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WO2005042201A1 - Procede et dispositif pour le transport d'un fil-electrode de soudage - Google Patents

Procede et dispositif pour le transport d'un fil-electrode de soudage Download PDF

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Publication number
WO2005042201A1
WO2005042201A1 PCT/AT2004/000367 AT2004000367W WO2005042201A1 WO 2005042201 A1 WO2005042201 A1 WO 2005042201A1 AT 2004000367 W AT2004000367 W AT 2004000367W WO 2005042201 A1 WO2005042201 A1 WO 2005042201A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
wire
drive
auxiliary drive
conveying
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/AT2004/000367
Other languages
German (de)
English (en)
Other versions
WO2005042201A8 (fr
Inventor
Josef Artelsmair
Christian Stumpfl
Manfred SCHÖRGHUBER
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.)
Fronius International GmbH
Original Assignee
Fronius International 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 Fronius International GmbH filed Critical Fronius International GmbH
Priority to DE212004000045U priority Critical patent/DE212004000045U1/de
Publication of WO2005042201A1 publication Critical patent/WO2005042201A1/fr
Publication of WO2005042201A8 publication Critical patent/WO2005042201A8/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
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
    • B23K9/1336—Driving means

Definitions

  • the invention relates to a method for conveying welding wire from a wire supply by means of an auxiliary drive through a hose package to a main drive preferably arranged in the welding torch, the welding wire being conveyed by the auxiliary drive in the direction of the welding torch with a constant conveying force.
  • the invention relates to a welding device with a welding device, a welding torch connected via a hose package, and a wire supply for a welding wire, an auxiliary drive for conveying the welding wire through the hose package to a main drive preferably arranged in the welding torch being arranged in the welding device, the auxiliary drive for Conveying the welding wire is designed with a constant conveying force.
  • the invention is particularly designed for MIG (metal inert gas) / MAG (metal active gas) welding processes.
  • the wire conveying comes a great deal Meaning too.
  • two wire feeds are preferably used, such as in a push-pull system, one wire feed, in particular an auxiliary drive, being arranged in the welding device and another wire feed, in particular a main drive, being arranged in the welding torch. Due to the necessary different wire speeds and conveying directions of the welding wire, the problem with the current wire conveyor systems is that the response behavior of the welding wire conveyor is very sluggish and therefore no optimal welding results can be achieved.
  • DE 35 42 314 C2 discloses a transport device for the welding wire feed on welding devices, in which the welding wire is conveyed from a storage container with the aid of at least two drives, the main drive determining the feed near the welding nozzle and a slip-loaded auxiliary drive near the Storage container is arranged.
  • the drives are regulated to a constant speed and set to different conveying speeds.
  • the respective auxiliary drive has a planetary roller gear with adjustable, spring-mounted rollers that act on the welding wire with slippage.
  • the auxiliary drives have a ten to forty percent higher conveying speed than the main drive.
  • the welding wire is only conveyed in one direction.
  • the disadvantage here is that the higher conveying speed of the auxiliary drive compared to the main drive results in high slippage and thus increased wire wear.
  • DE 197 32 379 C2 discloses a device for conveying welding wire from a wire supply to a welding device, with a main drive and at least one auxiliary drive, which has a drive motor and one or more drive elements acting on the welding wire, with the wire feed fluctuations in force occurring between the main and auxiliary drive are compensated for.
  • the fluctuations in force within the auxiliary drive are compensated for by means of an elastically deformable element which is arranged between the drive motor and the drive element which drives the welding wire without slippage.
  • the disadvantage here is that the device is not designed for a reversing movement, that is to say a forward or backward movement, but rather only the welding wire is made available to the drive in the welding torch in a force-compensated manner.
  • the reversing movement that is to say the forward and backward movement, is carried out by the wire feed arranged in the welding torch, whereas the auxiliary drive arranged in the welding device only executes a forward movement.
  • the disadvantage here is that a wire buffer is required between the main and auxiliary drive for the force-free provision of the welding wire, in particular in so-called push-pull systems in which the welding wire is conveyed in both directions. Furthermore, it is not described how the control or regulation of the auxiliary drive works.
  • WO 01/38034 AI of the applicant relates to a welding wire conveyor device with a main drive and an auxiliary drive, which has a sensor arranged after the auxiliary drive for slip-free conveying of the welding wire, which sensor detects the lateral deflection of the welding wire.
  • a method and a welding device of the kind described is from the document Cobramatic Aluminum Welding Made Easy - A Complete Line of Push-Pull GMA Welding Equipment (retrieved from http: //www.mkprod. Com / PDF_Files / Literature / Cobramatic% 202003_IndPgs .pdf ) is known, the auxiliary drive for conveying the welding wire being designed with constant torque. A reversing movement of the welding wire is not provided for in these welding torches.
  • the object of the present invention is therefore in Creation of an above-mentioned method for controlling and / or regulating a welding system and an above-mentioned welding device, by means of which a dynamic movement of the welding wire is made possible in both directions and the control and regulation effort of the welding system is minimized.
  • the object is achieved in that only the main drive is designed for a reversing movement of the welding wire, and that the welding wire is conveyed by the auxiliary drive with a predefined conveying force and different conveying speed, the conveying force being defined in such a way that the frictional losses of the Welding wire in the hose package, the welding wire is provided to the main drive essentially without force.
