CN112217350A

CN112217350A - Method for manufacturing laminated core of rotating electrical machine, laminated core manufacturing apparatus, and rotating electrical machine

Info

Publication number: CN112217350A
Application number: CN202010646002.3A
Authority: CN
Inventors: 吉冈翔太; 中野圣士; 中野正嗣; 小塚健太郎
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2019-07-12
Filing date: 2020-07-07
Publication date: 2021-01-12
Anticipated expiration: 2040-07-07
Also published as: JP6877495B2; JP2021016252A; CN112217350B

Abstract

Provided are a method for manufacturing a laminated core for a rotating electrical machine, a laminated core manufacturing device, and a rotating electrical machine, which can realize efficient manufacturing by punching a plurality of plate-shaped stator core elements simultaneously and accurately in one process. In a method of manufacturing a laminated core for a rotating electrical machine, prior to a step of punching a plate-shaped rotor core element (21) from a strip-shaped magnetic steel plate (4) formed by rolling by a punching mechanism (55), a plurality of plate-shaped stator core elements (11) are punched at a time in a plurality of punching steps in a second region (42) of the strip-shaped magnetic steel plate (4) that is more inside than a first region (41) in which the plate-shaped rotor core element (21) is punched.

Description

Method for manufacturing laminated core of rotating electrical machine, laminated core manufacturing apparatus, and rotating electrical machine

Technical Field

The present application relates to a method and an apparatus for manufacturing a laminated core for a rotating electrical machine, and a rotating electrical machine.

Background

As a conventional method for extracting a rotor core and a stator core from the same steel sheet at a high yield (co-extraction), the following methods are disclosed. Patent document 1 is a common material taking method for punching a plurality of stator cores from the inside of a rotor core.

Patent document 2 is a collective blanking method for blanking a plurality of stator cores from the outer shape portion of the rotor core, which is also improved in yield compared to patent document 1.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2002-186227

Patent document 2: japanese patent laid-open publication No. 2013-

In each of the techniques described in

patent documents

1 and 2, the rotor core and the stator core are not punched at one time but are processed in a plurality of steps in consideration of punching accuracy and the life of the die. However, an efficient manufacturing method for punching out a plurality of plate-shaped stator core elements simultaneously with high accuracy through one process is neither disclosed nor suggested.

Disclosure of Invention

The present application discloses a technique realized in view of the above-described circumstances, and an object thereof is to enable efficient manufacturing in which a plurality of plate-shaped stator core elements are punched out simultaneously with high accuracy in one process.

The application discloses a method for manufacturing a laminated iron core of a rotating electrical machine, the rotating electrical machine comprises: a stator core configured by annularly connecting stator core element lamination blocks in a circumferential direction, the stator core element lamination blocks configured by laminating plate-shaped stator core elements formed in a T shape by a pole tooth portion and a core back portion in an axial direction; and a rotor core that is configured by laminating annular plate-shaped rotor core elements in an axial direction and is surrounded by the stator core, wherein, prior to a process of blanking the plate-shaped rotor core elements from a strip-shaped electromagnetic steel sheet formed by rolling by a punching mechanism, a plurality of plate-shaped stator core elements are blanked at a time by a plurality of processes in a second region of the strip-shaped electromagnetic steel sheet that is further inward than a first region in which the plate-shaped rotor core elements are blanked.

In a method for manufacturing a laminated core for a rotating electrical machine disclosed in the present application, the rotating electrical machine includes: a stator core configured by annularly connecting stator core element lamination blocks in a circumferential direction, the stator core element lamination blocks configured by laminating plate-shaped stator core elements formed in a T shape by a pole tooth portion and a core back portion in an axial direction; and a rotor core that is configured by laminating annular plate-shaped rotor core elements in an axial direction and is surrounded by the stator core, wherein, in the laminated core manufacturing method, before a step of punching out the plate-shaped rotor core elements from a strip-shaped electromagnetic steel plate formed by rolling by a punching mechanism, a plurality of plate-shaped stator core elements are punched out at a time by a plurality of punching steps in a second region of the strip-shaped electromagnetic steel plate that is further inward than a first region where the plate-shaped rotor core elements are punched out, and therefore, efficient manufacturing in which the plurality of plate-shaped stator core elements are punched out simultaneously with high accuracy in each of the plurality of punching steps can be achieved.

Drawings

Fig. 1 is a diagram illustrating embodiment 1 of the present application, and is a plan view illustrating an example of a rotating electric machine that is a target of a method and an apparatus for manufacturing a laminated core of the rotating electric machine.

Fig. 2 is a plan view showing embodiment 1 of the present application, illustrating a concept of a laminated core manufacturing method.

Fig. 3 is a view showing embodiment 1 of the present application, which is a plan view showing an example of a plate-shaped stator core element.

Fig. 4 is a view showing embodiment 1 of the present application, and is a perspective view showing an example of a laminated stator core element block.

Fig. 5 is a diagram showing embodiment 1 of the present application, which is a front view schematically illustrating a laminated core manufacturing apparatus.

Fig. 6 is a view showing embodiment 1 of the present application, which is a schematic plan view illustrating a laminated core manufacturing apparatus.

Fig. 7 is a plan view showing embodiment 1 of the present application, which is a method for punching a plurality of plate-shaped stator core elements at a time in a plurality of punching steps.

Fig. 8 is a plan view showing embodiment 2 of the present application, which is an example of the concept of a laminated core manufacturing method.

Fig. 9 is a plan view showing embodiment 2 of the present application, which is a method for punching a plurality of plate-shaped stator core elements at a time in a plurality of punching steps.

Fig. 10 is a plan view showing embodiment 3 of the present application, which is an example of the concept of a laminated core manufacturing method.

Fig. 11 is a plan view showing embodiment 3 of the present application, which is a method for punching a plurality of plate-shaped stator core elements at a time in a plurality of punching steps.

Fig. 12 is a plan view of a stator core illustrating features of the stator core in the manufacturing method according to embodiments 1 to 3 of the present application.

Fig. 13 is a plan view of a stator core illustrating another feature of the stator core of the present application.

