JP5591186B2 - Manufacturing method of laminated fixed iron core - Google Patents

Description

  The present invention relates to a method for manufacturing a core of a rotating electrical machine in which stator cores having different diameters and total number of slots are formed with the same progressive die and the same press machine, and particularly for a rotating electrical machine with excellent productivity. The present invention relates to a method for manufacturing a laminated fixed iron core.

Conventionally, in a laminated fixed core that is a kind of stator core used in a rotating electric machine, a split core piece used for a stator disposed on the outer periphery of the rotor has a shape in which a back yoke portion of the core is divided into a predetermined number. In addition, there is known a structure in which divided cores formed by laminating the divided core pieces are combined to form a laminated fixed core.
The divided core pieces are punched out by a press die in a state of being arranged in a predetermined shape from the electromagnetic steel plate member, and the divided divided core pieces are laminated to form a divided laminated core.
Here, the division angle θ of the back yoke portion of the divided core piece as viewed from the center of the stator core is 360 / N degrees when the laminated stator core is composed of n divided laminated cores.
In addition, in order to increase the roundness of the stator, there is a case where the angle formed by the end face of the back yoke portion is different from the angle obtained by dividing 360 degrees by the number of stator cores (for example, Patent Document 1).

JP 2009-44803 (Section 9, FIG. 3)

  In the conventional technology, when manufacturing two types of laminated fixed cores having different numbers of slots, that is, laminated fixed cores having different split angles θ of the back yoke portion, facilities such as a die and a press machine are required respectively. In addition, there was a problem that the equipment management cost was high. The present invention has been made in order to solve the above-described problems, and can suppress the processing cost at the time of manufacturing, can realize the space saving of the equipment, and can be stacked and fixed in a rotating electric machine excellent in productivity. It aims at providing the manufacturing method of an iron core.

The method for manufacturing a laminated fixed iron core according to the present invention includes:
In a manufacturing method of a laminated fixed core constituted by combining a plurality of divided laminated cores formed by punching a divided iron core piece constituted by a back yoke and magnetic pole teeth from an electromagnetic steel sheet and laminating divided iron core pieces,
Change only the mold that forms the end of the adjacent back yoke,
A plurality of types of divided laminated cores are manufactured by using a common mold for forming the portions other than the end portions of the divided core pieces.

The method for manufacturing a laminated fixed iron core according to the present invention includes:
Change only the mold that forms the end of the adjacent back yoke,
Since it has a core member manufacturing process for manufacturing a plurality of types of split laminated cores using a common mold for forming other than the ends of the split core pieces,
It is possible to reduce the processing cost and facility management cost of the laminated fixed core of the rotating electrical machine.
In addition, since the laminated fixed iron cores having different numbers of slots can be formed with the same mold and the same press, it is possible to save the space of the equipment.

It is a perspective view of the lamination | stacking fixed iron core which concerns on Embodiment 1 of this invention. It is a front view of the split core piece which comprises the split laminated core which concerns on Embodiment 1 of this invention. It is a top view of the two lamination | stacking fixed iron cores which concern on Embodiment 1 of this invention. It is a top view of the division | segmentation iron core piece which comprises the two iron cores which concern on Embodiment 1 of this invention. It is a figure which shows the division | segmentation iron core piece manufacturing process which concerns on Embodiment 1 of this invention. It is a top view of the two laminated fixed iron cores which concern on Embodiment 2 of this invention. It is a top view of the division | segmentation iron core piece which comprises the two iron cores which concern on Embodiment 2 of this invention. It is a top view of two lamination | stacking fixed iron cores which concern on Embodiment 3 of this invention. It is a top view of the division | segmentation iron core piece which comprises the two iron cores which concern on Embodiment 3 of this invention. It is a top view of the two laminated fixed iron cores which concern on Embodiment 4 of this invention. It is a principal part top view of the 1st iron core member which comprises the two iron cores which concern on Embodiment 4 of this invention. It is a principal part top view of the 2nd iron core member which comprises the two iron cores which concern on Embodiment 4 of this invention. It is a principal part enlarged plan view of the 1st iron core member and 2nd iron core member which comprise the two iron cores concerning Embodiment 4 of this invention. It is a figure which shows the manufacturing process of the iron core member which concerns on Embodiment 4 of this invention. It is a figure which shows the range punched with each separate metal mold | die at the time of formation of the back yoke edge part of the iron core member which concerns on Embodiment 4 of this invention. It is a figure which shows the iron core member manufacturing process which concerns on Embodiment 4 of this invention. It is a top view of two lamination iron core members concerning Embodiment 4 of the present invention. It is a top view of the two lamination | stacking fixed iron cores which concern on Embodiment 5 of this invention. It is a principal part top view of the 1st iron core member which comprises the two iron cores which concern on Embodiment 5 of this invention. It is a principal part top view of the 2nd iron core member which comprises the two iron cores which concern on Embodiment 5 of this invention. It is a figure which shows the manufacturing process of the iron core member which concerns on Embodiment 5 of this invention. It is a top view of two laminated iron core members concerning Embodiment 5 of the present invention.

