EP0111688B1 - Méthode de fabrication d'une bague de commutateur pour un commutateur - Google Patents

Méthode de fabrication d'une bague de commutateur pour un commutateur Download PDF

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Publication number
EP0111688B1
EP0111688B1 EP19830110670 EP83110670A EP0111688B1 EP 0111688 B1 EP0111688 B1 EP 0111688B1 EP 19830110670 EP19830110670 EP 19830110670 EP 83110670 A EP83110670 A EP 83110670A EP 0111688 B1 EP0111688 B1 EP 0111688B1
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EP
European Patent Office
Prior art keywords
blank
segments
forming punch
commutator
forming
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
EP19830110670
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German (de)
English (en)
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EP0111688A2 (fr
EP0111688A3 (en
Inventor
Werner Bode
Peter Franz
Reiner Hausdorf
Günter Schulze
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP0111688A2 publication Critical patent/EP0111688A2/fr
Publication of EP0111688A3 publication Critical patent/EP0111688A3/de
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Publication of EP0111688B1 publication Critical patent/EP0111688B1/fr
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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

Definitions

  • the invention is based on a method for producing a commutator ring for a commutator according to the preamble of the main claim according to the prior art according to EP-A-0 036 444.
  • a method is already known from DE-C-961 910 in which a commutor ring provided with segment partial grooves is pressed into a hollow cone and thus reduced.
  • the webs between the individual commutator segments can dodge in longitudinal grooves in the hollow cone inner wall, so that they protrude from the running surface of the commutator segments.
  • the bars are removed in a later step to split the segments.
  • EP-A-0 036 444 discloses a method for producing pressurized commutators, according to which the commutator segments of the commutator ring prefabricated with segment partial grooves are pressed radially from the outside with individually operable punches to the commutator axis and are received there by a counter-punch. With such a radial compression of the commutator, irregularities can occur. In addition, considerable parts of the copper are destroyed in the upper area of the lamellae by shearing off the lamella bridges, so that these areas have to be turned off and are lost as an abrasion reserve and for current supply. This process therefore leads to additional material costs and requires powerful tools with relatively short downtimes.
  • the inventive method with the characterizing features of the main claim has the advantage that when reducing the commutator ring including flange, the forming forces act simultaneously on the entire length of the commutator ring including flange, in order to obtain a constant cross-section over the entire commutator segment length, which also means that complete anchoring means are formed is required in the area of the ends of the commutator ring. The entire length of the commutator segments can then be anchored in the insulating body in a manner which prevents them from spinning.
  • the inventive method enables the commutator ring to be reduced with relatively low forming forces, the reduction taking place in one or more stages of the working stroke depending on the difference between the starting and final diameters of the commutator ring.
  • Another advantage is that the inventive method for reshaping the commutator ring requires a relatively short time by including the forward and backward movements of the reshaping and holding parts in the reshaping process from insertion to ejection of the commutator ring.
  • the multi-stage die for shaping the inside of the commutator ring is designed to be divided by means of the inventive method with a graduated working stroke - as an upper and lower die part - one of the die parts ejecting the reshaped commutator ring after opening the reshaping tool.
  • a blank 1 for a commutator ring 2 of a commutator is made of a material suitable for commutators, for example copper.
  • the blank 1 has the shape of a sleeve, at one end of its shaft 3 a flange 4 is formed.
  • the shaft 3 is provided on its inner wall 5 with segmental grooves 6 which are arranged at the same distance from one another and run parallel to the longitudinal axis of the sleeve and which separate the commutator segments 7 from one another except for a web 8 on the outer jacket of the sleeve.
