JP2020110025A - Segment coil molding method - Google Patents

Abstract

To prevent an indentation from being generated in a segment coil in the step of reducing a physical constitution of the twist-molded segment coil in manufacturing a stator to be used for a motor.SOLUTION: A segment coil molding method of the present invention includes pressing a twist-molded segment coil 30 with a jig of which a face 301 opposed to the segment coil 30 is formed flat. The segment coil molding method is characterized by preventing generation of an indentation in the segment coil by reducing a physical constitution of the segment coil 30.SELECTED DRAWING: Figure 1

Description

The present invention relates to a segment coil forming method.

In a segment type coil motor, a stator is manufactured by inserting a segment coil into a slot provided in a stator core, twisting the tip of the segment coil, and joining their ends. For example, Patent Document 1 describes an example in which the end portions of the segment coils that are inserted into the slots of the stator core and twist-formed are joined.

In the twist forming process of the stator manufacturing process of the segment coil, in order to join the ends of the coils, a jig called a crown is used so that the positions of the ends are aligned. At present, efforts are being made to reduce the coil size after molding in order to reduce the cost of the stator core.

JP, 2013-172575, A

In the conventional crown shape, there is a problem that the crown wire and the coil wire are excessively interfered with each other when the molding is performed, resulting in a defect such as an indentation on the coil wire side. That is, when twisting the ends of the segment coil, if the conventional crown shape is used to shape the physique to the desired height, part of the crown may excessively interfere with the coil, resulting in indentations on the coil side. It was

In the segment coil forming method of the present embodiment, the segment coil formed by twisting is pressed by a jig whose surface facing the segment coil has a flat shape to reduce the size of the segment coil.

As described above, according to the segment coil forming method of the present embodiment, since the twist-formed segment coil is pressed by the jig whose surface facing the segment coil is flat, the stress can be dispersed.

According to the segment coil forming method of the present invention, it is possible to prevent an indentation from being generated in the segment coil.

It is a top view of a stator of this embodiment. FIG. 4 is an enlarged perspective view from the inner circumference side of the coil end portion lead side of the stator of the present embodiment. It is a top view of a segment of this embodiment. It is a flowchart which shows the outline of the assembly process of a stator of this embodiment. (A) It is a schematic perspective view of a stator core. (B) It is a schematic perspective view which equips a stator core with the insulator. (C) It is a schematic perspective view of a segment. (D) A schematic cross-sectional view showing how a segment is inserted in the stator core. (E) It is sectional drawing which showed the mode that the segment was welded. It is a flow diagram of an assembly process of a stator of this embodiment. FIG. 4 is a plan cross-sectional view of a state in which a slot inner conductor portion is inserted in a slot of a stator core according to the present embodiment. FIG. 4 is an enlarged cross-sectional view of a slot portion of the present embodiment in which a slot of the stator core has an in-slot conductor portion. FIG. 4 is a side cross-sectional view of the slot portion of the present embodiment in a state where the slot inner conductor portion is inserted in the slot of the stator core. It is a partial perspective view of the lead side of the stator of the present embodiment as seen from the outer peripheral side. It is a side surface sectional view showing a situation where a connecting wire part of this embodiment was held by a 1st twist ring jig. It is a side surface sectional view showing the situation where the connection line part of this embodiment was twisted by the 1st twist ring jig. It is a side sectional view showing a state where a tip of a lead of this embodiment is held by the 2nd twist ring jig. It is a side sectional view showing the situation where the tip part of the lead of this embodiment was twisted by the 2nd twist ring jig. It is sectional drawing which shows the segment coil and jig in the segment coil forming method of this Embodiment. It is sectional drawing which shows the segment coil and jig in the conventional segment coil shaping|molding method. It is sectional drawing which shows the shape change and indentation generation by the conventional segment coil forming method.

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In the present embodiment, as an example, a case where the present invention is applied to manufacture of a stator used for a drive motor of a hybrid vehicle will be described. However, the present invention is not limited to the following embodiments. Further, the following description and the drawings are appropriately simplified to clarify the explanation.

First, the assembly process of the stator will be described, and then the twist forming process of reducing the physique of the segment coil in the present embodiment will be described.

