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WO2004052590A1 - Systeme de perçage - Google Patents

Systeme de perçage Download PDF

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Publication number
WO2004052590A1
WO2004052590A1 PCT/EP2003/007539 EP0307539W WO2004052590A1 WO 2004052590 A1 WO2004052590 A1 WO 2004052590A1 EP 0307539 W EP0307539 W EP 0307539W WO 2004052590 A1 WO2004052590 A1 WO 2004052590A1
Authority
WO
WIPO (PCT)
Prior art keywords
drilling
feed
centering
feed block
centering device
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.)
Ceased
Application number
PCT/EP2003/007539
Other languages
German (de)
English (en)
Inventor
Uwe Kark
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.)
KARG AG
Original Assignee
KARG AG
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 KARG AG filed Critical KARG AG
Priority to AU2003257453A priority Critical patent/AU2003257453A1/en
Publication of WO2004052590A1 publication Critical patent/WO2004052590A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/002—Means to press a workpiece against a guide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B23B47/28—Drill jigs for workpieces
    • B23B47/287—Jigs for drilling plate-like workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q9/00—Arrangements for supporting or guiding portable metal-working machines or apparatus
    • B23Q9/0014—Portable machines provided with or cooperating with guide means supported directly by the workpiece during action

Definitions

  • the fuselages of large commercial aircraft are assembled section by section from preformed sheets that are riveted to the seams.
  • a large number of holes are required for this and similar work, the location of which is determined by centering holes in a drilling jig.
  • a drilling device is used, which is arranged on a carriage that is guided along the jig.
  • the carriage carries a centering device which interacts with the centering holes of the drilling jig.
  • the drilling device is fixedly mounted on a feed block which is movably guided relative to the carriage in the direction of the drilling axis and is provided with a feed drive.
  • the invention has for its object to provide a drilling assembly of the type mentioned in the preamble of claim 1, which is comparatively light and inexpensive and ensures high accuracy.
  • the solution lies in the features of claim 1 and preferably those of the subclaims.
  • both the centering device and the spindle of the drilling device are arranged on or in the feed block.
  • the spindle of the drilling device reaches through the centering device from the side facing away from the workpiece.
  • the arrangement is preferably such that a bearing tube which receives the spindle of the drilling device via a suitable bearing is fastened to the top of the feed block and projects into the centering device from above.
  • the centering device can be moved independently of the feed block, it is movable in relation to the feed block by at least approximately the movement distance of the feed block.
  • it is at least partially housed in an annular space which is formed between the wall of a receiving shaft of the feed block and the bearing tube of the drilling spindle ,
  • a holder for the easily detachable fastening of the exchangeable drill spindle drive motor is preferably provided on the top of the feed block.
  • This can be easily separated from the drilling spindle, in that its stub shaft is provided with a coupling which interacts with the drilling spindle and is brought into engagement by axially pushing the motor towards the spindle or is released in the opposite direction.
  • the stub shaft can be provided with a feather key and it engages in a bore in the spindle which contains an open end groove corresponding to the feather key.
  • the motor bracket and the part of the motor it receives are designed so that they allow the motor shaft to be precisely centered in relation to the drilling spindle. It is preferably provided with a quick release device.
  • the motor can be easily exchangeable or it can be changed by program control.
  • the centering device is expediently provided with a separate centering drive.
  • This can be formed by a spring that presses it down in relation to the feed block.
  • This spring is expediently formed by a gas spring so that its force can be easily adjusted.
  • an annular piston cylinder device is used for the centering drive, which is arranged between the wall of the receiving shaft and the centering device. These elements can also form the piston-cylinder device directly.
  • This drive is expediently weaker and more flexible in relation to the feed drive of the feed block.
  • the piston-cylinder device forming it has a smaller cross-section than a piston-cylinder device which forms the drive for the feed block, both being fed from the same compressed air source.
  • the centering device can be moved up to the jig or the workpiece in front of the feed block and the feed block can follow without being disturbed by the drive of the centering device which yields like an air spring. It may be sufficient to design this centering feed only as an air spring or mechanical spring and to dispense with the drive in the returning direction.
  • this measurement can be carried out automatically by letting the measuring path begin at the position of the tool which it occupies when the centering device first comes into contact with the workpiece surface.
  • This position is characterized in that the centering sleeve no longer follows the further feed movement of the feed block. This is determined by the fact that the centering sleeve is pressed by the centering drive against a stop of the feed block. This stop position is maintained as long as the centering sleeve can move with the feed block.
