JP2009303337A - Device and method for coil shaping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and method for coil shaping wherein when a coil is shaped, the coil can be prevented from climbing over interphase paper. <P>SOLUTION: The coil shaping device 10 includes: preliminary shaping dies 30, 30 that raise coil ends 21a, 21b in the direction of the axis of a stator; and finish shaping dies 40, 40 that shape the coil ends 21a, 21b preliminarily shaped by the preliminary shaping dies 30, 30 into their final shape. The preliminary shaping dies 30, 30 are provided with controlling members 34, 34 that, when the coil ends 21a, 21b are raised in the direction of the axis of the stator, controls the height of the coil ends so that it becomes lower than the height of interphase paper 50 inserted into between coil phases. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coil shaping apparatus and method for shaping coil ends protruding from both end faces of a stator core among coils inserted in slots of a stator core. More specifically, the present invention relates to a coil shaping device and method for shaping a coil end of a coil provided in a stator in which a plurality of phase coils are inserted into a slot via an interphase paper.

  Conventionally, there is a method of assembling a stator by inserting a coil, in which windings are wound in advance, sequentially into a slot formed in a stator core via a phase sheet for each phase. Of the coils inserted into the slots of the stator core, the coils are shaped so that coil ends protruding from both end faces of the stator core do not interfere with the motor case or the rotor during motor assembly. Here, in order to reduce (shorten) the coil height (length in the stator axial direction) in order to reduce the size of the motor, the coil end is pressed in the stator axial direction to reduce the coil shape.

As such a technique, there is one described in Patent Document 1, for example. In the technique described here, the coil end is pressed from the outer diameter side and the upper surface side while supporting the coil end on the stator inner diameter side, and the coil end is shaped compactly.
JP 2005-80357 A

  However, in the conventional technique described above, when the coil end is pressed from the outer diameter side, as shown in FIG. 9, if the coil 100 of any phase becomes higher than the interphase paper 50, the upper surface side ( When pressed from the stator axial direction, the coil 100 may get over the interphase paper 50. If the coil 50 gets over the interphase paper 50 as shown in FIG. 10 after coil shaping, interphase insulation cannot be ensured and insulation failure may occur. For this reason, if the coil gets over the interphase paper after coil shaping, it is necessary to manually correct the coil. And there was a problem that the correction work took time.

  Therefore, the present invention has been made to solve the above-described problems, and provides a coil shaping device and method capable of preventing the coil from getting over the interphase paper when shaping the coil. Let it be an issue.

  The coil shaping device according to the present invention, which has been made to solve the above problems, is a coil shaping device for shaping each coil end protruding from both end faces of the stator core among coils inserted in slots of the stator core. A pre-shaping mold that raises the end in the stator axial direction; and a finish-shaping mold that shapes the coil end that has been pre-shaped by the pre-shaping mold into a final shape. A restriction member is provided for restricting the height of the coil end to be lower than the height of the interphase paper inserted between the coil phases when it is raised in the axial direction.

  And in the coil shaping apparatus according to the present invention, the preliminary shaping mold has an inner shaping mold for pressing the coil end from the inner diameter side, and an outer shaping mold for pressing the coil end from the outer diameter side, The finish shaping mold preferably includes an inner / outer diameter regulating mold for regulating the inner / outer diameter of the coil end and an axial shaping mold for pressing the coil end in the stator axial direction.

  In this coil shaping device, the coil end is raised in the stator axial direction by the pre-shaping mold, and the coil is pre-shaped. Specifically, the coil end is pressed from the inner diameter side by the inner shaping die and the coil end is pressed from the outer diameter side by the outer shaping die, whereby the coil end is raised in the stator axial direction.

  At this time, the height of the coil end may be higher than the interphase paper. However, in the preliminary shaping type of this coil shaping device, when the coil end is raised in the stator axial direction, the height of the coil end is restricted to be lower than the height of the interphase paper inserted between the coil phases. A restricting member is provided. For this reason, the restriction member prevents the height of the coil end from becoming higher than that of the interphase paper. Thereby, when the coil end is raised in the stator axial direction by the pre-shaping mold, the height of the coil end does not become higher than that of the interphase paper.

