US3685118A - Wire coil stripper and inserting device - Google Patents

Wire coil stripper and inserting device Download PDF

Info

Publication number
US3685118A
US3685118A US27868A US3685118DA US3685118A US 3685118 A US3685118 A US 3685118A US 27868 A US27868 A US 27868A US 3685118D A US3685118D A US 3685118DA US 3685118 A US3685118 A US 3685118A
Authority
US
United States
Prior art keywords
stripper
coil
coils
elongated members
stator
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
US27868A
Other languages
English (en)
Inventor
Stanley D Payne
Donald E Hill
Robert G Walker
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.)
Advanced Machine and Tool Corp
Original Assignee
Industra Products Inc
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 Industra Products Inc filed Critical Industra Products Inc
Application granted granted Critical
Publication of US3685118A publication Critical patent/US3685118A/en
Anticipated expiration legal-status Critical
Assigned to ADVANCED MACHINE & TOOL CORPORATION reassignment ADVANCED MACHINE & TOOL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INDUSTRA PRODUCTS, INC.
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/06—Embedding prefabricated windings in the machines
    • H02K15/062—Windings in slots; Salient pole windings
    • H02K15/065—Windings consisting of complete sections, e.g. coils or waves
    • H02K15/067—Windings consisting of complete sections, e.g. coils or waves inserted in parallel to the axis of the slots or inter-polar channels
    • H02K15/068—Strippers; Embedding windings by strippers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/53143—Motor or generator