  • the segment grooves 6 are continued in the flange 4 as slots 9.
  • the slots 9 divide the flange 4 in the individual commutator segments 7 associated with connecting lugs 10.
  • the connecting lugs 10 are still connected to one another by webs 11 on the outer edge of the flange 4.
  • the blank 1 is designed, for example, as an extrusion. It has a larger diameter than the commutator ring 2 and is provided with segment partial grooves 6 and slits 9 serving as flag partial grooves of greater width than the finished commutator ring 2 has.
  • the tools for producing the segment grooves 6 and slots 9 of the blank 1 have a longer service life with the larger dimensions. This is particularly important for large-volume production.
  • the shaft 3 and the flange 4 of the blank 1 are reduced in diameter.
  • the reduction is carried out by a method in which the blank 1 is received on a die which has teeth which engage in the segment partial grooves 6. Radially acting on a commutator segment 7 together with the connecting lug 10, pushers push the commutator segments 7 further between the teeth of the die.
  • the webs 8 and 11 bulge outwards and the segment grooves 6 and the slots 9 narrow to the desired dimension of the commutator ring 2.
  • the reduction takes place in a single or multi-stage working stroke with a correspondingly graduated single or multi-part die.
  • dovetail-shaped anchoring means at the inner end of the commutator segments 7 is carried out by a calibration device as a continuation of the working stroke or when the form punch is returned from the blank 1.
  • the form punch is also used to eject the commutator ring 2.
  • the cold forming of the blank 1 into the commutator ring by reduction takes place in a multi-part forming tool in one operation.
  • a first embodiment of the forming tool is shown in Figures 2 to 6.
  • the forming tool has a lower holding plate 12, in which a receptacle 13 for locking pins 14 is arranged.
  • the locking pins 14 are arranged at the same angular distance from one another, which corresponds to the angular distance of the slots 9 in the flange 4 of the blank 1.
  • Sitting on the lower holding plate 12 a bell-shaped pressure plate 15, in which a hollow stamp 16 is arranged.
  • the punch 16 protrudes from the pressure plate 15 with an end designed as a flange 17.
  • the free end face 18 of the flange 17 represents the workpiece holder and thus forms the receiving plane for the blank 1.
  • the pressure plate 15 has a frustoconical coaxial depression 19 on its upper side with an outwardly inclined wall 20.
  • a lower stamp 21 is longitudinally movable and rotatably guided.
  • a lower die part 22 of a split die is attached to receive the blank 1.
  • the lower die part 22 has teeth 23 on its jacket which are at the same angular distance from one another. They are aligned in the axial direction with the securing pins 14 for the slots 9 forming the flag part grooves.
  • the cross section of the teeth 23 has the shape of the segment part grooves 6 of the blank 1 at the end of the first Stage of the working stroke of the forming process.
  • a slide holder 25 is movably arranged in an upper holding plate 24.
  • the slide receptacle 25 is provided on its end face 26 facing the pressure plate 15 with radially extending slots 27 which open into a central bore 28 of the slide receptacle 25.
  • the slots 27 are again formed at the same angular distance from one another and are aligned with the spaces between the locking pins 14 in the lower half of the tool.
  • a slide 29 is movably guided.
  • the outer end of each slide 29 is designed as a widened stop 30 for a spring arrangement 31.
  • the spring arrangement 31 is supported with her the other end on the slide holder 25.
  • the outer end face 32 of the slide 29 is inclined at the same angle as the wall 20 of the recess 19 of the pressure plate 15.
  • the shape of the inner end face 33 of the slide 29 is equal to the outer surface of the commutator segments 7 between the webs 8 connecting them. At the inner edge section the inner end face 33 of the slide 29 is provided with a chamfer 34. The outer edge portion of the inner end face 33 is provided with a shoulder 35 which corresponds to the flange 4 of the blank 1.
  • the slots 27 of the slide holder 25 are covered with an annular plate 36 which is screwed onto the end face 26 of the slide holder 25.
