EP0036444A2 - Procédé pour la fabrication de commutateurs par façonnage à froid - Google Patents

Procédé pour la fabrication de commutateurs par façonnage à froid Download PDF

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Publication number
EP0036444A2
EP0036444A2 EP80107080A EP80107080A EP0036444A2 EP 0036444 A2 EP0036444 A2 EP 0036444A2 EP 80107080 A EP80107080 A EP 80107080A EP 80107080 A EP80107080 A EP 80107080A EP 0036444 A2 EP0036444 A2 EP 0036444A2
Authority
EP
European Patent Office
Prior art keywords
grooves
longitudinal
longitudinal grooves
groove
shrinking
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
EP80107080A
Other languages
German (de)
English (en)
Other versions
EP0036444B1 (fr
EP0036444A3 (en
Inventor
Joze Potocnik
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.)
KOLEKTOR PO
Original Assignee
KOLEKTOR PO
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 KOLEKTOR PO filed Critical KOLEKTOR PO
Priority to AT80107080T priority Critical patent/ATE10315T1/de
Publication of EP0036444A2 publication Critical patent/EP0036444A2/fr
Publication of EP0036444A3 publication Critical patent/EP0036444A3/de
Application granted granted Critical
Publication of EP0036444B1 publication Critical patent/EP0036444B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49799—Providing transitory integral holding or handling portion

