EP1655082B1 - Process and apparatus for cleaning workpieces - Google Patents

Process and apparatus for cleaning workpieces Download PDF

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Publication number
EP1655082B1
EP1655082B1 EP05450179A EP05450179A EP1655082B1 EP 1655082 B1 EP1655082 B1 EP 1655082B1 EP 05450179 A EP05450179 A EP 05450179A EP 05450179 A EP05450179 A EP 05450179A EP 1655082 B1 EP1655082 B1 EP 1655082B1
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EP
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Prior art keywords
nozzles
workpiece
cleaning
group
cleaning chamber
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EP05450179A
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German (de)
French (fr)
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EP1655082A1 (en
Inventor
Hubert Ing. Knoth
Rudolf Knoth-Bambule
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Knoth Automation GmbH
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Knoth Automation GmbH
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Priority claimed from AT0079504U external-priority patent/AT8046U1/en
Application filed by Knoth Automation GmbH filed Critical Knoth Automation GmbH
Priority to PL05450179T priority Critical patent/PL1655082T3/en
Priority to DE202005020926U priority patent/DE202005020926U1/en
Publication of EP1655082A1 publication Critical patent/EP1655082A1/en
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Publication of EP1655082B1 publication Critical patent/EP1655082B1/en
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    • 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
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities

Definitions

  • the invention relates to a method for cleaning workpieces according to the preamble of claim 1
  • a known alternative to manual cleaning are cleaning machines in which the components are first exposed to a liquid cleaning medium and then dried. Such cleaning machines are extremely expensive and costly and cause by the required cycle times a significant slowdown of the production process.
  • the DE 29 36 779 A shows a device for cleaning motor vehicle brakes, in which the brake to be cleaned is covered by a suction hood and is acted upon by movable nozzles with compressed air.
  • a similar device for cleaning air filters is in the US 4,808,234 A described. However, it has been found that in practice such devices are not able to provide sufficient cleaning of workpieces within a short time.
  • the DE 41 27 982 A shows a method according to the preamble of claim 1 and an apparatus according to the preamble of claim 7.
  • the shows DE 195 32 576 A a device for cleaning workpieces, in which the workpiece is rotated in a chamber and is applied to a cleaning medium which is sprayed from a plurality of nozzles.
  • Object of the present invention is to develop the method of the type described above so that even with firmly adhering and difficult to remove impurities within a short time sufficient cleaning is achieved.
  • the noise emissions should be minimized and the risk of injury as well as the pollution of the indoor air should be minimized.
  • the device should be simple and inexpensive to produce and have a small footprint.
  • Another object of the present invention is to provide an apparatus for carrying out such a method.
  • Another essential aspect of the present invention is that the application of the individual jets to the workpiece so that at certain points a sufficiently high energy is achieved to remove even firmly adhering impurities. It is also important that the individual beams are directed in different directions on the workpiece, on the one hand to reach concave or hard to reach area of the workpiece and on the other hand, to facilitate the detachment of firmly adhering residues.
  • the individual beams slide over the workpiece like a spatula and clean it of the adhering residues.
  • cleaning medium primarily compressed air is provided, since this is easily available and inexpensive.
  • other cleaning media such as inert gases, such as nitrogen, when issues of explosion protection or prevention of corrosion are essential.
  • the process of the invention can be used particularly favorably if the pressure of the cleaning medium is between 0.5 bar and 10 bar, preferably between 0.9 bar and 8 bar.
  • Another particularly advantageous embodiment variant of the method according to the invention provides that the workpiece is moved relative to the cleaning chamber. In this way, it is possible to reliably subject all areas of the workpiece to a cleaning and thereby reliably prevent material entrainment in the respective next processing step.
  • the workpiece is rotated inside the cleaning chamber.
  • relatively compact workpieces such as some cylinder heads or the like, it is possible in this way to cause a relative movement of the workpiece within a cleaning chamber, the dimensions of which are not substantially greater than that of the workpiece.
  • a first group of individual jets are directed in an angle against the direction of rotation a second group of individual jets in one direction in the direction of the axis of rotation and a third group of individual jets in the direction of rotation on the workpiece. It has been found that a particularly favorable cleaning effect can be achieved by such a design. In addition to this inclination, the individual rays can also at an angle to the normal plane tilted to the axis of rotation to detect less accessible areas of the workpiece.
  • a translatory movement may also be provided. It is preferably provided that a first group of individual jets are directed at an angle to the direction of movement of a second group of individual beams perpendicular to the direction of movement and a third group of individual jets at an angle in the direction of movement of the workpiece.
  • the relative movement of the type described above by a movement of the workpiece relative to the cleaning chamber or against nozzles for generating the jets done or by a movement of the cleaning chamber or the nozzle relative to the workpiece.
  • blind holes or threaded holes particularly intensely by one or more nozzles inserted into this, moved in them, may be briefly stopped and moved out again.
  • a particular simplification of the method according to the invention is achieved in that the cleaning medium flows freely out of the cleaning chamber. In this way, can be dispensed with a suction or the like.
  • the present invention relates to a device for cleaning workpieces of adhering working media and / or work residues with a cleaning chamber and means for introducing a gaseous cleaning medium.