Embodiment 1 FIG.
Hereinafter, a method for manufacturing laminated fixed iron cores 100a and 100b according to Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a laminated fixed iron core 100a.
The laminated fixed iron core 100a is configured by combining 15 divided laminated iron cores 10a in an annular shape.
FIG. 2 is a front view of the divided core piece 20a that constitutes the divided laminated core 10a.
The split core pieces 20a of the laminated fixed core 100a in the present embodiment are constituted by a back yoke 21a and magnetic pole teeth 22.
When the divided iron cores 10a are formed by laminating the divided iron core pieces 20a, and the divided laminated iron cores 10a are arranged in an N (15 in this example) annular shape to form the laminated fixed iron core 100a, the divided iron core pieces 20a are formed. The total number of grooves (hereinafter referred to as slots 3) between the adjacent magnetic pole teeth 22 is also N.
At this time, the angle θ1 formed by the first end surface 23a and the second end surface 24a of the back yoke 21a is represented by 360 / N degrees (24 degrees in this example).
Hereinafter, in the process of manufacturing a laminated fixed iron core having the same diameter as the laminated fixed iron core 100a and having a different number of divided laminated iron cores constituting the laminated fixed iron core, the mold of the laminated fixed iron core 100a is used. A method for manufacturing the laminated fixed iron core will be described.

FIG. 3A is a plan view of a laminated fixed iron core 100a (hereinafter referred to as the first iron core 100a or simply the iron core 100a).
FIG. 3B is a plan view of the laminated fixed iron core 100b (hereinafter referred to as the second iron core 100b or simply the iron core 100b).
Fig.4 (a) is a top view of the division | segmentation iron core piece 20a which comprises the iron core 100a.
FIG.4 (b) is a top view of the division | segmentation iron core piece 20b which comprises the iron core 100b.

The number of divided laminated cores 10a constituting the iron core 100a is fifteen, and the number of divided laminated iron cores 10b constituting the iron core 100b is twelve.
That is, the angle θ1 formed by the first end surface 23a and the second end surface 24a of the divided core piece 20a is 24 degrees, and the angle θ2 formed by the first end surface 23b and the second end surface 24b of the divided core piece 20b is 30. Degree.
At this time, the angle formed by the end surface 23a of the back yoke 21a of the split core 20a and the inner surface of the back yoke 21a on the side of the magnetic teeth 22 and the end surface 24a of the back yoke 21b of the split core piece 20b and the magnetic teeth of the back yoke 21b. The angle is different from the angle formed by the inner surface on the 22 side.

Next, the manufacturing method of the 1st iron core 100a and the 2nd iron core 100b is demonstrated.
FIG. 5 is a plan view showing an iron core member manufacturing process in which the divided iron core pieces 20a and 20b constituting the iron cores 100a and 100b are formed by stamping from a magnetic steel sheet with a press.

