EP0340322B1 - Wire unwinding device - Google Patents

Wire unwinding device Download PDF

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Publication number
EP0340322B1
EP0340322B1 EP88107043A EP88107043A EP0340322B1 EP 0340322 B1 EP0340322 B1 EP 0340322B1 EP 88107043 A EP88107043 A EP 88107043A EP 88107043 A EP88107043 A EP 88107043A EP 0340322 B1 EP0340322 B1 EP 0340322B1
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EP
European Patent Office
Prior art keywords
wire
unwinding device
deflection roller
roller
shaft
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
EP88107043A
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German (de)
French (fr)
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EP0340322A1 (en
Inventor
Heinrich Groos
Hans Hermanni
Jürgen Gerlach
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Berkenhoff and Co KG
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Berkenhoff and Co KG
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Filing date
Publication date
Application filed by Berkenhoff and Co KG filed Critical Berkenhoff and Co KG
Priority to DE8888107043T priority Critical patent/DE3876789D1/en
Priority to AT88107043T priority patent/ATE83467T1/en
Priority to EP88107043A priority patent/EP0340322B1/en
Priority to ES198888107043T priority patent/ES2036233T3/en
Priority to JP1109240A priority patent/JPH0266069A/en
Publication of EP0340322A1 publication Critical patent/EP0340322A1/en
Priority to US07/714,884 priority patent/US5248104A/en
Application granted granted Critical
Publication of EP0340322B1 publication Critical patent/EP0340322B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/36—Floating elements compensating for irregularities in supply or take-up of material