  • the means for introducing a gaseous cleaning medium are designed as nozzles, which are arranged in at least three groups, and that the nozzles of the at least three groups are directed at different angles on the workpiece.
  • a particularly cost-effective operation of the device is achieved when the nozzles are designed as compressed air nozzles.
  • the structural design of the device according to the invention is particularly advantageous when the nozzles of a group are arranged on at least one common manifold. This design allows a simple conversion of the device when it comes to a new type of workpieces to be cleaned to be rebuilt. A further simplification of the conversion is achieved in that the nozzles are made adjustable.
  • a first preferred embodiment variant of the device according to the invention provides a device for producing a relative movement between the workpiece and the nozzles.
  • This relative movement can be rotational or translatory, as described above.
  • Various variants are possible for producing the relative movement. So on the one hand, the workpiece can be moved within the cleaning chamber. On the other hand, the workpiece may be fixedly mounted in the cleaning chamber, but the nozzles are moved over the workpiece.
  • grid structures are provided in the interior of the cleaning chamber in order to collect and dissipate fluidized spray and liquid parts.
  • the spray which is formed from the blown-off residues, precipitates on the workpiece and this contaminated again.
  • individual liquid droplets which are blown away from the workpiece, bounce off the walls of the cleaning chamber and are thrown back onto the workpiece again.
  • the occurrence of these effects can undesirably increase the required treatment time of the workpiece and reduce the cleaning performance.
  • the above-described grids are provided to which the spray adheres and forms larger drops, so that the spray no longer returns to the workpiece. Furthermore, a rebound of wegspritzenden residue is reliably prevented in this way.
  • a device for producing a relative movement between the workpiece and the nozzles which is designed as a clamping device. In this way, inaccessible point of the workpiece can be achieved by the cleaning medium.
  • the device of FIG. 1 and FIG. 2 consists of a cleaning chamber 1 with a lid 1 a, in which a workpiece 2 is mounted. Laterally of the workpiece 2, three blower strips 3a, 3b, 3c designed as distributor tubes are provided, which are provided with a multiplicity of nozzles 4.
  • the workpiece 2 is held by seats 5 rotatably disposed in the cleaning chamber 1 and driven by a motor 6 to rotate the workpiece 2 about a horizontal axis 8 in the direction of the arrow 7.
  • a first group 4a of nozzles 4 which are directed against the direction of rotation 7 on the workpiece 3, is provided on the first distributor pipes 3a.
  • a second group 4b of nozzles 4 on second distributor pipes 3b is aligned in the direction of the axis 8.
  • a third group 4 c of nozzles 4 on distribution pipes 3 c is directed at an angle in the direction of rotation 7 on the workpiece 2. In this way, recesses, holes, undercut area or the like of the workpiece 2 are reliably cleaned
  • an outflow opening 9 is provided, through which the cleaning medium can flow together with the blown-off working medium.
  • Compressed air generator 11 supply via distribution lines 12, the individual manifolds 3a, 3b, 3c.
  • compressed air networks can be used accordingly.
  • FIG. 3 the construction of a blow bar 3 is shown on an enlarged scale.
  • the blowing strip 3 consists of a box-shaped main body 10, in which a plurality of nozzles 4 is screwed.
  • the outflow direction of the nozzles 4 is adjustable in order to make an adaptation to the respective workpiece 3 easily and quickly.
  • Fig. 4 shows the blow bar of Fig. 3 in detail.
  • the main body 10 has an inner space 14, in which the compressed air is supplied.
  • a plurality of ffernippeln 15 is provided, the discharge openings 17 with axes 15a have.
  • nozzles 4 are placed, which consist of a dome-shaped holding portion 18, a pipe section 19 and a nozzle tip 20 in which a plurality of nozzle openings 21 are provided to form a multi-hole nozzle.
  • the emerging rays are indicated at 22.
  • the nozzles 4 are pivotally supported by union nuts 23 and can be adjusted in this way as needed and adapted to the particular workpiece to be cleaned.
  • FIG. 4 To simplify the illustration, only one nozzle 4 is shown in FIG. 4.
  • the screw nipple 15 are partially closed by closures, not shown, if no nozzle is required at the relevant point.
  • the axis 24a of the nozzle 4 of the first group 4a is inclined at an angle 25a of 25 ° to the axis 15a, wherein the inclination against the direction of movement of the workpiece, which is indicated by the arrow 27.
  • the axis 24b of the unillustrated nozzles 4 of the second group coincides with the axis 15a, and the axis 24c of the third group 4c is inclined at an angle 25c of 25 ° to the axis 15a, the inclination being in the direction of movement of the workpiece.
  • Fig. 5 shows a nozzle tip 20 of a nozzle 4 in detail.
  • further slot-shaped nozzle openings 21b are arranged radially between guide ribs 28.
  • Fig. 6 shows a nozzle 4 from the front, in which a plurality of nozzle openings 21c are arranged side by side.
  • Fig. 7 and Fig. 8 shows a further embodiment of a device according to the invention is shown.
  • the cleaning chamber 1 is designed in the form of a hood, which can be lowered via a lifting device 12 onto a conveyor belt 13, on which the workpiece 2 is transported. Similar to the above-described apparatus, there are provided in the cleaning chamber 1 manifolds 3a, 3b, 3c equipped with nozzles 4 oriented counter to, perpendicular and in the conveying direction. In this embodiment, the cleaning of the workpiece 2 takes place during the transport of the workpiece 2 on the conveyor belt 13, which thus causes the desired relative movement between the workpiece 2 and the nozzle 4.
  • the device according to the invention can be used in virtually all existing processing lines. It is simple in construction and uncomplicated and requires a proper adjustment virtually no control or review.
  • the device requires little energy because the blow-off operations can be adjusted to last only as long as required for rapid and effective cleaning.
  • the inventive system prevents the emission of harmful aerosols and the noise can be avoided on a large scale.
  • the workpieces are absolutely clean in no time and free from residues.

