EP3336864B1 - Vorrichtung für automatische drahtspannungsanpassungen während verschiedener stufen von wickelmaschinen zum wickeln von elektrischen spulen - Google Patents

Vorrichtung für automatische drahtspannungsanpassungen während verschiedener stufen von wickelmaschinen zum wickeln von elektrischen spulen Download PDF

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Publication number
EP3336864B1
EP3336864B1 EP17206731.6A EP17206731A EP3336864B1 EP 3336864 B1 EP3336864 B1 EP 3336864B1 EP 17206731 A EP17206731 A EP 17206731A EP 3336864 B1 EP3336864 B1 EP 3336864B1
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EP
European Patent Office
Prior art keywords
wire
takeup arm
tension
detecting
axis
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EP17206731.6A
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English (en)
French (fr)
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EP3336864A1 (de
Inventor
Gian Battista Parati
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Marsilli and Co SpA
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Marsilli and Co SpA
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/094—Tensioning or braking devices
    • 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
    • B65H59/18—Driven rotary elements
    • 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
    • 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
    • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means
    • B65H59/388—Regulating forwarding speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/36—Wires

Definitions

  • the present invention relates to a device for automatically adjusting wire tension during the various steps of winding in machines for winding electrical coils.
  • the winding of coils for electrical or electromechanical components is generally carried out by placing the reels on spindles which are actuated so as to rotate the reels about their axis and then feeding the wire to the reels so that it is progressively wound around them.
  • the wire is anchored, at the start and at the end of winding, to pins that are provided on the coil, by winding its ends around such pins.
  • wire stretchers which comprise, generally, a supporting structure that has loops and pulleys that define a path for the wire originating from a distaff/magazine and, along such path, there is usually a brake, a load cell for detecting the tension of the wire, and a takeup arm that can rotate, with respect to the supporting structure, about a corresponding axis and the function of which is to keep the wire under tension thus compensating the varying demand for wire from the elements that carry out its winding around the reel or the pins.
  • the takeup arm is connected to springs, the function of which is to oppose the rotation of the takeup arm when the demand for wire increases, and to a damper, the function of which is to dampen the oscillations of the takeup arm about its own axis which are induced by the variations in tension of the wire.
  • the aim of the present invention is to solve the above mentioned drawback, by providing a device for automatically adjusting wire tension during the various steps of winding in machines for winding electrical coils which ensures a correct wire tension even in the presence of high accelerations and decelerations of the wire during winding, thus avoiding the formation of "slow turns".
  • an object of the invention is to provide a device that is capable of maintaining a constant tension of the wire during the winding even in windings with multiple layers of turns.
  • Another object of the invention is to provide a device that can be provided with components that are readily available, and that can be produced at low cost.
  • a further object of the invention is to provide a device that offers adequate assurances of safety and reliability of operation.
  • a device for automatically adjusting wire tension during the various steps of winding in machines for winding electrical coils which comprises a supporting structure which supports a series of elements that define a path for the wire to be fed to the coil being wound, along said path being arranged:
  • the device according to the invention comprises a supporting structure 2 which supports a series of elements that cooperate with each other to define a path for the wire 3 that has to be supplied to the reel around which it is to be wound.
  • an element 4 for pushing and braking the wire 3 a takeup arm 5, which is supported so that it can rotate about an axis 6 by the supporting structure 2 and which can rotate about such axis 6, with respect to the supporting structure 2, by virtue of the variations in tension of the wire 3, and means of detecting the tension 7 of the wire 3.
  • the device in question also comprises means of detecting the angular position 8 of the takeup arm 5 about its rotation axis 6 with respect to the supporting structure 2. These means of detecting the angular position 8 of the takeup arm 5 are provided in addition to the means of detecting the tension 7 of the wire 3. The means of detecting the angular position 8 of the takeup arm 5 are functionally connected to the pushing and braking element 4 in order to obtain an automatic adjustment of the degree of thrust or braking, which is applied to the wire 3, as a function of the detected value of the rotation of the takeup arm 5 about the axis 6.
  • the device comprises an actuator 9 which is connected to the takeup arm 5 and which is adapted to vary the angular position of the takeup arm 5 about the axis 6; such actuator 9 is functionally connected to the means of detecting the tension 7 of the wire 3 in order to vary the angular position of the takeup arm 5 as a function of the tension of the wire 3.
  • the supporting structure 2 in the embodiment shown, is constituted by a box-like body 10 which, on one of its faces, supports the series of elements that are engaged by the wire 3 to be fed to the reel.
  • the pushing and braking element 4 comprises a pulley 11 on which the wire 3 is wound and a motor 12, for example an electric motor of the brushless type, which actuates the pulley 11 with a torque that is variable and adjustable as a function of the rotation of the takeup arm 5 detected by the means of detecting the angular position 8 so as to maintain, substantially constantly, a preset tension of the wire 3.
  • a motor 12 for example an electric motor of the brushless type, which actuates the pulley 11 with a torque that is variable and adjustable as a function of the rotation of the takeup arm 5 detected by the means of detecting the angular position 8 so as to maintain, substantially constantly, a preset tension of the wire 3.
  • the means of detecting the tension 7 of the wire 3 comprise a pair of pulleys 13, 14 with mutually parallel axes, which are engaged in sequence by the wire 3 that is fed to the reel and which are connected, in a way that is known per se, to a load cell 15 that constantly detects the tension applied to the wire 3.
