EP1394757B1 - Sensor device for a painting installation - Google Patents

Sensor device for a painting installation Download PDF

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Publication number
EP1394757B1
EP1394757B1 EP03019861A EP03019861A EP1394757B1 EP 1394757 B1 EP1394757 B1 EP 1394757B1 EP 03019861 A EP03019861 A EP 03019861A EP 03019861 A EP03019861 A EP 03019861A EP 1394757 B1 EP1394757 B1 EP 1394757B1
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EP
European Patent Office
Prior art keywords
transmitter
receiver
sensor
coating system
rotary atomizer
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EP03019861A
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German (de)
French (fr)
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EP1394757A2 (en
EP1394757A3 (en
Inventor
Michael Baumann
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Duerr Systems AG
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Duerr Systems AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0422—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces comprising means for controlling speed of rotation

Definitions

  • the invention relates to a coating system with a sensor arrangement.
  • Rotary atomizers are known to be used in modern paint shops, in which a so-called bell plate is driven by a compressed air turbine at high speeds.
  • the bell cup is in this case usually frusto-conical and expands in spray direction, wherein the coating agent to be applied is accelerated axially and in particular radially in the frusto-conical bell cup due to the centrifugal forces, so that a cone-shaped spray jet is produced at the bell plate tear-off.
  • optical waveguides are relatively susceptible to fracture, which can lead to a malfunction of the rotational speed measurement in the event of excessive mechanical stress on the sensor arrangement.
  • the invention is therefore based on the object to improve the known sensor arrangement described above to the extent that a larger component modularity is possible, the mechanical load capacity should be as large as possible.
  • the invention includes the general technical teaching to provide a transmitter and a receiver for transmitting the sensor signal, wherein there is a wireless connection between the transmitter and the receiver.
  • the inventive use of a wireless connection with a transmitter and a receiver advantageously allows an arrangement of the sensor in a movable component of a coating system, whereas the sensor in the known sensor arrangement described above is arranged stationary and connected via optical fibers with the movable rotary atomizer.
  • the senor is thus attached to a moving part of the coating system, while the receiver is arranged stationary.
  • the relative movement thus occurring between the transmitter and the receiver during the operation of the coating system does not result in a mechanical load on the connection or a mechanical wear, since the connection between the transmitter and the receiver is wireless.
  • the transmitter is a radio transmitter and, at the receiver, is a radio receiver, wherein there is a wireless radio link between the radio transmitter and the radio receiver.
  • the transmitter is an optical transmitter and the receiver is an optical receiver, wherein there is a line of sight connection between the optical transmitter and the optical receiver.
  • the transmitter can be used to transmit the sensor signals, an infrared transmitter whose signal is picked up by an infrared receiver.
  • the transmitter is an acoustic transmitter and the receiver is an acoustic receiver.
  • an ultrasonic transmitter can be used for transmitting the sensor signals, the signal of which is detected by an ultrasonic receiver.
  • the wireless connection between the transmitter and the receiver allows electrical isolation, so that the transmitter on the one hand and the receiver on the other hand can be at different electrical potentials.
  • This is particularly advantageous when used in an electrostatic coating system with a rotary atomizer, since the rotary atomizer is usually at high voltage potential while the workpieces to be coated are earthed.
  • the transmitter can therefore also be at a high voltage potential in the sensor arrangement according to the invention, while the receiver is at a low-voltage potential or at a ground potential.
