EP0007186A1 - Procédés de fabrication de commutateurs, et commutateur fabriqué selon ces procédés - Google Patents
Procédés de fabrication de commutateurs, et commutateur fabriqué selon ces procédés Download PDFInfo
- Publication number
- EP0007186A1 EP0007186A1 EP79301189A EP79301189A EP0007186A1 EP 0007186 A1 EP0007186 A1 EP 0007186A1 EP 79301189 A EP79301189 A EP 79301189A EP 79301189 A EP79301189 A EP 79301189A EP 0007186 A1 EP0007186 A1 EP 0007186A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ridges
- strip
- ring
- commutator
- channels
- 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.)
- Withdrawn
Links
Images
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
Definitions
- This invention relates to methods of manufacturing commutators for electric motors and generators.
- a commutator consists of a plurality of segments of electrically conductive material and electrically insulating material arranged alternately around the surface of a cylinder. At one time it was normal practice to manufacture a commutator from separate segments of copper and mica. However, it is now more usual, at least in the case of relatively small motors and generators, to produce a ring of electrically conductive material, to embed the ring in insulating material by a moulding process, and thereafter to cut the ring into the required number of segments.
- the ring is produced from a strip of copper or similar electrically conductive material which is then broached to form a plurality of channels extending parallel to the axis of the ring and facing radially inwards. It is to be understood that, after the ring has been embedded in the electrically insulating material, the bases of the channels are cut away so that the commutator segments are formed by the ridges which remain between the channels.
- the broaching operation referred to above involves the removal of a considerable amount of copper from the ring and, accordingly, it is an object of the present invention to provide a modified process in which this removal of copper is avoided.
- the invention consists in a method of manufacturing a commutator for an electric motor or generator from a strip of electrically conductive material having a longitudinally extending marginal portion thinner than the remainder of the strip, including the following steps:-
- a method in accordance with the invention differs from known methods of manufacturing commutators primarily in that the broaching operation carried out on the copper ring is replaced by an operation carried out on the copper while it is still in the form of a flat strip.
- the invention consists in a method of manufacturing a commutator for an electric motor or generator, including the step of forming a plurality of parallel transverse channels separated by ridges in a flat strip of electrically conductive material.
- the channels and ridges are formed by a coining operation .
- the strip of electrically conductive material is placed in a press provided with a tool having a plurality of parallel ridges separated by channels.
- the tool causes material in the strip to flow from the regions in contact with the ridges of the tool into the intervening channels of the tool, thus forming said series of parallel channels separated by ridges in the strip.
- the slots in the marginal portion of the strip are produced by a piercing operation, and the deformation of the ends of the ridges is carried out by a skiving operation.
- the three steps of coining, piercing and skiving are carried out successively in a multiple press.
- the blank illustrated in Figure 1 includes a main portion 1, a relatively thin marginal portion 2, and an intermediate portion 3 having a thickness between that of the portions 1 and 2.
- the blank is cut from a continuous strip of copper which is extruded to the shape shown in Figure 1.
- the blank illustrated in Figure 1 is subjected to a coining operation in a press provided with a tool having a plurality of parallel ridges separated by channels.
- the tool causes material in the strip to flow from the regions in contact with the ridges of the tool into the intervening channels of the tool, thus forming a series of parallel channels 4, as shown in Figure 2, separated by upstanding ridges 5.
- end port ons 6 and 7 ( Figure 3) are trimmed from the blank and slots 8 are formed by a piercing operation in the marginal and intermediate portions 2 and 3 of the blank.
- This piercing operation forms a plurality of tabs 9, each of which is aligned with a respective one of the ridges 5.
- the ends of the ridges 5 are deformed by means of a skiving operation.
- This operation may be a single skiving operation to produce a blank as illustrated in Figures 4 and 4a in which the ends of the ridges are shown bent upwardly at 10 and 11.
- Altemativefy the operation may be a double skiving operation to produce not only the upturned ends 10 and 11, but also two further curved portions 12 and 13 as shown in Figure 4b.