FIG. 1 shows a plan view of the stator 10 of this embodiment. FIG. 2 shows an enlarged perspective view of the stator 10 on the coil end portion lead side. The stator 10 has a stator core 20 and a segment coil 30. The stator core 20 formed by stacking electromagnetic steel sheets having a substantially cylindrical shape has teeth 21 formed so as to project inward and a slot 22 in which a segment 31 described later is housed between adjacent teeth 21. It is configured to be provided.

The number of teeth 21 is 48, and the number of slots 22 is also 48. A rib 23 and a bolt hole 23a are provided on the outer peripheral side of the stator core 20. Then, by using this, a case or the like can be attached. An insulator 25 having an insulating property is inserted into the slot 22. The insulator 25 is housed in the slot 22 in a substantially U shape and is in a state of wrapping the in-slot conductor wire portion 31b of the segment coil 30 to ensure insulation between the segment coil 30 and the stator core 20. The state shown in FIG. 7, which will be described later, is the final shape of the insulator 25, and is the state in which the inner peripheral side of the stator core 20 is folded and pressed by the wedge paper 33.

FIG. 3 shows a plan view of the segment 31. A segment 31 is formed by edgewise bending the flat conductor D into a substantially U shape. The segment 31 is a component forming the segment coil 30. The segment 31 is composed of three parts, and has an in-slot conductor portion 31b inserted into the slot 22 of the stator core 20, a lead tip portion 31a protruding from the end surface of the stator core 20 on the lead side of the stator 10, and an anti-lead portion 31c. .. For convenience, the lead tip portion 31a is referred to as a first side lead portion 31aA and a second side lead portion 31aB separately. Further, the in-slot conductor portion 31b is referred to as a first-side in-slot conductor portion 31bA and a second-side-in-slot conductor portion 31bB separately. The anti-lead portion 31c is composed of a crank portion 31e, a first side oblique side portion 31dA and a second side oblique side portion 31dB. Although not shown in FIG. 3, the first side lead portion 31aA and the second side lead portion 31aB are provided with a peeling portion 31i, which will be described later, after being peeled off.

The segments 31 are annularly arranged by an unillustrated aligning machine. A state in which the segments 31 are arranged in a ring shape and before being inserted into the stator core 20 is referred to as a ring-shaped assembly 32. The annular coil assembly 32 is inserted into the slot 22 of the stator core 20, and the lead tip portion 31a is twisted and then welded to form a coil, which is the segment coil 30. The stator core 20 including the segment coils 30 is the stator 10 shown in FIGS. 1 and 2. The external connection terminal 40 is joined to the segment coil 30. The external connection terminal 40 has a function of being electrically connected to a battery (not shown) mounted on the vehicle.

FIG. 4 shows an outline of the assembly process of the stator 10. FIG. 4A shows a perspective view of the stator core 20. FIG. 4B shows a perspective view in which the stator core 20 is provided with the insulator 25. FIG. 4C shows a perspective view of the segment 31. FIG. 4D is a sectional view showing how the segment 31 is inserted into the stator core 20. FIG. 4(e) is a sectional view showing how the segment 31 is welded. The perspective view shown in FIG. 4 has a simplified shape for the sake of explanation. The segment 31 shown in FIG. 4(c) is inserted into the slot 22 formed in the stator core 20 shown in FIG. 4(a) with the insulator 25 inserted therein as shown in FIG. 4(b).

As a result, the state shown in FIG. That is, the segment 31 partially projects from the end of the stator core 20, and the first-side lead portion 31aA and the second-side lead portion 31aB project. Then, the first side lead portion 31aA and the second side lead portion 31aB are twisted and the tips are welded to form the welded portion 31f as shown in FIG. 4E, thereby forming the stator 10. Although FIG. 4 conceptually illustrates the forming process of the stator 10, the actual assembling process requires an aligning process for arranging the segments 31 in an annular shape.

FIG. 5 shows a flow chart of the assembly process of the stator 10. In S1, "straightening and cutting of the rectangular conductor" is performed. Since the rectangular conductor D is wound on a bobbin (not shown), the rectangular conductor D is unwound to remove the peculiarity and then cut into a required length. In S2, "segment formation" is performed. The rectangular conductor D is subjected to edgewise bending, and a crank portion 31e is formed using a die (not shown) to obtain a substantially U-shaped segment 31. In S3, "segment alignment" is performed. The segment 31 is arranged in a cylindrical shape by combining the crank portions 31e of the segment 31 so that the slot 22 of the stator core 20 can accommodate 10 of the first-side slot inner conductor portions 31bA or the second-side slot inner conductor portions 31bB. The coil 30 is formed.