  • an upper punch 37 can be moved longitudinally and rotatably.
  • an upper die part 39 of the divided die is attached on the end face 38 of the upper die 37.
  • the upper die part 39 is provided with teeth 40 in the same way as the lower die part 22.
  • the shape of the teeth 40 corresponds to the shape of the segment grooves 6 at the end of the working stroke (see also FIG. 8).
  • a calibration device is attached to the end face 41 of the upper die part 39 facing the lower die part 22. It consists of a calibration ring 42 which is screwed onto the upper die part 39.
  • the calibration ring 42 has an outer diameter that is larger than the diameter of the tooth base of the upper die part 39.
  • the blank 1 according to FIG. 1 is placed for forming in the commutator ring 2 on the lower die part 22 of the forming tool in the starting position (FIG. 2).
  • the flange 4 then sits on the end face 18 of the hollow punch 16 surrounding the lower punch.
  • the upper punch 37 is retracted from the area of the slider 29 with the upper die part 39 and the clamping ring 42 in the central bore 28 of the slide receptacle 25 .
  • the slider 29 are also pressed by the spring arrangement 31 out of the central bore 28 into their outer position.
  • the slide holder 25 After inserting the blank 1, the slide holder 25 is moved towards the recess 19 of the pressure plate 15 (FIG. 3).
  • the sloping faces 32 of the slides 29 slide on the sloping wall 20 of the depression 19 of the pressure plate 15.
  • the longitudinal movement of the slider receptacle 25 into the depression 19 causes the slides 29 with their inner end faces 33 to be pressed radially onto an associated commutator segment 7.
  • the commutator segments 7 are pressed between the teeth 23 of the lower die part 22, while the webs 8 connecting the commutator segments 7 are curved outwards.
  • the paragraph 35 presses the slider 29 on the edge of the flange 4, so that the webs 11 connecting the connecting lugs 10 are curved outwards.
  • the lower punch 21 with the lower forming part 2 is moved back from the blank 1 into the punch 16, while the upper die 37 moves the upper die part 39 together with the calibration ring 42 relative to the fixed slide receptacle 25 towards the die 16 until the calibration ring 42 is pushed through the blank 1 and the upper die part 39 receives the blank 1 so that the teeth 40 open their entire length engage in the assigned segment partial grooves 6 of the blank 1 (FIG. 4).
  • the slide holder 25 is moved somewhat against the pressure plate 15, so that the slide 29 press the commutator segments 7 further between the teeth 40 of the upper die part 39.
  • This second reduction stage of the working stroke further narrows the segment partial grooves 6 and the slots 9.
  • the blank 1 is reduced in diameter to the dimension for the commutator ring 2, and the segment grooves 6 and slots 9 are also compressed to their width in the commutator ring 2 (FIG. 8 ).
  • the working stroke of the forming tool is also ended.
  • the forming tool remains closed ( Figure 5) while the upper punch 37 is moved back to its starting position. He pulls the upper die part 39 out of the blank 1 and then pulls the calibration ring 42 through the blank 1.
  • the calibration ring 42 presses the inner end 43 of the commutator segments 7 in the circumferential direction in such a way that it is cold-formed as an approximately dovetail-shaped anchoring 44 (FIG. 9 ).
  • the slide holder 25 is also moved back into the starting position (FIG. 6).
  • the spring arrangement 31 also pushes the slide 29 outwards into its starting position.
  • the lower punch 21 is also advanced into its starting position in the punch 16.
  • the lower stamp 21 with the lower form stamp part 22 acts as an ejector for the commutator ring 2, in which the lower form stamp part 22 presses against the end face of the flange 4 and lifts the commutator ring 2 from the end face 18 of the stamp 16 serving as a workpiece support.
  • the commutator ring 2 can now be removed in a manner known per se and not shown in more detail and can be provided with an insulating material hub in which the commutator segments 7 are anchored with their dovetail-shaped ends 44. In a manner which is also known per se and not shown in more detail, the commutator segments 7 are then separated from one another by removing the webs 8 and 11 and 10 flag slots are formed in the connecting lugs, and the commutator is thus completed.