(symbol description)

1 a stator core; 11 a plate-shaped stator core element; 11T pole tooth parts; 11CB core back; 11LB stator core element lamination block; 12 a frame; 2 a rotor core; 21 a plate-shaped rotor core element; 211 a hole for a magnet; 3, rotating a shaft; 4 a strip-shaped electromagnetic steel sheet; 41 a first region; 42 a second region; a4 belt-like electromagnetic steel sheet feeding direction; 5 manufacturing the device; a 50-strip-shaped electromagnetic steel plate flattening mechanism; 501 outer guide pins; 502 inboard guide pins; 51 a first stamping mechanism; 511 a first plate-like stator core element blanking punch; 512 a first plate-like stator core element blanking die; 513 a first plate-like stator core element storage chamber; 514 a first stator core element lamination block discharge port; 52 a second stamping mechanism; 521 blanking male dies for the second plate-like stator core elements; 522 a second plate-like stator core element blanking negative die; 523 to the stage ofTwo plate-like stator core element storage chambers; 524 a second stator core element lamination block exhaust port; 53 third stamping mechanism; 531 a third sheet stator core element blanking punch; 532 a third sheet stator core element blanking cavity die; 533 a third plate-like stator core element storage chamber; 534 a third stator core component lamination block exhaust port; 54 a fourth stamping mechanism; 541 a fourth plate-like stator core element blanking punch; 542 a fourth plate-like stator core element blanking die; 543 a fourth plate-like stator core element storage chamber; 544 a fourth stator core element lamination block exhaust port; 55 a fifth stamping mechanism; 551 a fifth plate-like rotor core element blanking punch; 552 fifth plate-like rotor core element blanking cavity die; 553 a fifth plate-like rotor core element storage chamber; 554 rotor core element lamination stack exhaust port; 56 a scrap severing mechanism; 561 electromagnetic steel plate scrap cutting male die; 562 a cutting female die for electromagnetic steel plate waste; 563 a scrap stocker for cutting the electromagnetic steel sheet; 564 cutting the electromagnetic steel sheet scrap discharge port; A4M rolling direction of the strip-shaped electromagnetic steel plate; t is_1-1、T_1-2、T_1-3、T_1-4、T_1-5、T_1-6、T_1-7、T_1-8、T_1-9、T_1-10A plate-shaped stator core element blanking object; t is_2-1、T_2-2、T_2-3、T_2-4、T_2-5、T_2-6、T_2-7、T_2-8、T_2-9、T_2-10、T_2-11、T_2-12、T_2-13、T_2-14、T_2-15、T_2-16、T_2-17、T_2-18A plate-shaped stator core element blanking object; t is_3-1、T_3-2、T_3-3、T_3-4、T_3-5、T_3-6、T_3-7、T_3-8、T_3-9、T_3-10、T_3-11、T_3-12Plate-shaped stator core elements are punched out of objects.

Detailed Description

Embodiments of a method and an apparatus for manufacturing a laminated core for a rotating electrical machine and a rotating electrical machine according to the present invention will be described below with reference to the drawings. The present invention is not limited to the following description, and can be appropriately modified within a scope not departing from the gist of the present invention. In the drawings shown below, for convenience of understanding, the proportional dimensions of the respective members may be different from those of the actual members, or the structures not related to the features of the present application may be omitted from illustration.

Embodiment mode 1

Hereinafter, a method for manufacturing a laminated core for a rotating electrical machine, an apparatus for manufacturing a laminated core, and embodiment 1 of a rotating electrical machine having a laminated core will be described with reference to fig. 1 to 7 and 12. Fig. 1 is a plan view showing an example of a rotating electric machine which is a target of a method and an apparatus for manufacturing a laminated core of the rotating electric machine. Fig. 2 is a plan view illustrating a concept of a laminated core manufacturing method, fig. 3 is a plan view illustrating an example of a plate-shaped stator core element, fig. 4 is a perspective view illustrating an example of a laminated block of stator core elements, fig. 5 is a front view schematically illustrating a laminated core manufacturing apparatus, fig. 6 is a plan view schematically illustrating a laminated core manufacturing apparatus, fig. 7 is a plan view illustrating a method of punching a plurality of plate-shaped stator core elements at a time in a plurality of punching steps, and fig. 12 is a plan view of a stator core illustrating features of the stator core.

A rotating electrical machine which is a target of a method and an apparatus for manufacturing a laminated core for a rotating electrical machine includes, as an example illustrated in fig. 1, 3, and 4: a stator core portion configured by annularly connecting stator core component laminated blocks 11LB (see fig. 4) in a circumferential direction as illustrated in fig. 1, the stator core component laminated blocks 11LB being configured by laminating plate-shaped stator core components 11 (see fig. 3) formed in a T-shape by a tooth portion 11T and a core back portion 11CB in an axial direction of a rotating shaft 3; and a rotor core that is configured by laminating annular plate-shaped rotor core elements 21 in the axial direction and that is surrounded by the stator core.

The stator core element lamination blocks 11LB connected annularly in the circumferential direction are strongly fitted into the inner periphery of the annular frame 12. By the above-described strong fitting, the stator core element laminated block 11LB group annularly connected in the circumferential direction maintains a state annularly connected in the circumferential direction, that is, the state of fig. 1.

As shown in fig. 2, before a strip-shaped magnetic steel sheet raw ingot is punched by a punching mechanism to punch out a plate-shaped rotor core element 21 from a first region of a strip-shaped magnetic steel sheet 4 rolled and formed in a strip-shaped magnetic steel sheet rolling direction A4M by punching rollers not shown in the drawing, plate-shaped stator core elements 11, … (10 in the example of fig. 2) connected annularly in the circumferential direction are sequentially punched out so as to be punched out by the punching mechanism in a plurality of steps, not at once, but in a plurality of steps, from a second region 42 located on the inner side of the first region, before the plate-shaped rotor core element 21 is punched out from the first region of the strip-shaped magnetic steel sheet 4 rolled and formed in the strip-shaped magnetic steel sheet rolling direction A4M. Specifically, fig. 5 and 6 illustrating the manufacturing apparatus 5, and fig. 7 illustrating a method of punching a plurality of plate-shaped stator core elements at a time in a plurality of punching steps will be described in detail below.

When a strip-shaped magnetic steel sheet 4 rolled in a rolling direction A4M (hereinafter also referred to as "strip-shaped magnetic steel sheet rolling direction") is fed toward a manufacturing apparatus 5 in a direction of an arrow A4 (hereinafter also referred to as "strip-shaped magnetic steel sheet feeding direction"), irregular bending, deflection, or the like of the strip-shaped magnetic steel sheet 4 is first flattened by a strip-shaped magnetic steel sheet flattening mechanism 50.

Specifically, by inserting the outer guide pins 501 into the four corners outside the punched region of the plate-like rotor core member 21 of the strip-like magnetic steel plate 4, that is, the first region 41, by the strip-like magnetic steel plate flattening mechanism 50, tension is applied to the strip-like magnetic steel plate 4 at the four corners of the region 41, so that the region surrounded by the outer guide pins 501 of the four corners of the strip-like magnetic steel plate 4 (including the second region 42) is flattened.

Further, at any plural places in the second region 42 (region surrounded by the region where the plate-shaped rotor core member 21 is punched) of the strip-shaped electromagnetic steel plate 4, the inner guide pins 502 are inserted by the strip-shaped electromagnetic steel plate flattening mechanism 50 at positions not overlapping with the punched portions of the plate-shaped stator core member 11. By inserting the inner guide pins 502 into the strip-shaped magnetic steel sheet 4, the occurrence of distortion in the second region 42 of the strip-shaped magnetic steel sheet 4 due to punching by the punching mechanism of the plate-shaped stator core member 11 is suppressed.