  Then, the pre-shaped coil end is finished and shaped into a final shape by a finish shaping mold. Specifically, in a state where the inner and outer diameters of the coil end are regulated by the inner and outer diameter regulating mold, the coil end is pressed in the stator axial direction by the axial shaping mold and finished and shaped. Thus, in finish shaping, the coil end is pressed in the stator axial direction while the inner and outer diameters of the coil end raised in the stator axial direction are regulated in a state where the height of the coil end is lower than the interphase paper, The coil is reliably prevented from getting over the interphase paper. Accordingly, interphase insulation can be ensured after the finish shaping of the coil without correcting the coil shaping manually. As a result, the stator production efficiency can be improved.

  Here, when the coil end is raised in the stator axial direction, the coil end is lowered so that the height of the coil end is lower than that of the interphase paper without contacting the regulating member over the entire end surface of the coil end in the stator axial direction. It can be raised in the stator axial direction. However, in such a case, there is a possibility that a space is created in the pre-shaped mold by providing the regulating member, and the coil enters (squeezes) the space during the pre-shaping of the coil, and the coil or the covering may be damaged. is there.

  Therefore, in the coil shaping device according to the present invention, when the coil end is raised in the stator axial direction, the regulating member is provided in the preliminary shaping mold so as to contact the entire end surface in the stator axial direction of the coil end. Yes.

  With such a configuration, the coil end can be raised in the stator axial direction so that the height of the coil end is lower than that of the interphase paper without damaging the coil or the cover at the time of preliminary shaping of the coil.

  The coil shaping method according to the present invention made to solve the above-described problem is a coil shaping method for shaping each coil end protruding from both end faces of the stator core among the coils inserted into the slots of the stator core. Pre-pressing the end from the inner diameter side and the outer diameter side and starting up in the stator axial direction, and pressing the coil end pre-shaped in the preliminary shaping step in the stator axial direction while regulating the inner and outer diameters A finishing shaping step for shaping into a final shape, and in the preliminary shaping step, the height of the coil end is regulated to be lower than the height of the interphase paper inserted between the coil phases. To do.

  In this coil shaping method, the coil end is preliminarily pressed from the inner diameter side and the outer diameter side in the preliminary shaping step, and is raised in the stator axial direction. At this time, the coil is shaped so that the height of the coil end is lower than the height of the interphase paper inserted between the coil phases. Then, in the finishing shaping process, the coil end is pressed in the stator axial direction while regulating the inner and outer diameters of the coil end raised in the stator axial direction with the coil end height lower than the interphase paper. Shape it into a shape. Therefore, it is possible to reliably prevent the coil from getting over the interphase paper after finishing shaping. As a result, interphase insulation can be ensured after the finish shaping without manually correcting the coil shaping, so that the production efficiency of the stator can be improved.

  According to the coil shaping apparatus and method according to the present invention, it is possible to prevent the coil from getting over the interphase paper when shaping the coil.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a most preferred embodiment embodying a coil shaping apparatus and method of the invention will be described in detail with reference to the drawings. Here, the case where this invention is applied to the coil shaping of a three-phase stator is illustrated.

  First, the coil shaping device according to the present embodiment will be described with reference to FIG. FIG. 1 is a front view showing a schematic configuration of a coil shaping device according to an embodiment. As shown in FIG. 1, the coil shaping device 10 includes a holding unit 11 that holds the stator 20, and shaping units 12 and 13 that shape a coil 21 provided in the stator 20.

  The holding unit 11 includes two holding members 11 a and 11 b that are provided on a support column 16 provided on the base 15 and extend in the horizontal direction. The stator 20 is conveyed to the holding unit 11 by a core conveying device provided separately. The conveyed stator 20 is set in the coil shaping device 10 by the holding members 11a and 11b.