  • FIG. 10 A second exemplary embodiment of the forming tool is shown in FIG. 10. As far as the parts are the same as those of the first embodiment, they have the same reference numerals.
  • the forming tool in turn has a divided two-stage reduction stamp. However, the slides are arranged in the lower part of the tool on a lower part which is fixed during the forming process.
  • the pressure plate on the other hand, is attached to the upper part which is movable during the forming process.
  • a hollow guide stamp 45 for the lower stamp 21 is arranged in the lower holding plate 12.
  • the lower die part 22, which is provided with teeth 23, is in turn screwed onto the end face of the lower die 21.
  • Radial slot-shaped recesses 48 are formed on the end face 46 of the punch 45 from the central bore 47, in which the punch 21 is guided.
  • the recesses 48 are machined at the same angular distance as the slots 9 in the flange 4 of the blank 1.
  • a hook-shaped securing part 49 is inserted, which has a section 50 corresponding to the securing pin 14 according to FIGS. 2 to 6.
  • the securing parts 49 are screwed to a shoulder 52 of the end face 46 by a form ring 51, which engages in the hook-shaped securing parts 49 and the correspondingly designed end face 46 of the guide stamp 45.
  • the sections 53 of the end face 46 between the sections 50 of the securing parts 49 together with the end face 54 of an end section of the shaped ring 51 form the workpiece holder for the blank 1.
  • the sections 50 of the securing parts 49 protrude beyond the end faces 53 and 54 and thus above the workpiece holder and protrude into the receiving area for the blank 1.
  • a middle holding plate 55 is arranged such that it can move relative to the lower holding plate 12.
  • a slide receptacle 56 is fastened to the middle holding plate 55 and is likewise designed as a shaped ring.
  • the slide receptacle 56 has radial slots 57 at the same angular distance as the sections 50 of the securing parts 49.
  • the slots 57 open into a section 58 of the central bore of the slide receptacle 56.
  • the bottom of the slots 57 lies at the level of the through the end sections 53 and 54 formed workpiece holder.
  • the slots 57 are aligned with the sections 53 of the end face 46 of the guide plunger 45.
  • a slide 59 is inserted in each slot 57 so as to be radially movable.
  • the inner end face 60 of the slide 59 projecting into the bore section 58 has the shape and size of the outside of the commutator segments 7 of the blank 1, including the flange 4 which later forms the connecting lugs 10.
  • the slide 59 is provided with a shoulder 61 in accordance with the flange 4.
  • the outer end of the slide 59 is, as in the slide 29 according to FIGS. 2 to 6, designed as a stop 30 against which the spring arrangement 31 rests, which is supported on the slide receptacle 56.
  • the outer end face 32 of the slide 59 is in turn beveled.
  • a resilient guide arrangement 62 holds the slide 59 pressed against the bottom of the slots 57. It is provided with a stop ring 63, which limits the radial movement of the slide 59, which is pushed outward by the force of the spring arrangement 31.
  • the bell-shaped pressure plate 15 is fastened, on the underside of which a coaxial depression 64 is formed with a cylindrical section 65, to which a conically widening end section 66 connects.
  • the upper punch 37 is guided to be longitudinally movable.
  • the upper die part 39 with teeth 40 is in turn arranged on its end face 38, on its end face 41 the calibration ring 42 is seated.
  • the upper die part 39 and the calibration ring 42 are screwed to the upper punch 37.
  • the upper holding plate 24 is supported on the middle holding plate 55 via a spring arrangement 68.
  • the forming tool is shown in Figure 10 in the position at the end of the working stroke.
  • the middle and upper holding plates 55 and 24 with slide receptacle 56 and slides 59 pressure plate 15 and upper punch 37 are lifted off the lower holding plate 12 and from the workpiece holder 53, 54 on guide punch 45 and shaped ring 51 held in their uppermost position.
  • the upper punch 37 is retracted so far into the central bore 67 that the upper die portion 39 and the calibration ring 42 are pulled out of the bore 56 in the region of the slide 59.
  • the lower punch 21 is advanced so far in the guide punch 45 that the end face of the lower die part 22 resting against its end face lies in one plane with the end face sections 53 and 54 and thus the workpiece holder.
