EP0832722B1 - Device for clamping and drilling - Google Patents

Device for clamping and drilling Download PDF

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Publication number
EP0832722B1
EP0832722B1 EP97113087A EP97113087A EP0832722B1 EP 0832722 B1 EP0832722 B1 EP 0832722B1 EP 97113087 A EP97113087 A EP 97113087A EP 97113087 A EP97113087 A EP 97113087A EP 0832722 B1 EP0832722 B1 EP 0832722B1
Authority
EP
European Patent Office
Prior art keywords
clamping
drilling
cylinder
feed
drill
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
EP97113087A
Other languages
German (de)
French (fr)
Other versions
EP0832722A1 (en
Inventor
Wolfgang Dipl.-Ing. Ende
Harald Dipl.-Ing. Schüler
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
Original Assignee
Airbus Operations GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Airbus Operations GmbH filed Critical Airbus Operations GmbH
Publication of EP0832722A1 publication Critical patent/EP0832722A1/en
Application granted granted Critical
Publication of EP0832722B1 publication Critical patent/EP0832722B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0057—Devices for securing hand tools to the work
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/561—Having tool-opposing, work-engaging surface
    • Y10T408/5626—Having tool-opposing, work-engaging surface with means to move Tool relative to other work-engaging structure along tool-axis
    • Y10T408/5627—Having sliding engagement therewith
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/563—Work-gripping clamp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/564—Movable relative to Tool along tool-axis
    • Y10T408/5653—Movable relative to Tool along tool-axis with means to bias Tool away from work