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  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The method involves positioning workpieces (2) in a cleaning chamber (1). The workpieces are subjected with a cleaning medium in the form of gas e.g. compressed air, to blow-off adhesive work media and work residues. The blow-off of the media and residues takes place by a number of individual blasts of the medium on the workpieces. The blasts are directed in three groups on the workpieces with different impinging angles. An independent claim is also included for an apparatus for cleaning adhesive work media and work residues of workpieces.

Description

Die Erfindung betrifft ein Verfahren zur Reinigung von Werkstücken gemäß dem Oberbegriff von Patentanspruch 1The invention relates to a method for cleaning workpieces according to the preamble of claim 1

Bei der Fertigung von komplexen Werkstücken, wie etwas Zylinderköpfen von Brennkraftmaschinen, werden üblicherweise viele verschiedene Bearbeitungsvorgänge hintereinander durchgeführt. Zwischen diesen Arbeitsvorgängen ist es erforderlich, Messvorgänge durchzuführen, um den Arbeitsfortschritt zu überprüfen und eine Qualitätskontrolle zu ermöglichen. Viele der Bearbeitungsvorgänge sind mit einer Verschmutzung des Werkstückes verbunden, was sich beispielsweise darin äußert, dass Kühlmedium oder Hohnöl auf dem Werkstück haftet oder Späne von spanabhebenden Bearbeitungsvorgängen am Werkstück zurückbleiben. Um genaue und unverfälschte Messungen zu ermöglichen, ist es erforderlich, diese Rückstände von den betreffenden Teilen des Werkstückes zu entfernen, was derzeit zumeist in der Weise geschieht, dass die Werkstücke händisch mit Druckluftpistolen angeblasen werden. Problematisch dabei ist, dass auch bei Verwendung von aufwendigen geräuschverminderten Druckluftpistolen eine große Lärmentwicklung auftritt. Darüber hinaus werden bei der händischen Reinigung die anhaftenden Rückstände zerstäubt und stellen so einerseits eine Verletzungsgefahr und andererseits eine Verschmutzung dar, die die Luft am Arbeitsplatz der Person belastet.In the manufacture of complex workpieces, such as some cylinder heads of internal combustion engines, usually many different machining operations are performed one behind the other. Between these operations it is necessary to carry out measuring operations in order to check the work progress and to allow a quality control. Many of the machining operations are associated with contamination of the workpiece, which manifests itself, for example, in the fact that cooling medium or scouring oil adheres to the workpiece or chips of machining operations on the workpiece remain. To enable accurate and unadulterated measurements, it is necessary to remove these residues from the relevant parts of the workpiece, which is currently usually done in such a way that the workpieces are manually blown with compressed air guns. The problem with this is that even when using complex noise-reduced compressed air guns a large noise occurs. In addition, in manual cleaning, the adhering residues are atomized and so on the one hand a risk of injury and on the other hand, a pollution that pollutes the air at the workplace of the person.

Neben diesen Nachteilen ist anzumerken, dass die händische Reinigung, insbesondere bei komplexen Werkstücken, arbeitsintensiv ist und dadurch nicht nur Personalkosten verursacht, sondern auch die Produktion verlangsamt.In addition to these disadvantages, it should be noted that manual cleaning, especially for complex workpieces, is labor-intensive, thereby not only causing labor costs, but also slowing down production.

Eine bekannte Alternative zu händischen Reinigung sind Reinigungsmaschinen, in denen die Bauteile zunächst einem flüssigen Reinigungsmedium ausgesetzt werden und danach getrocknet werden. Solche Reinigungsmaschinen sind extrem aufwendig und kostenintensiv und verursachen durch die erforderlichen Zykluszeiten eine erhebliche Verlangsamung des Produktionsprozesses.A known alternative to manual cleaning are cleaning machines in which the components are first exposed to a liquid cleaning medium and then dried. Such cleaning machines are extremely expensive and costly and cause by the required cycle times a significant slowdown of the production process.

Aus der EP 0 158 904 A ist ein Verfahren und eine Vorrichtung zum Reinigen von Körpern von anhaftendem Staub bekannt. Dabei werden die Körper, wie etwa Metallbehälter für Ton- oder Videobänder, durch eine Reinigungsschleuse transportiert und mit Gebläseluft beaufschlagt. Eine solche Vorrichtung ist zur Reinigung von Gegenständen gut geeignet, wenn die Verunreinigung primär aus Staub besteht. Die Reinigung von Werkstücken, die mit Rückständen, wie etwa Spänen, Honöl oder dergleichen verunreinigt sind, ist mit einer solchen Vorrichtung nicht möglich.From the EP 0 158 904 A For example, a method and apparatus for cleaning bodies of adhering dust is known. The bodies, such as metal containers for audio or video tapes, are transported through a cleaning lock and acted upon by forced air. Such a device is well suited for cleaning articles when the contaminant is primarily dust. The cleaning of workpieces that are contaminated with residues such as chips, honing oil or the like is not possible with such a device.

Die DE 29 36 779 A zeigt eine Vorrichtung zum Reinigen von Kraftfahrzeugbremsen, bei der die zu reinigende Bremse durch eine Absaughaube abgedeckt wird und durch bewegliche Düsen mit Druckluft beaufschlagt wird. Eine ähnliche Vorrichtung zur Reinigung von Luftfiltern ist in der US 4,808,234 A beschrieben. Es hat sich jedoch herausgestellt, dass solche Vorrichtungen in der Praxis nicht in der Lage sind, innerhalb von kurzer Zeit eine ausreichende Reinigung von Werkstücken zu ermöglichen.The DE 29 36 779 A shows a device for cleaning motor vehicle brakes, in which the brake to be cleaned is covered by a suction hood and is acted upon by movable nozzles with compressed air. A similar device for cleaning air filters is in the US 4,808,234 A described. However, it has been found that in practice such devices are not able to provide sufficient cleaning of workpieces within a short time.

Die DE 41 27 982 A zeigt ein Verfahren gemäss dem Oberbegriff des Anspruchs 1 und eine Vorrichtung gemäss dem Oberbegriff des Anspruchs 7.The DE 41 27 982 A shows a method according to the preamble of claim 1 and an apparatus according to the preamble of claim 7.

Weiters zeigt die DE 195 32 576 A eine Einrichtung zum Reinigen von Werkstücken, bei dem das Werkstück in einer Kammer gedreht wird und mit einem Reinigungsmedium beaufschlagt wird, das aus mehreren Düsen aufgesprüht wird.Furthermore, the shows DE 195 32 576 A a device for cleaning workpieces, in which the workpiece is rotated in a chamber and is applied to a cleaning medium which is sprayed from a plurality of nozzles.

Aufgabe der vorliegenden Erfindung ist es, das Verfahren der oben beschriebenen Art so weiterzubilden, dass auch bei fest anheftenden und schwierig zu entfernenden Verunreinigungen innerhalb kurzer Zeit eine ausreichende Reinigung erzielt wird. Dabei sollen die Geräuschemissionen minimiert werden und das Verletzungsrisiko, sowie die Verschmutzung der Raumluft soll minimiert werden. Weiters soll die Vorrichtung einfach und kostengünstig herstellbar sein und einen geringen Platzbedarf aufweisen.Object of the present invention is to develop the method of the type described above so that even with firmly adhering and difficult to remove impurities within a short time sufficient cleaning is achieved. The noise emissions should be minimized and the risk of injury as well as the pollution of the indoor air should be minimized. Furthermore, the device should be simple and inexpensive to produce and have a small footprint.

Eine weitere Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zur Durchführung eines solchen Verfahrens anzugeben.Another object of the present invention is to provide an apparatus for carrying out such a method.

