JP2021005937A - Stator of electric rotary machine, and manufacturing device and manufacturing method of the same - Google Patents

Abstract

To provide a stator of a rotary electric machine that improves joint quality with a conductive wire at a hook section without increasing manufacturing cost.SOLUTION: A stator of a rotary electric machine includes: a stator core; an insulator mounted on the stator core; a coil formed by winding a conductive wire having an insulation film at a conduction section through the insulator; and a terminal section having a hook section attached to the insulator and holding the conductive wire. The hook section is provided with: a flat back section which is part of the terminal section; a bent section that protrudes from the terminal section and bent to wrap and hold the conductive wire; and a tip section extending from an end of the bent section along the back section and pressed against the back section. Height from the back section of the hook section to an upper surface of the tip section is smaller than that from the back section to an upper surface of the bent section. Difference in the height is smaller than a diameter of the conductive section.SELECTED DRAWING: Figure 8

Description

The present application relates to a stator of a rotary electric machine, an apparatus for manufacturing a stator of a rotary electric machine, and a method of manufacturing a stator of a rotary electric machine.

The end portion of the coil in which the conductive wire is wound around the stator core of a rotary electric machine or the like is joined to the hook portion formed in the terminal portion connected to the circuit board outside the stator by fusing.
In this fusing process, the hook portion is processed by pressurizing the hook portion and applying an electric current.

Japanese Unexamined Patent Publication No. 2005-019046 Japanese Unexamined Patent Publication No. 2018-064427

In the conventional fusing process of the hook portion, a configuration using three electrodes, a main electrode, an auxiliary electrode, and a receiving side electrode facing the main electrode and the auxiliary electrode, has been proposed. This configuration has a problem that the number of electrodes is large and the price of manufacturing equipment rises (Patent Document 1).
In addition, a configuration has also been proposed in which a folded portion is provided on the terminal to form an annular portion to improve the joint quality. However, due to the complicated shape, there is a problem that the processing cost rises (Patent Document 2).

The present application has been made to solve the above-mentioned problems, without forming a special folded portion at the terminal, without requiring a large number of electrodes, and without increasing the manufacturing cost. The purpose is to improve the joint quality.

The stator of the rotary electric machine of the present application is attached to a stator core, an insulator mounted on the stator core, a coil formed by winding a conductive wire having an insulating coating on a conductive portion, and an insulator. It is a stator of a rotary electric machine provided with a terminal portion having a hook portion for gripping a conductive wire, and the hook portion is bent so as to protrude from the terminal portion and a flat back portion which is a part of the terminal portion. It is provided with a bent portion that wraps and grips the conductive wire, and a tip portion that extends from the end of the bent portion along the back portion and is pressed against the back portion. The height up to is lower than the height from the back surface portion to the upper surface of the bent portion, and the difference in height is smaller than the diameter of the conductive portion.

The stator of the rotary electric machine of the present application can improve the joint quality with the conductive wire at the hook portion without increasing the manufacturing cost.

It is a perspective view of the stator which concerns on Embodiment 1. FIG. It is a partially enlarged view which shows the structure of the stator core which concerns on Embodiment 1. FIG. It is sectional drawing of the conductive wire which concerns on Embodiment 1. FIG. It is a flow chart which shows the processing process which concerns on Embodiment 1. FIG. It is a figure explaining the processing method which concerns on Embodiment 1. FIG. It is a figure explaining the processing method which concerns on Embodiment 1. FIG. It is a figure explaining the processing method which concerns on Embodiment 1. FIG. It is a figure explaining the processing method which concerns on Embodiment 1. FIG.

In the description of the embodiment and each figure, the parts with the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
<Structure of stator>
The structure of the stator 100 will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of a stator 100 of a rotary electric machine. FIG. 2 is a partially enlarged view showing one stator core 90 portion of the stator 100, and shows the shape, arrangement, and the like of the terminal portion 60, the fixing pin 21, and the like according to the present application.

As shown in FIGS. 1 and 2, in the stator 100, the stator core 90 in which a plurality of core pieces 91 are laminated is arranged in an annular shape. The core piece 91 is formed of a thin plate-shaped magnetic material, and the stator cores 90 are connected to each other by a flexible joint portion 70.

In FIG. 1, a stator 100 in which nine stator cores 90 are arranged in an annular shape is shown as an example, but the number thereof depends on the size of the stator core 90 and the target stator 100 and the like. Can be changed and used.

