EP0604733B1 - Application unit for sealant - Google Patents

Application unit for sealant Download PDF

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Publication number
EP0604733B1
EP0604733B1 EP93117814A EP93117814A EP0604733B1 EP 0604733 B1 EP0604733 B1 EP 0604733B1 EP 93117814 A EP93117814 A EP 93117814A EP 93117814 A EP93117814 A EP 93117814A EP 0604733 B1 EP0604733 B1 EP 0604733B1
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EP
European Patent Office
Prior art keywords
carriage
unit according
support
applicator unit
applicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93117814A
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German (de)
French (fr)
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EP0604733A1 (en
Inventor
David N. Belge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Operations GmbH
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Airbus Operations GmbH
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Publication date
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Publication of EP0604733A1 publication Critical patent/EP0604733A1/en
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Publication of EP0604733B1 publication Critical patent/EP0604733B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines

Definitions

  • the invention relates to an application unit for a sealing compound for the automatic sealing of riveted joints.
  • an automatic riveting machine consisting essentially of a drilling feed unit, a rivet feed unit and a riveting unit, each of which is designed to be controllable, the units being movably supported on a holding bracket in guides pointing in a radial direction toward the riveting point and the holding bracket has pneumatic couplings, electrical plugs and a clamping device for coupling the riveting machine to a production robot.
  • This can be used, for example, to produce riveted connections on an aircraft structure component using an appropriate program.
  • the rivet holes are drilled, and the rivets are inserted and squeezed in an automatic production process.
  • a sealant dispenser which can be used with an automatic riveter, which has means for drilling the rivet holes and for setting the rivet and which comprises a control system whereby the functions of the means are coordinated.
  • Devices are also provided in order to move the dispensing device towards or away from a rivet hole after a certain amount of the sealing compound has been dispensed. These devices are supplied with energy by compressed air, which is used both for moving the dispensing device and for transporting the sealing compound.
  • the sealing compound is located in a container which, on the one hand, is connected to a compressed air source and, on the other hand, to an output head for the sealing compound via corresponding hose lines.
  • the dispensing head includes, inter alia, a check valve, a dispensing valve and a piston / cylinder arrangement which come into contact with the sealing compound during operation.
  • the invention has for its object to provide an application unit for a sealant for arrangement on the bracket of an automatic riveting machine so that it has no moving parts that come into contact with the sealant during operation.
  • the amount of sealant to be dispensed is precisely adjustable. Since only the compressed air supply to the application unit is switched by means of the ventilation valve, the previously required cleaning of moving parts and hoses that come into contact with sealing compound during operation is eliminated.
  • FIG. 1 shows an overview of an application unit 1, which is mounted on a holding bracket 2 of the automatic riveting machine.
  • the entire holding bracket 2 can be moved in the x ', y' and z 'direction by means of a production robot.
  • the application unit 1 is shown in the rest position and essentially comprises a guide 3, a slide 4 which can be displaced in the x direction on the guide 3, a carrier 5 guided in a transverse guide 7 for the application head 6 and a cartridge 8 which is connected to a compressed air line 9 and a dispensing nozzle 10 communicates.
  • the embodiment according to the invention shown has a vent valve 28 which is switched on in the compressed air supply of the application head 6.
  • a pneumatic cylinder is integrated in the guide 3, as a result of which the carriage 4 can be moved from its rest position shown in the image to the left by a predetermined distance into the delivery position and vice versa.
  • the transverse guide 7 is arranged perpendicular to the slide 4 and enables the carrier 5 to be displaced in the y direction by means of a further pneumatic cylinder 11.
  • the carrier 5 is thus opposite the Holding bracket 2 can be moved in the x and y direction.
  • Both cylinders, the one integrated in the guide 3 and the pneumatic cylinder 11, are effective in both directions.
  • two conventional non-contact limit switches are arranged, which detect the relative movement of the carrier 5 with respect to the transverse guide 7 and emit a corresponding signal when the predetermined positions of the carrier 5 are reached.
  • FIGS. 4 and 5 show details of the guides 3 and 7 described above.
  • the carriage 4 forms the first leg of an angular holder 13, the second leg of which, in the image, is directed vertically upwards and carries the transverse guide 7.
  • the transverse guide 7 consists essentially of a guide rail 14 of U-shaped cross section, in which a prism 15, which is firmly connected to the carrier 5, is guided perpendicular to the longitudinal extension of the guide 3.