Definitions

  • the invention relates to a device for clamping and drilling at least two components to be connected to one another, a clamping part and a drilling part are arranged, the clamping part has a clamping bracket which with a Clamping element axially and against the feed direction, to a processing point indicative, from the open starting position to a clamping position by means of a clamping cylinder is movable and the drilling part has a drilling machine with a drill, the drilling machine via a feed drive coupled to the clamping cylinder is displaceable from the starting position in the direction of the processing point.
  • a sealing compound is introduced between the joining surfaces and the parts after manual alignment are stapled using a screw stapler.
  • the rivet are inserted into the prepared holes and the riveting process can be carried out become.
  • the invention has for its object to provide a device that the time required to produce a hole in at least two with each other connecting components reduced to a minimum and an automatic process of Clamping and drilling achieved without manual work. Because of the at least partial The location of the processing points, which is difficult to access spatially, is manual Positioning of the tools at the riveting point is easy and space-saving.
  • clamping and drilling of two together components to be connected can be realized in a single operation.
  • For the production of a hole is now only a manual preparation of the device according to the invention at the processing point and starting the clamping and drilling cycle necessary. All work steps to be carried out manually beforehand are thus automated.
  • clamping and drilling unit 1 shows a device for producing component connections, hereinafter referred to as clamping and drilling unit 1.
  • clamping and drilling unit 1 With this clamping and drilling unit 1, the components to be joined, such as bulkhead and bulkhead coupling on aircraft fuselage shells, can be clamped and drilled before riveting for producing riveted connections.
  • the functional principle of this clamping and drilling unit 1 can be seen from FIG. 1.
  • the clamping and drilling unit 1 has a clamping part 2 and a drilling part 15.
  • the clamping part 2 and the drilling part 15 are arranged on a common base body 6.
  • the clamping part 2 consists essentially of a clamping bracket 3 which can be moved into the clamping position or into the open starting position by a preferably pneumatically operated clamping cylinder 4.
  • the clamping bracket 3 is an almost U-shaped tubular element 7, a tube end 8 being guided in a longitudinal guide 11 in the base body 6 and the opposite tube end 9 forming the clamping element as a counterpart to a clamping sleeve 5.
  • the clamping sleeve 5 is arranged on the base body 6 so that it can clamp the components to be joined in the area of the drilling point and at the same time forms a casing of a drill 17.
  • the clamping sleeve 5 is provided with a cutout 14.
  • a further pipe element 10 is provided as a guide element running parallel to the pipe end 8.
  • the tubular element 10 is movable in a second longitudinal guide 12 which is provided in the base body 6 parallel to the first longitudinal guide 11.
  • the guides 11 and 12 are introduced in the upper region of the base body 6.
  • the tubular elements 7 and 10 of the clamping bracket 3 are preferably made of a material with a low weight.
  • the clamping cylinder 4 is also arranged in the region of the longitudinal guides 11 and 12 on the base body 6 and is connected with its piston rod to at least one tubular element 7 or 10. The clamping bracket 3 can thus be moved into the clamping position or into the open starting position.
  • the drilling part 15, which essentially consists of a pneumatic drilling machine 16 with a drill 17, a feed cylinder 18 and a damping device 19, is provided on the lower region of the base body 6.
  • the drill axis 17A of the drill 17 runs parallel to the longitudinal guides 11 and 12, so that the components are pressed together precisely at the drilling point with the clamping bracket 3 in connection with the clamping sleeve 5.
  • the drilling machine 16, the feed cylinder 18 and the pneumatic damper 19 are coupled to one another. A defined feed movement of the drilling machine 16 with the drill 17 is thus achieved, which enables an almost burr-free drilling. Furthermore, a clamping force of approx.
  • 40-60 daN must be applied between the clamping sleeve 5 and the clamping element 9 in order to prevent burrs or chips between the joining surfaces.
  • the required clamping force must be greater than the cutting force of the drill 17 and the force required for the components to be pressed together without a gap.
  • FIGS. 2 and 3 The basic sequence of a clamping and drilling process with the invention Clamping and drilling unit 1 is based on FIGS. 2 and 3 explained in more detail.
  • Figs. 2 and 3 is the clamping and drilling unit 1 in a first Embodiment can be seen.
  • This embodiment is characterized in that that the drill 17 is exposed only with the drill tip 20, i.e. from the Drill 17 enveloping clamping sleeve 5 protrudes the drill tip 20, which as Management level is trained and for positioning the clamping and drilling unit 1 at a processing point 13, preferably the drill tip 20 is inserted into a pilot hole of the component 23.
  • FIG. 2 shows the mobile clamping and Drilling unit 1 in start position.
  • the drill tip 20 is already at the processing point 13 positioned.
  • a pneumatic control valve 24 Controlled clamping and drilling process. Is in the start position shown in Fig. 2 the control valve 24 is still locked.
  • the control valve 24 is opened and the clamping cylinder 4 pressurized with compressed air via a compressed air line 26.
  • the clamp bracket 3 is moved in the direction of component 22 and touches down with its clamping element 9 the component 22.
  • the clamping sleeve 5 is provided, which Frame coupling 23 presses against frame 22.
  • the compressed air supply of the Clamping cylinder 4 must be large enough to achieve a sufficient clamping force (preferably approx.
  • the Drill 16 is equipped with automatic feed and damping.
  • the damping is implemented with a hydraulic brake 31.
  • the hydraulic Brake 31 is already in the start position with its piston rod 34 the stop 30 of the drill 17 in contact.
  • a feed line 33 is connected to the clamping cylinder 4 and allows the application of Compressed air for the automatic feed of the drilling machine 16 when the Clamping position is reached and the piston in the clamping cylinder 4 shortly before Stop 28 for opening the compressed air line 27 for driving the drill 17 is.
  • Compressed air is supplied via the released feed line 33 a drilling cylinder 15A, which the pneumatic drilling machine 16 axially in Presses in the direction of the drilling point 13 and thus a feed movement of the drilling machine 16 realized.
  • the hydraulic brake 31 is set so that a defined feed movement is achieved in order to achieve an almost burr-free To achieve a hole that makes reworking the hole unnecessary.
  • the Bore is now made in one pass in rivet quality.
  • the compressed air supply is interrupted.
  • control valve 24 as Pressure switch 35 is formed, which is released after completion of the bore is and thus the switch 35 springs back and interrupts the compressed air supply.
  • the clamping cylinder 4, the check valve 25 and the drill 16 are equipped with return springs 32 and all components move after the Compressed air back to the start position shown in Fig. 2. It is also conceivable the drilling machine 16 to provide a limit switch which, after completion of the Drilling automatically cuts off the compressed air supply.
  • FIG. 4 is the clamping and drilling unit 1 with a spring-loaded drill 16 evident.
  • the basic structure corresponds to that in FIGS. 2 and 3 shown embodiment, in which only the drill tip 20 from which the drill 17th enveloping clamping sleeve 5 protrudes.
  • the embodiment shown in Fig. 4 is intended for positioning at a processing point 13 that does not Has pilot hole in which the drill tip 20 can be inserted. Without springback would be a break at the start of the clamping and drilling process to fear the drill tip 20.
  • a spring 36 arranged on the drilling machine 16 which has an axial springback Drill 16 with drill 17 enables the distance that is necessary to achieve placement of the clamping sleeve 5 on the component for clamping and the drill tip 20 can be pressed into the clamping sleeve 5 by this distance to design.
  • the placement spring 36 is stronger for this, with a higher spring characteristic designed as the counteracting return spring 32.
  • FIG. 5 A second embodiment of the clamping and drilling unit 1 is shown in FIG. 5.
  • This second embodiment is characterized by an exposed drill 17, which is not encased in the front area by the clamping sleeve 5. This makes it possible to position the drill 17, in particular in the case of machining points 13 which are difficult to see.
  • the arrangement of the basic components, such as the clamping part 2 and the drilling part 16, is realized essentially as in the first embodiment of the clamping and drilling unit 1. Due to the more complex control that is necessary for the automatic sequence of the clamping and drilling process when the drill is exposed, a pulse valve 40, an OR valve 38, a check valve 43 at the feed end of the drilling machine 16 and associated compressed air or control lines are among others to be provided on the clamping and drilling unit 1.
  • FIGS. 6 to 9 The principle of operation of this second embodiment of the clamping and drilling unit 1 is shown in the following FIGS. 6 to 9 based on different working positions of a drilling cycle.
  • the pressurized lines and Components are dotted for better understanding.
  • FIG. 6 shows the clamping and drilling unit 1 in a functional diagram Starting position.
  • the pressure switch 35 is not pressed, although over a pressurized line 37 and an OR valve 38 the feed the drill 16 is pressurized and the drill 16 with the Drill 17 is axially extended, which is the positioning of the drill 17 on the Processing point 13 simplified.
  • the drive of the drilling machine 16 is depressurized.
  • the piston of the clamping cylinder 4 is extended Position.
  • the hydraulic brake 31 is inserted into a cylinder 41.
  • the piston rod 34 of the hydraulic brake 31 does not yet touch the stop 30 on the pneumatic drill 16.
  • Fig. 7 the clamping and drilling unit 1 is clamping and drilling evident.
  • the pressure switch 35 is pressed.
  • a self-holding pulse valve 40 which interrupt the compressed air line 26 to the clamping cylinder 4 can is closed. So that pressure is on the compressed air line 26 Clamping cylinder 4 on and the piston of the clamping cylinder 4 begins to retract and clamps the components 22, 23.
  • the clamping with the clamp 3 is for this embodiment of the clamping and drilling unit 1 is not shown in detail, in terms of function, however, runs as already explained in the description of FIG. 3.
  • the drill 16 with the Drill 17 axially due to the clamping force occurring against the feed direction pressed.
  • the stop 28 is provided, which is connected to the check valve 25.
  • the piston of the clamping cylinder 4 abuts the stop 28, which thus opens the shut-off valve 25 and thus via a compressed air line 27 a drilling cylinder 1 5A of the pneumatically driven drill 16 releases compressed air necessary for the drive.
  • the drilling machine 16 runs on Release of the compressed air.
  • Via a leading to a feed cylinder 41 Compressed air line 29, the feed cylinder 41 is pressurized when the piston in the clamping cylinder 4 has reached the stop 28.
  • the hydraulic Brake 31 is extended from the feed cylinder 41 and reaches with it Piston rod 34 the stop 30 on the drill 16.
  • Via the feed line 33 is also from the pressurized feed cylinder 41st Compressed air to the pneumatic via the OR valve 38 and the line 37 Drill 16 directed and the feed of the drill 16 in motion set.
  • the pressure switch 35 is still depressed.
  • the drill 16 has reached its feed end position. In this position the hydraulic brake 31 reaches the check valve 43 and triggers a control signal via the control lines 27A and 42 on the pulse valve 40.
  • the pulse valve 40 interrupts the connection to the compressed air line 26 and switches the compressed air line 26 depressurized.
  • FIG. 9 the state of the clamping and drilling unit 1 due to the Control signal automatically running operations can be seen.
  • the return spring moves the piston of the clamping cylinder 4 in the start position and Clamp is opened. Due to the piston return movement in the clamping cylinder 4 is also the compressed air supply for the feed via the lines 29 and 33 interrupted and by means of the return spring 32, the drill 16 with drill 17 again positioned in the retracted position.
  • the Feed cylinder 41 is also depressurized and the hydraulic Brake 31 retracts. With the return movement of the piston in the clamping cylinder 4 at the check valve 25, the compressed air line 27 for driving the drill 16 interrupted, the drilling machine 16 is therefore also depressurized.
  • This state of the clamping and drilling unit 1 is shown in FIG. 9.
  • the drill 17 After completion of the drilling process, the drill 17 is out of the borehole again 13 extended and takes the starting position. At this time the pressure switch 35 is still actuated. After the clamping and drilling process, the pressure switch 35 is released and the compressed air supply for the compressed air line 27 is interrupted. The clamping and drilling unit 1 moves into the starting position shown in FIG. 6. Pressure is now applied on the line 37, the feed via the OR valve 38 the drilling machine 16 is pressurized. The drill 16 with the drill 17 is axially extended and the drill 17 is positioned next to it Processing point 13 can take place. This is obtained via a control line 39 Pulse valve 40 the signal, the connection to the compressed air line 26 again to manufacture. The clamping and drilling unit is for making a new borehole 1 now ready to start. This process then runs as described Working conditions in the figures 6 to 9 from.

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  • Engineering & Computer Science (AREA)
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  • Drilling And Boring (AREA)
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Description

Die Erfindung betrifft eine Vorrichtung zum Klemmen und Bohren von mindestens zwei miteinander zu verbindenen Bauteilen, wobei an einem Grundkörper ein Klemmteil und ein Bohrteil angeordnet sind, das Klemmteil einen Klemmbügel aufweist, der mit einem Klemmelement axial und entgegen der Vorschubrichtung, zu einer Bearbeitungsstelle hinweisend, aus der offenen Startposition in eine Klemmposition mittels eines Klemmzylinders bewegbar ist und das Bohrteil eine Bohrmaschine mit einem Bohrer aufweist, wobei die Bohrmaschine über einen mit dem Klemmzylinder gekoppelten Vorschubantrieb von der Startposition in Richtung Bearbeitungsstelle verschiebbar ist.The invention relates to a device for clamping and drilling at least two components to be connected to one another, a clamping part and a drilling part are arranged, the clamping part has a clamping bracket which with a Clamping element axially and against the feed direction, to a processing point indicative, from the open starting position to a clamping position by means of a clamping cylinder is movable and the drilling part has a drilling machine with a drill, the drilling machine via a feed drive coupled to the clamping cylinder is displaceable from the starting position in the direction of the processing point.