In S4, "insulator insertion" is performed. An insulator 25 is provided in each slot 22 of the stator core 20 for the purpose of insulating the stator core 20 and the segment coil 30. In this step, the insulator 25 is inserted into the slot 22. In S5, "segment coil insertion" is performed. Strictly speaking, it is a step of bringing the annular assembly 32, which is in a state before it becomes the segment coil 30, close to the stator core 20, and inserting the lead tip portion 31 a into the slot 22 provided with the insulator 25. After this process, 10 slots of the in-slot conductor portions 31b are inserted into each slot 22. For convenience sake, the in-slot conductor portion 31b is arranged from the inner peripheral side of the stator core 20 from the first layer conductor portion 31b1, the second layer conductor portion 31b2, the third layer conductor portion 31b3, the fourth layer conductor portion 31b4, and the fifth layer conductor portion 31b5. , Sixth layer conductor portion 31b6, seventh layer conductor portion 31b7, eighth layer conductor portion 31b8, ninth layer conductor portion 31b9, and tenth layer conductor portion 31b10.

In S6, "wedge insertion" is performed. FIG. 6 is a cross-sectional view showing a state where the slot inner conductor portion 31b is inserted in the slot 22 of the stator core 20. FIG. 7 shows an enlarged cross-sectional view of the slot 22 portion in a state where the slot 22 of the stator core 20 has the slot inner conductor portion 31b. FIG. 7 is an enlarged view of portion A shown in FIG. The wedge paper 33 is inserted into the innermost peripheral side of the stator core 20 in a state where ten in-slot conductor portions 31b of the segment 31 are inserted into the slots 22. The wedge paper 33 is held by being stretched by a convex portion 21 a provided at the tip of the tooth 21 so as to project into the slot 22. The wedge paper 33 has a function of pressing the tip of the bent insulator 25, and plays a role of a spacer that eliminates a gap in the slot 22.

In S7, "pre-twist formation" is performed. The annular assembly 32 inserted into the stator core 20 is in a state where the anti-lead portion 31c of the segment 31 overlaps on the anti-lead side and projects to the coil end of the stator core 20, and the lead tip 31a of the segment 31 on the lead side. It is in a state of protruding to the coil end of the stator core 20. A part of the lead tip portion 31a of the annular assembly 32 is bent and pulled out to the outer peripheral side of the stator core 20 as a power line portion 31x. Next, the connection line portion 31y adjacent to the power line portion 31x is twisted. This step will be described later.

In S8, "twist formation" is performed. The lead tip portion 31a of the segment coil 30 inserted in the stator core 20 is twisted in the radial direction of the stator core 20, and is deformed into a shape in which adjacent coils are connected to each other. As for the twisting direction of the lead tip portions 31a, as shown in FIG. 2, the lead tip portions 31a adjacent in the radial direction are twisted in different directions. In S9, "Tig welding" is performed. As shown in FIG. 4E, the adjacent lead tip portions 31a are welded to each other to form a welded portion 31f. At this time, the connection terminal 41 shown in FIG. 1 is also welded. In S10, "coil end part insulation processing" is performed. This is a step of applying an insulating coating to the welded portion 31f, which is an insulating coating using resin by powder coating. Further, by impregnating the segment coil 30 with a varnish, the segment coil 30 is fixed so that the segment coil 30 does not move with respect to the stator 10 due to vibration or the like transmitted from the vehicle body or the like during operation of the stator 10.

The stator 10 is assembled according to the above flow. Next, the "formation before twisting" in S7 and the "twisting step" in S8 described above will be described in detail. In this step, pre-twist processing of the lead tip portion 31a is performed by two procedures, a "power line processing step" and a "pre-twist step". Then, the "twisting process" of S8 is performed.

First, the "power line processing step" will be described. FIG. 8 shows an enlarged cross-sectional side view of the slot 22 in which the slot inner conductor portion 31b is inserted into the slot 22 of the stator core 20. FIG. 8 corresponds to the BB cross section shown in FIG. When the annular assembly 32 is inserted into the slot 22 of the stator core 20, the state shown in FIG. 8 is obtained. At the coil end on the lead side of the stator 10, a lead tip portion 31a projects in a stepwise manner. For convenience, the lead tip portion 31a is arranged from the inner peripheral side of the stator core 20 to the first layer tip portion 31a1, the second layer tip portion 31a2, the third layer tip portion 31a3, the fourth layer tip portion 31a4, the fifth layer tip portion 31a5. These are referred to as the sixth layer tip portion 31a6, the seventh layer tip portion 31a7, the eighth layer tip portion 31a8, the ninth layer tip portion 31a9, and the tenth layer tip portion 31a10.