  • the sensor is a pressure sensor which measures a print size of the coating installation, for example the pressure of a medium (air, coating agent, solvent) of the coating installation.
  • a medium air, coating agent, solvent
  • FIG. 1 The cross-sectional view shown is a rotary atomizer 19, which is constructed to a large extent conventional, so that reference is made to supplement the following description on the relevant prior art.
  • the rotary atomizer 19 For mounting the rotary atomizer 19 has this on its mounting-side end face a mounting flange 20 with a mounting pin 21, which allows a mechanical attachment to a robot arm of a painting robot.
  • a conventional frustoconical bell cup 22 may be attached, which is shown here only in dashed lines and is driven in operation of the rotary atomizer 19 by a compressed air turbine 23 at a high speed.
  • the rotation of the bell cup 22 in this case means that the introduced into the interior of the bell cup 22 coating agent is axially and in particular radially accelerated and sprayed on a Glockentellerabrisskante.
  • the drive of the compressed air turbine 23 takes place here by compressed air, which is guided by the painting robot via the mounting flange 20, wherein the supply of the drive air is not shown here for simplicity.
  • a so-called shaping air ring 24 is furthermore provided, which in the bell-plate-side end face of a housing 25 of the rotary atomizer 19 is arranged.
  • a plurality of axially directed shaping air nozzles 26, 27 are arranged, via which, during operation of the rotary atomizer 19, a directing air flow can be blown axially outwardly onto the conical circumferential surface of the bell cup 22.
  • the spray jet is thus formed and the desired jet width is set.
  • the supply of the shaping air for the two shaping air nozzles 26, 27 takes place here by a respective flange opening 28, 29, which are arranged in the mounting flange 20 of the rotary atomizer 19.
  • the position of the flange openings 28, 29 within the end face of the mounting flange 20 is predetermined by the position of the corresponding connections on the associated mounting flange of the painting robot.
  • the outer shaping air nozzle 26 is supplied in this case by a steering air line 30, which is guided on the outside of the compressed air turbine 23 between the housing 25 and the compressed air turbine 23 along.
  • the flange opening 28 first opens into an axially extending tap hole 31, which then merges into a radially extending tap hole 32, wherein the radially extending tap hole 32 finally opens on the outside of a valve housing 33 in a space between the housing 25 and the valve housing 33.
  • the shaping air is then guided past the compressed-air turbine 23 into a so-called air space 34, from where it finally arrives at the shaping air nozzle 26 through tap holes 35 in the shaping air ring 24.
  • the steering air duct 36 also passes axially through a bearing unit 37 of the compressed air turbine 23.
  • the radial distance of the shaping air duct 36 from the axis of rotation of the bell cup 22 is in this case greater than the outer diameter of the turbine wheel, not shown for simplicity, so that the shaping air duct 36 extends on the outside of the turbine wheel.
  • the Lenklufttechnisch 36 then opens bell cup side in a further air space 38 which is disposed between a substantially cylindrical portion 39 of the compressed air turbine 23 and a surrounding cover 40.
  • the bores 41 in the section 39 of the compressed air turbine 23 in this case consist of an outgoing from the lateral surface of the section 39 radially extending tap hole and emanating from the glockenteller documenten end face of the section 39 axially extending tap hole, which allows easy installation.
  • a pressure sensor 42 with an integrated radio transmitter opens into the steering air line 36, wherein the pressure sensor 42 measures the steering air pressure and emits a corresponding radio signal through the radio transmitter.
  • This radio signal is received by a receiver 43 via an antenna 44 and forwarded to an evaluation unit, wherein the evaluation unit is not shown for simplicity.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Coating Apparatus (AREA)
  • Spray Control Apparatus (AREA)