Bei der Fertigung von Flugzeugbauteilen, insbesondere zum Verbinden von Spanten und Spantkupplungen, werden eine Vielzahl von Nietverbindungen benötigt, für die entsprechende Bohrungen vorzusehen sind. Üblicherweise werden die zu fügenden Bauteile, wie Spant und Spantkupplung manuell zueinander ausgerichtet und in der ausgerichteten Position gespannt. Die in einem Bauteil (Spantkupplung, Spant, Halter) vorhandenen Vorbohrungen werden auf die Spantprofile mittels Abbohren übertragen. Nach diesem Arbeitsgang erfolgt ein manuelles Aufbohren der Vorbohrungen auf das Fertigmaß. Um die hergestellten Bohrungen zu Entgraten und die Bauteile von Spänen u. a. zu reinigen, müssen die Spannelemente entfernt werden und die schon zusammengefügten Teile noch einmal getrennt werden. Nach dem Reinigungsvorgang werden Spant- und Spantkupplung wieder zusammengefügt, wobei zumindest in Teilbereichen des Bauteils eine Dichtmasse zwischen die Fügeflächen eingebracht wird und die Teile nach dem manuellen Ausrichten mittels Schraubhefter geheftet werden. Die Niete werden in die vorbereiteten Bohrungen gesteckt und der Nietvorgang kann durchgeführt werden. In the manufacture of aircraft components, in particular for connecting frames and Frame couplings, a variety of rivet connections are needed for that appropriate holes must be provided. Usually the ones to be joined Components such as bulkhead and bulkhead coupling are manually aligned with each other and in the aligned position excited. The in one component (frame coupling, frame, holder) Existing pre-drilled holes are transferred to the frame profiles by drilling. After this step, the pilot holes are drilled out manually Finished size. To deburr the drilled holes and the components of chips u. a. To clean, the clamping elements must be removed and the already assembled Parts are separated again. After the cleaning process Frame and frame coupling reassembled, at least in some areas of the component, a sealing compound is introduced between the joining surfaces and the parts after manual alignment are stapled using a screw stapler. The rivet are inserted into the prepared holes and the riveting process can be carried out become.

Diese Vorgehensweise zum Herstellen von Nietverbindungen zwischen Spant und Spantkupplung ist zeitaufwendig und somit sehr kostenintensiv.
Aus US-A-3 060 769 ist eine Bohrvorrichtung bekannt, die automatisch mit einer vorbestimmten Vorschubkraft das Bohren ausführen kann. Das Klemmen des Bauteils erfolgt mittels Handkraft, wobei eine Klemmbacke in Klemmrichtung bewegt werden kann. Eine an einer Basiseinheit angeordnete Bohrmaschine wird mittels eines Hebels und eines Federelementes entgegen der Vorschubrichtung vorgespannt. Die damit erzielte Vorschubkraft ermöglicht nach dem Einschalten der elektrischen Bohrmaschine einen automatischen Vorschub zum Bohren des Bohrloches. Mit dieser Lösung kann jedoch nicht ein völlig automatischer Ablauf des Klemmens und Bohrens ohne manuelle Tätigkeit erzielt werden.This procedure for producing riveted connections between the frame and the frame coupling is time-consuming and therefore very cost-intensive.
From US-A-3 060 769 a drilling device is known which can carry out the drilling automatically with a predetermined feed force. The component is clamped by hand, whereby a clamping jaw can be moved in the clamping direction. A drill arranged on a base unit is pretensioned against the feed direction by means of a lever and a spring element. The feed force thus achieved enables an automatic feed for drilling the borehole after the electric drill is switched on. With this solution, however, a completely automatic sequence of clamping and drilling can not be achieved without manual work.

Demgemäß liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die den Zeitaufwand zum Herstellen einer Bohrung in zumindest zwei miteinander zu verbindenen Bauteilen auf ein Minimum reduziert und einen automatischen Ablauf von Klemmen und Bohren ohne manuelle Tätigkeit erzielt. Aufgrund der zumindest teilweisen räumlich schlecht zugänglichen Lage der Bearbeitungsstellen ist eine manuelle Positionierung der Werkzeuge an der Nietstelle einfach und platzsparend zu realisieren.Accordingly, the invention has for its object to provide a device that the time required to produce a hole in at least two with each other connecting components reduced to a minimum and an automatic process of Clamping and drilling achieved without manual work. Because of the at least partial The location of the processing points, which is difficult to access spatially, is manual Positioning of the tools at the riveting point is easy and space-saving.

Diese Aufgabe wird mit den in Patentanspruch 1 angegebenen Maßnahmen gelöst.This object is achieved with the measures specified in claim 1.

Dabei ist inbesondere von Vorteil, daß das Klemmen und Bohren von zwei miteinander zu verbindenden Bauteilen in nur einem einzigen Arbeitsgang realisiert werden kann. Für die Fertigung einer Bohrung ist nunmehr nur noch ein manuelles Ansetzen der erfindungsgemäßen Vorrichtung an der Bearbeitungsstelle und das Starten des Klemm- und Bohrzyklusses notwendig. Alle vorher manuell auszuführenden Arbeitsschritte sind somit automatisiert.It is particularly advantageous that the clamping and drilling of two together components to be connected can be realized in a single operation. For the production of a hole is now only a manual preparation of the device according to the invention at the processing point and starting the clamping and drilling cycle necessary. All work steps to be carried out manually beforehand are thus automated.

Weiterbildungen und zweckmäßige Ausgestaltungen ergeben sich aus den Unteransprüchen 2 - 10. Further developments and expedient refinements result from the subclaims 2 - 10.

Die Erfindung wird nachstehend beschrieben, wobei die Ausbildung der Vorrichtung anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert ist. In den Figuren sind gleiche Bauteile mit gleichen Bezugszeichen versehen.The invention is described below, the design of the device based on the embodiments shown in the drawing is explained. In the Figures are the same components with the same reference numerals.

Die Zeichnung zeigt

in Fig. 1
das Funktionsprinzip einer mobilen Klemm- und Bohreinheit,
in Fig. 2
die Klemm- und Bohreinheit in einer ersten Ausführungsform in Startposition,
in Fig. 3
die Klemm- und Bohreinheit gemäß Fig. 2 in Arbeitsposition,
in Fig. 4
die Klemm- und Bohreinheit der ersten Ausführungsform mit rückfederbarem Bohrteil,
in Fig. 5
die Klemm- und Bohreinheit in einer zweiten Ausführungsform und
in Fign. 6 bis 9
das Funktionsprinzip der Klemm- und Bohreinheit der zweiten Ausführungsform in vier Arbeitspositionen eines Bohrzyklusses.
The drawing shows
in Fig. 1
the principle of operation of a mobile clamping and drilling unit,
in Fig. 2
the clamping and drilling unit in a first embodiment in the starting position,
in Fig. 3
2 in the working position,
in Fig. 4
the clamping and drilling unit of the first embodiment with resilient drilling part,
in Fig. 5
the clamping and drilling unit in a second embodiment and
in fig. 6 to 9
the principle of operation of the clamping and drilling unit of the second embodiment in four working positions of a drilling cycle.

