EP2866236A1 - Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques - Google Patents

Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques Download PDF

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Publication number
EP2866236A1
EP2866236A1 EP20140189753 EP14189753A EP2866236A1 EP 2866236 A1 EP2866236 A1 EP 2866236A1 EP 20140189753 EP20140189753 EP 20140189753 EP 14189753 A EP14189753 A EP 14189753A EP 2866236 A1 EP2866236 A1 EP 2866236A1
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EP
European Patent Office
Prior art keywords
wire
tension
rotation
pushing
winding
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.)
Granted
Application number
EP20140189753
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German (de)
English (en)
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EP2866236B1 (fr
Inventor
Gian Battista Parati
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Marsilli and Co SpA
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Marsilli and Co SpA
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Publication date
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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a device for automatic wire tension adjustment during the various steps of winding in machines for winding electric coils.
  • the winding of coils for electrical or electromechanical components is performed generally by arranging the coils on spindles that are actuated so as to rotate the coils about their own axis and by feeding the wire to the coils so that it is progressively wound around them, although machines that perform winding by keeping the coils stationary and moving the wire around them also exist.
  • the wire is anchored, at the beginning and at the end of the winding, to pins provided on the coil, winding its ends around said pins.
  • wire tensioners which comprise generally a supporting structure provided with eyes and pulleys that define a path for the wire that arrives from a spool-magazine and, along said path, usually there is a brake, a load cell for detecting the tension of the wire, and a takeup arm, which can rotate, with respect to the supporting structure, about a corresponding axis and has the function of keeping the wire under tension, compensating for the different demand for wire by the elements that wind it around the coil or the pins.
  • the takeup arm is connected to springs that have the function of contrasting the rotation of the takeup arm when the demand for wire increases and to a damping element that has the function of damping the oscillations of the takeup arm about its own axis induced by the variations in the tension of the wire.
  • the aim of the present invention is to solve the problems described above, by providing a device for wire tension adjustment during the various steps of winding in machines for winding electric coils that allows to keep the tension of the wire substantially constant during the various steps of winding.
  • an object of the invention is to provide a device that allows to keep substantially constant the tension of the wire even during the steps of winding that cause accelerations and decelerations of the wire, such as for example in the transition from winding the wire around the pins to winding around the core of the coil and vice versa.
  • Another object of the invention is to provide a device which, by avoiding excessive and continuous oscillations of the takeup arm, allows to obtain a longer life of the damping element and therefore of the entire device.
  • a further object of the invention is to provide a device that can be manufactured with components that are commonly available and can be manufactured at competitive costs.
  • Another object of the invention is to provide a device that offers adequate assurances of safety and reliability in operation.
  • a device for automatic wire tension adjustment during the various steps of winding in machines for winding electric coils comprising a supporting structure that supports a series of elements that define a path for the wire to be fed to the coil being wound, along said path there being means for detecting the tension of the wire and a takeup arm that can rotate about an axis with respect to said supporting structure due to the variations of the tension of the wire, characterized in that, along said path, there is an element for pushing and braking the wire and in that it comprises means for detecting the rotation of said takeup arm about said axis relative to said supporting structure, said means for detecting the rotation of said takeup arm being connected functionally to said pushing and braking element for an automatic adjustment of the degree of thrust or braking applied to the wire as a function of the detected value of the rotation of said takeup arm about said axis.
  • the device according to the invention generally designated by the reference numeral 1, comprises a supporting structure 2, which supports a series of elements that cooperate with each other in defining a path for the wire 3 that must be fed to the coil around which it is to be wound.
  • the device comprises, along the path of the wire 3, an element 4 for pushing and braking the wire 3 and comprises furthermore means 8 for detecting the rotation of the takeup arm 6 about the axis 7 with respect to the supporting structure 2, and the rotation detection means 8 are connected functionally to the pushing and braking element 4 for an automatic adjustment of the degree of thrust or braking applied to the wire 3 as a function of the detected value of the rotation of the takeup arm 6 about the axis 7.
  • the supporting structure 2 in the illustrated embodiment, is constituted by a box-like body 9, which supports, on one of its faces, a series of elements that are engaged by the wire 3 to be fed to the coil.