Definitions

  • a third embodiment is a hybrid of the first and second embodiment using the pins in conjunction with a series of ridges and grooves and may additionally be provided with a modified blade alignment tool which serves to distribute the forces somewhat uniformly between the several. pins.
  • ROBERT e WALKER STANLEY D.PAYNE DONALD E. HILL ATTORNEYS PATENTEDAUBZZ m2 3.685; 1 1 a SHEET 3 0F 5 @Wlfi 1 I 1 H L5 I i STA o. PAYNE 4 Y 00w E. HILL mvmons. ROBERT e. WALKER ATTORNEYS :LET5 f PATENTEDwczz m2 sum u 0r 5 INVENTORS. I ROBERT 5. WALKER -;STANLEY 0. PAYNE DONALD E. HILL BY 1 /; ⁇ f; ATTORNEYS PATENTimuszzmrz 3.685.118
  • a TORNEYS WIRE COIL STRIPPER AND INSERTING DEVICE BACKGROUND OF THE INVENTION This invention relates to devices for winding and inserting coils in electric motors and more particularly to an improved stripper for displacing coils from a coil placing device into the stator slots of the motor.
  • Prior art strippers have the major drawback that they allow a shifting or nesting of individual turns within a coil between two blades of a coil placer tool. Within specific ratios of wire diameter to the slot or gap between two placer tooling blades, this condition may prevent, materially hamper, or substantially restrict the number of turns of wire that can besuccessfully inserted into the stator slots.
  • Prior art strippers when processing or inserting wire diameters greater than 55 percent of the gap formed by two blades of the coil placer tool, present two distinct drawbacks due to the allowable shifting or nesting of individual turns of wire within a coil.
  • Wire diameters which fall within the range of 55 to 78 percent of the blade gap constitute a locking condition due to the friction generated by nesting of the turns against the sides of the blades forming the blade gap. This locking condition will materially damage the wire or jam the coil placer. Wire diameters which fall above the 78% range having coils in excess of 30 to 35 turns will experience deformation and damage to the insulation of the turns nearest the stripper due to the accumulated effects of friction.
  • a stripper is provided with vertically extending pins and laterally extending fins.
  • the fins are adapted to extend outwardly into the gap between two adjacent teeth of the stator, thus providing support for the coils at this point.
  • the pins are so shaped and positioned as to hold the turns of the coil in a stacked relationship.
  • the stripper maintains the alignment of and provides support for the coils during the insertion process.
  • the pins are removable from the stripper so that, for example, larger pins might be substituted resulting in a smaller gap between the pins so as to accommodate a coil of smaller wire size, or in the case of a given wire size, to vary the ratio of the constant wire diameter to the blade gap.
  • the second embodiment substitutes a head portion comprising a series of ridges and troughs, the troughs being appropriately shaped so as to hold the turns of a coil in astacked relationship similar to that achieved in the first embodiment.
  • a third embodiment is a hybrid of the first two having a series of ridges and troughs surrounded by'a series of upstanding pins with fins extending outwardly from each gap defined by the pin. This third embodiment may additionally be provided with a modified plate alignment tool which serves to distribute forces experienced by a given pin over the entire set of pins.
  • FIG. 1 is a cross sectional view showing the disadvantages of the prior art stripper
  • FIG. 2 is a perspective view showing one embodiment of the present invention
  • FIG. 3 shows the stripper of FIG. 2, a stator and the coils in proper alignment
  • FIG. 4 is a cross sectional view of the stripper of FIG.
  • FIG. 5 is a partial cross sectional view showing the stripper of FIG. 2 in a coil placing environment
  • FIG. 6 is a top view of an alternate embodiment showing the coils in their proper position
  • FIG. 7 is across section view of the stripper of FIG. 6 taken along 7-7;
  • FIG. 8 is a partial cross sectional view taken along 8-
  • FIG. 9 is a partial cross sectional view taken along 9-
  • FIG. 10 is a top view partially in section showing the combined pin-ridge and trough embodiment
  • FIG. 1 l is a cross sectional view of the stripper of FIG. 10 taken along 11-1 1;
  • FIG. 12 is a cross sectional view taken along 12-12 of FIG. 1 1.
  • FIG. 1 one stage of an automated coil winding and placing process is shown.
  • a stator 1 is shown in place around a series of fingers or blades 2 which tend to hold a series of coils 3 in position during the insertion process.
  • the stator and the fingers are fixed relative to one another and a stripper 4 moves upwardly inside the fingers forcing the coil 3 up and out into the stator slots.
  • This orientation may be maintained by using a stripper having the configuration shown in FIG. 2.
  • the stripper has a series of radially extending fins 7 having edge portions 8 which serve to force the wires outwardly into the stator.
  • the stripper has a contoured head portion having ridges l8 and grooves or troughs 9. The bottom of the trough 9 is seen to form an extension of the edge of the fin 8.
  • a coil is then seen to be supported by the edge of the fin 8 and inside the head portion this same coil will be supported by the base of the trough 9 at the bottom and along its sides by two adjacent ridge portions.
  • the function of this embodiment of the invention is most readily seen in FIG. 3.
  • a stator 1 having teeth 11 and slots 12 is placed on a series of fingers 2. These fingers are the same as those shown in FIG. 1 and serve to hold the coils indicated generally by 13 in position prior to the step of inserting them in the stator slots.
  • a coil 13 is supported along its two sides by the fixed fingers 2 and is supported below by the edge 8 of a corresponding fin on the movable stripper. As we move nearer to the center of the stator, this coil 13 is supported on its two sides by adjacent ridges l8 and corresponding trough 9 both of which move relative to the fingers 2. Hence, in this configuration the only sliding friction which occurs will be between the coils and the finger 2.
  • the fingers 2 are provided with a lip portion 50 which allows the coil to pass by the edge of a tooth 11 on the stator without becoming caught or scratched by the edge of that tooth.
  • the stripper is shown in cross section and is seen to consist of a base portion 14 and a head portion 15.
  • the base portion has radially extending fins 7 and is provided with a threaded hole 16 for attachment to a coil placing device.
  • the head portion is seen to consist of a series of ridges 18 and corresponding troughs 9.
  • the stripper is designed for use with wire of a diameter less than the width of the trough 9, but not less than 78 percent of the width of that trough. This is illustrated in FIG. 5 which shows the stripper holding a series of coils during the insertion process.
  • the stripper is attached to a shaft 17 which shaft forces the stripper upwardly pulling the coils 13 up with it through the bore of a stator 1.
  • the fins 7 maintain the coil outward between two teeth of the stator and into its position in the slots of the stator.
  • the stripper reaches the top of its stroke, it then recedes downwardly leaving the coil in the stator.
  • the shaft 17 begins its upward movement, it will pick up and maintain in a stacked relationship the several turns of each of the coils.
  • the specific coil 22 is confined in the stripper groove 25 and is also confined between the specific fingers 26 and 27 on one hand and between fingers 28 and 29 seen in FIG. 3 on the other hand. Outside of the coil placing device, this coil 22 may take on a disoriented configuration as illustrated generally at 30.
  • the stripper moves up, the several coils are simultaneously forced upwardly and maintained outwardly by the fins 7 into their respective slots in the stator.