  • the control and / or regulating effort of the auxiliary drive and the main drive is considerably simplified since the drives do not have to be synchronized with one another at the same speed. Only the main drive has to be regulated, whereas a simple control is sufficient for the auxiliary drive.
  • Another advantage is that only small shear forces act on the welding wire and the tensile forces, which are mainly responsible for wire core wear, are minimized or eliminated.
  • the service life of the welding system according to the invention is thus increased. Because the welding wire is conveyed by the auxiliary drive with a predefined conveying force and different conveying speed, and the welding wire is made available to the main drive essentially without force, it can be achieved that the welding wire can be conveyed back more easily when the main drive moves backward with the conveying force of the auxiliary drive minimized or the welding wire can be pushed through the auxiliary drive.
  • a measure according to claim 2 is also advantageous, since it reduces the conveying problems, such as the frictional influences, when conveying the welding wire from the wire supply, and the auxiliary drive is therefore solely responsible for conveying the welding wire into the hose package.
  • simple control of the auxiliary drive can be used, since a complete relief of the auxiliary drive is made possible by the pull-off drive. The pulling drive thus takes over the task of accelerating and overcoming the braking forces of the wire supply.
  • the measure according to claim 7 is also advantageous, since it enables automatic threading, for example in the case of longer hose packages.
  • the object of the invention is also achieved by an above-mentioned welding device, the main drive for conveying the welding wire being designed in a reversing movement and a device for receiving excess welding wire in the event of a reversing conveying movement of the welding wire and the auxiliary drive for conveying the welding wire with a predefined conveying force, by means of which the friction losses of the welding wire in the hose package can be compensated, and a control for the auxiliary drive for conveying the welding wire at different conveying speeds is provided, so that the welding wire is made available to the main drive essentially without force.
  • Figure 1 is a schematic representation of a welding device.
  • FIG. 2 shows a schematic illustration of a welding device according to the invention
  • FIG. 3 shows a schematic illustration of a further exemplary embodiment of the welding system according to the invention.
  • Fig. 4 is a schematic representation of the auxiliary drive
  • Fig. 5 is a schematic representation of the wire buffer memory according to the invention.
  • Fig. 1 is a welding device 1 or a welding system for various processes or procedures, such as MIG / MAG welding or TIG / TIG welding or electrode welding processes, double wire / tandem welding processes, plasma or soldering processes etc. are shown.
  • the welding device 1 comprises a current source 2 with a power unit 3, a control device 4 and a switchover element 5 assigned to the power unit 3 or the control device 4.
  • the switchover element 5 or the control device 4 is connected to a control valve 6, which is connected in a supply line 7 for a gas 8, in particular a protective gas, such as C0 2 , helium or argon and the like. , is arranged between a gas reservoir 9 and a welding torch 10 or a torch.
  • a wire feeder 11 which is common for MIG / MAG welding, can also be controlled via the control device 4, an additional material or a welding wire 13 from a supply drum 14 or a wire reel in the area of the welding torch via a supply line 12 10 is supplied.
  • the wire feed device 11 as is known from the prior art, to be integrated in the welding device 1, in particular in the basic housing, and not as an additional device, as shown in FIG. 1. It is also possible for the wire feed device 11 to feed the welding wire 13 or the filler metal to the process point outside the welding torch 10, with a non-melting electrode preferably being arranged in the welding torch 10, as is customary in TIG / TIG welding.
  • the current for establishing an arc 15, in particular a working arc, between the electrode and a workpiece 16 is fed via a welding line 17 from the power unit 3 of the current source 2 to the torch 10, in particular the electrode, the workpiece 16 to be welded, which consists of several Share is formed via another welding line
  • a circuit can be set up for a process via the arc 15 or the plasma beam formed.
  • a cooling circuit can be used to cool the welding torch 10
  • the welding torch 10 with the interposition of a flow monitor 20 with a liquid container, in particular a water container 21, are connected, whereby when the welding torch 10 is started the cooling circuit 19, in particular a liquid pump used for the liquid arranged in the water container 21, is started and thus cooling of the welding torch 10 can be effected.
  • the welding device 1 also has an input and / or output device 22, by means of which the most varied welding parameters, operating modes or welding programs of the welding device 1 can be set or called up.
  • the welding parameters, operating modes or welding programs set via the input and / or output device 22 are forwarded to the control device 4, from which the individual components of the welding system or the welding device 1 are then controlled or corresponding setpoints for the regulation or control are specified.
  • the welding torch 10 is connected to the welding device via a hose package 23 1 or the welding system.
  • the individual lines from the welding device 1 to the welding torch 10 are arranged in the hose package 23.
  • the hose package 23 is connected to the welding torch 10 via a coupling device 24, whereas the individual lines in the hose package 23 are connected to the individual contacts of the welding device 1 via connection sockets or plug connections. So that a corresponding strain relief of the hose package 23 is ensured, the hose package 23 is connected via a strain relief device 25 to a housing 26, in particular to the base housing of the welding device 1.
  • the coupling device 24 can also be used for the connection to the welding device 1.
  • the welding torch 10 can be designed as an air-cooled welding torch 10.