In the manufacturing apparatus 5, a first press mechanism 51 is disposed downstream of the flattening mechanism 50 of the strip-shaped magnetic steel sheet in the feeding direction a4 of the strip-shaped magnetic steel sheet 4, a second press mechanism 52 is disposed downstream of the first press mechanism 51, a third press mechanism 53 is disposed downstream of the second press mechanism 52, a fourth press mechanism 54 is disposed downstream of the third press mechanism 53, a fifth press mechanism 55 is disposed downstream of the fourth press mechanism 54, and a scrap cutting mechanism 56 is disposed downstream of the fifth press mechanism 55.

The first press mechanism 51 has a plurality of (3 in embodiment 1) first plate-like stator core element blanking punches 511, and has a first plate-like stator core element blanking die 512 formed in a die plate corresponding to the first plate-like stator core element blanking punches 511.

The first plate-shaped stator core member blanking male die 511 is caused to cooperate with the first plate-shaped stator core member blanking female die 512 by the punching action of the first plate-shaped stator core member blanking male die 511 to blank the plate-shaped stator core members 11 from the strip-shaped electromagnetic steel sheets 4.

Corresponding to each of the plurality of first plate-like stator core element blanking female dies 512, a first plate-like stator core element storage chamber 513, a plurality of first stator core element lamination block discharge ports 514 are provided, respectively.

The second press mechanism 52 has a plurality of (2 in embodiment 1) second plate-shaped stator core element punching male dies 521, and has second plate-shaped stator core element punching female dies 522 formed in the die plate in correspondence with the second plate-shaped stator core element punching male dies 521.

The second plate-shaped stator core element blanking male die 521 is caused to cooperate with the second plate-shaped stator core element blanking female die 522 by the punching action of the second plate-shaped stator core element blanking male die 521 to blank the plate-shaped stator core elements 11 from the strip-shaped electromagnetic steel plates 4.

Corresponding to each of the plurality of second plate-shaped stator core element blanking female dies 522, a second plate-shaped stator core element storage chamber 523 and a plurality of second stator core element lamination block discharge ports 524 are provided, respectively.

The third press mechanism 53 has a plurality of (3 in embodiment 1) third plate-shaped stator core element punching male dies 531, and has third plate-shaped stator core element punching female dies 532 formed in the die plate corresponding to the third plate-shaped stator core element punching male dies 531.

By the punching action of the third plate-shaped stator core element punching male die 531, the third plate-shaped stator core element punching male die 531 cooperates with the third plate-shaped stator core element punching female die 532 to punch the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plates 4.

A third plate-shaped stator core element storage chamber 533, a plurality of third stator core element stacked block discharge ports 534 are provided, respectively, corresponding to each of the plurality of third plate-shaped stator core element blanking female dies 532.

The fourth press mechanism 54 has a plurality of (2 in embodiment 1) fourth plate-like stator core element punching male dies 541, and has a fourth plate-like stator core element punching female die 542 formed in the die plate in correspondence with the fourth plate-like stator core element punching male dies 541.

By the punching action of the fourth plate-shaped stator core element punching punch 541, the fourth plate-shaped stator core element punching punch 541 cooperates with the fourth plate-shaped stator core element punching die 542 to punch the plate-shaped stator core elements 11 from the strip-shaped electromagnetic steel sheet 4.

Corresponding to each of the plurality of fourth plate-like stator core element blanking dies 542, a fourth plate-like stator core element storage chamber 543, a plurality of fourth stator core element lamination block discharge openings 544 are provided, respectively.

The fifth press mechanism 55 has a fifth plate-like rotor core element blanking male die 551, and has a fifth plate-like rotor core element blanking female die 552 formed in the die plate in correspondence with the fifth plate-like rotor core element blanking male die 551.

The fifth plate-like rotor core element blanking male die 551 cooperates with the fifth plate-like rotor core element blanking female die 552 by the punching action of the fifth plate-like rotor core element blanking male die 551 to blank the plate-like rotor core elements 21 from the strip-like electromagnetic steel sheet 4.

Corresponding to the fifth plate-like rotor core element blanking female die 552, a fifth plate-like rotor core element storage chamber 553 and a rotor core element lamination block discharge port 554 are provided, respectively.

When all the punching by the first punching mechanism 51 to the fifth punching mechanism 55 is completed, the surplus material of the strip-shaped magnetic steel sheet 4 is scrap, and therefore, the scrap cut by the magnetic steel sheet scrap cutting male die 561 and the magnetic steel sheet scrap cutting female die 562 is stored in the cut magnetic steel sheet scrap storage chamber 563 and then taken out from the cut magnetic steel sheet scrap discharge port 564.

Next, referring to fig. 7 and 5, description will be made in order of a punching step of punching out a plurality of plate-shaped stator core elements at a time in a plurality of punching steps in a second region of a strip-shaped magnetic steel sheet on the inner side of a first region where the plate-shaped rotor core elements are punched out, prior to a step of punching out the plate-shaped rotor core elements from the strip-shaped magnetic steel sheet formed by rolling by a punching mechanism.

As illustrated in fig. 7, in the first punching step, three plate-shaped stator core element punching objects T of the strip-shaped electromagnetic steel plate 4 are punched in the second region 42 by the first punching mechanism 51 of fig. 5 and 6_1-1、T_1-2、T_1-3The strip-shaped magnetic steel sheet 4 is fed in the strip-shaped magnetic steel sheet feeding direction a4, and is fed to the second blanking step in the next step.

The three plate-shaped stator core elements 11 blanked in the first blanking process are individually stored in the three first plate-shaped stator core

element storage chambers

513, 513 of the manufacturing apparatus 5 of fig. 5 and 6.

As illustrated in fig. 7, in the second punching step, the second punching step is performed in the second region 42The second punching mechanism 52 shown in fig. 5 and 6 punches two plate-shaped stator core element punching targets T of the strip-shaped electromagnetic steel plate 4_1-4、T_1-5The strip-shaped magnetic steel sheet 4 is fed in the strip-shaped magnetic steel sheet feeding direction a4, and is fed to the third blanking step in the next step.

The two plate-shaped stator core elements 11 punched out in the second punching process are individually stored in the two second plate-shaped stator core

element storage chambers

523, 523 of the manufacturing apparatus 5 of fig. 5 and 6.

As illustrated in fig. 7, in the third punching step, three plate-shaped stator core element punching objects T of the strip-shaped electromagnetic steel plate 4 are punched in the second region 42 by the third punching mechanism 53 shown in fig. 5 and 6_1-6、T_1-7、T_1-8The strip-shaped magnetic steel sheet 4 is fed in the strip-shaped magnetic steel sheet feeding direction a4, and is fed to the fourth blanking step in the next step.

The three plate-shaped stator core elements 11 punched out in the third punching process are individually stored in the three third plate-shaped stator core

element storage chambers

533, 533 of the manufacturing apparatus 5 of fig. 5 and 6.

