level connected to 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). ends 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:The device works as follows:

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).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 pass over the fluid line (s) (3) as well as the collecting line (5) when the switching valve (8a) is open and closed Change-over valve (8b) in the vacuum tank (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.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 to the fluid container (1) again supplied.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Nr.No. Bezeichnungdescription 11 Fluidbehälterfluid container 22 Werkstückworkpiece 33 Fluidleitungfluid line 44 Adapteradapter 55 Sammelleitungmanifold 66 UnterdruckbehälterPressurized container 77 Vakuumpumpevacuum pump 8a8a Umschaltventilswitching valve 8b8b Umschaltventilswitching valve 99 RückführleitungReturn line 1010 Vorlagebehälterstorage container 1111 Grobfiltercoarse filter 1212 Versorgungspumpesupply pump 1313 Feinfilterfine filter 1414 RückführleitungReturn line

Claims (6)

Verfahren zum Entfernen von Fertigungsrückständen aus Durchgängen in Werkstücken mittels eines Fluids, wobei jeder Durchgang vollständig mit Fluid geflutet wird und ein auf das Fluid in dem Durchgang wirkender Druck eine Strömung des Fluids in dem Durchgang erzeugt, dadurch gekennzeichnet, dass zunächst jeder Durchgang geflutet und anschließend ein Unterdruck auf das Fluid zur Wirkung gebracht wird.A method of removing production residues from passageways in workpieces by means of a fluid, each passage being completely flooded with fluid, and a pressure acting on the fluid in the passage creating a flow of the fluid in the passageway, characterized in that first each passageway is flooded and subsequently a negative pressure on the fluid is brought into effect. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass auf das strömende Fluid ein pulsierender Unterdruck wirkt.A method according to claim 1, characterized in that acts on the flowing fluid, a pulsating negative pressure. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass - die Vorrichtung einen Fluidbehälter zur Aufnahme eines Werkstücks in dem Fluid aufweist, - das Werkstück mindestens einen Durchgang mit zwei Austrittsöffnungen aufweist, - an eine der Austrittsöffnungen jedes Durchgangs eine Fluidleitung angeschlossen ist, die mit Mitteln zur Erzeugung eines Drucks in der Fluidleitung verbunden sind und - die Mittel zur Erzeugung eines Drucks einen Unterdruck in jeder Fluidleitung erzeugen. Apparatus for carrying out the method according to claim 1, characterized in that the device has a fluid container for receiving a workpiece in the fluid, the workpiece has at least one passage with two outlet openings, - A fluid line is connected to one of the outlet openings of each passage, which are connected to means for generating a pressure in the fluid line and - The means for generating a pressure generate a negative pressure in each fluid line. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Fluidleitung endseitig einen Adapter aufweist, dessen Rand die Austrittsöffnung umgibt und dichtend auf der oberfläche des Werkstücks aufliegt.Apparatus according to claim 3, characterized in that the fluid line end has an adapter whose edge surrounds the outlet opening and sealingly rests on the surface of the workpiece. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Mittel zur Erzeugung eines Unterdrucks einen Unterdruckbehälter zur Aufnahme des Fluids umfassen, der mit jeder Fluidleitung verbunden ist und der Unterdruckbehälter oberhalb des maximalen Fluidspiegels mit einer Vakuumpumpe verbunden ist.Apparatus according to claim 3 or 4, characterized in that the means for generating a negative pressure comprise a vacuum container for receiving the fluid, which is connected to each fluid line and the vacuum tank is connected above the maximum fluid level with a vacuum pump. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Mittel zur Erzeugung eines Unterdrucks einen pulsierenden Unterdruck in jeder Fluidleitung erzeugen.Device according to one of claims 3 to 5, 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)

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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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EP2246128A3 EP2246128A3 (en) 2012-09-19
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EP2246128B1 (en) 2014-09-17
EP2246128A3 (en) 2012-09-19
DE102009038733B4 (en) 2020-11-12

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