  • the blank 1 is placed on the lower die part 22, so that its flange 4 sits on the end face sections 53, 54 of the workpiece holder.
  • the ends 50 of the securing parts 49 projecting at the sections 53, 54 engage in the slots 9 in the flange 4 of the blank 1.
  • the position of the blank 1 is thereby fixed in the forming tool.
  • the ends 50 of the securing parts 49 prevent the slots 9 from being formed into an undesirable shape when the blank 1 is being shaped into the commutator 2.
  • the middle and the upper holding plates 55 and 24 are moved axially towards the blank 1 until the middle holding plate 55 lies on the lower holding plate 12.
  • the slide receptacle 56 then surrounds the blank 1 at a distance with its bore section 58, while the bottom of the slots 57 and thus the lower edge of the slide 59 lie in the plane of the end face sections 53, 54 and thus the end face of the flange 4 of the blank 1.
  • the upper holding plate 24 with the bell-shaped pressure plate 15 is moved axially towards the middle holding plate 55.
  • the conical section 66 of the pressure plate 15 presses against the bevelled outer end face 32 of the slide 59 and simultaneously pushes the slide 59 radially against the commutator segments 7 of the blank 1, the segments 7 being pressed between the teeth 23 of the lower die part 22 and which Segments 7 connecting webs 8 are curved outwards and the segment partial grooves 6 are narrowed according to the shape of the teeth 23.
  • the shoulder 61 of the slider 59 presses on the edge of the flange 4 of the blank 1 and thus on the subsequent connecting lugs 10.
  • the webs 11 between the slots 9 are also arched outwards and the slots 9 are narrowed.
  • the upper punch 37 is then first withdrawn.
  • the upper die part 39 is moved out of the blank 1 and then the calibration ring 42 is pulled through the blank 1.
  • the calibration ring 42 in turn forms the inner ends 43 of the commutator segments 7 into anchoring means 44, which extend in the dovetail shape in the circumferential direction into the segment partial grooves 6.
  • the blank is now cold formed to the commutator ring 2.
  • the forming tool is opened.
  • the upper holding plate 24 is pressed away from the middle holding plate 55 by the force of the spring arrangement 68, the spring arrangement 31 pushing the slide 59 outward.
  • the two holding plates 24 and 55 with pressure plate 15 and slide receptacle 56, slides 59 and spring arrangement 31 are then moved together into their starting position away from the lower holding plate 12.
  • the lower die 21 with the lower die part 22 in the guide cylinder 45 is pushed back into its starting position.
  • the anchoring means 44 are in turn formed on the return stroke of the upper punch 37, 42 and the lower punch 21, 22 also acts as an ejector for the commutator ring on returning to its starting position after the forming process has ended 2nd
  • a third exemplary embodiment of the forming tool with a one-part, two-stage punch for cold-forming the blank 1 to form the commutator ring 2 by reducing and shaping the anchoring means 44 in two stages is shown in a simplified manner in FIG.
  • the forming tool is shown in the starting position.
  • a guide stamp 69 with a slide holder 70 with slots 71, the base of which lies somewhat below the plane of the end face 72 of the guide stamp 69, which serves as a workpiece holder.
  • the slots 71 are also formed at the same angular distance from one another.
  • the slides 73 guided in them have an inner end face in the form and size of the outside of the commutator segments 7 of the blank 1.
  • the sliders 73 are provided with a stop 74 at their outer end.
  • the outer end face 75 of the slide 73 is in turn beveled.
  • a driver 76 is also formed, on which the slide 73 is moved back into its outer, the starting position.
  • a punch 78 is movably received in a central bore 77 of the guide punch 69.
  • a die is attached with a first die section 79, a subsequent second die section 80 and an end designed as a calibration ring 81.
  • the first die section 79 is provided with longitudinally extending teeth 82 which are evenly distributed over the entire circumference, corresponding to the segment grooves 6 of the blank 1.
  • the tooth cross section of the teeth 82 of the first die section corresponds to the cross section of the segment grooves 6 of the blank 1 which was reshaped at the end of the first reduction stage