As illustrated in fig. 7, in the fourth punching step, in the second region 42, the two plate-shaped stator core element punching targets T of the strip-shaped electromagnetic steel plate 4 are punched by the fourth punching mechanism 54 of fig. 5 and 6_1-9、T_1-10The strip-shaped magnetic steel sheet 4 is fed in the strip-shaped magnetic steel sheet feeding direction a4, and is fed to the fifth blanking step in the next step.

The two plate-shaped stator core elements 11 punched out in the fourth punching step are individually stored in the two second plate-shaped stator core

element storage chambers

543, 543 of the manufacturing apparatus 5 of fig. 5 and 6.

At the punching end time point of the fourth punching step, all the plate-shaped stator core elements 11 … 11 used for the plate-shaped rotor core elements 21 at the time of assembling the rotating electrical machine (10 plate-shaped stator core element punching objects T for punching the strip-shaped electromagnetic steel plates 4 in the second region 42) are punched_1-1To T_1-10And a plate-shaped fixed core member).

In the first to fourth punching steps, all of the plate-shaped stator core elements 11 … 11 used with respect to the plate-shaped rotor core elements 21 at the time of assembling the rotary electric machine (10 plate-shaped stator core element punching objects T for punching the strip-shaped electromagnetic steel plates 4 in the second region 42) are punched from the second region 42_1-1To T_1-10And the formed plate-shaped stator core element) is followed by a fifth blanking process.

As illustrated in fig. 6, the fifth punching step is a step of punching the plate-like rotor core element 21 from the first region 41 of the strip-like electromagnetic steel plate 4 by the fifth punching mechanism 55.

One plate-shaped rotor core member 21 blanked in the fifth blanking process is individually stored in the plate-shaped rotor core member storage chamber 553 of the manufacturing apparatus 5 of fig. 5 and 6.

When the blanking in the first blanking step is completed, the strip-shaped magnetic steel sheet 4 is fed in the strip-shaped steel sheet feeding direction a4, and the area to be blanked in the first blanking step is moved to the second blanking step to perform the blanking in the second blanking step, but the strip-shaped magnetic steel sheet 4 that is not blanked in the first blanking step is blanked in the first blanking step while the blanking in the second blanking step is performed. Similarly, while the punching in the fifth punching step is performed, punching in the first punching step, the second punching step, the third punching step, and the fourth punching step is performed.

In this manner, when the first press mechanism 51, the second press mechanism 52, the third press mechanism 53, the fourth press mechanism 54, and the fifth press mechanism 55 are continuously operated and a predetermined number of plate-shaped stator core components 11 are stored in the corresponding first plate-shaped stator core component storage chamber 513, the second plate-shaped stator core component storage chamber 523, the third plate-shaped stator core component storage chamber 533, and the fourth plate-shaped stator core component storage chamber 543, the plate-shaped stator core components 11 stored in the predetermined number are automatically extruded by the extrusion mechanism inside the manufacturing apparatus 5 from the first plate-shaped stator core component storage chamber 513, the second plate-shaped stator core component storage chamber 523, the third plate-shaped stator core component storage chamber 533, and the fourth plate-shaped stator core component storage chamber 543, and are automatically extruded from the first stator core component stacked block outlet 514, the second stator core component stacked block outlet 524, and the fourth stator core component stacked block outlet 543, The third and fourth stator core element laminated

block discharge ports

534, 544 discharge the stator core element laminated block 11LB (see fig. 4).

Similarly, when a predetermined number of the plate-shaped rotor core components 21 are stored in the plate-shaped rotor core component storage chamber 553, the plate-shaped rotor core components 21 stored in the predetermined number are automatically extruded from the plate-shaped rotor core component storage chamber 553 by the extrusion mechanism inside the manufacturing apparatus 5, and are discharged from the rotor core component stacked block discharge port 554.

As described above, embodiment 1 exemplifies a method for manufacturing a laminated core of a rotating electrical machine including: a stator core 1 configured by annularly connecting stator core element lamination blocks 11LB in a circumferential direction of a rotary electric machine, the stator core element lamination blocks 11LB being configured by laminating plate-shaped stator core elements 11 formed in a T-shape by a pole tooth portion 11T and a core back portion 11CB in an axial direction of the rotary electric machine; and a rotor core 2 in which annular plate-shaped rotor core elements 21 are laminated in an axial direction of a rotating electrical machine, and the rotor core 2 is surrounded by the stator core 1, wherein, prior to a step (a fifth punching step in the present embodiment) of punching out the plate-shaped rotor core elements 21 from a strip-shaped magnetic steel sheet 4 formed by rolling by a punching mechanism 55, a plurality of plate-shaped stator core elements 11 are punched out at a time in each punching step through a plurality of punching steps (a first punching step to a fourth punching step in the present embodiment) in a second region 42 of the strip-shaped magnetic steel sheet 4 that is further inward than a first region 41 in which the plate-shaped rotor core elements 21 are punched out.

In the present embodiment, as illustrated in fig. 2 and 7, the center of the plate-like rotor core member 21 to be punched out is not limited to the center parallel to the rolling press conveyance direction a5 (i.e., the rolling direction A4M of the strip-like magnetic steel sheet, i.e., the feeding direction A4 of the strip-like magnetic steel sheet)Two plate-like rotor core element blanking objects T blanked on shaft CH21_1-2、T_1-7In addition, the number of plate-shaped stator core element blanking objects for blanking the plate-shaped stator core elements among the 10 plate-shaped stator core elements 11 is symmetrical to the central axis CH21 of the blanking object of the plate-shaped rotor core element 21 parallel to the rolling-pressing conveying direction a5 (i.e., the strip-shaped electromagnetic steel plate rolling direction A4M, i.e., the strip-shaped electromagnetic steel plate feeding direction A4) and the central axis CV21 of the blanking object of the plate-shaped rotor core element 21 perpendicular to the rolling-pressing conveying direction a5 (i.e., the strip-shaped electromagnetic steel plate rolling direction A4M, i.e., the strip-shaped electromagnetic steel plate feeding direction A4), respectively, so that the punching pressure of the plate-shaped stator core element blanking punch applied to the second region 42 of the strip-shaped electromagnetic steel plate 4 is uniformly dispersed when the plate-shaped stator core element blanking object in the second region 42 surrounded by the region, i.e., the first region 41, where the plate-shaped rotor core element, therefore, the dimensional accuracy of each of the plate-shaped stator core elements 11 is improved.

Further, since the orientations of the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all in the same direction, i.e., in the radial direction, as illustrated in fig. 12, it is possible to reduce the cogging torque or the torque pulses caused by the difference in the magnetic anisotropy due to the difference in the angle in the direction orthogonal to the strip-shaped electromagnetic steel sheet rolling direction A4 of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine.

Further, since the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all oriented in the same direction, i.e., in the radial direction, as illustrated in fig. 12, the direction of the magnetic flux passing through the plate-shaped stator core elements 11 when the rotating electrical machine is operated is the same as the strip-shaped electromagnetic steel sheet rolling direction A4M, and therefore, the magnetic properties in the strip-shaped electromagnetic steel sheet rolling direction A4M are good, and therefore, an effect of realizing a high-torque rotating electrical machine can be obtained.