Description

Die Erfindung betrifft eine Beschichtungsanlage mit einer Sensoranordnung.The invention relates to a coating system with a sensor arrangement.

In modernen Lackieranlagen werden bekanntermaßen Rotationszerstäuber eingesetzt, bei denen ein sogenannter Glockenteller von einer Druckluftturbine mit hohen Drehzahlen angetrieben wird. Der Glockenteller ist hierbei in der Regel kegelstumpfförmig und erweitert sich in Sprührichtung, wobei das aufzutragende Beschichtungsmittel in dem kegelstumpfförmigen Glockenteller aufgrund der Zentrifugalkräfte axial und insbesondere radial beschleunigt wird, so dass an der Glockentellerabrisskante ein kegelförmiger Sprühstrahl entsteht.Rotary atomizers are known to be used in modern paint shops, in which a so-called bell plate is driven by a compressed air turbine at high speeds. The bell cup is in this case usually frusto-conical and expands in spray direction, wherein the coating agent to be applied is accelerated axially and in particular radially in the frusto-conical bell cup due to the centrifugal forces, so that a cone-shaped spray jet is produced at the bell plate tear-off.

Aus DE 43 06 800 A1 ist es weiterhin bekannt, die Drehzahl der Druckluftturbine zu messen. Hierzu sind an dem Turbinenrad der Druckluftturbine reflektierende Markierungen angebracht, die mit dem Turbinenrad rotieren und über Lichtwellenleiter von einem stationären optischen Sensor abgetastet werden. Zur Erreichung eines guten Lackierergebnisses liegt der Rotationszerstäuber mit der Druckluftturbine hierbei auf einem Hochspannungspotential, während die zu lackierenden Werkstücke und der optische Sensor elektrisch geerdet sind.Out DE 43 06 800 A1 it is also known to measure the speed of the compressed air turbine. For this purpose, reflective markings are mounted on the turbine wheel of the compressed air turbine, which rotate with the turbine wheel and scanned by optical fibers from a stationary optical sensor. To achieve a good Lackierergebnisses the rotary atomizer with the compressed air turbine is in this case at a high voltage potential, while the workpieces to be coated and the optical sensor are electrically grounded.

Die Verwendung von flexiblen Lichtwellenleitern zur Abtastung der optischen Markierungen an dem Turbinenrad ermöglicht eine stationäre Anordnung des optischen Sensor und eine Potentialtrennung des Sensors gegenüber dem Hochspannungspotential des Rotationszerstäubers.The use of flexible optical fibers to scan the optical marks on the turbine wheel allows a stationary arrangement of the optical sensor and a potential separation of the sensor against the high voltage potential of the rotary atomizer.

Nachteilig an dieser bekannten Sensoranordnung mit Lichtwellenleitern ist zum einen die Tatsache, dass zur Umsetzung des in den Lichtwellenleitern übertragenen Lichtsignals in ein elektrisches Signal relativ große optoelektrische Wandler.A disadvantage of this known sensor arrangement with optical waveguides on the one hand the fact that the implementation of the in the light waveguides transmitted light signal into an electrical signal relatively large opto-electrical converter.

Zum anderen ist bei einer Lichtwellenleiterverbindung nur eine relativ geringe Anzahl von Trennstellen möglich, da an jeder Trennstelle Übertragungsverluste auftreten. Bei zunehmender Bauteilmodularität von modernen Beschichtungsanlagen und entsprechend zunehmender Anzahl der Trennstellen stößt die bekannte Lichtleitertechnik somit an Grenzen.On the other hand, only a relatively small number of separation points is possible with an optical fiber connection, since transmission losses occur at each separation point. With increasing component modularity of modern coating systems and correspondingly increasing number of separation points, the known optical fiber technology thus reaches its limits.

Ferner sind Lichtwellenleiter relativ bruchempfindlich, was bei einer übermäßigen mechanischen Beanspruchung der Sensoranordnung zu einem Funktionsausfall der Drehzahlmessung führen kann.Furthermore, optical waveguides are relatively susceptible to fracture, which can lead to a malfunction of the rotational speed measurement in the event of excessive mechanical stress on the sensor arrangement.

Aus US 5 660 334 ist eine Beschichtungsanlage bekannt, die zur Beschichtung von Pflanzen mit Herbiziden oder Düngemitteln dient. Aus dieser Druckschrift ist jedoch weder ein Lackierungsroboter noch ein Rotationszerstäuber bekannt.Out US 5,660,334 For example, a coating system is known which serves to coat plants with herbicides or fertilizers. From this document, however, neither a painting robot nor a rotary atomizer is known.

Aus US 5 218 305 ist eine Handsprühpistole bekannt, die eine Strom- und Spannungsmessung ermöglicht und das entsprechende Messsignal drahtlos überträgt. Eine Druckmessung ist jedoch hieraus nicht bekannt.Out US 5 218 305 a hand spray gun is known, which allows a current and voltage measurement and transmits the corresponding measurement signal wirelessly. However, a pressure measurement is not known from this.

Schließlich offenbart WO01/91914 A1 eine Beschichtungsanlage mit einem Rotationszerstäuber, bei der ein Sensor in dem Rotationszerstäuber Betriebsgrößen des Rotationszerstäubers misst und an einen stationären Empfänger überträgt. Eine Druckmessung indem Rotationszerstäuber ist hieraus ebenfalls nicht bekannt.Finally revealed WO01 / 91914 A1 a coating plant with a rotary atomizer, in which a sensor in the rotary atomizer measures operating variables of the rotary atomizer and transmits them to a stationary receiver. A pressure measurement in the rotary atomizer is also not known from this.

