US3817295A - Method of winding coils - Google Patents

Method of winding coils Download PDF

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Publication number
US3817295A
US3817295A US00318976A US31897672A US3817295A US 3817295 A US3817295 A US 3817295A US 00318976 A US00318976 A US 00318976A US 31897672 A US31897672 A US 31897672A US 3817295 A US3817295 A US 3817295A
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United States
Prior art keywords
axis
supports
winding
winding head
coils
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Expired - Lifetime
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US00318976A
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English (en)
Inventor
G Barrera
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Pavesi Srl
Officine Meccaniche Pavesi and C SpA
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Officine Meccaniche Pavesi and C SpA
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Assigned to OFFICINE MECCANICHE PAVESI S.R.L. reassignment OFFICINE MECCANICHE PAVESI S.R.L. MERGER (SEE DOCUMENT FOR DETAILS). MARCH 2, 1990 TORINO Assignors: OFFICINE MECCANICHE PAVESI E C. S.P.A.
Assigned to OFFICINE MECCANICHE PAVESI & C. S.P.A. reassignment OFFICINE MECCANICHE PAVESI & C. S.P.A. MERGER (SEE DOCUMENT FOR DETAILS). MAY 14, 1990, TORINO Assignors: MECBAR S.P.A.
Assigned to PAVESI S.R.L. reassignment PAVESI S.R.L. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). MAY 24, 1990 Assignors: OFFICINE MECCANICHE PAVESI S.R.L.
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H02K15/0435—Wound windings
    • H02K15/0442—Loop windings