In the present embodiment, as shown in fig. 7, the first punching step to the fourth punching step are divided into four steps10 plate-shaped stator core elements 11 are produced in a time. In each of the first to fourth blanking steps, the number of the plate-shaped stator core elements 11 to be blanked is 3, 2, respectively, and a plurality of the plate-shaped stator core elements 11 are not simultaneously blanked in a direction a6 perpendicular to a feeding direction a4 of the strip-shaped electromagnetic steel sheet (a 5 parallel to the feeding direction a4 of the strip-shaped electromagnetic steel sheet). Therefore, as illustrated in fig. 7, each plate-shaped stator core element blanking object T is blanked_1-1、T_1-2、T_1-3、T_1-4、T_1-5、T_1-6、T_1-7、T_1-8、T_1-9、T_1-10On the other hand, since the manufactured plate-shaped stator core elements are accumulated individually in each of the corresponding plate-shaped stator core

element storage chambers

513, 523, 533, 543 without being mixed with each other as indicated by arrow D13, the stator core element lamination blocks 11LB of the plate-shaped stator core elements manufactured in the first to fourth punching steps are taken out from the respective discharge ports of the first stator core element lamination block discharge port 514, the second stator core element lamination block discharge port 524, the third stator core element lamination block discharge port 534, and the fourth stator core element lamination block discharge port 544 of the manufacturing apparatus 5 without being mixed with each other, and the method of collecting the stator core element lamination blocks 11LB is facilitated, and the production efficiency is improved.

In each of the first to fourth punching steps, as illustrated in fig. 6 and 7, the adjacent plate-shaped stator core members are punched to have a spacing L16 in the strip-shaped electromagnetic steel sheet feeding direction a4 equal to or greater than the plate-shaped stator core member width L14 (see fig. 3) in the strip-shaped electromagnetic steel sheet feeding direction a4 and a spacing L17 in the direction perpendicular to the strip-shaped electromagnetic steel sheet feeding direction a4 and equal to or greater than the plate-shaped stator core member width L15 (see fig. 3) in the direction perpendicular to the strip-shaped electromagnetic steel sheet feeding direction a4, so that the die plate receiving the punching load by the punching mechanism can be kept rigid, and the dimensional accuracy of each of the plate-shaped stator core members 11 constituting the stator core member laminated block 11LB (see fig. 4) can be further improved.

The number of plate-shaped stator core elements 11 punched in the punching step can be generalized as follows. That is, if the number of plate-shaped stator core elements 11 punched inside the plate-shaped rotor core elements 21 is a natural number a and the number of punching steps for punching the plate-shaped stator core elements 11 is b, if c > a/b > d, which are adjacent natural numbers c and d, is set when a/b is not a natural number, the number of plate-shaped stator core elements 11 punched in the punching step of the plate-shaped stator core elements 11 can be represented by c or d.

The present invention further provides a large-diameter permanent magnet embedded motor. As an example of application of a large-diameter permanent magnet embedded motor, there is a hybrid system in which a motor is disposed between an engine and a transmission of an automobile, the engine is started using the motor, and kinetic energy of the automobile is regenerated into electric energy by power generation or torque is generated to assist the engine. In the above application example, it is needless to say that the efficiency of the motor is strictly required to be reduced in vibration and noise. In addition, in the large-diameter motor, if the inner region (second region 42) of the punched plate-shaped rotor core element in the strip-shaped electromagnetic steel plate is not effectively used, the material yield is deteriorated. When the plate-shaped stator core element and the plate-shaped rotor core element are manufactured by using the manufacturing method and the manufacturing apparatus of the present application, an effect that the dimensional accuracy can be improved as compared with the conventional one can be obtained. Further, since the accuracy of the stator core portion is also increased, the vibration and noise of the motor due to the deterioration of the shape accuracy can be suppressed.

In embodiment 1, since the direction of each pole tooth of the plate-shaped stator core element of the divided core is the same direction as the rolling direction A4M (see fig. 7 and 12), it is possible to reduce cogging torque or torque pulses caused by the difference in magnetic anisotropy due to the difference in angle between the plate-shaped stator core elements in the direction orthogonal to the rolling direction of each pole tooth. Further, there are effects as follows: the electromagnetic excitation force with low space dimension is reduced through the magnetic anisotropy performance, and the low vibration and the low noise of the motor can be realized. In particular, in a so-called "magnet embedded motor" in which permanent magnets are embedded in a core of a rotor, there are problems in particular in reducing vibration and noise, and therefore, the structure of the present application further exhibits effects. Since the direction having good magnetic properties can be used, the torque of the motor can be improved, and the efficiency can be improved.

Although the permanent magnet embedded motor is described here, it is needless to say that the same effect can be obtained even in other motor systems such as a surface magnet type motor.

Further, in embodiment 1, in the example of fig. 5 and 6, as the punching mechanism for punching the plate-like stator core element 11 from the strip-shaped electromagnetic steel sheet 4 and as the punching mechanism for punching the plate-like rotor core element 21 from the strip-shaped electromagnetic steel sheet 4, five punching mechanisms of the first punching mechanism 51, the second punching mechanism 52, the third punching mechanism 53, the fourth punching mechanism 54, and the fifth punching mechanism 55 are arranged in series in the strip-shaped electromagnetic steel sheet feeding direction a4, but the first stator core element punching male die 511, the second stator core element punching male die 521, the third stator core element punching male die 531, the fourth stator core element punching male die 541, the fifth stator core element punching male die 551, and the first plate-like stator core element punching female die 512, the second plate-like stator core element punching female die 522, the first punching mechanism 52, the second punching mechanism 52, the third punching mechanism 54, and the fifth punching mechanism 55 may be arranged in series in the strip-shaped electromagnetic steel sheet feeding direction a4, The third, fourth, and fifth plate-like stator core element blanking dies 532, 542, and 552 are associated with a single punching mechanism, and the first, second, third, fourth, and fifth stator core element blanking male dies 511, 521, 531, 541, and 551 are operated with time shifts. In the above case, the first punching step to the fifth punching step may be performed by moving one punching mechanism in the strip-shaped magnetic steel sheet feeding direction a 4.

In the stator core element laminated block 11LB in which the plate-shaped stator core elements 11 are laminated in the axial direction of the rotating electrical machine, the laminated state of the plate-shaped stator core elements 11 of the stator core element laminated block 11LB taken out from the

outlet ports

514, 524 … of the manufacturing apparatus 5 is made less likely to collapse by caulking the laminated plate-shaped stator core elements 11 to each other in a step preceding the first punching step.

Further, fig. 12 illustrates a case where the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all oriented in the same direction as the radial direction of the rotating electrical machine, but as illustrated in fig. 13, the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine may be all oriented in the same direction as the circumferential direction of the rotating electrical machine, and if the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all oriented in the same direction, a corresponding effect can be achieved.