  • the stops separate from each other, which is determined by a suitable sensor, for example an inductive proximity sensor.
  • the signal is then fed to a control device which now measures the feed path.
  • the control device must be aware of the positions along the feed path with respect to said starting position at which control processes must be initiated. For example, it knows the distance that the tip of the tool still has to travel to the workpiece surface after the signal has arrived, and can therefore set the programmed machining parameters as soon as this distance has been traveled from the feed. The same applies at those points on the feed path where the material properties and thus the machining parameters change or at the end of the machining path when the feed has to be stopped. In order not to have to re-enter these positions each time the tool is changed, it is expedient to ensure that the tools are always inserted into the tool holder at a constant, predetermined distance from the feed block.
  • a linear motor is understood to mean a motor that generates a linear movement of an actuating element.
  • Fig. 4 is a section along line B-B of Fig. 5
  • Fig. 5 is a plan view of the arrangement
  • the carriage 1 which is formed in a box-like manner from a partially perforated floor 2 and from this rising side walls 3 on three sides, is movable by means of four rollers 4 on guide rails 9, which are connected to the gauge 25 and ensure that the drilling axis 5 over the line along which the holes are to be made.
  • a program-controlled drive can be provided which controls the carriage in such a way that the device is located at the places where the holes are to be made, with the exact centering then taking place with a special centering device which has centering holes 24 of the gauge 25 interacts.
  • the way in which the carriage is guided relative to the workpiece or the teaching is of no consequence to the invention.
  • the car could also be held by the arm of a robot.
  • the carriage 1 of the first embodiment contains two guide bolts 6, which run parallel to the direction of the drilling axis 5 and each carry the feed block 8 via a linear guide 7. This can be moved in the direction of the drilling axis 5 between two end positions, which are shown in FIGS. 1 and 3.
  • a pressure medium drive is provided for its feed, which is formed by a piston-cylinder device 10, 11.
  • the cylinder 10 is arranged laterally in the feed block 8 (based on the plane of the linear guide bearings 7).
  • the piston 11 is rigidly connected to the bottom 2 of the carriage 1.
  • the cylinder 10 is closed by a cover 12 above the piston 11, so that two cylinder spaces are created which can be supplied with pressure medium (for example compressed air) via a control and / or damping unit 13.
  • pressure medium for example compressed air
  • the feed block contains a bore 15, which forms the above-mentioned receiving shaft.
  • a narrowed section 16 at the lower end of this bore and the inner surface of a guide bush 17 inserted into this bore at the top form a guide for a centering sleeve 20.
  • This is axially displaceable in relation to the feed block between two end positions, which are shown in FIGS. 2 and 3 are. It has an annular piston 21 which projects radially outward to the surface of the bore 15 and which separates a cylinder space 22 above and below the annular piston 21 from the bore surface 15 and the centering sleeve 20.
  • the centering sleeve 20 can be raised or lowered in relation to the feed block 8 by controlled pressure medium supply to these cylinder spaces.
  • the cross-sectional area of these cylinder spaces is smaller than that of the piston-cylinder device 10, 11.
  • the centering sleeve 20 ends at the bottom in a centering pin 23 which is intended to cooperate with the centering holes 24 of the drilling jig 25, which predetermine the location of holes 27 to be produced in sheets 26.
  • a bracket 30 is fastened with screws which also serve to fasten the guide bushing 17.
  • the inner diameter 31 of the holder 30 corresponds exactly to the corresponding outer diameter of a drive motor 32, which is exchangeable in the bore 31 by means of a quick-release fastener 33 and yet is held precisely centered.
  • a bearing tube 34 projects centrally from the holder 30 into the receiving shaft and into the centering sleeve 20. It contains high-speed roller bearings 35 through which the drilling spindle 40 is mounted, which forms a tool holder 41 for a tool 42 at its front end.
  • a clamping system is expediently chosen which is light and short, and which ensures the centricity required for high speeds, for example the clamping system commercially available under the registered trademark TRIBOS. All the parts located in the receiving shaft can be removed from the feed block after loosening the screws 36 holding the holder 30.
  • An extraction pipe 45 serves to extract the drilling chips from the space 44 above the borehole, which is closed off by the centering sleeve.
  • the carriage 1 is moved by known means to a point in which its drilling axis 5 corresponds approximately to the location of a bore 27 to be produced. This state is shown in FIG. 1.
  • the centering sleeve 20 is moved forward until the centering pin 23 engages in the centering bore 24, as a result of which the arrangement is centered (FIG. 2).
  • Compressed air is now admitted into the lower cylinder space of the piston cylinder device 10, 11, so that the feed block 8 lowers when the drilling motor 32 rotates.
  • the feed rate can be controlled differently for each tool and material.
  • the centering sleeve 20 maintains its position and consequently rises in relation to the feed block 8.