  • the gap between two adjacent fingers may be thought of as defining a slot in which a given coil is constrained and a given coil is seen to be constrained by two such slots.
  • the stripper then forms an extension connecting these two slots which is movable with respect to the fingers and the fins associated with those slots cause the coil to move upwardly in the slots.
  • the wedge guides 31 function to insert a protective wedge in each of the stator slots during the insertion of the coils.
  • FIG. 6 illustrates an alternative embodiment of the stripper which functions similarly to the first embodiment.
  • the second embodiment comprises a body portion having a series of vertically extending parallel pins or members 32.
  • FIGS. 3 and 6 A comparison between FIGS. 3 and 6 should serve to illustrate the differences in these two embodiments, but it should be noted that FIG. 6 has deleted'the stator 1 and the fingers 2 of the coil placing tool. An illustrative finger 2 is shown in its proper orientation with respect to the fins in FIG. 8.
  • the vertically extending members or pins 32 may be removably afiixed to the stripper by means such as the dowel pins 33 and 34.
  • These vertically extending members can be made to be removable so that they may be replaced by another set of different dimensions in order to handle various wire sizes.
  • the lower portion 35 where the pin attaches to the base of the stripper would be the same size and shape for various pin sizes.
  • the upper portion 36 would differ for differing sets of pins.
  • interchangeable strippers could be utilized to accommodate various wire sizes. To understand why it is desirable to have these various sizes of pins, one must consider the concept of locking wire size.
  • Such a stripper as illustrated in FIGS. 6 through 9 also eliminates the limit of the number of turns which can be inserted due to accumulated frictional forces as previously described.
  • the vertically extending pins 32 will define a blade gap equal to or less than the blade gap defined by blades 2. This new blade gap will be located in close proximity to the gap formed by the blades 2 which will reduce if not eliminate the nesting conditions within the blade gap formed by blades 2.
  • the pins 32 which are maintaining the position or single file order of the wires are moving with the stripper and wire. Therefore, no sliding action occurs between the wire and pins 32 and therefore no frictional retarding forces are developed which is the limiting factor on the number of turns to be inserted.
  • the astute reader will have realized by this time that while the stripper of FIG. 7 will materially increase the number of turns which may be inserted in a stator at one time it too will have an upper limit to the number to the number of turns which may be inserted can be further extended by using a removable blade alignment tool as is shown in conjunction with the embodiment of FIGS. 10, 11 and 12.
  • FIG. 1 1 another embodiment of the present invention is a hybrid of the stripper shown in FIG. 2 and the one illustrated in FIG. 7.
  • This hybrid stripper has a series of parallel elongated members 38 which correspond to the elongated members 32 of FIG. 7.
  • the stripper of FIG. 11 also has a head portion formed by a series of ridges 37 and corresponding grooves between adjacent ridges and these ridges correspond to the ridges 18 of the embodiment of FIGS. 2 and 4.
  • FIG. 11 also illustrates dummy elongated members 39 which merely serve to properly mate the stripper with the tooling pins 26 and 27 of FIG. 5.
  • FIGS. 1 another embodiment of the present invention is a hybrid of the stripper shown in FIG. 2 and the one illustrated in FIG. 7.
  • This hybrid stripper has a series of parallel elongated members 38 which correspond to the elongated members 32 of FIG. 7.
  • the stripper of FIG. 11 also has a head portion formed by a series of ridges 37 and corresponding
  • the blade alignment tool having a handle 40 to effect its placementand removal on the stripper.
  • the blade alignment tool has a flange 41 which limits its downward travel onto'the stripper and has a contoured portion 42, which mates with the interior surfaces of the pins 38 and in conjunction with those to the contour of the base portion of the stripper.
  • pins 38 again are parallel elongated members which are attached to the base of the stripper in a cantilever fashion so that the upper portions of the pins are free to bend according to the stresses applied to them.
  • the blade alignment tool 40, 41, 42 serves to tie all of these pins together so that any stress applied to one of the pins will be somewhat uniformly distributed over the set of pins and this alignment tool, of course, serves to maintain the separation between adjacent elongated members.
  • the invention is seen to reside in a wire stripper which provides a series of movable slots. These slots serve to maintain the coils in their proper orientation during the process of inserting the coils into a stator. Therefore, while the invention has been described with reference to a particular embodiment, persons skilled in the art will readily recognize that modifications may be made without departing from the spirit of the invention or from the scope of the appended claims. Thus, for example, while the present invention has been illustrated primarily with respect to two pole machines, the embodiment of FIG. 7 would be usable without modification for machines with other numbers of poles.
  • the stripper of FIG. 2 may also be modified so as to be usable with a four'pole stator and of turns which may be handled.
  • an improved stripper for simultaneously driving said coils through the bore of a stator and forcing them radially outward into the stator slots comprising:
  • each of said members being removably positioned on said stripper base radially inwardly of a corresponding fixed elongate member of the machine with;
  • a coil stripper comprising:
  • said base portion having a substantially circular cross section in a first plane
  • said base portion having a plurality of radially extending fins each lying in a plane which is perpendicular to said first plane;
  • said base portion having means associated therewith for attachment to a coil placing device
  • said head portion comprising a plurality of parallel elongated members, each member being disposed on the periphery of a circle, the plane of the circle being parallel to said first plane, said members being so disposed with respect to said fins that a gap formed by two adjacent members forms an extension of the edge of a fin lying in the proximity of said gap.
  • an improved coil stripper for inserting a multiple turn coil in said stator comprising:
  • a base portion and a head portion said base portion having a substantially circular cross section in a first plane and having means associated therewith for attachment to a coil placing device; said head portion also having a plurality of parallel elongated members disposed on the circumference of a circle, the plane of the circle being parallel to said first plane for maintaining the relative orientation of at least some of the individual turns of a coil during the insertion process said elongated members mounted on said head portion each being positioned radially inwardly of a corresponding fixed elongated member on the machine. 4.
  • said elongated members are removabl affixed to said head portion.
  • sai head portion further comprises a portion interior said elongated members which is provided with a plurality of slots which serve to connect specified pairs of gaps.
  • said base portion has a plurality of radially extending fins each lying in a plane which is perpendicular to said first plane, said fins being so disposed that the edge of a fin forms a radially outward extension of the gap between two adjacent elongated members.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
US27868A 1970-04-13 1970-04-13 Wire coil stripper and inserting device Expired - Lifetime US3685118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2786870A 1970-04-13 1970-04-13

