• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of shaping a U-shaped winding element (10) for an electromagnetic core (11). An inner tool portion (23) having a housing (29) in the region of its outer periphery and an outer tool portion (26) with a housing (30) in the region of its inner periphery is used. The winding element (10) is housed in the inner part (23) and in the outer tool part (26) so that a rod segment (13) is in the housing (29) of the part interior (23) and that the other stem segment (15) is in the housing (23) of the outer part (26). The inner portion (23) and the outer portion (26) are rotated relative to one another. Before the spreading movement of the two rod segments (13, 15), a gripping element (50) is brought closer with its tooth (53) to the rod segment (15).
    公开号:FR3030930A1
    申请号:FR1562366
    申请日:2015-12-15
    公开日:2016-06-24
    发明作者:Paul Borrmann；Dittmar Kleemann；Peter Schreiber；Hans-Juergen Schwarz；Klaus Hilke
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] Field of the Invention The present invention relates to a method of forming a U-shaped winding element for an electromagnetic excitation core of a rotating electrical machine, in which the U-shaped bearing has a first rod segment and a second rod segment connected by an arc-shaped rod segment. STATE OF THE ART According to the state of the art, processes are known for forming such a U-shaped or hairpin winding element for an electromagnetic core of a rotating electrical machine. The U-shaped winding elements (also called "hairpin winding element") or their rod segments are spaced from each other; by holding them down, the hairpin elements are held in the forming tool. But in general, the hairpin winding element may slide so that one will have an axially longer winding head than desired. OBJECT OF THE INVENTION The object of the present invention is to develop a hairpin winding element forming process for the electromagnetic excitation core of a rotating electrical machine, thereby preventing the sliding of winding elements in hairpin.
    [0002] DISCLOSURE AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the invention is a process for shaping a U-shaped winding element for an electromagnetic excitation core of a rotary electric machine, according to which the U-shaped rolling member has a first rod segment and a second rod segment connected by an arc-shaped rod segment. An inner tool portion having at least one housing in the region of its outer periphery and an outer tool portion with at least one housing in the region of its inner periphery is used and the shaped winding element is housed. U in the inside of the tool and in the outer part of the tool so that one rod segment is in the housing of the inner part of the tool and the other segment of the rod is in the housing of the outer tool portion and the inner tool portion and the outer tool portion are rotated relative to each other about the axis of rotation, the two rod segments being moved so as to move away from each other, before the movement of separation of the two rod segments, and is brought closer to a gripping element with its tooth, the rod segment which is taken by the tooth. According to another advantageous characteristic in another step, with the gripping element the outer contour is depressed by deformation of the rod segment with the tooth in the rod segment and thus the tooth is pushed into the rod segment by a connection by the form with a penetrating force. According to another advantageous characteristic, a thrust exerted on the rod segment is generated by a ramp which, by co-operating with the housing, generates a resultant force radially inwards in the region of the inner periphery of the outer tool part. According to another advantageous characteristic before the setting of the rod segment by the tooth, the rod segment is pushed by the sliding ramp, radially inwards against the radial inner support of the housing to then generate the gripping contour. According to another advantageous characteristic, the one or more gripping elements are driven to drive the outer tool part in the direction of rotation in the state of a stop element. According to another advantageous characteristic, the one or more gripping elements are driven by an abutment element after a vacuum stroke in order to rotate the outer part of the tool. According to another advantageous characteristic, the two rod segments of a winding element are rotated so as to spread them apart in order to bend them, taking account of the compensation angle. According to another advantageous characteristic after the bending, the external tool part is turned back along the compensation angle to reach the end position of the tool outer part in which the at least one gripping element is recalled enough to clear the tooth or teeth of the stem segment and its grip. Drawings The present invention will be described below in more detail using embodiments of a hairpin winding element forming method for the electromagnetic core of a rotating electrical machine as well as electric machines obtained with such winding elements, FIG. 1 shows a U-shaped winding element, FIG. 2 shows a partial top view of a bending tool, FIG. in a pair of housings of a bending tool, FIG. 4 shows details of the shape of a winding element, FIG. 5 shows how a gripping element with a tooth and its corners sink into the rod segment of the rod segment transformation contour, the tooth thus taking the rod segment by a form connection with its penetrating force, FIG. 6 shows how to take the rod segment by the tooth the rod segment is pushed radially inwards by the ramp, Figure 7 shows the bending with the bending tool, Figure 8 shows a certain position of the bending tool, Figures 9a, 9b, 9c schematically show a part of the extraction operation of the winding elements out of the bending tool, Figure 10 shows a sectional view of two rod segments, Figure 11 shows how the lower side of the slide of In this case, the guide pushes the slide between the four rod segments in this case. FIG. 12 shows a step of the method in which the sliding element first exerts a force in the radial direction on the winding element. or on an outer shank segment, FIG. 13 shows how the sliding element slides, FIG. 14 shows how the sliding of the sliding element along the ramps generates the clamping force between the two sliding elements or their segment.15 shows schematically the extraction operations of the winding elements of the bending tool and their engagement in the electromagnetic core.