  The shaping sections 12 and 13 include a preliminary shaping mold 30 and a finishing shaping mold 40 in order to perform preliminary shaping and finish shaping of the coil 21 of the stator 20 set in the holding section 11. Since FIG. 1 shows a state before the pre-shaping is performed, the pre-shaping molds 30 and 30 are shown in the shaping portions 12 and 13. The shaping portion 12 shapes the coil end 21 a of the stator 20 held by the holding portion 11, and is provided on the upper plate 17 supported by the base 15 via the support column 16. The shaping unit 12 can be moved up and down with respect to the upper plate 17. On the other hand, the shaping unit 13 shapes the coil end 21 b of the stator 20 held by the holding unit 11, and is provided on the lower plate 18 disposed on the base 15. The shaping unit 13 can be moved up and down with respect to the lower plate 18.

  Here, the preliminary shaping mold 30 provided in the shaping units 12 and 13 will be described with reference to FIGS. FIG. 2 is a perspective view showing a schematic configuration of the pre-shaping type. FIG. 3 is a cross-sectional view showing a schematic configuration of the pre-shaping type. FIG. 4 is a diagram for explaining the pre-shaped operation. FIG. 5 is a schematic diagram showing a coil end shape after preliminary pressing by a preliminary shaping mold. As shown in FIGS. 2 and 3, the preliminary shaping mold 30 includes a main body portion 31, an inner shaping mold 32, an outer shaping mold 33, and a regulating member 34. Then, the preliminary shaping mold 30 is attached to the shaping parts 12 and 13 by fixing the main body part 31 to the shaping parts 12 and 13.

  The inner shaping mold 32 preliminarily presses the coil ends 21a and 21b of the stator 20 from the inner diameter side. The inner shaping mold 32 is provided inside the main body 31 so as to be movable in the stator radial direction (left and right direction in FIG. 3). The outer shaping die 33 preliminarily presses the coil ends 21a and 21b of the stator 20 from the outer diameter side. The outer shaping die 33 is provided on the outer side of the main body 31 so as to be movable in the stator radial direction (left-right direction in FIG. 3). That is, the inner shaping mold 32 and the outer shaping mold 33 are provided in the main body 31 so as to be close to or away from each other. Then, as shown in FIG. 4, when the inner shaping mold 32 and the outer shaping mold 33 are close to each other and the coil ends 21a and 21b are preliminarily pressed from both sides, the coil ends 21a and 21b are moved as shown in FIG. It starts up in the stator axial direction. In the present embodiment, the preliminary shaping mold 30 is provided with six inner shaping molds 32 and four outer shaping molds 33.

  The regulating member 34 is a resin member that regulates the height of the coil ends 21 a and 21 b that are pre-pressed by the inner shaping die 32 and the outer shaping die 33 and are raised in the stator axial direction. The regulating member 34 has a main body so that the height of the coil ends 21a and 21b is lower than the height of the interphase paper 50 (see FIG. 5) inserted between the coils 21 of the stator 20 (height from the stator core). The unit 31 is provided. This prevents the coil ends 21a, 21b from being higher than the interphase paper 50 when the coil ends 21a, 21b are pre-pressed and raised in the stator axial direction.

  In addition, the regulating member 34 is provided in the main body 31 so as to contact the entire end surface in the stator axial direction of the coil ends 21a and 21b during the preliminary pressing by the inner shaping die 32 and the outer shaping die 33. Furthermore, the regulating member 34 is also provided in a region where the inner shaping mold 32 and the outer shaping mold 33 move. As a result, the restriction member 34 is provided in the main body 31 so that no space is formed in the portion where the coil ends 21 a and 21 b abut. For this reason, it is possible to prevent the coil 21 or the coating from being damaged due to being sandwiched or the like during preliminary pressing by the preliminary shaping mold 30. In the present embodiment, when the outer shaping die 33 moves, a part of the regulating member 34 also moves with the outer shaping die 33. However, since the regulating member 34 is made of resin, the coil 21 The coating is not damaged.

  Next, the finish shaping mold 40 provided in the shaping units 12 and 13 will be described with reference to FIGS. FIG. 6 is a diagram illustrating a finish shaping type state before finish shaping. FIG. 7 is a diagram illustrating a finish shaping type state after finish shaping. As shown in FIGS. 6 and 7, the finish shaping mold 40 includes an inner and outer diameter regulating mold 41 and an axial shaping mold 42. Then, the finish shaping die 40 is attached to the shaping portions 12 and 13 by fixing the inner and outer diameter regulating die 41 to the shaping portions 12 and 13.