In der Fig. 1 ist eine Vorrichtung zum Herstellen von Bauteilverbindungen, im weiteren Klemm- und Bohreinheit 1 genannt, gezeigt. Mit dieser Klemm- und Bohreinheit 1 können für das Herstellen von Nietverbindungen die zu fügenden Bauteile, wie Spant und Spantkupplung an Flugzeug-Rumpfschalen, vor dem Nieten geklemmt und gebohrt werden.
Aus der Fig. 1 ist das Funktionsprinzip dieser Klemm- und Bohreinheit 1 ersichtlich. Die Klemm- und Bohreinheit 1 weist ein Klemmteil 2 und ein Bohrteil 15 auf. Das Klemmteil 2 und das Bohrteil 15 sind auf einem gemeinsamen Grundkörper 6 angeordnet. Das Klemmteil 2 besteht im wesentlichen aus einem Klemmbügel 3, der von einem vorzugsweise pneumatisch betriebenen Klemmzylinder 4 in die Klemmposition bzw. in die offene Startposition bewegbar ist. 1 shows a device for producing component connections, hereinafter referred to as clamping and drilling unit 1. With this clamping and drilling unit 1, the components to be joined, such as bulkhead and bulkhead coupling on aircraft fuselage shells, can be clamped and drilled before riveting for producing riveted connections.
The functional principle of this clamping and drilling unit 1 can be seen from FIG. 1. The clamping and drilling unit 1 has a clamping part 2 and a drilling part 15. The clamping part 2 and the drilling part 15 are arranged on a common base body 6. The clamping part 2 consists essentially of a clamping bracket 3 which can be moved into the clamping position or into the open starting position by a preferably pneumatically operated clamping cylinder 4.

Der Klemmbügel 3 ist in der gezeigten Ausführungsform ein nahezu u-förmig gebogenes Rohrelement 7, wobei ein Rohrende 8 in einer Längsführung 11 im Grundkörper 6 geführt ist und das entgegengesetzte Rohrende 9 das Klemmelement als Gegenstück zu einer Klemmhülse 5 bildet. Die Klemmhülse 5 ist am Grundkörper 6 so angeordnet, daß sie im Bereich der Bohrstelle die zu fügenden Bauteile klemmen kann und gleichzeitig eine Umhüllung eines Bohrers 17 bildet. Um beim Bohrvorgang eine Späneabfuhr zu ermöglichen, ist die Klemmhülse 5 mit einer Aussparung 14 versehen. Für eine präzise Bewegung des Klemmbügels 3 ist ein weiteres Rohrelement 10 als parallel zum Rohrende 8 verlaufendes Führungselement vorgesehen. Das Rohrelement 10 ist in einer zweiten Längsführung 12 bewegbar, die parallel zur ersten Längsführung 11 im Grundkörper 6 vorgesehen ist. Die Führungen 11 und 12 sind im oberen Bereich des Grundkörpers 6 eingebracht. Um die gesamte Klemm- und Bohreinheit 1 als ein mobiles Gerät leicht zu gestalten, sind die Rohrelemente 7 und 10 des Klemmbügels 3 vorzugsweise aus einem Werkstoff mit geringem Gewicht gefertigt.
Der Klemmzylinder 4 ist im Bereich der Längsführungen 11 und 12 ebenfalls auf dem Grundkörper 6 angeordnet und mit seiner Kolbenstange zumindest mit einem Rohrelement 7 oder 10 verbunden. Damit kann der Klemmbügel 3 in die Klemmposition oder in die offene Startposition bewegt werden. Das Bohrteil 15, welches im wesentlichen aus einer pneumatischen Bohrmaschine 16 mit Bohrer 17, einem Vorschubzylinder 18 und einer Dämpfungseinrichtung 19 besteht, ist am unteren Bereich des Grundkörpers 6 vorgesehen. Die Bohrerachse 17A des Bohrers 17 verläuft parallel zu den Längsführungen 11 und 12, sodaß mit dem Klemmbügel 3 in Verbindung mit der Klemmhülse 5 die Bauteile an der Bohrstelle präzise zusammengedrückt werden. Die Bohrmaschine 16, der Vorschubzylinder 18 und der pneumatische Dämpfer 19 sind miteinander gekoppelt. Damit wird eine definierte Vorschubbewegung der Bohrmaschine 16 mit dem Bohrer 17 erreicht, die eine nahezu gratfreie Bohrung ermöglicht. Weiterhin ist eine Klemmkraft von ca. 40-60 daN zwischen Klemmhülse 5 und Klemmelement 9 aufzubringen, um Grat bzw. Späne zwischen den Fügeflächen zu verhindern. Die erforderliche Klemmkraft muß größer als die Schnittkraft des Bohrers 17 sowie die zum spaltfreien Zusammendrücken der Bauteile erforderlichen Kraft sein.In the embodiment shown, the clamping bracket 3 is an almost U-shaped tubular element 7, a tube end 8 being guided in a longitudinal guide 11 in the base body 6 and the opposite tube end 9 forming the clamping element as a counterpart to a clamping sleeve 5. The clamping sleeve 5 is arranged on the base body 6 so that it can clamp the components to be joined in the area of the drilling point and at the same time forms a casing of a drill 17. To enable chips to be removed during the drilling process, the clamping sleeve 5 is provided with a cutout 14. For a precise movement of the clamping bracket 3, a further pipe element 10 is provided as a guide element running parallel to the pipe end 8. The tubular element 10 is movable in a second longitudinal guide 12 which is provided in the base body 6 parallel to the first longitudinal guide 11. The guides 11 and 12 are introduced in the upper region of the base body 6. In order to make the entire clamping and drilling unit 1 light as a mobile device, the tubular elements 7 and 10 of the clamping bracket 3 are preferably made of a material with a low weight.
The clamping cylinder 4 is also arranged in the region of the longitudinal guides 11 and 12 on the base body 6 and is connected with its piston rod to at least one tubular element 7 or 10. The clamping bracket 3 can thus be moved into the clamping position or into the open starting position. The drilling part 15, which essentially consists of a pneumatic drilling machine 16 with a drill 17, a feed cylinder 18 and a damping device 19, is provided on the lower region of the base body 6. The drill axis 17A of the drill 17 runs parallel to the longitudinal guides 11 and 12, so that the components are pressed together precisely at the drilling point with the clamping bracket 3 in connection with the clamping sleeve 5. The drilling machine 16, the feed cylinder 18 and the pneumatic damper 19 are coupled to one another. A defined feed movement of the drilling machine 16 with the drill 17 is thus achieved, which enables an almost burr-free drilling. Furthermore, a clamping force of approx. 40-60 daN must be applied between the clamping sleeve 5 and the clamping element 9 in order to prevent burrs or chips between the joining surfaces. The required clamping force must be greater than the cutting force of the drill 17 and the force required for the components to be pressed together without a gap.

