EP3336864B1 - Dispositif de réglage automatique de la tension de fils pendant les différentes étapes d'enroulement dans des machines permettant d'enrouler des bobines électriques - Google Patents

Dispositif de réglage automatique de la tension de fils pendant les différentes étapes d'enroulement dans des machines permettant d'enrouler des bobines électriques 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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German (de)
English (en)
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EP3336864A1 (fr
Inventor
Gian Battista Parati
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.)
Marsilli and Co SpA
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Marsilli and Co SpA
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Publication of EP3336864A1 publication Critical patent/EP3336864A1/fr
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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. Dispositif (1) pour régler automatiquement une tension de fil pendant les diverses étapes d'enroulement dans des machines destinées à enrouler des bobines électriques, qui comporte une structure de support (2) qui supporte une série d'éléments qui définissent un trajet pour le fil (3) devant être acheminé jusqu'à la bobine en cours d'enroulement, le long du trajet étant agencés :
    - un élément (4) pour pousser et freiner le fil (3),
    - un bras de tension (5) qui est supporté de sorte qu'il peut être mis en rotation par ladite structure de support (2) autour d'un axe (6) et qui peut tourner autour dudit axe (6), par rapport à ladite structure de support (2), en raison de variations de la tension du fil (3),
    - des moyens de détection de la tension (7) du fil (3),
    - des moyens supplémentaires (8) étant prévus pour détecter la position angulaire dudit bras d'enroulement (5) autour dudit axe (6) par rapport à ladite structure de support (2), lesdits moyens de détection de la position angulaire (8) dudit bras d'enroulement (5) étant fonctionnellement reliés audit élément de poussée et de freinage (4) pour un réglage automatique du degré de poussée ou de freinage appliqué au fil (3) en fonction de la valeur détectée de la rotation dudit bras d'enroulement (5) autour dudit axe (6),
    caractérisé en ce que le dispositif (1) comporte un actionneur (9) qui est relié audit bras d'enroulement (5) et est adapté pour faire varier la position angulaire dudit bras d'enroulement (5) autour dudit axe (6), ledit actionneur (9) étant fonctionnellement relié auxdits moyens de détection de la tension (7) du fil (3) afin de faire varier la position angulaire dudit bras d'enroulement (5) en fonction de la tension du fil (3) détectée par lesdits moyens de détection de la tension (7) du fil (3) .
  2. Dispositif selon la revendication 1, caractérisé en ce que lesdits moyens de détection de la tension (7) du fil (3) sont fonctionnellement reliés audit actionneur (9) au moyen d'une première boucle asservie de réglage automatique (25) afin de faire varier la force appliquée par ledit actionneur (9) audit bras d'enroulement (5) en fonction de la tension appliquée au fil (3) en cours d'enroulement.
  3. Dispositif selon la revendication 2, caractérisé en ce que lesdits moyens de détection de la position angulaire (8) dudit bras de réception (5) sont fonctionnellement reliés audit élément de poussée et de freinage (4) via une deuxième boucle asservie de réglage automatique (26) afin de faire varier le degré de poussée ou de freinage appliqué au fil (3) par ledit élément de poussée et de freinage (4) en conséquence de la détection d'une rotation dudit bras de tension (5) autour de son axe propre (6) par rapport à ladite structure de support (2) .
  4. Dispositif selon la revendication 3, caractérisé en ce qu'il comporte une troisième boucle asservie de réglage automatique (27), qui relie lesdits moyens de détection de la position angulaire (8) dudit bras de tension (5) à ladite première boucle asservie de réglage automatique (25) afin de faire varier la sensibilité de ladite première boucle asservie de réglage automatique (25) en fonction de la rotation dudit bras de tension (5) autour dudit axe (6) par rapport à ladite structure de support (2).
  5. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits moyens de détection de la tension (7) du fil (3) sont agencés en aval dudit bras de tension (5) le long de la direction d'avance du fil (3) pendant l'enroulement de la bobine.
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit élément de poussée et de freinage (4) est agencé en amont dudit bras de tension (5) le long de la direction d'avance du fil (3) pendant l'enroulement de la bobine.
  7. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit élément de poussée et de freinage (4) comporte une poulie (11) sur laquelle le fil (3) est enroulé et un moteur (12) qui actionne ladite poulie (11) avec un couple qui peut varier en fonction de la rotation dudit bras de tension (5) autour dudit axe (6) qui est détecté par lesdits moyens de détection de la position angulaire (8) dudit bras de tension (5).
  8. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdits moyens de détection de la position angulaire (8) dudit bras de tension (5) autour dudit axe (6) comportent un transducteur d'angle (19).
  9. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit actionneur (9) est constitué d'un actionneur piézoélectrique linéaire.
  10. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il comporte des moyens élastiques (17) qui s'opposent à la rotation dudit bras de tension (5) autour de son axe propre (6) par rapport à ladite structure de support (2) dans le sens de rotation qui réduit la tension du fil (3).
  11. Dispositif selon la revendication 10, caractérisé en ce que ledit actionneur (9) agit sur ledit bras de tension (5) en concordance avec l'action desdits moyens élastiques (17) ou en opposition à celle-ci.
EP17206731.6A 2016-12-16 2017-12-12 Dispositif de réglage automatique de la tension de fils pendant les différentes étapes d'enroulement dans des machines permettant d'enrouler des bobines électriques Active EP3336864B1 (fr)

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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Publication Number Publication Date
EP3336864A1 EP3336864A1 (fr) 2018-06-20
EP3336864B1 true EP3336864B1 (fr) 2020-08-26

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EP17206731.6A Active EP3336864B1 (fr) 2016-12-16 2017-12-12 Dispositif de réglage automatique de la tension de fils pendant les différentes étapes d'enroulement dans des machines permettant d'enrouler des bobines électriques

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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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JPH11222357A (ja) * 1997-12-05 1999-08-17 Nittoku Eng Co Ltd 巻線装置および巻線方法
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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EP3336864A1 (fr) 2018-06-20

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