Definitions

  • the invention relates to a wire unwinding device for wire EDM machines with a shaft for receiving a wire spool with a fixed, rotatably mounted on the housing deflection roller, a position-changing deflection roller which is rotatably arranged in a region between the wire spool and the fixed deflection roller. so that the wire to be unwound from the wire spool is passed in the direction of curvature predetermined by the wire spool over the stationary deflection roller and subsequently over the position-changing deflection roller.
  • Wire unwinding devices are known from the prior art, in which a wire spool on which wire is wound. is rotatably mounted so that the wire can be removed.
  • a wire unwinding device it is necessary that the unwinding of the wire is carried out in a controlled manner, a predetermined wire tension in particular having to be ensured in order to avoid loop formation or wire tears.
  • the known wire unwinding devices also have the disadvantage that it is not possible to unwind large wire spools in a reliable manner.
  • known wire unwinding devices does not guarantee that a change in the mechanical properties of the wire is avoided.
  • a wire winding machine which is used to wind wires on coils.
  • This known device has a stationary deflection roller which is rotatably mounted on the housing.
  • a position-changing deflection roller is arranged in an area between the wire spool and the stationary deflection roller, the wire being guided over the rollers in such a way that its predetermined direction of curvature is maintained.
  • such a device is not suitable for use in EDM machines for electrical as well as drive reasons.
  • the invention has for its object to provide a wire unwinding device for wire EDM machines, which can be equipped with very large wire coils with a simple structure and reliable operation and in which an influence on the mechanical properties or the strength properties of the wire is avoided and that for the feed of the wire to the EDM machines is suitable in all operating conditions.
  • the object is achieved in that the axes of the stationary and movable deflection rollers and that of the unwinding device are parallel to one another, that the deflection rollers and all components that come into contact with the wire are designed or arranged in an electrically insulating manner and that the motor driving the shaft of the unwinding device is reversibly operable.
  • the wire unwinding device is characterized by a number of considerable advantages.
  • the arrangement of the deflecting rollers and the way of guiding the wire according to the invention ensures that the wire is always kept under sufficient tension so that, on the one hand, the wire is unwound too quickly from the wire spool and thus a loop formation is avoided, and on the other hand a wire break due to excessive loads is excluded. Since the wire from the wire spool is first passed over the stationary deflection roller and then over the position-changing deflection roller, it is possible to always ensure sufficient tension of the wire by displacing the position-changing deflection roller, that is to say by lateral displacement or pivoting, this being independent on the size of the wire spool used or the amount of wire located on it.
  • the arrangement of the wire spool and the deflecting rollers also makes it possible to unwind the wire from the wire spool and to forward it to a downstream processing or processing station in such a way that the wire is guided around the deflecting rollers exclusively in the direction of curvature specified by the wire spool. It is thus avoided that the wire is subjected to alternate bends during the unwinding process.
  • This proves to be particularly advantageous when the wire unwinding device according to the invention is used in connection with an eroding machine, for example for EDM cutting, since the stiffness or strength of the wire, which is decisive for the eroding behavior, is not influenced.
  • the wire thus remains essentially in the direction of curvature predetermined by the winding on the wire spool, it is bent as straight as possible when diverting around the deflecting rollers, but is not subjected to alternating bends.
  • the deflection rollers can be selected to be very large in diameter, for example with a diameter which corresponds to the mean diameter of the wire spool.
  • the wire unwinding device according to the invention thus enables the wire to be unwound extremely gently.
  • wire unwinding device Another essential advantage of the wire unwinding device according to the invention is that very large wire spools can be processed, which enable the unwinding device to be operated essentially unattended over a long period of time. This proves to be particularly advantageous if a downstream machine, for example an eroding machine, is to be operated unattended during the night shift or over the weekend.
  • the inventive routing and storage of the wire ensures that the wire unwinding device can not malfunction.
  • the position-changing deflection roller is preloaded in a translation direction in order to apply a pretensioning force to the wire.
  • the stationary deflection roller is designed as a double roller and the position-alterable deflection roller is arranged below the stationary deflection roller so that the wire from the wire spool over one part of the double roller, over the position-changeable deflection roller and over the other part the dual role.
  • the wire is thus moved in a loop path without interchangeable bends being applied to the wire.
  • a wire guide which preferably comprises two rotatably mounted rollers, is advantageously provided between the wire spool and the deflection roller.
  • the wire can be guided after the stationary deflection roller via a height-adjustable guide roller which can be adapted to a downstream wire processing device.
  • a height-adjustable guide roller which can be adapted to a downstream wire processing device.
  • Another, particularly favorable embodiment of the wire unwinding device has a cantilevered one Shaft on which the wire spool is mounted by means of cones which can be inserted laterally into a central recess in the wire reel and are mounted on the shaft.
  • the wire reel is pushed onto the shaft in that the wire spool, the central recess of which is larger than the diameter of the shaft, is placed on the shaft and moved into the unwinding position.
  • the cones it is possible to center the wire coil relative to the shaft.
  • the wire spool is raised so that it no longer lies on the floor, for example. This measure makes it possible to dispense with a height-adjustable unwinding shaft as well as a height-adjustable transport device for the wire spool.
  • a transport carriage which can be displaced in the longitudinal direction of the shaft, for accommodating the wire coil is arranged below the shaft and preferably has two rotatable support supports which are parallel to one another.
  • roll includes.
  • the wire spool, the deflection rollers and all components that come into contact with the wire are designed or arranged in an electrically insulating manner, so that electrical currents, which are applied to the wire during EDM cutting, for example, cannot be conducted into the wire unwinding device.
  • the shaft and thus the wire reel mounted on it by means of a motor steplessly driven, the drive only takes place in one direction when unwinding.
  • Reversing spooling proves to be advantageous, for example, when a larger amount of wire is to be rewound onto the wire spool when the device downstream of the wire unwinding device is changed. Since the wire is also passed over the position-changing deflection roller during rewinding, it is ensured that the rewound wire is wound on the wire reel with sufficient tension.
  • the rewinding process can also be used to advantage if a device downstream of the wire unwinding device has only a low winding capacity for wire or if the wire is to be used several times.
  • the wire unwinding device comprises a housing 4, indicated only schematically, in which a motor 14 is mounted, which drives a shaft (not shown in FIG. 1) via a gear 15, on which a wire spool 2 can be stored.
  • the storage of the wire coil 2 will be described below with reference to FIGS. 2 and 3 in detail.
  • FIG. 1 shows a transport carriage 12 arranged below the wire spool 2, which has two mutually parallel, rotatable support rollers 13.
  • the support rollers 13 are slidably mounted in the housing 4 along their axis.
  • the carriage 12 is connected to a ramp 16 which can be moved together with the carriage 12.
  • the carriage 12 together with the ramp 16 is laterally displaced until the wire spool 2 is pulled off the floating shaft (not shown). It is then possible in a simple manner to roll the wire spool away from the support rollers 13 via the ramp 16 and to replace it with another wire spool in an analogous manner.
  • the wire spool 2 comprises in the usual way a plurality of layers of wire 6, which is passed through between two rotatable rollers 8a, 8b of a wire guide 9 when the wire spool 2 is being unwound.
  • the wire guide 9 ensures that the wire, despite the back and forth movement forced by the arrangement on the wire spool 2, is always fed in a safe manner to a subsequently arranged stationary deflection roller 3.
  • a position-adjustable deflection roller 5 is arranged below the stationary deflection roller 3 .
  • the wire is passed over a second fixed deflection roller 3 ', which, as shown schematically in Fig. 1, is adjustable in height and / or pivotable in a certain range.
  • the wire unwound from the wire spool 2 is first passed over a position-changing deflection roller which, as will be described below, can be laterally displaced, for example by means of a carriage, in order to always apply sufficient tension to the wire before that of a non-position-changeable, fixed deflection roller (in which in Fig. 1 shown embodiment of the guide roller 3 ') is supplied.
  • a position-changing deflection roller 5 the stationary deflection roller 3 can be dispensed with.
  • the arrangement of the deflection rollers must be selected so that the direction of curvature of the wire, which is predetermined by the wire coil 2, is not changed, so that alternate bends in the wire are avoided.
  • FIG. 2 shows a schematic side view of a further exemplary embodiment of the wire unwinding device according to the invention. It can be clearly seen that the wire spool 2 is mounted on a floating shaft 1.
  • the shaft 1 as shown schematically, is operatively connected via the gear 15 by means of the motor 14 and can be driven by it.
  • the motor 14 is controlled via a control device, not shown in detail, which is arranged in a control cabinet 19.
  • the wire coil 2 has a central recess which is larger in diameter than the outer diameter of the shaft 1.
  • a cone 11a is fastened to the shaft.
  • Another cone 11b can be pushed onto the shaft 1 after the wire coil 2 has been arranged on the shaft 1.
  • the cone 11b is pressed against the wire spool 2 via a nut 20, which can be screwed onto a thread of the shaft 1, and inserted into the central recess of the wire spool 2.
  • a nut 20 which can be screwed onto a thread of the shaft 1, and inserted into the central recess of the wire spool 2.
  • the wire removed from the wire spool 2 is first passed over a stationary deflection roller 3, then over the position-adjustable deflection roller 5 and then over the further stationary deflection roller 3 '.
  • the position-changing deflection roller 5 is mounted on a carriage 7 which is guided on one or more vertical rails 21 and can be moved in the vertical direction.
  • a prestressing force is applied to the wire 6 by the position-changing deflection roller 5.
  • the magnitude of the prestressing force can be applied to the carriage 7 by an elastic element, by the influence of gravity or, as shown in FIG. 2, by a drive device 22.
  • the drive device 22 is operationally connected to a motor 23 and is designed, for example, in the form of a revolving chain which is guided via chain wheels 24.
  • FIG. 3 shows a schematic, rear view of the exemplary embodiment shown in FIG. 2. From Fig. 3 it can be seen in particular that the wire 6 is guided by the wire spool 2 over the deflection rollers 3, 5, 3 'so that no change in the previously existing direction of curvature occurs.
  • the deflection roller 3 ' which, unlike the position-adjustable deflection roller 5, which the latter is constantly in motion during operation in order to apply a pretension to the wire, is stationary once the adjustment has been carried out, guides the wire to an adjustable guide roller 10, which in particular adjustable in height is mounted on the housing 4.
  • the guide roller 10 makes it possible to set the wire in its direction of flow to a downstream processing system in such a way that the bending direction of the wire already described can be maintained.
  • two fixed deflection rollers 3, 3 ' were used, which are arranged separately from one another.
  • the wire unwinding device according to the invention can be used to supply a wide variety of machines with wire, it can be advantageous to mount the housing 4 on lockable rollers. Furthermore, it can prove to be advantageous to close the area of the housing in which the wire spool 2 and the deflection rollers are arranged by means of a door to the environment in order to avoid contamination and / or impairment of the unwinding process.

Landscapes

  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

The invention relates to a wire unwinding device is which wire can be unwound, even from a very large wire reel (2), in such a way that the direction of curvature of the wire (6) is maintained and alternating bending of the wire (6) avoided. The wire is passed over a stationary deflecting roller (3), a deflecting roller (5) which is variable in position in order to apply a pretensioning force, and over a further stationary deflecting roller (3'). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Drahtabspulvorrichtung für Drahterodiermaschinen mit einer Welle zur Aufnahme einer Drahtspule mit einer ortsfesten, drehbar am Gehäuse gelagerten Umlenkrolle, einer lageveränderbaren Umlenkrolle, die drehbar in einem Bereich zwischen der Drahtspule und der ortsfesten Umlenkrolle angeordnet ist. so daß der von der Drahtspule abzuspulende Draht in der durch die Drahtspule vorgegebenen Krümmungsrichtung über die ortsfeste Umlenkrolle und nachfolgend über die lageveränderbare Umlenkrolle geleitet wird.The invention relates to a wire unwinding device for wire EDM machines with a shaft for receiving a wire spool with a fixed, rotatably mounted on the housing deflection roller, a position-changing deflection roller which is rotatably arranged in a region between the wire spool and the fixed deflection roller. so that the wire to be unwound from the wire spool is passed in the direction of curvature predetermined by the wire spool over the stationary deflection roller and subsequently over the position-changing deflection roller.