First, at a position indicated by an arrow S1 in FIG. 5, a punched caulking portion 4 provided as a connecting means in the stacking direction of the divided core pieces 20a and 20b is formed.
Next, at the position indicated by the arrow S2, a through-hole 5 that can be fitted to the punched caulking portion 4 is formed.
The formation of the punched caulking portion 4 and the through hole 5 is selectively used depending on the positional relationship in which the divided core pieces 20a and 20b are stacked.
Only the step S2 is performed on the divided core pieces 20a and 20b used for the uppermost layer of the stack, and the step S1 is performed on the divided core pieces 20a and 20b used for the other layers.

Next, a portion indicated by hatching in the drawing is punched out by a press at a position indicated by an arrow S3.
At this time, the mold is properly used depending on whether the split core piece 20a for the core 100a is manufactured or the split core piece 20b is manufactured.
When manufacturing the split core pieces 20a, a mold for punching out the portions indicated by hatching 6a, 7a is used. When manufacturing the split core pieces 20b, a die for punching out the portions indicated by hatching 6b, 7b is used.
By this step, both end surfaces of the back yoke of the split core piece 20a or the split core piece 20b are formed.
Both end surfaces in the case of manufacturing the split iron core 20a are portions of the end surfaces 23a and 24a in FIG. 5, and both end surfaces in the case of manufacturing the split iron core 20b are portions of the end surfaces 23b and 24b.

Next, a portion indicated by hatching 9 is punched out by a press at a position indicated by an arrow S4.
At this time, the same mold is used both when the split core piece 20a is manufactured and when the split core piece 20b is manufactured.
Since the core 100a and the core 100b have the same diameter, the curvature of the outer periphery and the inner periphery of the divided core pieces is the same.
Also, the shape of the magnetic teeth may be the same, and both end faces of the back yoke have already been processed in the previous step S3, so that the same mold can be shared.

  Thus, in the manufacturing process of the split core pieces 20a for the iron core 100a and the split core pieces 20b for the iron core 100b, all can be manufactured with the same mold except for the punching process by the press indicated by the arrow S3.

  According to the present embodiment, the other parts can share the same mold only by using different molds for punching both end surfaces of the back yoke of the divided core piece 20a and the divided core piece 20b. It is possible to reduce the capital investment cost and the equipment management cost required for manufacturing the laminated fixed core having the total number of different slots.

Moreover, since the metal mold | die which manufactures a multiple types of division | segmentation iron core piece can be shared, the space saving of an installation is attained.
In the present embodiment, the total number of slots is 15 and 12 split laminated iron cores have been described, but it goes without saying that the same effect can be obtained with other numbers of slots.
Further, in the present embodiment, two types of split core pieces have been described, but it goes without saying that the same effect can be obtained for the manufacture of split laminated cores having two or more different numbers of slots.

Embodiment 2. FIG.
Hereinafter, a method for manufacturing laminated fixed cores 200a and 200b according to Embodiment 2 of the present invention will be described with reference to the drawings.
In this embodiment, in the process of manufacturing the laminated fixed core 200b having the same number of slots (15) as the laminated fixed core 200a and having a larger diameter than the laminated fixed core 200a, the laminated fixed core 200b is manufactured. A method of manufacturing the laminated fixed core 200b that can use the mold of the core 200a will be described.

FIG. 6A is a plan view of a laminated fixed iron core 200a (hereinafter referred to as the first iron core 200a or simply the iron core 200a).
FIG. 6B is a plan view of a laminated fixed iron core 200b (hereinafter referred to as the second iron core 200b or simply the iron core 200b).

Fig.7 (a) is a top view of the division | segmentation iron core piece 220a which comprises the iron core 200a.
FIG.7 (b) is a top view of the division | segmentation iron core piece 220b which comprises the iron core 200b.
The angle θ1 formed between the first end surface 223a and the second end surface 224a of the divided core piece 220a that constitutes the iron core 200a is 24 degrees, and the first end surface 223b and the second end surface 223b of the divided core piece 220b that constitutes the iron core 200b. The angle θ2 formed by the end face 224b is also 24 degrees, and the number of the divided laminated cores 210a and 210b constituting the cores 200a and 200b is fifteen.
And the diameter of the iron core 200b is larger than the diameter of the iron core 200a.
Here, the centers of the laminated fixed iron cores are 19a and 19b.