Erfindungsgemäß werden diese Aufgaben durch die Merkmale von den Patentansprüche 1 und 7 gelöst. Durch die absenkbare Reinigungskammer kann der Verfahrensablauf optimiert werden, da der Werkstückwechsel besonders wenig Zeit in Anspruch nimmt.According to the invention, these objects are achieved by the features of claims 1 and 7. Due to the lowerable cleaning chamber, the procedure be optimized because the workpiece change takes very little time.

Ein weiterer wesentlicher Aspekt der vorliegenden Erfindung ist es, dass die Beaufschlagung des Werkstückes durch die Einzelstrahlen so erfolgt, dass punktuell eine ausreichend hohe Energie erzielt wird, um auch fest anhaftende Verunreinigungen abzutragen. Weiters ist wichtig, dass die einzelnen Strahlen in verschiedenen Richtungen auf das Werkstück gerichtet werden, um einerseits auch konkave oder schwer zugängliche Bereich des Werkstückes zu erreichen und andererseits, um die Ablösung von fest anhaftenden Rückständen zu erleichtern.Another essential aspect of the present invention is that the application of the individual jets to the workpiece so that at certain points a sufficiently high energy is achieved to remove even firmly adhering impurities. It is also important that the individual beams are directed in different directions on the workpiece, on the one hand to reach concave or hard to reach area of the workpiece and on the other hand, to facilitate the detachment of firmly adhering residues.

Bei dem erfindungsgemäßen Verfahren schieben sich die einzelnen Strahlen wie eine Spachtel über das Werkstück und reinigen es von den anhaftenden Rückständen.In the method according to the invention, the individual beams slide over the workpiece like a spatula and clean it of the adhering residues.

Als Reinigungsmedium im Sinne der Erfindung ist primär Druckluft vorgesehen, da diese leicht verfügbar und kostengünstig ist. Für spezielle Anwendungen kann es aber auch angezeigt sein, andere Reinigungsmedien einzusetzen, wie beispielsweise Inertgase, wie etwa Stickstoff, wenn Fragen des Explosionsschutzes oder der Verhinderung von Korrosion wesentlich sind.As a cleaning medium according to the invention primarily compressed air is provided, since this is easily available and inexpensive. For special applications, however, it may also be appropriate to use other cleaning media, such as inert gases, such as nitrogen, when issues of explosion protection or prevention of corrosion are essential.

Das erfindungsgemäße Verfahren kann besonders günstig eingesetzt werden, wenn der Druck des Reinigungsmediums zwischen 0,5 bar und 10 bar, vorzugsweise zwischen 0,9 bar und 8 bar beträgt.The process of the invention can be used particularly favorably if the pressure of the cleaning medium is between 0.5 bar and 10 bar, preferably between 0.9 bar and 8 bar.

Eine weitere besonders begünstigte Ausführungsvariante des erfindungsgemäßen Verfahrens sieht vor, dass das Werkstück relativ zur Reinigungskammer bewegt wird. Auf diese Weise ist es möglich, alle Bereiche des Werkstückes zuverlässig einer Reinigung zu unterziehen und dadurch eine Materialverschleppung in den jeweilig nächsten Bearbeitungsschritt zuverlässig zu verhindern. In einer ersten Ausführungsvariante des Verfahrens, das eine Relativbewegung vorsieht, wird das Werkstück im Inneren der Reinigungskammer gedreht. Bei relativ kompakten Werkstücken, wie etwas Zylinderköpfen oder dergleichen, ist es auf diese Weise möglich, eine Relativbewegung des Werkstückes innerhalb einer Reinigungskammer zu bewirken, deren Abmessungen nicht wesentlich größer als die des Werkstückes sind. Besonders günstig ist es dabei, wenn eine erste Gruppe von Einzelstrahlen in einem Winkel gegen die Drehrichtung eine zweite Gruppe von Einzelstrahlen in einer Richtung in Richtung der Drehachse und eine dritte Gruppe von Einzelstrahlen in Drehrichtung auf das Werkstück gerichtet werden. Es hat sich herausgestellt, dass durch eine solche Ausbildung eine besonders günstige Reinigungswirkung erzielt werden kann. Zusätzlich zu dieser Neigung können die Einzelstrahlen auch noch in einem Winkel gegenüber der Normalebene zur Drehachse geneigt sein, um schwerer zugängliche Bereiche des Werkstückes zu erfassen.Another particularly advantageous embodiment variant of the method according to the invention provides that the workpiece is moved relative to the cleaning chamber. In this way, it is possible to reliably subject all areas of the workpiece to a cleaning and thereby reliably prevent material entrainment in the respective next processing step. In a first embodiment of the method, which provides a relative movement, the workpiece is rotated inside the cleaning chamber. In relatively compact workpieces, such as some cylinder heads or the like, it is possible in this way to cause a relative movement of the workpiece within a cleaning chamber, the dimensions of which are not substantially greater than that of the workpiece. It is particularly advantageous if a first group of individual jets are directed in an angle against the direction of rotation a second group of individual jets in one direction in the direction of the axis of rotation and a third group of individual jets in the direction of rotation on the workpiece. It has been found that a particularly favorable cleaning effect can be achieved by such a design. In addition to this inclination, the individual rays can also at an angle to the normal plane tilted to the axis of rotation to detect less accessible areas of the workpiece.

Alternativ zur Drehung des Werkstückes kann auch eine translatorische Bewegung vorgesehen sein. Dabei ist vorzugsweise vorgesehen, dass eine erste Gruppe von Einzelstrahlen in einen Winkel gegen die Bewegungsrichtung eine zweite Gruppe von Einzelstrahlen senkrecht zur Bewegungsrichtung und eine dritte Gruppe von Einzelstrahlen in einem Winkel in Bewegungsrichtung auf das Werkstück gerichtet werden. Grundsätzlich kann die Relativbewegung der oben beschriebenen Art durch eine Bewegung des Werkstückes gegenüber der Reinigungskammer oder gegenüber von Düsen zur Erzeugung der Strahlen erfolgen oder aber auch durch eine Bewegung der Reinigungskammer bzw. der Düsen gegenüber dem Werkstück.Alternatively to the rotation of the workpiece, a translatory movement may also be provided. It is preferably provided that a first group of individual jets are directed at an angle to the direction of movement of a second group of individual beams perpendicular to the direction of movement and a third group of individual jets at an angle in the direction of movement of the workpiece. Basically, the relative movement of the type described above by a movement of the workpiece relative to the cleaning chamber or against nozzles for generating the jets done or by a movement of the cleaning chamber or the nozzle relative to the workpiece.