  • the ring cylinder of the feed sleeve 20 has a smaller cross-sectional area than the piston cylinder device 10, 11 and therefore - if the same Presses presupposes - yields. Regardless of the tool feed, the position of the centering pin 17 is thereby secured because it is held in the centering position as if by a spring.
  • FIG. 7 which shows a view perpendicular to FIG. 6, one can also see the rail 9 and the rollers 4 of the carriage 1 interacting with it.
  • a parallel to the rail 9 is one
  • Auxiliary rail 9 "to see, which interacts with rollers 4" of the carriage 1.
  • the rails are connected to the template (not shown) via a structure 60.
  • the carriage 1 ' can be seen in FIG. 7, which is unnecessary if only those drilling points are to be approached which are parallel to the rails 4 in a row.
  • the feed rods 50 of two feed motors 51 are rigidly connected to the slide 1 '(or, if this is missing, to the carriage 1). These are high-precision, continuously electronically controlled electric motors, whose feed speed can be controlled between 0 and 200 mm / minute with a repeat accuracy of a few ⁇ m. The position of the feed rods 50 can therefore always be assumed to be the same. Centered between the feed motors 51, the feed block 8 'is rigidly connected to them in a symmetrical arrangement. Thanks to the arrangement of the feed motors symmetrical to the feed block and the drilling axis and the precise guidance of the feed rods 50 in the housings of the feed motors 51, a further guide for the feed block 8 'is unnecessary.
  • the feed block 8 ' is cup-shaped. As described above, its bore 15 forms the receiving shaft for receiving the centering sleeve 20 and the drilling spindle 40. Because of the description of the details, reference can be made to the first exemplary embodiment.
  • the parts contained in the receiving shaft are held in the feed block by a quick-release fastener designed as a bayonet ring 33 '.
  • the motor 32 with the spindle bearing 34, the spindle 40 and the tool 42 can therefore be easily replaced.
  • the upper cylinder space 22 communicates with a compressed gas storage space 52.
  • This arrangement acts as a gas spring on the annular piston 21 and thus on the centering sleeve 20 in a direction that pushes it downward.
  • the annular piston 21 bears against the annular collar 53 of the bore 15 of the feed block 8 '.
  • This ring collar 53 contains an inductive proximity switch 54 which emits a signal as soon as ring piston 21 lifts off the ring collar 53.
  • a box 56 which contains the electronic control unit 57, is arranged above the pressure vessel 52. It has a socket 58 at its upper end, into which, when the motor 32 is inserted into the feed block, a plug 59 connected to the motor 32 is coupled, which conveys the energy supply and the control commands for the drill drive.
  • the control unit is also connected to the feed motors 51 via connections which are not shown.
  • the shaft of the drive motor 32 and the adjoining spindle 40 contain a bore 54, for which above the housing ses of the motor 32, a connection 55 is provided.
  • the bore 54 is made (with suitable seals between its successive sections) through the tool 42 to the tool cutting edge. It is used to supply the tool with coolant and lubricant.
  • so-called minimal lubrication is used, which consists of compressed air mixed with a lubricant, for example oil, in the form of an aerosol.
  • the compressed air of this minimal lubrication escaping from the tool 42 takes the chips with it and is drawn off via a nozzle 56.
  • FIGS. 8 to 10 The sequence of the essential processing stations is shown in FIGS. 8 to 10.
  • the feed block 8 ' is lowered by the feed motors 51 at high speed.
  • the centering pin 23 of the centering sleeve 20 penetrates into the centering bore 24, as a result of which the arrangement is centered and locked against lateral forces.
  • the lowering of the feed block 8 ' continues until the centering pin 23 on the upper one to be drilled
  • Sheets 26 meets (Fig. 9). These are pressed together without play. Since the centering sleeve 20 can now no longer lower, its ring piston 21 lifts from the collar 53 of the feed block 8 'when the feed block 8' continues to lower. At this moment the sensor 54 responds and sends a corresponding signal to the control device 57. The feed position of the spindle reached at this moment forms the starting point for the now following measurement of the feed distance of the tool 42. This is namely in the clamping device 41 of the spindle 40 used so that it has a predetermined position in the
  • the control device is thus “aware” of the distance that the tool, starting from the signaled position, must still be advanced in order to start the drilling process. As soon as it has determined by means of feed measurement that the tool tip has reached the uppermost of the sheets 26, it ensures that the cooling lubrication is switched on and that the drilling for the upper is set Sheet metal provided feed speed and number of revolutions. From this position it is also possible to measure the distances in which different employment relationships may exist. If, for example, the sheets 26 are made of different materials (eg aluminum and titanium), the tool, while it is processing one sheet, must be operated at a different rotational speed and feed rate than when processing the other.
  • the sheets 26 are made of different materials (eg aluminum and titanium)
  • the control device can be programmed so that these different machining parameters, which relate to the feed speed of the motors 51 and the speed of rotation of the motor 32, are automatically changed as soon as the set feed distances have been measured. Finally, the end of machining is also determined in this way in order to be able to switch off the lubrication and to be able to retrieve the tool and the centering sleeve.