Der prinzipielle Ablauf eines Klemm- und Bohrvorganges mit der erfindungsgemäßen Klemm- und Bohreinheit 1 wird anhand der Fign. 2 und 3 näher erläutert. In den Fign. 2 und 3 ist die Klemm- und Bohreinheit 1 in einer ersten Ausführungsform ersichtlich. Diese Ausführungsform ist dadurch gekennzeichnet, daß der Bohrer 17 nur mit der Bohrerspitze 20 freiliegt, d.h. aus der den Bohrer 17 umhüllenden Klemmhülse 5 ragt die Bohrerspitze 20 heraus, die als Führungsstufe ausgebildet ist und zur Positionierung der Klemm- und Bohreinheit 1 an einer Bearbeitungsstelle 13 dient, wobei vorzugsweise die Bohrerspitze 20 in eine Vorbohrung des Bauteils 23 eingeführt wird. An dieser Stelle wird zwischen Spant 22 und Spantkupplung 23 an einer Flugzeugrumpfhaut 21 eine Nietverbindung hergestellt werden. Die Fig. 2 zeigt die mobile Klemm- und Bohreinheit 1 in Startposition. Die Bohrerspitze 20 ist bereits an der Bearbeitungsstelle 13 positioniert. Mit einem pneumatischen Steuerventil 24 wird der Klemm- und Bohrvorgang gesteuert. In der in Fig. 2 gezeigten Startposition ist das Steuerventil 24 noch gesperrt. Um das Klemmen und Bohren gemäß Fig. 3 auszuführen, wird das Steuerventil 24 geöffnet und der Klemmzylinder 4 wird über eine Druckluftleitung 26 mit Druckluft beaufschlagt. Der Klemmbügel 3 wird in Richtung Bauteil 22 bewegt und setzt mit seinem Klemmelement 9 auf das Bauteil 22 auf. Als Gegenstück ist die Klemmhülse 5 vorgesehen, die die Spantkupplung 23 an den Spant 22 andrückt. Die Druckluftbeaufschlagung des Klemmzylinders 4 muß so groß sein, daß eine ausreichende Klemmkraft erreicht wird (vorzugsweise ca. 40 - 60 daN) und sie hält solange an, bis der Bohrvorgang beendet ist. Mit Federkraft wird der Klemmbügel 3 nach Beendigung der Druckluftzufuhr wieder in die Startposition bewegt. Am zylinderseitigen Ende des Klemmzylinders 4 ist ein Anschlag 28 vorgesehen, der mit einem Sperrventil 25 verbunden ist. Bei Erreichen der Klemmposition stößt der Kolben an den Anschlag 28, der damit das Sperrventil 25 öffnet und somit über eine Druckluftleitung 27 der pneumatisch angetriebenen Bohrmaschine 16 die für den Antrieb notwendige Druckluft freigibt. Nunmehr kann im geklemmten Zustand der Bauteile 22 und 23 der Bohrvorgang durchgeführt werden. Die Bohrmaschine 16 ist dafür mit automatischem Vorschub und Dämpfung ausgestattet. Die Dämpfung wird mit einer Hydraulikbremse 31 realisiert. Die hydraulische Bremse 31 ist in der Startposition mit ihrer Kolbenstange 34 bereits mit dem Anschlag 30 der Bohrmaschine 17 in Kontakt. Eine Vorschubleitung 33 ist am Klemmzylinder 4 angeschlossen und ermöglicht das Beaufschlagen der Druckluft für den automatischen Vorschub der Bohrmaschine 16, wenn die Klemmposition erreicht ist und der Kolben im Klemmzylinder 4 kurz vor dem Anschlag 28 zum Öffnen der Druckluftleitung 27 für den Antrieb der Bohrmaschine 17 ist. Über die freigegebene Vorschubleitung 33 wird Druckluft zu einem Bohrzylinder 15A geleitet, die die pneumatische Bohrmaschine 16 axial in Richtung Bohrstelle 13 drückt und so eine Vorschubbewegung der Bohrmaschine 16 realisiert. Die hydraulische Bremse 31 ist so eingestellt, daß eine definierte Vorschubbewegung erreicht wird, um somit eine nahezu gratfreie Bohrung zu erreichen, die eine Nacharbeit des Bohrloches unnötig macht. Die Bohrung wird nunmehr in einem Arbeitsgang in Paßnietqualität gefertigt. Nach Beendigung des Bohrvorganges wird die Druckluftzufuhr unterbrochen. Das ist in der gezeigten Ausführung dadurch realisiert, daß das Steuerventil 24 als Druckschalter 35 ausgebildet ist, der nach Fertigstellung der Bohrung losgelassen wird und somit der Schalter 35 zurückfedert und die Druckluftzufuhr unterbricht. Der Klemmzylinder 4, das Sperrventil 25 und die Bohrmaschine 16 sind mit Rückholfedern 32 ausgestattet und alle Bauteile fahren nach Wegfall der Druckluft wieder in die in Fig. 2 gezeigten Startposition. Denkbar ist auch, an der Bohrmaschine 16 einen Endschalter vorzusehen, der nach Fertigstellung der Bohrung automatisch die Druckluftzufuhr unterbricht.The basic sequence of a clamping and drilling process with the invention Clamping and drilling unit 1 is based on FIGS. 2 and 3 explained in more detail. In Figs. 2 and 3 is the clamping and drilling unit 1 in a first Embodiment can be seen. This embodiment is characterized in that that the drill 17 is exposed only with the drill tip 20, i.e. from the Drill 17 enveloping clamping sleeve 5 protrudes the drill tip 20, which as Management level is trained and for positioning the clamping and drilling unit 1 at a processing point 13, preferably the drill tip 20 is inserted into a pilot hole of the component 23. At this point between frame 22 and frame coupling 23 on an aircraft fuselage skin 21 Rivet connection to be made. Fig. 2 shows the mobile clamping and Drilling unit 1 in start position. The drill tip 20 is already at the processing point 13 positioned. With a pneumatic control valve 24 Controlled clamping and drilling process. Is in the start position shown in Fig. 2 the control valve 24 is still locked. To clamp and drill according to FIG. 3 to execute, the control valve 24 is opened and the clamping cylinder 4 pressurized with compressed air via a compressed air line 26. The clamp bracket 3 is moved in the direction of component 22 and touches down with its clamping element 9 the component 22. As a counterpart, the clamping sleeve 5 is provided, which Frame coupling 23 presses against frame 22. The compressed air supply of the Clamping cylinder 4 must be large enough to achieve a sufficient clamping force (preferably approx. 40 - 60 daN) and it continues until the drilling process is finished. With spring force, the clamping bracket 3 is at the end of Compressed air supply moved back to the start position. At the cylinder end of the clamping cylinder 4, a stop 28 is provided, which has a check valve 25 is connected. When the clamping position is reached, the piston hits the stop 28, which thus opens the check valve 25 and thus via a Compressed air line 27 of the pneumatically driven drill 16 for releases the drive the necessary compressed air. Now in the clamped State of the components 22 and 23 of the drilling process are carried out. The Drill 16 is equipped with automatic feed and damping. The damping is implemented with a hydraulic brake 31. The hydraulic Brake 31 is already in the start position with its piston rod 34 the stop 30 of the drill 17 in contact. A feed line 33 is connected to the clamping cylinder 4 and allows the application of Compressed air for the automatic feed of the drilling machine 16 when the Clamping position is reached and the piston in the clamping cylinder 4 shortly before Stop 28 for opening the compressed air line 27 for driving the drill 17 is. Compressed air is supplied via the released feed line 33 a drilling cylinder 15A, which the pneumatic drilling machine 16 axially in Presses in the direction of the drilling point 13 and thus a feed movement of the drilling machine 16 realized. The hydraulic brake 31 is set so that a defined feed movement is achieved in order to achieve an almost burr-free To achieve a hole that makes reworking the hole unnecessary. The Bore is now made in one pass in rivet quality. To At the end of the drilling process, the compressed air supply is interrupted. This is realized in the embodiment shown in that the control valve 24 as Pressure switch 35 is formed, which is released after completion of the bore is and thus the switch 35 springs back and interrupts the compressed air supply. The clamping cylinder 4, the check valve 25 and the drill 16 are equipped with return springs 32 and all components move after the Compressed air back to the start position shown in Fig. 2. It is also conceivable the drilling machine 16 to provide a limit switch which, after completion of the Drilling automatically cuts off the compressed air supply.