Es ist auch möglich, Sacklöcher oder Gewindebohrungen besonders intensiv zu reinigen, indem eine oder mehrere Düsen in diese eingeführt, in ihnen bewegt, unter Umständen kurz angehalten und wieder herausbewegt werden.It is also possible to clean blind holes or threaded holes particularly intensely by one or more nozzles inserted into this, moved in them, may be briefly stopped and moved out again.

Eine besondere Vereinfachung des erfindungsgemäßen Verfahrens wird dadurch erzielt, dass das Reinigungsmedium frei aus der Reinigungskammer ausströmt. Auf diese Weise kann auf eine Absaugung oder dergleichen verzichtet werden.A particular simplification of the method according to the invention is achieved in that the cleaning medium flows freely out of the cleaning chamber. In this way, can be dispensed with a suction or the like.

Weiters betrifft die vorliegende Erfindung eine Vorrichtung zur Reinigung von Werkstücken von anhaftenden Arbeitsmedien und/oder Arbeitsrückständen mit einer Reinigungskammer und mit Mitteln zum Einbringen eines gasförmigen Reinigungsmediums. Zur Erfüllung der oben beschriebenen Aufgaben ist erfindungsgemäß vorgesehen, dass die Mittel zum Einbringen eines gasförmigen Reinigungsmediums als Düsen ausgebildet sind, die mindestens in drei Gruppen angeordnet sind, und dass die Düsen der mindestens drei Gruppen in unterschiedlichen Winkeln auf das Werkstück gerichtet sind. Wie oben beschrieben, können mit der erfindungsgemäßen Vorrichtung nicht nur Lärmemissionen und eine Verunreinigung der Arbeitsluft vermieden werden, sondern es können auch mit relativ geringem Aufwand Materialverschleppungen selbst dann vermieden werden, wenn fest anhaftende Rückstände vorliegen.Furthermore, the present invention relates to a device for cleaning workpieces of adhering working media and / or work residues with a cleaning chamber and means for introducing a gaseous cleaning medium. To fulfill the above-described objects, it is provided according to the invention that the means for introducing a gaseous cleaning medium are designed as nozzles, which are arranged in at least three groups, and that the nozzles of the at least three groups are directed at different angles on the workpiece. As described above, not only noise emissions and contamination of the working air can be avoided with the device according to the invention, but it can even with relatively little effort material entrainment be avoided even if there are firmly adhering residues.

Ein besonders kostengünstiger Betrieb der Vorrichtung wird erreicht, wenn die Düsen als Druckluftdüsen ausgebildet sind.A particularly cost-effective operation of the device is achieved when the nozzles are designed as compressed air nozzles.

Der konstruktive Aufbau der erfindungsgemäßen Vorrichtung ist besonders günstig, wenn die Düsen einer Gruppe auf mindestens einem gemeinsamen Verteilerrohr angeordnet sind. Diese Ausbildung ermöglicht einen einfachen Umbau der Vorrichtung, wenn diese auf einen neuen Typ von zu reinigenden Werkstücken umgebaut werden soll. Eine weitere Vereinfachung der Umrüstung wird dadurch erzielt, dass die Düsen einstellbar ausgeführt sind.The structural design of the device according to the invention is particularly advantageous when the nozzles of a group are arranged on at least one common manifold. This design allows a simple conversion of the device when it comes to a new type of workpieces to be cleaned to be rebuilt. A further simplification of the conversion is achieved in that the nozzles are made adjustable.

Eine erste bevorzugte Ausführungsvariante der erfindungsgemäßen Vorrichtung sieht eine Einrichtung zu Herstellung einer Relativbewegung zwischen dem Werkstück und den Düsen vor. Diese Relativbewegung kann wie oben beschrieben rotatorisch oder translatorisch sein. Zur Herstellung der Relativbewegung sind verschiedene Varianten möglich. So kann einerseits das Werkstück innerhalb der Reinigungskammer bewegt werden. Andererseits kann das Werkstück in der Reinigungskammer fest gelagert sein, wobei jedoch die Düsen über das Werkstück bewegt werden.A first preferred embodiment variant of the device according to the invention provides a device for producing a relative movement between the workpiece and the nozzles. This relative movement can be rotational or translatory, as described above. Various variants are possible for producing the relative movement. So on the one hand, the workpiece can be moved within the cleaning chamber. On the other hand, the workpiece may be fixedly mounted in the cleaning chamber, but the nozzles are moved over the workpiece.

Vorzugsweise sind im Inneren der Reinigungskammer Gitterstrukturen vorgesehen, um aufgewirbelten Sprühnebel und Flüssigkeitsteilen aufzufangen und abzuleiten. Grundsätzlich besteht die Gefahr, dass sich der Sprühnebel, der sich aus den weggeblasenen Rückständen bildet, am Werkstück niederschlägt und dieses erneut verunreinigt. Weiters ist es möglich, dass einzelne Flüssigkeitströpfchen, die vom Werkstück weggeblasen werden, an den Wänden der Reinigungskammer abprallen und wieder auf das Werkstück zurückgeschleudert werden. Das Auftreten dieser Effekte kann die erforderliche Behandlungsdauer des Werkstückes in unerwünschter Weise vergrößern und die Reinigungsleistung verringern. Um dies zu vermeiden, sind die oben beschriebenen Gitter vorgesehen, an denen der Sprühnebel anhaftet und größere Tropfen bildet, so dass der Sprühnebel nicht mehr zu Werkstück zurückkehrt. Weiters wird auf diese Weise ein Zurückprallen von wegspritzenden Rückstandstropfen sicher verhindert.Preferably, grid structures are provided in the interior of the cleaning chamber in order to collect and dissipate fluidized spray and liquid parts. In principle, there is a risk that the spray, which is formed from the blown-off residues, precipitates on the workpiece and this contaminated again. Furthermore, it is possible that individual liquid droplets, which are blown away from the workpiece, bounce off the walls of the cleaning chamber and are thrown back onto the workpiece again. The occurrence of these effects can undesirably increase the required treatment time of the workpiece and reduce the cleaning performance. To avoid this, the above-described grids are provided to which the spray adheres and forms larger drops, so that the spray no longer returns to the workpiece. Furthermore, a rebound of wegspritzenden residue is reliably prevented in this way.