    [0003] Embodiment Description FIG. 1 shows a U-shaped winding element (hairpin winding element) used, for example, for the manufacture of armature (rotors) of DC motors or also for inductors (stators) of alternating current machines such as, for example, alternators. This hairpin winding element 10 has a first shank segment 13 and a second shank segment 15 connected by an arc-shaped connecting segment 16. The armature of a rotor to be produced comprises, for example, notches 25 so that such winding elements 10 must be used. Rotor armatures having 17 or 19 winding elements 10 or a different number of winding elements are also known. such winding elements. FIG. 2 is a cut-away top view of a bending tool 20. This bending tool 20 consists of an inner portion 23 and an outer portion 26. Both the inner portion 23 and the outer portion 26 each has 25 slots 29, 30 in the form of grooves which can be made for example in the form of tube. When the two tool parts 23, 26 are in the rest position, the housings 29, 30 face each other directly so that they have substantially the same angular position with respect to a common line 33 passing through the axis. The housings 29, 30 each have a side wall 39, 42 which in this case constitute reference surfaces. This means that the housings 29, 30 are aligned so that the sidewalls 39, 42 are preferably in a common plane. The winding elements 10 come with their two ends 41, 43 on a not shown fastening element (which is for example the slider 69 in FIG. 9a) to thereby have a minimum overlap of the arc-shaped connecting segment 16 and portions of the first shank segment 13 and the second shank segment 15. This overshoot allows bending of the reel member 10.
    [0004] FIG. 3 shows how the winding elements are placed in a pair of housings 29, 30. In principle, it does not matter whether the winding elements 10 are pre-bent or not as in FIG. 3. The preintrated state means here that the winding element 10 in the rest position, before being turned, is placed in the housings 29, 30 which are not directly opposite, but offset. The winding element 10 thus has a round section outer rod segment and an inner rod segment 13 with two parallel side surfaces 44, 45 connected by rounded corners (FIG. 4). In addition, the bending tool 20 has a gripping member 50. This gripping member 50 has at least one tooth 53. The engaging member 50 is preferably arc-shaped and has an inner arc thereof. for example eight teeth. At the periphery of the outer portion 26 of the tool, there are preferably three gripping elements 50 of curved shape. The other gripping elements have, in this case, one eight teeth and the other nine teeth so that for all three gripping elements 50 there will be preferably 25 teeth overall. preferably each time several teeth 53. This allows all the winding elements 10 to be taken preferably simultaneously by the teeth 53.
    [0005] Thus, according to the method, at least one hairpin winding element 10 is formed for an electromagnetic excitation core 11 of a rotating electrical machine 12; the hairpin (or U-shaped) winding element 10 has a first shank segment 13 and a second shank segment 15; these two segments are connected by a connecting segment 16 of curved shape; the inner tool portion 23 has at least one housing 29 in the region of its outer periphery and the outer tool portion 26 has at least one housing 30 on its inner periphery; the hairpin winding element 10 is thus placed in the inner part of the tool 23 and in the outer part of the tool 26 so that the rod segment 13 is placed in a housing 29 of the inner part of the body. 23 and that the other rod segment 15 is located in a housing 30 of the outer portion of tool 26; the inner part 23 and the outer part 26 are rotated relative to each other about the axis of rotation 36 and thus the two rod segments 13, 15 of the winding element 10 are spaced apart. one of the other and before removing the two rod segments 13, 15, a engaging element 50 is engaged with a tooth 53 on the rod segment 15 which will be taken by the tooth 53. According to another step, one depressing the engaging member 50 with the tooth 53 and its wedges 54 in the engagement segment 15 to form a gripping contour 60 by deformation of the engagement segment 15 and thereby causing the tooth 53 of the shaft segment 15 to act by a connection by the form with the gripping force FE (Figure 5). In particular, by its movement, the tooth 53 exerts on the rod segment 15 by its inclined surface 63, a thrust FP on the segment 15 which, in connection with the housing 30 of the outer tool portion 26, generates a force Fi directed radially inward. Thus, before the rod segment is taken by the tooth 53, this rod segment 15 is pushed radially inwards by the ramp 63 (FIG. 6). The shank segment 15 pushed against the inner radial position 66 of the housing 30 forms the engaging contour 60 (FIG. 5). During this operation, the rod segment 15 is pushed against the housing 30. It is intended to drive the one or more gripping elements 50 in the direction of rotation. Thus, it is in particular intended to drive the one or more gripping elements 50 by an abutment or fixing element, preferably after a vacuum stroke, to drive the outer part of the tool 26 in the opposite direction. of rotation. The two rod segments 13, 15 of a winding element 10 are in this case spaced and turned for example by at least five housings 29, 30. In fact, it is possible to turn even more, for example to compensate for an angle equilibrium (a) equal to about 50 to compensate for the elastic component at bending of the arc-shaped rod segment 16 (over-bending) (see FIG. 7). Preferably, in case of over-bending, the outer tool portion 26 is returned by a compensation angle (a) of about 50 to reach the end-of-travel position of the outer tool portion 26. this position of the outer tool portion 26, recalls the one or more engaging elements 50 so that the tooth or teeth 53 are disengaged from the rod segment 15 and its gripping contour 60 (FIG. 8).