Der Erfindung liegt somit die Aufgabe zugrunde, die vorstehend beschriebene bekannte Sensoranordnung dahingehend zu verbessern, dass eine größere Bauteilmodularität möglich ist, wobei die mechanische Belastbarkeit möglichst groß sein soll.The invention is therefore based on the object to improve the known sensor arrangement described above to the extent that a larger component modularity is possible, the mechanical load capacity should be as large as possible.

Die Aufgabe wird, ausgehend von der eingangs beschriebenen bekannten Sensoranordnung gemäß dem Oberbegriff des Anspruchs 1, durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The object is achieved on the basis of the above-described known sensor arrangement according to the preamble of claim 1 by the characterizing features of claim 1.

Die Erfindung umfasst die allgemeine technische Lehre, zur Übertragung des Sensorsignals einen Sender und einen Empfänger vorzusehen, wobei eine drahtlose Verbindung zwischen dem Sender und dem Empfänger besteht. Vorteilhaft an einer drahtlosen Verbindung zwischen dem Sender und dem Empfänger ist zum einen die unbegrenzte mechanische Belastbarkeit der Verbindung, wohingegen eine Verbindung durch Lichtwellenleiter relativ bruchempfindlich ist. Zum anderen ermöglicht eine drahtlose Verbindung zwischen dem Sender und dem Empfänger vorteilhaft eine beliebige Bauteilmodularität, da im Gegensatz zu Lichtwellenleitern keine Trennstellen an den Übergängen zwischen den einzelnen Modulen auftreten.The invention includes the general technical teaching to provide a transmitter and a receiver for transmitting the sensor signal, wherein there is a wireless connection between the transmitter and the receiver. An advantage of a wireless connection between the transmitter and the receiver, on the one hand, the unlimited mechanical strength of the connection, whereas a connection by optical fibers is relatively fragile. On the other hand, a wireless connection between the transmitter and the receiver advantageously allows any component modularity, since, in contrast to optical waveguides no separation points occur at the transitions between the individual modules.

Die erfindungsgemäße Verwendung einer drahtlosen Verbindung mit einem Sender und einem Empfänger ermöglicht vorteilhaft eine Anordnung des Sensors in einem beweglichen Bauteil einer Beschichtungsanlage, wohingegen der Sensor bei der eingangs beschriebenen bekannten Sensoranordnung stationär angeordnet und über Lichtwellenleiter mit dem beweglichen Rotationszerstäuber verbunden ist.The inventive use of a wireless connection with a transmitter and a receiver advantageously allows an arrangement of the sensor in a movable component of a coating system, whereas the sensor in the known sensor arrangement described above is arranged stationary and connected via optical fibers with the movable rotary atomizer.

Bei der erfindungsgemäßen Sensoranordnung ist der Sensor also an einem beweglichen Teil der Beschichtungsanlage angebracht, während der Empfänger stationär angeordnet ist. Die zwischen dem Sender und dem Empfänger somit auftretende Relativbewegung während des Betriebs der Beschichtungsanlage führt jedoch nicht zu einer mechanischen Belastung der Verbindung oder einem mechanischen Verschleiß, da die Verbindung zwischen dem Sender und dem Empfänger drahtlos ist.In the sensor arrangement according to the invention, the sensor is thus attached to a moving part of the coating system, while the receiver is arranged stationary. However, the relative movement thus occurring between the transmitter and the receiver during the operation of the coating system does not result in a mechanical load on the connection or a mechanical wear, since the connection between the transmitter and the receiver is wireless.

Vorzugsweise handelt es sich bei dem Sender um einen Funksender und bei dem Empfänger entsprechend um einen Funkempfänger, wobei zwischen dem Funksender und dem Funkempfänger eine drahtlose Funkverbindung besteht.Preferably, the transmitter is a radio transmitter and, at the receiver, is a radio receiver, wherein there is a wireless radio link between the radio transmitter and the radio receiver.

