EP0102378A1 - A method of manufacturing commutators. - Google Patents
A method of manufacturing commutators.Info
- Publication number
- EP0102378A1 EP0102378A1 EP83900915A EP83900915A EP0102378A1 EP 0102378 A1 EP0102378 A1 EP 0102378A1 EP 83900915 A EP83900915 A EP 83900915A EP 83900915 A EP83900915 A EP 83900915A EP 0102378 A1 EP0102378 A1 EP 0102378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- commutator
- material member
- elements
- plough
- anchoring
- 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
Links
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
- the present invention relates to a method of manufacturing commutators of the type comprising a row of mutually separated commutator elements having an exposed commutator side and an opposite side shaped with integral undercut protruding portions forming anchoring elements, which are secured to a cast commutator body.
- the commutator elements as loose members are laid into a mounting ring to form a cylindrical row of elements, whereafter the assembly is further processed by being provided with the cast commutator body and then cut for the mutual separation of the commutator elements.
- the mounting of the loose commutator elements is a time consuming work, which has proved difficult to automatize, but the achievable quality.of the commutators produced in this manner is very high primarily due to the fact that the anchoring elements may show a high degree of rigidity or stability, when they are formed - in any of several possible manners - on the single commutator elements, these elements basically being cut from a profiled rod of a suitable material, normally copper.
- the invention relates to a commutator manufacturing method of the latter type, i.e. a method whereby the row of commutator elements is produced from an elongate unitary meterial member, which is machined on one side for the shaping of the said- anchoring elements and is thereafter, upon being connected or cast together with said cast commutator body, divided into said row of separate commutator elements by way of transverse cuttings between the consecutive anchoring element carrying portions of the material member.and it is the purpose of the invention to provide such " a method, by which the anchoring elements may be produced in a simple manner and so as to show a high strength, thus enabling the produced commutators to be both cheap and of high quality.
- the mechanical anchoring element forming treatment is carried out as specified in the characterizing clause of claim 1, i.e. by a transverse ploughing up action on or in the relevant surface of the material member, whereby oblique anchor rib portions are formed by the displaced material, and these rib portions will be very ductile and strong, because they emanate from a compression action on the material.
- the preferred material is conventional commutator copper, i.e. practically pure copper, which ⁇ REA
- OMPI preserves or even builds up a high strength when subjected to a cold compression deformation, which will here apply also to the root area of the rib portions.
- anchor ribs When the anchor ribs are produced by means of an undercut sticking and ploughing tool they will be left slanting towards each other, while in a commonly preferred shape of the anchor element two oblique ribs are arranged V-like, i.e. slanting away from each other.
- the ploughing is easily achievable by arranging for the ploughing to be carried out at the places where the material member is later on to be cut transversely for the separation of the commutator elements; hereby the anchor ribs of each element will be constituted by the adjacent ribs of two neighboring ploughing areas, and besides the advantage will be obtained that the separation cutting is carried out in an area, from which a part of the material has been removed by the ploughing action, for the formation of the anchor ribs, i.e. the material waste as connected with the separation cutting will be reduced.
- the ploughing action may be effected in a raised portion of the material member located spaced from the side edges thereof, whereby the resulting commutator elements will be provided with anchoring elements along only a partial length thereof, which is desirable for the longitudinal anchoring of the commutator elements in the cast commutator body.
- the material member may be a straight profile, which is rolled up subsequent to the ploughing treatment, or it may be a cylindrical member, preferably made as a rolled up profile, which is subjected to the ploughing treatment in its cylindrical shape.
- the plough up action may be effected stepwise by means of a single tool, or a multiple tool may be used. It is particularly advantageous to use two opposite multiple tools, which are mutually staggered and forced into the material member simultaneously from both edges thereof, thereby the material member will need no rigid holding means, as the forces applied from both sides will neutralize each other.
- Fig. 1 is a perspective view of a material member from which a row of commutator elements is to be made
- Fig. 2 is a perspective sectional view of the same member and a tool for providing the anchoring elements
- Fig. 3 is a plan vie ' illustrating the action of * the tool shown in Fig. 2,
- Fig " . 4 is an end view of the material member as rolled into a cylindrical shape.
- Fig. 5 is a perspective sectional view of a commutator unit comprising the material member of Fig. 4,
- Fig. 6 is a perspective view of a finished commutator
- - Fig. 7 is a perspective view of a cylindrical material member and two multiple tools for providing the anchoring elements
- Fig. 8 is an end view of the cylindrical material member as subjected, to further treatment.
- the material member shown in Fig. 1 is a copper strip 2, which is profiled, by rolling or otherwise, so as to show a broad base portion 4 and a raised flat portion 6 of reduced width.
