CN112217350B - Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine - Google Patents

Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine Download PDF

Info

Publication number
CN112217350B
CN112217350B CN202010646002.3A CN202010646002A CN112217350B CN 112217350 B CN112217350 B CN 112217350B CN 202010646002 A CN202010646002 A CN 202010646002A CN 112217350 B CN112217350 B CN 112217350B
Authority
CN
China
Prior art keywords
plate
stator core
shaped
core elements
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010646002.3A
Other languages
Chinese (zh)
Other versions
CN112217350A (en
Inventor
吉冈翔太
中野圣士
中野正嗣
小塚健太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of CN112217350A publication Critical patent/CN112217350A/en
Application granted granted Critical
Publication of CN112217350B publication Critical patent/CN112217350B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/026—Wound cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Provided are a laminated core manufacturing method for a rotating electrical machine, a laminated core manufacturing apparatus, and a rotating electrical machine, which can realize efficient manufacturing by punching a plurality of plate-shaped stator core elements simultaneously with high precision in one step. In a method for manufacturing a laminated core of a rotating electrical machine, a plurality of plate-shaped stator core elements (11) are punched each time in a plurality of punching steps in a second region (42) of a strip-shaped electromagnetic steel plate (4) that is further inside than a first region (41) of the plate-shaped rotor core element (21) that is punched out, before a step of punching the plate-shaped rotor core element (21) from the strip-shaped electromagnetic steel plate (4) formed by rolling by a punching mechanism (55).

Description

Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine
Technical Field
The present application relates to a method for manufacturing a laminated core of a rotating electrical machine, a laminated core manufacturing apparatus, and a rotating electrical machine.
Background
As a conventional method (common material taking) for taking out a rotor core and a stator core from the same steel sheet with good yield, the following method is disclosed. Patent document 1 discloses a common material taking method of punching a plurality of stator cores from inside a rotor core.
Patent document 2 discloses a common material taking method of punching a plurality of stator cores from an outer shape portion of a rotor core, which improves yield as compared with patent document 1.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2002-186227
Patent document 2: japanese patent laid-open No. 2013-226013
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 performed in a plurality of steps in consideration of punching accuracy and die life. However, an efficient manufacturing method of simultaneously punching out a plurality of plate-like stator core elements with high accuracy through one process is not disclosed nor suggested.
Disclosure of Invention
The present application has been made in view of the above-described circumstances, and an object thereof is to enable efficient production of a plurality of plate-shaped stator core elements by punching out the elements simultaneously and with high precision in one step.
The application discloses a method for manufacturing a laminated iron core of a rotating electrical machine, which comprises the following steps: a stator core configured by connecting stator core element lamination blocks, which are configured by laminating plate-shaped stator core elements formed in a T-shape by pole tooth portions and core back portions in an axial direction, in a ring shape in a circumferential direction; and a rotor core that is configured by stacking annular plate-shaped rotor core elements in an axial direction and that is surrounded by the stator core, wherein, prior to a step of punching 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 each time by a plurality of steps in a second region of the strip-shaped electromagnetic steel plate that is further inside than a first region of punching the plate-shaped rotor core elements.
In the method for manufacturing a laminated core of a rotating electrical machine according to the present application, the rotating electrical machine includes: a stator core configured by connecting stator core element lamination blocks, which are configured by laminating plate-shaped stator core elements formed in a T-shape by pole tooth portions and core back portions in an axial direction, in a ring shape in a circumferential direction; and a rotor core portion that is configured by stacking annular plate-shaped rotor core elements in an axial direction and that is surrounded by the stator core portion, wherein in the laminated core manufacturing method, a plurality of plate-shaped stator core elements are punched each time by a plurality of punching steps in a second region of a strip-shaped electromagnetic steel plate that is further inside than a first region of punching the plate-shaped rotor core elements, before a step of punching the plate-shaped rotor core elements from the strip-shaped electromagnetic steel plate formed by rolling by a punching mechanism, and therefore, efficient manufacturing in which a plurality of plate-shaped stator core elements are punched simultaneously with high precision in each of the plurality of punching steps can be achieved.
Drawings
Fig. 1 is a diagram showing embodiment 1 of the present application, which is a plan view showing an example of a rotating electrical machine that is an object of a laminated core manufacturing method and a laminated core manufacturing apparatus for a rotating electrical machine.
Fig. 2 is a diagram showing embodiment 1 of the present application, which is a plan view illustrating a concept of a laminated core manufacturing method.
Fig. 3 is a diagram 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, which is a perspective view showing an example of a laminated block of stator core elements.