    [0006] Then, the winding elements 10 can be extracted from the bending tool 20. This is shown schematically in FIGS. 9a, 9b and 9c. According to FIG. 9a, a pusher 69 pushes the winding elements 10 by the side of their ends 41, 43 out of the housings 29 of the inner tool portion 23 and the housings 30 of the outer tool portion 26 of the bending tool 20, for example by partially disengaging the winding elements 10. After this partial disengagement of the winding elements 10, the arc-shaped connecting segments 16, which are the closest (here the upper portions of the rod segments 13, 15 are freely accessible from the side or side of the bending tool, which allows an extraction device 75 to extract the winding elements 10 from the bending tool 20 (Figure 9c) To extract the winding elements 10 sliders 70 are slid between a plurality of winding elements 10 and between the winding elements 10 and the sliders 70 FK clamping forces develop in the peripheral direction of the winding elements 10. so that the The winding element 10 remains locked between the sliding elements 78, 79. FIG. 10 is a detail representation of rod segments 13 and rod segments 15, with a separate guide 80 provided with a separate slider 70, a sliding disc 83 with a guide slide 85 for the slider 70 and its guide studs 87. The slider 70 has, among other things, the sliding elements 78, 79 already mentioned. The sliding element 78 is radially movable in the guide 80. This sliding element 78 is driven by the sliding disk 83 rotating about the axis of rotation 36 so that the slide 85 moves in the peripheral direction U. To slide the slider 70 between several winding elements 10, the slider disc 83 is rotated in the direction of rotation of the clockwise (peripheral direction U). The other side 90 of the guide slide 85 pushes the slide 70 between the rod segments 13, 15 which in this case are limited to four rod segments 13, 15 (FIG. 11). The sliding element 79 also slides via a guide pin 91 on a not shown slide disc, by guiding by a slider not shown first at regular speed and equal in the interspace. 93 shaped wedge. The sliding elements 78, 79 are thus slid together between the winding elements 10. To produce the clamping force FK in the peripheral direction, the sliding element 78 is slid into the wedge-shaped gap 93 between sliding member 79 and a winding element 10. Fig. 12 shows the process step by which the slide member 79 first exerts a radially-applied force FR on a winding element 10 or on the winding element 10. This stem segment 15 is thus pushed against the inside edge of the housing 30. The sliding member 79 is not pushed further radially inwards. In the peripheral direction, the addition 95 is still spaced substantially from the next-nearest rod segment 13 and thus exerts no force in the peripheral direction on the rod segment 13. The rear side of the cheek 95 has a ramp 98. The sliding element 78 also has a cheek 99 and on the rear side of the cheek 99 there is a ramp 100. The sliding element 79 thus produces a force FR firstly in the radial direction and then a clamping force FK in the peripheral direction. In the rest of the method (FIG. 13), the sliding element 78 slides behind the sliding element 79. The sliding element 78 thus pushes harder by its ramp 100 against the ramp 98 of the sliding element 79, which increases the FR force. The sliding of the element 78 generates, by sliding along the ramps 98 or 100, the clamping force FK between the two winding elements 10 or their rod segment 13 (FIG. 14). The two ramps 98, 100 are thus on a plane 103, common, inclined and which is not oriented radially relative to the axis of rotation. The clamping force FK is then transmitted by the cheek 95 to the upper shank portion 13 and the other clamping force FK is transmitted by the cheek 99 to the lower shank portion 13.
