EP0137957A1 - Procédé pour fabriquer un étage intermédiaire pour un cône mobile de lame de collecteur - Google Patents

Procédé pour fabriquer un étage intermédiaire pour un cône mobile de lame de collecteur Download PDF

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Publication number
EP0137957A1
EP0137957A1 EP84109726A EP84109726A EP0137957A1 EP 0137957 A1 EP0137957 A1 EP 0137957A1 EP 84109726 A EP84109726 A EP 84109726A EP 84109726 A EP84109726 A EP 84109726A EP 0137957 A1 EP0137957 A1 EP 0137957A1
Authority
EP
European Patent Office
Prior art keywords
forming
intermediate stage
longitudinal axis
flange
ring
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
EP84109726A
Other languages
German (de)
English (en)
Other versions
EP0137957B1 (fr
Inventor
Fritz Prof. Dr.-Ing. Dohmann
Peter Franz
Friedrich Dipl.-Ing. Klaas
Günter Schulze
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0137957A1 publication Critical patent/EP0137957A1/fr
Application granted granted Critical
Publication of EP0137957B1 publication Critical patent/EP0137957B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles
    • B21K23/04—Making other articles flanged articles
    • 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

Definitions

  • the invention is based on a method for producing a commutator segment ring according to the preamble of the main claim.
  • a method is already known in which bevels are formed at the ends of a straight workpiece and the workpiece is formed into an annular blank with ends lying opposite one another and forming a gap.
  • the blank is placed in a forming tool, aligned with one of the teeth of an inner die forming the segment partial grooves, and formed into a commutator segment ring with a plurality of axial inner ribs forming commutator segments and a flange at one end.
  • the inner ribs remain connected by narrow webs that curve outwards.
  • the gap in the blank should run along a web.
  • the inventive method with the characterizing features of the main claim has the advantage that the blank without a positioning groove forming tapered ends, which include a gap, is first formed into an intermediate step with a hollow cylindrical shaft and flange at one end, the flange already having the height and the shaft received approximately the length of the later commutator segment ring.
  • Simple means are provided on the forming tool, with which a groove is formed at least on the shaft of the intermediate stage and the material flow is guided in such a way that the gap of the intermediate stage runs within the groove in a plane which extends radially through the longitudinal axis of the intermediate stage.
  • the measures listed in the subclaims are advantageous developments of the main claim specified procedure possible.
  • the means provided for guiding the material flow are particularly advantageously designed as a rib on at least part of the forming tool with which the groove is formed.
  • anchoring means for the later commutator segments can advantageously be integrally formed in the insulating material hub on the end face of the flange.
  • FIG. 1 shows a material section and FIG. 2 shows a blank bent from the material section, each in a spatial representation.
  • Figures 3 to 10 an intermediate stage with modifications and Figure 11 a forming tool with an intermediate stage at the end of the forming process, each in longitudinal section.
  • the ends of the material section lie opposite each other and enclose a gap in the form of a butt joint 3.
  • the material section 1 can have a rectangular or round cross section.
  • An intermediate stage 4 for a commutator segment ring is formed from the blank 2 in a forming tool (FIGS. 3 to 10).
  • the intermediate stage 4 has a sleeve-shaped shaft 5 and at one end a flange 6. Also an intermediate stage without a flange or a disk-shaped one An intermediate stage for a flat commutator segment ring can be produced from the "open blank 2" using a correspondingly modified forming tool.
  • the forming tool for backward hollow extrusion presses (FIG. 11) has a lower punch plate 7 with a die 8.
  • a bore 9 is formed in the die 8, which is continued in the lower punch plate 7 and in which a hollow punch-shaped ejector 10 is movably guided.
  • the ejector 10 sits when the blank 2 is inserted and during the forming to the intermediate stage 4 on the bottom 11 of the bore 9 and is displaceable by a plunger 12.
  • the ejector 10 is provided with a longitudinal bore 13 in which an inner punch 14 is movably received.
  • the cylindrical inner punch 14 also sits on the bottom 11 of the bore 9 when the blank 2 is inserted and is provided with a stroke-limiting stop 15.
  • a forming stamp 17 is fixedly arranged in a stamping plate 16 of the forming tool and can be moved with the stamping plate 16.
  • the forming die 17 has a sleeve-shaped end section 18 which can be moved into the die 8 as an extrusion die.
  • a counter-punch 20 is guided so as to be longitudinally movable and can be moved towards the lower die plate 7 relative to the shaping die 17 and the upper die plate 16 by a die 21 movably arranged in the upper die plate 16.
  • the counter-stamp 20 serves as a counterhold at the end of the shaft 5 of the intermediate stage 4 to be formed.
  • the hollow-cylindrical end section 22 of the counter-stamp 20 enables the cross section of the intermediate to be fully formed stage 4 at the end of the shaft 5, because its inner diameter can be made somewhat larger than the outer diameter of the inner die 14 and allows a small amount of material to escape into the annular gap between the dies.
  • the counter-stamp 20 can serve as an additional ejector if the intermediate stage 4 should get caught on the forming stamp 17, 18.
  • a plunger 23 in the form of a screw with which the end position of the counter-punch 20 in the forming die 17 and the upper die plate 16 can be adjusted.
  • the plunger head also serves as an upper stop to limit the movement of the inner punch 14.