Es sind aus dem Stand der Technik Drahtabspulvorrichtungen bekannt, bei welchen eine Drahtspule, auf welcher Draht aufgewickelt ist. drehbar gelagert ist, so daß der Draht abgezogen werden kann. Bei einer Drahtabspulvorrichtung ist es erforderlich, daß das Abspulen des Drahtes in gesteuerter Weise erfolgt, wobei insbesondere eine vorgegebene Drahtspannung gewährleistet sein muß, um Schlaufenbildungen oder Drahtrisse zu vermeiden. Die bekannten Drahtabspulvorrichtungen weisen auch den Nachteil auf, daß es nicht möglich ist, große Drahtspulen in betriebssicherer Weise abzuspulen. Weiterhin ist bei bekannten Drahtabspulvorrichtungen nicht gewährleistet, daß eine Veränderung der mechanischen Eigenschaften des Drahtes vermieden wird.Wire unwinding devices are known from the prior art, in which a wire spool on which wire is wound. is rotatably mounted so that the wire can be removed. In the case of a wire unwinding device, it is necessary that the unwinding of the wire is carried out in a controlled manner, a predetermined wire tension in particular having to be ensured in order to avoid loop formation or wire tears. The known wire unwinding devices also have the disadvantage that it is not possible to unwind large wire spools in a reliable manner. Furthermore, known wire unwinding devices does not guarantee that a change in the mechanical properties of the wire is avoided.

Aus der CH-PS 385 774 ist eine Drahtwickelmaschine bekannt, die zur Aufwicklung von Drähten auf Spulen dient. Diese bekannte Vorrichtung weist eine ortsfeste Umlenkrolle auf, die drehbar am Gehäuse gelagert ist. Eine lageveränderbare Umlenkrolle ist in einem Bereich zwischen der Drahtspule und der ortsfesten Umlenkrolle angeordnet, wobei der Draht so über die Rollen geführt ist, daß seine vorgegebene Krümmungsrichtung beibehalten wird. Eine derartige Vorrichtung ist jedoch für den Einsatz bei Erodiermaschinen aus elektrischen wie auch aus Antriebsgründen nicht geeignet.From CH-PS 385 774 a wire winding machine is known which is used to wind wires on coils. This known device has a stationary deflection roller which is rotatably mounted on the housing. A position-changing deflection roller is arranged in an area between the wire spool and the stationary deflection roller, the wire being guided over the rollers in such a way that its predetermined direction of curvature is maintained. However, such a device is not suitable for use in EDM machines for electrical as well as drive reasons.

Der Erfindung liegt die Aufgabe zugrunde, eine Drahtabspulvorrichtung für Drahterodiermaschinen zu schaffen, welche bei einem einfachen Aufbau und betriebssicherer Wirkungsweise auch mit sehr großen Drahtspulen bestückt werden kann und bei der eine Beeinflussung der mechanischen Eigenschaften oder der Festigkeitseigenschaften des Drahtes vermieden wird und die für die Zuführung des Drahtes zu den Erodiermaschinen bei allen auftretenden Betriebszuständen geeignet ist.The invention has for its object to provide a wire unwinding device for wire EDM machines, which can be equipped with very large wire coils with a simple structure and reliable operation and in which an influence on the mechanical properties or the strength properties of the wire is avoided and that for the feed of the wire to the EDM machines is suitable in all operating conditions.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die Achsen der ortsfesten und beweglichen Umlenkrollen sowie die der Abspulvorrichtung parallel zueinander liegen, daß die Umlenkrollen sowie alle mit dem Draht in Berührung kommenden Bauelemente elektrisch isolierend ausgebildet oder angeordnet sind und daß der die Welle der Abspulvorrichtung antreibende Motor reversierbar betreibbar ist.According to the invention the object is achieved in that the axes of the stationary and movable deflection rollers and that of the unwinding device are parallel to one another, that the deflection rollers and all components that come into contact with the wire are designed or arranged in an electrically insulating manner and that the motor driving the shaft of the unwinding device is reversibly operable.

Die erfindungsgemäße Drahtabspulvorrichtung zeichnet sich durch eine Reihe erheblicher Vorteile aus. Durch die Anordnung der Umlenkrollen und durch die erfindungsgemäße Art der Führung des Drahtes ist sichergestellt, daß der Draht stets unter einer ausreichenden Spannung gehalten wird, so daß zum einen zu schnelles Abspulen des Drahtes von der Drahtspule und damit eine Schlaufenbildung vermieden wird und daß zum anderen ein Drahtriß durch zu starke Belastungen ausgeschlossen ist. Da der Draht von der Drahtspule zuerst über die ortsfeste Umlenkrolle und anschließend über die lageveränderbare Umlenkrolle geleitete wird, ist es möglich, durch eine Versetzung der lageveränderbaren Umlenkrolle, d. h. durch eine seitliche Verschiebung oder Verschwenkung stets eine ausreichende Spannung des Drahtes zu gewährleisten, wobei dies unabhängig von der Größe der verwendeten Drahtspule bzw. der auf dieser befindlichen Drahtmenge erfolgt. Durch die Anordnung der Drahtspule und der Umlenkrollen ist es ferner möglich, den Draht so von der Drahtspule abzuspulen und an eine nachgeordnete Bearbeitungs- oder Verarbeitungsstation weiterzuleiten, daß der Draht ausschließlich in der durch die Drahtspule vorgegebenen Krümmungsrichtung um die Umlenkrollen geleitet wird. Es wird somit vermieden, daß der Draht während des Abspulvorganges Wechselbiegungen unterworfen wird. Dies erweist sich insbesondere bei einer Verwendung der erfindungsgemäßen Drahtabspulvorrichtung in Zusammenhang mit einer Erodiermaschine, beispielsweise für das funkenerosive Schneiden, als besonders vorteilhaft, da die Steifheit bzw. Festigkeit des Drahtes, welche für das Erodierverhalten entscheidend ist, nicht beeinflußt wird. Der Draht verbleibt somit im wesentlichen in der durch die Aufwicklung auf die Drahtspule vorgegebenen Krümmungsrichtung, er wird beim Umleiten um die Umlenkrollen maximal gradlinig gebogen, jedoch nicht Wechselbiegungen unterworfen. Durch geeignete Dimensionierung der Umlenkrollen ist es zudem möglich, eine übermäßige Verbiegung des Drahtes in der Krümmungsrichtung zu vermeiden. Die Umlenkrollen können erfindungsgemäß in ihrem Durchmesser sehr groß ausgewählt werden, beispielsweise mit einem Durchmesser, welcher dem mittleren Durchmesser der Drahtspule entspricht. Die erfindungsgemäße Drahtabspulvorrichtung ermöglicht somit eine äußerst materialschonende Abspulung des Drahtes.The wire unwinding device according to the invention is characterized by a number of considerable advantages. The arrangement of the deflecting rollers and the way of guiding the wire according to the invention ensures that the wire is always kept under sufficient tension so that, on the one hand, the wire is unwound too quickly from the wire spool and thus a loop formation is avoided, and on the other hand a wire break due to excessive loads is excluded. Since the wire from the wire spool is first passed over the stationary deflection roller and then over the position-changing deflection roller, it is possible to always ensure sufficient tension of the wire by displacing the position-changing deflection roller, that is to say by lateral displacement or pivoting, this being independent on the size of the wire spool used or the amount of wire located on it. The arrangement of the wire spool and the deflecting rollers also makes it possible to unwind the wire from the wire spool and to forward it to a downstream processing or processing station in such a way that the wire is guided around the deflecting rollers exclusively in the direction of curvature specified by the wire spool. It is thus avoided that the wire is subjected to alternate bends during the unwinding process. This proves to be particularly advantageous when the wire unwinding device according to the invention is used in connection with an eroding machine, for example for EDM cutting, since the stiffness or strength of the wire, which is decisive for the eroding behavior, is not influenced. The wire thus remains essentially in the direction of curvature predetermined by the winding on the wire spool, it is bent as straight as possible when diverting around the deflecting rollers, but is not subjected to alternating bends. By suitable dimensioning of the deflection rollers, it is also possible to prevent the wire from being excessively bent Avoid direction of curvature. According to the invention, the deflection rollers can be selected to be very large in diameter, for example with a diameter which corresponds to the mean diameter of the wire spool. The wire unwinding device according to the invention thus enables the wire to be unwound extremely gently.

