JP6673180B2 - Stator manufacturing equipment - Google Patents

Description

  The present invention relates to a stator manufacturing device for manufacturing a stator.

  After peeling off the coating of the lead portion projecting from the end face of the stator core of the segment coil made of a rectangular conductor inserted into the slot portion of the annular stator core by using a cutting tool, between the lead portion groups. There is known a stator manufacturing apparatus in which a blade is inserted to form a gap between the lead portions (for example, see Patent Document 1).

JP 2014-107877 A

  In the above-described stator manufacturing apparatus, since the lead portion is peeled using a blade, the manufacturing cost increases due to the blade and the number of steps of the peeling. On the other hand, when the step of peeling the lead portion with the cutting tool is omitted, the lead portions come into close contact with each other and no gap is generated between the lead portions. For this reason, when the blade is inserted between the leads, the leads may be damaged.

  The present invention has been made to solve such a problem, and has as its main object to provide a stator manufacturing apparatus capable of forming a gap between leads without damaging the leads.

One embodiment of the present invention for achieving the above object,
A stator manufacturing device for forming a gap between a group of lead portions projecting from an end face of the stator core of a segment coil formed of a rectangular conductor inserted into a slot portion of an annular stator core,
A first inclined surface slidably in contact with a first side surface of the lead portion, wherein the first inclined surface moves in an axial direction of the stator core and in a direction approaching the lead portion; A first insertion portion inserted between the lead portions adjacent to both sides of the lead portion while sliding the portion in the circumferential direction of the stator core along the first inclined surface;
The first than the inclined surface is formed at a position apart in the axial direction of the stator core from the lead portion, the second inclined surface sliding contact with the second side of agreement perpendicular adjacent to the first side surface of the lead portion And fixing the slidable lead portion along the second inclined surface as the second inclined surface moves in the axial direction of the stator core and in a direction approaching the lead portion. in Rukoto slide in the radial direction of the child core, and a second insertion portion to form a gap between the lead portion adjacent to the slide the lead portion and said lead portion,
Comprising an expansion blade having
It is a stator manufacturing apparatus characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the stator manufacturing apparatus which can form a clearance gap between lead parts without damaging a lead part can be provided.

It is a perspective view of a stator concerning one embodiment of the present invention. It is a top view of a segment coil. It is a figure which shows the outline of the assembly process of a stator. It is a flowchart which shows the flow of a stator manufacturing method. It is an expanded sectional view of a slot part in the state where an in-slot conductor part was inserted into a slot of a stator core. It is a figure for explaining lead part expansion. It is a perspective view showing the expansion blade of the stator manufacturing device concerning one embodiment of the present invention. It is a block diagram showing a schematic structure of a stator manufacturing device concerning one embodiment of the present invention. It is a figure showing the state of each lead part, the 1st insertion part, and the 2nd insertion part at the time of forming a crevice between lead parts. It is a perspective view showing the expansion blade of the stator manufacturing device concerning one embodiment of the present invention. It is a perspective view showing an example of an expansion blade.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a stator according to one embodiment of the present invention. The stator 10 is used, for example, for a motor mounted on a hybrid vehicle or the like. The stator 10 has a stator core 20 and a segment coil 21. The stator core 20 is formed by laminating substantially cylindrical electromagnetic steel plates. The stator core 20 is provided with slots 12 between the teeth 11 protruding inward and the adjacent teeth 11. An insulator 25 having an insulating property is inserted into the slot 12. The insulator 25 secures insulation between the segment coil 21 and the stator core 20.

  FIG. 2 is a plan view of the segment coil. The segment coil 21 is formed by edgewise bending a rectangular conductor D into a substantially U shape. The segment coil 21 includes an in-slot conductor 211 inserted into the slot 12 of the stator core 20, a lead 212 protruding from the end face of the stator core 20 on the lead side of the stator 10, an anti-lead 213, have.

