JP5039473B2 - Method and apparatus for manufacturing split laminated iron core - Google Patents

Description

The present invention relates to a method and apparatus for manufacturing a split laminated iron core used for a stator such as a motor or a generator.

Conventionally, as described in Patent Document 1, a stator used for a motor or the like is formed by manufacturing a plurality of stator core pieces of the same shape by press working from a strip material, and caulking them. A stator laminated iron core was used. This stator laminated iron core has a yoke part, a magnetic pole shaft part protruding inward of the yoke part, and a magnetic pole tooth part formed on the front side thereof, and winding is applied to each magnetic pole shaft part to provide a stator. I was trying.
However, since the coil wound around the magnetic pole shaft protrudes in the axial direction of the stator laminated iron core and surrounds the protruding coil, a magnetic pole tooth portion and a yoke portion are formed in this portion as described in Patent Document 2. It was difficult to manufacture using a stator core piece having the same shape. Therefore, for example, as described in Cited Document 3, a motor core is made of a compound material obtained by kneading a resin with a soft powder material.

JP-A-9-191588 Japanese Patent Laying-Open No. 2007-6636 (FIGS. 18 to 22) JP 2006-217702 A

However, even if a material obtained by kneading a resin with a soft powder material as described in Patent Document 3 is used as a magnetic material, the overall permeability is not improved, and as a result, the efficiency of the motor is not improved. It was. Furthermore, the strength as a core is insufficient, and it is difficult to apply to large motors and generators, and productivity is low and expensive.
Moreover, although patent document 2 is extending the both sides of a yoke part and a magnetic pole tooth part to an axial direction, since it is not a division | segmentation laminated | stacked iron core, winding of a coil is difficult, Moreover, about the specific manufacturing method in the same gazette Not disclosed.

The present invention has been made in view of such circumstances, and the conventional laminated iron core has a coil storage portion formed to project in the axial direction, and further, the yoke and magnetic pole teeth formed when assembled are pivoted. It aims at providing the manufacturing method and manufacturing apparatus of the division | segmentation laminated core which extended in the direction and improved the magnetic efficiency.

A method for manufacturing a split laminated iron core according to the first aspect of the present invention includes a split yoke portion having an arcuate outer shape in a radial direction in plan view, and a magnetic pole shaft portion connected to the inner side in the radial direction of the split yoke portion, A magnetic pole tooth portion connected to a radially inner side of the magnetic pole shaft portion, and the divided yoke portion and the magnetic pole tooth portion protrude from the magnetic pole shaft portion on both sides in the axial direction, respectively. A method of manufacturing a split laminated iron core having two yoke protrusions and first and second magnetic pole tooth protrusions,
A split yoke piece portion whose outer side in the radial direction is arc-shaped, a magnetic pole shaft piece portion connected to the inner side in the radial direction of the split yoke piece portion, and a magnetic pole tooth piece portion connected to the inner side in the radial direction of the magnetic pole shaft piece portion In the process of manufacturing the divided laminated core by caulking and dividing the divided core pieces, the first and second yoke protrusions are formed by removing the magnetic pole shaft pieces of the divided core pieces with a blade. , The second yoke protruding piece and the first and second magnetic pole tooth protruding pieces forming the first and second magnetic pole tooth protruding portions are formed separately from each other. The two yoke protruding pieces and the second magnetic pole tooth protruding piece, the divided core piece, and finally the first yoke protruding piece and the first magnetic pole tooth protruding piece are laminated by caulking.

In addition, the method for manufacturing a split laminated core according to the second aspect of the present invention includes a split yoke portion having an arcuate outer shape in the radial direction in plan view, and a magnetic pole shaft portion connected to the inner side in the radial direction of the split yoke portion. And a magnetic pole tooth portion connected to the inside in the radial direction of the magnetic pole shaft portion, and the divided yoke portion and the magnetic pole tooth portion protrude from the magnetic pole shaft portion on both sides in the axial center direction, respectively. A split laminated iron core comprising a second yoke protrusion and first and second magnetic pole tooth protrusions, and a radially outer portion of the first and second magnetic pole tooth protrusions having an inclined portion that opens outward. A manufacturing method of
A split yoke piece portion whose outer side in the radial direction is arc-shaped, a magnetic pole shaft piece portion connected to the inner side in the radial direction of the split yoke piece portion, and a magnetic pole tooth piece portion connected to the inner side in the radial direction of the magnetic pole shaft piece portion In the process of caulking and laminating the divided core pieces and manufacturing the divided laminated core, at least one of the magnetic pole shaft pieces of the divided core pieces is removed with a plurality of blades moving in the radial direction, and the first, The first and second yoke protruding pieces forming the second yoke protruding portion, and the first and second magnetic pole tooth protruding portions that are gradually different in radial direction and have the inclined portion on the radially outer side. First and second magnetic pole teeth protruding pieces to be formed are formed.