  • FIGS. 2 to 5 show exemplary embodiments for forming a welding system 27 with a multiple drive system for a MIG / MAG welding process.
  • a wire supply 28 and an auxiliary drive 29 are arranged in the welding device 1.
  • the auxiliary drive 29 unwinds a welding wire 13 from the wire supply 28 and conveys it constantly in the direction of a main drive 30 which is preferably arranged in a welding torch 10.
  • the welding wire 13 is thereby guided by a hose package 23 which is arranged between the welding device 1 and a welding torch 10, promoted.
  • a wire guide hose 31 In the hose package 23 there is a wire guide hose 31, and a wire core 32 is arranged therein. The welding wire 13 is guided in the wire core 32.
  • the main drive 30, which is preferably arranged in the welding torch 10 after the hose package 23 or the wire core 32, can perform a reversing movement, that is to say a forward or backward movement, in order to achieve a stable short-circuit welding process. Chen and thus to guarantee a spatter-free welding.
  • the welding wire 13 is moved forwards until it touches the workpiece 16 and, after the short circuit has been formed, is pulled back again in order to generate an arc 15 again.
  • the auxiliary drive 29 in the welding device only executes a forward movement.
  • the auxiliary drive 29 conveys the welding wire 13 in the direction of the welding torch 10 with a constant conveying force, in particular with a predetermined conveying force, and with a different conveying speed, and the main drive 30 carries out the reversing movement, that is to say a forward and backward movement of the welding wire 13.
  • the conveying force is adjusted so that the welding wire 13 is made available to the main drive 30 with almost no force due to the friction losses in the hose package 23.
  • the auxiliary drive 29 can convey the welding wire 13 into the hose package 23 even with a pulsating moment or a pulsating conveying force.
  • the auxiliary drive 29 can be clocked to the reversing movement of the main drive 30, as a result of which the excess welding wire can be compensated for in the case of a reversing movement.
  • This type of control of the auxiliary drive 29 is advantageous in that a hose package 23 with a short length is used, as a result of which it is not possible to take up as much excess welding wire 13.
  • FIG. 3 shows a further exemplary embodiment of the welding system 27 according to the invention, a pulling drive 37 being arranged after the wire supply 28, as a result of which the pulling drive 37 conveys the welding wire 13 from the wire supply 28 and makes the welding wire 13 available to the auxiliary drive 30 without force.
  • the pull-off drive 37 and the auxiliary drive 29 are decoupled by a wire buffer memory 38 arranged between them, that is to say that the further pull-off drive 37 conveys the welding wire 13 from the wire supply 28 and thus the acceleration and braking forces of the wire supply 28 alone are taken over, so that the welding wire 13 is made available by the wire buffer store 38 to the auxiliary drive 29 without force.
  • the wire buffer memory 38 has the task of making a sufficient amount of welding wire 13 available to the auxiliary drive 30, as well as to catch up the overrun of the wire supply 28.
  • the forces for conveying or withdrawing the welding wire 13 from the wire reel or the wire supply 28 are thus kept away from the auxiliary drive 29, so that there are no tensile and / or pushing forces between the drives, in particular between the pulling drive 37 and auxiliary drive 29 and between the auxiliary drive 29 and main drive 30.
  • a sensor 39 for detecting the fill level can be arranged in the wire buffer memory 38.
  • This sensor 39 can be designed, for example, as a displacement sensor, angle sensor or the like.
  • the conveying speed of the pull-off drive 37 is regulated depending on the fill level of the wire buffer memory 38 recorded by the sensor 39. It is thereby achieved that the wire buffer memory 38 always has a certain fill level or a certain amount of memory, that is to say it is never completely full or empty.
  • FIG. 4 shows a schematic illustration of the auxiliary drive 29, in a simplified schematic illustration, which can be used for such a wire conveyor system.
  • a hysteresis clutch 40 is connected to the auxiliary drive 29.
  • the auxiliary drive 29 can be operated at a constant speed, as described in FIG. 2, a constant torque and thus a constant delivery force for the welding wire 13 being achieved by the hysteresis clutch 40.
  • a continuous conveying of the welding wire 13 in the direction of the main drive 30 arranged in the welding torch 10 is thus ensured without a high regulation or control effort being necessary.
  • the auxiliary drive 29 and / or the main drive 30 are preferably formed by a synchronous motor.
  • the auxiliary drive 29 and / or the main drive 30 is preferably controlled such that the motor associated with the auxiliary drive 29 and / or the main drive 30 is fed by a constant motor current, thereby generating a constant torque and, as a result, a constant delivery force.
  • FIG. 5 An exemplary embodiment of the hose package 23 with an integrated wire buffer memory of the welding system 27 according to the invention is shown schematically in FIG. 5.
  • a further wire buffer store 41 can be arranged, this being integrated in the hose package 23.
  • the further wire buffer memory 41 can be formed by a wire guide hose 31, the inner diameter 33 of which is, for example, at least 1.5 times larger than the outer diameter 34 of the wire core 32.
  • the wire buffer memory 41 can also be formed in that the wire core 32 has an inner diameter 35 which is at least 1 , 5 times larger than the outer diameter 36 of the welding wire 13. This construction of the wire buffer store 41 allows more welding wire 13 to be accommodated in the hose package 23.
  • a changeover to another conveying force can be carried out for threading the welding wire 13.
  • the control device 4 of the welding device 1 can initiate an automatic increase in the conveying force in order to ensure that the welding wire 13 can be pushed through from the auxiliary drive 29 to the main drive 30.
  • the main drive 30, which is preferably arranged in the welding torch 10 is designed as a highly dynamic direct drive, in which a drive roller is coupled without a gear to an electric motor. This enables a very quick reversal of direction in wire feeding.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