  • Sliders 73 are also provided with a shoulder 83 which protrudes from the inner end face of the slider 73 by the width of the flange 4 of the blank 1. In the starting position of the stamp 78, the end of the first shaped stamp section adjoining the stamp 78 lies at the height of the slots 71 and thus the lower edge of the slides 73 guided in the slots 71.
  • a bell-shaped pressure plate 84 with a recess 85, the wall 86 of which extends obliquely to the end face 87 of the pressure plate 84, can be moved longitudinally relative to the guide die 69 and is guided on a hollow cylindrical hold-down device 88 of the upper tool part. From the recess 85 extend parallel to the wall 86 return rails 89. Securing pins 90 are guided in the hollow cylindrical hold-down device 88, the ends of which protrude from the end face 91 of the hold-down device 88 and are arranged radially corresponding to the slots 9 in the flange 4 of the blank 1.
  • the blank 1 is inserted into the open forming tool in such a way that the end face of its shaft 3 rests on the end face 72 of the guide die 69 and its flange 4 rests on the shoulder 83, while the first die section 79 sits in the blank 1.
  • the hold-down 88 with the locking pins 90 is first moved towards the blank 1 until the locking pins 90 protrude into the slots 9 in the flange 4 of the blank 1 and the end face 91 of the hold-down 88 rests on the end face of the flange 4.
  • the pressure plate 84 is in the meantime moved towards the guide ram 69, so that the inclined wall 86 of the recess 85 presses on the bevelled end face 75 of the slider 73, while the return rails 89 slide along the inside of the drivers 76 of the slider 73.
  • the slides 73, 83 are pressed radially onto the commutator segments 7 together with the flange 4 of the blank 1.
  • the segments 7 are pressed between the teeth 82 of the first die section 79 until they abut their flanks.
  • the segment grooves 6 and the slots 9 are narrowed and the webs 11 connecting the segments 7 and connecting lugs 10 bulge outwards.
  • the stamp 78 is moved into the guide stamp 69 until the second shaped stamp section 80 is in the blank 1.
  • the axial movement of the pressure plate 84 is continued, so that the slides 73, the commutator segments 7 press between the teeth 92 of the second die section 80.
  • the segment grooves 6 and the slots 9 are thereby to the desired final dimension reduced as well as the diameter of the shaft 3 and the flange 4 between the webs 8 and 11 ( Figure 8).
  • the punch 78 is pulled further into the guide punch 69 and thus the calibration ring 81 through the blank 1.
  • the inner ends 43 of the commutator segments 7 are formed into dovetail-shaped anchors 44 which extend in the circumferential direction into the adjacent segment partial grooves 6 (FIG. 9), so that the blank 1 is completely formed into the commutator ring.
  • the pressure plate 84 and the hold-down device 88 with the securing pins 90 are moved away from the shaped commutator ring 2.
  • the return rails 89 press against the drivers 76 of the slider 73 and thus move the slider 73 back to their original position.
  • the stamp 78 is pushed forward into its starting position on the pressure plate 84 until the first shaped stamp section 79 reaches the height of the slide 73.
  • the teeth 92 of the second die section 80 push the commutator ring 2 out of the area of the slide 73 so that it can be removed from the forming tool.
  • the inventive method can be carried out with the third embodiment of the forming tool in an advantageous manner that only when the punch moves to pull out the second punch section 80 after, for example, two-stage reduction, the anchoring means 44 are formed on the commutator segments 7 and the punch 78 when it is moved back into it Starting position when the forming tool is opened again with the second die section 80, 92 attached to it serves as an ejector for the commutator ring 2.
  • the slots 9 and segment partial grooves 6 can only be reduced by a small amount, it is sufficient to form the die in one part and in one step. However, if relatively large forming forces occur, for example, on blanks for large commutator rings, the reduction can also take place in more than two stages.
  • the lower die part 22 according to FIGS. 2 to 6 and 10 can then be designed in two or more stages, while the upper die part 39 is still used for the last reduction stage and is connected to the calibration ring 42.