  • the pneumatic cylinder 11 is firmly connected to the slide 4.
  • the relevant piston rod 12 acts on a boom 16, which in turn is firmly connected to the carrier 5. Two compressed air connections 17 and 18 are used to supply compressed air. In the rest position of the carrier 5 shown, the piston rod 12 is in its upper position.
  • the guide 3 is formed by a so-called rodless pneumatic cylinder, as is known for example under the name Martonair LINTRA.
  • the fixed part of the guide 3 is firmly connected to the holding bracket 2.
  • the pneumatically generated movement of the internal piston is removed at a power bridge 3a, with which the carriage 4 is firmly connected.
  • the internal cylinder is supplied with compressed air via corresponding compressed air connections 19 and 20.
  • a conceivable embodiment of the application unit is that corresponding electric motors are provided for actuating the slide 4 and the carrier 5.
  • a receiving sleeve 23 is arranged axially displaceably within the housing 21, a compression spring 24 being provided, which counteracts a shifting of the receiving sleeve 23 upwards in the figure.
  • the lowest position of the receiving sleeve 23 results from the fact that a nut 25 screwed onto the upper end of the receiving sleeve 23 bears against the housing 21. In this position, the spring 24 is under a prestress.
  • a clamping sleeve 27 provided with an external thread 26 is screwed into the lower end of the housing 21 and contains a previously inserted cartridge 8.
  • the dispensing nozzle 10 is screwed into the cartridge 8 from below and secured by a union nut 29 screwed onto the clamping sleeve 27.
  • the dispensing nozzle 10 has a centering mandrel 30 at its lower end, which merges into a shoulder 31. From the shoulder 31, there are six bores arranged at the same angular pitch, which open into the interior 32 of the dispensing nozzle 10.
  • a compressed air connection 34 is screwed into the upper end of the receiving sleeve 23 and communicates with the entire interior of the receiving sleeve 23.
  • the housing 21 has a radial bore with an internal thread into which one Stud screw 35 is screwed in.
  • a longitudinal groove is arranged, into which the stud 35 engages with its inner end. This prevents the receiving sleeve 23 from rotating relative to the housing 21.
  • the robot automatically moves the automatic riveting machine up to a precisely predetermined distance to the riveting point. From here, the individual operating units such as the drilling unit, the application unit, etc. are then moved to the riveting point and the corresponding operations are carried out. If an already installed rivet hole is to be prepared by using the sealing compound to place a rivet, the holding bracket is already in the working position, whereas the application unit 1 is still in the rest position according to FIG. 1. Then the application head 6 is moved by means of the guide 3 exactly through the rivet hole for the predetermined distance. The application head 6 then carries out a delivery movement on the basis of a corresponding signal.
  • the dispensing nozzle 10 is first moved toward the component by means of the transverse guide 7 until the shoulder 31 has approached the edge of the rivet bore up to a predetermined, defined air gap. Then the application head 6 returns to its rest position without staying in the dispensing position.
  • the centering mandrel 30 is immersed in the rivet bore and thus aligns the application head 6 precisely with the rivet bore. If it should happen due to a defect that the centering pin 30 touches the edge of a hole, damage to the component due to the spring 24 is avoided, which then acts as a force limiter.
  • the dosing of the sealing compound takes place by supplying compressed air via the compressed air connection 34 and takes place in good time before the application head 6 reaches its dispensing position.
  • the compressed air introduced acts on the sealing compound in the cartridge 8 and presses it out through the bores 33, so that six balls consisting of sealing compound appear on the shoulder 31.
  • the amount dispensed i.e. the size of the balls, can be set precisely via the amount and duration of the pressure.
  • the sealing compound present in the balls is brought into contact with the edge of the rivet hole and distributed on account of the shoulder 31.
  • the gap between the shoulder 31 and the component takes up the sealing compound and causes it not to be squeezed outwards.
  • the timely execution of the dosing process is very important as it takes a certain amount of time. In order to ensure that the dosing process is completed before the delivery position is reached, this can possibly already be started while the relevant rivet hole is still being drilled.
  • the decisive parameters can be determined experimentally and taken into account in the control program of the riveting machine. After the sealant has been applied as described above, the rivet in question can be inserted into the rivet hole. used and squeezed.
  • the application unit can also be used to apply other materials, for example an adhesive.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Automatic Assembly (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

Die Erfindung bezieht sich auf eine Anwendungseinheit für eine Dichtmasse zum automatischen Abdichten von Nietverbindungen.The invention relates to an application unit for a sealing compound for the automatic sealing of riveted joints.