L'invention concerne un procédé pour le transport d'un fil-électrode de soudage (13) d'une réserve de fil (28), au moyen d'un dispositif d'entraînement auxiliaire (29), à travers un ensemble tuyau flexible (23), jusqu'à un dispositif d'entraînement principal (30) qui est disposé, de préférence, dans le chalumeau de soudage (10). Le fil-électrode de soudage (13) étant transporté par le dispositif d'entraînement auxiliaire (29) en direction du chalumeau de soudage (10) avec une force de transport constante. L'invention concerne également un dispositif de soudage conçu pour la mise en oeuvre de ce procédé. Pour l'obtention d'un transport hautement dynamique du fil-électrode de soudage dans les deux sens et réduire la complexité de la commande et de la régulation, il est proposé qu'exclusivement le dispositif d'entraînement principal (30) soit conçu pour provoquer un déplacement pouvant être inversé du fil-électrode de soudage (13) et que ce dernier soit transporté par le dispositif d'entraînement auxiliaire (29) avec une force de transport prédéfinie et à une vitesse de transport différente, ladite force de transport étant définie de telle sorte que, en raison des pertes dues à son frottement dans l'ensemble tuyau flexible (23), le fil-électrode de soudage arrive au dispositif d'entraînement principal (30) sensiblement sans force.
PCT/AT2004/000367 2003-10-23 2004-10-22 Procede et dispositif pour le transport d'un fil-electrode de soudage Ceased WO2005042201A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212004000045U DE212004000045U1 (de) 2003-10-23 2004-10-22 Schweißvorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1686/2003 2003-10-23
AT16862003A AT500755B8 (de) 2003-10-23 2003-10-23 Drahtförderung mit konstantem moment