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  • Manufacturing Of Electrical Connectors (AREA)
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Claims (8)

  1. Procédé de fabrication d'une bague de commutateur (2) pour un commutateur, comportant un grand nombre de segments (7) avec des chemins de branchement (10) et des moyens d'ancrage (44), par transformation à froid d'une ébauche (1) y compris réduction en forme d'un manchon (3) dont une extrémité comporte une bride (4), avec des rainures de division de segments 6 dans la paroi intérieure du manchon et des fentes de division de chemins (9) dans la bride, le diamètre extérieur de l'ébauche (1) placée sur un poinçon de formage (22, 39 ; 79, 80) d'un outil de transformation étant réduit par des moyens de réduction (29, 59, 73) agissant radialement sur les différents segments (7) y compris les chemins (10), sur le diamètre extérieur de la bague de commutateur (2), cette bague (2) étant éjectée lors de l'ouverture de l'outil de transformation par mouvement du poinçon de formage (22, 39, 79, 80) vers sa position de sortie et en ce que l'on réalise les moyens d'ancrage (44) sur la face intérieure des segments (7), procédé caractérisé en ce qu'on forme les moyens d'ancrage (44) par déplacement axial d'un poinçon de formage (22, 39 ; 79, 80) en une ou plusieurs étapes, à partir de l'ébauche (1) et en ce qu'on réduit le diamètre extérieur de l'ébauche (1) au cours d'une course de travail correspondant aux étapes du poinçon de formage (22, 39 ; 79, 80) par des coulisseaux (29, 59 ; 73) agissant sur les différents segments (7) y compris les chemins (10), ces coulisseaux étant portés par une plaque de fixation (24, 25 ; 55, 56 ; 70) de l'outil de transformation et ces coulisseaux étant déplacés radialement vers les segments (7) correspondants y compris les chemins (10) pendant la course de travail, par une plaque de compression (15 ; 84) mobile axialement par rapport à la plaque de fixation (24, 25 ; 55, 56 ; 70).
  2. Procédé selon la revendication 1, caractérisé en ce qu'on réduit les rainures de division des segments (6) sur la face intérieure de l'ébauche (1) par compression radiale des segments (7) y compris les chemins (10), la face intérieure des segments (7) étant poussée entre des dents (23, 40 ; 82, 92) dans la direction longitudinale du poinçon de formage (22, 39 ; 79, 80) en fonction des rainures de division de segments (6), réduites, au cours du mouvement axial de la plaque de compression (15 ; 84).
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la réduction se fait en plus d'une étape de la course de travail et le poinçon de formage (22, 39 ; 79, 80) comportant des segments de dents (23, 40 ; 82, 92) à diamètres différents en fonction des segments et correspondant aux étapes, ces segments de dents ayant le profil des rainures de division de segments (6) à réduire et des coulisseaux (29 ; 59 ; 73) agissant radialement sur les différents segments (7) comme des moyens de réduction au cours de la première étape en poussant l'ébauche (1) sur le segment (22 ; 79) du poinçon de formage de plus grand diamètre, puis le poinçon de formage (39 ; 80) de l'outil de transformation étant déplacé axialement par rapport à l'ébauche (1) et la plaque de fixation (24 ; 70) avec les coulisseaux (29 ; 59 ; 73) pour l'étape suivante de plus petit diamètre, au cours de laquelle les coulisseaux (29 ; 59 ; 73) sont de nouveau poussés radialement sur les segments (7) y compris les chemins (10) par la plaque de compression (15 ; 84), la face intérieure des segments (7) étant là encore poussée entre les dents (40 ; 92) du segment de poinçon de formage (39 ; 80) en regard.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la réalisation des moyens d'ancrage (44) sur l'extrémité intérieure des segments (7) après mouvement axial du segment de poinçon de formage (39, 80) avec des dents (40 ; 92) correspondant aux rainures de division réduites (6) de la bague de commutateur (2) de l'ébauche (1) se fait par un dispositif de calibrage (42 ; 81), prévu sur le poinçon de formage (39 ; 80) et que l'on fait passer axialement à travers l'ébauche (1).
  5. Procédé selon la revendication 4, caractérisé par un dispositif de calibrage (42 ; 81) se composant d'au moins une bague de calibrage comportant des dents (40 ; 92) correspondant aux rainures de division de segments (6), réduites, de la bague de commutateur (2) sur la face avant du poinçon de formage (39 ; 80), dispositif qui, lorsqu'on déplace le poinçon de formage (39 ; 80) vers sa position de sortie, est tiré à travers l'ébauche (1) maintenue dans la plaque de fixation (24, 25 ; 55, 56; 70) par les coulisseaux (29 ; 59 ; 73) pour donner à l'extrémité intérieure (44) des segments (7) une forme de queue d'aronde.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'à l'ouverture de l'outil de transformation par déplacement du poinçon de formage (22, 39 ; 79, 80) en une partie et une ou plusieurs étapes, dans sa position de sortie, la bague de commutateur (2) est éjectée par les dents (40 ; 92) du poinçon de formage correspondant aux rainures de division de segments réduites (6) de la bague de commutateur (20), dents contre lesquelles s'appliquent dans la direction périphérique de la bague (2), les saillies (44) en forme de queue d'aronde.
  7. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'à l'ouverture de l'outil de transformation par mouvement du poinçon de formage (22, 39) en deux parties et plusieurs étapes, il y a éjection par la partie du poinçon de formage (22) avec le segment correspondant à la première étape de réduction.
  8. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'ébauche reçue par le poinçon de formage (79, 80) en une seule partie, à deux étapes, avec dispositif de calibrage (81) s'appuie sur une plaque de fixation (70) inférieure recevant les coulisseaux (73) et la plaque de compression (84) fixée sur une plaque de fixation supérieure est pressée axialement sur les coulisseaux (73) qui s'appuient radialement sur les segments (7).
EP19830110670 1982-11-23 1983-10-26 Méthode de fabrication d'une bague de commutateur pour un commutateur Expired - Lifetime EP0111688B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823243191 DE3243191A1 (de) 1982-11-23 1982-11-23 Verfahren zum herstellen eines kommutatorringes fuer einen kommutator
DE3243191 1982-11-23

