JP6066936B2 - Laminated core manufacturing method, stator manufacturing method - Google Patents

Description

This invention relates to a method for manufacturing a stator core that make up the product layers core of a rotating electric machine, relates to a method for manufacturing a stator, and more particularly to a magnetic property and assembling workability improved laminated core.

  Conventional laminated iron cores have a low magnetic flux density in the teeth portion of a stator core formed by laminating stator core sheets formed by punching electromagnetic steel sheets, and provide a kerase at a portion where the change in magnetic flux is small, thereby fixing between the laminations of the core sheets. A technique has been proposed (see, for example, Patent Document 1).

JP 2000-69693 A

  In such a laminated iron core, although the magnetic flux density in the teeth part is low and the change in magnetic flux is small, the teeth part is provided with karamase, which obstructs the passage of magnetic flux, increases the magnetic resistance, and increases the magnetic resistance of the iron core. There was a problem of deteriorating the characteristics. In addition, a gap is formed between the layers by Karamase, and the coil is tightened when the coil is wound around the tooth portion. At this time, since only the teeth part is tightened, the split laminated iron core is deformed in a drum shape and the accuracy is deteriorated. When the accuracy of the laminated iron core is deteriorated, the torque pulsation of the motor is increased or the laminated iron core is assembled as a stator. However, there was a problem that the assembly workability deteriorated.

The present invention has been made to solve the above problems, to reduce the magnetic resistance of teeth, method of manufacturing accuracy and product layer core that can realize an improvement of the assembling workability of the laminated core segment An object is to obtain a method for manufacturing a stator.

The method of manufacturing a laminated core according to the present invention is as follows:
A manufacturing method of a laminated core comprising a back yoke part and a teeth part protruding from the back yoke part, and a plurality of divided laminated cores obtained by laminating iron core pieces punched from electromagnetic steel sheets, connected in an annular shape,
An iron core piece punching step in which a notch is provided at the tip of the teeth portion and the iron core piece is punched out from the electromagnetic steel sheet;
Lamination step of laminating the core pieces and configuring the split laminated core having a groove extending in the axial direction at the tip on the inner peripheral side of the divided laminated teeth portion;
A pressurizing step of pressurizing the divided laminated back yoke part in the laminating direction from both ends in the laminating direction, which is a portion where the back yoke part is laminated;
Adhesive injection in which the adhesive is dropped into the groove of the divided laminated tooth portion with the tip of the divided laminated tooth portion facing upward while performing the pressurizing step. Process,
A depressurization step of stopping the pressurization to the divided laminated back yoke portion before the adhesive is cured;
And an assembly step of configuring the laminated core by combining the divided laminated cores in an annular shape.

  The stator manufacturing method according to the present invention includes a coil winding step of winding a coil around the divided laminated teeth portion in the above-described laminated core manufacturing method.

Method for producing a locking Ru product layer core to the present invention, according to the manufacturing method of the stator, by filling the adhesive in the gap between the lamination, it is possible to increase the rigidity of the core, the coil split multilayer teeth When wound, the deterioration of the accuracy of the laminated core due to tightening can be suppressed, the torque pulsation of the rotating electrical machine using the laminated core and the stator can be reduced, and the assembly workability can be improved. Furthermore, by improving the rigidity of the iron core, it is possible to suppress vibration and noise of a rotating electric machine that uses a laminated iron core and a stator.