Definitions

  • the invention relates to a method for producing press commutators, in which longitudinal grooves are worked into the inner circumferential surface of a hollow cylindrical copper body in an arrangement corresponding to the lamella division, the width of which is measured in the circumferential direction being reduced by a subsequent radial shrinkage of the copper body.
  • Methods of this type are predominantly used in the production of press commutators with a large copper usable height and solid solder ring, as are required, for example, for automotive starter motors.
  • the invention is therefore based on the object to provide a method for the production of press commutators which is also suitable for blanks with a solder ring and which allows close tolerances with respect to the division of the commutator and the insulation width between the fins to be maintained without difficulty, even if the commutator is one has a large usable copper height.
  • a longitudinal groove is worked into the outer circumferential surface of each future lamella, which is separated from one another by the internal longitudinal grooves, with a depth which results in an at least approximately the same radial distance of its groove base from the longitudinal axis of the copper body as it did the bottom of the groove of the internal longitudinal grooves has this longitudinal axis, and a circumferential offset with respect to the adjacent internal longitudinal groove, which results in a ridge breaking between the two longitudinal grooves during the subsequent shrinking, and a width which is equal to the reduction in the subsequent shrinkage Width of each internal longitudinal groove.
  • the extent of the reduction in the width of the inner longitudinal grooves can be determined by the groove width of the outer longitudinal grooves with narrow tolerances, which also avoids division errors and also the final width of the inner longitudinal grooves, which corresponds to the width of the insulation of the finished commutator, can be maintained with tight tolerances.
  • the blank produced by the method according to the invention can be further processed in a known manner.
  • NEN split after the shrinking on the lamellae holding members and after pressing with the insulating molding compound the lamellae are separated from each other by turning off the commutator according to the depth of the original outer longitudinal grooves.
  • the copper body can also be produced in a known manner.
  • rings which have been formed by rolling a band can also be used.
  • the internal longitudinal grooves are preferably arranged so that the joint lies radially outside one of these longitudinal grooves.
  • each of the parts of the material closing the outer longitudinal grooves are firmly connected by friction welding to the lamella having this longitudinal groove.
  • a connection of these material parts with the associated lamellae has the advantage that the blank does not have to be held together by a barrel ring until it is inserted into the tool for pressing out with the insulating molding compound.
  • longitudinal grooves 3 are worked into the inner surface by means of a star-shaped stamp in the extrusion process, all of which are parallel to and parallel to one another Longitudinal axis of the copper body 1 lie and are arranged according to the desired division of the commutator to be manufactured.
  • the depth of the longitudinal grooves 3 is chosen so that the distance of their groove base 3 'from the outer surface of the copper body 1 is equal to the thickness of the layer to be twisted off after pressing with an insulating molding compound.
  • the groove depth thus corresponds to the radial height of the lamellae 4 formed by the longitudinal grooves 3 in the finished commutator.
  • the width of the longitudinal grooves 3 measured in the circumferential direction is greater than the width of the insulation of the finished commutator, that is to say greater than the distance of two adjacent lamellae of the finished commutator measured in the circumferential direction.
  • Radial grooves 5 are also machined into the end face of the flange 2 facing away from the cylindrical part of the copper body 1, namely in an extension of the longitudinal grooves 3. The arrangement of the radial grooves 5 therefore corresponds to the division of the commutator. As shown in Fig. 1, the depth of the radial grooves 5 is chosen so that the distance of their groove base from the other end face of the flange 2 is equal to the thickness of the layer to be turned later.
  • Longitudinal grooves 6 are worked into the outer lateral surface of the copper body 1 by means of extrusion, namely in the same number as the inner longitudinal grooves 3.
  • the depth of the outer longitudinal grooves 6 is equal to the thickness of the layer to be turned later. Therefore, the groove base of the outer grooves 6 lies in the cylindrical surface defined by the groove base 3 'of the inner longitudinal grooves 3.
  • the width of the longitudinal grooves 6 measured in the circumferential direction is equal to the extent to which the width of the internal longitudinal grooves 3 must be reduced by a later shrinking of the copper body 1.
  • the difference between the width of a longitudinal groove 3 and a longitudinal groove 6 is therefore equal to the width of the insulation of the finished commutator. How particular.
  • the outer longitudinal grooves 6 are offset in relation to the inner longitudinal grooves 3 in the circumferential direction, all in the same sense and the same extent.
  • a web 7 is present between the groove base 3 'of each longitudinal groove 3 and the groove base of the adjacent longitudinal groove 6, the width of which is measured in the circumferential direction is selected such that when the copper body 1 subsequently shrinks, it is roughly defined by the groove base 3' Cylinder surface breaks.
  • the width of the webs 7 is somewhat less than the width of the external grooves 6.
  • the copper body 1 is inserted into a shrinking tool which, as shown in FIGS. 3a, 3b and 4a, 4b, has a support star 11 which is guided longitudinally displaceably in a bushing 10.
  • the support star 11 has a number of strips 12 corresponding to the number of longitudinal grooves 3 and aligned with this in its end section which can be inserted into the copper body 1.
  • the strips 12 are, as shown in Fig. 3a, 3b, profiled so that they can engage a bit in the longitudinal grooves 3 and abut their flanks when the copper body 1 has been shrunk to the correct size.
  • the shrinking tool Concentrically around the support star 11, the shrinking tool has pressure pieces 13 arranged radially displaceably in a number corresponding to the number of strips 12. These pressure pieces, which, as shown in Fig. 4a, 4b, are profiled so that they can be applied simultaneously to the outer surface of the cylindrical part of the copper body 1 and to the outer surface of the flange 2, press each of the fins 4 in the radial direction against the Tragstern 11, as can be seen in Fig. 3b. Since the circumference of the copper body 1 is inevitably reduced during this radial movement, the webs 7 and 9 break off, as shown in FIGS. 3b and 5, in that through the groove base of the longitudinal grooves 3 and 6 or radial grooves 5 and 9 defined area.
  • the width of the longitudinal grooves 3 and the radial grooves 5 decreases to the final value, since a further reduction in the circumference and thus a further reduction in the width of the grooves 3 and 5 is no longer possible if the bridges 14 and 15 have completely filled the grooves 6 and 8 and come into contact with the remaining groove flank.
  • the copper body 1 is again a rigid body.
  • the support star 11 is now pulled out of the copper body 1, which is supported on a bushing 10 and a holding part of the shrinking tool receiving it.
  • the shrunk copper body 1 can then be stored without a barrel ring or the like until it is pressed out with an insulating molding compound.
  • anchoring hooks are formed on the inside of the slats 4 before they are pressed out by splitting, which significantly improve the connection of the slats to the molding compound.
  • the cylindrical part of the copper body pers 1 and the flange 2 turned until the bridges 14 and 15 are removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press Drives And Press Lines (AREA)
  • Push-Button Switches (AREA)
EP80107080A 1980-03-24 1980-11-15 Procédé pour la fabrication de commutateurs par façonnage à froid Expired EP0036444B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107080T ATE10315T1 (de) 1980-03-24 1980-11-15 Verfahren zur herstellung von formpresskommutatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
YU00817/80A YU81780A (en) 1980-03-24 1980-03-24 Method of producing a cast in commutator
YU817/80 1980-03-24