Ein weiterer wesentlicher Vorteil der erfindungsgemäßen Drahtabspulvorrichtung ist dadurch gegeben, daß sehr große Drahtspulen verarbeitet werden können, welche über einen langen Zeitraum hinweg einen im wesentlichen unbeaufsichtigten Betrieb der Abspulvorrichtung ermöglichen. Dies erweist sich insbesondere dann als besonders vorteilhaft, wenn eine nachgeschaltete Maschine, beispielsweise eine Erodiermaschine während der Nachtschicht oder über das Wochenende unbeaufsichtigt betrieben werden soll. Durch die erfindungsgemäße Führung und Lagerung des Drahtes ist gewährleistet, daß seitens der Drahtabspulvorrichtung keine Betriebsstörungen auftreten können.Another essential advantage of the wire unwinding device according to the invention is that very large wire spools can be processed, which enable the unwinding device to be operated essentially unattended over a long period of time. This proves to be particularly advantageous if a downstream machine, for example an eroding machine, is to be operated unattended during the night shift or over the weekend. The inventive routing and storage of the wire ensures that the wire unwinding device can not malfunction.

Eine besonders vorteilhafte Weiterbildung der erfindungsgemäßen Vorrichtung ist dadurch gegeben, daß die lageveränderbare Umlenkrolle zur Aufbringung einer Vorspannkraft auf den Draht in einer Translationsrichtung vorgespannt gelagert ist. Durch diese Maßnahme wird stets eine ausreichende Kraft auf den Draht aufgebracht, um Schwingungen oder Schleifenbildungen zu verhindern, wobei, wie bereits beschrieben, Wechselbiegungen des Drahtes vermieden werden.A particularly advantageous further development of the device according to the invention is provided in that the position-changing deflection roller is preloaded in a translation direction in order to apply a pretensioning force to the wire. With this measure, sufficient force is always applied to the wire to prevent vibrations or loops, whereby, as already described, alternate bending of the wire is avoided.

Weiterhin erweist es sich als besonders vorteilhaft, wenn die ortsfeste Umlenkrolle als Doppelrolle ausgebildet ist und die lageveränderbare Umlenkrolle unterhalb der ortsfesten Umlenkrolle so angeordnet ist, daß der Draht von der Drahtspule über den einen Teil der Doppelrolle, über die lageveränderbare Umlenkrolle und über den anderen Teil der Doppelrolle geleitet wird. Der Draht wird somit in einer Schleifenbahn bewegt, ohne daß Wechselbiegungen auf den Draht aufgebracht werden. Durch die Ausgestaltung der ortsfesten Umlenkrolle als Doppelrolle erfolgt eine zweifache Führung des Drahtes, welche zu einer erheblichen Steigerung der Betriebssicherheit führt, da der Draht sowohl bei der Zuführung zu der lageveränderbaren Umlenkrolle, als auch bei Abführung von dieser in sicherer Weise geführt ist. Dabei erweist es sich als besonders vorteilhaft, die lageveränderbare Umlenkrolle an einem vertikal bewegbaren Schlitten zu lagern, da es möglich ist, diesen Schlitten entweder mittels eines elastischen Elements oder durch Schwerkrafteinfluß von der ortsfesten Umlenkrolle weg vorzuspannen. Es wird somit erreicht, daß stets eine gleichbleibende Kraft zum Spannen des Drahtes aufgebracht wird, welche Schwankungen der Zugkraft in zuverlässiger Weise ausgleichen kann. Dabei wird sowohl vermieden, daß der Draht von den Umlenkrollen abspringt, als auch daß der Draht durch plötzliche, kurzzeitige Steigerungen der Zugkraft reißt. Es kann jedoch auch möglich sein, den Schlitten mittels einer gesteuerten Antriebseinrichtung zur Vorspannung des Drahtes zu verschieben.Furthermore, it proves to be particularly advantageous if the stationary deflection roller is designed as a double roller and the position-alterable deflection roller is arranged below the stationary deflection roller so that the wire from the wire spool over one part of the double roller, over the position-changeable deflection roller and over the other part the dual role. The wire is thus moved in a loop path without interchangeable bends being applied to the wire. By designing the fixed Deflection roller as a double roller, the wire is guided twice, which leads to a considerable increase in operational reliability, since the wire is guided in a safe manner both when it is fed to the position-changing deflection roller and when it is removed from it. It proves to be particularly advantageous to mount the position-changing deflection roller on a vertically movable slide, since it is possible to pretension this slide away from the stationary deflection roller either by means of an elastic element or by the influence of gravity. It is thus achieved that a constant force for tensioning the wire is always applied, which can compensate fluctuations in the tensile force in a reliable manner. This both prevents the wire from jumping off the deflection rollers and also prevents the wire from breaking due to sudden, brief increases in the tensile force. However, it can also be possible to move the carriage by means of a controlled drive device for pretensioning the wire.

In günstiger Weise ist zwischen der Drahtspule und der Umlenkrolle eine Drahtführung vorgesehen, welche bevorzugterweise zwei drehbar gelagerte Rollen umfaßt. Mittels der Drahtführung wird erreicht, daß der Draht auch bei einer breiteren Drahtspule stets in sicherer Weise der Umlenkrolle zugeführt wird.A wire guide, which preferably comprises two rotatably mounted rollers, is advantageously provided between the wire spool and the deflection roller. By means of the wire guide it is achieved that the wire is always safely fed to the deflection roller even with a wider wire coil.