It is the top view and sectional drawing of a stator using the laminated iron core which concerns on Embodiment 1 of this invention. It is the top view and sectional drawing of one division | segmentation laminated | stacked iron core which wound the coil via the insulator which concerns on Embodiment 1 of this invention. It is a top view of the iron core piece which concerns on Embodiment 1 of this invention. It is the figure which looked at the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention from the inner peripheral side. It is a figure which shows the adhesive agent injection | pouring process which inject | pours an adhesive agent between lamination | stacking of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is a figure which shows the adjustment process which corrects the shape of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is a figure which shows the other example of the groove | channel which concerns on Embodiment 1 of this invention. It is a figure which shows the other example of the groove | channel which concerns on Embodiment 1 of this invention. It is a figure explaining the tightening by the winding of a general coil. It is a top view of the division | segmentation laminated | stacked iron core which shows the other example of the crimping | crimped part which concerns on Embodiment 1 of this invention. It is the top view and sectional drawing of the division | segmentation laminated | stacked iron core which provided the welding part which fixes between lamination | stacking to the outer peripheral surface of the lamination | stacking back yoke part which concerns on Embodiment 1 of this invention. It is a perspective view of the division | segmentation laminated | stacked iron core which concerns on Embodiment 2 of this invention. It is a top view of the iron core piece which concerns on Embodiment 2 of this invention. It is a figure which shows the state (one lamination | stacking of lamination | stacking iron core) in which the iron core piece which concerns on Embodiment 2 of this invention was combined cyclically | annularly. It is the top view and sectional drawing of the division | segmentation laminated | stacked iron core which concern on Embodiment 3 of this invention. It is a schematic diagram which shows the state which the adhesive agent dripped at the hole which concerns on Embodiment 3 of this invention osmose | permeates the clearance gap between lamination | stacking. It is a top view of the stator which wound the coil around the laminated iron core concerning Embodiment 4 of the present invention. It is a figure which shows the adhesive agent injection | pouring process of dripping an adhesive agent to the clearance gap between lamination | stacking of the division | segmentation laminated | stacked iron core of FIG.

Embodiment 1 FIG.
Hereinafter, a laminated iron core, a stator, a method for producing a laminated iron core, and a method for producing a stator according to Embodiment 1 of the present invention will be described with reference to the drawings.
In this specification, the terms “inner circumferential side, outer circumferential side, radial direction, circumferential direction, axial direction” unless otherwise specified, the inner circumferential side, outer circumferential side, radial direction, circumferential direction, shaft of the stator 100. Say the direction.
FIG. 1A is a plan view showing a stator 100 of a rotating electric machine constructed by assembling a split laminated core 2 around which a coil 3 is wound in an annular shape.
FIG.1 (b) is sectional drawing in the XX line of Fig.1 (a).
2A is a plan view of one split laminated core 2 in which the coil 3 is wound via the insulator 5, and FIG. 2B is a cross-sectional view taken along line YY in FIG. 2A. FIG.
A stator 100 of a rotating electrical machine is configured by arranging a plurality of divided laminated iron cores 2 around which a coil 3 is wound via an insulator 5 in an annular shape and shrink-fitting or press-fitting a frame 4 on the outer periphery.
In this specification, a product obtained by combining the split laminated cores 2 in a ring shape is referred to as a laminated core 20.

  The insulator 5 is attached to the divided laminated teeth portion 21 of the divided laminated iron core 2 from both ends in the lamination direction. A coil 3 is wound around the split laminated iron core 2 via the insulator 5. The insulator 5 has both a function of a winding frame that allows the coil 3 to be wound at a predetermined position and a function of insulating the divided laminated core 2 and the coil 3.

FIG. 3A is a plan view of the core pieces 2 a at both ends of the laminated laminated core 2. Strictly speaking, as shown in FIG. 1 (b), the two core pieces 2a at both ends are different in the shape of the caulking portion that fastens between the stacked layers. However, since this is the only difference, in this specification, the core piece 2a is used.
FIG. 3B is a plan view of the iron core piece 2 b constituting the intermediate layer other than the iron core pieces 2 a of the divided laminated iron core 2. The iron core piece 2b is different from the iron core piece 2a in that it has a V-shaped cutout b1 at the center of the inner peripheral side tip of the tooth portion 2bt.

  The divided laminated iron core 2 is configured by laminating iron core pieces 2a and 2b formed by punching electromagnetic steel sheets. The iron core pieces 2a, 2b are composed of back yoke portions 2ay, 2by extending in the circumferential direction of the stator 100 and teeth portions 2at, 2bt projecting radially inward from the back yoke portions 2ay, 2by, and the back yoke portion 2ay. A crimping portion 6 is provided at 2 by. The caulking portion 6 forms a protrusion by punching in the stacking direction, and forms a concave portion on the upper surface and a convex portion on the lower surface. As shown in the drawing, only the hole may be provided in the lowermost iron core piece 2a (the right end in FIG. 2B). By fitting the concave and convex portions of the caulking portion 6 adjacent to each other, all the core pieces 2a and 2b are connected in the stacking direction.

