JP2021111977A - Stator core of rotary electric machine, stator of rotary electric machine, rotary electric machine, method of manufacturing stator core of rotary electric machine, and method of manufacturing rotary electric machine - Google Patents

Abstract

To provide a stator core of a rotary electric machine, a rotary electric machine, a method of manufacturing a stator core of a rotary electric machine, and a method of manufacturing a rotary electric machine which can prevent degradation of assembly accuracy and productivity even if an adhesive is used.SOLUTION: A laminated core 50 is structured by laminating in an axial direction Y a plurality of core pieces 40 respectively having a core back part 41 and a tooth part 42 protruding from a core inner peripheral surface 44 of an inside X2 in the radial direction X of the core back part 41 toward the inside X2 in the radial direction X. Adhesive joints 9 are formed continuously or intermittently on all core pieces 40 in the axial direction Y on at least any of surfaces forming a slot region 30 surrounded by the tooth part 42 and the core back part 41 of the laminated core 50.SELECTED DRAWING: Figure 8

Description

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

In recent years, rotating electric machines such as electric motors and generators are required to be compact and have high output. It is widely known that the armature core used in a rotary electric machine is composed of a laminated core which is a laminated core of an electromagnetic steel plate to suppress an eddy current generated in the armature core to improve efficiency. As a means of fixing the laminated electromagnetic steel sheets, there are a method of crimping the electromagnetic steel sheets or a method of welding, but since the electromagnetic steel sheets are electrically short-circuited in the laminated direction at the fixed portion, an eddy current is generated and efficiency is achieved. There was a problem that worsened.

Further, since residual stress is generated in the crimped portion or the welded portion, there is a problem that the hysteresis loss increases and the efficiency of the rotary electric machine deteriorates. As a method for solving these problems, a method of fixing electromagnetic steel sheets to each other by adhesion is known (see, for example, Patent Document 1). For example, in the method for manufacturing a laminated iron core described in Patent Document 1, a large number of electromagnetic steel sheets are stacked and the laminated core is tightened and fixed, and then a thermosetting adhesive is impregnated between the electromagnetic steel sheets to impregnate the outer peripheral edge of the core. , An electric motor in which an adhesive is permeated into the inner peripheral edge portion and the inside of the core and cured to fix the core is presented.

Japanese Unexamined Patent Publication No. 2003-324869

In the conventional method of manufacturing the stator core of a rotary electric machine, the stator of a rotary electric machine, the rotary electric machine, the stator core of a rotary electric machine, and the method of manufacturing a rotary electric machine, adhesive adheres to the outer peripheral surface of the laminated core. In addition, when the mounting frame is shrink-fitted or press-fitted onto the outer periphery of the core, there is a problem that the shape accuracy of the core after assembly is lowered due to the adhesive on the outer peripheral surface. Further, when the side surfaces of the laminated cores divided in the circumferential direction are brought into contact with each other in a plane perpendicular to the axial direction and the laminated cores are arranged in an annular shape to assemble the armature iron core, the contact surfaces of the laminated cores are contacted. There is a problem that the assembly accuracy is not stable due to the adhered adhesive and the shape accuracy is lowered.

In addition, since it is necessary to fill all the parts between the electromagnetic steel sheets constituting the laminated core with an adhesive, it is considered that the number of laminated electromagnetic steel sheets of a general laminated core used for rotary electric machines and the like may reach several hundreds. Then, it is necessary to impregnate all of the hundreds of electromagnetic steel sheets with the adhesive, which causes a problem that the productivity is lowered.

The present application discloses a technique for solving the above-mentioned problems, and even when an adhesive is used, the stator core and rotation of a rotary electric machine that prevent a decrease in assembly accuracy and productivity. It is an object of the present invention to provide a method for manufacturing a stator of an electric machine, a rotary electric machine, a stator core of a rotary electric machine, and a method for manufacturing a rotary electric machine.

The stator core of the rotary electric machine disclosed in the present application is
It is a laminated core formed by laminating a plurality of core pieces having a core back portion and a tooth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion. hand,
All the core pieces are axially continuous or intermittent on at least one of the surfaces forming the slot region surrounded by the teeth portion and the core back portion of the laminated core. An adhesive portion is formed on the surface.
Further, the fixed iron core of the rotary electric machine disclosed in the present application is
The core back portion, the teeth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion, and the shoe portion extending in the circumferential direction from the radial inner end of the teeth portion. It is a laminated core configured by laminating a plurality of core pieces having the above in the axial direction.
All of the surfaces forming the slot region surrounded by the teeth portion, the core back portion, and the shoe portion of the laminated core, continuously or intermittently in the axial direction, on at least one of the surfaces. An adhesive portion is formed on the core piece of the above.
Further, the stator of the rotary electric machine disclosed in the present application is:
An insulator is formed on the surface of the laminated core forming the slot region of the stator core of the rotary electric machine described above.
The adhesive portion is formed between the insulator and the laminated core without being adhered to the insulator.
A coil is formed in the slot region via the insulator.
In addition, the rotary electric machine disclosed in the present application is
It is provided with the stator of the rotary electric machine described above and the rotors arranged opposite to the stator through a gap.
Further, the method for manufacturing a stator core of a rotary electric machine disclosed in the present application is as follows.
In a method for manufacturing a stator core of a rotary electric machine, a protrusion protruding toward the one end side in the axial direction is formed on the core piece on one end side in the axial direction of the laminated core.
A punching step of sequentially punching the core pieces from the plate material while forming the convex portions at a predetermined number of laminated cores.
An alignment process in which the core pieces are punched out and the core pieces are vertically laminated and aligned.
A coating step of applying an adhesive to all the core pieces continuously or intermittently in the axial direction on at least one of the surfaces forming the slot region.
A curing step of curing the adhesive and
The plurality of laminated cores continuously adhered by the adhesive in the axial direction are provided with a dividing step of cutting and dividing the adhesive at the position of the convex portion in the axial direction.
Further, the method for manufacturing a rotary electric machine disclosed in the present application is as follows.
An insulator and a coil are installed on the stator core of the rotary electric machine manufactured by the method for manufacturing the stator core of the rotary electric machine described above to form a stator, and the rotors are arranged to face each other through a gap in the stator. It is something that makes you.

According to the method for manufacturing the stator core of a rotary electric machine, the stator of a rotary electric machine, the rotary electric machine, the stator core of a rotary electric machine, and the method for manufacturing a rotary electric machine disclosed in the present application.
Even when an adhesive is used, it is possible to prevent a decrease in assembly accuracy and productivity.