Fig. 5 is a front view schematically illustrating a laminated core manufacturing apparatus according to embodiment 1 of the present application.
Fig. 6 is a diagram showing embodiment 1 of the present application, and is a plan view schematically illustrating a laminated core manufacturing apparatus.
Fig. 7 is a diagram showing embodiment 1 of the present application, which is a plan view for explaining a method of punching a plurality of plate-shaped stator core elements each time in a plurality of punching steps.
Fig. 8 is a diagram showing embodiment 2 of the present application, which is a plan view illustrating a concept of a laminated core manufacturing method.
Fig. 9 is a diagram showing embodiment 2 of the present application, which is a plan view for explaining a method of punching a plurality of plate-shaped stator core elements each time in a plurality of punching steps.
Fig. 10 is a diagram showing embodiment 3 of the present application, which is a plan view illustrating a concept of a laminated core manufacturing method.
Fig. 11 is a diagram showing embodiment 3 of the present application, which is a plan view for explaining a method of punching a plurality of plate-shaped stator core elements each time in a plurality of punching steps.
Fig. 12 is a plan view of a stator core illustrating features of the stator core according to the manufacturing method of embodiments 1 to 3 of the present application.
Fig. 13 is a plan view of a stator core illustrating other features of the stator core of the present application.
(symbol description)
1 a stator core; 11 plate-like stator core elements; 11T pole tooth; 11CB core back; 11LB stator core component lamination blocks; 12 a frame; 2 rotor core; 21 plate-like rotor core elements; 211 holes for magnets; 3, rotating shaft; 4, a strip-shaped electromagnetic steel plate; 41 a first region; 42 a second region; a4, the feeding direction of the strip electromagnetic steel plate; 5 manufacturing devices; 50 a belt-shaped electromagnetic steel plate planarization mechanism; 501 outer guide pins; 502 inner guide pins; 51 a first stamping mechanism; 511 a first plate-like stator core element blanking male die; 512 first plate-like stator core element blanking die; 513 a first plate-shaped stator core component storage compartment; 514 a first stator core element stack exhaust port; 52 a second stamping mechanism; 521 a second plate-like stator core element blanking male die; 522 blanking a female die from the second plate-like stator core element; 523 a second plate-like stator core element storage compartment; 524 second stator core element lamination block discharge outlet; 53 a third stamping mechanism; 531 a third plate-like stator core component blanking male die; 532 third plate-shaped stator core element blanking die; 533 a third plate-shaped stator core element storage compartment; 534 a third stator core component lamination block ejection port; 54 a fourth stamping mechanism; 541 fourth plate-like stator core element blanking male dies; 542 fourth plate-like stator core element blanking dies; 543 fourth plate-like stator core element storage chamber; 544 fourth stator core element lamination block discharge outlet; 55 a fifth stamping mechanism; 551 fifth plate rotor core element blanking male die; 552 a fifth plate-like rotor core element blanking die; 553 a fifth plate-like rotor core element storage compartment; 554 rotor core component stack exhaust; 56 a scrap cutting mechanism; 561 electromagnetic steel plate scrap cuts off the male die; 562 cutting off the female die from the scrap electromagnetic steel plate; 563 cut off the electrical steel sheet scrap storage compartment; 564 cut off the electromagnetic steel sheet waste discharge port; A4M strip electromagnetic steel plate rolling direction; t (T) 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 1-10 Blanking an object of the plate-shaped stator core element; t (T) 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 2-18 Blanking an object of the plate-shaped stator core element; t (T) 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 3-12 The plate-shaped stator core element blanks the object.
Detailed Description
Hereinafter, 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 application will be described with reference to the accompanying drawings. The present application is not limited to the following description, and can be appropriately modified within a range not departing from the gist of the present application. In the drawings shown below, for convenience of understanding, the proportional dimensions of the respective components may be different from actual ones, or a structure not related to the features of the present application may be omitted.
Embodiment 1
Hereinafter, a laminated core manufacturing method and a laminated core manufacturing apparatus for a rotary electric machine, and embodiment 1 of a rotary electric 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 electrical machine, which is a method and an apparatus for manufacturing a laminated core of the rotating electrical 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 for 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 illustrating a stator core illustrating features of a stator core.
As an example illustrated in fig. 1, 3, and 4, a laminated core manufacturing method and a laminated core manufacturing apparatus for a rotary electric machine include: a stator core configured by connecting stator core element lamination blocks 11LB (see fig. 4) in a circumferential direction as illustrated in fig. 1, wherein the stator core element lamination blocks 11LB are configured by laminating plate-shaped stator core elements 11 (see fig. 3) in a T-shape formed by pole tooth portions 11T and core back portions 11CB in an axial direction of a rotating shaft 3; and a rotor core that is constituted by laminating annular plate-like rotor core elements 21 in the axial direction, and that is surrounded by the stator core.