FIG. 4 is a view of the divided laminated iron core 2 as seen from the inner peripheral side.
A groove M is formed by stacking the V-shaped notches b1 of the core piece 2b at the tip on the inner peripheral side of the divided laminated tooth portion 21 of the divided laminated core 2. Moreover, since there is no notch in the inner peripheral side tip of the teeth portion 2at of the iron core pieces 2a at both ends, both ends of the groove M are closed. Adhesive 7 is injected into the gap S between the stacks of adjacent core pieces 2a, 2b, and the adjacent core pieces 2a, 2b are fixed together. Here, in each figure, the figure in which the adhesive 7 is injected only into the divided laminated tooth portion 21 is shown. Of course, the adhesive 7 is entirely applied between the laminated layers of the divided laminated back yoke portion 22 and the divided laminated iron core 2. May be injected.

Next, the manufacturing method of the division | segmentation laminated | stacked iron core 2 is demonstrated.
FIG. 5 is a diagram showing a pressurizing process and an adhesive injecting process when injecting an adhesive between the laminated laminated cores 2.
FIG. 6 is a diagram illustrating an adjustment process for correcting the shape of the divided laminated core 2 after the adhesive injection process.

  After punching the core pieces 2a and 2b from the magnetic steel sheet, the core pieces 2a are laminated at both ends, a predetermined number of the core pieces 2b are laminated on the intermediate layer, and the crimping portion 6 is strengthened by applying pressure from both ends of the lamination in the lamination direction. Are connected to each other in the stacking direction (stacking step). Next, after the insulator 5 is mounted on the split laminated iron core 2, the split laminated back yoke portion 22 is pressed so as to be sandwiched from both ends of the laminate in the direction indicated by the arrow I in FIG. A gap S is generated between the laminations particularly at the tip side of the lamination tooth portion 21 (pressurizing step).

  By fixing the tip of the divided laminated tooth portion 21 facing upward and pouring the adhesive 7 along the groove M by the dispenser 8 (adhesive injection step), the adhesive 7 penetrates between the respective gaps S. Before the adhesive 7 is cured, the pressurization in the direction of the arrow I is stopped to return to the state where the gap S between the layers is eliminated (depressurization step).

  Further, before the adhesive 7 is cured, for example, the divided laminated core 2 is pressed in a state where the divided laminated core 2 is corrected by the correction jig 9 from the direction indicated by the arrow II in FIG. It is also possible to form the split laminated iron core 2 with high accuracy by curing the adhesive 7 as it is (adjusting step).

  Here, the adhesive 7 may be heat-cured using, for example, a varnish. A varnish is dripped at the groove | channel M, the viscosity of a varnish is reduced by heating in the state which stored the varnish, and it osmose | permeates in a division | segmentation laminated | stacked iron core. Further, the width and depth of the groove M having a V-shaped cross section are adjusted according to the amount of varnish dripping required for bonding. Further, an adhesive that is cured by being irradiated with UV may be used.

  When the adhesive 7 is completely cured, the insulator 5 is attached to the divided laminated core 2 (insulation process), and the coil 3 is wound (coil winding process). Insulating coating may be applied to the divided laminated core 2 without using the insulator 5. A stator 100 is obtained by assembling a split laminated iron core 2 around which a predetermined number of coils 3 are wound into an annular shape.

  According to the laminated iron core, the stator, the laminated iron core manufacturing method, and the stator manufacturing method according to Embodiment 1 of the present invention, the gap between the laminated layers of the divided laminated core 2 is provided at the tip of the divided laminated tooth portion 21. By pouring and hardening the adhesive 7 from the groove M, the picked adhesive 7 is temporarily accumulated in the groove M without overflowing, and does not protrude outside the inner peripheral side of the divided laminated tooth portion. This eliminates the need to clean the protruding adhesive 7. In addition, since a predetermined amount of the adhesive 7 can be dropped without waiting for the penetration of the adhesive 7, workability is improved. Also, by determining the width and depth of the groove M in accordance with the required amount of dripping, the dripping amount of the adhesive 7 can be easily managed, and the productivity of the laminated core can be improved.

7 and 8 are diagrams showing another example of the groove.
FIG. 4 illustrates an example in which the groove M having both ends closed is provided. However, if a highly permeable adhesive 7 is used, the groove M2 having both ends open as shown in FIG. 7A may be used. . In addition, as shown in FIG. 7B, a part of the intermediate layer may be provided with a divided groove M3 using the iron core piece 2a. The groove is not limited to a V-shaped cross section in the axial direction, and may be a dish-like groove M4 as shown in FIG.