Publications (1)

Publication Number Publication Date
US3685118A true US3685118A (en) 1972-08-22

Family

ID=21840231

Family Applications (1)

Application Number Title Priority Date Filing Date
US27868A Expired - Lifetime US3685118A (en) 1970-04-13 1970-04-13 Wire coil stripper and inserting device

Country Status (4)

Country Link
US (1) US3685118A (enrdf_load_stackoverflow)
CA (1) CA954281A (enrdf_load_stackoverflow)
FR (1) FR2089528A5 (enrdf_load_stackoverflow)
GB (1) GB1332835A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815207A (en) * 1972-12-04 1974-06-11 Gen Electric Means for aligning coil injection tooling with a stator core
US3815206A (en) * 1972-12-04 1974-06-11 Gen Electric Wire protecting coil placing method and apparatus
US3818571A (en) * 1973-04-06 1974-06-25 Gen Electric Apparatus for inserting winding turns
US3831641A (en) * 1972-12-04 1974-08-27 Gen Electric Winding inserting apparatus
US3845548A (en) * 1973-10-25 1974-11-05 Gen Electric Apparatus and method for inserting dynamoelectric machine coils
US3879842A (en) * 1974-04-08 1975-04-29 Gen Electric Winding inserting apparatus and method
US3949464A (en) * 1975-01-13 1976-04-13 Industra Products, Inc. Contemporaneous insertion of overlapping coils
US20040068858A1 (en) * 2001-07-31 2004-04-15 Tooru Kuroyanagi Motor manufacturing method
US20050259364A1 (en) * 2004-05-19 2005-11-24 Imation Corp. Thin film servo head apparatus with canted servo gaps