  • the butt joint 3 When shaping the blank 2 into the intermediate stage 4, the butt joint 3 must be maintained as a straight gap which runs parallel to the longitudinal axis of the intermediate stage 4 in a plane extending radially through the longitudinal axis. Only then can a commutator ring be formed from the intermediate stage 4 in a subsequent method known per se and not shown in detail, in which the gap runs only in one segment partial groove and does not escape into the adjacent segments. Simple means are therefore provided on the forming tool to direct the material flow during the forming of the blank 2 into the intermediate stage 4. At least on the shaft 5 of the intermediate stage 4, they form a groove in which the gap runs.
  • a longitudinal groove 24 is formed in the inner jacket 25, in which the gap 3 runs.
  • the inner stamp 14 of the order For this purpose, the tool has a longitudinal rib 26 on the jacket.
  • the ejector 10 and the counter-punch 20 are provided with a corresponding longitudinal groove 27 and 28, respectively.
  • the longitudinal groove 24 is continued in a radial groove 29 on the end face 30 of the flange 6.
  • the ejector 10 is provided on its end face with a radial rib 31 which runs in the same radial plane through the longitudinal axis of the intermediate stage 4 and thus of the forming tool as the longitudinal rib 26 of the inner punch 14.
  • the gap 3 in the flange 6 thus runs in the radial groove 29 .
  • a longitudinal groove 32 is formed on the outer jacket 33 in the intermediate stage 4.
  • the end section 18 of the forming die 17 is provided with a longitudinal rib 34.
  • a longitudinal groove 35 is provided in the counter-punch 20.
  • the longitudinal groove 32 is continued in a radial groove 36 on the rear side 37 of the flange 6, in which the gap 3 runs in the flange 6.
  • the end section 18 of the forming die 17 is provided on its end face with a rib 38 which adjoins the longitudinal rib 34 radially.
  • a longitudinal groove 24 and 32 are each formed on the shaft 5.
  • the forming tool is provided with the inner punch 14 with longitudinal rib 26 and the forming punch 17, 18 Longitudinal rib 34 equipped.
  • the grooves 24, 29 and 32, 36 are formed in combination. Other combinations of the grooves are also possible.
  • the intermediate stage 4 is provided with an annular groove 39 on the end face 30 of the flange 6.
  • the ejector 10 of the forming tool is provided with a corresponding annular projection 40 on its end face for shaping the annular groove 39.
  • FIG. 10 A modification of the intermediate stage 4 according to FIG. 9 is shown in FIG. 10.
  • An annular extension 41 is formed on the end face 30 of the flange 6.
  • the ejector 10 of the forming tool is provided with an enlarged end section 42 of the longitudinal bore 13 for producing the extension 41.
  • annular groove 39 and the extension 41 already form additional anchoring means of the segments which are formed on the intermediate stage 4 and which result from a commutator segment ring to be produced in a subsequent method.
  • An insulating material hub in which the segments of the commutator are anchored, lies with a collar on the end face 30 of the later segments and engages with a clamp in the annular groove 39 or around the extension 41.
  • the blank 2 is inserted into the opened forming tool and aligned.
  • the upper stamp plate 16 with the forming stamp 17 and the counter stamp 20 is lifted off the lower stamp plate 7 with the die 8, ejector 10 and inner stamp 14, so that the end section 18 of the forming stamp 17 is at a sufficient height above the top, that is Receiving surface 43 of the die 8 stands.
  • the end faces of the forming die 17, 18 and counter-die 20 lie in one plane.
  • the inner die 14 and the ejector 10 are on the bottom 11 of the bore 9 in the die 8 and the lower die plate 7.
  • the blank 2 is pushed over the inner die 14 onto the ejector 10, the butt joint 3 the blank 2 on the longitudinal rib 26 of the inner die 14 aligns.
  • alignment means known per se and not shown in detail are provided.
  • the upper stamp plate 16 is now lowered until the end section 18 of the forming stamp 17 with the counter-stamp 20 rests on the blank 2.
  • the forming die 17, 18 is then pressed onto the blank 2, so that the intermediate stage 4 is formed by backward hollow extrusion.
  • the forming die 17, 18 forms the flange 6 at the level of the commutator segment ring to be produced later from the intermediate stage 4 in a manner known per se.
  • the material of the blank 2 which escapes into the hollow-cylindrical space enclosed by the inner punch 14, end section 18 and counter-punch 20 is shaped into the shaft 5.
  • the length of the shaft 5 is determined by the under the influence of an opposing force acting on the stamp 21 counter stamp 20 determined.
  • the inner die 14, which is freely movable in the ejector 10, is entrained in the shank 5 and thus in the forming die 17, 18 when the shank 5 is formed by the friction forces occurring between the inner die 14 and the shank 5, and forms the longitudinal groove 24 with its longitudinal rib 26.
  • the material flow is directed through the longitudinal rib 26 in such a way that the butt joint 3 is expanded into a straight gap which runs in the longitudinal groove 24 parallel to the longitudinal axis of the intermediate stage 4 in a plane extending radially through the longitudinal axis (FIG. 11 with intermediate stage 4 according to FIG 3).
  • the upper stamp plate 16 with the forming stamp 17, 18 is moved back into the starting position.
  • the ejector 10 pushes the intermediate stage 4 from the inner die 14, which returns to its initial position on the bottom 11 of the bore 9 and out of the die 8. If the intermediate stage 4 gets caught in the forming die 17, 18, the counter-die 20 acts as an additional ejector before it is moved back to its original position. After ejection, the ejector 10 also returns to its starting position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Forging (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP84109726A 1983-09-15 1984-08-16 Procédé pour fabriquer un étage intermédiaire pour un cône mobile de lame de collecteur Expired EP0137957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833333335 DE3333335A1 (de) 1983-09-15 1983-09-15 Verfahren zum herstellen einer zwischenstufe fuer einen kommutatorsegmentring
DE3333335 1984-09-15