Embodiment mode 2

In embodiment 2, as in embodiment 1, the plate-shaped rotor core elements 21 are taken out from the same magnetic steel plate 4, and the plate-shaped stator core elements 11 are taken out from the region surrounded by the plate-shaped rotor core elements 21, as illustrated in fig. 8 and 9. A magnet hole 211 for embedding a permanent magnet is formed in the rotor core 2. Caulking for fixing the plate-shaped stator core elements to each other is performed on the stator core 1.

As illustrated in fig. 8 and 9, embodiment 2 is an example of a case where 4 to 18 plate-shaped stator core elements 11 are punched out of a strip-shaped electromagnetic steel sheet 4. Except for two plate-shaped stator core element punching objects T punched on the central axis CV21 of the plate-shaped rotor core element 21 vertical to the feeding direction A4 of the strip-shaped electromagnetic steel plate_2-3、T_2-12In addition, since the number of punched pieces of the plate-shaped stator core elements 11 is symmetrical with respect to the central axis CH21 of the plate-shaped rotor core element 21 parallel to the feeding direction a4 of the strip-shaped electromagnetic steel sheet and the central axis CV21 of the plate-shaped rotor core element 21 perpendicular to the plate-shaped rotor core element 21, the punching pressure applied to the plate-shaped stator core elements 11 by the punching mechanism is uniformly distributed, as in the case of embodiment 1 described above, and therefore, the plate-shaped stator core elements are formed as a single pieceThe dimensional accuracy of each of 11 is improved.

Further, since the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all oriented in the same direction, i.e., in the radial direction, as illustrated in fig. 12, the direction of the magnetic flux passing through the plate-shaped stator core elements 11 when the rotating electrical machine is operated is the same as the direction of the strip-shaped electromagnetic steel sheet rolling direction A4M, and therefore, the magnetic properties in the strip-shaped electromagnetic steel sheet rolling direction A4M are good, and therefore, an effect of realizing a high-torque rotating electrical machine can be obtained.

In embodiment 2, as illustrated in fig. 9, 18 plate-shaped stator core elements 11 are produced four times in the first to fourth punching steps. In each punching step, the number of the punched plate-shaped stator core elements 11 is 5, 4, respectively, and the plate-shaped stator core elements 11 are simultaneously punched in a direction a6 perpendicular to a rolling direction A4M of the strip-shaped electromagnetic steel sheet (a 5 parallel to a feeding direction A4 of the strip-shaped electromagnetic steel sheet). Therefore, as illustrated in fig. 7, each plate-shaped stator core element blanking object T is blanked_2-1、T_2-2、T_2-3、T_2-4、T_2-5、T_2-6、T_2-7、T_2-8、T_2-9、T_2-10、T_2-11、T_2-12、T_2-13、T_2-14、T_2-15、T_2-16、T_2-17、T_2-18On the other hand, since the manufactured plate-shaped stator core elements are accumulated in the respective corresponding plate-shaped stator core

element storage chambers

513, 523, 533, 543 (see fig. 5) without being mixed with each other as indicated by an arrow D13, the stator core element lamination blocks 11LB of the plate-shaped stator core elements manufactured in the first to fourth punching steps are taken out from the respective discharge ports of the first stator core element lamination block discharge port 514, the second stator core element lamination block discharge port 524, the third stator core element lamination block discharge port 534, and the fourth stator core element lamination block discharge port 544 of the manufacturing apparatus 5 without being mixed with each other, and the method of collecting the stator core element lamination blocks 11LB is facilitated, and the production efficiency is improved.

Further, as in the case of embodiment 1 described above, in each of the first to fourth punching steps, the punching targets of the adjacent plate-shaped stator core elements are separated in the strip-shaped magnetic steel sheet feeding direction a4 by a space L16 (see fig. 7) equal to or larger than the plate-shaped stator core element width L14 (see fig. 3) of the strip-shaped magnetic steel sheet feeding direction a4 and separated in the direction perpendicular to the strip-shaped magnetic steel sheet feeding direction a4 by a space L17 (see fig. 7) equal to or larger than the plate-shaped stator core element width L15 (see fig. 3) of the direction perpendicular to the strip-shaped magnetic steel sheet feeding direction a4, so that the rigidity of the die plate receiving the punching load by the punching mechanism can be maintained, and therefore, the dimensional accuracy of each of the plate-shaped stator core elements 11 constituting the LB core element laminated block 11 (see fig. 4) is further improved.

Embodiment 3

In embodiment 3, too, as in

embodiments

1 and 2 described above, as illustrated in fig. 10 and 11, plate-shaped rotor core elements 21 are taken out from the same electromagnetic steel plate 4, and plate-shaped stator core elements 11 are taken out from the region surrounded by the plate-shaped rotor core elements 21. A magnet hole 211 for embedding a permanent magnet is formed in the rotor core 2. Caulking for fixing the plate-shaped stator core elements to each other is performed on the stator core 1.

As illustrated in fig. 10 and 11, embodiment 3 is an example of a case where 12 plate-shaped stator core elements 11 are punched out of a strip-shaped electromagnetic steel plate 4. Except for two plate-shaped stator core element punching objects T punched on the central axis CV21 of the plate-shaped rotor core element 21 vertical to the feeding direction A4 of the strip-shaped electromagnetic steel plate_3-2、T_3-5In addition, since the number of punched plate-shaped stator core elements 11 is symmetrical with respect to the central axis CH21 of the plate-shaped rotor core element 21 parallel to the feeding direction a4 of the strip-shaped electromagnetic steel sheet and the central axis CV21 of the plate-shaped rotor core element 21 perpendicular to the plate-shaped rotor core element 21, the punching pressure applied to the plate-shaped stator core elements 11 by the punching mechanism is uniformly dispersed, as in the case of embodiment 1 described above, and therefore, the dimensional accuracy of each of the plate-shaped stator core elements 11 is improved.

Further, since the orientations of the strip-shaped electromagnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all in the same direction, i.e., in the radial direction, as illustrated in fig. 12, it is possible to reduce the cogging torque or the torque pulse caused by the difference in the magnetic anisotropy caused by the difference in the angle of the direction orthogonal to the strip-shaped electromagnetic steel sheet rolling direction A4 of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine.

In embodiment 3, as illustrated in fig. 11, 12 plate-shaped stator core elements 11 are produced four times in the first to fourth punching steps. In each punching step, the number of the punched plate-shaped stator core elements 11 is 3, and the plate-shaped stator core elements 11 are not simultaneously punched in the direction a6 perpendicular to the rolling direction A4M of the strip-shaped electromagnetic steel sheet (the direction a5 parallel to the feeding direction A4 of the strip-shaped electromagnetic steel sheet), and therefore, as illustrated in fig. 11, the punching objects T of each plate-shaped stator core element are punched_3-1、T_3-2、T_3-3、T_3-4、T_3-5、T_3-6、T_3-7、T_3-8、T_3-9、T_3-10、T_3-11、T_3-12Since the manufactured plate-shaped stator core elements are accumulated in the respective corresponding plate-shaped stator core element storage chambers 513, 523, 533, 543 (see fig. 5) as indicated by the arrow D13 without being mixed with each other, the stator core element stacked blocks 11LB of the plate-shaped stator core elements manufactured in the first to fourth punching steps are not mixed with each other but are stacked from the first punching step of the manufacturing apparatus 5The respective discharge ports of the stator core element laminated block discharge port 514, the second stator core element laminated block discharge port 524, the third stator core element laminated block discharge port 534, and the fourth stator core element laminated block discharge port 544 are taken out, the method of recovering the stator core element laminated block 11LB becomes easy, and the production efficiency is improved.