  • the takeup arm 5 is pivoted, about the axis 6, to the supporting structure 2 by way of a region proximate to one of its ends. At the opposite end of the takeup arm 5 there is a pulley 16 around which the wire 3 to be fed to the reel engages.
  • the end of the takeup arm 5 that lies opposite the end that carries the pulley 16 is connected to elastic means 17 that contrast the rotation of the takeup arm 5 about the axis 6 in its direction of rotation that causes a reduction of the tension applied to the wire 3.
  • Such elastic means 17 comprise a helical spring 18 which is connected, by way of an end thereof, to the takeup arm 5 and, by way of the other end thereof, to the supporting structure 2.
  • the actuator 9 is preferably constituted by a piezoelectric linear actuator which is connected, by way of an end thereof, to the supporting structure 2, and, by way of the other end thereof, to a region of the takeup arm 5 arranged on the other side from the region with which the spring 18 engages with respect to the axis 6.
  • the actuator 9, according to how it is actuated, has the effect of boosting the action of the spring 18 or of reducing the action of the spring 18 on the takeup arm 5.
  • the means of detecting the angular position 8 of the takeup arm 5 comprise an angular transducer 19, for example a conventional encoder, which is connected to the takeup arm 5 by way of a belt connection 20.
  • the pulley 11 of the pushing and braking element 4 is arranged upstream of the takeup arm 5 along the advancement direction of the wire 3 during the winding of the coil.
  • the means of detecting the tension 7 of the wire 3 are arranged downstream of the takeup arm 5 along the advancement direction of the wire 3 during the winding of the coil.
  • the wire 3 to be wound originating from a distaff/magazine, upon entering the device, passes on a transmission pulley 21, then through a pair of cleaning felts 22, 23, then it winds around the pulley 11 of the pushing and braking element 4, then it engages with a transmission pulley 24, then it winds around the pulley 16 of the takeup arm 5 and, finally, it engages with the pair of pulleys 13, 14 and with an additional pulley 28 before being conveyed to the reel around which it is to be wound.
  • the means of detecting the tension 7 of the wire 3 are functionally connected to the actuator 9 by way of a first automatic feedback adjustment loop 25, conveniently of the electronic type, with a corresponding controller C1 which varies, by acting on the actuator 9, the force applied by this to the takeup arm 5 as a function of the tension applied to the wire 3 being wound.
  • the means of detecting the angular position 8 of the takeup arm 5 are functionally connected to the pushing and braking element 4 via a second automatic feedback adjustment loop 26, conveniently of the electronic type, with a corresponding controller C2 which varies the degree of thrust or braking applied to the wire 3 being wound by the pushing and braking element 4 as a consequence of the detection of a rotation of the takeup arm 5 about its own axis 6 with respect to the supporting structure 2.
  • the third automatic feedback adjustment loop 27 adjusts the sensitivity of the first automatic feedback adjustment loop 25 as a function of the rotation of the takeup arm 5 about its own axis 6, with respect to the supporting structure 2, detected by the means of detecting the angular position 8 of the takeup arm 5.
  • these conditions are met in that, during the winding of the wire 3, as the working conditions vary, for example owing to variations of the rotation speed of the coil being wound, owing to variations of the winding diameter, which increases as the quantity of wire 3 wound increases, owing to variations of the friction that the wire 3 encounters along its path, caused by the pair of cleaning felts 22, 23 or by other resistances, the constancy of the tension of the wire 3 is ensured mainly by the intervention of the first automatic feedback adjustment loop 25 which, by detecting the tension of the wire 3 by way of the load cell 15, keeps the tension constant by intervening on the takeup arm 5 by way of the actuator 9 which causes a variation of the force exerted by the takeup arm 5 on the wire 3 being wound.
  • the limitation of the rotation of the takeup arm 5 about the axis 6 with respect to the supporting structure 2 is obtained mainly by way of the second automatic feedback adjustment loop 26 which, by measuring the angular position of the takeup arm 5 about the axis 6, makes it possible to have a programmable takeup of the wire 3 in the various steps of operation of winding the wire 3 onto the reel, such as for example the coupling of the wire 3 to anchor points on the reel, the actual winding itself, difficult passages of the wire 3, or variations in the position of the wire guide that directs the wire 3 onto the reel.
  • the second automatic feedback adjustment loop 26 commands the actuation of the motor 12 as a function of the angular position of the takeup arm 5, making the motor 12 act as a motor or as a brake according to the working conditions and then returning the takeup arm 5 to the initial position i.e. to the preset position that it is desired be maintained.
  • the third automatic feedback adjustment loop 27 manages the first and the second automatic feedback adjustment loop 25 and 26, optimizing their behavior as a function of the working conditions and of the wire 3.
  • the second automatic feedback adjustment loop 26 ensures the takeup arm 5 is maintained around such position in all the steps of winding, while the first automatic feedback adjustment loop 25 keeps the tension of the wire 3 constant by actuating the actuator 9.
  • the third automatic feedback adjustment loop 27 intervenes on the angular position of the takeup arm 5 and on the reactivity of the first automatic feedback adjustment loop 25 on the basis of the working conditions.
  • any deviation of the takeup arm 5 from this preset or desired position results in a reaction of the first automatic feedback adjustment loop 25.
  • the third automatic feedback adjustment loop 27 increases the reactivity of the first automatic feedback adjustment loop 25 so that this intervenes, with the utmost rapidity, on the actuator 9 which corrects the position of the takeup arm 5, returning it to the preset position and thus keeping the tension of the wire 3 constant.
  • the device according to the invention fully achieves the set aim, in that it makes it possible to keep the wire tension substantially constant during the various steps of winding the coil, thus obtaining a regular winding of the wire, and in particular it makes it possible to avoid the occurrence of the phenomenon of "slow turns", even in the winding of some types of coils with layered turns, for which the occurrence of this problem would be more likely.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (11)