The manufacturing method of iron core 200b in the present embodiment is the same as that in Embodiment 1 except that the shape of the portion indicated by hatching is different from that in Embodiment 1 at the position of arrow S3 in FIG.
In general, when the diameters of two iron cores are different, the curvatures of the outer circumferences of the back yokes of the divided core pieces constituting the respective iron cores are different, and the curvatures of the inner circumferences of the magnetic teeth are also different.
However, if a balance between the rotor inserted into the inner peripheral surface of the teeth and the gap between the teeth can be balanced as a whole, even if there is a slight difference in curvature, it is often negligible.
As shown in FIGS. 6A and 6B, there is a merit that a member having the same tooth shape can be selectively used in accordance with the usage of the rotating electrical machine.

According to the present embodiment, only the mold for punching the both end faces of the back yoke of the split core piece is switched, and the other part molds are shared so that the total number of slots is the same and the cores have different diameters. The split core pieces 220a and 220b for 200a and 200b can be formed in a progressive die.
In the present embodiment, as an example, the total number of slots is 15 for the iron cores 200a and 200b. However, it goes without saying that the same effect can be obtained with other numbers of slots.

Embodiment 3 FIG.
Hereinafter, a method for manufacturing laminated fixed iron cores 300a and 300b according to Embodiment 3 of the present invention will be described with reference to the drawings.
FIG. 8A is a plan view of a laminated fixed iron core 300a (hereinafter referred to as the first iron core 300a or simply the iron core 300a).
FIG. 8B is a plan view of the laminated fixed iron core 300b (hereinafter referred to as the second iron core 300b or simply the iron core 300b).

Fig.9 (a) is a top view of the division | segmentation iron core piece 320a which comprises the iron core 300a.
FIG.9 (b) is a top view of the division | segmentation iron core piece 320b which comprises the iron core 300b.
The angle θ1 formed between the first end surface 323a and the second end surface 324a of the divided core piece 320a constituting the iron core 300a is 24 degrees, and the first end surface 323b and the second end surface 323b of the divided core piece 320b constituting the iron core 300b are formed. The angle θ2 formed by the end face 324b is 30 degrees.
The number of divided laminated cores 310a constituting the iron core 300a (same as the number of slots) is fifteen, and the number of divided laminated iron cores 310b constituting the 300b is twelve.
As shown in FIG. 8, the diameter of the iron core 300b is larger than the diameter of the iron core 300a.
Here, the centers of the respective iron cores 300a and 300b are 19a and 19b.

In the present embodiment, a method of manufacturing a plurality of types of laminated fixed iron cores having different numbers of slots and different diameters using a common progressive die will be described.
The manufacturing method of the iron core in the present embodiment is the same as that in the first embodiment except that the shape of the hatched portion is different from that in the first embodiment at the position of the arrow S3 in FIG.
In general, when the diameters of two cores are different and the number of split laminated cores that make up a laminated fixed core is also different, the curvature of the outer periphery of the back yoke of each of the divided core pieces that make up each core is different, and the curvature of the inner circumference of the teeth Is also different.

However, if a balance between the rotor inserted into the inner peripheral surface of the teeth and the gap between the teeth can be balanced as a whole, even if there is a slight difference in curvature, it is often negligible.
As shown in FIG. 8A and FIG. 8B, there is an advantage that members having the same tooth shape can be selectively used according to the application of the rotating electrical machine.

According to the present embodiment, the total number of slots is different and the diameters are different by switching only the dies for punching both sides of the back yokes of the divided core pieces 320a and 320b and sharing the dies of other portions. The split cores 320a and 320b for the iron cores 300a and 300b can be formed in a progressive die.
In the present embodiment, the total number of slots is 15 and the iron cores 300a and 300b are described as an example, but it goes without saying that the same effect can be obtained with other numbers of slots.