  The inner / outer diameter regulating die 41 regulates unnecessarily changes in the inner and outer diameters of the coil ends 21a and 21b when the coil 21 is pressed by the axial shaping die 42 so that the inner and outer diameters of the coil ends 21a and 21b have predetermined dimensions. Is for. The axial shaping die 42 presses the coil ends 21a and 21b set in the inner and outer diameter regulating die 41 as shown in FIG. 6 in the stator axial direction (vertical direction in the figure) as shown in FIG. It is for shaping into the final shape.

  Next, a method for shaping the coil 21 (coil ends 21a, 21b) by the coil shaping device 10 described above will be described. The coil 21 is shaped by the coil shaping device 10 after the preliminary shaping process by the preliminary shaping mold 30 is performed, and then the finishing shaping process by the finishing shaping mold 40 is performed to be shaped into the final shape.

  First, in the preliminary shaping step, the stator 20 is conveyed to the coil shaping device 10 by a core conveying device (not shown), and is set in the coil shaping device 10 by the holding members 11a and 11b as shown in FIG. Preliminary shaping molds 30 and 30 provided in the shaping portions 12 and 13 are disposed above and below the stator 20 set in the coil shaping device 10. From this state, the pre-shaping molds 30 and 30 move toward the stator 20. As a result, the coil ends 21 a and 21 b are positioned in the preliminary shaping molds 30 and 30.

  Then, as shown in FIG. 4, the inner shaping mold 32 and the outer shaping mold 33 provided in each preliminary shaping mold 30 move so as to be close to the coil ends 21a and 21b. The inner shaping mold 32 preliminarily presses the coil ends 21a and 21b from the inner diameter side, and the outer shaping mold 33 preliminarily presses the coil ends 21a and 21b from the outer diameter side. As a result, the coil ends 21a and 21b are preliminarily pressed from both the inner and outer diameter sides, and the coil end 21a (21b) is raised in the stator axial direction as shown in FIG.

  At this time, the height of the coil ends 21a and 21b is regulated by the regulating member 34 so as to be lower than the height of the interphase paper 50 inserted between the coil phases. Therefore, when the coil ends 21a and 21b are raised in the stator axial direction in the preliminary shaping process, the height of the coil end 21a (21b) does not become higher than the interphase paper 50 as shown in FIG. .

  Thereafter, the inner shaping mold 32 and the outer shaping mold 33 are moved away from the coil ends 21a and 21b, and the state shown in FIG. 3 is restored. Each preliminary shaping mold 30 moves up and down away from the stator 20 and returns to the state shown in FIG. This completes the preliminary shaping step, and then the finishing shaping step is performed.

  In the finishing shaping step, preliminary shaping dies 40 and 40 provided in the shaping portions 12 and 13 are arranged above and below the stator 20 that is set in the coil shaping device 10 and preliminarily shaped. Then, the finish shaping molds 40, 40 move toward the stator core 20 from this state. Accordingly, as shown in FIG. 6, the coil ends 21 a and 21 b are positioned in the inner and outer diameter regulating dies 41 and 41 provided in the finish shaping dies 40 and 40.

  Then, the axial direction shaping dies 42, 42 provided in the finish shaping dies 40, 40 move, and the coil ends 21a, 21b set in the inner and outer diameter regulating dies 41, 41 are replaced with the stator shaft as shown in FIG. Press in the direction (vertical direction in the figure). Thereby, the coil ends 21a and 21b are pressed in the stator axial direction in a state where the inner and outer diameters are regulated, and the coil ends 21a and 21b are shaped into a final shape.