Publications (2)

Publication Number Publication Date
WO2005042201A1 true WO2005042201A1 (fr) 2005-05-12
WO2005042201A8 WO2005042201A8 (fr) 2005-07-28

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PCT/AT2004/000367 Ceased WO2005042201A1 (fr) 2003-10-23 2004-10-22 Procede et dispositif pour le transport d'un fil-electrode de soudage

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AT (1) AT500755B8 (fr)
DE (1) DE212004000045U1 (fr)
WO (1) WO2005042201A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2732900A1 (fr) * 2012-11-20 2014-05-21 Nordseetaucher GmbH Soudage à l'arc hyperbare
JP2015066560A (ja) * 2013-09-27 2015-04-13 株式会社ダイヘン ワイヤ送給装置
EP3088118A3 (fr) * 2015-04-06 2017-01-25 AWDS Technologies SRL Système d'alimentation en fil et procédé de commande d'alimentation de fil de soudage
US9975728B2 (en) 2015-09-10 2018-05-22 Sidergas Spa Wire container lid, wire container and wire feeding system
US10010962B1 (en) 2014-09-09 2018-07-03 Awds Technologies Srl Module and system for controlling and recording welding data, and welding wire feeder
CN109648176A (zh) * 2019-01-30 2019-04-19 杭州凯尔达机器人科技股份有限公司 用于焊丝的缓冲装置及焊接系统和焊接机器人
US10343231B2 (en) 2014-05-28 2019-07-09 Awds Technologies Srl Wire feeding system
WO2020216859A1 (fr) * 2019-04-24 2020-10-29 S/P/A Welding Systems Gmbh Dispositif de soudage et procédé pour faire fonctionner un dispositif de soudage
US11174121B2 (en) 2020-01-20 2021-11-16 Awds Technologies Srl Device for imparting a torsional force onto a wire
US11278981B2 (en) 2020-01-20 2022-03-22 Awds Technologies Srl Device for imparting a torsional force onto a wire