  • the pushing and braking element 4 comprises a pulley 10 on which the wire 3 is wound and a motor 11 which actuates the pulley 10 with a torque that can be varied and adjusted as a function of the tension of the wire 3 detected by the means 5 for detecting the tension of the wire 3 and/or as a function of the rotation of the takeup arm 6 detected by the rotation detection means 8, so as to maintain a preset tension of the wire 3 in a substantially constant manner.
  • the means 5 for detecting the tension of the wire 3 comprise a pair of pulleys 12, 13, which have mutually parallel axes and are engaged in sequence by the wire 3 that is fed to the coil and are connected, in a per se known manner, to a load cell 14, which detects constantly the tension applied to the wire 3.
  • the takeup arm 6 is connected to means for damping its rotation about the corresponding axis 7.
  • the takeup arm 6 is pivoted, about the axis 7, to the supporting structure 2 by means of an intermediate portion thereof.
  • a pulley 15 around which the wire 3 to be fed to the coil engages, while the other end of the takeup arm 6 engages against a lever 16, which also is pivoted to the supporting structure 2 about an axis 17 that is parallel to the axis 7.
  • the lever 16 connects the takeup arm 6 to the damping means, which are constituted by a damping element 18, of a known type, and elastic means act on the lever 16 and are constituted by springs 19, 20, which contrast the rotation of the takeup arm 6 about the axis 7 in the direction of rotation that would lead to a reduction of the path followed by the wire 3 along the device according to the invention.
  • the springs 19, 20 have the function of compensating for any slackening of the wire 3 during the operation of the device.
  • the damping element 18 is constituted by a damping element of the pneumatic type, but it might also be constituted by a damping element of a different type, for example of the electrical type, or another damping element of a known type.
  • the means 8 for detecting the rotation of the takeup arm 6 comprise an angular transducer 21, which is connected to the takeup arm 6.
  • the pulley 10 of the pushing and braking element 4 is arranged upstream of the takeup arm 6 along the advancement direction of the wire 3 during the winding of the coil.
  • the means 5 for detecting the tension of the wire 3 are arranged downstream of the takeup arm 6 along the advancement direction of the wire 3 during the winding of the coil.
  • the wire 3 to be wound which arrives from a spool-magazine, in input to the device, passes through an eye 22, then through a guiding element 23, then passes through a pair of cleaning felts 24a, 24b, passes through a passage 25 defined in the arm 26 that supports the pair of pulleys 12, 13, winds around the pulley 10 of the pushing and braking element 4, then engages a guiding pulley 27, winds around the pulley 15 of the takeup arm 6 and finally engages the pair of pulleys 12, 13 before it is conveyed to the spool around which it must be wound.
  • the pushing and braking element 4 and the means 5 for detecting the tension of the wire 3 are part of a first automatic adjustment loop with feedback for automatic adjustment of the degree of thrust or braking applied by the pushing or braking element 4 and therefore for an automatic adjustment of the tension of the wire 3 mainly in the steps for winding the coil at a substantially constant rotation rate thereof.
  • the means 8 for detecting the rotation of the takeup 6 arm are connected functionally to the pushing and braking element 4 by means of a system for automatic adjustment with feedback in order to vary the degree of thrust or braking applied to the wire 3 by the pushing and braking element 4 following the detection of a rotation of the takeup arm 6 about its own axis 7 with respect to the supporting structure 2.
  • the pushing and braking element 4 and the means 8 for detecting the rotation of the take up arm 6 are part of a second automatic adjustment loop with feedback of the tension of the wire 3 for automatic adjustment of the degree of thrust or braking applied to the wire 3 by the pushing and braking element 4 as a function of the detected value of the rotation of the takeup arm 6 about the axis 7 and therefore for automatic adjustment of the tension of the wire 3 mainly in the steps for winding the coil with a variable rotation rate thereof.
  • the oscillations of the takeup arm 6 about the axis 7 are substantially nil and the tension of the wire 3 is adjusted and kept substantially constant mainly by means of the first automatic adjustment loop with feedback, i.e., by means of the detection of the tension of the wire 3 performed by means of the load cell 14 and by means of an actuation of the pushing and braking element 4 as a function of the detected tension value with respect to the desired value.
  • the beginning of the oscillations is detected promptly by the angular transducer 21 and, by means of the second automatic adjustment loop with feedback, the thrust or braking action performed by the pushing and braking element 4 is changed automatically, by means of an adequate actuation of the pushing and braking element 4, as a function of the detection performed by the angular transducer 21.
  • the pushing and braking element 4 applies a pushing action to the wire 3, facilitating its advancements toward the coil being wound and thus returning the tension of the wire 3 to the desired value.
  • the device according to the invention achieves fully the intended aim, since it allows to maintain substantially constant the tension of the wire during the various steps of the winding of the coil, and in particular allows to keep substantially constant the tension of the wire even during the winding steps that require an acceleration and a deceleration of the rotation of the coil about its own axis.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
EP14189753.8A 2013-10-22 2014-10-21 Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques Active EP2866236B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001761A ITMI20131761A1 (it) 2013-10-22 2013-10-22 Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.