Aus der DE-PS 32 32 093 ist eine automatische Nietmaschine bekannt, im wesentlichen bestehend aus einer Bohrvorschubeinheit, einer Nietzuführungseinheit und einer Vernietungseinheit, die jeweils steuerbar ausgeführt sind, wobei die besagten Einheiten an einer Haltekonsole in strahlenförmig zur Nietstelle hinweisenden Führungen verfahrbar gelagert sind und die Haltekonsole Pneumatikkupplungen, elektrische Stecker, sowie eine Spannvorrichtung zum Ankoppeln der Nietmaschine an einen Fertigungsroboter aufweist. Hiermit können beispielsweise Nietverbindungen an einem Flugzeugstruktur-Bauteil anhand eines entsprechenden Programms hergestellt werden. Dabei erfolgt das Bohren der Nietlöcher sowie das Einsetzen und Quetschen der Niete in einem automatischen Fertigungsablauf. Um den Korrosionsschutz der auf diese Weise hergestellten Nietverbindungen zu verbessern, ist es nun notwendig, die jeweils zwischen dem Nietkopf und dem Bauteil bestehende Fuge während des Nietprozesses automatisch mittels einer Dichtmasse abzudichten, was mit der vorgenannten Nietmaschine nicht möglich ist.From DE-PS 32 32 093 an automatic riveting machine is known, consisting essentially of a drilling feed unit, a rivet feed unit and a riveting unit, each of which is designed to be controllable, the units being movably supported on a holding bracket in guides pointing in a radial direction toward the riveting point and the holding bracket has pneumatic couplings, electrical plugs and a clamping device for coupling the riveting machine to a production robot. This can be used, for example, to produce riveted connections on an aircraft structure component using an appropriate program. The rivet holes are drilled, and the rivets are inserted and squeezed in an automatic production process. In order to improve the corrosion protection of the rivet connections produced in this way, it is now necessary to use the joint between the rivet head and the component to seal automatically during the riveting process by means of a sealing compound, which is not possible with the aforementioned riveting machine.

Durch die US-A-3 350 774 ist eine Ausgabevorrichtung für eine Dichtmasse bekannt, die verwendbar ist mit einer automatischen Nietmaschine, die Einrichtungen zum Bohren der Nietlöcher und zum Setzender Niete aufweist und ein Steuersystem umfaßt, wodurch die Funktionen der Einrichtungen koordiniert werden. Dabei sind weiterhin Einrichtungen vorgesehen, um die Ausgabevorrichtung zu einer Nietbohrung hin oder von dieser wieder wegzubewegen, nachdem eine bestimmte Menge der Dichtmasse ausgegeben wurde. Die Energieversorgung dieser Einrichtungen geschieht durch Druckluft, die sowohl zum Bewegen der Ausgabevorrichtung als auch zum Transport der Dichtmasse verwendet wird. Die Dichtmasse befindet sich in einem Behälter, der über entsprechende Schlauchleitungen einerseits mit einer Druckluftquelle und andererseits mit einem Ausgabekopf für die Dichtmasse in Verbindung steht. Der Ausgabekopf umfaßt unter anderem ein Rückschlagventil, ein Ausgabeventil und eine Kolben/Zylinder-Anordnung, die im Betrieb mit der Dichtmasse in Berührung kommen. Bei dieser Lösung ist es erforderlich, daß der Ausgabekopf und die darin enthaltenen beweglichen Teile nach jeder Benutzung gereinigt werden. Ebenso ist der Schlauch, der zur Zuführung der Dichtmasse zum Ausgabekopf dient, nach jedem Gebrauch zu reinigen oder zu erneuern.From US-A-3 350 774 there is known a sealant dispenser which can be used with an automatic riveter, which has means for drilling the rivet holes and for setting the rivet and which comprises a control system whereby the functions of the means are coordinated. Devices are also provided in order to move the dispensing device towards or away from a rivet hole after a certain amount of the sealing compound has been dispensed. These devices are supplied with energy by compressed air, which is used both for moving the dispensing device and for transporting the sealing compound. The sealing compound is located in a container which, on the one hand, is connected to a compressed air source and, on the other hand, to an output head for the sealing compound via corresponding hose lines. The dispensing head includes, inter alia, a check valve, a dispensing valve and a piston / cylinder arrangement which come into contact with the sealing compound during operation. With this solution, the dispensing head and the moving parts contained therein must be cleaned after each use. Likewise, the hose that is used to feed the sealant to the dispensing head must be cleaned or replaced after each use.

Demgemäß liegt der Erfindung die Aufgabe zugrunde, eine Anwendungseinheit für eine Dichtmasse zur Anordnung auf der Haltekonsole einer automatischen Nietmaschine, so auszubilden, daß diese keine beweglichen Teile aufweist, die im Betrieb mit der Dichtmasse in Berührung kommen.Accordingly, the invention has for its object to provide an application unit for a sealant for arrangement on the bracket of an automatic riveting machine so that it has no moving parts that come into contact with the sealant during operation.

Diese Aufgabe wird bei einer Anwendungseinheit der vorgenannten Art durch die Merkmale des Anspruchs 1 gelöst.This object is achieved in an application unit of the aforementioned type by the features of claim 1.