Es ist von besonderem Vorteil, wenn eine Einrichtung zur Herstellung einer Relativbewegung zwischen dem Werkstück und den Düsen vorgesehen ist, die als Spanneinrichtung ausgebildet ist. Auf diese Weise können auch unzugängliche Stelle des Werkstücks durch das Reinigungsmedium erreicht werden.It is of particular advantage if a device for producing a relative movement between the workpiece and the nozzles is provided, which is designed as a clamping device. In this way, inaccessible point of the workpiece can be achieved by the cleaning medium.

Von besonderem Vorteil ist es, eine bewegliche Lagerung der Düsen vorzusehen. Durch eine solche bewegliche Lagerung können Anpassungen an das jeweilige Werkstück während des Betriebs leicht vorgenommen werden, wenn sich herausstellt, dass das Reinigungsergebnis in Teilbereichen unbefriedigend ist.It is particularly advantageous to provide a movable mounting of the nozzles. By such a movable storage adjustments to the respective workpiece during operation can be easily made if it turns out that the cleaning result in some areas is unsatisfactory.

In der Folge wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Es zeigen schematisch:

Fig. 1
einen Schnitt durch eine erste Ausführungsvariante einer erfindungsgemäßen Vorrichtung;
Fig. 2
einen Schnitt nach Linie II-II in Fig. 1;
Fig. 3
ein Detail einer erfindungsgemäßen Vorrichtung in einer axonometrischen Darstellung in vergrößertem Maßstab;
Fig. 4
ein weiteres Detail einer erfindungsgemäßen Vorrichtung im Schnitt;
Fig. 5
und Fig. 6 Details von Düsen;
Fig. 7
eine weitere Ausführungsvariante der Erfindung im Schnitt; und
Fig. 8
einen Schnitt nach Linie VIII-VIII in Fig. 1.
In the following, the invention will be explained in more detail with reference to the embodiments illustrated in FIGS. They show schematically:
Fig. 1
a section through a first embodiment of a device according to the invention;
Fig. 2
a section along line II-II in Fig. 1;
Fig. 3
a detail of a device according to the invention in an axonometric representation on an enlarged scale;
Fig. 4
a further detail of a device according to the invention in section;
Fig. 5
and Fig. 6 details of nozzles;
Fig. 7
a further embodiment of the invention in section; and
Fig. 8
a section along line VIII-VIII in Fig. 1st

Die Vorrichtung der Fig. 1 und Fig. 2 besteht aus einer Reinigungskammer 1 mit einem Deckel 1a, in der ein Werkstück 2 gelagert ist. Seitlich des Werkstückes 2 sind jeweils drei als Verteilerrohre ausgebildete Blasleisten 3a, 3b, 3c vorgesehen, die mit einer Vielzahl von Düsen 4 versehen sind. Das Werkstück 2 ist von Aufnahmen 5 gehalten, die drehbar in der Reinigungskammer 1 angeordnet sind und von einem Motor 6 angetrieben sind, um das Werkstück 2 um eine waagrechte Achse 8 in der Richtung des Pfeils 7 zu drehen. Auf ersten Verteilerrohren 3a ist jeweils eine erste Gruppe 4a von Düsen 4 vorgesehen, die entgegen der Drehrichtung 7 auf das Werkstück 3 gerichtet sind. Eine zweite Gruppe 4b von Düsen 4 auf zweiten Verteilerrohren 3b ist in Richtung der Achse 8 ausgerichtet. Eine dritte Gruppe 4c von Düsen 4 auf Verteilerrohren 3c ist in einem Winkel in Richtung der Drehrichtung 7 auf das Werkstück 2 gerichtet. Auf diese Weise werden auch Ausnehmungen, Bohrungen, hinterschnittene Bereich oder dergleichen des Werkstücks 2 zuverlässig gereinigt.The device of FIG. 1 and FIG. 2 consists of a cleaning chamber 1 with a lid 1 a, in which a workpiece 2 is mounted. Laterally of the workpiece 2, three blower strips 3a, 3b, 3c designed as distributor tubes are provided, which are provided with a multiplicity of nozzles 4. The workpiece 2 is held by seats 5 rotatably disposed in the cleaning chamber 1 and driven by a motor 6 to rotate the workpiece 2 about a horizontal axis 8 in the direction of the arrow 7. In each case a first group 4a of nozzles 4, which are directed against the direction of rotation 7 on the workpiece 3, is provided on the first distributor pipes 3a. A second group 4b of nozzles 4 on second distributor pipes 3b is aligned in the direction of the axis 8. A third group 4 c of nozzles 4 on distribution pipes 3 c is directed at an angle in the direction of rotation 7 on the workpiece 2. In this way, recesses, holes, undercut area or the like of the workpiece 2 are reliably cleaned.

Im unteren Bereich der Reinigungskammer 1 ist eine Ausströmöffnung 9 vorgesehen, durch die das Reinigungsmedium zusammen mit dem abgeblasenen Arbeitsmedium ausströmen kann.In the lower region of the cleaning chamber 1, an outflow opening 9 is provided, through which the cleaning medium can flow together with the blown-off working medium.

Drucklufterzeuger 11 versorgen über Verteilungsleitungen 12 die einzelnen Verteilerrohre 3a, 3b, 3c. Selbstverständlich können bestehende Druckluftnetze entsprechend genutzt werden.Compressed air generator 11 supply via distribution lines 12, the individual manifolds 3a, 3b, 3c. Of course, existing compressed air networks can be used accordingly.

In Fig. 3 ist der Aufbau einer Blasleiste 3 in vergrößertem Maßstab dargestellt. Die Blasleiste 3 besteht aus einem kastenförmigen Grundkörper 10, in dem eine Vielzahl von Düsen 4 eingeschraubt ist. Die Ausströmrichtung der Düsen 4 ist einstellbar, um eine Anpassung an das jeweilige Werkstück 3 leicht und schnell vornehmen zu können.In Fig. 3, the construction of a blow bar 3 is shown on an enlarged scale. The blowing strip 3 consists of a box-shaped main body 10, in which a plurality of nozzles 4 is screwed. The outflow direction of the nozzles 4 is adjustable in order to make an adaptation to the respective workpiece 3 easily and quickly.