Publications (3)

Publication Number Publication Date
EP0036444A2 true EP0036444A2 (fr) 1981-09-30
EP0036444A3 EP0036444A3 (en) 1981-11-11
EP0036444B1 EP0036444B1 (fr) 1984-11-14

Family

ID=25551553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107080A Expired EP0036444B1 (fr) 1980-03-24 1980-11-15 Procédé pour la fabrication de commutateurs par façonnage à froid

Country Status (14)

Country Link
US (1) US4370799A (fr)
EP (1) EP0036444B1 (fr)
JP (1) JPS56133954A (fr)
AT (1) ATE10315T1 (fr)
BG (1) BG32120A3 (fr)
DD (1) DD155126A5 (fr)
DE (1) DE3069641D1 (fr)
DK (1) DK147562C (fr)
ES (1) ES8202198A1 (fr)
HU (1) HU182241B (fr)
PL (1) PL137637B1 (fr)
RO (1) RO78997A (fr)
SU (1) SU1041023A3 (fr)
YU (1) YU81780A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201027A1 (de) * 1982-01-15 1983-07-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum herstellen eines kommutatorringes fuer einen kommutator
EP0111688A3 (en) * 1982-11-23 1986-07-16 Robert Bosch Gmbh Method of manufacturing a commutator ring for a commutator
WO2010009959A3 (fr) * 2008-07-25 2010-06-03 Robert Bosch Gmbh Collecteur pour machine électrique et système

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333335A1 (de) * 1983-09-15 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum herstellen einer zwischenstufe fuer einen kommutatorsegmentring
DE102013207887A1 (de) * 2013-04-30 2014-10-30 Robert Bosch Gmbh Verfahren zur Herstellung eines Kollektors für eine Kommutierungseinrichtung
CN104874714B (zh) * 2015-04-24 2016-06-01 浙江东瑞机械工业有限公司 一种换向片制作方法
CN104759569B (zh) * 2015-04-24 2016-06-15 浙江东瑞机械工业有限公司 换向片制作方法
CN106734736A (zh) * 2015-11-24 2017-05-31 宁波胜克换向器有限公司 一种将换向器钩脚压制呈圆角的压合模具

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE961910C (de) * 1954-12-31 1957-04-11 Bosch Gmbh Robert Verfahren zum Herstellen eines Stromwenders aus einem ringfoermigen Werkstueck
JPS4837761B1 (fr) * 1969-06-13 1973-11-13
DE2028857C3 (fr) * 1969-06-13 1975-05-28 Hitachi Ltd., Tokio

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201027A1 (de) * 1982-01-15 1983-07-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum herstellen eines kommutatorringes fuer einen kommutator
EP0111688A3 (en) * 1982-11-23 1986-07-16 Robert Bosch Gmbh Method of manufacturing a commutator ring for a commutator
US4698902A (en) * 1982-11-23 1987-10-13 Robert Bosch Gmbh Method of making commutator rings
WO2010009959A3 (fr) * 2008-07-25 2010-06-03 Robert Bosch Gmbh Collecteur pour machine électrique et système

Also Published As

Publication number Publication date
PL229183A1 (fr) 1981-10-30
EP0036444B1 (fr) 1984-11-14
RO78997A (fr) 1982-06-25
US4370799A (en) 1983-02-01
DK487180A (da) 1981-09-25
SU1041023A3 (ru) 1983-09-07
EP0036444A3 (en) 1981-11-11
DE3069641D1 (en) 1984-12-20
YU81780A (en) 1982-10-31
DK147562B (da) 1984-10-01
ES498388A0 (es) 1982-01-01
HU182241B (en) 1983-12-28
DK147562C (da) 1985-03-04
DD155126A5 (de) 1982-05-12
BG32120A3 (en) 1982-05-14
JPS56133954A (en) 1981-10-20
ES8202198A1 (es) 1982-01-01
PL137637B1 (en) 1986-07-31
ATE10315T1 (de) 1984-11-15

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