It is sectional drawing which shows the structure of the rotary electric machine in Embodiment 1. FIG. It is sectional drawing which shows the structure of the stator of the rotary electric machine shown in FIG. It is sectional drawing in the MM line of the stator shown in FIG. It is a perspective view which shows the structure before the coil installation with the insulator of the stator of the rotary electric machine shown in FIG. 1 being installed. FIG. 5 is a perspective view showing another configuration in which the insulator of the stator of the rotary electric machine shown in FIG. 1 is installed and before the coil is installed. It is a top view which shows the structure of the core piece of the stator of the rotary electric machine shown in FIG. It is a perspective view which shows the structure of the laminated core of the stator of the rotary electric machine shown in FIG. It is a top view which shows the state which the adhesive part was formed in the core piece shown in FIG. FIG. 3 is a plan view showing another state in which an adhesive portion is formed on the core piece shown in FIG. 6 is a plan view showing a state in which an adhesive portion is formed in a modified example of the core piece shown in FIG. It is a flowchart which shows the manufacturing method of the laminated core shown in FIG. It is a flowchart which shows the manufacturing method of the rotary electric machine in Embodiment 1. It is a figure which shows the manufacturing method of the laminated core in Embodiment 1. FIG. It is a top view which shows the structure of the alignment guide in the alignment process of the manufacturing method of the laminated core shown in FIG. It is a figure which shows the structure of the coating apparatus which applies an adhesive in the coating process of the manufacturing method of the laminated core shown in FIG. It is a top view which shows the structure of the nozzle of the coating apparatus shown in FIG. It is a side view which shows the structure of the nozzle of the coating apparatus shown in FIG. It is a top view which shows the structure of the other nozzle of the coating apparatus shown in FIG. It is a side view which shows the positional relationship between the nozzle and the laminated core shown in FIG. It is a figure which shows the separation process of the manufacturing method of the laminated core shown in FIG. It is a figure which shows the separation process of the manufacturing method of the laminated core shown in FIG. It is a figure which shows the separation process of the manufacturing method of the laminated core shown in FIG. It is a figure which shows the separation process of the manufacturing method of the laminated core shown in FIG. It is a figure which shows the separation process of the manufacturing method of the laminated core shown in FIG. It is a top view which shows the structure of the core piece formed at the separation position between the laminated cores in Embodiment 1. FIG. It is a top view which shows the other structure of the core piece formed at the separation position between the laminated cores in Embodiment 1. FIG. It is a top view which shows the other structure of the core piece formed at the separation position between the laminated cores in Embodiment 1. FIG.

In the following description, each direction in the rotary electric machine 100 is shown as a circumferential direction Z, an axial direction Y, a radial direction X, an outer side X1 of the radial direction X, and an inner side X2 of the radial direction X, respectively. Therefore, in the stator 10 and the rotor 20, and also in other parts, these directions are the same, and each direction will be described with reference to the direction. Further, in the first embodiment, a configuration in which the stator is divided into each tooth portion in the circumferential direction Z is shown as an example. Therefore, even one stator divided in the circumferential direction Z may be similarly shown as a stator.

Embodiment 1.
FIG. 1 is a cross-sectional view showing the configuration of a rotary electric machine according to the first embodiment. FIG. 2 is a cross-sectional view showing the configuration of the stator of the rotary electric machine shown in FIG. FIG. 3 is a cross-sectional view taken along the line MM of the stator shown in FIG. FIG. 4 is a perspective view showing a configuration before the coil is installed and the insulator of the stator of the rotary electric machine shown in FIG. 1 is installed. FIG. 5 is a perspective view showing another configuration in which the insulator of the stator of the rotary electric machine shown in FIG. 1 is installed and before the coil is installed. FIG. 6 is a plan view showing the configuration of the core piece of the stator of the rotary electric machine shown in FIG. FIG. 7 is a perspective view showing the configuration of the laminated core of the stator of the rotary electric machine shown in FIG.

FIG. 8 is a plan view showing a state in which an adhesive portion is formed on the core piece shown in FIG. FIG. 9 is a plan view showing another state in which the adhesive portion is formed on the core piece shown in FIG. FIG. 10 is a plan view showing a state in which an adhesive portion is formed in the modified example of the core piece shown in FIG. FIG. 11 is a flowchart showing a manufacturing method of the laminated core shown in FIG. 7. FIG. 12 is a flowchart showing a manufacturing method of the rotary electric machine according to the first embodiment. FIG. 13 is a diagram showing a method for manufacturing a laminated core according to the first embodiment. FIG. 14 is a plan view showing the configuration of the alignment guide in the alignment step of the method for manufacturing the laminated core shown in FIG.

FIG. 15 is a diagram showing a configuration of a coating device for applying an adhesive in the coating step of the method for manufacturing a laminated core shown in FIG. FIG. 16 is a plan view showing a configuration of a nozzle of the coating device shown in FIG. FIG. 17 is a side view showing the configuration of the nozzle of the coating device shown in FIG. FIG. 18 is a plan view showing the configuration of another nozzle of the coating apparatus shown in FIG. FIG. 19 is a side view showing the positional relationship between the nozzle and the laminated core shown in FIG.

20 to 24 are diagrams showing a separation step of the method for manufacturing the laminated core shown in FIG. 13. FIG. 25 is a plan view showing the configuration of the core pieces formed at the separated positions of the laminated cores in the first embodiment. FIG. 26 is a plan view showing another configuration of the core pieces formed at the separated positions of the laminated cores in the first embodiment. FIG. 27 is a plan view showing another configuration of the core pieces formed at the separated positions of the laminated cores in the first embodiment.

In FIG. 1, the rotary electric machine 100 includes a cylindrical frame 1, an upper bracket 2 and a lower bracket 3 for closing the opening of the frame 1, and a stator 10 as an armature housed in the cylindrical portion of the frame 1. Axial positions of the upper bracket 2 and the lower bracket 3 of the frame 1 are arranged in the axial direction Y via bearings 4 and 5, and are fixed to a rotary shaft 6 rotatably supported in the radial direction X of the stator 10. A rotor 20 that generates a field magnet that is rotatably arranged on the inner peripheral side of the inner X2 is provided.