Further, in the method for manufacturing a divided laminated core according to the first and second inventions, a concave portion is provided at one circumferential end of the divided yoke portion, and a convex portion that substantially engages the concave portion at the other end portion. Is preferably provided. Thereby, when assembling divided laminated iron cores, adjacent divided laminated iron cores can be accurately connected.

In the method for manufacturing a divided laminated core according to the first and second inventions, the magnetic pole shaft portion has a cross-sectional shape of a rectangle, a rectangle with rounded corners, a circle, an ellipse, a triangle with rounded corners, or a pentagon or more. The shape may be square, but the present invention is not limited to these shapes.

In the method for manufacturing a split laminated iron core according to the first and second inventions, it is preferable that only both sides in the axial direction of the magnetic pole tooth portion including the first and second magnetic pole tooth protrusions are caulked and laminated. As a result, the caulking portion can be reduced to improve the magnetic characteristics.
In the method for manufacturing a split laminated core according to the present invention, the radially inner side of the first and second yoke projecting portions is a second inclined portion that opens outward, and the second inclined portion is at least the It can also be formed by gradually moving a third blade having an inner width perpendicular to the radial direction of the divided yoke piece.

In the method for manufacturing a split laminated iron core according to the first and second inventions, in forming the magnetic pole shaft portion, the slotted blade forming the magnetic pole shaft piece portion is defined as the center line of the magnetic pole shaft piece portion. It is preferable that the angle of the magnetic pole shaft portion is rounded by gradually moving in the orthogonal direction.
In the method for manufacturing a split laminated iron core according to the present invention, the first and second yoke protrusions and the first and second magnetic pole tooth protrusions are separated and held in a stationary state in a mold. More preferably.

According to a third aspect of the present invention, there is provided a split laminated iron core manufacturing apparatus comprising: a split yoke portion having an arcuate radial outer side in plan view; a magnetic pole shaft portion connected to the radial inner side of the split yoke portion; Magnetic pole teeth connected to the inner side in the radial direction, and the divided yoke portion and the magnetic pole teeth protrude from the magnetic pole shaft on both sides in the axial direction, respectively. A split laminated iron core manufacturing apparatus having a portion and first and second magnetic pole tooth protrusions,
With reference to the positioning pilot hole, the radially outer portion of the divided yoke piece portion is arcuate, the magnetic pole shaft piece portion is connected to the radially inner side of the divided yoke piece portion, and the radially inner side of the magnetic pole shaft piece portion. A magnetic pole shaft punching station that punches out a part or all of the magnetic pole shaft piece portion of a thin strip material made of a magnetic material in which the position of a divided core piece having a magnetic pole tooth piece portion to be formed is defined as an outline punching station. Separately, the first and second yoke protruding pieces and the first and second magnetic poles that form the first and second yoke protruding portions by operating the magnetic pole piece removing station and the outer shape extracting station. First and second magnetic pole tooth protruding pieces that form tooth protruding portions are formed.

And in the manufacturing apparatus of the divided laminated iron core according to the third invention, it is preferable that the blade is movable in the radial direction at the magnetic pole piece removing station.

The manufacturing method of the divided laminated iron core according to claim 1 and the manufacturing apparatus of the divided laminated iron core according to claims 9 and 10 extend the magnetic pole teeth part on both sides in the axial direction as apparent from the above description. Since the first and second magnetic pole tooth protrusions and the first and second yoke protrusions obtained by extending the divided yoke parts on both sides in the axial direction are formed, a groove is formed by these, and the laminated core In this case, it is possible to store the windings that have conventionally protruded on both sides in the axial direction.
Furthermore, since the whole of the divided laminated iron core is composed of iron core pieces (magnetism) formed by punching the strip material, the manufacturing becomes easier and the magnetic characteristics and strength of the iron core can be secured.