The core piece 91 is generally T-shaped, and a portion corresponding to a T-shaped horizontal bar is referred to as a back yoke portion 95, and a portion corresponding to a vertical bar is referred to as a teeth portion 96.
FIG. 2 shows a state in which the upper insulator 20a and the lower insulator 20b are being attached to the stator core 90. In this state, the side surface of the stator core 90 is seen from between the upper and lower insulators 20a and 20b. However, in the state after mounting, the upper and lower insulators 20a and 20b are in contact with each other, and the stator core 90 cannot be seen in the intermediate portion.

A conductive wire 31 is wound around the teeth portion 96 of the core piece 91 via the upper and lower insulators 20a and 20b to form a coil 30. The portion surrounded by the broken line in FIG. 1 shows the coil 30 around which the conductive wire 31 is wound. An insulating film is attached between the adjacent stator cores 90 (not shown) to ensure insulation between the coils 30. This insulating film is made of an organic polymer material such as polyethylene terephthalate (PET).

A terminal hole 22 is formed in the upper insulator 20a, and the terminal portion 60 is inserted and fixed. The terminal portion 60 has a hook portion 61 for attaching the terminal portion of the conductive wire 31 constituting the coil 30. The terminal portion 60 provided with the hook portion 61 is made of a metal material such as aluminum or copper, and is installed outside the stator 100 via a circuit board and a lead wire for supplying electric power to the coil 30. Is connected.

A fixing pin 21 is also formed on the upper insulator 20a. A conductive wire 31 is wound around the fixing pin 21 and temporarily attached to the fixing pin 21 before being attached to the hook portion 61 of the terminal portion 60.

In FIG. 2, a terminal hole 22 is formed in the upper insulator 20a and the terminal portion 60 is attached. However, it is not necessary to attach the terminal portion 60 to all the upper insulators 20a, and some stator cores 90 are attached. The conductive wire 31 may be continuously wound around the coil 30 to form the coil 30, and the conductive wire 31 at the end thereof may be connected to the terminal portion 60. The terminal portion 60 is one of several upper insulators 20a. It can also be used by attaching to.

Similarly, it is not necessary to form the fixing pin 21 on all the upper insulators 20a, and it is sufficient to arrange the fixing pin 21 on the upper insulator 20a in which the terminal portion 60 is arranged. Further, a plurality of conductive wires 31 may be fixed to one fixing pin 21 and used. Further, two or more fixing pins 21 are formed on the upper insulator 20a on which one terminal portion 60 is formed, and two of them are formed. The conductive wire 31 can also be fixed to the above fixing pin 21 for use.

FIG. 3 shows a cross-sectional view of the conductive wire 31.
As shown in the cross-sectional view, the conductive wire 31 forming the coil 30 has an insulating coating 33 around it and a conductive portion 32 made of a highly conductive substance such as copper and aluminum inside. In the first embodiment, the diameter d1 of the conductive wire 31 and the diameter d2 of the conductive portion 32 are used for description.

After winding the conductive wire 31 to form the coil 30, of the two hook portions 61 formed on the terminal portion 60, the end portion of the conductive wire 31 is hung on one of the hook portions 61 and arranged on the upper insulator 20a. Wrap it around the fixing pin 21 and temporarily attach it.

Of the conductive wires 31 forming the coil 30, the end portion opposite to the end portion of the conductive wire 31 temporarily attached to the fixing pin 21 arranged on the upper insulator 20a is the coil 30 constituting the stator 100. The hook portion 61 of the two hook portions 61 of the terminal portion 60 attached to the upper insulator 20a of the stator core 90 having the same phase is hooked on the vacant hook portion 61.

As described above, the in-phase coil 30 is electrically connected in series, and one end portion connected to the in-phase coil 30 is connected to the circuit board that supplies power from the terminal portion 60 to the coil 30 via the lead wire. Be connected. The other end of the conductive wire 31 wound around the coil 30 is connected to the end of another phase that is not connected to the circuit board.
In the first embodiment, the conductive wire 31 forming the coil 30 is described as one, but a plurality of electrically parallel conductive wires 31 can also be used.