The length of the lead tip portion 31a from the end surface of the stator core 20 is the shortest in the first layer tip portion 31a1, is set to be gradually longer toward the outer peripheral side of the stator core 20, and is set to be the longest in the tenth layer tip portion 31a10. , Are set in a staircase. This is because, when the lead tip portion 31a is twisted and welded, the welded portions 31f are radially arranged on the end surface of the stator 10, so that it is necessary to lengthen the one that is arranged on the outer periphery of the stator core 20. Is.

FIG. 9 is a partial perspective view of the lead side of the stator 10 as seen from the outer peripheral side. Of the tenth layer tip portion 31a10, a part of the lead tip portion 31a having a different length is used as a power line portion 31x. Three power line portions 31x are provided for each stator 10. The tenth layer tip portion 31a10 to be the power line portion 31x is bent toward the outer peripheral side of the stator core 20 using a jig (not shown), and the tip of the power line portion 31x is further bent toward the axial direction of the stator core 20. As a result, as shown in FIG. 9, the power line portion 31x is bent from the upper portion of the slot 22 to the outer peripheral side of the stator core 20, and rises from the outer extending portion of the stator core 20 so as to project in the axial direction of the stator core 20. .. As shown in FIG. 1, the power line portion 31 x is provided so that the lead tip portions 31 a at three locations are bent toward the outer peripheral side of the stator 10 and are connected to the external connection terminals 40.

Next, the “pre-twisting step” will be described. The “pre-twisting step” corresponds to the first twisting step. FIG. 10 is a side sectional view showing a state in which the connecting wire portion 31y is held by the first twisting annular jig J10. FIG. 11 is a side sectional view showing a situation where the connecting wire portion 31y is twisted by the first twisting annular jig J10. 10 and 11 schematically show a state from the outer peripheral side surface of the stator 10, and the pitch of the lead tip portions 31a is different because it is actually an annular shape, but here the pitch is equal. It is drawn as. The connection line portion 31y is the tenth layer tip portion 31a10 provided next to the power line portion 31x. After the connection line portion 31y is twisted, the connection line portion 31y is housed in a slot 22 different from the connection line portion 31y and is Tig welded to the twisted ninth layer tip portion 31a9. In the segment coil 30 of this embodiment, the segments 31 are arranged in a cylindrical shape to form a cage, and have U1 phase, U2 phase, V1 phase, V2 phase, W1 phase, and W2 phase. The connecting line portion 31y connects the U1 phase and the U2 phase, the V1 phase and the V2 phase, and the W1 phase and the W2 phase.

Next, the first twisting annular jig J10 will be described. The first twisting annular jig J10 is provided with a distal end holding portion J12 on an annular trunk portion J11. The tip holding portion J12 is provided with two protrusions J13 at an interval into which the tip of the lead tip portion 31a can be inserted, and a holding portion J14 that holds the lead tip portion 31a between the protrusions J13 is provided. The tip holding portion J12 is provided at three places on the trunk portion J11, and the lead tip portion 31a is twisted as the trunk portion J11 rotates about its axis and advances in the axial direction of the stator core 20. The length of the protrusion J13 is set so that the trunk portion J11 does not interfere with the tip of the lead tip portion 31a when the pre-twisting process is performed.

Next, the cuffer J30 inserted along the end surface of the stator core 20 will be described. The cuffs J30 are arranged at a predetermined pitch in the radial direction of the stator core 20, and are held by an annular pallet J35 having sliding grooves (not shown). Since the stator core 20 is arranged at the center of the annular pallet J35, the cuffer J30 is inserted from the outer peripheral direction of the stator core 20 toward the inner periphery along the end surface of the stator core 20. The cuffer J30 has a bottom surface J301 whose one surface is in contact with the end surface of the stator core 20, and has a cross section of a shape obtained by cutting an ellipse into pieces.
The lead wire support surface J32 connected to the bottom surface J301 has a function of supporting the lead tip 31a to be twisted. With the cuffer J30 inserted in the upper portion of the tooth 21 along the end surface of the stator core 20, the lead tip portion 31a is twisted.