Dabei ist insbesondere von Vorteil, daß die abzugebende Menge der Dichtmasse genau einstellbar ist. Da mittels des Entlüftungsventils lediglich die Druckluftzufuhr zur Anwendungseinheit geschaltet wird, entfällt die bisher erforderliche Reinigung beweglicher Teile und Schläuche, die während des Betriebes mit Dichtmasse in Berührung kommen.It is particularly advantageous that the amount of sealant to be dispensed is precisely adjustable. Since only the compressed air supply to the application unit is switched by means of the ventilation valve, the previously required cleaning of moving parts and hoses that come into contact with sealing compound during operation is eliminated.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.

Die Erfindung ist anhand der Zeichnung dargestellt und nachfolgend näher erläutert. Es zeigen

Fig. 1
eine Übersicht über eine Anwendungseinheit,
Fig. 2
die Ansicht II nach Fig. 1,
Fig. 3
die Ansicht III nach Fig. 1,
Fig. 4
vergrößerte Einzelheiten nach Fig. 1,
Fig. 5
vergrößerte Einzelheiten nach Fig. 2 und
Fig. 6
Einzelheiten des Anwendungskopfes.
The invention is illustrated by the drawing and explained in more detail below. Show it
Fig. 1
an overview of an application unit,
Fig. 2
the view II of FIG. 1,
Fig. 3
the view III of FIG. 1,
Fig. 4
1,
Fig. 5
enlarged details of Fig. 2 and
Fig. 6
Details of the application head.

Figur 1 zeigt eine Übersicht über eine Anwendungseinheit 1, die auf einer Haltekonsole 2 der automatischen Nietmaschine montiert ist. Dabei ist die gesamte Haltekonsole 2 mittels eines Fertigungsroboters in x'-,y'- und z'-Richtung verfahrbar. Die Anwendungseinheit 1 ist in Ruheposition gezeigt und umfaßt im wesentlichen eine Führung 3, einen auf der Führung 3 in x-Richtung verschiebbaren Schlitten 4, einen in einer Querführung 7 geführten Träger 5 für den Anwendungskopf 6 und eine Kartusche 8, der mit einer Druckluftleitung 9 und einer Ausgabedüse 10 in Verbindung steht. Die gezeigte erfindungsgemäße Ausführung weist ein Entlüftungsventil 28 auf, das in die Druckluftversorgung des Anwendungskopfes 6 eingeschaltet ist. In die Führung 3 ist ein Pneumatikzylinder integriert, wodurch der Schlitten 4 aus seiner gezeigten Ruheposition im Bild nach links um eine vorbestimmte Strecke in die Ausgabeposition verfahrbar ist und umgekehrt. Die Querführung 7 ist gegenüber dem Schlitten 4 senkrecht angeordnet und ermöglicht anhand eines weiteren Pneumatikzylinders 11 eine Verschiebung des Trägers 5 in y-Richtung. Damit ist der Träger 5 gegenüber der Haltekonsole 2 in x- und y-Richtung verfahrbar. Beide Zylinder, der in die Führung 3 integrierte und der Pneumatikzylinder 11, sind in beiden Richtungen wirksam. Zur Steuerung des Zylinders 11 sind zwei übliche berührungslose Endschalter angeordnet, die die Relativbewegung des Trägers 5 gegenüber der Querführung 7 erfassen und bei Erreichen der vorbestimmten Positionen des Trägers 5 ein entsprechendes Signal abgeben.Figure 1 shows an overview of an application unit 1, which is mounted on a holding bracket 2 of the automatic riveting machine. The entire holding bracket 2 can be moved in the x ', y' and z 'direction by means of a production robot. The application unit 1 is shown in the rest position and essentially comprises a guide 3, a slide 4 which can be displaced in the x direction on the guide 3, a carrier 5 guided in a transverse guide 7 for the application head 6 and a cartridge 8 which is connected to a compressed air line 9 and a dispensing nozzle 10 communicates. The embodiment according to the invention shown has a vent valve 28 which is switched on in the compressed air supply of the application head 6. A pneumatic cylinder is integrated in the guide 3, as a result of which the carriage 4 can be moved from its rest position shown in the image to the left by a predetermined distance into the delivery position and vice versa. The transverse guide 7 is arranged perpendicular to the slide 4 and enables the carrier 5 to be displaced in the y direction by means of a further pneumatic cylinder 11. The carrier 5 is thus opposite the Holding bracket 2 can be moved in the x and y direction. Both cylinders, the one integrated in the guide 3 and the pneumatic cylinder 11, are effective in both directions. To control the cylinder 11, two conventional non-contact limit switches are arranged, which detect the relative movement of the carrier 5 with respect to the transverse guide 7 and emit a corresponding signal when the predetermined positions of the carrier 5 are reached.