In particular, in the method for manufacturing a split laminated core according to claim 2, it is possible to manufacture a split laminated core having an inclined portion in which the radially outer portions of the first and second magnetic pole tooth protrusions open outward.
In the method for manufacturing the split laminated iron core according to claim 3, since the concave portion is provided at one end portion in the circumferential direction of the split yoke portion, and the convex portion that substantially engages the concave portion is provided at the other end portion. The assembly of the split laminated iron core is facilitated, and a stator iron core closer to a perfect circle can be obtained during assembly.

In the method for manufacturing a split laminated iron core according to claim 4, the cross-sectional shape of the magnetic pole shaft portion is a rectangle, a rectangle with rounded corners, a circle, an ellipse, a triangle with rounded corners, or a polygon that is a pentagon or more. In this case, the winding efficiency can be improved by making the cross section of the magnetic pole shaft portion into a polygon, a circle, or an ellipse with rounded corners, for example.

In the method for manufacturing a split laminated iron core according to claim 5, since only the both sides in the axial direction of the magnetic pole tooth portion including the first and second magnetic pole tooth protrusions are caulked and laminated, the first and second magnetic poles The tooth protruding portion can be fixed to the magnetic pole tooth portion, and deterioration of magnetic characteristics due to the formation of the caulking portion on the magnetic pole tooth portion can be suppressed.
In the method for manufacturing a split laminated iron core according to claim 6, the radially inner side of the first and second yoke protruding portions is a second inclined portion that opens outward, and the second inclined portion is at least Since the third blade having the inner width perpendicular to the radial direction of the yoke piece is formed by gradually moving, it is not necessary to prepare a plurality of blades according to the shape of the divided yoke piece, and the first is inexpensive. The second yoke protrusion can be formed.

Further, in the method of manufacturing a split laminated iron core according to claim 7, in forming the magnetic pole shaft portion, the slotted blade forming the magnetic pole shaft piece portion is gradually moved in a direction perpendicular to the center line of the magnetic pole shaft piece portion. By moving and rounding the corner of the magnetic pole shaft portion, the angle of the magnetic pole shaft portion is eliminated and winding becomes easy.
In the method for manufacturing a split laminated iron core according to claim 8, the first and second yoke protrusions and the first and second magnetic pole tooth protrusions are separated and held in a stationary state in the mold. Therefore, the first and second yoke protrusions and the first and second magnetic pole tooth protrusions can be reliably laminated in the mold, and finally the whole is integrated to form the divided laminated iron core. Can be manufactured.

In the manufacturing apparatus for a split laminated iron core according to claim 10, the split laminated iron core having an inclined portion in which the radially outer portions of the first and second magnetic pole tooth protrusions are opened outward by moving the blade. Is possible.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIGS. 1A and 1B are a plan view and a front view of a divided laminated core manufactured by the method for manufacturing a divided laminated core according to one embodiment of the present invention, respectively, and FIG. Explanatory drawing of the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on embodiment, FIG. 3 is a perspective view of the division | segmentation lamination | stacking iron core manufactured by the manufacturing method of the division | segmentation lamination | stacking iron core which concerns on other embodiment of this invention, FIG. (B) is explanatory drawing of the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on other embodiment of this invention, respectively, FIG. 5 is the division | segmentation manufactured by the manufacturing method of the division | segmentation lamination | stacking iron core which concerns on other embodiment of this invention. It is a front view of a laminated iron core.

With reference to FIG. 1, the manufacturing method and manufacturing apparatus of the split laminated iron core which concern on one embodiment of this invention are demonstrated. First, the split laminated iron core 10 manufactured by the manufacturing method will be described.
As shown in FIGS. 1A and 1B, the split laminated core 10 is used for a stator core of a motor, and an annular stator core is formed by twelve split laminated cores 10 respectively. A stator is formed by winding a coil around the magnetic pole shaft 11.

The divided laminated iron core 10 includes the magnetic pole shaft portion 11, the divided yoke portion 12 integrally connected to the radially outer side thereof, and the magnetic pole tooth portion 13 integrally connected to the radially inner side of the magnetic pole shaft portion 11. The first and second yoke projecting portions 14 and 15 projecting on both sides in the axial direction of the divided yoke portion 12 and the first and second magnetic pole tooth projecting portions 16 and 17 projecting on both axial sides of the magnetic pole tooth portion 13. And have. The first and second yoke protrusions 14 and 15 and the first and second magnetic pole tooth protrusions 16 and 17 have the same height in the axial direction, and the divided yoke part 12 and the magnetic pole tooth part, respectively. 13 are integrally connected. In addition, a concave portion 12a is formed at one end in the circumferential direction of the divided yoke portion 12, and a convex portion 12b is formed at the other end portion, and adjacent divided laminated cores 10 are accurately connected via the concave portion 12a and the convex portion 12b. It has come to be. In addition, these 12a and 12b shall also display the recessed part and convex part which are formed in each iron core piece.