Publications (3)

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EP0111688A2 EP0111688A2 (fr) 1984-06-27
EP0111688A3 EP0111688A3 (en) 1986-07-16
EP0111688B1 true EP0111688B1 (fr) 1991-11-21

Family

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EP19830110670 Expired - Lifetime EP0111688B1 (fr) 1982-11-23 1983-10-26 Méthode de fabrication d'une bague de commutateur pour un commutateur

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US (1) US4698902A (fr)
EP (1) EP0111688B1 (fr)
JP (1) JPS59106859A (fr)
DE (2) DE3243191A1 (fr)
SU (1) SU1421269A3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823844A1 (de) * 1988-07-14 1990-01-18 Kautt & Bux Kg Kommutator fuer elektrische maschinen und verfahren zu seiner herstellung
DE4124386C1 (fr) * 1991-07-23 1992-10-22 Kolektor D.O.O., Idrija, Yu
WO1995022184A1 (fr) * 1994-02-10 1995-08-17 Comtrade Handelsgesellschaft Mbh Bague d'armature pour corps de rotation et son procede de fabrication
FR2769415B1 (fr) * 1997-10-07 1999-12-24 Meritor Light Vehicle Sys Ltd Procede de fabrication d'un collecteur de machine tournante et collecteur fabrique selon ce procede
FR2769416B1 (fr) * 1997-10-07 1999-12-24 Meritor Light Vehicle Sys Ltd Procede de fabrication d'un collecteur pour machine tournante et collecteur fabrique selon ce procede
BR0104017B1 (pt) * 2001-07-18 2010-11-30 processo de fabricação de coletor blindado.
KR20020050192A (ko) * 2002-04-17 2002-06-26 권진하 플렌지형 정류자 제조방법
JP5901279B2 (ja) 2011-01-31 2016-04-06 トライス株式会社 カーボンコンミテータ及びその製造方法

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DE961910C (de) * 1954-12-31 1957-04-11 Bosch Gmbh Robert Verfahren zum Herstellen eines Stromwenders aus einem ringfoermigen Werkstueck
DE3201027A1 (de) * 1982-01-15 1983-07-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum herstellen eines kommutatorringes fuer einen kommutator

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US2367783A (en) * 1942-03-11 1945-01-23 Thompson Prod Inc Method of making cold worked hollow stem valves
US3468020A (en) * 1966-12-12 1969-09-23 Ford Motor Co Method of anchoring a metallic member to plastic
US3568303A (en) * 1967-05-02 1971-03-09 Akio Ito Method for working a yoke of a smallsized electric machine
US3566651A (en) * 1968-10-03 1971-03-02 Fellows Gear Shaper Co Method and apparatus for forming internally profiled tubular parts by material displacement
DE2028857C3 (fr) * 1969-06-13 1975-05-28 Hitachi Ltd., Tokio
JPS5017353A (fr) * 1973-06-19 1975-02-24
DE2420838A1 (de) * 1974-04-30 1975-11-20 Kabel Metallwerke Ghh Verfahren zur herstellung von kommutatoren aus kupfer oder einer kupferlegierung
JPS5939533B2 (ja) * 1975-08-16 1984-09-25 イケダ ツギノブ 並列糸分離方法
SU651882A1 (ru) * 1976-12-30 1979-03-15 Центральный Научно-Исследовательский Институт Технологии Машиностроения Штамп дл обратного выдавливани полных деталей с наружными утолщени ми
SU682306A1 (ru) * 1978-04-18 1979-08-30 М. К. Олейник Блок штампа со сменным пакетом дл обработки листового материала
US4216575A (en) * 1979-02-01 1980-08-12 Noranda Mines Limited Method of reforming the fins of a finned tube
YU81780A (en) * 1980-03-24 1982-10-31 Kolektor Method of producing a cast in commutator
JPS58181441A (ja) * 1982-04-19 1983-10-24 Mitsuboshi Seisakusho:Kk ステアリングヘツドパイプの製造方法

Patent Citations (2)

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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
DE3201027A1 (de) * 1982-01-15 1983-07-28 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zum herstellen eines kommutatorringes fuer einen kommutator

Also Published As

Publication number Publication date
DE3382463D1 (de) 1992-01-02
DE3243191A1 (de) 1984-05-24
US4698902A (en) 1987-10-13
JPS59106859A (ja) 1984-06-20
EP0111688A2 (fr) 1984-06-27
EP0111688A3 (en) 1986-07-16
SU1421269A3 (ru) 1988-08-30

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