Die Figuren 4 und 5 zeigen Einzelheiten der vorbeschriebenen Führungen 3 und 7. Der Schlitten 4 bildet den ersten Schenkel eines winkelförmigen Halters 13, dessen zweiter im Bild senkrecht nach oben gerichteter Schenkel die Querführung 7 trägt. Die Querführung 7 besteht im wesentlichen aus einer Führungsschiene 14 von U-förmigem Querschnitt, in der ein mit dem Träger 5 fest verbundenes Prisma 15 senkrecht zur Längserstreckung der Führung 3 geführt ist. Der Pneumatikzylinder 11 ist fest mit dem Schlitten 4 verbunden. Die betreffende Kolbenstange 12 wirkt auf einen Ausleger 16, der seinerseits fest mit dem Träger 5 verbunden ist. Zur Versorgung mit Druckluft dienen zwei Druckluftanschlüsse 17 und 18. In der gezeigten Ruhelage des Trägers 5 befindet sich die Kolbenstange 12 in ihrer oberen Position. Die Führung 3 wird durch einen sog. kolbenstangenlosen Pneumatikzylinder gebildet, wie er beispielsweise unter der Bezeichnung Martonair LINTRA, bekannt ist. Der feststehende Teil der Führung 3 ist fest mit der Haltekonsole 2 verbunden. Die pneumatisch erzeugbare Bewegung des internen Kolbens wird an einer Kraftbrücke 3a abgenommen, womit der Schlitten 4 fest verbunden ist. Die Versorgung des internen Zylinders mit Druckluft erfolgt über entsprechende Druckluftanschlüsse 19 und 20.FIGS. 4 and 5 show details of the guides 3 and 7 described above. The carriage 4 forms the first leg of an angular holder 13, the second leg of which, in the image, is directed vertically upwards and carries the transverse guide 7. The transverse guide 7 consists essentially of a guide rail 14 of U-shaped cross section, in which a prism 15, which is firmly connected to the carrier 5, is guided perpendicular to the longitudinal extension of the guide 3. The pneumatic cylinder 11 is firmly connected to the slide 4. The relevant piston rod 12 acts on a boom 16, which in turn is firmly connected to the carrier 5. Two compressed air connections 17 and 18 are used to supply compressed air. In the rest position of the carrier 5 shown, the piston rod 12 is in its upper position. The guide 3 is formed by a so-called rodless pneumatic cylinder, as is known for example under the name Martonair LINTRA. The fixed part of the guide 3 is firmly connected to the holding bracket 2. The pneumatically generated movement of the internal piston is removed at a power bridge 3a, with which the carriage 4 is firmly connected. The internal cylinder is supplied with compressed air via corresponding compressed air connections 19 and 20.

Eine denkbare Ausgestaltung der Anwendungseinheit besteht darin, daß zur Betätigung des Schlittens 4 und des Trägers 5 entsprechende Elektromotoren vorgesehen sind.A conceivable embodiment of the application unit is that corresponding electric motors are provided for actuating the slide 4 and the carrier 5.

Eine andere denkbare Ausgestaltung der Anwendungseinheit besteht darin, daß zur Betätigung des Schlittens 4 und des Trägers 5 entsprechende Hydraulikmotoren vorgesehen sind.Another conceivable embodiment of the application unit is that corresponding hydraulic motors are provided for actuating the carriage 4 and the carrier 5.