The tenth layer tip portion 31a10 that serves as the connecting line portion 31y is the tenth layer tip portion 31a10 that is arranged next to the power line portion 31x. That is, the tenth layer tip portion 31a10 arranged in the slot 22 adjacent to the power line portion 31x is used as the connection line portion 31y. The tenth layer tip portion 31a10 serving as the connecting line portion 31y is set to be slightly shorter than the other tenth layer tip portion 31a10, and the tip holding portion of the first twisting annular jig J10 is capable of holding this. The length of the protrusion J13 of J12 is determined. By this tip holding portion J12, the tenth layer tip portion 31a10 to be the connecting line portion 31y is held, and as shown in FIG. 10, the first twisting annular jig J10 is rotated toward the power line portion 31x to connect. The line portion 31y is twisted.

Next, the “twisting step” will be described. The “twisting step” corresponds to the second twisting step and is the step described in S8 above. FIG. 12 is a side sectional view showing a state in which the tip of the lead is held by the second twist ring jig. FIG. 13 is a side sectional view showing a situation in which the tip of the lead is twisted by the second twisting ring jig. Also in FIGS. 12 and 13, as in FIGS. 10 and 11, the lead tip portions 31a are shown at equal pitches. First, the second twisting annular jig J20 will be described. The second twisting annular jig J20 is composed of a plurality of annular jigs having different diameters, and the outermost peripheral trunk portion J21 is shown in FIGS. 12 and 13. As shown in FIG. 7, the stator 10 of the present embodiment has a configuration in which the slot 22 has 10 in-slot conductor portions 31 b. Therefore, it is necessary that the trunks of the annular shape are prepared so as to overlap with each other by 10 layers, and the trunks are rotatably provided in different directions. A plurality of tip holding portions J22 are arranged and provided at the tip of each trunk.

Two types of tip holding portions J22 are prepared: a general wire holding portion J221 and a connection wire holding portion J222, and the connection wire holding portions J222 are provided at only three locations at the tip of the outermost peripheral trunk portion J21. Further, a blank J223 is provided next to the connection line holding portion J222. This blank J223 corresponds to the position next to the power line portion 31x. The general wire holding portion J221 is formed so that the projections J231 adjacent to each other hold the tip of one lead tip portion 31a. The connection wire holding portion J222 is formed so as to hold the tip of the connection wire portion 31y by the two projections J232. In addition, in the outermost peripheral trunk portion J21, a portion of the general wire holding portion J221 is provided with a portion that holds the tip of the lead tip portion 31a by the projection J232 and the projection J231. As shown in FIG. 12, the length of the projection J232 is such that when the outermost peripheral trunk portion J21 is brought close to the general wire holding portion J221 so that the tip of the lead tip portion 31a can be held, the connecting wire portion 31y already twisted. The length is set so that the tip of the lead can be held deeper than the tips of the other lead tips 31a.

As shown in FIG. 12, the second twisting annular jig J20 is close to the stator 10 until the lead wire end portion 31a is held by the general wire holding portion J221 and the connection wire holding portion J222 as shown in FIG. Then, the general wire holding portion J221 holds the lead tip portion 31a, and the connection wire holding portion J222 holds the connection wire portion 31y. In this state, the trunks are respectively rotated, and the outermost peripheral trunk J21 is rotated as shown in FIG. 13 to twist the lead tip 31a. In the "pre-twisting step", the connecting line portion 31y is twisted on the power line portion 31x, that is, by one pitch, as shown in FIG. 11, so that when the lead tip portion 31a is twisted by three pitches, The connection line portion 31y is twisted by 2 pitches.

Since the power line portion 31x and the connection line portion 31y are provided in the tenth layer tip portion 31a10, the first layer tip portion 31a1 to the ninth layer tip portion 31a9 are the lead tip portions 31a protruding from the respective slots 22. Are twisted in the same direction. Then, after this, Tig welding is performed in S9, and the W-phase connecting terminal 41W, the U-phase connecting terminal 41U, and the V-phase connecting terminal 41V are also welded to the power line portion 31x. The W-phase connection terminal 41W, the U-phase connection terminal 41U, and the V-phase connection terminal 41V held on the terminal block 42 are portions electrically connected to a vehicle-mounted battery or the like. After that, insulation coating is performed in S10.