The divided yoke portion 12, the magnetic pole shaft portion 11, and the magnetic pole tooth portion 13 are laminated with a predetermined number of divided iron core pieces 18 via caulking portions 19, and the first and second yoke protruding portions 14 and 15 each have a predetermined number of first pieces. The first and second yoke protruding pieces 20 and 21 are stacked on the divided yoke portion 12 via the caulking portion 19. In addition, the first and second magnetic pole tooth protrusions 16 and 17 are each formed by caulking and laminating a predetermined number of first and second magnetic pole tooth protrusions 22 and 23 in the axial direction by caulking parts 24. Is also provided at the end of the magnetic pole tooth portion 13 in the axial direction so as to be connected to the stacked magnetic pole tooth portions 13.

Each of the caulking portion 19 and the caulking portion 24 may be a well-known V-shaped caulking, may be half-cut caulking, may be 1 each as shown in FIG. May be. Further, a caulking portion may be provided on the magnetic pole shaft portion 11. In addition, the caulking part formed in the iron core piece at the bottom of the caulking parts 19 and 24 is a caulking hole.

In the split laminated iron core 10 according to this embodiment, the first and second magnetic pole tooth protrusions 16 and 17 protruding on both sides in the axial direction of the magnetic pole tooth portion 13 are arc-shaped on the radially inner side, Although it has the same shape as the tooth portion 13, the radially outer side is open in the protruding direction (that is, the outer direction) and has inclined portions 25 and 26. Thus, the area of the coil winding portion 27 is secured, and the flow of magnetic flux from the magnetic pole shaft portion 11 to the first and second magnetic pole tooth protrusions 16 and 17 is made smooth.

Then, the manufacturing method of this division | segmentation laminated | stacked iron core 10 is demonstrated, referring FIG.
As shown in FIG. 2, in the manufacturing method of the divided laminated core according to one embodiment of the present invention, a strip material (thin plate) made of a magnetic steel plate (magnetic material) is used using a mold apparatus having stations A to J. Finally, the core pieces are stacked in the mold of the station I from the strip material 30 to produce the divided laminated core 10. In the figure, the broken line indicates the outer shape of the divided core piece 18.

In the mold of the station I, first, the second yoke protruding piece 21 and the second magnetic pole tooth protruding piece 23 are stacked, the divided core piece 18 is stacked thereon, and finally the first yoke protruding piece 20, the first Since the magnetic pole tooth protruding pieces 22 are caulked and laminated, these core pieces are arranged on the strip 30 in the order of lamination.

Station A is a processing station for positioning pilot holes 31 and 32. The pilot holes 31 and 32 are formed in the strip 30 at a predetermined pitch, and the strip 30 is positioned at each station. The station B is a processing station for the first and second yoke protruding pieces 20 and 21 and the first and second magnetic pole tooth protruding pieces 22 and 23. When the divided core piece 18 is processed, the station B is an idle station. It becomes. In this station B, a part of the magnetic pole shaft piece portion 11a is punched out with the first blade 33 arranged in a fixed state with the same width as that of the magnetic pole shaft portion 11. Station C is an idle station.

Station D is a processing station for the first and second yoke protruding pieces 20 and 21 and the first and second magnetic pole tooth protruding pieces 22 and 23. When the divided core piece 18 is processed, Become. In this station, the second blade 34 having the same width as that of the magnetic pole shaft portion 11 is used, but the inner portion of the magnetic pole shaft portion 11, that is, the radially outer side of the first and second magnetic pole tooth protrusions 16 and 17. Since the inclined portions 25 and 26 are formed at the portions, the radial lengths of the first and second magnetic pole tooth protruding pieces 22 and 23 to be stacked are gradually different. Therefore, when the second magnetic pole tooth protruding piece 23 is formed, the second magnetic pole tooth protruding piece 22 is formed while the second blade 34 is moved from a to b. The blade 34 is moved while gradually moving from b to a.