Definitions

  • the present invention relates to a method of winding coils, and particularly to the winding of coils of insulated metal wire for the stators of electric motors.
  • coils of this type are formed by winding the wire over suitable formers, after which the coil thus produced is inserted into the stator either manually or by machine; in the lattercase the coils must be conveniently arranged in layers in such a manner that the thickness of the layers is less than that of the spaces between the rods of the inserting device.
  • Stratification of the coils into layers is normally obtained during winding on the formers; in general fixed formers are preferred upon which the coils are formed by a winding device, since such a system allows a relatively rapid transfer of the coils on to the insertion equipment.
  • various types of formers are used, these may be constituted by a single body or by a plurality of peripheral rods which correspond to the shape of the winding former; these are provided with control mechanisms in order to slacken the coils, or a device capable of taking the coils from the former itself to transfer them to the inserting equipment.
  • the winding device In order to separate the coils on the former into one or more layers it is possible to move the winding device by a predetermined pitch as the winding proceeds, or alternatively the device may remain fixed and the turns which are formed on the coils may be moved axially by means of a device, which advances the turns themselves with respect to the former.
  • An improvement in winding operations can be obtained by a system described in Italian Patent 852,287 which utilises a stepped former the longitudinal profile of which is calculated so that the successive turns of a coil slip naturally from it to pass either on to a loading device having a plurality of segments, capable of receiving a whole layer of coils of a multipolar stator, or directly on to the inserting device of an automatic machine; in thefirst case, once the loadingdevice has been used, it can be extracted from the machine, and may be used subsequently for manual or automatic transfer of the remaining coils on to the inserting device.
  • the initial winding tension causes a shortening of the last turns of the last coil of the immediately preceding pole, and therefore it is necessary to provide automatic intermediate locking of the wire thereby requiring the addition of a suitable arrangement which also requires operating time; alternatively it would be possible to arrange to maintain the coils on the support device in tension, by adding a supplementary plate provided with tension supports for the various coils for each pole.
  • One object of the present invention is to provide a method of winding coils in which the disadvantages set out above are reduced or eliminated, but which retains the advantages of simplicity and universality of the natural stratification system.
  • Another object of the present invention is to dispense with the former thus obtaining various economic and technical advantages.
  • a further object of the invention is to provide a winding procedure in which dead times are reduced, therebynotably increasing production even when utilising only the same winding speed as has been used hithertofore.
  • Yet another object of this invention is to reduce the length of the connection wires between one pole and the next, and to adopt smaller rotation radii of the winding head.
  • Yet a further object of the invention is to provide a winding procedure which allows a substantial simplification of the equipment necessary for its performance.
  • a method of winding coils for the stator of an electric motor comprises the steps of providing a winding guide carried by a rotatable winding head, providing adjacent the winding head a support arrangement comprising at least one array of parallel elongate first supports projecting from a baseplate, each support being of a different length from the adjacent support, and providing at least one array of elongate second supports parallel to the said array of first supports, each second support being of different length from the adjacent second support, the two arrays being arranged so that the first supports and the second supports form a plurality of coaxial groups the ends of each group of supports lying in the same plane and delimiting the shape of a former for respective coils, the axis of the support arrangement forming an angle with the axis of rotation of the winding head which is greater than the angle of friction between the wire and the supports, winding the turns of the coil on a selected group of supports by rotation of the winding head about the said axis thereof, in
  • the present invention also comprehends a support arrangement for a coil winding machine having a winding head rotatable about a first axis, the support arrangement comprising at least one array of parallel elongate first supports projecting from a mounting plate, and at least one array of elongate second supports, the two arrays of supports forming a plurality of coaxial groups of supports, the supports of any one group having such a length that the ends of the group lie in a plane which, when the support arrangement is in an operative position with respect to the winding head lies substantially perpendicular to the axis of rotation thereof.
  • FIG. 1 is a diagrammatic side elevation view of one embodiment of the invention on which a method of winding coils according to the present invention can be performed;
  • FIG. 3 is a diagrammatic plan view of a second embodiment of the invention.
  • FIG. 4 is a partial transverse section, on an enlarged scale, taken on the line IV-IV of FIG. 3;
  • FIG. 5 is a partial diagrammatic plan view of a third embodiment of the invention.
  • FIG. 6 is a diagrammatic side view of a fourth embodiment of the invention.
  • FIG. 8 is a diagrammatic side view of another embodiment of the invention.
  • FIG. 9 is a further embodiment of the invention.
  • FIGS. 1 and 2 there is shown an insulated metal wire 1 which is to be used for the formation of a coil on a support device 6 by a rotating winding head having a pulley 2 carried by a winding guide 3, upstanding from a rotating plate 4; the winding head rotates about a horizontal axis X X.
  • a support device generally indicated 6 which comprises a plate 14 rotatable about a central axis Y Y, which forms an angle a with the axis X X of rotation of the mandrel, which is greater than the angle of friction between the turns of the wire 1 and the metal bodies with which the wire comes into contact.
  • a first series of parallel supports in the form of rods 8 which in the embodiment illustrated in FIG. 1 form part of a support device 6 comprising a circular plate 7 and two arrays of supports 8, 9.
  • Each rod of the two arrays is of different length from the adjacent supports and the supports are arranged in coaxial groups in such manner that the straight line joining the ends of the supports of any one group lie in a plane orthogonal to the axis of winding X X.