In Fig. 4 ist die Klemm- und Bohreinheit 1 mit rückfederbarer Bohrmaschine 16 ersichtlich. Der grundsätzliche Aufbau entspricht der in den Fign. 2 und 3 gezeigten Ausführung, bei der nur die Bohrerspitze 20 aus der den Bohrer 17 umhüllenden Klemmhülse 5 herausragt. Die in Fig. 4 gezeigte Ausführungsform ist für das Positionieren an einer Bearbeitungsstelle 13 vorgesehen, die keine Vorbohrung aufweist in der die Bohrerspitze 20 eingeführt werden kann. Ohne eine Rückfederung wäre beim Start des Klemm- und Bohrvorganges ein Bruch der Bohrerspitze 20 zu befürchten. Um dieses zu verhindern, ist eine Aufsetzfeder 36 an der Bohrmaschine 16 angeordnet, die eine axiale Rückfederung der Bohrmaschine 16 mit Bohrer 17 um den Abstand ermöglicht, der notwendig ist, um ein Aufsetzen der Klemmhülse 5 auf das Bauteil für das Klemmen zu erreichen und die Bohrerspitze 20 um diesen Abstand in die Klemmhülse 5 eindrückbar zu gestalten. Die Aufsetzfeder 36 ist dafür stärker, mit einer höheren Federkennlinie als die entgegengesetzt wirkende Rückholfeder 32 ausgebildet.4 is the clamping and drilling unit 1 with a spring-loaded drill 16 evident. The basic structure corresponds to that in FIGS. 2 and 3 shown embodiment, in which only the drill tip 20 from which the drill 17th enveloping clamping sleeve 5 protrudes. The embodiment shown in Fig. 4 is intended for positioning at a processing point 13 that does not Has pilot hole in which the drill tip 20 can be inserted. Without springback would be a break at the start of the clamping and drilling process to fear the drill tip 20. To prevent this, there is a spring 36 arranged on the drilling machine 16, which has an axial springback Drill 16 with drill 17 enables the distance that is necessary to achieve placement of the clamping sleeve 5 on the component for clamping and the drill tip 20 can be pressed into the clamping sleeve 5 by this distance to design. The placement spring 36 is stronger for this, with a higher spring characteristic designed as the counteracting return spring 32.

Eine zweite Ausführungsform der Klemm- und Bohreinheit 1 ist in Fig. 5 gezeigt. Diese zweite Ausführungsform ist durch einen freiliegenden Bohrer 17 gekennzeichnet, der im vorderen Bereich nicht von der Klemmhülse 5 umhüllt wird. Damit ist ein Positionieren des Bohrers 17 insbesondere bei schwer einsehbaren Bearbeitungsstellen 13 möglich.
Die Anordnung der grundlegenden Bauteile, wie Klemmteil 2 und Bohrteil 16 ist im wesentlichen wie in der ersten Ausführungsform der Klemm- und Bohreinheit 1 realisiert. Aufgrund der komplexeren Steuerung, die für den automatischen Ablauf des Klemm- und Bohrvorganges bei freiliegendem Bohrer notwendig ist, sind unter anderem zusätzlich ein Impulsventil 40, ein Oder-Ventil 38, ein Sperrventil 43 am Vorschubende der Bohrmaschine 16 und dazugehörige Druckluft- bzw. Steuerleitungen an der Klemm- und Bohreinheit 1 vorzusehen.A second embodiment of the clamping and drilling unit 1 is shown in FIG. 5. This second embodiment is characterized by an exposed drill 17, which is not encased in the front area by the clamping sleeve 5. This makes it possible to position the drill 17, in particular in the case of machining points 13 which are difficult to see.
The arrangement of the basic components, such as the clamping part 2 and the drilling part 16, is realized essentially as in the first embodiment of the clamping and drilling unit 1. Due to the more complex control that is necessary for the automatic sequence of the clamping and drilling process when the drill is exposed, a pulse valve 40, an OR valve 38, a check valve 43 at the feed end of the drilling machine 16 and associated compressed air or control lines are among others to be provided on the clamping and drilling unit 1.

Das Funktionsprinzip dieser zweiten Ausgestaltung der Klemm- und Bohreinheit 1 ist in den nachfolgenden Fign. 6 bis 9 anhand verschiedener Arbeitspositionen eines Bohrzyklusses dargestellt. Die druckbeaufschlagten Leitungen und Bauteile sind zum besseren Verständnis gepunktet gezeichnet.The principle of operation of this second embodiment of the clamping and drilling unit 1 is shown in the following FIGS. 6 to 9 based on different working positions of a drilling cycle. The pressurized lines and Components are dotted for better understanding.

Die Fig. 6 zeigt in einem Funktionsschema die Klemm- und Bohreinheit 1 in Startposition. Der Druckschalter 35 ist nicht gedrückt, wobei trotzdem über eine druckbeaufschlagte Leitung 37 und einem ODER-Ventil 38 der Vorschub der Bohrmaschine 16 druckbeaufschlagt ist und die Bohrmaschine 16 mit dem Bohrer 17 axial ausgefahren ist, was das Positionieren des Bohrers 17 an der Bearbeitungsstelle 13 vereinfacht. Der Antrieb der Bohrmaschine 16 ist drucklos. In dieser Position ist der Kolben des Klemmzylinders 4 in ausgefahrener Position. Die hydraulische Bremse 31 ist in einen Zylinder 41 eingefahren. Die Kolbenstange 34 der Hydraulikbremse 31 berührt noch nicht den Anschlag 30 an der pneumatischen Bohrmaschine 16.6 shows the clamping and drilling unit 1 in a functional diagram Starting position. The pressure switch 35 is not pressed, although over a pressurized line 37 and an OR valve 38 the feed the drill 16 is pressurized and the drill 16 with the Drill 17 is axially extended, which is the positioning of the drill 17 on the Processing point 13 simplified. The drive of the drilling machine 16 is depressurized. In this position, the piston of the clamping cylinder 4 is extended Position. The hydraulic brake 31 is inserted into a cylinder 41. The piston rod 34 of the hydraulic brake 31 does not yet touch the stop 30 on the pneumatic drill 16.