FIG. 9 is a diagram for explaining the tightening due to the winding of the coil of the divided laminated iron core.
For example, when the adhesive 7 is not injected as shown in FIG. 9, when the coil 3 is wound, the gap S between the laminated laminated iron cores is narrowed by the tension when the coil 3 is wound. Tightening occurs.

  At this time, as shown in the drawing, the gap S on the side of the divided laminated tooth portion 21a around which the coil 3 is wound is narrowed in the laminating direction, and the accuracy of the divided laminated iron core is remarkably deteriorated. When the accuracy of the split laminated iron core is deteriorated, the workability of inserting the frame is deteriorated when the stator of the rotating electric machine is manufactured. In addition, when shrink fitting is performed, the frame is heated to a high temperature and the magnetic teeth cannot be inserted into the frame unless the frame is enlarged, and extra time and energy are required to warm the frame. On the other hand, in the configuration of the present embodiment, the rigidity of the divided laminated iron core is increased, and the adhesive 7 fills the gap S between the laminated layers, so that no winding tightening occurs. As a result, the accuracy of the split laminated iron core is improved, the assembly workability of the stator 100 is improved, and the productivity of the stator 100 is improved.

  Moreover, vibration and noise of the rotating electrical machine can be suppressed by increasing the rigidity of the laminated iron core. In addition, the back yoke portions 2ay and 2by of the iron core pieces 2a and 2b are provided with the crimping portion 6 and the teeth portions 2at and 2bt are not provided with the crimping portion, thereby pressing the back yoke portions 2ay and 2by so as to be sandwiched in the stacking direction. Thus, the adhesive 7 can be sufficiently injected in a state in which the gap S is generated between the laminations, particularly on the tip side of the divided laminated tooth portion 21. Thereby, the rigidity of the divided laminated core is further improved, and the accuracy of the laminated core can be improved and vibration noise can be suppressed.

  In addition, for example, when using an adhesive 7 such as a varnish that allows the clay to be lowered and penetrated, the adhesive 7 can be easily injected to every corner of the gap S without increasing the temperature so that the adhesion workability is improved. Product productivity is improved.

  In addition, since the adhesive 7 can be cured by correcting the shape of the split laminated iron core 2 after the adhesive 7 is injected, the accuracy of the crimped portion 6 due to wear of the die punch or the thickness of the iron core piece is reduced. Even if there is a tilt or misalignment between the laminated cores 2 due to variations, the accuracy of the divided laminated core can be improved by correcting the adhesive 7 after the injection, and the assembly workability is improved and the productivity of the stator 100 is improved. Will improve.

  Further, the crimping portion 6 that prevents the magnetic path does not exist in the divided laminated tooth portion 21, the magnetic resistance can be reduced, and the efficiency of the rotating electrical machine can be improved by reducing the iron loss. Moreover, since the magnetic saturation of the division | segmentation lamination | stacking teeth part 21 can be suppressed, the characteristic of a rotary electric machine, such as a torque increase of a rotary electric machine, can be improved.

  Note that the shape and number of the crimping portions 6 are not limited to this. FIG. 10 is a plan view of a split laminated iron core having other crimping portions 6a and 6b according to Embodiment 1 of the present invention. For example, two crimped portions 6a and 6b may be provided in the divided laminated back yoke portion 22 as shown in the figure. Further, the caulking portion 6 may not be provided.

FIG. 11A is a plan view of the divided laminated core 2 in which a welded portion 24 is provided on the outer peripheral surface of the divided laminated back yoke portion 22 to fix the gap between the laminated portions instead of the crimped portion.
FIG.11 (b) is sectional drawing in the ZZ line | wire of Fig.11 (a). In the above-described example, the laminations of the divided laminated back yoke portions 22 are connected by the crimping portion 6, but the laminations may be connected by a welding portion 24 as shown in FIG. 11. Also in the structure of the stator, the number and shape of the divided laminated tooth portions 21 are not limited to those described in the present embodiment.

Embodiment 2. FIG.
Hereinafter, the laminated iron core, the stator, the method for producing the laminated iron core, and the method for producing the stator according to the second embodiment of the present invention will be described with reference to the drawings, focusing on the differences from the first embodiment.
FIG. 12 is a perspective view of the divided laminated core 202.
FIG. 13 is a plan view of the iron core piece 202b constituting the divided laminated iron core 202. FIG. The iron core piece 202b corresponds to the iron core piece 2b in the first embodiment.
FIG. 14 is a diagram illustrating a state where the core pieces 202b are combined in a ring shape (one laminated core).