  • the array of supports 9 may be formed as a series of rods 9 or as a series of segments 21a, 21b, 21c, as shown in the embodiment of FIG. 5, shaped as the profiles of the coils and positioned so as to guide the wire in the corresponding channels between the rods 8, which are of greater length.
  • the rods 8 could also be replaced by any other suitable supports for receiving the successive coils of each pole in order to transport them to the inserting equipment in the correct relative positions.
  • the plate 14 there are located a number of further plates 12, each of which carries an array of second supports in the form of rods or studs 10 which assist in defining the various coils; the number of plates 12 is the same as the number of the poles of the stator.
  • the rods or studs 10 have lateral projections 11 at the ends thereof which are shaped with a curved surface smoothly joining the surface of the rod.
  • the straight line joining the free ends of the studs 10 is contained in a vertical plane.
  • the heads of the rods 10 could be replaced by a profiled stepped form fixed to the winding mandrel, although such an arrangement is generally less satisfactory than the one described because it complicates the equipment.
  • the studs or rods 10 may be replaced by laminations of suitable form, such as the laminations 19a, 19b shown in FIGS. 3 and 4 having a sloping or curved profile.
  • laminations of suitable form, such as the laminations 19a, 19b shown in FIGS. 3 and 4 having a sloping or curved profile.
  • Each plate 12 carrying the rods 10 of the peripheral array thereof is pivotally mounted on a transverse shaft 13 and is held in position by a spring biased stud l6 and a rigid stud 17 which is adapted to co-operate with a profiled cam 18. This allows for slackening of the coils wound on the rods 10 to allow extraction of the support device when the coils have been positioned on a stator.
  • Guiding pins 20a, 20b may be set in a position suitable for determining the correct shape of the various coils S1, S2, S3
  • the support device 6 may be formed as an inserting device 22 of an automatic machine 22, as shown in FIGS. 6 and 7; in a case such as this it is preferable to use profiled laminations 21 as the supports for guiding the coils, these are arranged between the parallel rods 23 which themselves are formed with an asymmetric cross section.
  • FIG. 8 illustrates a coil winding machine for winding a complete series of poles by the method of the present invention.
  • This machine comprises a base 25 supporting a winding head 26 which is adjustable in height, and a divider 29 with a vertical axis (Z Z) carrying two sets of support devices 5, 5' rotatable about an inclined axis Y Y.
  • the winding head 26 comprises a winding mandrel 27 rotatable in a sleeve 28 which is axially movable in increments at any selected pitch. Control of the rotation of the mandrel is achieved either by means of electrical control or, alternatively, by hydraulic control, which is arranged to stop the rotation after a predetermined number of turns, and is manually adjustable to effect slowing or stopping of the rotation should this be necessary.
  • Control of the incremental advance may be effected by any mechanical, pneumatic or hydraulic control arrangement by means of which the successive steps are fixed.
  • the axis X X 'of rotation of the mandrel is arranged horizontally and forms an angle a with the axis Y Y of the equipment 5, 5.
  • the divider 29 which rotates about the vertical axis Z Z is positioned so that each receiving apparatus 5 or 5' is alternately moved to a position adjacent the winding head.
  • Each support device is of the type described above and the particular configuration determines the type of stator or winding to be formed.
  • the general arrangement of the machine described may be changed by having a different number of winding heads, or a different number of support devices.
  • FIG. 9 Another possible arrangement of the machine is illustrated in FIG. 9, in which the support device is replaced by the inserting equipment 22 and 22', carried on a plate 30 which is rotatable about an inclined axis Z Z which forms an angle a with the axis X X of rotation of the winding head 26.
  • the axis X X lies at a small angle to the vertical.
  • the winding operation effected by machine as described above can be effected as follows; the end of the wire to be wound is held by any automatic or manual system.
  • the winding head 4 which carries the guide 3 advances along the axis X X until the wire delivered from the pulley 2 is located in a plane Al which is orthogonal to the axis of rotation 'X X, after which the winding head begins to rotate about the axis X X until it completes a predetermined number of revolutions.
  • the successive turns of wire wound in the plane Al will slide naturally along the rods 8 on which they are wound until they lie in the plane A normal to the axis of the rods 8 of the support device 6, engaging the rods 8a thereof and the auxiliary rods a which project from the plate 12.
  • the first coil S1 is formed with substantially parallel turns as the tension of each successive turn will draw the preceding turn to move parallel to the plane A due to the inclination between the axis of the equipment and the winding axis.
  • the winding head 4 When all the coils of the pole have been wound the winding head 4 is stopped in a predetermined position and the support device is rotated about the axis Y Y by an angle corresponding to the angle of the required phase difference between the poles. The winding head then recommences to turn, but this time in the opposite direction of rotation to that of the preceding pole, and a fresh winding cycle is commenced, beginning at the winding plane A4 of the last formed coil. In the same manner the process will continue for all the subsequent poles connected in series so as to form a complete set of poles. If the winding is effected upon a machine of the type illustrated in FIG.
  • the divider 29 will rotate about its vertical axis Z Z to bring a second support device 5' into alignment with the winding head 4 to be wound as described above and the support device 5 which carries the coils wound up to this point is removed so as to transfer the coils on to inserting equipment (not shown).
  • a support arrangement comprising a support arrangement for a coil winding machine of the type having a winding head rotatable about a first axis, said support arrangement comprising a mounting plate at least one array of substantially parallel elongate first supports projecting from said mounting plate,
  • the two arrays of supports forming a plurality of coaxial groups of supports the supports of any one group of which are each of such a length that the ends thereof delimit the shape of a former of a respective coil and lie in a plane which, when said support arrangement is in an operative position with respect to said winding head, lies substantially perpendicular to said first axis of rotation, the axis of said support arrangement forming an angle with respect to said first axis which is greater than the angle of friction between said wire and said first and second supports,