Weiterhin erweist es sich als günstig, wenn der Draht nach der ortsfesten Umlenkrolle über eine höhenveränderbare, an eine nachgeschaltete Drahtverarbeitungseinrichtung anpaßbare Führungsrolle leitbar ist. Mittels der Führungsrolle, welche bevorzugterweise am oberen Bereich der Drahtabspulvorrichtung angeordnet ist, wird vermieden, daß der Draht, nachdem er die Umlenkrolle verlassen hat, einer Wechselbiegung ausgesetzt wird.Furthermore, it proves to be favorable if the wire can be guided after the stationary deflection roller via a height-adjustable guide roller which can be adapted to a downstream wire processing device. By means of the guide roller, which is preferably arranged on the upper region of the wire unwinding device, it is avoided that the wire is subjected to an alternating bend after it has left the deflection roller.

Eine weitere, besonders günstige Ausgestaltung der erfindungsgemäßen Drahtabspulvorrichtung weist eine fliegend gelagerte Welle auf, auf welcher die Drahtspule mittels seitlich in eine zentrische Ausnehmung der Drahtrolle einführbaren, auf der Welle gelagerten Konen gelagert ist. Ein Aufschieben der Drahtrolle auf die Welle erfolgt dadurch, daß die Drahtspule, deren zentrische Ausnehmung größer ist als der Durchmesser der Welle, auf die Welle aufgelegt und in die Abspulposition verschoben wird. Mittels der Konen ist es möglich, die Drahtspule relativ zu der Welle zu zentrieren. Weiterhin wird beim Aufschieben der Konen die Drahtspule angehoben, so daß diese beispielsweise nicht mehr auf dem Boden aufliegt. Durch diese Maßnahme kann auf eine höhenveränderbare Abspulwelle ebenso verzichtet werden, wie auf eine höhenveränderbare Transporteinrichtung für die Drahtspule.Another, particularly favorable embodiment of the wire unwinding device according to the invention has a cantilevered one Shaft on which the wire spool is mounted by means of cones which can be inserted laterally into a central recess in the wire reel and are mounted on the shaft. The wire reel is pushed onto the shaft in that the wire spool, the central recess of which is larger than the diameter of the shaft, is placed on the shaft and moved into the unwinding position. By means of the cones it is possible to center the wire coil relative to the shaft. Furthermore, when the cones are pushed on, the wire spool is raised so that it no longer lies on the floor, for example. This measure makes it possible to dispense with a height-adjustable unwinding shaft as well as a height-adjustable transport device for the wire spool.

In einer günstigen Weiterentwicklung ist unterhalb der Welle ein in Längsrichtung der Welle verschiebbarer Transportschlitten zur Aufnahme der Drahtspule angeordnet, welcher bevorzugterweise zwei zueinander parallele, drehbare Stütz-. rollen umfaßt. Mittels des Transportschlittens ist es auf besonders einfache Weise möglich, die Drahtspule in die Drahtabspulvorrichtung einzubringen und an dieser zu lagern, da eine seitliche Verschiebung der Drahtspule ohne großen Kraftaufwand möglich ist. Durch die drehbaren Stützrollen ist es weiterhin möglich, die Drahtspule bei ihrer Positionierung zu drehen, beispielsweise um einen Mitnehmer mit der Drahtspule in Eingriff zu bringen.In a favorable further development, a transport carriage, which can be displaced in the longitudinal direction of the shaft, for accommodating the wire coil is arranged below the shaft and preferably has two rotatable support supports which are parallel to one another. roll includes. By means of the transport carriage, it is possible in a particularly simple manner to introduce the wire spool into the wire unwinding device and to store it there, since lateral displacement of the wire spool is possible without great effort. The rotatable support rollers also make it possible to rotate the wire spool during its positioning, for example in order to bring a driver into engagement with the wire spool.

In einer besonders günstigen Ausgestaltungsform sind die Drahtspule, die Umlenkrollen sowie alle mit dem Draht in Berührung kommenden Bauelemente elektrisch isolierend ausgebildet oder angeordnet, so daß elektrische Ströme, welche beispielsweise beim funkenerosiven Schneiden auf den Draht aufgebracht werden, nicht in die Drahtabspulvorrichtung geleitet werden können.In a particularly favorable embodiment, the wire spool, the deflection rollers and all components that come into contact with the wire are designed or arranged in an electrically insulating manner, so that electrical currents, which are applied to the wire during EDM cutting, for example, cannot be conducted into the wire unwinding device.

Erfindungsgemäß ist es möglich, die Welle und damit die auf dieser gelagerte Drahtrolle mittels eines Motors reversierbar stufenlos anzutreiben, wobei der Antrieb beim Abspulen lediglich in eine Richtung erfolgt. Das reversierende Spulen erweist sich beispielsweise dann als vorteilhaft, wenn bei einem Wechsel der der Drahtabspulvorrichtung nachgeordneten Einrichtung eine größere Menge Drahtes wieder auf die Drahtspule aufgespult werden soll. Da der Draht auch beim Rückspulen über die lageveränderbare Umlenkrolle geleitet wird, ist sichergestellt, daß der wiederaufgespulte Draht auf der Drahtspule mit ausreichender Zugspannung aufgewickelt ist. Der Rückspulvorgang kann weiterhin dann mit Vorteil genutzt werden, wenn eine der Drahtabspulvorrichtung nachgeschaltete Einrichtung nur über eine geringe Aufspulkapazität für Draht verfügt oder wenn der Draht mehrfach genutzt werden soll.According to the invention, it is possible to reverse the shaft and thus the wire reel mounted on it by means of a motor steplessly driven, the drive only takes place in one direction when unwinding. Reversing spooling proves to be advantageous, for example, when a larger amount of wire is to be rewound onto the wire spool when the device downstream of the wire unwinding device is changed. Since the wire is also passed over the position-changing deflection roller during rewinding, it is ensured that the rewound wire is wound on the wire reel with sufficient tension. The rewinding process can also be used to advantage if a device downstream of the wire unwinding device has only a low winding capacity for wire or if the wire is to be used several times.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung beschrieben. Dabei zeigt:

Fig. 1
eine schematische, perspektive Darstellung eines Ausführungsbeispiels der erfindungsgemäßen Drahtabspulvorrichtung;
Fig. 2
eine schematische Seitenansicht, teilweise im Schnitt, eines weiteren Ausführungsbeispiels der erfindungsgemäßen Drahtabspulvorrichtung und
Fig. 3
eine stirnseitige Ansicht, teils im Schnitt, der linken Seite des in Fig. 2 gezeigten Ausführungsbeispiels.
The invention is described below using an exemplary embodiment in conjunction with the drawing. It shows:
Fig. 1
is a schematic, perspective view of an embodiment of the wire unwinding device according to the invention;
Fig. 2
is a schematic side view, partly in section, of another embodiment of the wire unwinding device according to the invention and
Fig. 3
an end view, partly in section, the left side of the embodiment shown in Fig. 2.

