EP0424770B1 - Programmierbare Vorrichtung zum automatischen Einstellen der Zugspannung beim Wickeln von Drähten - Google Patents

Programmierbare Vorrichtung zum automatischen Einstellen der Zugspannung beim Wickeln von Drähten Download PDF

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Publication number
EP0424770B1
EP0424770B1 EP90119693A EP90119693A EP0424770B1 EP 0424770 B1 EP0424770 B1 EP 0424770B1 EP 90119693 A EP90119693 A EP 90119693A EP 90119693 A EP90119693 A EP 90119693A EP 0424770 B1 EP0424770 B1 EP 0424770B1
Authority
EP
European Patent Office
Prior art keywords
wire
roller
spring
brake pulley
sensing unit
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
EP90119693A
Other languages
English (en)
French (fr)
Other versions
EP0424770A2 (de
EP0424770A3 (en
Inventor
Gian Battista Parati
Alberto Bertolone
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
Original Assignee
Marsilli and Co SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marsilli and Co SpA filed Critical Marsilli and Co SpA
Publication of EP0424770A2 publication Critical patent/EP0424770A2/de
Publication of EP0424770A3 publication Critical patent/EP0424770A3/en
Application granted granted Critical
Publication of EP0424770B1 publication Critical patent/EP0424770B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H59/16—Braked elements rotated by material
    • 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 programmable self-adjusting device for tensioning wires during winding.
  • the tension or gram force varies according to the diameter of the various wires and as a function of the winding characteristics to be obtained.
  • Transient phenomena furthermore occur during the winding process, due to the accelerations and decelerations of the winding machine and to other unforeseeable phenomena intrinsic to the characteristics of the wire being wound, which create tension changes which must necessarily be compensated.
  • Wire tensioning devices are currently used in order to keep the tension constant; their function is to return the value of the wire tension within set margins, to avoid incorrect windings or breakages of the wire.
  • the most common wire tensioning devices are currently of the mechanical type, i.e. are constituted by arms compensated by adjustable springs which, according to their position, interact with friction braking systems which act on the wire being wound.
  • This kind of wire tensioning device has the disadvantage of having very high variability as regards the values of the set adjustment as the speed varies, and furthermore creates a considerable limit to the advancement speed of the wire, beyond which adjustment is no longer practically possible.
  • tensioning devices is constituted by the fact that high deviations of the gram forces occur during the transient periods of acceleration and deceleration of the machine, together with non-uniformity of the set values during work shifts due to the heating of the mechanical braking parts.
  • Adjustments must furthermore be performed with additional tools, without having an immediate automatic control of the cram force values of the wire during the winding steps.
  • electromagnetic braking systems have already been introduced, such as that of GB-A-2137237, which in practice are constituted by a mechanical arm associated with an electronic transducer for sensing the braking gram force of the wire which, though it provides a theoretically correct system, is currently incapable of being sufficiently accurate.
  • the aim of the invention is indeed to solve the above described problems by providing a programmable self-adjusting device for tensioning wires during winding, which allows continuous real-time control of the gram force values, thus allowing in each instance to instantaneously provide the related adjustment, thus obtaining tension values which are always constant and accurate.
  • a particular object of the invention is to provide an automatic device in which all the elements which produce mechanical friction by sliding are eliminated, thus obtaining, besides greater precision in operation, a drastic reduction in maintenance operations.
  • Still another object of the present invention is to provide a self-adjusting device which allows to continuously adjust the set gram forces according to the contingent winding requirements and which furthermore offers considerable repeatability of the results even in different moments and on different machines.
  • Not least object of the present invention is to provide a self-adjusting device which is easily obtainable starting from commonly commercially available elements and materials and which is furthermore competitive from a merely economical point of view.
  • the programmable self-adjusting device according to the invention which can for example be associated with a winding machine but could be connected to other devices, has a box-like containment casing generally indicated by the reference numeral 1.
  • the device according to the invention has, in the direction of advancement of the wire 2 to be wound, a pre-braking element 3 associated with the lower part of the body 1 which has the function of creating a force which is sufficient to tighten the loop of wire around a brake pulley indicated by 4 which is rotatably supported by the casing 1 and is connected to a constant-torque electromagnetic hysteresis rotating brake 5; the wire is wound on the brake pulley 4 for at least-an angle of 360° or possibly for a greater angle.
  • the wire 2 winds on a transmission roller 7 which has its axis perpendicular to the axis of the pulley 4 and is supported by a compensating arm 10 which will be described in greater detail hereinafter.
  • the wire 2 engages a wire tension sensing unit 11 which is constituted by an entry abutment roller 12 and by an bit abutment roller 13 which have their axes mutually spaced and parallel, between which a feeler roller 14 is provided; the roller 14 is supported by a support 15 which acts on a load cell, generally indicated by the reference numeral 16, which has the function of continuously sensing the tension on the wire 2.
  • the load cell 16 is connected to a control unit, generally indicated by 20, advantageously of the electronic type, on which the braking values of the hysteresis rotating brake 5 can be set.
  • the control unit 20 handles the signals arriving from the load cell 16 so as to modulate the braking of the brake 5 in accordance with the occurrence of transient phenomena.
  • the control unit 20 thus ensures perfect control between the signals generated by the load cell 16, which performs the measurements of the actual gram force of the wire 2, and the drive of the brake 5 which is preset to give the required gram force both in dynamic conditions, i.e. during the winding process, and in static conditions, i.e. the minimum assured residual gram force at the end of the winding process.
  • the compensating arm 10 is also operatively associated with the control unit 20 and has the function of keeping the wire 2 tensioned when the winding machine is stopped, or of tensioning or de-tensioning the wire 2 according to the requirements.
  • the compensating arm which has been previously generally indicated by the reference numeral 10, has a rod 51 which supports the transmission roller 7 and is connected to a hub 52 on which a feeler piston 53 is eccentrically articulated and interacts with an elastic adjustment unit generally indicated by the reference numeral 54.
  • the elastic adjustment unit 54 has a containment body 55 with a cavity 56 in which a biasing piston 57, on which the piston 53 acts, is slidable.
  • a pusher spring 58 accommodated in the cavity 56 acts on the biasing piston 57 and can be adjusted by means of a slider 60 which engages around a threaded pin 61 which is rotatable so as to move the slider 60.
  • the threaded pin 61 is rotated by means of an electric motor 65 connected, by means of a toothed belt 66, to a small pinion 67 which is keyed on the threaded pin 61 so as to rotate said pin and consequently move the slider 60 to set the elastic adjustment of the spring 58.
  • a second spring 70 is furthermore provided and is arranged operatively in series with respect to the first spring 58 and is used for greater setting values.
  • An encoder 80 is furthermore connected to the hub 52 and constantly senses the position of the compensating arm, thus allowing its precise control.
  • the compensating arm 10, as described, has the advantage that it can be adjusted automatically, by varying the setting of the adjustment values, even during the steps of unreeling the wire 2 for winding.
  • the wire 2 which is pre-tensioned by the pre-braking device 3, winds onto the brake pulley 4 and, after passing on the transmission roller 7, engages the tension sensing unit 11 which, by continuously controlling the actual tension on the wire at the exit of the device, allows to drive the brake pulley 5 so as to have, even during transient instants, always the same tension on the wire 2 regardless of the operating speed of the machine and of any unevenness of the wire.
  • the compensating arm 10 has in practice the auxiliary function of keeping the wire 2 tensioned when the machine is at rest, so as to prevent it from disengaging from the brake pulley 5, and furthermore has the function of creating further variations if a further tensioning or de-tensioning of the wire is required during the winding steps.
  • the invention achieves the proposed aim and objects, and in particular the fact is stressed that the use of an electromagnetic hysteresis brake 5 driven directly by a unit 11 which senses the tension of the wire 2 at the exit, allows first of all to always have an extremely precise adjustment of the tension and secondly not to be subject to wear and maintenance.