Further, as in embodiment 3, the dimensional accuracy is further improved by making the number of punched plate-shaped stator core elements 11 as uniform as possible in each punching step to distribute the load applied to the plate-shaped stator core elements 11.

In embodiment 3, the number of plate-shaped stator core elements 11 punched in the punching step can be generalized as follows. That is to say that the first and second electrodes,

if the number of plate-shaped stator core elements 11 punched inside the plate-shaped rotor core elements 21 is set to a natural number a,

the number of punching steps for punching the plate-like stator core element 11 is set to a natural number b,

in case a/b is a natural number,

when e is set to a natural number e such as a/b,

the number of plate-shaped stator core elements 11 punched in the punching process of the plate-shaped stator core elements 11 can be represented by a natural number e.

The dimensional accuracy is further improved by making the number of blanking uniform as much as possible in each blanking process to disperse the pressing load applied to the stator core 1.

In a modified view, the following characteristic matters exist in the above embodiments 1 to 3.

Feature item 1:

a method of manufacturing a laminated core, wherein,

the laminated core portion is manufactured by laminating punched electromagnetic steel sheets,

in the method of manufacturing a laminated core, the rotor core and the stator core are taken out from the inside of the rotor core,

and simultaneously blanking a plurality of stator cores in each process of blanking the stator cores,

and the stator core is blanked through a plurality of the processes,

in the plurality of steps of punching the stator cores, the plurality of stator cores are simultaneously punched while maintaining a predetermined interval, and therefore, there is an effect that dimensional accuracy is improved.

Feature item 2:

in addition to the manufacturing method of the feature item 1, in the manufacturing method of the laminated core portion,

in each step of punching out the stator core, the punched out stator core is ejected in a direction perpendicular to the die conveying direction in a non-confusing manner.

The method of recovering the laminated core portion is easy, and therefore, the production efficiency is further improved.

Feature item 3:

in the case of taking the stator core from the inside of the rotor core,

if the number of stator cores punched inside the rotor core is a natural number a,

the number of the steps of punching the stator core is set as a natural number b,

then in the case where a/b is not a natural number,

if the adjacent natural numbers c and d are set as c > a/b > d,

the number of stator cores punched in the process of punching the stator cores can be represented by a natural number c or d,

the number of the punched parts is made as uniform as possible in each process of punching the stator core to disperse the pressure applied to the stator core, thereby having an effect of further improving the dimensional accuracy.

Feature item 4:

in the case of taking the stator core from the inside of the rotor core,

in case a/b is a natural number,

when e is set to a natural number e such as a/b,

the number of stator cores punched in the process of punching the stator cores can be represented by a natural number e,

the size precision is further improved by making the number of blanking uniform as much as possible in each process of blanking the stator core to disperse the pressure applied to the stator core.

Feature item 5:

in addition to the method of manufacturing the characteristic item 1, in the method of manufacturing the laminated core portion having the tooth shape,

in the step of punching the stator cores, the adjacent stator cores are spaced apart in the punching conveying direction by a distance equal to or greater than the width of the pole teeth in the punching conveying direction,

when punching the stator cores simultaneously, the interval between the adjacent stator cores can be maintained, and therefore, the dimensional accuracy of the stator cores can be further improved.

Feature item 6:

in the step of punching out the stator cores, the adjacent stator cores are spaced apart in a direction perpendicular to a punching conveying direction by an interval equal to or larger than a tooth width in the direction perpendicular to the punching conveying direction,

Feature item 7:

the number of stator cores taken from the inner side of the rotor core is symmetrical with respect to the central axis of the rotor core parallel to the press-conveying direction, in addition to the number of stator cores punched on the central axis of the rotor core parallel to the press-conveying direction,

by making the arrangement of the stator cores symmetrical, the pressure applied to the stator cores is uniformly dispersed, and therefore, there is an effect that the dimensional accuracy is further improved.

Feature item 8:

the number of stator cores taken from the inner side of the rotor core is symmetrical with respect to the central axis of the rotor core perpendicular to the press-conveying direction, in addition to the number of stator cores punched on the central axis of the rotor core perpendicular to the press-conveying direction,

Feature item 9:

the yoke parts of the stator cores are all oriented in the same direction,

the cogging torque and the torque pulse caused by the difference of the magnetic anisotropy generated by the difference of the rolling direction and the straight running direction can be reduced. Since a direction having good magnetic properties can be used, an effect of high torque can be obtained.

Feature item 10:

a laminated core manufacturing apparatus in which punched electromagnetic steel sheets are laminated and manufactured, the laminated core manufacturing apparatus having a die in which,

the rotor core and the stator core are blanked from the inner side of the rotor core,

and the stator core is blanked through a plurality of the processes,

Feature item 11:

the manufacturing apparatus of the laminated core part according to the feature 10, further comprising a mold in which,

in each step of punching out the stator core, the punched out stator core is ejected in a direction perpendicular to the die conveying direction in a non-confusing manner,

since the method of recovering the laminated core is easy, the production efficiency is further improved.

Feature item 12:

in the case of blanking the stator core from the inside of the rotor core,

then in the case where a/b is not a natural number,

if the adjacent natural numbers c and d are set as c > a/b > d,

the number of punched parts is made as uniform as possible in each process of punching the stator core to disperse the pressure applied to the stator core, thereby having an effect of further improving the dimensional accuracy.

Feature item 13:

in the case of blanking the stator core from the inside of the rotor core,

in case a/b is a natural number,

when e is set to a natural number e such as a/b,

Feature item 14:

Feature item 15:

Feature item 16:

Feature item 17:

Feature item 18:

the yoke parts of the stator cores are all oriented in the same direction,

the difference in magnetic anisotropy caused by the difference between the rolling direction and the straight traveling direction and the cogging torque or torque pulse caused by the difference can be reduced. Since a direction having good magnetic properties can be used, an effect of high torque can be obtained.

Feature item 19:

a rotating electrical machine manufactured by a method of manufacturing a laminated core in which punched electromagnetic steel sheets are laminated,

taking the rotor core and the stator core from the inner side of the rotor core,

the yoke parts of the stator cores are all oriented in the same direction,

In the drawings, the same reference numerals denote the same or corresponding parts.

In addition, although the present application describes various exemplary embodiments and examples, various features, modes, and functions described in one or more embodiments are not limited to the application to specific embodiments, and can be applied to the embodiments alone or in various combinations.