In Fig. 7 ist die Klemm- und Bohreinheit 1 im Arbeitsgang Klemmen und Bohren ersichtlich. Der Druckschalter 35 ist gedrückt. Ein selbsthaltendes Impulsventil 40, welches die Druckluftleitung 26 zum Klemmzylinder 4 unterbrechen kann, ist geschlossen. Damit liegt Druck über die Druckluftleitung 26 am Klemmzylinder 4 an und der Kolben des Klemmzylinders 4 beginnt einzufahren und klemmt die Bauteile 22, 23. Das Klemmen mit dem Klemmbügel 3 ist für diese Ausführungsform der Klemm- und Bohreinheit 1 nicht näher dargestellt, verläuft funktionsmäßig aber wie in der Beschreibung zur Fig. 3 bereits erläutert. Bei der Durchführung der Klemmung wird die Bohrmaschine 16 mit dem Bohrer 17 infolge der auftretenden Klemmkraft axial entgegen der Vorschubrichtung gedrückt. Am zylinderseitigen Ende des Klemmzylinders 4 ist der Anschlag 28 vorgesehen, der mit dem Sperrventil 25 verbunden ist. Bei Erreichen der Klemmposition stößt der Kolben des Klemmzylinders 4 an den Anschlag 28, der damit das Sperrventil 25 öffnet und somit über eine Druckluftleitung 27 auf einen Bohrzylinder 1 5A der pneumatisch angetriebenen Bohrmaschine 16 die für den Antrieb notwendige Druckluft freigibt. Die Bohrmaschine 16 läuft nach Freigabe der Druckluft. Über eine zu einem Vorschubzylinder 41 führende Druckluftleitung 29 wird der Vorschubzylinder 41 unter Druck gesetzt, wenn der Kolben im Klemmzylinder 4 den Anschlag 28 erreicht hat. Die hydraulische Bremse 31 ist aus dem Vorschubzylinder 41 ausgefahren und erreicht mit ihrer Kolbenstange 34 den Anschlag 30 an der Bohrmaschine 16. Über die Vorschubleitung 33 wird ebenfalls vom druckbeaufschlagten Vorschubzylinder 41 über das ODER-Ventil 38 und der Leitung 37 Druckluft zur pneumatischen Bohrmaschine 16 geleitet und der Vorschub der Bohrmaschine 16 in Gang gesetzt.In Fig. 7, the clamping and drilling unit 1 is clamping and drilling evident. The pressure switch 35 is pressed. A self-holding pulse valve 40, which interrupt the compressed air line 26 to the clamping cylinder 4 can is closed. So that pressure is on the compressed air line 26 Clamping cylinder 4 on and the piston of the clamping cylinder 4 begins to retract and clamps the components 22, 23. The clamping with the clamp 3 is for this embodiment of the clamping and drilling unit 1 is not shown in detail, in terms of function, however, runs as already explained in the description of FIG. 3. When carrying out the clamping, the drill 16 with the Drill 17 axially due to the clamping force occurring against the feed direction pressed. At the cylinder end of the clamping cylinder 4 is the stop 28 is provided, which is connected to the check valve 25. When reached the clamping position, the piston of the clamping cylinder 4 abuts the stop 28, which thus opens the shut-off valve 25 and thus via a compressed air line 27 a drilling cylinder 1 5A of the pneumatically driven drill 16 releases compressed air necessary for the drive. The drilling machine 16 runs on Release of the compressed air. Via a leading to a feed cylinder 41 Compressed air line 29, the feed cylinder 41 is pressurized when the piston in the clamping cylinder 4 has reached the stop 28. The hydraulic Brake 31 is extended from the feed cylinder 41 and reaches with it Piston rod 34 the stop 30 on the drill 16. Via the feed line 33 is also from the pressurized feed cylinder 41st Compressed air to the pneumatic via the OR valve 38 and the line 37 Drill 16 directed and the feed of the drill 16 in motion set.

In der Fig. 8 ist das Funktionsschema der Bohr- und Klemmeinheit 1 am Ende des Bohrvorganges gezeigt. Der Druckschalter 35 ist noch gedrückt. Die Bohrmaschine 16 ist an ihrer Vorschubendposition angelangt. In dieser Position erreicht die hydraulische Bremse 31 das Sperrventil 43 und löst ein Steuersignal über die Steuerleitungen 27A und 42 am Impulsventil 40 aus. Das Impulsventil 40 unterbricht die Verbindung zur Druckluftleitung 26 und schaltet die Druckluftleitung 26 drucklos.8 is the functional diagram of the drilling and clamping unit 1 at the end of the drilling process shown. The pressure switch 35 is still depressed. The drill 16 has reached its feed end position. In this position the hydraulic brake 31 reaches the check valve 43 and triggers a control signal via the control lines 27A and 42 on the pulse valve 40. The pulse valve 40 interrupts the connection to the compressed air line 26 and switches the compressed air line 26 depressurized.

In Fig. 9 ist der Zustand der Klemm- und Bohreinheit 1 aufgrund der durch das Steuersignal automatisch ablaufenden Arbeitsgänge ersichtlich. Die Rückholfeder bewegt den Kolben des Klemmzylinders 4 in die Startposition und der Klemmbügel wird geöffnet. Aufgrund der Kolbenrückbewegung im Klemmzylinder 4 wird auch die Druckluftversorgung für den Vorschub über die Leitungen 29 und 33 unterbrochen und mittels der Rückholfeder 32 wird die Bohrmaschine 16 mit Bohrer 17 wieder in der zurückgefahrenen Stellung positioniert. Der Vorschubzylinder 41 wird ebenfalls drucklos geschaltet und die hydraulische Bremse 31 fährt ein. Mit der Rückbewegung des Kolbens im Klemmzylinder 4 wird am Sperrventil 25 auch die Druckluftleitung 27 für den Antrieb der Bohrmaschine 16 unterbrochen, die Bohrmaschine 16 ist somit auch drucklos geschaltet. Dieser Zustand der Klemm- und Bohreinheit 1 wird in Fig. 9 gezeigt. Nach Beendigung des Bohrvorganges ist der Bohrer 17 wieder aus dem Bohrloch 13 herausgefahren und nimmt die Ausgangsposition ein. Zu diesem Zeitpunkt ist immer noch der Druckschalter 35 betätigt. Nach Ablauf des Klemm- und Bohrvorganges wird der Druckschalter 35 losgelassen und die Druckluftzufuhr für die Druckluftleitung 27 wird unterbrochen. Die Klemm- und Bohreinheit 1 verfährt in die in Fig. 6 gezeigte Startposition. Nunmehr erfolgt eine Druckbeaufschlagung auf die Leitung 37, die über das ODER-Ventil 38 den Vorschub der Bohrmaschine 16 druckbeaufschlagt. Die Bohrmaschine 16 mit dem Bohrer 17 ist axial ausgefahren und eine Positionierung des Bohrers 17 an der nächsten Bearbeitungsstelle 13 kann erfolgen. Über eine Steuerleitung 39 erhält das Impulsventil 40 das Signal, die Verbindung zur Druckluftleitung 26 wieder herzustellen. Für das Fertigen eines neuen Bohrloches ist die Klemm- und Bohreinheit 1 nunmehr startbereit. Dieser Vorgang läuft dann gemäß der beschriebenen Arbeitszustände in den Fign. 6 bis 9 ab. In Fig. 9, the state of the clamping and drilling unit 1 due to the Control signal automatically running operations can be seen. The return spring moves the piston of the clamping cylinder 4 in the start position and Clamp is opened. Due to the piston return movement in the clamping cylinder 4 is also the compressed air supply for the feed via the lines 29 and 33 interrupted and by means of the return spring 32, the drill 16 with drill 17 again positioned in the retracted position. The Feed cylinder 41 is also depressurized and the hydraulic Brake 31 retracts. With the return movement of the piston in the clamping cylinder 4 at the check valve 25, the compressed air line 27 for driving the drill 16 interrupted, the drilling machine 16 is therefore also depressurized. This state of the clamping and drilling unit 1 is shown in FIG. 9. After completion of the drilling process, the drill 17 is out of the borehole again 13 extended and takes the starting position. At this time the pressure switch 35 is still actuated. After the clamping and drilling process, the pressure switch 35 is released and the compressed air supply for the compressed air line 27 is interrupted. The clamping and drilling unit 1 moves into the starting position shown in FIG. 6. Pressure is now applied on the line 37, the feed via the OR valve 38 the drilling machine 16 is pressurized. The drill 16 with the drill 17 is axially extended and the drill 17 is positioned next to it Processing point 13 can take place. This is obtained via a control line 39 Pulse valve 40 the signal, the connection to the compressed air line 26 again to manufacture. The clamping and drilling unit is for making a new borehole 1 now ready to start. This process then runs as described Working conditions in the figures 6 to 9 from.