The stator core element lamination block 11LB groups connected in a circumferential direction in an annular shape are strongly fitted into the inner periphery of the annular frame 12. By the above-described strong insertion, the stator core element lamination block 11LB groups connected in the circumferential direction in an annular state, that is, the state of fig. 1 is maintained.
As shown in fig. 2, in the method for manufacturing the laminated core of the rotating electrical machine, before the sheet-shaped electromagnetic steel sheet raw material ingot is punched by a rolling roller (not shown) to punch the sheet-shaped rotor core element 21 from the first region of the sheet-shaped electromagnetic steel sheet 4 formed by rolling in the sheet-shaped electromagnetic steel sheet rolling direction A4M by the punching mechanism, the sheet-shaped stator core elements 11, … (10 in the example of fig. 2) which are connected in the circumferential direction in a ring shape are sequentially punched by the punching mechanism in a plurality of steps in each step, not in a one-step manner, in a manner of being spaced apart from each other from the second region 42 on the inner side of the first region. Specifically, fig. 5 and 6, which exemplify the manufacturing apparatus 5, and fig. 7, which illustrates a method of punching a plurality of plate-shaped stator core elements each time in a plurality of punching steps, will be described in detail below.
When the strip-shaped electromagnetic steel sheet 4 formed by rolling in the rolling direction A4M (hereinafter, also referred to as "strip-shaped electromagnetic steel sheet rolling direction") is fed to the manufacturing apparatus 5 in the arrow A4 direction (hereinafter, also referred to as "strip-shaped electromagnetic steel sheet feeding direction"), first, irregular bending, deflection, or the like of the strip-shaped electromagnetic steel sheet 4 is flattened by the strip-shaped electromagnetic steel sheet flattening mechanism 50.
Specifically, the outer guide pins 501 are inserted into the punched areas of the plate-like rotor core member 21 of the strip-shaped electromagnetic steel plate 4, that is, the four corners outside the first area 41, by the strip-shaped electromagnetic steel plate flattening mechanism 50 to apply tension to the strip-shaped electromagnetic steel plate 4 at the four corners of the area 41, so that the area (including the second area 42) surrounded by the outer guide pins 501 at the four corners of the strip-shaped electromagnetic steel plate 4 is flattened.
Further, at any of a plurality of places in the second region 42 (region surrounded by the region where the plate-shaped rotor core element 21 is punched) of the strip-shaped electromagnetic steel plate 4, the inner guide pin 502 is inserted through the strip-shaped electromagnetic steel plate flattening mechanism 50 at a position not overlapping the punched portion of the plate-shaped stator core element 11. By the insertion of the inner guide pins 502 into the strip-shaped electromagnetic steel sheet 4, occurrence of warping in the second region 42 of the strip-shaped electromagnetic steel sheet 4 caused by punching of the punching mechanism of the plate-shaped stator core element 11 is suppressed.
In the manufacturing apparatus 5, from the strip-shaped electromagnetic steel sheet flattening mechanism 50, a first press mechanism 51 is disposed on the downstream side in the feeding direction A4 of the strip-shaped electromagnetic steel sheet 4, a second press mechanism 52 is disposed on the downstream side of the first press mechanism 51, a third press mechanism 53 is disposed on the downstream side of the second press mechanism 52, a fourth press mechanism 54 is disposed on the downstream side of the third press mechanism 53, a fifth press mechanism 55 is disposed on the downstream side of the fourth press mechanism 54, and a scrap cutting mechanism 56 is disposed on the downstream side of the fifth press mechanism 55.
The first punching mechanism 51 has a plurality of (3 in this embodiment 1) first plate-shaped stator core element punching male dies 511, and has first plate-shaped stator core element punching female dies 512 formed in the form corresponding to the first plate-shaped stator core element punching male dies 511.
The first plate-shaped stator core element punching male die 511 cooperates with the first plate-shaped stator core element punching female die 512 by a punching action of the first plate-shaped stator core element punching male die 511 to punch the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plate 4.
A first plate-shaped stator core element storage chamber 513 and a plurality of first stator core element lamination block discharge ports 514 are provided corresponding to each of the plurality of first plate-shaped stator core element blanking female dies 512.
The second punching mechanism 52 has a plurality (2 in this embodiment 1) of 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 corresponding to the second plate-shaped stator core element punching male dies 521.