<Assembly process of stator>
The assembly process of the stator 100 will be described below with reference to FIG.
(1) Step S001: Insertion of insulator A plurality of core pieces 91 are laminated to form a stator core 90. When the stator cores 90 are arranged to form the stator 100, although not shown in FIG. 2, a pre-cut insulating film is brought into close contact with the portion to be the inner peripheral surface of the stator 100 to form the stator. The upper and lower insulators 20a and 20b are inserted from above and below in the axial direction. As a result, the stator core 90, the insulating film, and the upper and lower insulators 20a and 20b are fixed and arranged with each other.

(2) Step S002: Inserting the terminal portion The terminal portion 60 is inserted into the terminal hole 22 formed in the upper insulator 20a. As shown in FIG. 2, the vertical rod-shaped portion of the terminal portion 60 is inserted into and fixed to the terminal hole 22 formed in the upper insulator 20a. At this time, by forming the terminal hole 22 of the upper insulator 20a slightly smaller than the rod-shaped portion of the terminal portion 60, the terminal portion 60 can be press-fitted and the height of the terminal portion 60 can be adjusted.

(3) Step S003: Coil formation The conductive wire 31 is wound around the stator core 90 into which the upper and lower insulators 20a and 20b are inserted to form the coil 30. One end of the conductive wire 31 constituting the coil 30 is hooked on the hook portion 61 shown in FIG. 2 and wound around a fixing pin 21 formed on the upper insulator 20a for temporary attachment.

The conductive wire 31 hung on the hook portion 61 of the terminal portion 60 does not have to be the conductive wire 31 wound around the stator core 90 to which the terminal portion 60 is attached, and the stator to which the terminal portion 60 is fixed does not have to be. The end portion of the conductive wire 31 constituting the coil 30 wound around the stator core 90 different from the core 90 may be used by hanging on the hook portion 61.

(4) Step S004: Assembling the stator cores A plurality of stator cores 90 on which the coil 30 is formed through the coil forming step are arranged in an annular shape. After that, the stator 100 can be formed by connecting the joints 70 to the outer peripheral portions where the stator cores 90 are in contact with each other in the axial direction. Of the end portions of the coil 30 formed on each stator core 90, the end portions of the conductive wire 31 not hooked on the hook portion 61 of the terminal portion 60 are close to each other by arranging the stator core 90 in an annular shape. It can be temporarily attached by hooking it on the hook portion 61 of the terminal portion 60 of the other stator core 90 and using the fixing pin 21.

(5) Step S005: Fusing process The end portion of the conductive wire 31 that is hung on the hook portion 61 of the terminal portion 60 attached to the stator core 90 in the previous step and temporarily attached is fixed by fusing processing. By performing the fusing process, the coil 30 of the stator core 90 can be brought into a state of being electrically conductive via the terminal portion 60.

The fusing process can be roughly divided into a step of pressurizing and deforming the hook portion 61 of the terminal portion 60 and a step of melting the insulating coating 33 at the end portion of the conductive wire 31 by generating heat of the terminal portion 60 due to energization. This will be described with reference to FIGS. 3 and 5 to 8.

5 to 8 show a state in which the end portion of the conductive wire 31 is hung on the hook portion 61 of the terminal portion 60 from the side surface direction of the hook portion 61, and the hook portion 61 is a main electrode located on the upper side. It shows a state of being arranged between the 50 and the receiving electrode 40 located on the lower side.

FIG. 5 shows a state in which the back surface of the terminal portion 60 is arranged in close contact with the receiving side electrode 40, and the main electrode 50 is not in contact with the hook portion 61. At this stage, no pressure is applied to the hook portion 61, and the hook portion 61 is not electrically energized. Therefore, the conductive wire 31 has an insulating coating 33 and has not been deformed yet, so that the diameter is d1.

As shown in FIG. 2, the hook portion 61 is formed by bending a part of the flat terminal portion 60. More specifically, as shown in FIG. 5, the hook portion 61 has a back surface portion 63 which is a part of the flat terminal portion 60, a bent portion 64 which is bent and protrudes from the flat portion of the terminal portion 60, and a bent portion 64 which wraps the conductive wire 31. It is formed by a tip portion 62 extending further from the end of the bent portion 64.

The receiving side electrode 40 located on the lower side has a flat electrode surface. The back surface portion 63 of the hook portion 61, which is a part of the flat terminal portion 60, is closely arranged on the electrode surface.