In Fig. 1 ist in schematischer Weise ein erstes Ausführungsbeispiel der erfindungsgemäßen Drahtabspulvorrichtung dargestellt. Die Drahtabspulvorrichtung umfaßt ein nur schematisch angedeutetes Gehäuse 4, in welchem ein Motor 14 gelagert ist, welcher über ein Getriebe 15 eine in Fig. 1 nicht dargestellte Welle antreibt, auf welcher eine Drahtspule 2 gelagert werden kann. Die Lagerung der Drahtspule 2 wird nachfolgend anhand der Fig. 2 und 3 im einzelnen beschrieben werden.In Fig. 1, a first embodiment of the wire unwinding device according to the invention is shown schematically. The wire unwinding device comprises a housing 4, indicated only schematically, in which a motor 14 is mounted, which drives a shaft (not shown in FIG. 1) via a gear 15, on which a wire spool 2 can be stored. The storage of the wire coil 2 will be described below with reference to FIGS. 2 and 3 in detail.

In Fig. 1 ist ein unterhalb der Drahtspule 2 angeordneter Transportschlitten 12 dargestellt, welcher zwei zueinander parallele, drehbare Stützrollen 13 aufweist. Die Stützrollen 13 sind längs ihrer Achse verschiebbar im Gehäuse 4 gelagert. Der Schlitten 12 ist mit einer Rampe 16 verbunden, welche zusammen mit dem Schlitten 12 verschiebbar ist. Zum Aufnehmen und Einbringen der Drahtspule 2 in die Drahtabspulvorrichtung wird der Schlitten 12 mitsamt der Rampe 16 seitlich verschoben, bis die Drahtspule 2 von der nicht dargestellten, fliegend gelagerten Welle abgezogen ist. Es ist dann auf einfache Weise möglich, die Drahtspule über die Rampe 16 von den Stützrollen 13 wegzurollen und in analoger Weise gegen eine andere Drahtspule auszutauschen.1 shows a transport carriage 12 arranged below the wire spool 2, which has two mutually parallel, rotatable support rollers 13. The support rollers 13 are slidably mounted in the housing 4 along their axis. The carriage 12 is connected to a ramp 16 which can be moved together with the carriage 12. To pick up and insert the wire spool 2 into the wire unwinding device, the carriage 12 together with the ramp 16 is laterally displaced until the wire spool 2 is pulled off the floating shaft (not shown). It is then possible in a simple manner to roll the wire spool away from the support rollers 13 via the ramp 16 and to replace it with another wire spool in an analogous manner.

Die Drahtspule 2 umfaßt in üblicher Weise mehrere Lagen Draht 6, welcher beim Abspulen von der Drahtspule 2 zwischen zwei drehbaren Rollen 8a, 8b einer Drahtführung 9 hindurchgeleitet wird. Die Drahtführung 9 stellt sicher, daß der Draht trotz der durch die Anordnung auf der Drahtspule 2 erzwungenen Hin- und Herbewegung stets in sicherer Weise einer nachfolgend angeordneten ortsfesten Umlenkrolle 3 zugeführt wird. Unterhalb der ortsfesten Umlenkrolle 3 ist eine lageveränderbare Umlenkrolle 5 angeordnet, über welche der Draht nachfolgend geführt wird. Anschließend wird der Draht über eine zweite ortsfeste Umlenkrolle 3′ geleitet, welche, wie in Fig. 1 schematisch dargestellt, in gewissem Bereich höhenveränderbar einstellbar und/oder verschwenkbar ist. Erfindungsgemäß ist es wichtig, daß der von der Drahtspule 2 abgespulte Draht zuerst über eine lageveränderbare Umlenkrolle geleitet wird, welche, wie nachfolgend noch beschrieben werden wird, seitlich versetzbar ist, beispielsweise mittels eines Schlittens, um stets eine ausreichende Spannung auf den Draht aufzubringen, bevor dieser einer nicht-lageveränderbaren, ortsfesten Umlenkrolle (in dem in Fig. 1 gezeigten Ausführungsbeispiel der Umlenkrolle 3') zugeführt wird. Bei einer geeigneten Anordnung der lageveränderbaren Umlenkrolle 5 kann auf die ortsfeste Umlenkrolle 3 verzichtet werden. Die Anordnung der Umlenkrollen muß so gewählt werden, daß die durch die Drahtspule 2 vorgegebene Krümmungsrichtung des Drahtes nicht geändert wird, so daß Wechselbiegungen des Drahtes vermieden werden.The wire spool 2 comprises in the usual way a plurality of layers of wire 6, which is passed through between two rotatable rollers 8a, 8b of a wire guide 9 when the wire spool 2 is being unwound. The wire guide 9 ensures that the wire, despite the back and forth movement forced by the arrangement on the wire spool 2, is always fed in a safe manner to a subsequently arranged stationary deflection roller 3. Arranged below the stationary deflection roller 3 is a position-adjustable deflection roller 5, via which the wire is subsequently guided. Subsequently, the wire is passed over a second fixed deflection roller 3 ', which, as shown schematically in Fig. 1, is adjustable in height and / or pivotable in a certain range. According to the invention, it is important that the wire unwound from the wire spool 2 is first passed over a position-changing deflection roller which, as will be described below, can be laterally displaced, for example by means of a carriage, in order to always apply sufficient tension to the wire before that of a non-position-changeable, fixed deflection roller (in which in Fig. 1 shown embodiment of the guide roller 3 ') is supplied. With a suitable arrangement of the position-changing deflection roller 5, the stationary deflection roller 3 can be dispensed with. The arrangement of the deflection rollers must be selected so that the direction of curvature of the wire, which is predetermined by the wire coil 2, is not changed, so that alternate bends in the wire are avoided.

In Fig. 2 ist eine schematische Seitenansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Drahtabspulvorrichtung dargestellt. Dabei ist deutlich zu erkennen, daß die Drahtspule 2 auf einer fliegend gelagerten Welle 1 gelagert ist. Die Welle 1, wie schematisch dargestellt, über das Getriebe 15 mittels des Motors 14 betriebsverbunden und von diesem antreibbar. Eine Steuerung des Motors 14 erfolgt über eine im einzelnen nicht dargestellte, in einem Schaltschrank 19 angeordnete Steuerungseinrichtung.2 shows a schematic side view of a further exemplary embodiment of the wire unwinding device according to the invention. It can be clearly seen that the wire spool 2 is mounted on a floating shaft 1. The shaft 1, as shown schematically, is operatively connected via the gear 15 by means of the motor 14 and can be driven by it. The motor 14 is controlled via a control device, not shown in detail, which is arranged in a control cabinet 19.

Bei dem in Fig. 2 gezeigten Betriebszustand ist der Transportschlitten 12 längs der Stützrollen 13 seitlich aus dem Gehäuse 4 herausgezogen worden.In the operating state shown in FIG. 2, the transport carriage 12 has been pulled laterally out of the housing 4 along the support rollers 13.