Embodiment 4 FIG.
Hereinafter, a method for manufacturing laminated fixed cores 400a and 400b according to Embodiment 4 of the present invention will be described with reference to the drawings.
FIG. 10A is a plan view of a laminated fixed iron core 400a (hereinafter referred to as the first iron core 400a or simply the iron core 400a).
FIG. 10B is a plan view of a laminated fixed iron core 400b (hereinafter referred to as the second iron core 400b or simply the iron core 400b).

Fig.11 (a) is a top view of the 1st iron core member 430a which comprises the iron core 400a.
FIG.11 (b) is a top view of the 1st iron core member 430b which comprises the iron core 400b.
Fig.12 (a) is a top view of the 2nd iron core member 430c which comprises the iron core 400a.
FIG. 12B is a plan view of the second iron core member 430d constituting the iron core 400b.
In this embodiment, as an example, a method of manufacturing two types of iron cores 400a and 400b having a total number N of 30 and 24 iron cores having different diameters with a common progressive die will be described.

As shown in FIG. 11, the linear first iron core member 430 a is formed by arranging a plurality of plate-like first divided iron core pieces 420 a made of a magnetic material from which the magnetic pole teeth 422 protrude. ing. Although not shown, the outer peripheral portions of the adjacent divided core pieces 420a are thin and connected to each other.
The linear first iron core member 430b is formed by arranging a plurality of plate-like first divided iron core pieces 420b made of a magnetic material from which the magnetic pole teeth 422 protrude. Although not shown, the outer peripheral portions of the adjacent divided core pieces 420b are thin and connected to each other.

The divided core pieces 420a and 420b are provided with first end faces 423a and 423b in the longitudinal direction of the back yoke, and second end faces 424a and 424b on the other end side in the longitudinal direction.
In addition, each of the split core pieces 420a and 420b is provided with a punching portion 404 as a connecting means in the stacking direction.

On the end surface 423a of each of the divided core pieces 420a constituting the iron core member 430a, projecting portions 15a formed in an arc shape so as to be continuous therewith are provided at corners of the outer periphery of the back yoke.
An extension line passing through the center 16a of the projecting portion 15a and the end portion 14a on the inner peripheral side of the end face 423a, the adjacent center 16a of the adjacent divided core piece 420a, and the other end portion 13a of the previous divided core piece 420a. The intersection of the connecting extension lines becomes the center 19a of the iron core 400a.
Similarly, the end surface 423b of the first divided core piece 420b constituting the second core member 430b is provided with a protruding portion 15b formed in an arc shape so as to be continuous with the end surface 423b at the corner of the outer periphery of the back yoke. ing.

An extension line passing through the center 16b of the projecting portion 15b and the end portion 14b on the inner peripheral side of the end face 423b, an adjacent center 16b of the adjacent divided core piece 420b, and the other end portion 13b of the previous divided core piece 420b. The intersection of the connecting extension lines becomes the center 19b of the iron core 400b.
In the example shown in FIGS. 10 and 11, the angles θ1 and θ2 formed by the extension lines are 12 degrees and 15 degrees, respectively.
At this time, the angles formed by the end surfaces of the adjacent yoke portions are the same as θ1 and θ2, so the angle formed by the end surface 424a of the split core piece 420a and the inner surface of the back yoke 421a on the magnetic pole teeth 422 side is divided. The size of the angle formed by the end surface 424b of the core piece 420b and the inner surface of the back yoke 421b on the magnetic pole teeth 422 side is different.

The core member 430c shown in FIG. 12 is a member that forms the core 400a by alternately stacking with the core member 430a.
The difference between the iron core member 430a and the iron core member 430c is that the shape of the back yoke is reversed, except for the caulking portion 404.
By alternately laminating and fixing the iron core member 430a and the iron core member 430c, the end portions of the adjacent back yokes are alternately overlapped with each other so that the connecting portions can be shared with each other.
Similarly, the iron core member 430d is a member that forms the iron core 400b by alternately stacking and fixing with the iron core member 430b.

  The other configurations of the iron core members 430c and 430d are basically the same as those of the iron core members 430a and 430b, and therefore will be omitted.