The rotor 20 is arranged with a rotor core 7 fixed to the rotation shaft 6 inserted at the axial center position and a rotor core 7 attached to the outer peripheral surface side of the rotor core 7 at a pitch set in the circumferential direction Z, respectively. , A permanent magnet type rotor including a plurality of permanent magnets 8 constituting a magnetic pole. The rotor 20 is not limited to the permanent magnet type rotor, and the rotor conductor which is not insulated is housed in the slot of the rotor core, and both sides are short-circuited by a short-circuit ring, or the rotor is insulated. A winding type rotor in which the conductor wire is mounted in the slot of the rotor core may be used.

In FIGS. 2 and 3, the stator 10 is formed in an annular shape and is fixed in the frame 1. The stator 10 is composed of a laminated core 50 as a stator core formed by laminating a predetermined number of core pieces 40 in the axial direction Y, and a magnet wire having an insulating film on the surface of a wire such as copper or aluminum. The formed coil 33 includes an insulator 34 having a function of electrically insulating between the laminated core 50 and the coil 33 and a function of holding the coil 33. The resin material of the insulator 34 is, for example, nylon, polyphenylene sulfide (PPS, Polyphenylene sulfide), liquid crystal polymer (LCP, Liquid Crystal Polymer), polybutylene terephthalate (PBT, polybutylene terephthalate) and the like.

As shown in FIG. 4, the insulator 34 of the first embodiment is integrally molded with the laminated core 50. The insulator 34 has a structure in which both end surfaces of the laminated core 50 in the axial direction Y and the surfaces forming the slot region 30 described later are all covered with resin, and the strength and rigidity of the laminated core 50 can be improved by the insulator 34. ..

The insulator 34 is not limited to this example, and as another example, for example, as shown in FIG. 5, insulators 381 and 382 are mounted on both end faces of the laminated core 50 in the axial direction Y, and slots are provided. Insulators 391 and 392 formed of insulating sheets are attached and installed on the surface forming the region 30, to ensure insulation between the coil 33 and the laminated core 50. The insulators 391 and 392 formed of the insulating sheet are manufactured by sandwiching, for example, an insulating sheet made by sandwiching a polyphenylene sulfide (PPS) film with aramid paper or polyethylene terephthalate (PET) sandwiched between PPS. The insulating sheet can be formed by press molding.

Compared with the case of the insulator 34 of FIG. 4 formed by integral molding, the case of using the insulators 391 and 392 of FIG. 5 can reduce the thickness of the portion covering the surface forming the slot region 30, so that the thermal resistance can be reduced. This has the effect of increasing heat dissipation with respect to the heat generated by the coil 33.

In FIGS. 6 and 7, a laminated core 50 is formed by laminating a large number of core pieces 40 punched from a strip-shaped electromagnetic steel sheet into the same shape in the axial direction Y and integrating them. The core piece 40 includes a core back portion 41, a teeth portion 42, and a shoe portion 43. The core back portion 41 is formed in an arc shape. The tooth portion 42 is formed so as to extend from the central portion of the core inner peripheral surface 44 of the core inner peripheral surface 44 of the inner X2 of the core back portion 41 in the radial direction X to the inner side X2 of the radial direction X. The shoe portion 43 is formed so as to extend from the inner X2 end of the tooth portion 42 in the radial direction X toward both sides in the circumferential direction Z.

The surface of the core piece 40 and the laminated core 50 along the axial direction Y of the outer side X1 of the core back portion 41 in the radial direction X is defined as the outer peripheral surface 47 of the core, and the axial direction Y of the inner side X2 of the radial direction X of the core back portion 41. The surface along the core is defined as the inner peripheral surface 44 of the core. Further, the surfaces of the core back portion 41 along the axial direction Y at both ends of the circumferential direction Z are designated as the core side surface 401. The surfaces of the core piece 40 and the laminated core 50 along the axial directions Y at both ends of the teeth portion 42 in the circumferential direction Z are referred to as the teeth side surfaces 45. Further, the surface of the tooth portion 42 along the axial direction Y of the tip of the inner side X2 of the radial direction X is defined as the tip surface 48. The surface of the core piece 40 and the laminated core 50 along the axial direction Y of the outer side X1 of the shoe portion 43 in the radial direction X is defined as the shoe outer peripheral surface 46.

The region surrounded by the core back portion 41 of the core piece 40, the teeth portion 42, and the shoe portion 43 becomes the slot region 30 in which the coil 33 is arranged. Therefore, each surface of the core piece 40 forming the slot region 30 becomes the core inner peripheral surface 44 of the core back portion 41, the teeth side surface 45 of the teeth portion 42, and the shoe outer peripheral surface 46 of the shoe portion 43. In the first embodiment, a case where the core piece 40 and the laminated core 50 are divided into each tooth portion 42 in the circumferential direction Z will be shown.

The electromagnetic steel sheet forming the core piece 40 has an insulating coating on the surface of a material having a high magnetic permeability. Therefore, even if these are laminated in the axial direction Y, the core pieces 40 adjacent to each other in the axial direction Y are insulated from each other and do not conduct. In order to fix each core piece 40 in this state, an adhesive is applied to any of the core inner peripheral surface 44, the tooth side surface 45, and the shoe outer peripheral surface 46, which are the surfaces forming the slot region 30 of the laminated core 50. An adhesive portion 9 to be described later is formed, and the space between the laminated core pieces 40 in the axial direction Y is fixed.

In the conventional fixing method in the axial direction Y, which is a fixing method by caulking or welding, since the stacks in the axial direction Y are electrically connected, an eddy current is generated in that portion and the iron loss is large. However, since the state in which the stacks of the core pieces 40 in the axial direction Y are insulated is maintained by fixing the adhesive portion 9 as in the first embodiment, the eddy current can be suppressed and the efficiency of the rotary electric machine can be improved.

The adhesive portion 9 is formed on each core piece 40 on at least one of the core inner peripheral surface 44, the tooth side surface 45, and the shoe outer peripheral surface 46 of all the core pieces 40 laminated in the axial direction Y. Is continuously or intermittently straddled in the axial direction Y to be applied and formed. The insulators 34, 391, and 392 formed of the insulating member are arranged on the core inner peripheral surface 44, the tooth side surface 45, and the shoe outer peripheral surface 46 of the core piece 40. The adhesive portion 9 is not adhered to the insulators 34, 391, 392, but is formed between the insulators 34, 391, 392 and the laminated core 50.