BezugszeichenReference numerals

1 -1 -
Klemm- und BohreinheitClamping and drilling unit
2 -2 -
KlemmteilClamping part
3 -3 -
KlemmbügelClamp
4 -4 -
KlemmzylinderClamping cylinder
5 -5 -
KlemmhülseClamping sleeve
6 -6 -
GrundkörperBasic body
7 -7 -
erstes Rohrelementfirst pipe element
8 -8th -
RohrendePipe end
9 -9 -
entgegengesetztes Rohrende (Klemmelement)opposite pipe end (clamping element)
10 -10 -
zweites Rohrelementsecond pipe element
11 -11 -
erste Längsführungfirst longitudinal guide
12 -12 -
zweite Längsführungsecond longitudinal guide
13 -13 -
BearbeitungsstelleProcessing point
14 -14 -
Aussparung an KlemmhülseCut-out on clamping sleeve
15 -15 -
BohrteilDrilling part
15A -15A -
BohrzylinderDrilling cylinder
16 -16 -
Bohrmaschinedrilling machine
17 -17 -
Bohrerdrill
17A -17A -
BohrerachseDrill axis
18 -18 -
VorschubzylinderFeed cylinder
19 -19 -
Dämpfungseinrichtung (Pneumatischer Dämpfer)Damping device (pneumatic damper)
20 -20 -
BohrerspitzeDrill tip
21 -21 -
RumpfhautTrunk skin
22 -22 -
SpantFrame
23 -23 -
SpantkupplungFrame coupling
24 -24 -
SteuerventilControl valve
25 -25 -
SperrventilCheck valve
26 -26 -
Druckluftleitung zum KlemmzylinderCompressed air line to the clamping cylinder
27 -27 -
Druckluftleitung zur BohrmaschineCompressed air line to the drill
27A -27A -
von Druckluftleitung 27 abgezweigte Steuerleitungcontrol line branched from compressed air line 27
28 -28 -
Anschlag für Kolben des Klemmzylinders 4Stop for the piston of the clamping cylinder 4
29 -29 -
DruckluftleitungCompressed air line
30 -30 -
Anschlag an BohrmaschineStop on the drill
31 -31 -
hydraulische Bremsehydraulic brake
32 -32 -
RückholfederReturn spring
33 -33 -
VorschubleitungFeed line
34 -34 -
Kolbenstange von hydraulischer BremsePiston rod from hydraulic brake
35 -35 -
DruckschalterPressure switch
36 -36 -
AufsetzfederTouchdown spring
37 -37 -
Leitungmanagement
38 -38 -
ODER-VentilOR valve
39 -39 -
Steuerleitung für Eingang Y des Ventils 40Control line for input Y of valve 40
40 -40 -
Impulsventil (selbsthaltend)Impulse valve (self-holding)
41 -41 -
Vorschubzylinder für 31Feed cylinder for 31
42 -42 -
Steuerleitung für Eingang Z des Ventils 40Control line for input Z of valve 40
43 -43 -
Sperrventil am VorschubendeStop valve at the feed end

Claims (10)

  1. Device for clamping and drilling at least two components (22, 23) which are to be connected to one another, wherein a clamping part (2) and a drilling part (15) are disposed on a base member (6), the drilling part (15) has a drilling machine (16) with a drill (17), and the clamping part (2) has a clamping bracket (3) which can be moved, with a clamping element (9), axially and oppositely to the direction of feed of the drilling machine and in a manner pointing towards a machining point (13), from the open starting position into a clamping position by means of a clamping cylinder (4), and wherein the drilling machine (16) can be displaced from the starting position in the direction of the processing point (13) via a feed drive (33) coupled to the clamping cylinder (4), characterised in that the piston which is movable in the clamping cylinder (4) generates a control signal when it reaches a predetermined position, and the drive (27) of the drilling machine can be switched on by means of the control signal after the clamping position of the clamping cylinder (4) has been reached.
  2. Device according to claim 1,
    characterised in that
    the clamping bracket (3) can be moved by one end (8) in at least one longitudinal guide (11, 12) in the upper region of the base member (6) by means of a clamping cylinder (4) and the opposite end of the tube forms the clamping element (9) in the region of the machining point (13).
  3. Device according to one of claims 1 or 2,
    characterised in that
    a clamping sleeve (5), which at least partially envelops the drill (17), is provided on the base member (6) as a counterpart to the clamping element (9), the clamping sleeve (5) and clamping element (9) pressing the components (22, 23) together in the region of the machining point (13) with adequate clamping force when in the clamping position.
  4. Device according to one of claims 1 to 3,
    characterised in that
    the drilling machine (16) is constructed as a pneumatic drilling machine.
  5. Device according to claim 4,
    characterised in that
    the piston which is movable in the clamping cylinder (4) is intended for opening, via a stop (28) belonging to a shut-off valve (25) disposed on the said clamping cylinder (4), a compressed-air line (27) for driving the drilling machine (16).
  6. Device according to one of claims 1 to 5,
    characterised in that
    the clamping cylinder (4) is connected to a drilling cylinder (15A) via a feed line (33), the clamping cylinder (4) which is pressurised after the clamping position is reached exerting pressure, via the feed line (33), on the drilling cylinder (15A) for a feed movement of the pneumatic drilling machine (16) against a damping arrangement (31).
  7. Device according to one of claims 1 to 6,
    characterised in that
    the damping arrangement (31) is constructed as a hydraulic brake for obtaining a defined feed movement.
  8. Device according to one of claims 1 to 7,
    characterised in that
    the compressed-air feed to the pressure lines (26, 27) has a pressure switch (35) which can be sprung back.
  9. Device according to one of claims 1 to 8,
    characterised in that
    the pneumatic cylinders (4, 15A, 41) which can be moved by pressurisation have restoring springs (32).
  10. Device according to one of claims 1 to 9,
    characterised in that
    a self-locking impulse valve (40), which receives a control signal via a control line (42) when the end feed position is reached and which interrupts the compressed-air feed to the clamping cylinder (4), is provided for controlling a drilling cycle.
EP97113087A 1996-09-24 1997-07-30 Device for clamping and drilling Expired - Lifetime EP0832722B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19639122A DE19639122A1 (en) 1996-09-24 1996-09-24 Clamping and drilling device
DE19639122 1996-09-24

Publications (2)

Publication Number Publication Date
EP0832722A1 EP0832722A1 (en) 1998-04-01
EP0832722B1 true EP0832722B1 (en) 2000-11-15

Family

ID=7806694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97113087A Expired - Lifetime EP0832722B1 (en) 1996-09-24 1997-07-30 Device for clamping and drilling

Country Status (3)

Country Link
US (1) US5961258A (en)
EP (1) EP0832722B1 (en)
DE (2) DE19639122A1 (en)

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DE10308089A1 (en) 2003-02-24 2004-09-02 Airbus Deutschland Gmbh Drilling assistance device for aiding in the use of a hand held power drill, has alignment, suction and depth setting units combined in a single device that is attached to a drill
US6935475B2 (en) * 2003-03-28 2005-08-30 Borgwarner, Inc. Electromagnetic clutch having ball ramp actuator and torsion spring
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JP6336862B2 (en) * 2014-09-04 2018-06-06 東芝テック株式会社 Liquid ejection device
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US9616503B2 (en) * 2014-09-10 2017-04-11 The Boeing Company Apparatuses and methods for processing a confined area of a workpiece
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US9862066B1 (en) * 2016-09-29 2018-01-09 The Boeing Company Systems and methods for control of foreign object debris
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Also Published As

Publication number Publication date
EP0832722A1 (en) 1998-04-01
US5961258A (en) 1999-10-05
DE59702634D1 (en) 2000-12-21
DE19639122A1 (en) 1998-04-02

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