The main electrode 50 located on the upper side has three flat electrode surfaces. The first electrode surface 51 projects downward from these three electrode surfaces and is arranged so as to face the electrode surface of the receiving side electrode 40. Further, the second electrode surface 52 is arranged so as to face the electrode surface of the receiving side electrode 40 and is arranged farthest from the receiving side electrode 40 among the three electrode surfaces, similarly to the first electrode surface 51. ing.
The third electrode surface 53 is an inclined electrode surface that connects the first electrode surface 51 and the second electrode surface 52.

As shown in FIG. 5 and the like, the difference in height between the first electrode surface 51 and the second electrode surface is represented by d3.
In the first embodiment, the height difference d3 between the first electrode surface 51 and the second electrode surface 52 is the conductive wire 31 of the conductive wires 31 gripped by the bent portion 64 of the hook portion 61. The diameter of the conductive portion 32 excluding the insulating coating 33 is smaller than the diameter d2 (d2> d3).

In FIG. 5, the main electrodes 50 are arranged apart from each other without being in contact with the hook portion 61, but by gradually approaching the main electrode 50 to the receiving side electrode 40, first, the tip portion 62 of the hook portion 61 Is in contact with the first electrode surface 51 of the main electrode 50. As the operation of the main electrode 50 further progresses, the tip portion 62 of the hook portion 61 is pressurized by the first electrode surface 51, and as shown in FIG. 6, the bent portion 64 of the hook portion 61 is subjected to the conductive wire 31 by the main electrode 50. Can be bent to wrap around.

Further, as the operation of the main electrode 50 progresses, as shown in FIG. 7, the bent portion 64 and the tip portion 62 of the hook portion 61 are pressed by the main electrode 50 and deformed into a shape substantially following the shape of the main electrode 50. To do. Further, in FIG. 7, the inclined third electrode surface 53 diagonally presses the hook portion 61 in the direction of the conductive wire 31. As a result, the tip portion 62 of the hook portion 61 is a part of the terminal portion 60 and is pressed against the back surface portion 63 of the flat hook portion 61. At the same time, the bent portion 64 of the hook portion 61 covers the entire outer circumference of the conductive wire 31 of the coil 30 with almost no gap, and the conductive wire 31 is gripped by the hook portion 61.
In this state, the conductive wire 31 has an insulating coating 33, and the conductive wire 31 has a diameter d1.

Next, a step of energizing between the main electrode 50 and the receiving side electrode 40 to melt the insulating coating 33 of the conductive wire 31 will be described. When energization is started between the main electrode 50 and the receiving side electrode 40 in the state shown in FIG. 7, a current can flow from the main electrode 50 to the receiving side electrode 40 via the hook portion 61 and the terminal portion 60.

Since the bent portion 64 of the hook portion 61 covers and wraps around the conductive wire 31, the entire outer circumference of the conductive wire 31 can be heated, and the insulating coating 33 on the outer circumference of the conductive wire 31 can be melted. .. At the same time, since the conductive wire 31 is pressurized from the outer circumference by the hook portion 61, the molten insulating coating 33 is extruded in the longitudinal direction of the conductive wire 31. As a result, the bent portion 64 of the hook portion 61 and the conductive portion 32 from which the insulating coating 33 of the conductive wire 31 has been removed come into contact with each other, and stable conductivity can be ensured.

The current value flowing from the main electrode 50 to the receiving side electrode 40 via the hook portion 61 which is a part of the terminal portion 60 can be measured by using a toroidal coil provided in the fusing processing apparatus. It is controlled by converting it to the voltage between the electrodes, and the current value between the electrodes is kept constant.

However, since the terminal portion 60 including the hook portion 61 is manufactured by sheet metal processing, the plate thickness varies widely. Therefore, in order to uniformly bend the hook portion 61, it is preferable to manufacture the plate thickness uniformly, but there is a problem that the manufacturing cost increases.

Further, when energization is applied between the main electrode 50 and the receiving side electrode 40, a large distribution is generated in the current density according to the variation in the plate thickness of the terminal portion 60, and the calorific value varies. Therefore, the terminal portion 60 And the temperature of the conductive wire 31 varies.

When the terminal portion 60 and the conductive wire 31 generate heat due to energization, the yield point indicating the pressure required to deform the hook portion 61 and the conductive wire 31 which are a part of the terminal portion 60 decreases. Therefore, the temperature variation due to energization is the variation in the pressing force required to give a constant deformation to the hook portion 61 and the conductive wire 31. Therefore, in order to keep the deformation constant, it is conceivable to adjust the pressure between the main electrode 50 and the receiving side electrode 40 every short energization time to suppress the variation in deformation. Therefore, a servomotor is added to the pressurizing mechanism. The configuration to be used can be considered. However, there is a problem that the equipment configuration becomes complicated and the equipment cost becomes high.