Landscapes

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

Claims (6)

  1. Programmierbares selbst nachstellendes Gerät zum Spannen von Drähten während des Wickelns, enthaltend in der Bewegungsrichtung eines zu wickelnden Drahtes (2), ein Vorbremsgerät (3) zum Spannen des auf einer Bremsrolle (4) aufgewickelten Drahtes (2), der an einer Drahtspannungsabfühleinheit (11) angreift, die mit einer Steuereinheit (20) verbunden ist, die die Bremsrolle (4) treibt, dadurch gekennzeichnet, daß das Gerät weiterhin eine von einem Kompensierarm (10) gehalterte Übertragungsrolle (7) aufweist, die in Bewegungsrichtung hinter der Bremsrolle (4) angeordnet ist, wobei der Draht am Ausgang von der Übertragungsrolle (7) an der Drahtspannungsabfühleinheit (11) angreift, und daß der Kompensierarm (10) eine Stange (51) aufweist, die die Übertragungsrolle (7) haltert und von einer Nabe (52) abragt, an der ein Abfühlkolben (53) exzentrisch angelenkt ist und durch Berührung auf eine elastische Einstelleinheit (54) wirkt, die einen Körper (55) umfaßt, der einen Hohlraum (56) definiert, in dem ein Kolben (57) gleitbar ist, an dem der Abfühlkolben (53) durch Berührung angreift, wobei die elastische Einstelleinheit (54) weiterhin eine erste auf den Kolben (57) wirkende und an ihrem anderen Ende einem Schieber (60) zugeordnete Feder (58) aufweist, wobei der Schieber (60) durch die Wirkung eines Gewindezapfens (61) bewegbar ist, der durch die Wirkung eines Elektromotors (65) drehbar ist, der mit der Steuereinheit (20) wirkverbunden ist, und daß das Gerät weiterhin eine zweite Feder (70) enthält, die koaxial zu der ersten Feder (58) in der elastischen Einstelleinheit (54) angeordnet ist und in Reihe mit der ersten Feder (58) wirkt.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß die Bremsrolle (54) einer elektromagnetischen Hysterese-Drehbremse (5) mit konstantem Drehmoment zugeordnet ist.
  3. Gerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Drahtspannungsabfühleinheit (11) eine Eingangsanlagerolle (12) und eine Ausgangsanlagerolle (13), die parallel zueinander einen Abstand aufweisen, und eine zwischen den Anlagerollen (11, 12) wirkende Abfühlrolle (14) aufweist, die von einer Halterung (15) gehaltert ist, die mit einer Lastzelle (16) verbunden ist, die mit der die Bremsrolle (4) treibende Steuereinheit (20) verbunden ist.
  4. Gerät nach Anspruch 3, dadurch gekennzeichnet, daß es der Steuereinheit (20) zugeordnete Mittel zum Einstellen der geforderten Drahtspannungswerte enthält.
  5. Gerät nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Drahtspannungsabfühleinheit (11) dem Kompensierarm (10) zum Spannen oder Verringern der Spannung des Drahtes (2) betriebsmäßig zugeordnet ist.
  6. Gerät nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Drahtspannungsabfühleinheit (11) dem Kompensierarm (10) betriebsmäßig zugeordnet ist, um den Draht gespannt zu halten, wenn das Gerät angehalten wird.
EP90119693A 1989-10-25 1990-10-15 Programmierbare Vorrichtung zum automatischen Einstellen der Zugspannung beim Wickeln von Drähten Expired - Lifetime EP0424770B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02212489A IT1237491B (it) 1989-10-25 1989-10-25 Dispositivo autoregolante programmabile per il tensionamento di fili durante la bobinatura
IT2212489 1989-10-25