Therefore, countless modifications not illustrated are assumed to be within the technical scope disclosed in the present application. For example, the case where at least one component is modified, added, or omitted is included, and the case where at least one component is extracted and combined with the components of other embodiments is also included.

Claims

1. A method of manufacturing a laminated core for a rotating electrical machine, wherein the rotating electrical machine comprises:

a stator core configured by annularly connecting stator core element lamination blocks in a circumferential direction, the stator core element lamination blocks configured by laminating plate-shaped stator core elements formed in a T shape by a pole tooth portion and a core back portion in an axial direction; and

a rotor core that is configured by laminating annular plate-shaped rotor core elements in an axial direction and that is surrounded by the stator core,

the method for manufacturing a laminated core for a rotating electrical machine is characterized in that,

prior to the step of blanking the plate-like rotor core member from a strip-like electromagnetic steel plate formed by rolling by a punching mechanism,

in a second region of the strip-shaped electromagnetic steel sheet that is further inside than the first region from which the plate-shaped rotor core member is punched,

a plurality of plate-shaped stator core elements are blanked at a time by a plurality of blanking processes.

2. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

each time the plate-shaped stator core members are blanked out of the strip-shaped electromagnetic steel sheet, the blanked-out plate-shaped stator core members are stored in respective plate-shaped stator core member storage chambers in a direction perpendicular to a feeding direction of the strip-shaped electromagnetic steel sheet.

3. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

in the case of blanking the plate-like stator core elements from the area enclosed by the ring-like plate-like rotor core elements,

if the number of the plate-shaped stator core elements punched out from the area surrounded by the plate-shaped rotor core elements is set to a natural number a,

the number of steps for punching the plate-shaped stator core element is a natural number b,

then in the case where a/b is not a natural number,

if the adjacent natural numbers c and d are set as c > a/b > d,

the number of the plate-shaped stator core elements punched in the step of punching the plate-shaped stator core elements is set to the natural number c or d.

4. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

if the number of the plate-shaped stator core elements punched out from the region surrounded by the plate-shaped rotor core elements is set to a natural number a,

in case a/b is a natural number,

when e is set to a natural number e such as a/b,

the number of the plate-shaped stator core elements punched in the step of punching the plate-shaped stator core elements is set to the natural number e.

5. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

in the step of punching out the plate-shaped stator core elements, the adjacent plate-shaped stator core elements are spaced apart from each other in the feeding direction of the strip-shaped electromagnetic steel sheet by a distance equal to or greater than the width of the plate-shaped stator core elements in the feeding direction of the strip-shaped electromagnetic steel sheet.

6. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

in the step of punching out the plate-shaped stator core elements, the adjacent plate-shaped stator core elements are spaced apart from each other in a direction perpendicular to a feeding direction of the strip-shaped electromagnetic steel sheet by an interval equal to or greater than a width of the plate-shaped stator core elements in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel sheet.

7. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

the number of the plate-shaped stator core members blanked out from the region surrounded by the plate-shaped rotor core members is symmetrical with respect to the central axis of the plate-shaped rotor core member parallel to the feeding direction of the strip-shaped electromagnetic steel sheet, except for the plate-shaped stator core member blanked out on the central axis of the plate-shaped rotor core member parallel to the feeding direction of the strip-shaped electromagnetic steel sheet.

8. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

the number of the plate-shaped stator core members blanked out from the region surrounded by the plate-shaped rotor core members is symmetrical with respect to the central axis of the plate-shaped rotor core member perpendicular to the feeding direction of the strip-shaped electromagnetic steel sheet, except for the plate-shaped stator core member blanked out on the central axis of the plate-shaped rotor core member perpendicular to the feeding direction of the strip-shaped electromagnetic steel sheet.

9. The method of manufacturing a laminated core for a rotating electrical machine according to claim 1,

the respective pole teeth of the punched plate-shaped stator core elements are oriented in the same direction.

10. A laminated core manufacturing apparatus for a rotating electrical machine, wherein the rotating electrical machine comprises:

the laminated core manufacturing apparatus for a rotating electrical machine is characterized by comprising a punching mechanism,

the punching mechanism punches the plate-shaped stator core elements at a time in a plurality of punching steps in a second region of the strip-shaped magnetic steel sheet on the inner side of the first region where the plate-shaped rotor core elements are punched, before the step of punching the plate-shaped rotor core elements from the strip-shaped magnetic steel sheet formed by rolling.

11. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

includes plate-shaped stator core member storage chambers each of which is stored in a direction perpendicular to a feeding direction of the strip-shaped electromagnetic steel sheet each time the plate-shaped stator core member is blanked from the strip-shaped electromagnetic steel sheet.

12. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

then in the case where a/b is not a natural number,

if the adjacent natural numbers c and d are set as c > a/b > d,

the number of the plate-shaped stator core elements punched by the punching mechanism in the step of punching the plate-shaped stator core elements is set to the natural number c or d.

13. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

in case a/b is a natural number,

when e is set to a natural number e such as a/b,

the number of the plate-shaped stator core elements punched by the punching mechanism in the process of punching the plate-shaped stator core elements is the natural number e.

14. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

in the punching step of the plate-shaped stator core elements, the punching mechanism separates the adjacent plate-shaped stator core elements in the feeding direction of the strip-shaped electromagnetic steel plate by an interval equal to or larger than the width of the plate-shaped stator core elements in the feeding direction of the strip-shaped electromagnetic steel plate.

15. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

in the punching step of the plate-shaped stator core elements, the punching mechanism separates the adjacent plate-shaped stator core elements in a direction perpendicular to a feeding direction of the strip-shaped electromagnetic steel plate by an interval equal to or greater than a width of the plate-shaped stator core elements in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate.

16. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

the number of the plate-shaped stator core members blanked out from the region surrounded by the plate-shaped rotor core members by the punching mechanism is symmetrical with respect to the central axis of the plate-shaped rotor core member parallel to the feed direction of the strip-shaped electromagnetic steel sheet, except for the plate-shaped stator core member blanked out on the central axis of the plate-shaped rotor core member parallel to the feed direction of the strip-shaped electromagnetic steel sheet.

17. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

the number of the plate-shaped stator core members blanked out from the region surrounded by the plate-shaped rotor core members by the punching mechanism is symmetrical with respect to the central axis of the plate-shaped rotor core member perpendicular to the feeding direction of the strip-shaped electromagnetic steel sheet, except for the plate-shaped stator core members blanked out on the central axis of the plate-shaped rotor core member perpendicular to the feeding direction of the strip-shaped electromagnetic steel sheet.

18. The laminated core manufacturing apparatus of a rotating electrical machine according to claim 10,

the respective pole teeth of the plate-shaped stator core elements punched out by the punching mechanism are oriented in the same direction.

19. A rotating electrical machine manufactured by the method of manufacturing a laminated iron core for a rotating electrical machine according to any one of claims 1 to 9,

the strip-shaped electromagnetic steel sheets of the stator core members arranged in the circumferential direction are oriented in the same direction.