8 to 10, a specific example of the formed portion of the adhesive portion 9 will be described. As shown in FIG. 8, an adhesive is applied to the tooth side surface 45 of the tooth portion 42 to form the adhesive portion 9. Since the adhesive is applied to the tooth side surface 45 of the tooth portion 42, a large coating area can be secured and the strength against peeling of the laminate can be increased.

As another example, as shown in FIG. 9, an adhesive is applied to the core inner peripheral surface 44 of the core back portion 41 and the shoe outer peripheral surface 46 of the shoe portion 43, respectively, to form the adhesive portions 91 and 92, respectively. .. If there is a margin in the adhesive strength with respect to the required strength, if the adhesive is applied to such a position to form the adhesive portions 91 and 92, the slot around which the coil 33 is wound is larger than that in the case shown in FIG. The space of the region 30 can be expanded, the space factor of the coil 33 can be increased, and the efficiency of the rotary electric machine 100 can be improved.

If it is desired to further increase the space factor of the coil 33, as shown in FIG. 10, a recess 741 that is dented to the outer side X1 in the radial direction X and extends in the axial direction Y on the core inner peripheral surface 44 of the core back portion 41. Is formed, and the adhesive portion 91 is accommodated in the recess 741. When there is a magnetic margin in the magnetic path on the core back portion 41 side with respect to the amount of magnetic flux passing through the laminated core 50, the recess 741 is provided by the margin, so that the space of the slot region 30 is not narrowed. , The coating space of the adhesive portion 91 can be secured, and the space factor of the coil 33 can be expanded. Hereinafter, when the term "adhesive portion 9" is used, the term "adhesive portion 9" is used as a general term for each of the adhesive portions 9, 91, 92.

As the adhesive for forming the adhesive portion 9, for example, a two-component curable adhesive may be used. The two-component curing type adhesive is composed of a main agent and a curing accelerator, and as the main agent, an epoxy adhesive, an acrylic adhesive, or the like is used. With such a configuration, since there is no heating process, the configuration of the manufacturing equipment can be made compact, and the heat energy can be reduced, which is effective in saving energy.

Further, as the adhesive for forming the adhesive portion 9, for example, a heat-curable adhesive typified by an epoxy-based adhesive may be used. In this case, even if the adhesive adheres to the manufacturing equipment, it does not harden until heat is applied. Therefore, the adhesive adhering to the manufacturing apparatus can be removed by simply wiping it off before the thermosetting, and the maintainability is improved. Further, since the heat-resistant temperature of the heat-curable adhesive is higher than that of the room-temperature-curable adhesive, the heat resistance of the laminated core 50 is improved.

Further, as the adhesive for forming the adhesive portion 9, for example, an ultraviolet curable adhesive may be used. In this case, even if the adhesive adheres to the manufacturing equipment, it does not harden until it is irradiated with ultraviolet rays. Therefore, the adhesive adhering to the manufacturing apparatus can be removed by simply wiping it off before the thermosetting, and the maintainability is improved.

Then, on at least one of the core inner peripheral surface 44 of the core back portion 41 forming the slot region 30 in this way, the teeth side surface 45 of the teeth portion 42, and the shoe outer peripheral surface 46 of the shoe portion 43. Since the adhesive is applied to the core, the adhesive is not applied to the outer peripheral surface 47 of the core. Therefore, after a plurality of laminated cores 50 on which the insulator 34 and the coil 33 are formed are arranged in an annular shape, the inner peripheral surface of the mounting frame 1 is burnt on the outer peripheral surface 47 of the outer side X1 of the laminated core 50 in the radial direction X. Even if it is fitted or press-fitted, the shape accuracy of the stator 10 after assembly can be improved because there is no adhesive on the outer peripheral surface 47 of the core.

Further, when the core side surfaces 401 of the laminated cores 50 adjacent to each other in the circumferential direction Z are brought into contact with each other and a plurality of laminated cores 50 on which the insulator 34 and the coil 33 are formed are arranged in an annular shape to assemble the stator 10. Since the adhesive is not applied to the core side surface 401 of the laminated core 50, the assembly accuracy of the stator 10 is stable and the shape accuracy of the stator 10 is improved. As a result, the torque ripple can be reduced and the performance of the rotating electric machine is improved.

Next, the manufacturing method of the rotary electric machine configured as in the first embodiment will be described with reference to the flowchart of FIG. First, in the laminated core forming step of step ST6 of FIG. 12, the core pieces 40 shown in FIG. 6 are laminated in the axial direction Y to form the laminated core 50 as shown in FIG. At this time, on at least one of the core inner peripheral surface 44 of the core back portion 41 forming the slot region 30, the teeth side surface 45 of the teeth portion 42, and the shoe outer peripheral surface 46 of the shoe portion 43. An adhesive is applied to the laminated core 50, and the adhesive portion 9 is formed on all the core pieces 40 continuously or intermittently in the axial direction Y of the laminated core 50.

Next, in the insulator forming step of step ST7 of FIG. 12, an insulator 34 is formed on the laminated core 50, and the structure is as shown in FIG. Since the bonded portion 9 has already been cured by the insulator forming step, it is not adhered to the insulator 34 and is formed between the insulator 34 and the laminated core 50. Next, in the coil forming step of step ST8 of FIG. 12, a magnet wire is wound around the teeth portion 42 of the divided laminated core 50 to form the coil 33.

Next, in the stator forming step of step ST9 of FIG. 12, a plurality of laminated cores 50 to which the insulator 34 and the coil 33 are mounted are arranged in an annular shape, and the core outer peripheral surface of the core back portion 41 is arranged on the inner peripheral surface of the frame 1. Fix 47. Next, in the rotary electric machine forming step of step ST10 of FIG. 12, the rotating shaft 6 of the rotor 20 is rotatably supported on the upper bracket 2 and the lower bracket 3 by the bearings 4 and 5, and the rotor 20 is supported. The rotary electric machine 100 is formed by arranging the stator 10 so as to face each other via a gap.

The laminated core forming step in the manufacturing method of the rotary electric machine 100 shown above will be described in detail with reference to the flowchart of FIG. 11 and FIG. First, in the punching step of step ST1 of FIGS. 11 and 13, the electromagnetic steel sheet 301 as a strip-shaped plate material wound in a reel shape is pulled out by an anchorer and fed into a hydraulic or electric press machine by a feeding device. In the press machine, the die 302 of the die and the first punch 303 are used to punch out the core piece 40 into a predetermined shape. Prior to the punching, a convex portion 400 (see FIG. 25) protruding in the axial direction Y is formed on the electromagnetic steel plate 301 by the second punch 304 for each specified number of sheets.