Publications (2)

Publication Number Publication Date
EP2866236A1 true EP2866236A1 (fr) 2015-04-29
EP2866236B1 EP2866236B1 (fr) 2018-11-28

Family

ID=49841725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14189753.8A Active EP2866236B1 (fr) 2013-10-22 2014-10-21 Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques

Country Status (2)

Country Link
EP (1) EP2866236B1 (fr)
IT (1) ITMI20131761A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600127236A1 (it) * 2016-12-16 2018-06-16 Marsilli S P A Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.
JP2018177497A (ja) * 2017-04-18 2018-11-15 日特エンジニアリング株式会社 テンション装置及びテンション制御方法
EP3651324B1 (fr) * 2018-11-07 2024-05-22 Marsilli S.p.A. Bobineuse, notamment pour bobiner les enroulements sur les poles magnetiques du stator, avec management de la tension du fil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424770A2 (fr) * 1989-10-25 1991-05-02 MARSILLI & CO. S.P.A. Dispositif programmable à réglage automatique de la tension des fils pendant leur enroulement
EP0926090A2 (fr) * 1997-12-05 1999-06-30 Nittoku Engineering Kabushiki Kaisha Dispositif et procédé de bobinage
EP2031610A1 (fr) * 2006-05-26 2009-03-04 Nittoku Engineering Co., Ltd. Système d'enroulement de fil métallique, dispositif de tension, et procédé d'enroulement de fil métallique
EP2617670A2 (fr) * 2012-01-20 2013-07-24 Nittoku Engineering Co., Ltd. Dispositif de tension et procédé d'application de tension

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627731C1 (de) 1986-08-16 1988-03-31 Gustav Memminger Fadenliefervorrichtung mit elektronischer Fadenspannungsregelung
FR2616139B1 (fr) 1987-06-05 1990-10-19 Altic Sa Devidoir a reglage automatique de la tension du fil
FR2655888A1 (fr) 1989-12-20 1991-06-21 Prosys Devidoir a regulation de tension du fil pour alimenter une bobineuse a partir d'une nourrice.
JP3422042B2 (ja) 1993-04-27 2003-06-30 株式会社村田製作所 巻線機におけるテンション付与機構及びテンション制御方法
ITFI20040113A1 (it) 2004-05-14 2004-08-13 Giovanni Corsani Dispositivo alimentatore di filo
JP2006225051A (ja) 2005-02-15 2006-08-31 Nittoku Eng Co Ltd テンション監視装置
ITMI20080410A1 (it) 2008-03-11 2009-09-12 Btsr Int Spa Dispositivo e metodo per l'alimentazione a tensione costante di filati alimentati in modo discontinuo
ITMI20111983A1 (it) 2011-11-02 2013-05-03 Btsr Int Spa Dispositivo alimentatore positivo per alimentare a tensione costante fili metallici

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0424770A2 (fr) * 1989-10-25 1991-05-02 MARSILLI & CO. S.P.A. Dispositif programmable à réglage automatique de la tension des fils pendant leur enroulement
EP0926090A2 (fr) * 1997-12-05 1999-06-30 Nittoku Engineering Kabushiki Kaisha Dispositif et procédé de bobinage
EP2031610A1 (fr) * 2006-05-26 2009-03-04 Nittoku Engineering Co., Ltd. Système d'enroulement de fil métallique, dispositif de tension, et procédé d'enroulement de fil métallique
EP2617670A2 (fr) * 2012-01-20 2013-07-24 Nittoku Engineering Co., Ltd. Dispositif de tension et procédé d'application de tension

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600127236A1 (it) * 2016-12-16 2018-06-16 Marsilli S P A Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.
EP3336864A1 (fr) * 2016-12-16 2018-06-20 Marsilli S.p.A. Dispositif de réglage automatique de la tension de fils pendant les différentes étapes d'enroulement dans des machines permettant d'enrouler des bobines électriques
JP2018177497A (ja) * 2017-04-18 2018-11-15 日特エンジニアリング株式会社 テンション装置及びテンション制御方法
EP3651324B1 (fr) * 2018-11-07 2024-05-22 Marsilli S.p.A. Bobineuse, notamment pour bobiner les enroulements sur les poles magnetiques du stator, avec management de la tension du fil

Also Published As

Publication number Publication date
ITMI20131761A1 (it) 2015-04-23
EP2866236B1 (fr) 2018-11-28

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