  FIG. 3 is a view schematically showing a process of assembling the stator. FIG. 3A is a perspective view of the stator core 20. FIG. 3B is a perspective view in which an insulator 25 is provided on the stator core 20. FIG. 3C is a perspective view of the segment coil 21. FIG. 3D is a cross-sectional view illustrating a state where the segment coils 21 are inserted into the stator core 20. FIG. 3E is a cross-sectional view showing a state where the segment coils 21 are welded. The shape of the perspective view shown in FIG. 3 is simplified for explanation. First, with the insulator 25 inserted into the slot 12 formed in the stator core 20 shown in FIG. 3A as shown in FIG. 3B, the segment coil 21 shown in FIG. insert.

  As a result, a state as shown in FIG. That is, the segment coil 21 is in a state where the lead portion 212 projects from the end face of the stator core 20. Then, as shown in FIG. 3E, the stator 10 is formed by twisting the lead portion 212 and welding the tip end to form a welded portion 214. Although FIG. 3 conceptually illustrates the process of forming the stator 10, an actual assembling process requires an alignment process of arranging the segment coils 21 in an annular shape.

  FIG. 4 is a flowchart showing a flow of the stator manufacturing method. In S1, "straightening and cutting out a rectangular conductor" is performed. Since the rectangular conductor D is wound around a bobbin (not shown), the conductor is unwound to remove a habit and cut out to a required length. In S2, "segment formation" is performed. The rectangular conductor D is edgewise bent to obtain a substantially U-shaped segment coil 21. In S3, "segment alignment" is performed. The segment coils 21 are formed such that the in-slot conductors 211 are accommodated in the slots 12 of the stator core 20 by, for example, a predetermined number.

  In S4, "Insulator insertion" is performed. Insulators 25 are inserted into the slots 12 of the stator core 20 to insulate the stator core 20 and the segment coils 21 from each other. At S5, "segment coil insertion" is performed. Strictly speaking, this is a step of bringing the segment coil 21 close to the stator core 20 and inserting the lead portion 212 into the slot 12 provided with the insulator 25.

  In S6, "wedge insertion" is performed. FIG. 5 is an enlarged cross-sectional view of the slot portion in a state where the in-slot conductor portion is inserted into the slot of the stator core. The wedge paper 13 is inserted into the innermost peripheral side of the stator core 20 with the in-slot conductors 211 of the segment coil 21 inserted into the slots 12. The wedge paper 13 is held by being stretched by a projection 11 a provided at the tip of the tooth 11 so as to project into the slot 12. In S7, "lead portion expansion" is performed. The “lead portion expansion” is a process of forming a gap between the lead portions 212 as shown in FIG. 6, for example, by using an expansion blade 30 according to the present embodiment described later.

  In S8, “twist formation” is performed. The lead portion 212 of the segment coil 21 inserted into the stator core 20 is twisted in the radial direction of the stator core 20 to be deformed into a shape such that adjacent coils are connected to each other. In S9, "Tig welding" is performed. As shown in FIG. 3E, a welded portion 214 is formed by welding adjacent lead portions 212 together.

  By the way, in the above-mentioned "lead portion expansion", conventionally, after a coating film of a lead portion is peeled off using a cutting tool, a blade or the like is inserted between the lead portion groups to form a gap between the lead portions. doing. In this case, since the lead portion is peeled using the blade, the manufacturing cost increases due to the blade and the number of steps of the peeling. On the other hand, when the step of peeling the lead portion with the cutting tool is omitted, the lead portions come into close contact with each other and no gap is generated between the lead portions. For this reason, when the blade is inserted between the leads, the leads may be damaged.