- This strip member which may be supplied from a supply reel, is advanced stepwise through the working station as illustrated in Figs. 2 and 3, in which the strip 2 is supported by a carrier sole 8 and is subjected to the transverse action of a ploughing tool 10, the active part of which is an undercut plough shear 12, the front end of which is ground so as to form an undercut ploughing point or edge 14, the front point of which is located in the level of the* planar underside of the plough shear 12.
- the tool 10 is forced laterally against the raised material portion 6 with the surface of the plough shear 12 in level with or slightly spaced from the top side of the broad portion 4 of the strip 2.
- the tool will cause a furrow 16 (Fig. 3) to be ploughed in the material portion 16, because the copper will get forcibly displaced towards the sides of the tool front 14 and flow upwardly along the undercut sides of the plough shear 12, whereby the furrow 16 will be confined between raised anchoring ribs 18 projecting beyond the top level of the profile portion 6.
- the tool 10 When the shear 12 has thus ploughed through the entire profile portion 6 the tool 10 is retracted and the material strip 2 is advanced a step corresponding to the desired pitch between the neighboring commutator elements of the fina . l product, whereafter the tool is reactuated.
- the strip, member 2 will leave the working station with a length profile as shown to the left in Fig. 3, i.e. with the profile portion 6 converted into a row of V-shaped protrusions 20 forming the anchoring elements of the later commutator elements.
- this cylindrical member is designated 24 and its split 26.
- the split 26 is. located idways between two anchoring protrusions 20.
- a rigid body 28, Fig. 5 is produced by casting in the international space of the cylindrical member 24 ' , and, if applicable, about a central bushing 30, whereby the casting of the body 28 will provide for a strong radial holding engagement between the undercut anchoring elements 20 and the casting material.
- OMPI axial anchoring is obtained in that the body 28 is provided with a width broader than that of the raised profile portion 6, i.e. larger than the length of the anchoring elements 20. Thereafter surface grooves 34 (Fig. 5) are cut in the cylindrical body, whereby the commutator cylinder member 24 is devided into a row of mutually insulated commutator elements, each anchored to the body 28 by means of the associated anchoring portion 20. The end portions of these commutator elements as projecting beyond the end of the cast body 28, as shown in Fig.
- a ploughing tool having two or even more active ploughing shears 12, whereby the production speed may be increased.
- the said front end will be liable, due to its inclination, to drive into the profile portion, and for this reason the ploughshear 12 should be mounted on a heavily dimensioned and accurately guided tool carrier 10 (Fig. 2).
- the said diving effect may be reduced by subjecting the material to two or more successive operations, whereby the ploughing cuttings are effected with increasing depth and/or width.
- the length profile of the anchoring portions 20 may in a simple manner be varied by a corresponding variation of the cross profile of the portion 6 at the strip member 2, e.g. for the provision of local breaks of the anchoring portions for an improved axial holding thereof in the cast body 28, just as also the cross profile of the anchoring portions 20 may be varied widely all according to the profilation of the ploughing tool or tools.
- the ploughed up ribs 18 may be further ploughed up, viz. by a subsequent treatment with a ploughing tool as sticking into the sides of the ribs spaced from the bottom surface between the anchoring portions 20.
- a profiled material strip 2 is rolled up into a cylinder 40, which is placed between opposed tools 42 and 44, each of these tools comprising a circular row of ploughing tools 10, 12, 14 projecting from rear carrier members 46.
- these carrier members are connected with means for urging them towards each other, whereby all the ploughing tools 10,12,' 14 are forced into the internally raised portion 6 of the cylinder 40 to effect the said ploughing action thereon.
- the ploughing tools 10, 12 of the opposed tool units 42, 44 are circumferent- ially staggered so as to each fit into the space between two opposed tools 10,12 whereby all the relevant anchoring elements 20 are produceable by one operation of the two multiple tools 42 and 44. Due to the equal number of separate tools 10, 12 ⁇ on these multiple tools the cylindrical member 40 will be influenced by generally equal and oppositely directed 'Sticking forces, whereby the cylindrical member 40 need not be separately supported in the direction of the movements of the multiple tools 42 and 44.
- the anchor elements 20 may be shaped with any of a wide variety of possible shapes, one example being shown in Fig. 8, either by one step operation of correspondingly shaped tools or by successive operation of different tools.
- the shape and the size of the anchor elements may be selected according to the requirements and circumstances, e.g. the type of material used (copper, aluminium or other) .
- the cylindrical member as provided with the anchor elements may be connected with the . insulating commutator body 28 (Fig. 5) either by direct casting out thereof or by insertion into a precost body 28.