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630183C3 (de) * 1976-07-05 1986-07-31 Otto 7980 Ravensburg Rist Vorrichtung zum Einziehen von Wicklungen in Nuten von Statoren von Elektromotoren
DE3243015C2 (de) * 1982-11-20 1984-11-29 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Verfahren zur Herstellung einer zweipoligen Drehstromwicklung

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815207A (en) * 1972-12-04 1974-06-11 Gen Electric Means for aligning coil injection tooling with a stator core
US3815206A (en) * 1972-12-04 1974-06-11 Gen Electric Wire protecting coil placing method and apparatus
US3831641A (en) * 1972-12-04 1974-08-27 Gen Electric Winding inserting apparatus
US3818571A (en) * 1973-04-06 1974-06-25 Gen Electric Apparatus for inserting winding turns
US3845548A (en) * 1973-10-25 1974-11-05 Gen Electric Apparatus and method for inserting dynamoelectric machine coils
US3879842A (en) * 1974-04-08 1975-04-29 Gen Electric Winding inserting apparatus and method
US3949464A (en) * 1975-01-13 1976-04-13 Industra Products, Inc. Contemporaneous insertion of overlapping coils
US20040068858A1 (en) * 2001-07-31 2004-04-15 Tooru Kuroyanagi Motor manufacturing method
US20040098856A1 (en) * 2001-07-31 2004-05-27 Tooru Kuroyanagi Motor production method and coil insertion apparatus
US7185413B2 (en) * 2001-07-31 2007-03-06 Aisin Aw Co., Ltd. Motor manufacturing method
US20050259364A1 (en) * 2004-05-19 2005-11-24 Imation Corp. Thin film servo head apparatus with canted servo gaps

Also Published As

Publication number Publication date
GB1332835A (en) 1973-10-03
CA954281A (en) 1974-09-10
FR2089528A5 (enrdf_load_stackoverflow) 1972-01-07

Similar Documents

Publication Publication Date Title
US3685118A (en) Wire coil stripper and inserting device
EP0226550B1 (en) Device for inserting prewound coils in the cavities of a stator of a dynamo-electric machine and apparatus using such a device
JP6579685B2 (ja) ステータの製造方法及びその製造装置
US9698643B2 (en) Stator winding for rotary electric machine, stator for rotary electric machine, method of manufacturing stator for rotary electric machine, and jig used in manufacturing stator for rotary electric machine
US10396638B2 (en) Stator manufacturing apparatus and stator manufacturing method
US4276689A (en) Apparatus and method for axial insertion of dynamoelectric machine end turn insulation
US3949464A (en) Contemporaneous insertion of overlapping coils
US3672026A (en) Apparatus for developing wound coils for electromagnetic devices
US4335325A (en) Dynamoelectric machine stator assembly
US3815206A (en) Wire protecting coil placing method and apparatus
US4416058A (en) Apparatus for winding coils and inserting coils and wedges into stator cores
US3748714A (en) Coil insertion device
US3815207A (en) Means for aligning coil injection tooling with a stator core
US4489764A (en) Arrangement for forming and transferring coils for subsequent insertion into a slotted magnetic core
GB2052884A (en) Armature windings for direct current machines and apparatus for mounting windings on armatures
US20090070985A1 (en) Method for winding brushless dc motors
US6282775B1 (en) Methods for injecting stator winding coil groups into a stator core
JPH0642770B2 (ja) 鉄心内に中間絶縁体を配置するための方法及び装置
US4400871A (en) Method for placing prewound coils in stator slots
US3522650A (en) Process for developing wound coils for electromagnetic devices
US4617972A (en) Method and apparatus for winding and inserting coils in a dynamoelectric machine stator core
GB2138718A (en) Stack height adjustment for coil placing machines
US4026009A (en) Apparatus and methods for aligning and placing insulating members in magnetic core slots
KR102636425B1 (ko) 밀림 방지용 지지대가 구비된 코일 인서트 툴
US4739807A (en) Apparatus and method for forming and inserting wave windings into a dynamoelectric machine stator core

Legal Events

Date Code Title Description
AS Assignment

Owner name: ADVANCED MACHINE & TOOL CORPORATION, INDIANA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INDUSTRA PRODUCTS, INC.;REEL/FRAME:005240/0092

Effective date: 19891018