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
US00318976A 1972-05-17 1972-12-27 Method of winding coils Expired - Lifetime US3817295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT68549/72A IT958900B (it) 1972-05-17 1972-05-17 Procedimento per la formatura di matasse per statori di motori elet trici e dispositivo per l attuazio ne del procedimento

Publications (1)

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US3817295A true US3817295A (en) 1974-06-18

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Application Number Title Priority Date Filing Date
US00318976A Expired - Lifetime US3817295A (en) 1972-05-17 1972-12-27 Method of winding coils

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US (1) US3817295A (US07223432-20070529-C00017.png)
JP (1) JPS5631821B2 (US07223432-20070529-C00017.png)
DE (1) DE2302192C3 (US07223432-20070529-C00017.png)
FR (1) FR2184585B3 (US07223432-20070529-C00017.png)
GB (1) GB1421626A (US07223432-20070529-C00017.png)
IT (1) IT958900B (US07223432-20070529-C00017.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000896A1 (de) * 1979-01-12 1980-07-17 Hitachi Ltd Spulenwickel- und -einsetzmaschine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1021543A (en) * 1974-05-28 1977-11-29 Patrick L. Grawcock Apparatus and method for forming circular dynamoelectric machine field windings by pushing
JPS529802A (en) * 1975-07-11 1977-01-25 Matsushita Electric Ind Co Ltd Winding frame for coil winding machine
DE2933146A1 (de) * 1979-08-16 1981-02-26 Pleuger Unterwasserpumpen Gmbh Verfahren und vorrichtung zur herstellung von statorspulen
JPS6445491A (en) * 1987-08-12 1989-02-17 Kobukuro Iron Works Co Ltd Moving machine for coke oven

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331403A (en) * 1964-07-23 1967-07-18 Eltra Corp Stator coil winding and positioning machine
US3538959A (en) * 1968-12-13 1970-11-10 Fort Wayne Tool & Die Inc Apparatus for winding multiturn,single layer coils
US3672040A (en) * 1970-06-01 1972-06-27 Gen Electric Method of developing coils of a coil group for a magnetic core
US3734145A (en) * 1967-05-22 1973-05-22 Essex International Inc Apparatus for forming concentric,multiturn,nested dynamoelectric machine field coils

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3481372A (en) * 1967-05-22 1969-12-02 Fort Wayne Tool & Die Inc Coil forming method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331403A (en) * 1964-07-23 1967-07-18 Eltra Corp Stator coil winding and positioning machine
US3734145A (en) * 1967-05-22 1973-05-22 Essex International Inc Apparatus for forming concentric,multiturn,nested dynamoelectric machine field coils
US3538959A (en) * 1968-12-13 1970-11-10 Fort Wayne Tool & Die Inc Apparatus for winding multiturn,single layer coils
US3672040A (en) * 1970-06-01 1972-06-27 Gen Electric Method of developing coils of a coil group for a magnetic core

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000896A1 (de) * 1979-01-12 1980-07-17 Hitachi Ltd Spulenwickel- und -einsetzmaschine

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Publication number Publication date
DE2302192C3 (de) 1981-05-27
DE2302192A1 (de) 1973-11-29
JPS4925401A (US07223432-20070529-C00017.png) 1974-03-06
GB1421626A (en) 1976-01-21
DE2302192B2 (de) 1980-10-02
FR2184585B3 (US07223432-20070529-C00017.png) 1976-01-30
JPS5631821B2 (US07223432-20070529-C00017.png) 1981-07-23
IT958900B (it) 1973-10-30
FR2184585A1 (US07223432-20070529-C00017.png) 1973-12-28

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Legal Events

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AS Assignment

Owner name: OFFICINE MECCANICHE PAVESI & C. S.P.A.

Free format text: MERGER;ASSIGNOR:MECBAR S.P.A.;REEL/FRAME:005437/0856

Effective date: 19730926

Owner name: PAVESI S.R.L.

Free format text: CHANGE OF NAME;ASSIGNOR:OFFICINE MECCANICHE PAVESI S.R.L.;REEL/FRAME:005437/0873

Effective date: 19891004

Owner name: OFFICINE MECCANICHE PAVESI S.R.L.

Free format text: MERGER;ASSIGNOR:OFFICINE MECCANICHE PAVESI E C. S.P.A.;REEL/FRAME:005437/0863

Effective date: 19891215