The stations B and D described above form a magnetic pole piece extraction station, and thereby the inclined portions 25 and 26 that open outward in the radial outer portions of the first and second magnetic pole tooth protrusions 16 and 17. Is formed. Further, in the formation of the divided laminated iron core 52 (see FIG. 5) that does not have such an inclined portion, any one of the stations may be a fixed blade that pulls out only the magnetic pole piece. In this case, it is preferable to form by one process using the cutter which has the width | variety d of the magnetic pole part 11 in either one of the stations B or D.

The radial widths of the first and second blades 33 and 34 are combined to be sufficiently longer than the length of the magnetic pole shaft portion 11, and the punching holes 35 of the first and second blades 33 and 34 are always included. 36 is to wrap. The station F is a processing station for the caulking portions 19 and 24, and is divided by caulking and stacking on the second yoke protruding piece 21, the second magnetic pole tooth protruding piece 23, and the first magnetic pole tooth protruding piece 22 at the bottom. Caulking through holes 37 and 38 are formed in the lowermost iron core piece (indicated by 18a in FIG. 1) of the iron core piece 18.

The station G is a caulking portion processing station, and is a second yoke protruding piece that is caulked and laminated on an iron core piece in which the caulking through holes 37 and 38 that are components of the caulking portions 19 and 24 are formed. 21, the divided iron core piece 18 and the first yoke protruding piece 20, the second magnetic pole tooth protruding piece 23, a part of the upper and lower parts of the divided iron core piece 18, and the first magnetic pole tooth protruding piece 22. The crimped caulks 39 and 40 (other components of the caulking portions 19 and 24) are formed. Station H is an idle station.

The station I is an outer shape drawing station. First, the second yoke protruding piece 21 and the second magnetic pole tooth protruding piece 23 are removed into the mold, and then the divided core piece 18 is finally moved to the first piece. The yoke protruding piece 20 and the first magnetic pole tooth protruding piece 22 are removed, and the divided laminated iron core 10 is assembled in the mold. The first and second yoke protrusions 14 and 15 and the first and second magnetic pole tooth protrusions 16 and 17 are separated in the mold (die) and the periphery is held vertically and horizontally in the mold. Then, they are stacked in a stationary state in the mold. From station J onward, the skeleton from which these have been removed is transported.

Therefore, when the above is summarized, the radially outer portion of the divided yoke piece portion 18b having an arc shape, the magnetic pole shaft piece portion 11a connected to the radially inner side of the divided yoke piece portion 18b, and the radially inner side of the magnetic pole shaft piece portion 11a. In the process of caulking and laminating the divided iron core pieces 18 having the magnetic pole tooth pieces 13a connected to each other and manufacturing the divided laminated iron core (see I in FIG. 2), at least one of the magnetic pole shaft pieces 11a of the divided iron core pieces 18 is provided. Are removed by the first and second blades 33, 34 moving in the radial direction to form the first and second yoke protrusions 14, 15, and the first and second yoke protrusions 20, 21; First and second magnetic pole tooth projecting pieces 22 and 23 forming first and second magnetic pole tooth projecting portions 16 and 17 having gradually different radial lengths and having inclined portions 25 and 26 radially outward are provided. Form.

Then, the manufacturing method of the laminated core which concerns on other embodiment of this invention is demonstrated. The target split laminated iron core 42 is shown in FIG. 3, and gradually opens radially outward and radially outward of the first and second yoke protrusions 43 and 44 on both sides of the split yoke portion 12 in the axial direction. Inclined portions (second inclined portions) 45 and 46 are formed. As a result, the winding region can be reliably secured, and the winding can be reliably prevented from protruding from both axial sides of the divided laminated core 42.

In the production of the divided laminated core 42, in the station B shown in FIG. 2, instead of the first blade 33, as shown in FIG. 4A, the radial direction of the divided yoke piece 18b of the divided laminated core 42 is shown. The first and second yoke projecting pieces forming the first and second yoke projecting portions 43 and 44 are processed using a cutter (third cutter) 48 having the same or longer width as the inner width orthogonal to the inner width. In doing so, punching is performed while gradually moving the blade 48 in the cd direction perpendicular to the length direction of the strip 30. As a result, second and first yoke protruding pieces having different widths in the radial direction are formed. The other components are the same as those of the divided laminated iron core 10.