FIG. 13A is an enlarged view of a main part between two adjacent divided core pieces 420a constituting the core member 430a.
FIG. 13C is an enlarged view of the main part between two adjacent divided core pieces 420c constituting the core member 430c.
The iron core 400a is formed by alternately laminating these two iron core members 430a and 430c.

FIG. 13B is an enlarged view of a main part between two adjacent divided core pieces 420b constituting the core member 430b.
FIG. 13D is an enlarged view of a main part between two adjacent divided core pieces 420d constituting the core member 430d.
The iron core 400b is configured by alternately laminating these two iron core members 430b and 430d.
The difference between the iron core member 430a and the iron core member 430b is the shape of the gaps 425a and 425b provided between the back yokes of the adjacent divided iron core pieces and the both ends of the back yoke sandwiching the gaps 425a and 425b.
Further, the difference between the iron core member 430c and the iron core member 430d is the shape of the gaps 425c and 425d provided between the back yokes of the adjacent divided iron core pieces and the both ends of the back yoke sandwiching the gaps 425c and 425d. .
The other iron core members have the same size and shape.

Therefore, in the manufacturing process of the core members 430a and 430b, if the mold used for punching the gaps 425a and 425b is replaced, the end of the back yoke of the split core pieces 420a and 420b of the respective core members 430a and 430b The part shape is also determined.
The mold used for forming other than the part can be shared.
Similarly, in the manufacturing process of the iron core members 430c and 430d, if the die used for punching the gaps 425c and 425d is replaced, the back yokes of the divided iron core pieces 420c and 420d of the iron core members 430c and 430d are replaced. The end shape is also determined.
The mold used for forming other than the part can be shared.

Next, the manufacturing method of the iron core 400a in this Embodiment is demonstrated using FIG.
FIG. 14 is a plan view showing a process of punching and forming the iron core members 430a and 430c of the iron core 400a.

First, at the position indicated by the arrow S1, the crimping portion 404 of the iron core members 430a and 430c is formed.
Next, at the position indicated by the arrow S2, the core member 430a formed at the stage of the arrow S1 and the through hole 405 that can be fitted to the punched portion 404 of the core member 430c are formed.
The process of S1 and S2 is properly used according to the lamination position of the core member to be manufactured.
The metal mold | die used at these processes uses the same metal mold | die also in the manufacturing method of the iron core member 430b mentioned later.

Next, the end portions of the two adjacent back yokes are formed by punching out hatched portions at the positions of arrows S3 and S4.
In these two processes, the mold is properly used depending on the iron core member to be manufactured.
That is, when manufacturing the iron core member 430a, only S3 process is implemented, and when manufacturing the iron core member 430c, only S4 process is implemented.

Next, a portion indicated by hatching 409 in the arrow S5 in FIG. 14 is punched out with a press.
The mold used at this time can be the same for any iron core member produced in any iron core.
This is because, in any iron core member, the shape of the teeth and the shape of the outer periphery of the back yoke may be the same.

When the iron core member 430a and the iron core member 430c are alternately manufactured in this manner and stacked while being alternately formed, a laminated core member 440a shown in FIG. 17A is formed.
Since the number of teeth of the laminated core member 440a is six, when the five laminated core members 440a are arranged in an annular shape, the iron core 400a is completed.

Next, steps S3 and S4 when manufacturing the iron core 400b will be described.
FIG. 15A shows a range of punching with a mold used for the step S3 in FIG. 14 in order to manufacture the iron core member 430a already described.
FIG.15 (c) has shown the range punched with the metal mold | die used for FIG. 14, S4 process in order to manufacture the already demonstrated iron core member 430c.
FIG. 15B shows a range of punching with a mold used for manufacturing the iron core member 430b.
FIG. 15D shows a range of punching with a mold used to manufacture the iron core member 430d.