Next, the shape of the protrusion J232 used in the segment coil forming method of the present embodiment will be described. In the present embodiment, in order to reduce the physical size of the segment coil after molding, the segment coil is pressed using the second twisting annular jig J20 including the above-mentioned protrusion J232. The protrusion J232 of the second twisting annular jig J20 is characterized by the shape of the surface that presses the connecting wire portion 31y of the segment coil 30.

FIG. 14 is a sectional view showing a segment coil and a jig in the segment coil forming method of the present embodiment. As shown in FIG. 14, the protrusion J232 faces the connection line portion 31y of the segment coil 30 and has a flat shape on the surface 301 pressed by the connection line portion 31y of the segment coil 30. The surface 301 of the protrusion J232 has a shape corresponding to the connecting wire portion 31y of the segment coil 30. That is, the surface 301 of the protrusion J232 is a surface parallel to the connection wire portion 31y of the segment coil 30.

In the process of reducing the size of the segment coil, the protrusion J232 is pressed against the connecting wire portion 31y of the segment coil 30. Since the surface 301 of the protrusion J232 facing the coil has a shape corresponding to the connecting wire portion 31y of the segment coil 30, when the protrusion J232 contacts the connecting wire portion 31y of the segment coil 30, the surface 301 is evenly segmented. It comes into contact with the connection line portion 31y of 30. Then, when the protrusion J232 presses the connecting wire portion 31y of the segment coil 30, the pressing force is dispersed over the entire surface 301.

By pressing the connecting wire portion 31y of the segment coil 30 over the entire surface 301, the physique of the segment coil 30 is reduced without making an impression on the connecting wire portion 31y of the segment coil 30.

For comparison, a segment coil forming method using a conventional jig will be described. FIG. 15 is a sectional view showing a segment coil and a jig in a conventional segment coil forming method. As shown in FIG. 15, in the projection 400 of the conventional jig, the surface 401 that comes into contact with the connecting wire portion 31y of the segment coil 30 is not flat, but comes into contact with the connecting wire portion 31y of the segment coil 30 at approximately one point. ..

When the connecting wire portion 31y of the segment coil 30 is pressed by such a conventional jig, an indentation is generated. FIG. 16 is a cross-sectional view showing the shape change and the indentation generation by the conventional segment coil forming method. As shown in FIG. 16, when the stress is concentrated on the surface 401, a large force is concentrated on the portion of the connecting wire portion 31y of the segment coil 30 that comes into contact with the surface 401, and an indentation occurs.

On the other hand, in the segment coil forming method of the present embodiment, the area of the surface 301 where the projection J232 presses the connection line portion 31y of the segment coil 30 is large, and the stress is dispersed, so indentations are less likely to occur.

As described above, according to the segment coil forming method of the present embodiment, the twist-formed segment coil is pressed by the jig whose surface facing the segment coil is a flat shape to reduce the physique of the segment coil. It is possible to disperse the stress and prevent the indentation from being generated in the segment coil.

In addition, it is preferable that at least half of the entire surface of the protrusion J232 facing the coil has a flat shape.

Further, it is preferable that at least the central portion of the surface of the protrusion J232 facing the coil is flat. By making at least the central portion of the surface facing the coil flat, it is possible to reduce the physical size of the segment coil evenly between the stator connection side and the tip side.

The present invention is not limited to the above-mentioned embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, it does not prevent changing the number of the in-slot conductor portions 31b housed in the slots 22 of the stator core 20 and changing the shape of the segment 31 in accordance with the design requirements. Further, the shapes of the jigs such as the first twisted annular jig J10, the second twisted annular jig J20, the cuffer J30, etc., do not prevent design changes within the scope of the invention.

10 Stator 20 Stator Core 21 Teeth 22 Slot 25 Insulator 30 Segment Coil 31 Segment 31a Lead Tip 31b In-Slot Conductive Wire 31c Anti-Lead 31e Crank 31f Weld 31i Stripping 31x Power Line 31y Connecting Wire 32 Circular Assy 33 Wedge paper 40 External connection terminal 41 Connection terminal 42 Terminal block D Flat conductor J10 1st twist ring jig J20 2nd twist ring jig J30 Cuffer

Claims (1)

A segment coil molding method for reducing the physique of the segment coil by pressing the twisted segment coil with a jig having a flat surface facing the segment coil.

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