Further, as shown in FIG. 4B, in the station I of FIG. 2, the slotted blades 49 and 50 that form both sides of the magnetic pole piece 11a are separately prepared, and the upper layer side and the lower layer side of the divided laminated iron core 10 are prepared. In the formation of the magnetic pole shaft piece portion 11a of the divided iron core piece 18 positioned at the position, the slotted blades 49, 50 are gradually moved in a direction perpendicular to the center line of the magnetic pole shaft piece portion 11a, thereby By changing the width of the portion 11a, the corner of the magnetic pole shaft portion can be rounded.
The present invention is not limited to the above-described embodiments, and improvements and changes can be made without changing the gist of the present invention. For example, in the above embodiment, the shape of each component was specified and described, but the angle and size can be changed and used according to the application. In addition, the cross-sectional shape of the magnetic pole shaft portion is a rectangle or a rectangle with rounded corners in the above embodiment, but may be a circle, an ellipse, a triangle with rounded corners, or a polygon that is a pentagon or more. .

(A), (B) is the top view and front view of a division | segmentation laminated core which were manufactured by the manufacturing method of the division | segmentation lamination | stacking iron core which concerns on one embodiment of this invention, respectively. It is explanatory drawing of the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on one embodiment of this invention. It is a perspective view of the division | segmentation laminated | stacked iron core manufactured by the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on other embodiment of this invention. (A), (B) is explanatory drawing of the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on other embodiment of this invention, respectively. It is a front view of the division | segmentation laminated | stacked iron core manufactured by the manufacturing method of the division | segmentation laminated | stacked iron core which concerns on other embodiment of this invention.

10: divided laminated iron core, 11: magnetic pole shaft portion, 11a: magnetic pole shaft piece portion, 12: divided yoke portion, 12a: concave portion, 12b: convex portion, 13: magnetic pole tooth portion, 13a: magnetic pole tooth piece portion, 14: first 1 yoke protrusion, 15: second yoke protrusion, 16: first magnetic pole tooth protrusion, 17: second magnetic pole tooth protrusion, 18, 18a: divided iron core piece, 18b: divided yoke piece part, 19: caulking portion, 20: first yoke protruding piece, 21: second yoke protruding piece, 22: first magnetic pole tooth protruding piece, 23: second magnetic pole tooth protruding piece, 24: caulking portion, 25, 26: Inclined portion, 27: Winding portion, 30: Strip material, 31, 32: Pilot hole, 33: First blade, 34: Second blade, 35, 36: Punching hole, 37, 38: Caulking through Holes, 39, 40: V-shaped caulking or half-crimping, 42: Divided laminated iron core, 43: First yoke Out portion, 44: second yoke projecting portion, 45, 46: inclined part, 48: blade, 49, 50: slot punching tool, 52: laminated core segment

Claims (10)