The second plate-shaped stator core element punching male die 521 cooperates with the second plate-shaped stator core element punching female die 522 by the punching action of the second plate-shaped stator core element punching male die 521 to punch the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plate 4.
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 corresponding to each of the plurality of second plate-shaped stator core element blanking female dies 522.
The third punching mechanism 53 has a plurality (3 in this embodiment 1) of 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.
The third plate-shaped stator core element punching male die 531 is caused to cooperate with the third plate-shaped stator core element punching female die 532 by the punching action of the third plate-shaped stator core element punching male die 531 to punch the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plate 4.
A third plate-shaped stator core element storage chamber 533, a plurality of third stator core element lamination block discharge ports 534 are provided corresponding to each of the plurality of third plate-shaped stator core element blanking female dies 532, respectively.
The fourth punching mechanism 54 has a plurality (2 in this embodiment 1) of fourth plate-shaped stator core element punching male dies 541, and has fourth plate-shaped stator core element punching female dies 542 formed in the die plate corresponding to the fourth plate-shaped stator core element punching male dies 541.
The fourth plate-shaped stator core element-punching male die 541 is caused to cooperate with the fourth plate-shaped stator core element-punching female die 542 by a punching action of the fourth plate-shaped stator core element-punching male die 541 to punch the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel plate 4.
A fourth plate-shaped stator core element reservoir 543 and a plurality of fourth stator core element lamination block discharge ports 544 are provided for each of the plurality of fourth plate-shaped stator core element blanking dies 542.
The fifth punching mechanism 55 has a fifth plate-shaped rotor core element punching male die 551, and has a fifth plate-shaped rotor core element punching female die 552 formed on the die plate in correspondence with the fifth plate-shaped rotor core element punching male die 551.
The fifth plate-shaped rotor core element-punching male die 551 cooperates with the fifth plate-shaped rotor core element-punching female die 552 by the punching action of the fifth plate-shaped rotor core element-punching male die 551 to punch the plate-shaped rotor core element 21 from the strip-shaped electromagnetic steel plate 4.
A fifth plate-shaped rotor core element storage chamber 553 and a rotor core element lamination block discharge port 554 are provided corresponding to the fifth plate-shaped rotor core element punching female die 552, respectively.
When the punching of the first to fifth punching mechanisms 51 to 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, operations of punching a plurality of plate-shaped stator core elements each time in a plurality of punching steps in a second region of the strip-shaped electromagnetic steel plate that is further inside than a first region of the strip-shaped electromagnetic steel plate in which the plate-shaped rotor core elements are punched, before the step of punching the plate-shaped rotor core elements from the strip-shaped electromagnetic steel plate formed by rolling, by a punching mechanism, will be described in order by punching steps with reference to fig. 7 and 5.
As illustrated in fig. 7, in the first blanking process, three plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 are blanked by the first pressing mechanism 51 of fig. 5 and 6 in the second region 42 1-1 、T 1-2 、T 1-3 The strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4 and is fed toward the second blanking process of the next process.
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 blanking process, two plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 are blanked by the second pressing mechanism 52 of fig. 5 and 6 in the second region 42 1-4 、T 1-5 The strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4, and is fed toward the third blanking process of the next process.
The two plate-shaped stator core elements 11 punched 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 blanking process, three plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 are blanked by the third punching mechanism 53 of fig. 5 and 6 in the second region 42 1-6 、T 1-7 、T 1-8 The strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4, and is fed in the fourth blanking process of the next process.
The three plate-shaped stator core elements 11 blanked in the third blanking 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 blanking process, two plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 are blanked by the fourth pressing mechanism 54 of fig. 5 and 6 in the second region 42 1-9 、T 1-10 The strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped electromagnetic steel sheet feeding direction A4, and is fed in the fifth blanking process of the next process.
The two plate-shaped stator core elements 11 punched in the fourth punching process are individually stored in the two second plate-shaped stator core element storage chambers 543, 543 of the manufacturing device 5 of fig. 5 and 6.
At the blanking end time point of the fourth blanking process, all of the plate-shaped stator core elements 11, … 11 (10 plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 in the second region 42) used for the plate-shaped rotor core element 21 in the rotary electric machine assembly are blanked 1-1 To T 1-10 And a plate-like fixed core element formed).