  In the present embodiment, the configuration of the adhesive reservoir M5 (corresponding to the groove M in the embodiment) is different from that in the first embodiment. As shown in FIG. 14, by configuring the radius of curvature R2 of the arc-shaped portion at the tip of the tooth portion 202bt to be smaller than the radius R1 of the circle formed by the inner periphery of the laminated core, An adhesive reservoir M5 having an arc-shaped cross section perpendicular to the stacking direction can be provided at the circumferential tip, and the same effect as in the first embodiment can be obtained. Further, similarly to the first embodiment, the core pieces 202 a at both ends of the laminate are not provided with a notch, so that a recess for storing the adhesive 7 can be formed, and the adhesive 7 is formed on the inner periphery of the split laminated core 202. It can suppress that it protrudes and spills to the side, the outer peripheral side, and the stacking direction, and the workability can be further improved.

Embodiment 3 FIG.
Hereinafter, the laminated iron core, the stator, the method for producing the laminated iron core, and the method for producing the stator according to the third embodiment of the present invention will be described with reference to the drawings, focusing on the differences from the first embodiment.
FIG. 15A is a plan view of the divided laminated core 302 according to the present embodiment.
FIG. 15B is a cross-sectional view taken along the line Z3-Z3 of the split laminated iron core 302 while the adhesive 7 is being injected.
FIG. 16 is a schematic diagram showing a state where the adhesive 7 dropped into the hole a3 penetrates into the gap S between the layers.

  As shown in FIGS. 15A and 15B, a hole a3 for injecting the adhesive 7 is provided in the vicinity of the center of the tooth portion 302ct of the iron core piece 302c constituting the part other than the lowermost layer of the divided laminated iron core 302. Further, only the lowermost core piece 302d of the laminated layer is not provided with a hole a3 so that the injected adhesive 7 does not leak. As shown in FIG. 15B, the adhesive 7 is poured in a state where the laminated direction of the divided laminated cores 302 is aligned with the vertical direction, the adhesive 7 is hung on the hole a3, and the hole a3 is formed. The adhesive 7 is dammed up with the iron core piece 302d which is not provided, and the adhesive 7 is infiltrated into the gap S between the layers.

  According to the laminated core, the stator, the laminated core manufacturing method, and the stator manufacturing method according to Embodiment 3 of the present invention, the adhesive 7 is permeated from the vicinity of the center of the divided laminated teeth portion 321 to the entire divided laminated core. And the rigidity of the split laminated iron core 302 can be improved. Further, the adhesive 7 can be injected into the gap S between the permeation laminates simply by dropping the adhesive 7 into the hole a3, and the workability at the time of manufacturing the divided laminated core 302 can be improved.

  Note that the hole a3 may be as small as the adhesive 7 can be dropped, and by configuring the hole a3 to be small, the magnetic path is not obstructed and the magnetic characteristics of the divided laminated core 302 can be improved. Further, the number of holes is not limited to one, and two or more holes may be provided side by side in the longitudinal direction of the divided laminated teeth portion 321 and the number of dropping nozzles of the dispenser 8 may be increased according to the number of holes. The adhesive 7 can be dropped into a plurality of holes at a time, and the productivity of the divided laminated core 302 is further improved.

  Further, as described above, the hole a3 is not provided in the lowermost core piece 302d, but the core piece 302c having the hole a3 is used for all the layers, and the hole a3 in the lowermost core piece is closed with a jig or the like. Then, the adhesive 7 may be dropped, and if configured in this way, the same core piece 302 c can be used for all the laminated layers 302, and the productivity of the divided laminated core 302 can be improved.

Embodiment 4 FIG.
Hereinafter, the laminated iron core, the stator, the method for producing the laminated iron core, and the method for producing the stator according to the fourth embodiment of the present invention will be described with a focus on differences from the first embodiment with reference to the drawings.
FIG. 17 is a plan view of a stator 400 in which the coil 3 is wound around the laminated core 420 according to the fourth embodiment of the present invention.
FIG. 18 is a diagram showing an adhesive injection step of dropping an adhesive for fixing the laminated layers onto the divided laminated iron core 402 of FIG.
In the first embodiment, the example in which the laminated core 20 is configured by combining the separated divided cores 2 is described. However, in the present embodiment, a plurality of divided laminated cores 402 are rotatably connected by the rotary connecting portion 25. ing.