Es ist jedoch alternativ auch möglich, dass der Sender ein optischer Sender und der Empfänger ein optischer Empfänger ist, wobei zwischen dem optischen Sender und dem optischen Empfänger eine Sichtverbindung besteht. Beispielsweise kann zur Übertragung der Sensorsignale ein Infrarotsender eingesetzt werden, dessen Signal von einem Infrarotempfänger aufgenommen wird.Alternatively, however, it is also possible that the transmitter is an optical transmitter and the receiver is an optical receiver, wherein there is a line of sight connection between the optical transmitter and the optical receiver. For example, can be used to transmit the sensor signals, an infrared transmitter whose signal is picked up by an infrared receiver.

Ferner besteht die Möglichkeit, dass der Sender ein akustischer Sender und der Empfänger entsprechend ein akustischer Empfänger ist. Beispielsweise kann zur Übertragung der Sensorsignale ein Ultraschallsender eingesetzt werden, dessen Signal von einem Ultraschallempfänger erfasst wird.It is also possible that the transmitter is an acoustic transmitter and the receiver is an acoustic receiver. For example, an ultrasonic transmitter can be used for transmitting the sensor signals, the signal of which is detected by an ultrasonic receiver.

Darüber hinaus ermöglicht die drahtlose Verbindung zwischen dem Sender und dem Empfänger eine elektrische Potentialtrennung, so dass der Sender einerseits und der Empfänger andererseits auf unterschiedlichen elektrischen Potentialen liegen können. Dies ist insbesondere beim Einsatz in einer elektrostatischen Beschichtungsanlage mit einem Rotationszerstäuber vorteilhaft, da der Rotationszerstäuber hierbei üblicherweise auf Hochspannungspotential liegt, während die zu beschichtenden Werkstücke geerdet werden. Der Sender kann also bei der erfindungsgemäßen Sensoranordnung ebenfalls auf einem Hochspannungspotential liegen, während der Empfänger auf einem Niederspannungspotential oder auf einem Massepotential liegt.In addition, the wireless connection between the transmitter and the receiver allows electrical isolation, so that the transmitter on the one hand and the receiver on the other hand can be at different electrical potentials. This is particularly advantageous when used in an electrostatic coating system with a rotary atomizer, since the rotary atomizer is usually at high voltage potential while the workpieces to be coated are earthed. The transmitter can therefore also be at a high voltage potential in the sensor arrangement according to the invention, while the receiver is at a low-voltage potential or at a ground potential.

Bei dem Sensor handelt es sich um einen Drucksensor, der eine Druckgröße der Beschichtungsanlage misst, wie beispielsweise den Druck eines Mediums (Luft, Beschichtungsmittel, Lösungsmittel) der Beschichtungsanlage. Hierbei ist der Antriebsluftdruck, der Lenkluftdruck, der Lösungsmitteldruck, der Farbdruck oder der Leitungsdruck als zu messende Druckgröße zu nennen.The sensor is a pressure sensor which measures a print size of the coating installation, for example the pressure of a medium (air, coating agent, solvent) of the coating installation. Here, the drive air pressure, the Lenkluftdruck, the solvent pressure, the color print or the line pressure to be mentioned as the pressure to be measured.

Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet oder werden nachstehend zusammen mit der Beschreibung des bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher erläutert. Es zeigen:

  • Figur 1 einen Rotationszerstäuber mit einer erfindungsgemäßen Sensoranordnung zur Druckmessung.
Other advantageous developments of the invention are characterized in the subclaims or are explained in more detail below together with the description of the preferred embodiment of the invention with reference to FIGS. Show it:
  • FIG. 1 a rotary atomizer with a sensor arrangement according to the invention for pressure measurement.

Die in Figur 1 gezeigte Querschnittsansicht zeigt einen Rotationszerstäuber 19, der weitgehend herkömmlich aufgebaut ist, so dass zur Ergänzung der folgenden Beschreibung auf den einschlägigen Stand der Technik verwiesen wird.In the FIG. 1 The cross-sectional view shown is a rotary atomizer 19, which is constructed to a large extent conventional, so that reference is made to supplement the following description on the relevant prior art.