Further, a method of stopping the current when the deformation of the hook portion 61 and the conductive wire 31 reaches a target size, suppressing heat generation, and reducing the variation in deformation can be considered. However, there is a large variation in the easiness of deformation of the hook portion 61 and the conductive wire 31 due to the variation in the plate thickness of the terminal portion 60, and other portions before the insulating coating 33 at the end portion of the conductive wire 31 is completely melted. May reach sufficient deformation and stop energization, and there may be problems such as the possibility that the insulating coating 33 remains on the surface of the conductive wire 31.

In the first embodiment, the height difference d3 between the first electrode surface 51 and the second electrode surface 52 of the main electrode 50 shown in FIG. 5 and the like is the conductivity with the insulating coating 33 removed as described above. The diameter of the conductive portion 32 of the wire 31 is smaller than the diameter d2 (d2> d3).
FIG. 8 shows a hook portion 61 after performing fusing processing using the main electrode 50. FIG. 8 is an observation of the hook portion 61 from the side surface direction as in FIG. 5 and the like.

In this state, the insulating coating 33 of the conductive wire 31 is melted, and only the conductive portion 32 is formed. Further, since the difference d3 in the height of the electrode surface of the main electrode 50 is formed to be smaller than the diameter d2 of the conductive portion 32 of the conductive wire 31, when the fusing process is performed by the main electrode 50, the temperature rises and the temperature is increased. The conductive portion 32 is deformed by the pressure as compared with that before processing, and the size in the upper surface direction from the back surface portion 63 of the hook portion 61 is reduced.

Since the difference d3 in the height of the electrode surfaces is smaller than the diameter d2 of the conductive portion 32 (d2> d3), the conductive portion 32 is deformed according to the shape of the main electrode 50 and is on the upper surface side of the hook portion 61. It can be said that the entire surface of the main electrode 50 could be pressed evenly with the entire surface of the main electrode 50.

That is, the first electrode surface 51 of the main electrode 50 is bent so as to enclose the tip portion 62 of the hook portion 61, and the second electrode surface 52 is bent so as to enclose the conductive portion 32 obtained by melting and removing the insulating coating 33 of the conductive wire 31. The third electrode surface 53 in the middle presses the intermediate portion between the tip portion 62 and the bent portion 64 from the upper surface side toward the flat back surface portion 63 which is a part of the terminal portion 60. ing.

By pressing with the main electrode 50, the tip portion 62 of the hook portion 61 and the upper surface of the bent portion 64 are formed with a height difference d3 similar to the electrode surface of the main electrode 50, and are wrapped in the bent portion 64 of the hook portion 61. The conductive portion 32 is pressed and deformed.
As a result, the entire surface of the hook portion 61 on the upper surface side can be evenly pressed by the main electrode 50. Since the pressure applied to the conductive portion 32 is also evenly dispersed, it is possible to prevent the conductive portion 32 from being locally deformed.

Further, since the entire surface of the main electrode 50 is in contact with the entire surface of the hook portion 61 on the upper surface side, the current path can be dispersed. Therefore, local heat generation can be prevented, excessive deformation of the hook portion 61 and the conductive portion 32 of the terminal portion 60 can be suppressed, and the strength of the contact portion between the conductive portion 32 and the hook portion 61 can be maintained.

After the energization is completed, the pressurization is completed by moving the main electrode 50 and the receiving side electrode 40 to their original positions.
As the material of the main electrode 50 and the receiving side electrode 40, metal materials such as tungsten and molybdenum can be used. By using these metal materials, the terminal portion 60 is not welded to the electrode surface, and the bent portion of the hook portion 61 of the terminal portion 60 is opened at the stage of opening the gap between the main electrode 50 and the receiving side electrode 40. Does not give power.

As described above, the height difference d3 between the first electrode surface 51 and the second electrode surface 52 of the main electrode 50 is smaller than the diameter d2 of the conductive portion 32 excluding the insulating coating 33 of the conductive wire 31. By (d2> d3), the pressure applied to the conductive portion 32 can be evenly dispersed after the insulating coating 33 is melted by the heat generated during energization and extruded in the longitudinal direction of the conductive wire 31, and the terminal portion 60 can be uniformly distributed. And the excessive temperature rise of the conductive portion 32 can be suppressed.