Fig. 6 zeigt den Anwendungskopf 6, dessen Gehäuse 21 mittels Schrauben 22 mit dem Träger 5 verbunden ist. Hierdurch ist der Anwendungskopf 6 rasch austauschbar. Innerhalb des Gehäuses 21 ist eine Aufnahmehülse 23 axial verschiebbar angeordnet, wobei eine Druckfeder 24 vorgesehen ist, die einer Verschiebung der Aufnahmehülse 23 im Bild nach oben entgegenwirkt. Die tiefste Stellung der Aufnahmehülse 23 ergibt sich dadurch, daß eine auf das obere Ende der Aufnahmehülse 23 aufgeschraubte Mutter 25 am Gehäuse 21 anliegt. In dieser Position steht die Feder 24 unter einer Vorspannung. In das untere Ende des Gehäuses 21 ist eine mit einem Außengewinde 26 versehene Klemmhülse 27 eingeschraubt, in der sich eine zuvor eingesetzte Kartusche 8 befindet. Durch Festziehen der Klemmhülse 27 wird der Flansch 28a der Kartusche 8 zwischen der Klemmhülse 27 und dem Gehäuse eingeklemmt. Die Ausgabedüse 10 ist von unten in die Kartusche 8 eingeschraubt und durch eine auf die Klemmhülse 27 aufgeschraubte Überwurfmutter 29 gesichert. Die Ausgabedüse 10 weist an ihrem unteren Ende einen Zentrierdorn 30 auf, der in eine Schulter 31 übergeht. Von der Schulter 31 gehen sechs in gleicher Winkelteilung angeordnete Bohrungen aus, die in den Innenraum 32 der Ausgabedüse 10 einmünden. In das obere Ende der Aufnahmehülse 23 ist ein Druckluftanschluß 34 eingeschraubt, der mit dem gesamten Innenraum der Aufnahmehülse 23 in Verbindung steht. An geeigneter Stelle weist das Gehäuse 21 eine radiale Bohrung mit einem Innengewinde auf, in das eine Stiftschraube 35 eingeschraubt ist. An entsprechender Stelle der Aufnahmehülse 23 ist eine Längsnut angeordnet, in die die Stiftschraube 35 mit ihrem inneren Ende eingreift. Hierdurch wird ein Verdrehen der Aufnahmehülse 23 gegenüber dem Gehäuse 21 verhindert.6 shows the application head 6, the housing 21 of which is connected to the carrier 5 by means of screws 22. As a result, the application head 6 can be exchanged quickly. A receiving sleeve 23 is arranged axially displaceably within the housing 21, a compression spring 24 being provided, which counteracts a shifting of the receiving sleeve 23 upwards in the figure. The lowest position of the receiving sleeve 23 results from the fact that a nut 25 screwed onto the upper end of the receiving sleeve 23 bears against the housing 21. In this position, the spring 24 is under a prestress. A clamping sleeve 27 provided with an external thread 26 is screwed into the lower end of the housing 21 and contains a previously inserted cartridge 8. By tightening the clamping sleeve 27, the flange 28a of the cartridge 8 is clamped between the clamping sleeve 27 and the housing. The dispensing nozzle 10 is screwed into the cartridge 8 from below and secured by a union nut 29 screwed onto the clamping sleeve 27. The dispensing nozzle 10 has a centering mandrel 30 at its lower end, which merges into a shoulder 31. From the shoulder 31, there are six bores arranged at the same angular pitch, which open into the interior 32 of the dispensing nozzle 10. A compressed air connection 34 is screwed into the upper end of the receiving sleeve 23 and communicates with the entire interior of the receiving sleeve 23. At a suitable point, the housing 21 has a radial bore with an internal thread into which one Stud screw 35 is screwed in. At the corresponding point of the receiving sleeve 23, a longitudinal groove is arranged, into which the stud 35 engages with its inner end. This prevents the receiving sleeve 23 from rotating relative to the housing 21.

Die automatische Nietmaschine wird zunächst durch den Roboter bis auf eine genau vorbestimmte Strecke an die Nietstelle herangefahren. Von hier aus werden dann die einzelnen Operationseinheiten wie die Bohreinheit, die Anwendungseinheit u.s.w. zur Nietstelle hingefahren und die entsprechenden Arbeitsgänge ausgeführt. Wenn nun eine bereits angebrachte Nietbohrung durch Anwendung der Dichtmasse zum Setzen eines Niets vorbereitet werden soll, befindet sich die Haltekonsole bereits in Arbeitsposition, wohingegen sich die Anwendungseinheit 1 noch in Ruheposition gemäß Fig. 1 befindet. Dann wird der Anwendungskopf 6 mittels der Führung 3 um die besagte vorbestimmte Strecke genau über die Nietbohrung gefahren. Daran anschließend führt der Anwendungskopf 6 aufgrund eines entsprechenden Signals eine Abgabebewegung durch. Hierbei wird die Ausgabedüse 10 mittels der Querführung 7 zunächst zum Bauteil hin bewegt, bis sich die Schulter 31 dem Rand der Nietbohrung bis auf einen vorbestimmten definierten Luftspalt genähert hat. Daran anschließend kehrt der Anwendungskopf 6 wieder in seine Ruheposition zurück ohne in der Ausgabeposition zu verweilen. Dabei taucht der Zentrierdorn 30 in die Nietbohrung ein und richtet so den Anwendungskopf 6 genau auf die Nietbohrung aus. Falls es aufgrund eines Defektes vorkommen sollte, daß der Zentrierdorn 30 auf dem Rand einer Bohrung aufsetzt, so wird eine Beschädigung des Bauteils infolge der Feder 24 vermieden, die dann als Kraftbegrenzer wirkt. Die Dosierung der Dichtmasse geschieht durch Druckluftzufuhr über den Druckluftanschluß 34 und findet rechtzeitig statt, bevor der Anwendungskopf 6 seine Ausgabeposition erreicht. Die eingeleitete Druckluft wirkt auf die in der Kartusche 8 befindliche Dichtmasse und preßt diese durch die Bohrungen 33 aus, so daß auf der Schulter 31 sechs aus Dichtmasse bestehende Kugeln erscheinen. Die Ausgabemenge, das heißt die Größe der Kugeln, kann über Höhe und Wirkdauer des Druckes genau eingestellt werden. Um ein unbeabsichtigtes Nachfließen von Dichtmasse zu verhindern, ist es wichtig, daß der Luftraum oberhalb der Dichtmasse am Ende des Dosiervorganges sofort drucklos gemacht wird. Dies wird dadurch erreicht, daß das betreffende Magnetventil beim Abschalten des Drucks einen Entlüftungskanal freigibt. Entsprechend zeigt Fig. 1 ein Entlüftungsventil 28.The robot automatically moves the automatic riveting machine up to a precisely predetermined distance to the riveting point. From here, the individual operating units such as the drilling unit, the application unit, etc. are then moved to the riveting point and the corresponding operations are carried out. If an already installed rivet hole is to be prepared by using the sealing compound to place a rivet, the holding bracket is already in the working position, whereas the application unit 1 is still in the rest position according to FIG. 1. Then the application head 6 is moved by means of the guide 3 exactly through the rivet hole for the predetermined distance. The application head 6 then carries out a delivery movement on the basis of a corresponding signal. Here, the dispensing nozzle 10 is first moved toward the component by means of the transverse guide 7 until the shoulder 31 has approached the edge of the rivet bore up to a predetermined, defined air gap. Then the application head 6 returns to its rest position without staying in the dispensing position. The centering mandrel 30 is immersed in the rivet bore and thus aligns the application head 6 precisely with the rivet bore. If it should happen due to a defect that the centering pin 30 touches the edge of a hole, damage to the component due to the spring 24 is avoided, which then acts as a force limiter. The dosing of the sealing compound takes place by supplying compressed air via the compressed air connection 34 and takes place in good time before the application head 6 reaches its dispensing position. The The compressed air introduced acts on the sealing compound in the cartridge 8 and presses it out through the bores 33, so that six balls consisting of sealing compound appear on the shoulder 31. The amount dispensed, i.e. the size of the balls, can be set precisely via the amount and duration of the pressure. In order to prevent the sealing compound from flowing in unintentionally, it is important that the air space above the sealing compound is immediately depressurized at the end of the metering process. This is achieved in that the solenoid valve in question releases a ventilation channel when the pressure is switched off. 1 shows a vent valve 28.