On the other hand, as shown in FIG. 7, the stator manufacturing apparatus 1 according to the present embodiment has a first inclined surface 311 that slides on the first side surface of the lead portion 212, and the first inclined surface 311 is fixed to the stator. As the core portion 20 moves in the axial direction and in a direction approaching the lead portion 212, the lead portion 212 is slid in the circumferential direction of the stator core 20 along the first inclined surface 311, and A first insertion portion 31 inserted between the lead portions 212 adjacent to both sides of the lead portion 212 and a lead portion 212 formed at a position further away from the lead portion 212 in the axial direction of the stator core 20 than the first inclined surface 311. the first has a second inclined surface 321 in sliding contact with the second side of agreement perpendicular adjacent to the side surface, the lead portion 212 slides in the axial direction and the lead portion 212 of the second inclined surface 321 is the stator core 20 of the To move in the approaching direction Therefore, in Rukoto slide in the radial direction of the stator core 20 along the second inclined surface 321, to form a gap between the lead portion 212 adjacent to the lead portion 212 and the lead portion 212 slides And an expansion blade 30 having a second insertion portion 32.

  Accordingly, first, the lead portion 212 is slid in the circumferential direction of the stator core 20 along the first inclined surface 311 by the first insertion portion 31 of the expansion blade 30. Then, the second side surface of the lead portion 212 slid and separated from the adjacent lead portion 212 is slid in the radial direction of the stator core 20 along the second inclined surface 321 by the second insertion portion 32, and the lead A gap is formed between the portion 212 and the adjacent lead portion 212. Therefore, a gap can be formed between the lead portions 212 without damaging the lead portions 212.

  FIG. 8 is a block diagram illustrating a schematic configuration of the stator manufacturing apparatus according to the present embodiment. The stator manufacturing apparatus 1 according to the present embodiment includes, for example, a fixing jig 2 for fixing a group of leads 212, an expansion blade 30, and a movement for moving the expansion blade 30 in the radial direction and the axial direction of the stator core 20. The system includes a mechanism 3, a control unit 4 for controlling movement of the moving mechanism 3, and an operation unit 5 for inputting operation information by a user.

  The moving mechanism 3 drives an actuator such as a motor in response to a control signal from the control unit 4 to move the expansion blade 30 in the radial direction and the axial direction of the stator core 20. The operation unit 5 includes, for example, a touch panel on which a user can input operation information. The control unit 4 moves the expansion blade 30 in the radial direction and the axial direction of the stator core 20 by controlling the movement of the moving mechanism 3 based on a program and operation information set via the operation unit 5. .

  The control unit 4 includes, for example, a CPU (Central Processing Unit) 41 that performs control processing, arithmetic processing, and the like, a ROM (Read Only Memory) storing a control program executed by the CPU 41, an arithmetic program, and the like, and a RAM (Random). Each of the hardware components is configured around a microcomputer including a memory 42 including an access memory (I / F) and an interface unit (I / F) 43 for inputting and outputting signals to and from the outside. The CPU 41, the memory 42, and the interface unit 43 are mutually connected via a data bus or the like.

  FIGS. 9A to 9F are views showing the states of the respective lead portions, the first insertion portion, and the second insertion portion when a gap is formed between the lead portions, and are shown along the end surfaces of the lead portions. It is sectional drawing at the time of cutting. As shown in FIG. 7, before the lead portions are expanded, the lead portions A, B, and C are not peeled off, so that the lead portions A, B, and C are in close contact with each other and no gap is formed between the lead portions A, B, and C. (FIG. 9A).

  The control unit 4 controls the moving mechanism 3 to move the first inclined surface 311 of the first insertion portion 31 of the expansion blade 30 in the axial direction of the stator core 20 and in the approach direction to the lead portion B. Thereby, the first side surface B1 of the lead portion B is pressed by the first inclined surface 311 of the first insertion portion 31, and the lead portion B slides in the circumferential direction of the stator core 20 along the first inclined surface 311. I do. The lead portion B that has slid off comes off from the adjacent lead portion C in the circumferential direction of the stator core 20. Then, as shown in FIG. 10, the first insertion portion 31 is inserted between the lead portions A and C adjacent to both sides of the lead portion B (FIG. 9B).