Zur Montage des Rotationszerstäubers 19 weist dieser an seiner montageseitigen Stirnfläche einen Befestigungsflansch 20 mit einem Befestigungszapfen 21 auf, der eine mechanische Befestigung an einem Roboterarm eines Lackierroboters ermöglicht.For mounting the rotary atomizer 19 has this on its mounting-side end face a mounting flange 20 with a mounting pin 21, which allows a mechanical attachment to a robot arm of a painting robot.

An den Rotationszerstäuber 19 kann ein herkömmlicher kegelstumpfförmiger Glockenteller 22 angebracht werden, der hier nur gestrichelt wiedergegeben ist und im Betrieb des Rotationszerstäubers 19 durch eine Druckluftturbine 23 mit einer hohen Drehzahl angetrieben wird. Die Drehung des Glockentellers 22 führt hierbei dazu, dass das in das Innere des Glockentellers 22 eingeführte Beschichtungsmittel axial und insbesondere radial beschleunigt wird und an einer Glockentellerabrisskante abgesprüht wird.At the rotary atomizer 19, a conventional frustoconical bell cup 22 may be attached, which is shown here only in dashed lines and is driven in operation of the rotary atomizer 19 by a compressed air turbine 23 at a high speed. The rotation of the bell cup 22 in this case means that the introduced into the interior of the bell cup 22 coating agent is axially and in particular radially accelerated and sprayed on a Glockentellerabrisskante.

Der Antrieb der Druckluftturbine 23 erfolgt hierbei durch Druckluft, die von dem Lackierroboter über den Befestigungsflansch 20 geführt wird, wobei die Zuführung der Antriebsluft hier zur Vereinfachung nicht dargestellt ist.The drive of the compressed air turbine 23 takes place here by compressed air, which is guided by the painting robot via the mounting flange 20, wherein the supply of the drive air is not shown here for simplicity.

Zur Formung des von dem Glockenteller 22 abgegebenen Sprühstrahls ist weiterhin ein sogenannter Lenkluftring 24 vorgesehen, der in der glockentellerseitigen Stirnfläche eines Gehäuses 25 des Rotationszerstäubers 19 angeordnet ist. In dem Lenkluftring 24 sind mehrere axial ausgerichtete Lenkluftdüsen 26, 27 angeordnet, über die im Betrieb des Rotationszerstäubers 19 ein Lenkluftstrom axial außen auf die kegelförmige Mantelfläche des Glockentellers 22 geblasen werden kann. In Abhängigkeit von der Menge und der Geschwindigkeit der aus den Lenkluftdüsen 26, 27 ausgeblasenen Lenkluft wird so der Sprühstrahl geformt und die gewünschte Strahlbreite eingestellt.To form the spray jet emitted by the bell cup 22, a so-called shaping air ring 24 is furthermore provided, which in the bell-plate-side end face of a housing 25 of the rotary atomizer 19 is arranged. In the shaping air ring 24 a plurality of axially directed shaping air nozzles 26, 27 are arranged, via which, during operation of the rotary atomizer 19, a directing air flow can be blown axially outwardly onto the conical circumferential surface of the bell cup 22. Depending on the amount and the speed of the shaping air blown out of the shaping air nozzles 26, 27, the spray jet is thus formed and the desired jet width is set.

Die Zuführung der Lenkluft für die beiden Lenkluftdüsen 26, 27 erfolgt hierbei durch jeweils eine Flanschöffnung 28, 29, die in dem Befestigungsflansch 20 des Rotationszerstäubers 19 angeordnet sind. Die Position der Flanschöffnungen 28, 29 innerhalb der Stirnfläche des Befestigungsflansches 20 ist hierbei durch die Position der entsprechenden Anschlüsse an dem zugehörigen Befestigungsflansch des Lackierroboters vorgegeben.The supply of the shaping air for the two shaping air nozzles 26, 27 takes place here by a respective flange opening 28, 29, which are arranged in the mounting flange 20 of the rotary atomizer 19. The position of the flange openings 28, 29 within the end face of the mounting flange 20 is predetermined by the position of the corresponding connections on the associated mounting flange of the painting robot.