As shown in the figure, when manufacturing the iron core 400b, two types of molds that can be punched widely between the back yokes are used in the steps S3 and S4.
FIG. 16 is a plan view showing an iron core member manufacturing process in which the iron core member 430b and the iron core member 430d of the iron core 400b are formed by stamping.
Details of each step are the same as the case where the iron core members 430a and 430c of the iron core 400a are manufactured, and thus the description thereof is omitted.

When the iron core member 430b and the iron core member 430d are manufactured alternately and are laminated while being alternately formed, a laminated iron core member 440b shown in FIG. 17B is formed.
Since the number of teeth of the laminated core member 440b is six, the core 400b is completed when four of these are arranged in an annular shape.

According to the method for manufacturing a laminated fixed iron core according to the fourth embodiment, in addition to the effects of the first embodiment, the gold used in the step of forming the end portion of the adjacent back yoke in accordance with the iron core member to be manufactured. Different types of iron core members can be manufactured by using only the molds and using the same mold in other processes.
Moreover, since a some division | segmentation iron core piece can be manufactured at once, a lamination | stacking fixed iron core can be manufactured efficiently.
In the present embodiment, as an example, the total number of slots is 30 and 24 split laminated iron cores have been described, but it goes without saying that the same effect can be obtained even with other numbers of slots.
In addition, although two types of divided laminated cores have been described, it goes without saying that the same effect can be obtained with divided laminated cores having three or more different numbers of slots.
Further, in the present embodiment, an example is shown in which adjacent back yokes are connected with a thin wall, but they may be separated.

Embodiment 5 FIG.
Hereinafter, a method for manufacturing laminated fixed iron cores 500a and 500b according to Embodiment 5 of the present invention will be described with reference to the drawings.
FIG. 18A is a plan view of a laminated fixed iron core 500a (hereinafter referred to as the first iron core 500a or simply the iron core 500a).
FIG. 18B is a plan view of a laminated fixed iron core 500b (hereinafter referred to as the second iron core 500b or simply the iron core 500b).

FIG. 19A is a plan view of the first iron core member 530a constituting the iron core 500a.
FIG. 19B is a plan view of the first iron core member 530b constituting the iron core 500b.
FIG. 20A is a plan view of the second iron core member 530c constituting the iron core 500a.
FIG. 20B is a plan view of the second iron core member 530d constituting the iron core 500b.
FIG. 21 is a plan view showing a process of punching and forming the iron core members 530a and 530c of the iron core 500a.
FIG. 22 is a plan view of the laminated core members 540a and 540b.
In the present embodiment, as an example, a method for manufacturing two types of iron cores 500a and 500b having a total number N of 30 and 24 iron cores having different diameters with a common progressive die is described. The difference from 4 will be mainly described.

The difference between the present embodiment and the fourth embodiment is the shape of the connecting portion between the divided core pieces constituting the core member.
In the fourth embodiment, the thin connection portion is left. However, in the present embodiment, at the time of manufacturing the iron core members 530b and 530d, each of the steps S1 and S2 is formed at the same time as the formation of the caulking portion 504. A concave portion 17 and a convex portion 18 for connecting adjacent iron cores are formed on the front and back of the back yoke end portion of the divided core pieces.
The concave portion 17 and the convex portion 18 mesh with each other to form a rotatable connecting portion.
Further, the number of places where holes are formed in the step S2 is increased by one for the above-described convex portion 18.
However, it is the same as in the fourth embodiment that the step S2 is used only for the manufacture of the lowermost layer or the uppermost laminated core member.

When the iron core member 530a and the iron core member 530c are alternately manufactured and are laminated while being alternately formed, a laminated iron core member 540a shown in FIG. 22A is formed.
Since the number of teeth of the laminated core member 540a is 6, five cores 500b are completed when these are arranged in an annular shape.
Similarly, when the iron core member 530b and the iron core member 530d are alternately manufactured and laminated while being alternately formed, a laminated iron core member 540b shown in FIG. 22B is formed.
Since the number of teeth of the laminated iron core member 540b is six, the iron core 500b is completed when four of them are arranged in an annular shape.