  1. Eine Vorrichtung (1) für automatische Drahtspannungsanpassung während der verschiedenen Stufen der Wicklung in Maschinen zum Wickeln elektrischer Spulen, die eine tragende Struktur (2) umfasst, welche eine Reihe von Elementen trägt, die einen Pfad für den Draht (3) bestimmen, der der Spule, die gewickelt wird, zugeführt werden soll; wobei entlang dem Pfad Folgendes angeordnet ist:
    - ein Element (4) zum Schieben und Abbremsen des Drahts (3) ;
    - ein Aufnahmearm (5), der von der tragenden Struktur (2) so getragen ist, dass er sich um eine Achse (6) drehen kann, und der sich aufgrund von Veränderungen in der Spannung des Drahts (3) mit Bezug auf die tragende Struktur (2) um die Achse (6) drehen kann;
    - Mittel zur Erfassung der Spannung (7) des Drahts (3);
    - wobei weitere Mittel (8) bereitgestellt sind zur Erfassung der Winkelposition des Aufnahmearms (5) um die Achse (6) im Verhältnis zu der tragenden Struktur (2); wobei die Mittel (8) zur Erfassung der Winkelposition des Aufnahmearms (5) funktional mit dem Schub- und Bremselement (4) verbunden sind zur automatischen Anpassung des Grades an Schub oder Bremsung, der an den Draht (3) angelegt wird, in Abhängigkeit vom erfassten Wert der Drehung des Aufnahmearms (5) um die Achse (6);
    dadurch gekennzeichnet, dass die Vorrichtung (1) ein Antriebselement (9) umfasst, welches mit dem Aufnahmearm (5) verbunden und ausgebildet ist, um die Winkelposition des Aufnahmearms (5) um die Achse (6) zu verändern, wobei das Antriebselement (9) funktional mit den Mitteln zur Erfassung der Spannung (7) des Drahts (3) verbunden ist, um die Winkelposition des Aufnahmearms (5) in Abhängigkeit von der Spannung des Drahts (3), die von den Mitteln zur Erfassung der Spannung (7) des Drahts (3) erfasst wird, zu verändern.
  2. Die Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Mittel zur Erfassung der Spannung (7) des Drahts (3) über einen ersten automatischen Anpassungs-Regelkreis (25) funktional mit dem Antriebselement (9) verbunden sind, um die Kraft, die von dem Antriebselement (9) auf den Aufnahmearm (5) ausgeübt wird, in Abhängigkeit von der Spannung, die auf den Draht (3), der gewickelt wird, ausgeübt wird, zu verändern.
  3. Die Vorrichtung gemäß Anspruch 2, dadurch gekennzeichnet, dass die Mittel (8) zur Erfassung der Winkelposition des Aufnahmearms (5) funktional über einen zweiten automatischen Anpassungs-Regelkreis (26) mit dem Schub- und Bremselement (4) verbunden sind, um den Grad des Schubs oder der Bremsung, der von dem Schub- und Bremselement (4) an den Draht (3) angelegt wird, infolge der Erfassung einer Drehung des Aufnahmearms (5) um seine eigene Achse (6) mit Bezug auf die tragende Struktur (2) zu verändern.
  4. Die Vorrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass sie einen dritten automatischen Anpassungs-Regelkreis (27) umfasst, welcher die Mittel (8) zur Erfassung der Winkelposition des Aufnahmearms (5) mit dem ersten automatischen Anpassungs-Regelkreis (25) verbindet, um die Empfindlichkeit des ersten automatischen Anpassungs-Regelkreises (25) in Abhängigkeit von der Drehung des Aufnahmearms (5) um die Achse (6) mit Bezug auf die tragende Struktur (2) zu verändern.
  5. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die Mittel zur Erfassung der Spannung (7) des Drahts (3) in der Vorschubrichtung des Drahts (3) während des Wickelns der Spule stromabwärts von dem Aufnahmearm (5) angeordnet sind.
  6. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das Schub- und Bremselement (4) in der Vorschubrichtung des Drahts (3) während des Wickelns der Spule stromaufwärts von dem Aufnahmearm (5) angeordnet ist.
  7. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das Schub- und Bremselement (4) eine Riemenscheibe (11) umfasst, auf welche der Draht (3) gewickelt ist, und einen Motor (12), der die Riemenscheibe (11) mit einem Drehmoment antreibt, das in Abhängigkeit von der Drehung des Aufnahmearms (5) um die Achse (6), die von den Mitteln (8) zur Erfassung der Winkelposition des Aufnahmearms (5) erfasst wird, variieren kann.
  8. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die Mittel (8) zur Erfassung der Winkelposition des Aufnahmearms (5) um die Achse (9) einen Winkelaufnehmer (19) umfassen.
  9. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass das Antriebselement (9) aus einem piezoelektrischen Linearaktor besteht.
  10. Die Vorrichtung gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass sie elastische Mittel (17) umfasst, die der Drehung des Aufnahmearms (5) um seine eigene Achse (6) mit Bezug auf die tragende Struktur (2) in die Drehrichtung, welche die Spannung des Drahts (3) vermindert, entgegenwirken.
  11. Die Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass das Antriebselement (9) auf den Aufnahmearm (5) in Übereinstimmung mit oder entgegen der Wirkung der elastischen Mittel (17) einwirkt.
EP17206731.6A 2016-12-16 2017-12-12 Vorrichtung für automatische drahtspannungsanpassungen während verschiedener stufen von wickelmaschinen zum wickeln von elektrischen spulen Active EP3336864B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000127236A IT201600127236A1 (it) 2016-12-16 2016-12-16 Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.