Publications (3)

Publication Number Publication Date
EP0424770A2 EP0424770A2 (de) 1991-05-02
EP0424770A3 EP0424770A3 (en) 1992-04-29
EP0424770B1 true EP0424770B1 (de) 1995-09-06

Family

ID=11191854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119693A Expired - Lifetime EP0424770B1 (de) 1989-10-25 1990-10-15 Programmierbare Vorrichtung zum automatischen Einstellen der Zugspannung beim Wickeln von Drähten

Country Status (3)

Country Link
EP (1) EP0424770B1 (de)
DE (1) DE69022160T2 (de)
IT (1) IT1237491B (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536981B1 (de) * 1991-10-07 1996-06-19 Globe Products Inc. Verfahren und Vorrichtung für die Überwachung und Steuerung einer Ankerwickelmaschine mit einer Detektion vermisster Haken
DE4137016C2 (de) * 1991-11-11 1996-02-22 Agie Ag Fuer Ind Elektronik Vorrichtung zum Messen und/oder Regeln der Zugkraft einer band- oder drahtförmigen Elektrode bei einer Funkenerosionsmaschine
US5310124A (en) * 1992-04-29 1994-05-10 Axis Usa, Inc. Wire tensioner with program controlled bidirectional pulley wheel
EP1137018A1 (de) * 2000-03-23 2001-09-26 Sipro S.R.L. Vorrichtung zur Bildung von Strängen aus dünnen Metalldrähten
DE102004020465B3 (de) * 2004-04-26 2005-09-01 Aumann Gmbh Drahtzugregler für Wickelmaschinen
DE102005028053B3 (de) * 2005-06-16 2006-12-28 Aumann Gmbh Verfahren und Vorrichtung zur Regelung der Drahtspannung eines Spulenwickeldrahtes
ITMI20111983A1 (it) 2011-11-02 2013-05-03 Btsr Int Spa Dispositivo alimentatore positivo per alimentare a tensione costante fili metallici
ITMI20112091A1 (it) 2011-11-17 2013-05-18 Btsr Int Spa Alimentatore di filo, del tipo ad accumulo e con freno magnetico
ITMI20112267A1 (it) 2011-12-15 2013-06-16 Btsr Int Spa Dispositivo di alimentazione di filo ad una macchina tessile
ITMI20112369A1 (it) 2011-12-23 2013-06-24 Btsr Int Spa Metodo e dispositivo ad accumulo di filato per alimentare un filo senza creare torsioni dello stesso
ITMI20112414A1 (it) 2011-12-28 2013-06-29 Btsr Int Spa Sistema e metodo perfezionati per alimentare a tensione costante fili metallici
ITMI20122185A1 (it) 2012-12-20 2014-06-21 Btsr Int Spa Metodo e dispositivo per alimentare a tensione ed a quantita' costante un filo metallico ad una macchina operatrice
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.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113746A (en) * 1961-12-29 1963-12-10 Western Electric Co Strand tension control apparatus
US3797775A (en) * 1973-02-01 1974-03-19 E White Strand tension control
JPS59182167A (ja) * 1983-03-29 1984-10-16 Tanatsuku Eng Kk マグネツトテンシヨン装置
DE3536363A1 (de) * 1985-10-09 1987-04-09 Siemens Ag Wickelmaschine zum herstellen elektrischer spulen

Also Published As

Publication number Publication date
DE69022160T2 (de) 1996-02-15
EP0424770A2 (de) 1991-05-02
IT8922124A1 (it) 1991-04-25
IT1237491B (it) 1993-06-08
IT8922124A0 (it) 1989-10-25
DE69022160D1 (de) 1995-10-12
EP0424770A3 (en) 1992-04-29

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