Die außenliegende Lenkluftdüse 26 wird hierbei durch eine Lenkluftleitung 30 versorgt, die an der Außenseite der Druckluftturbine 23 zwischen dem Gehäuse 25 und der Druckluftturbine 23 entlang geführt ist. Hierzu mündet die Flanschöffnung 28 zunächst in eine axial verlaufende Stichbohrung 31, die dann in eine radial verlaufende Stichbohrung 32 übergeht, wobei die radial verlaufende Stichbohrung 32 schließlich an der Außenseite eines Ventilgehäuses 33 in einen Zwischenraum zwischen dem Gehäuse 25 und dem Ventilgehäuse 33 mündet. Die Lenkluft wird dann an der Druckluftturbine 23 vorbei in einen sogenannten Luftraum 34 geführt, von wo sie schließlich durch Stichbohrungen 35 in dem Lenkluftring 24 zu der Lenkluftdüse 26 gelangt.The outer shaping air nozzle 26 is supplied in this case by a steering air line 30, which is guided on the outside of the compressed air turbine 23 between the housing 25 and the compressed air turbine 23 along. For this purpose, the flange opening 28 first opens into an axially extending tap hole 31, which then merges into a radially extending tap hole 32, wherein the radially extending tap hole 32 finally opens on the outside of a valve housing 33 in a space between the housing 25 and the valve housing 33. The shaping air is then guided past the compressed-air turbine 23 into a so-called air space 34, from where it finally arrives at the shaping air nozzle 26 through tap holes 35 in the shaping air ring 24.

Die Zuführung der Lenkluft für die Lenkluftdüse 27 erfolgt dagegen durch eine Lenkluftleitung 36, die von der Flanschöffnung 29 in dem Befestigungsflansch 20 ausgehend axial und knickfrei durch das Ventilgehäuse 33 hindurchgeht. Darüber hinaus geht die Lenkluftleitung 36 auch axial durch eine Lagereinheit 37 der Druckluftturbine 23. Der radiale Abstand der Lenkluftleitung 36 von der Drehachse des Glockentellers 22 ist hierbei größer als der Außendurchmesser des zur Vereinfachung nicht dargestellten Turbinenrads, so dass die Lenkluftleitung 36 an der Außenseite des Turbinenrades verläuft. Die Lenkluftleitung 36 mündet dann glockentellerseitig in einen weiteren Luftraum 38, der zwischen einem im Wesentlichen zylindrischen Abschnitt 39 der Druckluftturbine 23 und einer diesen umgebenden Abdeckung 40 angeordnet ist.The supply of the shaping air for the shaping air nozzle 27, on the other hand, takes place by means of a shaping air line 36 which, starting from the flange opening 29 in the fastening flange 20, passes axially and without kinking through the valve housing 33. In addition, the steering air duct 36 also passes axially through a bearing unit 37 of the compressed air turbine 23. The radial distance of the shaping air duct 36 from the axis of rotation of the bell cup 22 is in this case greater than the outer diameter of the turbine wheel, not shown for simplicity, so that the shaping air duct 36 extends on the outside of the turbine wheel. The Lenkluftleitung 36 then opens bell cup side in a further air space 38 which is disposed between a substantially cylindrical portion 39 of the compressed air turbine 23 and a surrounding cover 40.

In der Mantelfläche des Abschnitts 39 befinden sich mehrere Bohrungen 41, die in der glockentellerseitigen Stirnfläche der Druckluftturbine 23 münden und schließlich die Lenkluftdüsen 27 versorgen. Die Bohrungen 41 in dem Abschnitt 39 der Druckluftturbine 23 bestehen hierbei aus einer von der Mantelfläche des Abschnitts 39 ausgehenden radial verlaufenden Stichbohrung und einer von der glockentellerseitigen Stirnfläche des Abschnitts 39 ausgehenden axial verlaufenden Stichbohrung, was eine einfache Montage ermöglicht.In the lateral surface of the portion 39 there are a plurality of bores 41, which open into the bell-plate-side end face of the compressed air turbine 23 and finally supply the shaping air nozzles 27. The bores 41 in the section 39 of the compressed air turbine 23 in this case consist of an outgoing from the lateral surface of the section 39 radially extending tap hole and emanating from the glockentellerseitigen end face of the section 39 axially extending tap hole, which allows easy installation.