  Thus, in the finish shaping step, the inner and outer diameters of the coil ends 21a and 21b raised in the stator axial direction in the preliminary shaping step with the coil end height being lower than the interphase paper 50 are regulated, while the coil end 21a. , 21b are pressed in the stator axial direction. Thereby, as shown in FIG. 8, in the coil end 21a (21b) after finishing shaping, any phase of the coil 21 does not get over to another phase. That is, it is reliably prevented that each phase coil gets over the interphase paper 50. As a result, the interphase insulation of each phase coil can be ensured without performing manual coil shaping correction after the finishing shaping step, so that the production efficiency of the stator can be improved. In addition, FIG. 8 is a figure which shows the coil end shape after finish shaping.

  As described above, according to the coil shaping device 10 according to the present embodiment, the heights of the coil ends 21a and 21b are restricted to the preliminary shaping mold 30 that raises the coil ends 21a and 21b in the stator axial direction. A regulating member 34 is provided. For this reason, when the coil ends 21a and 21b are pre-pressed and raised in the stator axial direction in the pre-shaping step, the height of the coil ends 21a and 21b is reliably prevented from becoming higher than the interphase paper 50. The In the finishing shaping step, the inner and outer diameters of the coil ends 21a and 21b raised in the stator axial direction are regulated by the respective finishing shaping molds 40 in a state where the height of the coil ends is lower than the interphase paper 50. Ends 21a and 21b are pressed in the stator axial direction. Accordingly, the coil ends 21 a and 21 b can be shaped into the final shape without any phase of the coil 21 getting over the interphase paper 50.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.

It is a front view which shows schematic structure of the coil shaping apparatus which concerns on embodiment. It is a perspective view which shows schematic structure of a preliminary shaping type | mold. It is a cross section showing a schematic configuration of a pre-shaped type. It is a figure explaining operation | movement of a preliminary shaping type | mold. It is a schematic diagram which shows the coil end shape after the preliminary press by a preliminary shaping type | mold. It is a figure which shows the state of the finishing shaping type | mold before finishing shaping. It is a figure which shows the state of the finishing shaping type | mold after finishing shaping. It is a figure which shows the coil end shape after finishing shaping. It is a schematic diagram which shows the coil end shape after the conventional preliminary press. It is a figure which shows the coil end shape after the conventional finish shaping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coil shaping apparatus 11 Holding part 12 Shaping part 13 Shaping part 20 Stator 21 Coil 21a Coil end 21b Coil end 30 Preliminary shaping type 31 Main body part 32 Inner shaping type 33 Outer shaping type 34 Restricting member 40 Finish shaping type 41 Inner / outer diameter regulating type 42 Axial Shaping Type 50 Interphase Paper

Claims (4)

Of the coils inserted into the slots of the stator core, in the coil shaping device for shaping each coil end protruding from both end faces of the stator core,
A pre-shaping mold for raising the coil end in the stator axial direction;
A finish shaping mold for shaping the coil end preliminarily shaped in the preliminary shaping mold into a final shape;
The preliminary shaping type includes a regulating member that regulates the height of the coil end to be lower than the height of the interphase paper inserted between the coil phases when the coil end is raised in the stator axial direction. A coil shaping device. The coil shaping device according to claim 1,
The said shaping member is provided in the said preliminary shaping type | mold so that it may contact | abut to the stator axial direction end surface whole region of the said coil end, when raising the said coil end to a stator axial direction. In the coil shaping device according to claim 1 or 2,
The preliminary shaping mold has an inner shaping mold that presses the coil end from the inner diameter side, and an outer shaping mold that presses the coil end from the outer diameter side,
The finish shaping mold includes an inner / outer diameter regulating mold for regulating the inner / outer diameter of the coil end and an axial shaping mold for pressing the coil end in the stator axial direction. Among the coils inserted into the slots of the stator core, in the coil shaping method of shaping each coil end protruding from both end faces of the stator core,
A preliminary shaping step in which the coil end is preliminarily pressed from the inner diameter side and the outer diameter side to rise in the stator axial direction;
A finishing shaping step of shaping the coil end preliminarily shaped in the preliminary shaping step into the final shape by pressing in the stator axial direction while regulating the inner and outer diameters,
In the preliminary shaping step, the coil shaping method is characterized in that the height of the coil end is regulated to be lower than the height of the interphase paper inserted between the coil phases.

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