  Similarly to the divided laminated iron core 2 of the first embodiment, the divided laminated iron core 402 used in the present embodiment is connected between the laminated laminated back yoke portions 422 by the caulking portion 6, and between the laminated laminated teeth portions 421. By injecting and curing the adhesive 7 in the gap, the same effect as in the first embodiment can be obtained.

  According to the laminated core, the stator, the laminated core manufacturing method, and the stator manufacturing method according to Embodiment 4 of the present invention, the divided laminated cores 402 can be connected and handled as a single unit, and can be transported, assembled, and the like. Thus, the assembly process can be easily automated, and the productivity of the laminated core 420 can be improved. Further, since all the divided laminated iron cores 402 are rotatably connected by the rotary connecting portion 25, the coil 3 is wound with the space between the divided laminated teeth portions 421 widened, so that the coil 3 can be manufactured with high density and high productivity. Can be wound.

  In addition, since the lamination between the laminated laminated teeth portions 421 is fixed by the adhesive 7 and has high rigidity, it is possible to prevent the accuracy of the laminated iron core 420 from deteriorating when the coil 3 is wound as in the first embodiment. The stator 400 can be easily assembled with high productivity.

  In FIG. 18, the adhesive 7 is dropped at once using a plurality of dispensers 8, but the adhesive 7 may be dropped on the divided laminated teeth portion 421 in order using one dispenser 8.

  Here, if the adhesive 7 flows into the rotary connecting portion 25 and hardens, the laminated iron core 420 cannot be successfully assembled in a later assembly process. In order to prevent this, the caulking portions 6 are provided at two locations, one in the vicinity of the rotary connecting portion 25. With this configuration, the adhesive 7 that has flowed from the side of the divided laminated teeth portion 421 in the gap between the layers is blocked by the caulking portion 6, and the adhesive 7 is prevented from entering the rotary connecting portion 25. be able to.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

100,400 stator, 2,202,302,402 split laminated iron core,
21, 21a, 321, 421 divided laminated teeth,
22, 422 split laminated back yoke part, 24 welded part, 25 rotary connecting part,
2a, 2b, 202a, 202b, 302c, 302d core pieces,
2at, 2bt, 202bt, 302ct teeth part,
2ay, 2by Back yoke part, 3 coil, 4 frame, 5 insulator,
6, 6a Caulking part, 7 Adhesive, 8 Dispenser, 9 Straightening jig,
M, M2, M3, M4 groove, S gap, 20,420 laminated iron core, a3 hole.

Claims (4)

A manufacturing method of a laminated core comprising a back yoke part and a teeth part protruding from the back yoke part, and a plurality of divided laminated cores obtained by laminating iron core pieces punched from electromagnetic steel sheets, connected in an annular shape,
An iron core piece punching step in which a notch is provided at the tip of the teeth portion and the iron core piece is punched out from the electromagnetic steel sheet;
Lamination step of laminating the core pieces and configuring the split laminated core having a groove extending in the axial direction at the tip on the inner peripheral side of the divided laminated teeth portion;
A pressurizing step of pressurizing the divided laminated back yoke part in the laminating direction from both ends in the laminating direction, which is a portion where the back yoke part is laminated;
Adhesive injection in which the adhesive is dropped into the groove of the divided laminated tooth portion with the tip of the divided laminated tooth portion facing upward while performing the pressurizing step. Process,
A depressurization step of stopping the pressurization to the divided laminated back yoke portion before the adhesive is cured;
A manufacturing method of a laminated core comprising: an assembly step of configuring the laminated core by combining the divided laminated cores in an annular shape. After the adhesive injection step, said laminated core segments, adjust the stacked state of the core pieces by pressing from the outer side and the inner circumference side, method for manufacturing a laminated core according to claim 1 having the adjustment process. 3. The method for manufacturing a laminated core according to claim 1, wherein, in the laminating step, the back yoke portions of the adjacent iron core pieces are caulked and joined. The manufacturing method of the stator provided with the coil winding process which winds a coil in the division | segmentation lamination | stacking teeth part of the said division | segmentation lamination | stacking iron core of any one of Claims 1-3 .

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