In die Lenkluftleitung 36 mündet hierbei nahe dem Befestigungsflansch 20 ein Drucksensor 42 mit einem integrierten Funksender, wobei der Drucksensor 42 den Lenkluftdruck misst und durch den Funksender ein entsprechendes Funksignal abstrahlt.In this case, near the attachment flange 20, a pressure sensor 42 with an integrated radio transmitter opens into the steering air line 36, wherein the pressure sensor 42 measures the steering air pressure and emits a corresponding radio signal through the radio transmitter.

Dieses Funksignal wird von einem Empfänger 43 über eine Antenne 44 empfangen und an eine Auswertungseinheit weitergeleitet, wobei die Auswertungseinheit zur Vereinfachung nicht dargestellt ist.This radio signal is received by a receiver 43 via an antenna 44 and forwarded to an evaluation unit, wherein the evaluation unit is not shown for simplicity.

Die Erfindung ist nicht auf das vorstehend beschriebene bevorzugte Ausführungsbeispiele beschränkt. Vielmehr ist eine Vielzahl von Varianten und Abwandlungen denkbar, die ebenfalls von dem Erfindungsgedanken Gebrauch machen und deshalb in den Schutzbereich fallen.The invention is not limited to the preferred embodiments described above. Rather, a variety of variants and modifications are conceivable, which also make use of the idea of the invention and therefore fall within the scope.

Claims (6)

  1. Coating system comprising
    a) a painting robot,
    b) a rotary atomizer (19), moved by the painting robot, for coating workpieces, and
    c) a sensor arrangement comprising
    d) at least one sensor (42) for detecting at least one operating quantity of the coating system and for generating a corresponding sensor signal,
    e) a transmitter connected to the sensor (42) for transmitting the sensor signal, the transmitter and/or the sensor (42) being attached to a movable part of the coating system,
    f) a stationary receiver (43) for receiving the sensor signal transmitted by the transmitter, and
    g) a wireless connection between the transmitter and the receiver (43),
    h) the receiver (43) being on a low voltage potential or on ground potential,
    characterized in
    i) that the sensor (42) is a pressure sensor measuring the pressure of a medium of the coating system,
    j) and that the transmitter and/or the sensor (42) is on a high voltage potential.
  2. Coating system according to claim 1, characterized in that
    the transmitter is a radio transmitter and the receiver (43) is a radio receiver.
  3. Coating system according to claim 1, characterized in that
    the transmitter is an optical transmitter and the receiver is an optical receiver.
  4. Coating system according to claim 3, characterized in that
    the transmitter is an infrared transmitter and the receiver is an infrared receiver.
  5. Coating system according to claim 1, characterized in that the transmitter is an acoustic transmitter and the receiver is an acoustic receiver.
  6. Coating system according to any one of the preceding claims, characterized in that the sensor (42) detects the shaping air pressure in a shaping air line (36) of the rotary atomizer.
EP03019861A 2002-09-02 2003-09-01 Sensor device for a painting installation Expired - Lifetime EP1394757B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10240451A DE10240451A1 (en) 2002-09-02 2002-09-02 Sensor arrangement for a coating system
DE10240451 2002-09-02

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EP1394757A2 EP1394757A2 (en) 2004-03-03
EP1394757A3 EP1394757A3 (en) 2005-04-13
EP1394757B1 true EP1394757B1 (en) 2013-01-09

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US (2) US20050098102A1 (en)
EP (1) EP1394757B1 (en)
DE (1) DE10240451A1 (en)
ES (1) ES2402658T3 (en)

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Also Published As

Publication number Publication date
EP1394757A2 (en) 2004-03-03
DE10240451A1 (en) 2004-03-11
US20050098102A1 (en) 2005-05-12
US20070145250A1 (en) 2007-06-28
ES2402658T3 (en) 2013-05-07
EP1394757A3 (en) 2005-04-13
US7432495B2 (en) 2008-10-07

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