  Further, the control unit 4 controls the moving mechanism 3 to move the expansion blade 30 in the axial direction of the stator core 20 and in the approaching direction to the lead portion B. The second inclined surface 321 of the second insertion portion 32 further moves in the axial direction of the stator core 20 and in a direction approaching the lead portion B. As a result, the second side surface B2 of the lead portion B that slides in the circumferential direction and deviates from the adjacent lead portion C is pressed by the second inclined surface 321 so that the lead portion B and the adjacent lead A become the second inclined portion. It gradually slides in the radial direction of the stator core 20 along the surface 321 (FIGS. 9C, 9D, and 9E).

  Finally, the controller 4 controls the moving mechanism 3 to pull out the expansion blade 30 in the axial direction of the stator core 20 and in the direction away from the lead portion B. Thereby, the lead portion B returns to the original position, and a gap X is formed between the lead portion B and the adjacent lead portion C (FIG. 9F).

The control unit 4 controls the moving mechanism 3 to move the expansion blade 30 in the radial direction of the stator core 20, and repeats the movement of the expansion blade 30 and the formation of the gap. By repeating the above, for example, as shown in FIG. 6, the lead portions 212 adjacent in the radial direction of the stator core 20 can be formed into a pair, and the gap X can be formed between each pair.

As described above, the lead B is slid in the circumferential direction of the stator core 20 by the first inclined surface 311 of the first insertion portion 31 so that the second side surface B2 of the lead portion B is disengaged from the adjacent lead C. . Then, the second inclined surface 321 of the second insertion portion 32 presses the second side surface B2 of the lead portion B separated from the lead portion C to form a gap between the lead portions B and C. This eliminates the step of peeling the leads A, B, and C using the blade, and does not damage the leads B and C even when the leads B and C are in close contact with each other.

  FIG. 11 is a perspective view illustrating an example of the expansion blade. In the expansion blade 30 according to the present embodiment, for example, as shown in FIG. 11, the height a of the first inclined surface 311 that determines the amount of sliding of the lead portion 212 in the circumferential direction of the stator core 20 is 1.7 mm. , Is set to approximately の of the vertical dimension of the lead portion 212 (the circumferential thickness of the stator core 20). The inclination angle b of the first inclined surface 311 is set to less than 45 °, and is set here to 30 °. The height c of the second inclined surface 321 that determines the amount of sliding of the lead portion 212 in the radial direction of the stator core 20 is set to 1.0 mm. The inclination angle d of the second inclined surface 321 is set to 11 °. This inclination angle d is an angle equivalent to a conventional blade. Note that the configuration of the expansion blade 30 is an example, and is not limited to this.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist.

  Reference Signs List 1 stator manufacturing device, 2 fixing jig, 3 moving mechanism, 4 control unit, 5 operating unit, 10 stator, 11 teeth, 11a convex portion, 12 slots, 13 wedge paper, 20 stator core, 21 segment coil, Reference Signs List 25 insulator, 30 expansion blade, 31 first insertion portion, 32 second insertion portion, 211 conducting wire portion in slot, 212 lead portion, 213 anti-lead portion, 311 first inclined surface, 321 second inclined surface

Claims (1)

A stator manufacturing device for forming a gap between a group of lead portions projecting from an end face of the stator core of a segment coil formed of a rectangular conductor inserted into a slot portion of an annular stator core,
A first inclined surface slidably in contact with a first side surface of the lead portion, wherein the first inclined surface moves in an axial direction of the stator core and in a direction approaching the lead portion; A first insertion portion inserted between the lead portions adjacent to both sides of the lead portion while sliding the portion in the circumferential direction of the stator core along the first inclined surface;
The first than the inclined surface is formed at a position apart in the axial direction of the stator core from the lead portion, the second inclined surface sliding contact with the second side of agreement perpendicular adjacent to the first side surface of the lead portion And fixing the slidable lead portion along the second inclined surface as the second inclined surface moves in the axial direction of the stator core and in a direction approaching the lead portion. in Rukoto slide in the radial direction of the child core, and a second insertion portion to form a gap between the lead portion adjacent to the slide the lead portion and said lead portion,
Comprising an expansion blade having
An apparatus for manufacturing a stator, comprising:

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