Die Drahtspule 2 weist, wie bereits erwähnt, eine zentrische Ausnehmung auf, welche im Durchmesser größer ist, als der Außendurchmesser der Welle 1. Im Bereich der Mitnehmerscheibe 17 ist ein Konus 11a an der Welle befestigt. Ein weiterer Konus 11b ist auf die Welle 1 aufschiebbar, nachdem die Drahtspule 2 auf der Welle 1 angeordnet wurde. Der Konus 11b wird über eine Mutter 20, welche auf ein Gewinde der Welle 1 aufschraubbar ist, gegen die Drahtspule 2 gedrückt und in die zentrische Ausnehmung der Drahtspule 2 eingeführt. Auf diese Weise erfolgt zum einen eine exakte Zentrierung der Drahtspule, zum anderen wird diese von dem Transportschlitten 12 bzw. von dessen Stützrollen 13 angehoben, so daß sich die Drahtspule 2 frei drehen kann.As already mentioned, the wire coil 2 has a central recess which is larger in diameter than the outer diameter of the shaft 1. In the area of the driving disk 17, a cone 11a is fastened to the shaft. Another cone 11b can be pushed onto the shaft 1 after the wire coil 2 has been arranged on the shaft 1. The cone 11b is pressed against the wire spool 2 via a nut 20, which can be screwed onto a thread of the shaft 1, and inserted into the central recess of the wire spool 2. In this way, on the one hand there is an exact centering of the wire spool, on the other hand it is lifted by the transport carriage 12 or by its support rollers 13 so that the wire spool 2 can rotate freely.

Zum Zwecke der deutlicheren Darstellung sind die beiden drehbaren Rollen 8a, 8b der Drahtführung 9 in Fig. 2 versetzt gezeichnet worden.For the purpose of clearer illustration, the two rotatable rollers 8a, 8b of the wire guide 9 in FIG. 2 are offset been drawn.

Ähnlich dem in Fig. 1 gezeigten Ausführungsbeispiel wird der von der Drahtspule 2 abgeführte Draht zunächst über eine ortsfeste Umlenkrolle 3, dann über die lageveränderbare Umlenkrolle 5 und anschließend über die weitere ortsfeste Umlenkrolle 3' geleitet. Die lageveränderbare Umlenkrolle 5 ist an einem Schlitten 7 gelagert, welcher an einer oder mehreren vertikalen Schienen 21 geführt und in vertikaler Richtung verfahrbar ist. Durch die lageveränderbare Umlenkrolle 5 wird eine Vorspannkraft auf den Draht 6 aufgebracht. Die Größe der Vorspannkraft kann durch ein elastisches Element, durch Schwerkrafteinfluß oder, wie in Fig. 2 dargestellt, über eine Antriebseinrichtung 22 auf den Schlitten 7 aufgebracht werden. Die Antriebseinrichtung 22 ist mit einem Motor 23 betriebsverbunden und ist beispielsweise in Form einer umlaufenden Kette, welche über Kettenrader 24 geleitet wird, ausgebildet.Similar to the embodiment shown in FIG. 1, the wire removed from the wire spool 2 is first passed over a stationary deflection roller 3, then over the position-adjustable deflection roller 5 and then over the further stationary deflection roller 3 '. The position-changing deflection roller 5 is mounted on a carriage 7 which is guided on one or more vertical rails 21 and can be moved in the vertical direction. A prestressing force is applied to the wire 6 by the position-changing deflection roller 5. The magnitude of the prestressing force can be applied to the carriage 7 by an elastic element, by the influence of gravity or, as shown in FIG. 2, by a drive device 22. The drive device 22 is operationally connected to a motor 23 and is designed, for example, in the form of a revolving chain which is guided via chain wheels 24.

In Fig. 3 ist eine schematische, rückseitige Ansicht des in Fig. 2 gezeigten Ausführungsbeispiels abgebildet. Aus Fig. 3 ist insbesondere ersichtlich, daß der Draht 6 von der Drahtspule 2 über die Umlenkrollen 3, 5, 3′ so geführt wird, daß keine Änderung der bisher vorhandenen Krümmungsrichtung auftritt.FIG. 3 shows a schematic, rear view of the exemplary embodiment shown in FIG. 2. From Fig. 3 it can be seen in particular that the wire 6 is guided by the wire spool 2 over the deflection rollers 3, 5, 3 'so that no change in the previously existing direction of curvature occurs.

Die Umlenkrolle 3', welche, anders als die lageveränderbare Umlenkrolle 5, welche letztere während des Betriebs ständig in Bewegung ist, um eine Vorspannung auf den Draht aufzubringen, nach einmal erfolgter Einstellung ortsfest ist, leitet den Draht zu einer einstellbaren Führungsrolle 10, welche insbesondere höhenveränderbar an dem Gehäuse 4 gelagert ist. Durch die Führungsrolle 10 ist es möglich, den Draht in seiner Ablaufrichtung zu einer nachgeschalteten Verarbeitungsanlage so einzustellen, daß die bereits beschriebene Biegerichtung des Drahtes beibehalten werden kann.The deflection roller 3 ', which, unlike the position-adjustable deflection roller 5, which the latter is constantly in motion during operation in order to apply a pretension to the wire, is stationary once the adjustment has been carried out, guides the wire to an adjustable guide roller 10, which in particular adjustable in height is mounted on the housing 4. The guide roller 10 makes it possible to set the wire in its direction of flow to a downstream processing system in such a way that the bending direction of the wire already described can be maintained.

Bei den in den Fig. 1 bis 3 gezeigten Ausführungsbeispielen wurden zwei ortsfeste Umlenkrollen 3, 3′ verwendet, welche getrennt voneinander angeordnet sind. Im Gegensatz dazu ist es auch möglich, nur eine einzige ortsfeste Umlenkrolle 3 vorzusehen, welche als Doppelrolle ausgebildet ist und über welche der Draht geleitet wird, bevor er der lageveränderbaren Umlenkrolle 5 zugeführt wird und nachdem er über die Umlenkrolle 5 geleitet wurde.In the embodiments shown in FIGS. 1 to 3, two fixed deflection rollers 3, 3 'were used, which are arranged separately from one another. In contrast, it is also possible to provide only a single fixed deflection roller 3, which is designed as a double roller and over which the wire is guided before it is fed to the position-adjustable deflection roller 5 and after it has been passed over the deflection roller 5.