Fig. 4 zeigt die Blasleiste von Fig. 3 im Detail. Der Grundkörper 10 besitzt einen Innenraum 14, in dem die Druckluft zugeführt wird. An der Oberseite 16 ist eine Vielzahl von Schraubnippeln 15 vorgesehen, die Ausströmöffnungen 17 mit Achsen 15a aufweisen. Auf den Schraubnippeln 15 sind Düsen 4 aufgesetzt, die aus einem kalottenförmigen Halteabschnitt 18, einem Rohrabschnitt 19 und einer Düsenspitze 20 bestehen, in dem mehrere Düsenöffnungen 21 vorgesehen sind, um eine Mehrlochdüse zu bilden. Die austretenden Strahlen sind mit 22 angedeutet. Die Düsen 4 sind durch Überwurfmuttern 23 schwenkbar gehalten und können auf diese Weise nach Bedarf eingestellt und an das jeweils zu reinigende Werkstück angepasst werden.Fig. 4 shows the blow bar of Fig. 3 in detail. The main body 10 has an inner space 14, in which the compressed air is supplied. At the top 16 a plurality of Schraubnippeln 15 is provided, the discharge openings 17 with axes 15a have. On the Schraubnippeln 15 nozzles 4 are placed, which consist of a dome-shaped holding portion 18, a pipe section 19 and a nozzle tip 20 in which a plurality of nozzle openings 21 are provided to form a multi-hole nozzle. The emerging rays are indicated at 22. The nozzles 4 are pivotally supported by union nuts 23 and can be adjusted in this way as needed and adapted to the particular workpiece to be cleaned.

Zur Vereinfachung der Darstellung ist in der Fig. 4 nur eine Düse 4 eingezeichnet. In der Praxis werden die Schraubnippel 15 teilweise durch nicht dargestellte Verschlüsse verschlossen, wenn an der betreffenden Stelle keine Düse erforderlich ist. Die Achse 24a der Düse 4 aus der ersten Gruppe 4a ist in einem Winkel 25a von 25° zur Achse 15a geneigt, wobei die Neigung gegen die Bewegungsrichtung des Werkstücks, die mit dem Pfeil 27 angedeutet ist.To simplify the illustration, only one nozzle 4 is shown in FIG. 4. In practice, the screw nipple 15 are partially closed by closures, not shown, if no nozzle is required at the relevant point. The axis 24a of the nozzle 4 of the first group 4a is inclined at an angle 25a of 25 ° to the axis 15a, wherein the inclination against the direction of movement of the workpiece, which is indicated by the arrow 27.

Die Achse 24b der nicht dargestellten Düsen 4 der zweiten Gruppe fällt mit der Achse 15a zusammen, und die Achse 24c der dritten Gruppe 4c ist in einem Winkel 25c von 25° zur Achse 15a geneigt, wobei die Neigung in Bewegungsrichtung des Werkstücks erfolgt.The axis 24b of the unillustrated nozzles 4 of the second group coincides with the axis 15a, and the axis 24c of the third group 4c is inclined at an angle 25c of 25 ° to the axis 15a, the inclination being in the direction of movement of the workpiece.

Zusätzlich zu der oben beschriebenen Neigung in oder gegen die Bewegungsrichtung kann eine weitere Neigung senkrecht dazu, also um eine in der Zeichenebene liegende Achse 26a, die senkrecht auf die Achse 24a ist, vorliegen.In addition to the above-described inclination in or against the direction of movement, there may be a further inclination perpendicular thereto, ie about an axis 26a lying in the plane of the drawing, which is perpendicular to the axis 24a.

Fig. 5 zeigt eine Düsenspitze 20 einer Düse 4 im Detail. Neben einer zentralen Düsenöffnung 21a sind weitere schlitzförmige Düsenöffnungen 21b radial zwischen Leitrippen 28 angeordnet.Fig. 5 shows a nozzle tip 20 of a nozzle 4 in detail. In addition to a central nozzle opening 21a, further slot-shaped nozzle openings 21b are arranged radially between guide ribs 28.

Fig. 6 zeigt eine Düse 4 von vorne, bei der mehrere Düsenöffnungen 21c nebeneinander angeordnet sind.Fig. 6 shows a nozzle 4 from the front, in which a plurality of nozzle openings 21c are arranged side by side.

In Fig. 7 und Fig. 8 ist eine weitere Ausführungsvariante einer erfindungsgemäßen Vorrichtung dargestellt. Die Reinigungskammer 1 ist dabei in Form einer Haube ausgebildet, die über eine Hebevorrichtung 12 auf ein Förderband 13 absenkbar ist, auf dem das Werkstück 2 transportiert wird. Ähnlich wie bei der oben beschriebenen Vorrichtung sind in der Reinigungskammer 1 Verteilerrohre 3a, 3b, 3c vorgesehen, die mit Düsen 4 ausgestattet sind, die gegen, senkrecht und in Förderrichtung orientiert sind. Bei dieser Ausführungsvariante erfolgt die Reinigung des Werkstückes 2 während des Transportes des Werkstückes 2 auf dem Förderband 13, das somit die erwünschte Relativbewegung zwischen dem Werkstück 2 und den Düsen 4 bewirkt.In Fig. 7 and Fig. 8 shows a further embodiment of a device according to the invention is shown. The cleaning chamber 1 is designed in the form of a hood, which can be lowered via a lifting device 12 onto a conveyor belt 13, on which the workpiece 2 is transported. Similar to the above-described apparatus, there are provided in the cleaning chamber 1 manifolds 3a, 3b, 3c equipped with nozzles 4 oriented counter to, perpendicular and in the conveying direction. In this embodiment, the cleaning of the workpiece 2 takes place during the transport of the workpiece 2 on the conveyor belt 13, which thus causes the desired relative movement between the workpiece 2 and the nozzle 4.