According to the manufacturing method of the laminated fixed iron core according to the fifth embodiment, as in the effect of the fourth embodiment, the gold used in the step of forming the end portion of the adjacent back yoke in accordance with the iron core member to be manufactured. Different types of iron core members can be manufactured by using only the molds and using the same mold in other processes.
In addition to the effects of the fourth embodiment, since the adjacent iron cores are connected by the concave portions 17 and the convex portions 18, it is possible to obtain a laminated fixed iron core with good assemblability.

Moreover, since a some division | segmentation core piece can be manufactured at once, a lamination | stacking fixed core can be manufactured efficiently.
In the present embodiment, as an example, the total number of slots is 30 and 24 split laminated iron cores have been described, but it goes without saying that the same effect can be obtained even with other numbers of slots.
In addition, although two types of divided laminated cores have been described, it goes without saying that the same effect can be obtained with divided laminated cores having three or more different numbers of slots.

  The method for manufacturing a laminated fixed iron core of a rotating electrical machine according to the present invention can reduce equipment investment costs and equipment management costs at the time of iron core production by sharing a press die and a press machine. It can be used for rotating electrical machines that require high performance.

100a, 100b, 200a, 200b, 300a, 300b, 400a, 400b, 500a, 500b (laminate fixed) iron core,
10a, 10b, 210a, 210b, 310a, 310b split laminated iron core,
13a, 13b, 14a, 14b end, 17 concave, 18 convex,
20a, 20b, 220a, 220b, 320a, 320b, 420a, 420b, 420c, 420d Split core pieces,
21a Back yoke, 22,422 Magnetic pole teeth,
23a, 23b, 24a, 24b, 223a, 223b, 224a, 224b, 323a, 323b, 324a, 324b end face,
4,404,504 Extruded caulking part, 5,405 Through hole,
6a, 6b, 9, 409 hatching, 425a, 425c gap,
430a, 430b, 430c, 430d, 530a, 530b, 530c, 530d iron core member,
440a, 440b, 540a, 540b Laminated core member.

Claims (8)

In a manufacturing method of a laminated fixed core configured by combining a plurality of divided laminated cores formed by punching a divided iron core piece constituted by a back yoke and magnetic pole teeth from a magnetic steel sheet and laminating the divided iron core pieces,
Change only the mold that forms the end of the adjacent back yoke,
A method for manufacturing a laminated fixed core, which includes a core member manufacturing process for manufacturing a plurality of types of the divided laminated cores using a common mold for forming the divided core pieces other than the end portions. The method for manufacturing a laminated fixed core according to claim 1, wherein the plurality of laminated fixed cores have the same diameter, and the number of the divided laminated cores constituting each of the laminated fixed cores is different. The method for manufacturing a laminated fixed core according to claim 1, wherein the plurality of laminated fixed cores have different diameters, and the number of the divided laminated cores constituting each of the laminated fixed cores is equal. 2. The method for manufacturing a laminated fixed core according to claim 1, wherein the plurality of laminated fixed cores have different diameters, and the number of the divided laminated cores constituting each of the laminated fixed cores is also different. The iron core member manufacturing process includes:
Of all the split core pieces constituting the laminated fixed core,
A first core member manufacturing process for simultaneously forming a predetermined number of first divided core pieces in a state of being arranged in a horizontal row;
A second core member manufacturing process for simultaneously forming a predetermined number of second divided core pieces in a state of being arranged in a horizontal row;
5. The stacking step of alternately stacking the first iron core member and the second iron core member to form a connecting portion between the end portions of the back yoke of the split laminated core. Method for manufacturing a laminated fixed iron core. The method for manufacturing a laminated fixed core according to claim 5, wherein the iron core member manufacturing step forms a thin connecting portion between the end portions of the adjacent back yokes. The method for manufacturing a laminated fixed core according to claim 5, wherein the iron core member manufacturing step forms an uneven portion that rotatably connects the adjacent back yokes on the front and back of the end portion of the back yoke. The manufacturing method of the laminated fixed core according to any one of claims 1 to 7, wherein the plurality of dies that are selectively used to form the end portion of the back yoke have different cutting angles on the end surface of the back yoke. Method.

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