    [0007] Also, to extract the winding element 10, the pushers 70 are slid between several winding elements 10 so that clamping forces FK are exerted in the circumferential direction between the winding elements 10 and the pusher 70. so that the winding element 10 or its rod segment 13 is clamped between the sliding elements 78 and 79. Figures 15a, 15b, 15c and 15d show process steps according to which all the rod segments 13, 15 directly adjacent are housed in an adjacent housing 29 in the circumferential direction of an inner tool portion 23 and a housing 30 of an outer tool portion 26, with a constant distance from the rotation axis 36; each slider 70 acts on the directly adjacent rod segments 13, 15 simultaneously with a clamping force FK (FIG. 15a) and thus makes it possible to extract all of the winding elements 10 from the tool bending 20 through the slider 70 (Figure 15b) and then the winding elements are engaged in the not shown notches of the electromagnetic excitation core 11 (Figure 15c and Figure 15d). Here the core is for example the body of a rotor with notches open radially outwards for a DC electric motor such as for example the starter of an internal combustion engine or the stator with check marks open radially inwards in the case of an alternator (Figure 16) .25 NOMENCLATURE OF MAIN ELEMENTS 10 U-shaped winding element 11 Hub 12 Rotating machine 13 First rod segment 15 Second rod segment 16 Segment 20 Bending tool 23 Inner part of tool 26 Outer part of tool 29, 30 Housing 50 Holding element 53 Tooth 69 Pusher 70 Slide 75 Extraction device 78, 79 Sliding element 80 Guide 83 Sliding disc 85 Slide guide 87 Guide pin 90 Side 93 Interval 95 Add 98 Ramp 99 Play 100 Ramp 103 Common plane 35
    权利要求:
    Claims (8)
    [0001]
    CLAIMS 1 °) A method of shaping a U-shaped winding element (10) for an electromagnetic excitation core (11) of a rotating electrical machine (12), according to which - the rolling element (10) ) in the form of a U with a first rod segment (13) and a second rod segment (15) connected by an arc-shaped rod segment (16), an inner tool portion (23) is used having at least one housing (29) in the region of its outer periphery and an outer tool portion (26) with at least one housing (30) in the region of its inner periphery and housing the element of U-shaped winding (10) in the tool inner part (23) and in the tool outer part (26) so that a rod segment (13) is in the housing (29) of the part inside the tool (23) and that the other rod segment (15) is in the housing (23) of the tool outer portion (26), and the inner portion of the til (23) and the outer tool portion (26) relative to each other about the axis of rotation (36), the two rod segments (13, 15) being moved so that away from each other, and before the spreading movement of the two rod segments (13, 15), a gripping element (50) with its tooth (53) is brought closer to the rod segment (15). ) which is taken by the tooth (53).
    [0002]
    Method according to Claim 1, characterized in that in another step, with the engagement element (50), the outer contour (60) is depressed by deformation of the shaft segment (15) with the tooth (53). in the shank segment (15) and thereby pushing the tooth (53) into the shank segment (15) by a form connection with a penetrating force.
    [0003]
    3) Method according to claim 2, characterized in that generates a thrust (Fp) exerted on the rod segment (15) by a ramp (63) which cooperating with the housing (30) generates a resultant force ( Fi) radially inward in the region of the inner periphery of the tool outer portion (26).
    [0004]
    Method according to claim 3, characterized in that before the end of the stem segment (15) is gripped by the tooth (53), the stem segment (15) is pushed by the sliding ramp (63) radially inwards. the interior against the inner radial support (66) of the housing (30) to then generate the gripping contour (60).
    [0005]
    Method according to Claim 1, characterized in that the at least one engaging element (50) is driven to drive the outer tool part (26) in the direction of rotation to the state of an element. stop.
    [0006]
    Method according to Claim 5, characterized in that the one or more gripping elements (50) are driven by an abutment element after a vacuum stroke to rotate the outer tool part (26).
    [0007]
    Method according to Claim 1, characterized in that the two rod segments (13, 15) of a winding element (10) are rotated away from each other to bend them taking account of the compensation angle (ALPHA).
    [0008]
    Method according to Claim 7, characterized in that after the bending, the outer tool portion (26) is rotated by the compensating angle (ALPHA) to reach the end position. the outer tool portion (26) in which the one or more engaging members (50) are biased sufficiently to disengage the one or more teeth (53) from the stem segment (15) and its engagement contour (60).
    类似技术:
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    同族专利:
    公开号 | 公开日
    US10181777B2|2019-01-15|
    CN105720760A|2016-06-29|
    DE102014226224A1|2016-06-23|
    US20160181897A1|2016-06-23|
    FR3030930B1|2019-09-20|
    CN105720760B|2019-03-12|
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    法律状态:
    2016-12-21| PLFP| Fee payment|Year of fee payment: 2 |
    2017-12-19| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-20| TP| Transmission of property|Owner name: SEG AUTOMOTIVE GERMANY GMBH, DE Effective date: 20180315 |
    2018-09-21| PLSC| Publication of the preliminary search report|Effective date: 20180921 |
    2018-12-18| PLFP| Fee payment|Year of fee payment: 4 |
    2019-12-17| PLFP| Fee payment|Year of fee payment: 5 |
    2020-12-21| PLFP| Fee payment|Year of fee payment: 6 |
    2021-12-20| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014226224.0|2014-12-17|
    DE102014226224.0A|DE102014226224A1|2014-12-17|2014-12-17|Method for forming at least one U-shaped winding element for an electromagnetically excitable core of a rotary electric machine|
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