Each of the punches 303 and 304 is configured to be able to be taken in and out of the die by a cam mechanism mounted in the die and an air cylinder or a servomotor, and the cylinder or servomotor is instructed by the controller of the press machine. Is controlled and put in and out.

Next, in the alignment step of step ST2 of FIGS. 11 and 13, the punched core pieces 40 are aligned by the alignment guide 305 and laminated in the stacking direction Y to form the laminated core 50. The stacking direction Y and the axial direction Y shown above are the same direction. Next, in the coating step of step ST3 of FIGS. 11 and 13, on at least one of the core inner peripheral surface 44, the tooth side surface 45, and the shoe outer peripheral surface 46 of the core piece 40 of the laminated core 50. The adhesive 307 is continuously applied in the axial direction Y.

Next, in the curing step of step ST4 of FIGS. 11 and 13, the adhesive 307 is heated by the heater 306 and cured to form the adhesive portion 9. From the alignment step to the curing step, the alignment guide 305 continues to restrain the laminated core 50. Next, in the division step of step ST5 of FIGS. 11 and 13, the adhesive portion 9 is cut by the cutting device 308 at the position in the axial direction Y where the convex portion 400 of the laminated core 50 continuous in the axial direction Y is formed. Then, it is divided into each laminated core 50. In the following description, the adhesive 307 will be described as the adhesive 307 even when the adhesive 307 is cured and formed as the adhesive portion 9 and before the adhesive is cured and the adhesive 307 is used.

The details of each step will be further described below. First, the alignment process will be described. Specifically, the alignment guide 305 used in the alignment step includes a first regulation portion 31 that presses the core outer peripheral surface 47 of the core back portion 41 of the core piece 40 shown in FIG. 14, and a teeth portion 42 of the core piece 40. A second regulating unit 32 that presses the tip surface 48 of the above, and a third regulating unit 333 that presses the tooth side surface 45 of the teeth portion 42 are provided. Then, the position of the core piece 40 is regulated by the alignment guide 305, and the plurality of core pieces 40 are aligned in the stacking direction Y.

In FIG. 14, the first regulation unit 31, the second regulation unit 32, and the third regulation unit 333 have separate structures, but if they have these functions, they have an integrated structure. It may be configured. Further, it is not always necessary to provide all the regulating portions 31, 32, 333, and it is sufficient that the core pieces 40 can be aligned in the stacking direction Y. For example, it is conceivable that only the first regulation unit 31 and the second regulation unit 32 are provided, and the third regulation unit 333 is not provided. In that case, since the third regulating portion 333 located in the slot region 30 does not exist, it is possible to easily move to the subsequent step of applying the adhesive 307.

Next, the bonding process will be described. For example, as shown in FIG. 15, the coating device 22 of the adhesive 307 has a nozzle 240 having a path portion 222 and 223 connected to a syringe 221 containing the adhesive 307 via a dispenser control device 220 that feeds the adhesive 307. It has. As shown in FIGS. 15 and 16, for example, when the adhesive 307 is applied to the core inner peripheral surface 44 of the core back portion 41 and the shoe outer peripheral surface 46 of the shoe portion 43, the nozzle 240 is inside the nozzle 240. After the adhesive 307 sent from the dispenser control device 220 flows into the nozzle 240, it is branched into two paths, and the core of the core back section 41 is branched via the path sections 222 and 223. It is applied to the inner peripheral surface 44 and the shoe outer peripheral surface 46 of the shoe portion 43 at the same time.

As shown in FIGS. 17 and 19, a positioning portion 231 is formed in the nozzle 240, and the positioning portion 231 is brought into contact with the coating surface of the laminated core 50. As shown above, the coated surfaces include the core inner peripheral surface 44 of the core back portion 41 forming the slot region 30, the teeth side surface 45 of the teeth portion 42, and the shoe outer peripheral surface of the shoe portion 43. It shows at least one surface of 46, and the description thereof will be omitted below.

Further, the adhesive 307 is ejected from the nozzle 240 in the introduction direction D. The nozzle 240 has a smoothing surface 230 of the adhesive 307 at a position separated from the coating surface of the laminated core 50 by a certain distance H1, H2, H3 (the distance H3 will be described later), and accordingly. Adhesive 307 is smoothed. Since the leveling surface 230 is formed in advance on a surface separated from the coated surface of the core piece 40 by a predetermined distance H1, H2, H3, the thickness of the adhesive 307 after leveling is the same as the leveling surface 230. The thickness of the core piece 40 is made uniform according to the distances H1, H2, and H3 from the coated surface.

An example of the core inner peripheral surface 44 of the core back portion 41 and the shoe outer peripheral surface 46 of the shoe portion 43 is shown as the coated surface of the adhesive 307, but the present invention is not limited to this, and the core back portion 41 is not limited thereto. It is also conceivable to apply the adhesive 307 to the tooth side surface 45 of the tooth portion 42 in addition to each surface of the core inner peripheral surface 44 and the shoe outer peripheral surface 46 of the shoe portion 43. In that case, as in the nozzle 240 shown in FIG. 18, the adhesive 307 can be similarly applied by providing the path portions 222, 223, and 224 with three branches, and the positioning portion 231 and the smoothing surface 230 are similarly applied. The thickness of the adhesive 307 can be similarly made uniform by arranging the adhesive 307 at a predetermined distance H3. Further, when the thickness of the adhesive 307 is changed for each coated surface of the adhesive 307, the predetermined distance can be changed by setting the distances H1, H2, and H3 from the positioning portion 231 of the nozzle 240 to the smoothing surface 230, respectively. can.

Further, the nozzle 240 is supported by a guide mechanism (not shown) so as to be movable in the vertical direction E and the stacking direction Y shown in FIG. 15, and the position of the nozzle 240 can be appropriately changed by an actuator such as a cylinder or a servomotor. As a result, the thickness of the adhesive 307 can be kept constant for each mold against the dimensional variation of the core piece 40 due to the difference in the mold. Further, the nozzles 240 may be installed independently of each other. This makes it possible to change the distances H1, H2, and H3 from the core piece 40 to the smoothing surface 230 for each coated portion, and the dimensions of each portion when the core piece 40 is punched out using a plurality of types of dies. It can be individually adjusted in response to variations, the thickness of the adhesive 307 can be stabilized, and variations in adhesive strength can be reduced.