Im Augenblick der Abgabe der Dichtmasse wird die in den Kugeln vorliegende Dichtmasse mit dem Rand der Nietbohrung in Kontakt gebracht und aufgrund der Schulter 31 verteilt. Der zwischen der Schulter 31 und dem Bauteil bestehende Spalt nimmt dabei die Dichtmasse auf und bewirkt, daß diese nicht nach außen weggequetscht wird. Die rechtzeitige Durchführung des Dosiervorganges ist sehr wichtig, da dieser eine bestimmte Zeit in Anspruch nimmt. Um sicherzustellen, daß der Dosiervorgang vor Erreichen der Abgabeposition abgeschlossen ist, kann dieser gegebenenfalls bereits gestartet werden, während das betreffende Nietloch noch gebohrt wird. Die hierbei entscheidenden Parameter können experimentell ermittelt und im Steuerprogramm der Nietmaschine berücksichtigt werden. Nachdem die Dichtmasse wie vorbeschrieben aufgetragen ist, kann der betreffende Niet in die Nietbohrung. eingesetzt und gequetscht werden. Die Anwendungseinheit kann auch zum Auftragen anderer Massen, beispielsweise eines Klebstoffs, verwendet werden.At the moment the sealing compound is dispensed, the sealing compound present in the balls is brought into contact with the edge of the rivet hole and distributed on account of the shoulder 31. The gap between the shoulder 31 and the component takes up the sealing compound and causes it not to be squeezed outwards. The timely execution of the dosing process is very important as it takes a certain amount of time. In order to ensure that the dosing process is completed before the delivery position is reached, this can possibly already be started while the relevant rivet hole is still being drilled. The decisive parameters can be determined experimentally and taken into account in the control program of the riveting machine. After the sealant has been applied as described above, the rivet in question can be inserted into the rivet hole. used and squeezed. The application unit can also be used to apply other materials, for example an adhesive.

Claims (9)