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000064620A1 (fr) * 1999-04-26 2000-11-02 Fronius Schweissmaschinen Produktion Gmbh & Co. Kg Procede de soudage et dispositif de soudage pour ce procede
WO2003011509A1 (fr) * 2001-07-30 2003-02-13 Matsushita Electric Industrial Co., Ltd. Devidoir a fil de soudure

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
DE19738785C2 (de) * 1997-09-04 2001-12-13 Leipold & Co Gmbh Vorrichtung zum Lichtbogenschweißen mit abschmelzender Elektrode
AT411032B (de) * 1999-11-19 2003-09-25 Fronius Schweissmasch Prod Verfahren und vorrichtung zum überwachen einer förderkraft
US7165707B2 (en) * 2002-07-23 2007-01-23 Illinois Tool Works Inc. Method and apparatus for feeding wire to a welding arc

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000064620A1 (fr) * 1999-04-26 2000-11-02 Fronius Schweissmaschinen Produktion Gmbh & Co. Kg Procede de soudage et dispositif de soudage pour ce procede
WO2003011509A1 (fr) * 2001-07-30 2003-02-13 Matsushita Electric Industrial Co., Ltd. Devidoir a fil de soudure
EP1413382A1 (fr) * 2001-07-30 2004-04-28 Matsushita Electric Industrial Co., Ltd. Devidoir a fil de soudure

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2732900A1 (fr) * 2012-11-20 2014-05-21 Nordseetaucher GmbH Soudage à l'arc hyperbare
JP2015066560A (ja) * 2013-09-27 2015-04-13 株式会社ダイヘン ワイヤ送給装置
US10343231B2 (en) 2014-05-28 2019-07-09 Awds Technologies Srl Wire feeding system
US10010962B1 (en) 2014-09-09 2018-07-03 Awds Technologies Srl Module and system for controlling and recording welding data, and welding wire feeder
EP3088118A3 (fr) * 2015-04-06 2017-01-25 AWDS Technologies SRL Système d'alimentation en fil et procédé de commande d'alimentation de fil de soudage
US10350696B2 (en) 2015-04-06 2019-07-16 Awds Technologies Srl Wire feed system and method of controlling feed of welding wire
US9975728B2 (en) 2015-09-10 2018-05-22 Sidergas Spa Wire container lid, wire container and wire feeding system
CN109648176A (zh) * 2019-01-30 2019-04-19 杭州凯尔达机器人科技股份有限公司 用于焊丝的缓冲装置及焊接系统和焊接机器人
WO2020216859A1 (fr) * 2019-04-24 2020-10-29 S/P/A Welding Systems Gmbh Dispositif de soudage et procédé pour faire fonctionner un dispositif de soudage
CN113874150A (zh) * 2019-04-24 2021-12-31 亚历山大·宾策尔焊接技术两合公司 焊接装置和用于运行焊接装置的方法
US12434320B2 (en) 2019-04-24 2025-10-07 Alexander Binzel Schweisstechnik Gmbh & Co. Kg Welding device and method for operating a welding device
US11174121B2 (en) 2020-01-20 2021-11-16 Awds Technologies Srl Device for imparting a torsional force onto a wire
US11278981B2 (en) 2020-01-20 2022-03-22 Awds Technologies Srl Device for imparting a torsional force onto a wire

Also Published As

Publication number Publication date
DE212004000045U1 (de) 2006-06-08
WO2005042201A8 (fr) 2005-07-28
AT500755B8 (de) 2007-02-15
AT500755B1 (de) 2006-07-15
AT500755A1 (de) 2006-03-15

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