- the blank illustrated in Figure 4 is bent by means of a suitable tool to form a ring as shown in Figure 5. It will be seen that the trimmed ends of the blank meet along a line 19.
- the trimming operation referred to is carried out in such a way that, after the ring has been formed, the spacing between adjacent tabs 9 on each side of the line 19 is identical with the spacing between the remaining tabs 9.
- the ring is then transferred to a mould in which synthetic resin insulating material is introduced into the interior of the ring as shown at 14 in Figure 6. It will be seen that the ridges 5 and, in particular, the upturned ends 10 and 11 are embedded in the insulating material. Thus these parts form a key to lock the ring to the insulating material 14.
- the ring is placed in a lathe or similar tool and, if necessary, skimme, to ensure that the outer surface of the ring 16 is coaxial with the axis of rotation which is indicated at 15.
- the tabs 9 are bent over as shown in Figure 7 to provide terminals for connection of the armature winding when the commutator has been mounted on the armature.
- slots 17 are cut through the ring between the ridges 5 which are now embedded in the insulating material 14. It will be understood that the slots 17 extend right through the base of the channels 4 so that separate commutator segments 18 are formed by the ridges 5 and the remaining material of the portion 1 below each ridge. It will also be understood that each one of these segments will be integral with a respective one of the tabs 9. Finally, it will be understood that one of the slots 17 will embrace the line 19 between the ends of the trimmed blank.
- the process described is suitable for production of commutators for relatively small electric motors and generators.
- a modified form of this process can also be applied to larger commutators.
- the commutator could be formed from three or more portions.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
- Manufacture Of Motors, Generators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2917378 | 1978-07-07 | ||
GB7829173 | 1978-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0007186A1 true EP0007186A1 (fr) | 1980-01-23 |
Family
ID=10498311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79301189A Withdrawn EP0007186A1 (fr) | 1978-07-07 | 1979-06-20 | Procédés de fabrication de commutateurs, et commutateur fabriqué selon ces procédés |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0007186A1 (fr) |
ES (1) | ES482126A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0019472A2 (fr) * | 1979-05-18 | 1980-11-26 | FRANKLIN & FREEMAN (LONDON) LIMITED | Fabrication de coquilles de collecteurs pour machines électriques tournantes |
FR2513823A1 (fr) * | 1981-09-29 | 1983-04-01 | Kolektor P O | Piece semi-finie de collecteur |
JP2003009472A (ja) * | 2001-06-22 | 2003-01-10 | Asmo Co Ltd | 整流子、回転電機の電機子、及び整流子形成用板材の製造方法 |
DE102005030454A1 (de) * | 2005-06-28 | 2007-01-04 | Kolektor Group D.O.O. | Leiterrohling für einen Trommelkommutator, Verfahren zur Herstellung eines solchen sowie Trommelkommutator |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH359479A (de) * | 1957-08-09 | 1962-01-15 | Bosch Gmbh Robert | Rollkollektor für elektrische Maschinen |
GB1080652A (en) * | 1964-04-03 | 1967-08-23 | Bosch Gmbh Robert | Improvements in and relating to commutators |
US3492519A (en) * | 1967-09-11 | 1970-01-27 | Kirkwood Commutator Corp | Commutator and commutator blank for dynamoelectric machines and method of making same |
DE1955122A1 (de) * | 1969-11-03 | 1971-05-13 | Kautt & Bux Ohg | Verfahren zur Herstellung eines Profilbandes fuer die Fertigung von Kommutatoren |
US3902241A (en) * | 1973-06-06 | 1975-09-02 | Krautt & Bux A G Fa | Method of manufacturing pressed material commutators |