Next, the curing process will be described. If the adhesive used is a heat-curable type as shown above, a heater 306 for heating is installed and the adhesive is cured by applying heat. Further, by providing a heat insulating mechanism between the heater 306 and the alignment guide 305 of the core piece 40, the heat of the heater 306 is suppressed from being transferred to the alignment guide 305, the dimensional change due to thermal expansion of the alignment guide 305 is suppressed, and the core is suppressed. It is possible to prevent deterioration of the alignment accuracy of the piece 40.

As another example, when an ultraviolet curable adhesive is used, an ultraviolet irradiation device is installed instead of the heater 306, and the adhesive is irradiated with ultraviolet rays to cure it. Compared with the heat-curable type, the ultraviolet-curable adhesive does not apply heat, so that it is not necessary to install the heat insulating mechanism as described above, and the manufacturing equipment can be simplified and downsized.

Further, as another example, in the case of a two-component mixed type room temperature curing type adhesive or an anaerobic adhesive, it can be cured while the laminated core 50 is held by the alignment guide 305, and is used for curing. There is no need to install a separate manufacturing facility.

Moreover, although it is shown as a curing step, it is not necessary to completely cure each of the above adhesives in the above manufacturing equipment. Therefore, the curing step may be fixed to such an extent that the stacking of the stator 10 in the axial direction Y is not cracked or separated during transportation after being taken out from the manufacturing equipment. In a post-step (not shown), if it is a heat-curing type, it may be completely cured by adding a heating step, and if it is an ultraviolet-curing type, it may be completely cured by further irradiating it with ultraviolet rays. In either case, since the adhesive shrinks during complete curing, the stacking accuracy changes. Therefore, it is better to guide the laminated core 50 with a jig or the like to cure it.

Next, the dividing step will be described with reference to FIGS. 20 to 24 together with the punching step. As shown in FIG. 20, a support portion 310 for supporting the laminated core 50 from below is installed on the discharge side of the laminated core 50. The support portion 310 faces upward with respect to the lowermost portion of the laminated core 50 so that there is no gap between the laminated cores 50 in which the core pieces 40 are laminated in the axial direction Y before the division step. It has a mechanism that can apply a load F2. For example, an air cylinder or a hydraulic cylinder is used as an actuator of the support portion 310, and the actuator is driven up and down in the stacking direction Y.

Further, the cutting device 308 can move in the stacking direction Y and the vertical direction E shown in FIG. 20 with respect to the stacking core 50. Then, the magnitude of the press load F1 when punching the core piece 40 with the press machine is set so that F1> F2 as compared with the load F2 of the support portion 310. When the core piece 40 is punched out by the press load F1 and pushed in the traveling direction Y1, the load F2 on the support portion 310 side loses to the press load F1 and is pushed toward the traveling direction Y1. The press load F1 and the load F2 are loads that sandwich the laminated core 50 in the axial direction Y.

As shown above in the punching step, the core pieces 40 punched into the shape of the predetermined core pieces 40 are laminated in the stacking direction Y. A convex portion 400 is formed on the stage before the core piece 40 is punched out. Therefore, the core piece 40 in which the convex portion 400 is formed and the core piece 40 in which the convex portion 400 is not formed are sequentially punched and laminated. However, the core pieces 40 on which the convex portion 400 is formed are formed for each predetermined number of core pieces 40 of the laminated core 50.

Then, a gap T corresponding to the height of the convex portion 400 is generated between the core piece 40 in which the convex portion 400 is formed and the core piece 40 punched one before (on the Y1 side in the traveling direction). On the other hand, the adhesive 307 is continuously applied in the stacking direction Y, and the continuous laminated cores 50 separated by the gap T formed by the convex portion 400 are formed by the adhesive 307 continuous in the axial direction Y. It will be in a connected state (Fig. 21). After that, the laminated cores 50 that are no longer restrained by the alignment guide 305 after the curing step are discharged from the alignment guide 305 while being supported by the support portion 310 described above (FIG. 22).

Next, the cutting device 308 for cutting the adhesive 307 from both sides is moved to the inner direction E1 of the laminated core 50 with respect to the gap T generated between the laminated cores 50 by the convex portion 400, and the laminated core The adhesive 307 that connects 50 to each other is cut (FIG. 23). Next, after cutting the adhesive 307, the cutting device 308 is moved to the outer direction E2 of the laminated core 50. Then, the support portion 310 is lowered in the traveling direction Y1 to separate the laminated cores 50 from each other. Then, the laminated core 50 is pushed out from the support portion 310 by a cylinder or the like, or is grabbed and taken out by a robot to be discharged in the discharge direction A (FIG. 24).

Since the punching step of the core piece 40 is continued even when the adhesive 307 is cut, the adhesive 37 at the cut portion is moving in the traveling direction Y1 in the stacking direction Y. Therefore, the cutting device 308 is installed on a drive device that can move up and down with respect to the stacking direction Y so as to be able to follow the movement in the traveling direction Y1, and is controlled so that the cutting device 308 can move in synchronization with the movement of the core piece 40. Will be done.

Alternatively, a method of mounting the cutting device 308 on the support portion 310 described above can be considered. Further, the upper and lower positions of the stacking direction Y are controlled by a servomotor or the like so that the position of the cutting device 308 can be corrected. As a result, the stacking thickness of the laminated core 50 varies due to the plate thickness tolerance, and even if the position of the cutting device 308 varies, the position of the cutting device 308 can be corrected, so that stable cutting can be performed.

The convex portion 400 formed on the core piece 40 is not limited to this, and for example, as shown in FIG. 26, three round-shaped convex portions 410 protruding in the axial direction Y are formed on the core piece 40. You may. In this way, a plurality of convex portions 410 may be provided. Further, in the case of a plurality of convex portions 410 such as three in this way, the force on the core piece 40 on the traveling direction Y1 side pulled out in the previous step is equalized, so that the core piece 40 on the traveling direction Y1 side is stable. Can be pressed. Further, as another example, as shown in FIG. 27, three quadrangular convex portions 420 projecting in the axial direction Y may be formed on the core piece 40.

In the first embodiment, the case of the core piece 40 in which the shoe portion 43 is formed is shown, but the present invention is not limited to this, and the core piece in which the shoe portion 43 is not formed, that is, the core piece A core piece in which only the core back portion 41 and the teeth portion 42 are formed in 40 can be manufactured in the same manner. In that case, the slot area 30 is an area surrounded by the core back portion 41 and the teeth portion 42, and the surface forming the slot region 30 is the core inner peripheral surface 44 of the core back portion 41 and the teeth side surface of the teeth portion 42. 45, and a laminated core can be formed or manufactured in the same manner as in the first embodiment.