Die erfindungsgemäße Vorrichtung kann in praktisch allen bestehenden Bearbeitungslinien eingesetzt werden. Sie ist im Aufbau einfach und unkompliziert und bedarf nach einer richtigen Justierung praktisch keiner Kontrolle oder Überprüfung. Die Vorrichtung benötigt wenig Energie, da die Abblasvorgänge so eingestellt werden können, dass sie nur so lange dauern, wie für eine rasche und effektive Reinigung erforderlich ist. Durch die erfindungsgemäße Anlage wird die Emission von gesundheitsgefährlichen Aerosolen verhindert und die Lärmentwicklung kann in großem Umfang vermieden werden. Die Werkstücke sind in kürzester Zeit absolut sauber und frei von Rückständen.The device according to the invention can be used in virtually all existing processing lines. It is simple in construction and uncomplicated and requires a proper adjustment virtually no control or review. The device requires little energy because the blow-off operations can be adjusted to last only as long as required for rapid and effective cleaning. The inventive system prevents the emission of harmful aerosols and the noise can be avoided on a large scale. The workpieces are absolutely clean in no time and free from residues.

Claims (14)

  1. A method for cleaning workpieces (2) from adhering working media and/or work residues, in which the workpieces (2) are introduced into a cleaning chamber (1) and are subjected in the cleaning chamber (1) to a gaseous cleaning medium in order to blow off the adhering working media and/or work residue, with the blowing off occurring by means of a plurality of individual jets (22) which are directed in at least three groups onto the workpiece (2), and with the nozzles (4) of the at least three groups (4a, 4b, 4c) being directed in different angles onto the workpiece (2), characterized in that the cleaning chamber (1) for performing the cleaning process is lowered onto a conveying device (13) for conveying workpieces (2).
  2. A method according to claim 1, wherein compressed air is used as a cleaning medium and the pressure of the cleaning medium is between 0.5 bar and 10 bar, preferably between 0.9 bar and 8 bar.
  3. A method according to one of the claims 1 to 2, wherein the workpiece (2) is moved relative to the cleaning chamber (1) and is turned preferably within the cleaning chamber (1).
  4. A method according to claim 3, wherein a first group of individual jets are directed at the workpiece (2) at an angle against the direction of rotation (7), a second group of individual jets directed in the direction of the rotational axis and a third group of individual jets at an angle in the direction of rotation.
  5. A method according to claim 2, wherein the workpiece (2) is moved in a translatory manner relative to the cleaning chamber (1).
  6. A method according to claim 5, wherein a first group of individual jets are directed against the workpiece (2) at an angle against the direction of movement, a second group of individual jets perpendicular to the direction of movement and a third group of individual jets at an angle in the direction of movement.
  7. An apparatus for cleaning workpieces (2) from adhering working media and/or work residues, comprising a cleaning chamber (1) and means for introducing a gaseous cleaning medium which are arranged as nozzles (4) disposed at least in three groups (4a, 4b, 4c), with the nozzles (4) of the at least three groups (4a, 4b, 4c) being directed against the workpiece (2) in different angles, characterized in that the cleaning chamber (1) is arranged to be lowerable onto a conveying device (13) for conveying workpieces (2).
  8. An apparatus according to claim 7, wherein the nozzles (4) are arranged as compressed-air nozzles, preferably as adjustable multi-hole nozzles.
  9. An apparatus according to one of the claims 7 or 8, wherein the nozzles (4) of a group are arranged on at least one common distributor pipe.
  10. An apparatus according to claim 9, wherein the nozzles (4) of a first group (4a) are inclined at an angle (25a) of approximately 25° relative to a normal line (15a) on the distributor pipe (3), that the nozzles (4) of a second group (4b) are parallel to a normal line (15a) on the distributor pipe (3) and that the nozzles (4) of a third group (4c) are inclined at an angle (25c) of between 10° and 35° to a normal line (15a) on the distributor pipe (3) opposite of the nozzles (4) of a first group (4a).
  11. An apparatus according to one of the claims 7 to 10, wherein a device for causing a relative movement is provided between the workpiece (2) and the nozzles (4), which device is arranged as a clamping device.
  12. An apparatus according to one of the claims 7 to 11, wherein a movable bearing of the nozzles (4) is provided.
  13. An apparatus according to one of the claims 7 to 12, wherein the cleaning chamber (1) comprises an outflow opening for the cleaning medium.
  14. An apparatus according to one of the claims 1 to 13, wherein grating structures are provided in the interior of the cleaning chamber (1) in order to catch swirling spray mist and liquid particles and to discharge the same.
EP05450179A 2004-11-04 2005-11-03 Process and apparatus for cleaning workpieces Active EP1655082B1 (en)

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PL05450179T PL1655082T3 (en) 2004-11-04 2005-11-03 Process and apparatus for cleaning workpieces
DE202005020926U DE202005020926U1 (en) 2004-11-04 2005-11-03 Workpiece`s e.g. cylinder head of internal combustion engine, adhesive work media and work residues cleaning method, involves subjecting workpieces with cleaning medium in gas form to blow-off work media and residues by blasts of medium

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AT0079504U AT8046U1 (en) 2004-11-04 2004-11-04 PROCESS FOR CLEANING WORKPIECES
AT0118805A AT500610B1 (en) 2004-11-04 2005-07-14 PROCESS FOR CLEANING WORKPIECES

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DE102010061115A1 (en) 2009-12-15 2011-07-28 Knoth, Hubert, Ing. Device for cleaning and cooling workpieces
DE102010016038B4 (en) * 2009-03-24 2016-09-01 Hubert Knoth Apparatus and method for cleaning and cooling workpieces

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DE102006039035B4 (en) 2006-08-19 2023-06-01 Werner Meissner Process for surface treatment of a workpiece in the treatment chamber of an industrial cleaning plant
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AT514185B1 (en) 2013-03-15 2016-07-15 Ka Group Man Gmbh Process for cleaning workpieces
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DE102010016038B4 (en) * 2009-03-24 2016-09-01 Hubert Knoth Apparatus and method for cleaning and cooling workpieces
DE102010061115A1 (en) 2009-12-15 2011-07-28 Knoth, Hubert, Ing. Device for cleaning and cooling workpieces
AT509238B1 (en) * 2009-12-15 2011-11-15 Hubert Ing Knoth DEVICE FOR CLEANING AND COOLING WORKPIECES
DE102010061115B4 (en) * 2009-12-15 2017-03-23 Hubert Knoth Device for cleaning and cooling workpieces

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AT500610A4 (en) 2006-02-15
AT500610B1 (en) 2006-02-15
EP1655082A1 (en) 2006-05-10
ATE364455T1 (en) 2007-07-15
PL1655082T3 (en) 2007-11-30
DE502005000854D1 (en) 2007-07-26

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