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EP3336864A1 EP3336864A1 (de) 2018-06-20
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IT201800010099A1 (it) * 2018-11-07 2020-05-07 Marsilli S P A Macchina avvolgitrice, in particolare per l’avvolgimento di spire sui poli magnetici di statori, con gestione della tensione del filo perfezionata.
CN109484909B (zh) * 2018-12-28 2023-12-22 巩义市恒星金属制品有限公司 无动力卧式放线架
CN110723595B (zh) * 2019-11-06 2021-07-16 苏州创易技研股份有限公司 一种伺服张力器的三段式张力控制方法
CN111573442A (zh) * 2020-05-29 2020-08-25 武汉固德超前高新科技研发有限公司 电缆电动绞车装置及其使用方法
CN116013681B (zh) * 2022-12-28 2023-11-17 无锡德润电子有限公司 基于反馈调节的电感、变压器线圈卷绕自适应治具和工艺

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DE19860608A1 (de) * 1998-12-29 2000-07-06 Amira Ag Cham Drahtbremse für Spulenwickelmaschinen
JP4734409B2 (ja) * 2006-05-26 2011-07-27 日特エンジニアリング株式会社 巻線装置、テンション装置、及び巻線方法
ITMI20111983A1 (it) * 2011-11-02 2013-05-03 Btsr Int Spa Dispositivo alimentatore positivo per alimentare a tensione costante fili metallici
ITMI20131761A1 (it) * 2013-10-22 2015-04-23 Marsilli & Co Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.

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