Further, in the first embodiment, as the stator core, the example of the laminated core 50 divided into each tooth portion 42 in the circumferential direction Z is shown, but the present invention is not limited to this, and the stator core is not limited to this. , Even when both ends of the core piece 40 shown in FIG. 6 and the circumferential direction Z of the laminated core 50 shown in FIG. 7 are connected to or connected to the other core piece 40 and the laminated core 50, the above-described implementation is performed. It can be formed or manufactured in the same manner as in Form 1.

The stator core of the rotary electric machine of the first embodiment configured as described above is
It is a laminated core formed by laminating a plurality of core pieces having a core back portion and a tooth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion. hand,
All the core pieces are axially continuous or intermittent on at least one of the surfaces forming the slot region surrounded by the teeth portion and the core back portion of the laminated core. Since the adhesive part is formed in
Further, the stator core of the rotary electric machine of the first embodiment configured as described above is
The core back portion, the teeth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion, and the shoe portion extending in the circumferential direction from the radial inner end of the teeth portion. It is a laminated core configured by laminating a plurality of core pieces having the above in the axial direction.
All of the surfaces forming the slot region surrounded by the teeth portion, the core back portion, and the shoe portion of the laminated core, continuously or intermittently in the axial direction, on at least one of the surfaces. Since an adhesive portion is formed on the core piece of
Further, the stator of the rotary electric machine of the first embodiment configured as described above is
An insulator is formed on the surface of the laminated core forming the slot region of the stator core of the rotary electric machine.
The adhesive portion is formed between the insulator and the laminated core without being adhered to the insulator.
Since a coil is formed in the slot region via the insulator,
Further, the rotary electric machine of the first embodiment configured as described above is
Since the stator of the rotary electric machine and the rotors arranged so as to face each other through the gap are provided, the stator is provided.
The core pieces are not crimped or glued between the core pieces in the axial direction, but are fixed in the axial direction by the adhesive portion formed on the surface forming the slot region of the core pieces to form a laminated core. It is possible to suppress the eddy current generated between the axial directions of and reduce the loss. In addition, the assembly accuracy of the stator is stable, the shape accuracy of the stator is improved, and the torque ripple is reduced, so that the performance of the rotating electric machine is improved. Further, when the plurality of laminated cores is as many as several hundred, it is not necessary to impregnate all of the core pieces in the axial direction at several hundred places with the adhesive, and the productivity is improved. Further, since the adhesive is not filled between the layers, the space factor of the core piece is improved and the output density of the rotary electric machine is improved. Further, even if the outer peripheral surface of the core of the core back portion is shrink-fitted or press-fitted into the frame, since there is no adhesive on the outer peripheral surface of the core of the core back portion, the shape accuracy after assembling the stator can be improved.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
Since the laminated core is formed by dividing each tooth portion in the circumferential direction,
When both ends of the divided laminated core in the circumferential direction are brought into contact with each other and arranged in a ring shape, the adhesive does not adhere to both ends of the laminated core in the circumferential direction, so that the assembly accuracy of the stator is stable and the stator Shape accuracy is improved. As a result, the torque ripple is reduced and the performance of the rotating electric machine is improved.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
When the adhesive portion is formed on the surface of the core back portion that forms the slot region,
Since the surface of the core back portion forming the slot region is provided with a concave portion that is dented outward in the radial direction and extends in the axial direction in which the adhesive portion is arranged.
Since the adhesive portion is arranged in the recess, it can be configured without narrowing the slot area, the space factor of the coil is improved, and the efficiency of the rotary electric machine is improved.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
Since the adhesive portion is composed of an ultraviolet curable adhesive that is cured by irradiation with ultraviolet rays,
The laminated core can be fixed in a short time and productivity is improved.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
Since the adhesive portion is composed of an anaerobic adhesive,
The cost is low because no equipment is required to cure the adhesive.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
Since the adhesive portion is composed of a thermosetting adhesive,
The heat resistance of the laminated core can be improved.

Further, according to the stator of the rotary electric machine of the first embodiment configured as described above,
Since the insulator is integrally molded with the laminated core,
The laminated core can be firmly fixed.

Further, according to the stator core of the rotary electric machine of the first embodiment configured as described above,
Since the core piece on either one end side in the axial direction of the laminated core is formed with a convex portion protruding toward the one end side in the axial direction,
Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
A punching step of sequentially punching the core pieces from the plate material while forming the convex portions at a predetermined number of laminated cores.
An alignment process in which the core pieces are punched out and the core pieces are vertically laminated and aligned.
A coating step of applying an adhesive to all the core pieces continuously or intermittently in the axial direction on at least one of the surfaces forming the slot region.
A curing step of curing the adhesive and
Since the plurality of laminated cores continuously adhered by the adhesive in the axial direction are provided with a dividing step of cutting and dividing the adhesive at the position of the convex portion in the axial direction.
Further, according to the manufacturing method of the rotary electric machine of the first embodiment configured as described above,
An insulator and a coil were installed on the stator core of the rotary electric machine manufactured by the above-mentioned method for manufacturing the stator core of the rotary electric machine to form a stator, and the rotors were arranged to face each other through a gap in the stator. ,
The laminated core can be easily divided and formed at the position of the core piece in which the convex portion is formed.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
In the coating step, the adhesive is smoothed after the adhesive is applied in a direction away from the coating surface of the adhesive on at least one of the surfaces forming the slot region.
The thickness of the adhesive can be made uniform, and the strength variation of the laminated core can be reduced.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
In the coating step, the adhesive is applied while positioning the coating position of the adhesive and the laminated core.
The accuracy of the adhesive application position can be improved.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
In the coating step, the fixed distance from the coated surface of the adhesive for smoothing the adhesive is changed to a predetermined distance.
By changing a certain distance with respect to the dimensional variation of the laminated core, the external position of the adhesive can be kept constant, and the strength variation of the laminated core can be reduced.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
Since a load for sandwiching the laminated core in the axial direction is applied between the coating step and the curing step,
It is possible to suppress variations in the axial position of the laminated core.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
In the alignment step, the outer peripheral surface of the core in the radial direction of the core back portion and the tip surface of the inner tip surface in the radial direction of the teeth portion are guided for alignment.
Even if the slot area is not used as a guide, the coating process can be easily performed while aligning the laminated cores.