Therefore, according to the shape of the main electrode 50 of the first embodiment, the local crushing of the conductive portion 32 can be suppressed by dispersing the pressing force and suppressing the temperature rise, and the insulating coating 33 of the conductive wire 31 is formed. It has a sufficient calorific value for melting, can stabilize the bonding strength between the terminal portion 60 and the conductive portion 32, and can improve the bonding quality.

(6) Step S006: Circuit board mounting This is a step of mounting a circuit board for applying a current to the conductive wire 31 of the coil 30.
A certain gap is formed in the circuit board, and an electrical connection can be obtained by sandwiching the terminal portion 60 protruding above the stator in this gap and further using solder.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in the embodiments are not limited to the application of a particular embodiment. , Alone, or in various combinations, are applicable to embodiments.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

20a upper insulator, 20b lower insulator, 21 fixing pin, 22 terminal hole, 30 coil, 31 conductive wire, 32 conductive part, 33 insulating coating, 40 receiving side electrode, 50 main electrode, 51 first electrode surface, 52 second Electrode surface, 53 Third electrode surface, 60 Terminal part, 61 Hook part, 62 Tip part, 63 Back part, 64 Bending part, 70 Joint part, 90 Stator core, 91 Core piece, 95 Back yoke part, 96 Teeth part, 100 stators.

Claims (4)

With the stator core,
The insulator attached to the stator core and
A coil formed by winding a conductive wire having an insulating coating on a conductive portion via the insulator, and
A stator of a rotary electric machine provided with a terminal portion attached to the insulator and having a hook portion for gripping the conductive wire.
The hook portion is
A flat back surface that is a part of the terminal part,
A bent portion that protrudes from the terminal portion and is bent to wrap and grip the conductive wire.
A tip portion extending from the end of the bent portion along the back surface portion and pressed against the back surface portion is provided.
The height of the hook portion from the back surface portion to the upper surface of the tip portion is lower than the height from the back surface portion to the upper surface of the bent portion.
The stator of a rotary electric machine, characterized in that the difference in height is smaller than the diameter of the conductive portion. The upper surface of the tip portion and the bent portion has a flat shape, respectively.
The stator of a rotary electric machine according to claim 1, wherein the stator is connected to each other on an inclined flat surface. With the stator core,
The insulator attached to the stator core and
A coil formed by winding a conductive wire having an insulating coating on a conductive portion via the insulator, and
A stator of a rotary electric machine equipped with a terminal portion attached to the insulator and having a hook portion for gripping the conductive wire is sandwiched between the electrode surface of the receiving side electrode and the electrode surface of the main electrode. It is a stator manufacturing device for rotary electric machines that is manufactured by performing ging processing.
The receiving electrode has a flat electrode surface and has a flat electrode surface.
The main electrode is a third electrode surface that connects a flat first electrode surface and a flat second electrode surface lower than the first electrode surface with the first electrode surface and the second electrode surface. With an electrode surface,
An apparatus for manufacturing a stator of a rotary electric machine, characterized in that the difference in height between the first electrode surface and the second electrode surface is smaller than the diameter of the conductive portion gripped by the hook portion. With the stator core,
The insulator attached to the stator core and
A coil formed by winding a conductive wire having an insulating coating on a conductive portion via the insulator, and
A stator of a rotary electric machine equipped with a terminal portion attached to the insulator and having a hook portion for gripping the conductive wire is gripped by the hook portion at the end portion of the conductive wire, and fusing is performed. It is a manufacturing method of the stator of the rotary electric machine to be manufactured.
The first step of applying the conductive wire to the hook portion and
The hook part
A flat first electrode surface, a second electrode surface lower than the first electrode surface, and a third electrode surface connecting the first electrode surface and the second electrode surface are formed. A main electrode having a height difference between the first electrode surface and the second electrode surface smaller than the diameter of the conductive portion.
A second step of sandwiching and pressurizing with a receiving electrode having a flat electrode surface, and
A method for manufacturing a stator of a rotary electric machine, which comprises a third step of pressurizing the hook portion and energizing the hook portion at the same time with the receiving side electrode and the main electrode.

Images