A divided yoke portion having an arcuate outer side in a plan view, a magnetic pole shaft portion connected to the inner side in the radial direction of the divided yoke portion, and a magnetic pole tooth portion connected to the inner side in the radial direction of the magnetic pole shaft portion. The split yoke portion and the magnetic pole tooth portion protrude from the magnetic pole shaft portion on both sides in the axial center direction to form first and second yoke protrusion portions and first and second magnetic pole tooth protrusion portions. A method for manufacturing a split laminated iron core, comprising:
A split yoke piece portion whose outer side in the radial direction is arc-shaped, a magnetic pole shaft piece portion connected to the inner side in the radial direction of the split yoke piece portion, and a magnetic pole tooth piece portion connected to the inner side in the radial direction of the magnetic pole shaft piece portion In the process of manufacturing the divided laminated core by caulking and dividing the divided core pieces, the first and second yoke protrusions are formed by removing the magnetic pole shaft pieces of the divided core pieces with a blade. , The second yoke protruding piece and the first and second magnetic pole tooth protruding pieces forming the first and second magnetic pole tooth protruding portions are formed separately from each other. Two yoke projecting pieces and the second magnetic pole tooth projecting piece, then the divided iron core piece, and finally the first yoke projecting piece and the first magnetic pole tooth projecting piece. A method for manufacturing a split laminated iron core. A divided yoke portion having an arcuate outer side in a plan view, a magnetic pole shaft portion connected to the inner side in the radial direction of the divided yoke portion, and a magnetic pole tooth portion connected to the inner side in the radial direction of the magnetic pole shaft portion. The split yoke portion and the magnetic pole tooth portion protrude from the magnetic pole shaft portion on both sides in the axial center direction to form first and second yoke protrusion portions and first and second magnetic pole tooth protrusion portions. A radially outer portion of each of the first and second magnetic pole tooth protrusions is a method of manufacturing a split laminated iron core having an inclined portion that opens outward,
A split yoke piece portion whose outer side in the radial direction is arc-shaped, a magnetic pole shaft piece portion connected to the inner side in the radial direction of the split yoke piece portion, and a magnetic pole tooth piece portion connected to the inner side in the radial direction of the magnetic pole shaft piece portion In the process of caulking and laminating the divided core pieces and manufacturing the divided laminated core, at least one of the magnetic pole shaft pieces of the divided core pieces is removed with a plurality of blades moving in the radial direction, and the first, The first and second yoke protruding pieces forming the second yoke protruding portion, and the first and second magnetic pole tooth protruding portions that are gradually different in radial direction and have the inclined portion on the radially outer side. A method for manufacturing a split laminated iron core, comprising forming first and second magnetic pole tooth protruding pieces to be formed. The method of manufacturing a laminated core segments according to claim 1 or 2, wherein the recess in the circumferential direction end portions of the divided yoke portion, the other end portion projecting portion is provided for substantially engaging said recess A method for producing a split laminated iron core, comprising: The method for manufacturing a split laminated core according to any one of claims 1 to 3, wherein the cross-sectional shape of the magnetic pole shaft portion is a rectangle, a rectangle with rounded corners, a circle, an ellipse, a triangle with rounded corners, or A method for manufacturing a split laminated iron core, wherein the polygonal core is a pentagon or more polygon. 5. The method for manufacturing a split laminated core according to claim 1, wherein only both sides in the axial direction of the magnetic pole tooth portion including the first and second magnetic pole tooth protrusions are caulked and laminated. The manufacturing method of the division | segmentation laminated iron core characterized by the above-mentioned. In the method for manufacturing a split laminated core according to any one of claims 1 to 5, the radially inner side of the first and second yoke protrusions is a second inclined portion that opens outward, The method of manufacturing a split laminated iron core, wherein the second inclined portion is formed by gradually moving at least a third blade having an inner width perpendicular to the radial direction of the split yoke piece. In the method for manufacturing a split laminated core according to any one of claims 1 to 6, in the formation of the magnetic pole shaft portion, a slotted cutting tool for forming the magnetic pole shaft piece portion is formed on the magnetic pole shaft piece portion. A method for manufacturing a split laminated iron core, characterized in that the magnetic pole shaft portion is rounded by gradually moving in a direction perpendicular to the center line. The method for manufacturing a split laminated core according to any one of claims 1 to 7, wherein the first and second yoke protrusions and the first and second magnetic pole tooth protrusions are formed in a mold. A method for manufacturing a split laminated iron core, wherein the core is separated and held in an immobile state. A divided yoke portion having an arcuate outer side in a plan view, a magnetic pole shaft portion connected to the inner side in the radial direction of the divided yoke portion, and a magnetic pole tooth portion connected to the inner side in the radial direction of the magnetic pole shaft portion. The split yoke portion and the magnetic pole tooth portion protrude from the magnetic pole shaft portion on both sides in the axial center direction to form first and second yoke protrusion portions and first and second magnetic pole tooth protrusion portions. An apparatus for manufacturing a split laminated iron core having
With reference to the positioning pilot hole, the radially outer portion of the divided yoke piece portion is arcuate, the magnetic pole shaft piece portion is connected to the radially inner side of the divided yoke piece portion, and the radially inner side of the magnetic pole shaft piece portion. A magnetic pole shaft punching station that punches out a part or all of the magnetic pole shaft piece portion of a thin strip material made of a magnetic material in which the position of a divided core piece having a magnetic pole tooth piece portion to be formed is defined as an outline punching station. Separately, the first and second yoke projecting pieces that form the first and second yoke projecting portions by operating the magnetic pole piece removing station and the outer shape removing station, and the first and second An apparatus for manufacturing a split laminated iron core, characterized in that first and second magnetic pole tooth protruding pieces that form magnetic pole tooth protruding portions are formed. 10. The apparatus for manufacturing a split laminated core according to claim 9, wherein the blade is movable in the radial direction at the magnetic pole piece cutting station.

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