Publications (2)

Publication Number Publication Date
EP0137957A1 true EP0137957A1 (fr) 1985-04-24
EP0137957B1 EP0137957B1 (fr) 1987-07-29

Family

ID=6209162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109726A Expired EP0137957B1 (fr) 1983-09-15 1984-08-16 Procédé pour fabriquer un étage intermédiaire pour un cône mobile de lame de collecteur

Country Status (4)

Country Link
US (1) US4621514A (fr)
EP (1) EP0137957B1 (fr)
JP (1) JPS6087947A (fr)
DE (2) DE3333335A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585521A1 (fr) * 1985-07-26 1987-01-30 Bruss Respub Nauc Procede de fabrication de collecteurs de machines electriques et collecteurs obtenus par ledit procede
CN106734594A (zh) * 2015-11-24 2017-05-31 宁波胜克换向器有限公司 一种用于压弯换向器钩脚的压制模具

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005446A1 (fr) * 1996-08-05 1998-02-12 Kabushiki Kaisha Kanemitsu Procede de moulage de la partie cylindrique d'une tole metallique portant un perçage central
US6242839B1 (en) 2000-03-01 2001-06-05 Kirkwood Industries, Inc. Commutator and method for manufacturing
DE10107109C2 (de) * 2001-02-14 2003-07-24 Federal Mogul Wiesbaden Gmbh Bundbuchse, Verfahren zu ihrer Herstellung und Biegewerkzeug zur Herstellung von Bunden an einer Buchse
CN100418693C (zh) * 2005-12-20 2008-09-17 浙江长城换向器有限公司 圆柱形换向器的冷挤压式制造方法
DE102006020861B4 (de) * 2006-05-04 2010-08-26 Gesenkschmiede Schneider Gmbh Einstufiges Schmiedeverfahren und Vorrichtung zur Herstellung von buchsenartigen Schmiedeteilen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1376547A (en) * 1972-05-23 1974-12-04 Renault Extrusion of internally toothed articles
EP0085388A1 (fr) * 1982-02-02 1983-08-10 MOTOMAK Motorenbau, Maschinen- und Werkzeugfabrik, Konstruktionen GmbH Procédé de fabrication d'un manchon métallique à partir d'une pièce tubulaire cylindrique
SU1041023A3 (ru) * 1980-03-24 1983-09-07 Колектор П.О. (Инопредприятие) Способ получени полуфабрикатов коллекторов электродвигателей

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585515B2 (ja) * 1974-03-13 1983-01-31 株式会社デンソー カイテンデンキヨウセイリユウシノ セイゾウホウホウ
JPS55141348A (en) * 1979-04-19 1980-11-05 Mitsubishi Steel Mfg Co Ltd Production of product having tooth profile and its apparatus
SU874255A1 (ru) * 1979-05-11 1981-10-23 Краматорский Индустриальный Институт Способ получени полых изделий с фланцем

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1376547A (en) * 1972-05-23 1974-12-04 Renault Extrusion of internally toothed articles
SU1041023A3 (ru) * 1980-03-24 1983-09-07 Колектор П.О. (Инопредприятие) Способ получени полуфабрикатов коллекторов электродвигателей
EP0085388A1 (fr) * 1982-02-02 1983-08-10 MOTOMAK Motorenbau, Maschinen- und Werkzeugfabrik, Konstruktionen GmbH Procédé de fabrication d'un manchon métallique à partir d'une pièce tubulaire cylindrique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585521A1 (fr) * 1985-07-26 1987-01-30 Bruss Respub Nauc Procede de fabrication de collecteurs de machines electriques et collecteurs obtenus par ledit procede
CN106734594A (zh) * 2015-11-24 2017-05-31 宁波胜克换向器有限公司 一种用于压弯换向器钩脚的压制模具

Also Published As

Publication number Publication date
EP0137957B1 (fr) 1987-07-29
DE3333335A1 (de) 1985-03-28
DE3465029D1 (en) 1987-09-03
US4621514A (en) 1986-11-11
JPS6087947A (ja) 1985-05-17

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