Further, according to the method for manufacturing the stator core of the rotary electric machine according to the first embodiment configured as described above,
In the coating step, the ultraviolet curable adhesive is used,
Since ultraviolet rays are irradiated in the curing step,
By using an ultraviolet curable adhesive, the laminated core can be fixed in a short time and the productivity of the laminated core is improved.

Although the present disclosure describes exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to the application of a particular embodiment, but alone. Alternatively, it can be applied to embodiments in various combinations.
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.

1 frame, 10 stator, 100 rotary electric machine, 2 upper bracket, 20 rotor, 22 coating device, 220 dispenser control device, 221 syringe, 222 path section, 223 path section, 224 path section, 230 leveling surface, 231 positioning Department,
240 nozzles, 3 lower brackets, 30 slot areas, 301 electrical steel sheets,
302 Die, 303 1st Punch, 304 2nd Punch, 305 Alignment Guide,
306 Heater, 307 Adhesive, 308 Cutting Machine, 31 First Regulator,
310 Support, 32 2nd Regulator, 33 Coil, 333 3rd Regulator,
34 Insulator, 381 Insulator, 382 Insulator,
391 insulator, 392 insulator, 4 bearings, 40 core pieces,
400 convex part, 401 core side surface, 41 core back part, 410 convex part,
42 teeth part, 420 convex part, 43 shoe part, 44 core inner peripheral surface,
45 tooth side surface, 46 shoe outer peripheral surface, 47 core outer peripheral surface, 48 tip surface,
5 bearings, 50 laminated cores, 6 rotating shafts, 7 rotor cores, 741 recesses,
8 Permanent magnet, 9 Adhesive part, 91 Adhesive part, 92 Adhesive part, A Discharge direction,
D introduction direction, E vertical direction, F1 press load, F2 load, H1 distance,
H2 distance, H3 distance, T gap, X radial direction, X1 outside, X2 inside,
Y-axis direction, Y stacking direction, Y1 traveling direction, Z circumferential direction.

Claims (19)

It is a laminated core formed by laminating a plurality of core pieces having a core back portion and a tooth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion. hand,
All the core pieces are axially continuous or intermittent on at least one of the surfaces forming the slot region surrounded by the teeth portion and the core back portion of the laminated core. A stator core of a rotating electric machine on which an adhesive part is formed. The core back portion, the teeth portion protruding inward in the radial direction from the inner peripheral surface of the core in the radial direction of the core back portion, and the shoe portion extending in the circumferential direction from the radial inner end of the teeth portion. It is a laminated core configured by laminating a plurality of core pieces having the above in the axial direction.
All of the surfaces forming the slot region surrounded by the teeth portion, the core back portion, and the shoe portion of the laminated core, continuously or intermittently in the axial direction, on at least one of the surfaces. A stator core of a rotary electric machine in which an adhesive portion is formed on the core piece of the above. The stator core of the rotary electric machine according to claim 1 or 2, wherein the laminated core is formed by dividing each tooth portion in the circumferential direction. When the adhesive portion is formed on the surface of the core back portion that forms the slot region,
Any one of claims 1 to 3, wherein the surface of the core back portion forming the slot region is provided with a concave portion that is dented outward in the radial direction and extends in the axial direction in which the adhesive portion is arranged. The stator core of the rotary electric machine described in the section. The stator core of a rotary electric machine according to any one of claims 1 to 4, wherein the adhesive portion is composed of an ultraviolet curable adhesive that is cured by irradiation with ultraviolet rays. The stator core of a rotary electric machine according to any one of claims 1 to 4, wherein the adhesive portion is composed of an anaerobic adhesive. The stator core of a rotary electric machine according to any one of claims 1 to 4, wherein the adhesive portion is composed of a thermosetting adhesive. The rotary electric machine according to any one of claims 1 to 7, wherein a convex portion protruding toward the one end side in the axial direction is formed on the core piece on any one end side in the axial direction of the laminated core. Stator iron core. An insulator is formed on the surface of the laminated core forming the slot region of the stator core of the rotary electric machine according to any one of claims 1 to 8.
The adhesive portion is formed between the insulator and the laminated core without being adhered to the insulator.
A stator of a rotary electric machine in which a coil is formed in the slot region via the insulator. The stator of a rotary electric machine according to claim 9, wherein the insulator is integrally molded with the laminated core. A rotary electric machine comprising the stator of the rotary electric machine according to claim 9 or 10, and a rotor arranged so as to face the stator with a gap. In the method for manufacturing a stator core of a rotary electric machine according to claim 8.
A punching step of sequentially punching the core pieces from the plate material while forming the convex portions at a predetermined number of laminated cores.
An alignment process in which the core pieces are punched out and the core pieces are vertically laminated and aligned.
A coating step of applying an adhesive to all the core pieces continuously or intermittently in the axial direction on at least one of the surfaces forming the slot region.
A curing step of curing the adhesive and
A stator core of a rotary electric machine provided with a dividing step of cutting and dividing the plurality of laminated cores continuously adhered by the adhesive in the axial direction at the positions of the convex portions in the axial direction. Manufacturing method. 12. Claim 12 in which, in the coating step, the adhesive is smoothed after the adhesive is applied in a direction away from the coated surface of the adhesive on at least one of the surfaces forming the slot region. A method for manufacturing a stator core of a rotary electric machine according to. The method for manufacturing a stator core of a rotary electric machine according to claim 13, wherein in the coating step, the adhesive is applied while positioning the adhesive coating position and the laminated core. The method for manufacturing a stator core of a rotary electric machine according to claim 13 or 14, wherein in the coating step, the fixed distance from the coated surface of the adhesive for smoothing the adhesive is changed to a predetermined distance. .. The method for manufacturing a stator core of a rotary electric machine according to any one of claims 12 to 15, wherein a load for sandwiching the laminated core in the axial direction is applied between the coating step and the curing step. .. 10. The method for manufacturing a stator core of a rotary electric machine according to the description. In the coating step, the ultraviolet curable adhesive is used,
The method for manufacturing a stator core of a rotary electric machine according to any one of claims 12 to 17, wherein in the curing step, ultraviolet rays are irradiated. An insulator and a coil are installed on the stator core of the rotary electric machine manufactured by the method for manufacturing the stator core of the rotary electric machine according to any one of claims 12 to 18 to form a stator, and the stator is formed. A method for manufacturing a rotary electric machine in which rotors are arranged to face each other through a gap in the child.

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