Da die erfindungsgemäße Drahtabspulvorrichtung zur Beschikkung verschiedenster Maschinen mit Draht verwendet werden kann, kann es günstig sein, das Gehäuse 4 auf feststellbaren Rollen zu lagern. Weiterhin kann es sich als vorteilhaft erweisen, den Bereich des Gehäuses, in welchem die Drahtspule 2 und die Umlenkrollen angeordnet sind, mittels einer Tür zur Umgebung hin zu verschließen, um Verschmutzungen und/oder Beeinträchtigungen des Abspulvorgangs zu vermeiden.Since the wire unwinding device according to the invention can be used to supply a wide variety of machines with wire, it can be advantageous to mount the housing 4 on lockable rollers. Furthermore, it can prove to be advantageous to close the area of the housing in which the wire spool 2 and the deflection rollers are arranged by means of a door to the environment in order to avoid contamination and / or impairment of the unwinding process.

Claims (15)

  1. Wire unwinding device for wire erosion machines, having a shaft (1) for receiving a wire bobbin (2), having a stationary deflection roller (3) mounted rotatably on the housing (4), a displaceable deflection roller (5) which is arranged to be rotatable in a region between the wire bobbin (2) and the stationary deflection roller (3), so that the wire (6) to be unwound from the wire bobbin (2) is guided in the direction of curvature determined by the wire bobbin (2) via the stationary deflection roller (3) and subsequently via the displaceable deflection roller (5), characterized in that the axes of the stationary and the movable deflection rollers and that of the unwinding device lie substantially parallel to one another, in that the deflection rollers (3, 5) and all the structural elements coming into contact with the wire (6) are constructed or arranged to be electrically insulating, and in that the motor (14) driving the shaft (1) of the unwinding device is reversibly operable.
  2. Wire unwinding device according to Claim 1, characterized in that the motor (14) is infinitely variably reversibly operable.
  3. Wire unwinding device according to Claim 1 or 2, characterized in that the displaceable deflection roller (5) is mounted in pre-tensioned manner for the application of a pre-tensioning force to the wire (6) in a direction of translational movement.
  4. Wire unwinding device according to one of Claims 1 to 3, characterized in that the stationary deflection roller (3) is constructed as a double roller, in that the displaceable deflection roller (5) is arranged below the stationary deflection roller (3), and in that the wire (6) is guided from the wire bobbin (2) via one part of the double roller, via the displaceable deflection roller (5) and then via the other part of the double roller.
  5. Wire unwinding device according to Claim 4, characterized in that the displaceable deflection roller (5) is mounted on a vertically movable carriage (7).
  6. Wire unwinding device according to Claim 3, characterized in that the carriage (7) is pre-tensioned away from the stationary deflection roller (3) by means of a resilient element.
  7. Wire unwinding device according to Claim 5, characterized in that the carriage (7) is pre-tensioned away from the stationary deflection roller (3) by the influence of gravity.
  8. Wire unwinding device according to one of Claims 1 to 5, characterized in that there is arranged between the wire bobbin (2) and the deflection roller (3) a wire guide means (9) provided with two rotatably mounted rollers (8a, 8b).
  9. Wire unwinding device according to one of Claims 1 to 8, characterized in that the wire (6) is guidable after the stationary deflection roller (3) via a height-alterable guide roller (10) which can be matched to a downstream wire processing apparatus.
  10. Wire unwinding device according to one of Claims 1 to 9, characterized in that the shaft (1) for receiving the wire bobbin (2) is mounted as a cantilever.
  11. Wire unwinding device according to one of Claims 1 to 10, characterized in that the wire bobbin (2) is mounted on the shaft (1) by means of cones (11) which can be inserted laterally into a central cutout of the wire roller (2) and are mounted on the shaft (1).
  12. Wire unwinding device according to one of Claims 1 to 11, characterized in that the wire unwinding device can traverse on rollers.
  13. Wire unwinding device according to one of Claims 1 to 12, characterized in that a transport carriage (12) which can be displaced in the longitudinal direction of the shaft (1) is arranged below the shaft (1) for receiving the wire bobbin (2).
  14. Wire unwinding device according to Claim 13, characterized in that the transport carriage (12) has two mutually parallel, rotatable support rollers (13).
  15. Wire unwinding device according to one of Claims 1 to 14, characterized in that the tension of the wire (6) is adjustable and can be kept at a constant value by means of the displaceable deflection rollers.
EP88107043A 1988-05-03 1988-05-03 Wire unwinding device Expired - Lifetime EP0340322B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE8888107043T DE3876789D1 (en) 1988-05-03 1988-05-03 WIRE DISCONNECTOR.
AT88107043T ATE83467T1 (en) 1988-05-03 1988-05-03 WIRE UNWINDING DEVICE.
EP88107043A EP0340322B1 (en) 1988-05-03 1988-05-03 Wire unwinding device
ES198888107043T ES2036233T3 (en) 1988-05-03 1988-05-03 WIRE WINDING DEVICE.
JP1109240A JPH0266069A (en) 1988-05-03 1989-05-01 Wire delivery device
US07/714,884 US5248104A (en) 1988-05-03 1991-06-14 Wire-unwinding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88107043A EP0340322B1 (en) 1988-05-03 1988-05-03 Wire unwinding device

Publications (2)

Publication Number Publication Date
EP0340322A1 EP0340322A1 (en) 1989-11-08
EP0340322B1 true EP0340322B1 (en) 1992-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107043A Expired - Lifetime EP0340322B1 (en) 1988-05-03 1988-05-03 Wire unwinding device

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Country Link
EP (1) EP0340322B1 (en)
JP (1) JPH0266069A (en)
AT (1) ATE83467T1 (en)
DE (1) DE3876789D1 (en)
ES (1) ES2036233T3 (en)

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FR2744110A1 (en) * 1996-01-30 1997-08-01 Ona Electro Erosion System to control winding and unwinding of wire for electrical discharge forming machines
DE19723635C2 (en) * 1997-06-05 1999-03-25 Witels App Masch Albert Gmbh Unwinder for wire or multi-wire goods
CN113860079B (en) * 2021-09-28 2023-06-02 湖南湘鹤集团电缆科技股份有限公司 Multi-production-line paying-off guide device for cable processing

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DE1025169B (en) * 1953-12-15 1958-02-27 Hans Brucker Dipl Ing Arrangement for measuring, controlling or regulating the train on machines with passing material at uneven running speed
CH385774A (en) * 1959-10-06 1964-12-31 Standard Telephon & Radio Ag Automatic drive stabilizer for winding machines
FR1361522A (en) * 1963-04-11 1964-05-22 Thomson Houston Comp Francaise Improvements to devices for winding wires and cables or similar flexible articles
GB1163983A (en) * 1967-03-28 1969-09-10 Bekaert Pvba Leon Improvements relating to the Winding of Strand Material
US3556373A (en) * 1968-10-31 1971-01-19 Comstock & Wescott Tensioning apparatus
JPS6064955U (en) * 1983-10-11 1985-05-08 タナツク・エンジニヤリング株式会社 Winding machine tension device

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DE3876789D1 (en) 1993-01-28
JPH0266069A (en) 1990-03-06
EP0340322A1 (en) 1989-11-08
ES2036233T3 (en) 1993-05-16
ATE83467T1 (en) 1993-01-15

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