FR2339277A1 (fr) * | 1976-01-20 | 1977-08-19 | Kautt & Bux Kg | Collecteur et procede utilise pour sa fabrication |
-
1979
- 1979-06-20 EP EP79301189A patent/EP0007186A1/fr not_active Withdrawn
- 1979-07-03 ES ES482126A patent/ES482126A1/es not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH359479A (de) * | 1957-08-09 | 1962-01-15 | Bosch Gmbh Robert | Rollkollektor für elektrische Maschinen |
GB1080652A (en) * | 1964-04-03 | 1967-08-23 | Bosch Gmbh Robert | Improvements in and relating to commutators |
US3492519A (en) * | 1967-09-11 | 1970-01-27 | Kirkwood Commutator Corp | Commutator and commutator blank for dynamoelectric machines and method of making same |
DE1955122A1 (de) * | 1969-11-03 | 1971-05-13 | Kautt & Bux Ohg | Verfahren zur Herstellung eines Profilbandes fuer die Fertigung von Kommutatoren |
US3902241A (en) * | 1973-06-06 | 1975-09-02 | Krautt & Bux A G Fa | Method of manufacturing pressed material commutators |
FR2339277A1 (fr) * | 1976-01-20 | 1977-08-19 | Kautt & Bux Kg | Collecteur et procede utilise pour sa fabrication |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0019472A2 (fr) * | 1979-05-18 | 1980-11-26 | FRANKLIN & FREEMAN (LONDON) LIMITED | Fabrication de coquilles de collecteurs pour machines électriques tournantes |
EP0019472A3 (fr) * | 1979-05-18 | 1981-01-07 | Franklin & Freeman London Ltd | Fabrication de coquilles de collecteurs pour machines électriques tournantes. |
FR2513823A1 (fr) * | 1981-09-29 | 1983-04-01 | Kolektor P O | Piece semi-finie de collecteur |
JP2003009472A (ja) * | 2001-06-22 | 2003-01-10 | Asmo Co Ltd | 整流子、回転電機の電機子、及び整流子形成用板材の製造方法 |
JP4545352B2 (ja) * | 2001-06-22 | 2010-09-15 | アスモ株式会社 | 整流子形成用板材の製造方法 |
DE102005030454A1 (de) * | 2005-06-28 | 2007-01-04 | Kolektor Group D.O.O. | Leiterrohling für einen Trommelkommutator, Verfahren zur Herstellung eines solchen sowie Trommelkommutator |
Also Published As
Publication number | Publication date |
---|---|
ES482126A1 (es) | 1980-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4287446A (en) | Stator for stepper motor | |
US3466745A (en) | Method of making laminated bus bar assembly | |
GB2060476A (en) | Method and apparatus for production of electrical contacts with crimp connections | |
EP0200367B1 (fr) | Méthode pour connecter un conducteur d'un induit à une encoche d'un commutateur | |
US4442316A (en) | Crimp connector for electrical wires | |
US2188423A (en) | Method of making a commutator | |
US3140414A (en) | Commutators | |
US1994062A (en) | Method of making commutators, and blanks for use therein | |
EP0007186A1 (fr) | Procédés de fabrication de commutateurs, et commutateur fabriqué selon ces procédés | |
US2696658A (en) | Method of manufacturing electric machine commutators | |
US2038419A (en) | Blank and method for making commutators | |
GB2024667A (en) | Manufacture of commutators | |
US3925881A (en) | Method of making a face commutator | |
US3005920A (en) | Commutator for dynamo electric machines and manufacturing method | |
US1592326A (en) | Commutator | |
US3251120A (en) | Method of making a commutator | |
US2348511A (en) | Commutator and process of manufacture | |
US2953698A (en) | Commutator for dynamo-electric machines and method of manufacturing | |
US1738166A (en) | Method of making armatures | |
US1578793A (en) | Commutator and the method of making it | |
EP0019472B1 (fr) | Fabrication de coquilles de collecteurs pour machines électriques tournantes | |
US2934663A (en) | Commutator and process of manufacturing the same | |
US4453102A (en) | Commutator for flat motor | |
JP6936113B2 (ja) | コイル用導線の加工装置 | |
JP3543387B2 (ja) | 回転電機の整流子およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): BE DE FR IT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19801029 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GAYWOOD, ALBERT JAMES |