Landscapes

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

Abstract

L'invention concerne un système de perçage comprenant un chariot (1) portant un appareil foreur (23, 40, 42) et un dispositif de centrage (20, 23) destiné à coopérer avec les orifices de centrage (24) d'un gabarit de perçage (25). Un bloc d'avancement (8) solidaire de l'appareil foreur (32, 40, 42) se déplace dans le chariot dans le sens de l'axe de perçage (5) à l'aide d'un mécanisme d'avancement (10, 11). Le dispositif de centrage (20, 23) se déplace le long du bloc d'avancement (8) en direction de l'axe de perçage (5). La broche (40) de l'appareil foreur (32, 40, 42) traverse le dispositif de centrage (20) depuis l'arrière. Cela permet d'obtenir un système de perçage très compact. La broche de perçage peut être placée à proximité du site d'usinage, ce qui permet d'obtenir une grande précision. Le moteur de commande ainsi que la broche de perçage et l'outil sont facile à remplacer.
PCT/EP2003/007539 2002-12-11 2003-07-11 Systeme de perçage Ceased WO2004052590A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003257453A AU2003257453A1 (en) 2002-12-11 2003-07-11 Drill system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20219189.3 2002-12-11
DE20219189U DE20219189U1 (de) 2002-12-11 2002-12-11 Bohranordnung

Publications (1)

Publication Number Publication Date
WO2004052590A1 true WO2004052590A1 (fr) 2004-06-24

Family

ID=7977861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/007539 Ceased WO2004052590A1 (fr) 2002-12-11 2003-07-11 Systeme de perçage

Country Status (3)

Country Link
AU (1) AU2003257453A1 (fr)
DE (1) DE20219189U1 (fr)
WO (1) WO2004052590A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103659358A (zh) * 2013-11-29 2014-03-26 成都斯锐特钨钢刀具有限公司 对异形部件的钻孔夹具
US9884371B2 (en) * 2015-11-16 2018-02-06 The Boeing Company Multi-step drilling apparatus and methods utilizing air flow sensing control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ594685A (en) * 2011-08-19 2014-05-30 Eigen Systems Ltd Above plate coolant containment and recovery system
CN112935349B (zh) * 2019-12-10 2022-12-09 中航贵州飞机有限责任公司 教练机蒙皮加工精准引孔方法
CN112171320A (zh) * 2020-09-27 2021-01-05 广州市人则众汽车用品有限公司 一种用于汽车配件领域的管材加工辅助装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454372A (en) * 1946-06-06 1948-11-23 Billeter Henry Robert Drill and drill jig bushing carrier attachment
US4662556A (en) * 1983-10-21 1987-05-05 Atlas Copco Aktiebolag Device for assembling by riveting two or more sections of a structure
US5088171A (en) * 1990-07-23 1992-02-18 Fuji Jukogyo Kabushiki Kaisha Assembly robot with drilling unit
US5560408A (en) * 1995-07-25 1996-10-01 Difranco; Charles Shelf pin boring guide
US6088897A (en) * 1998-11-24 2000-07-18 The Boeing Company Bucking bar end-effector for upsetting a rivet
US6382889B1 (en) * 2001-02-12 2002-05-07 The Boeing Company Portable multi-axis machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3222037A1 (de) 1982-06-11 1984-04-12 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Vorrichtung zum bohren und / oder senken von werkstuecken

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454372A (en) * 1946-06-06 1948-11-23 Billeter Henry Robert Drill and drill jig bushing carrier attachment
US4662556A (en) * 1983-10-21 1987-05-05 Atlas Copco Aktiebolag Device for assembling by riveting two or more sections of a structure
US5088171A (en) * 1990-07-23 1992-02-18 Fuji Jukogyo Kabushiki Kaisha Assembly robot with drilling unit
US5560408A (en) * 1995-07-25 1996-10-01 Difranco; Charles Shelf pin boring guide
US6088897A (en) * 1998-11-24 2000-07-18 The Boeing Company Bucking bar end-effector for upsetting a rivet
US6382889B1 (en) * 2001-02-12 2002-05-07 The Boeing Company Portable multi-axis machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103659358A (zh) * 2013-11-29 2014-03-26 成都斯锐特钨钢刀具有限公司 对异形部件的钻孔夹具
US9884371B2 (en) * 2015-11-16 2018-02-06 The Boeing Company Multi-step drilling apparatus and methods utilizing air flow sensing control

Also Published As

Publication number Publication date
DE20219189U1 (de) 2003-02-27
AU2003257453A1 (en) 2004-06-30

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