  1. Applicator unit (1) for a sealant, the said unit to be disposed on the mounting bracket (2) of an automatic riveting machine, wherein the mounting bracket has clamping elements for coupling the riveting machine to an assembly robot as well as couplings for transmitting energy and signals, wherein the applicator unit (1) has a carriage (4) for a support (5) with an applicator head (6), the carriage being mounted so as to be movable in a direction (x) by motor power in a guide (3) which is disposed on the mounting bracket and directed radially with respect to the riveting point, and wherein a transverse guide (7) is also disposed on the carriage (4) so that the support (5) is movable by motor power in a direction (y) relative to the carriage (4) and the applicator head (6) has a reservoir (8) for the sealant which is connected on the one had via an air-vent valve (28) to a pressure line and on the other hand to a discharge nozzle (10).
  2. Applicator unit according to Claim 1, characterised in that cylinders (11) are provided in order to actuate the carriage (4) and the support (5).
  3. Applicator unit according to Claim 1 or 2, characterised in that corresponding electric motors are provided in order to actuate the carriage (4) and the support (5).
  4. Applicator unit according to one of Claims 1 to 3, characterised in that corresponding hydraulic motors are provided in order to actuate the carriage (4) and the support (5).
  5. Applicator unit according to one of Claims 1 to 4, characterised in that the applicator head (6) has a clamping sleeve (27) into which a cartridge (8) can be inserted.
  6. Applicator unit according to one of Claims 1 to 5, characterised in that the housing (21) is connected to the support (5) by means of screws (22).
  7. Applicator unit according to one of Claims 1 to 6, characterised in that the housing (21) of the applicator head (6) is connected to the support (5) by means of screws (22).
  8. Applicator unit according to one of Claims 1 to 7, characterised in that the discharge nozzle (10) has a centring pin (30).
  9. Applicator unit according to one of Claims 1 to 8, characterised in that the centring pin (30) merges into a shoulder (31) from which a plurality of bores (33) disposed at the same angular spacing extend and open into the interior (32) of the discharge nozzle (10).
EP93117814A 1992-12-29 1993-11-03 Application unit for sealant Expired - Lifetime EP0604733B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4244404 1992-12-29
DE4244404A DE4244404C2 (en) 1992-12-29 1992-12-29 Application unit for a sealing compound for sealing riveted joints

Publications (2)

Publication Number Publication Date
EP0604733A1 EP0604733A1 (en) 1994-07-06
EP0604733B1 true EP0604733B1 (en) 1997-07-09

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Application Number Title Priority Date Filing Date
EP93117814A Expired - Lifetime EP0604733B1 (en) 1992-12-29 1993-11-03 Application unit for sealant

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EP (1) EP0604733B1 (en)
JP (1) JPH06254652A (en)
CA (1) CA2112428A1 (en)
DE (2) DE4244404C2 (en)
RU (1) RU2106927C1 (en)
UA (1) UA26398C2 (en)

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Publication number Priority date Publication date Assignee Title
CN106040519A (en) * 2016-08-03 2016-10-26 刘养青 Advertisement newspaper gluing device for use in accounting teaching

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Publication number Priority date Publication date Assignee Title
JPH01222851A (en) * 1988-03-03 1989-09-06 Kitamura Mach Co Ltd Method for detecting thrust force of main spindle of machine tool
CN104014710B (en) * 2014-05-16 2016-06-29 台州市旺捷达自动化设备有限公司 The automatic rivet equipment of wiper skeleton and using method thereof
CN106807876B (en) * 2016-12-16 2019-05-21 杭州吉众机电股份有限公司 Casing squeeze riveter replaces feeding device for nail and its operating method
CN115069493B (en) * 2022-06-15 2023-03-14 重庆工程职业技术学院 Sensor apparatus for producing based on light refraction

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US3350774A (en) * 1966-04-25 1967-11-07 Lockheed Aircraft Corp Sealant applying apparatus

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DE3232093A1 (en) * 1982-08-28 1984-03-01 Messerschmitt-Bölkow-Blohm GmbH, 8000 München AUTOMATIC RIVETING MACHINE
US4635827A (en) * 1985-02-06 1987-01-13 Grumman Aerospace Corporation Sealant applicator for rivet machine
FR2618706B1 (en) * 1987-07-29 1989-12-22 Recoules & Fils Ets DRILLING AND RIVETING DEVICE
US4951849A (en) * 1988-09-30 1990-08-28 The Boeing Company Sealant applicator and method for an automatic fastener machine
DE4019193A1 (en) * 1990-06-15 1991-12-19 Audi Ag Blind rivet with tubular rivet sleeve - has adhesive member applied to areas for better anti-corrosive security

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Publication number Priority date Publication date Assignee Title
US3350774A (en) * 1966-04-25 1967-11-07 Lockheed Aircraft Corp Sealant applying apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106040519A (en) * 2016-08-03 2016-10-26 刘养青 Advertisement newspaper gluing device for use in accounting teaching
CN106040519B (en) * 2016-08-03 2018-05-04 浙江广厦建设职业技术学院 A kind of Accounting Course publicity report glue spreading apparatus

Also Published As

Publication number Publication date
EP0604733A1 (en) 1994-07-06
DE4244404C2 (en) 1999-09-02
RU2106927C1 (en) 1998-03-20
UA26398C2 (en) 1999-08-30
DE4244404A1 (en) 1994-07-07
JPH06254652A (en) 1994-09-13
DE59306878D1 (en) 1997-08-14
CA2112428A1 (en) 1994-06-30

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