- the cylindrical member 40 (Fig. 7) may be a rolled up strip member 2 or an entirely closed ring member produced in any suitable manner.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Un commutateur est fabriqué en usinant transversalement un organe allongé ou cylindrique en cuivre, sur un de ses côtés, afin d'obtenir des éléments de fixation. L'organe en cuivre, enroulé en cylindre, est connecté ensuite à un corps coulé de commutateur et découpé transversalement afin de séparer entre eux les éléments commutateurs. Les éléments de fixation sont obtenus en soumettant l'organe en cuivre à une action de bouvetage, exercée par un bouvet ou jeu de bouvets sous-jacent, ce qui crée des nervures en relief le long des côtés de l'outil. Par ce procédé de fabrication, les nervures de fixation constituées par le déplacement par compression du cuivre présenteront une résistance élevée, le procédé étant applicable même pour la production de commutateurs soumis à des critères élevés de performance.A switch is manufactured by machining an elongated or cylindrical copper member transversely on one of its sides to obtain fasteners. The copper member, wound into a cylinder, is then connected to a cast switch body and cut transversely to separate the switch elements from each other. The fasteners are obtained by subjecting the copper member to a bouvet action, exerted by an underlying bouvet or set of bouvets, which creates raised ribs along the sides of the tool. By this manufacturing process, the fixing ribs formed by the compression displacement of copper will exhibit high strength, the process being applicable even for the production of switches subjected to high performance criteria.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83900915T ATE21192T1 (en) | 1982-03-12 | 1983-03-11 | MANUFACTURING PROCESS FOR COMMUTATORS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK1088/82 | 1982-03-12 | ||
DK108882A DK158803B (en) | 1982-03-12 | 1982-03-12 | PROCEDURE FOR MANUFACTURING COMMUTATORS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0102378A1 true EP0102378A1 (en) | 1984-03-14 |
EP0102378B1 EP0102378B1 (en) | 1986-07-30 |
Family
ID=8100862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83900915A Expired EP0102378B1 (en) | 1982-03-12 | 1983-03-11 | A method of manufacturing commutators |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0102378B1 (en) |
JP (1) | JPS59500393A (en) |
DE (1) | DE3364840D1 (en) |
DK (1) | DK158803B (en) |
ES (1) | ES520856A0 (en) |
IE (1) | IE54519B1 (en) |
IT (1) | IT1160802B (en) |
WO (1) | WO1983003324A1 (en) |
ZA (1) | ZA831642B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2221580B (en) * | 1988-08-04 | 1992-09-23 | Johnson Electric Ind Mfg | A two part commutator assembly for an electric motor |
JP5260867B2 (en) * | 2006-12-15 | 2013-08-14 | 株式会社ミツバ | Commutator, commutator manufacturing mold, and commutator manufacturing method |
CN104979735A (en) * | 2015-07-25 | 2015-10-14 | 薛宜 | Method for manufacturing commutator copper segment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB677779A (en) * | 1949-05-20 | 1952-08-20 | Hoover Ltd | Improvements relating to the manufacture of commutators for dynamo-electric machines |
US3987539A (en) * | 1974-01-31 | 1976-10-26 | Consolidated Foods Corporation | Method of making a molded commutator |
US4216575A (en) * | 1979-02-01 | 1980-08-12 | Noranda Mines Limited | Method of reforming the fins of a finned tube |
GB2049496B (en) * | 1979-05-18 | 1982-10-27 | Franklin & Freeman London Ltd | Manufacturing commutators for electric rotating machines |
YU39889B (en) * | 1981-09-29 | 1985-04-30 | Kolektor | Semi-manufactured commutator for commutaors |
-
1982
- 1982-03-12 DK DK108882A patent/DK158803B/en not_active Application Discontinuation
-
1983
- 1983-03-09 IE IE511/83A patent/IE54519B1/en unknown
- 1983-03-10 ZA ZA831642A patent/ZA831642B/en unknown
- 1983-03-11 EP EP83900915A patent/EP0102378B1/en not_active Expired
- 1983-03-11 ES ES520856A patent/ES520856A0/en active Granted
- 1983-03-11 IT IT20046/83A patent/IT1160802B/en active
- 1983-03-11 DE DE8383900915T patent/DE3364840D1/en not_active Expired
- 1983-03-11 JP JP58501104A patent/JPS59500393A/en active Pending
- 1983-03-11 WO PCT/DK1983/000033 patent/WO1983003324A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO8303324A1 * |
Also Published As
Publication number | Publication date |
---|---|
IT8320046A0 (en) | 1983-03-11 |
DK158803B (en) | 1990-07-16 |
ZA831642B (en) | 1983-11-30 |
DE3364840D1 (en) | 1986-09-04 |
ES8402984A1 (en) | 1984-03-16 |
IE830511L (en) | 1983-09-12 |
IT1160802B (en) | 1987-03-11 |
EP0102378B1 (en) | 1986-07-30 |
WO1983003324A1 (en) | 1983-09-29 |
DK108882A (en) | 1983-09-13 |
ES520856A0 (en) | 1984-03-16 |
JPS59500393A (en) | 1984-03-08 |
IE54519B1 (en) | 1989-11-08 |
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