In the first to fourth blanking steps, all the plate-shaped stator core elements 11 … 11 (10 plate-shaped stator core element blanking targets T of the strip-shaped electromagnetic steel plate 4 are blanked in the second region 42) used in the rotary electric machine assembly with respect to the plate-shaped rotor core element 21 are blanked from the second region 42 1-1 To T 1-10 And the formed plate-shaped stator core element) is 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 process is completed, the strip-shaped electromagnetic steel sheet 4 is fed in the strip-shaped steel sheet feeding direction A4, and the area in which the blanking is performed in the first blanking process is moved to the second blanking process to perform the blanking in the second blanking process, but the strip-shaped electromagnetic steel sheet 4 which is not blanked in the first blanking process is fed to perform the blanking in the first blanking process during the blanking in the second blanking process. In the same manner, in the blanking period in which the fifth blanking process is performed, blanking in the first blanking process, the second blanking process, the third blanking process, and the fourth blanking process are performed.
As described above, when the first pressing mechanism 51, the second pressing mechanism 52, the third pressing mechanism 53, the fourth pressing mechanism 54, and the fifth pressing mechanism 55 are continuously operated, and a predetermined number of plate-shaped stator core elements 11 are stored in the corresponding first plate-shaped stator core element storage chamber 513, second plate-shaped stator core element storage chamber 523, third plate-shaped stator core element storage chamber 533, and fourth plate-shaped stator core element storage chamber 543, the plate-shaped stator core elements 11 stored in the predetermined number are automatically extruded from the first plate-shaped stator core element storage chamber 513, second plate-shaped stator core element storage chamber 523, third plate-shaped stator core element storage chamber 533, and fourth plate-shaped stator core element storage chamber 543 by the extrusion mechanism inside the manufacturing apparatus 5, and are discharged from the first stator core element lamination block discharge port 514, second stator core element lamination block discharge port 524, third stator core element lamination block discharge port 534, and fourth stator core element lamination block discharge port 544 (see fig. 4).
Similarly, when a predetermined number of plate-shaped rotor core elements 21 are stored in the plate-shaped rotor core element storage chamber 553, the plate-shaped rotor core elements 21 stored in the predetermined number of plate-shaped rotor core element storage chamber 553 are automatically extruded by the extrusion mechanism inside the manufacturing apparatus 5, and discharged from the rotor core element lamination block discharge port 554.
As described above, in embodiment 1, a method for manufacturing a laminated core of a rotating electrical machine having: a stator core 1, wherein the stator core 1 is formed by connecting stator core element lamination blocks 11LB in a ring shape along the circumferential direction of the rotating electrical machine, and the stator core element lamination blocks 11LB are formed by laminating plate-shaped stator core elements 11 formed in a T shape by pole tooth portions 11T and core back portions 11CB in the axial direction of the rotating electrical machine; and a rotor core 2, the rotor core 2 being configured by laminating annular plate-shaped rotor core elements 21 in an axial direction of a rotary electric machine, and the rotor core 2 being surrounded by the stator core 1, in a laminated core manufacturing method of the rotary electric machine, before a step of punching the plate-shaped rotor core elements 21 from a strip-shaped electromagnetic steel plate 4 formed by rolling by a punching mechanism 55 (a fifth punching step in this embodiment), a plurality of plate-shaped stator core elements 11 are punched in each punching step by a plurality of punching steps (first punching step to fourth punching step in this embodiment) in a second region 42 of the strip-shaped electromagnetic steel plate 4 which is further inside than a first region 41 in which the plate-shaped rotor core elements 21 are punched.
In the present embodiment, as illustrated in fig. 2 and 7, the two plate-shaped rotor core element blanking objects T are blanked on the central axis CH21 of the blanking object of the plate-shaped rotor core element 21 parallel to the rolling press conveying direction A5 (i.e., the strip-shaped electromagnetic steel plate rolling direction A4M, that is, the strip-shaped electromagnetic steel plate feeding direction A4) except for 1-2 、T 1-7 In addition, the number of plate-shaped stator core element blanking objects for blanking the plate-shaped stator core elements out of the 10 plate-shaped stator core elements 11 is symmetrical with the central axis CH21 of the blanking object of the plate-shaped rotor core element 21 parallel to the rolling press conveying direction A5 (i.e., the strip-shaped electromagnetic steel plate rolling direction A4M, that is, 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 press conveying direction A5 (i.e., the strip-shaped electromagnetic steel plate rolling direction A4M, that is, the strip-shaped electromagnetic steel plate feeding direction A4), respectively, and therefore, when blanking the plate-shaped stator core element blanking object in the second region 42 surrounded by the region of the plate-shaped electromagnetic steel plate 21 from the strip-shaped electromagnetic steel plate 4, that is, the first region 41, is, the punching pressure of the male die that is applied to the plate-shaped stator core element blanking of the second region 42 of the strip-shaped electromagnetic steel plate 4 is uniformly dispersed, and therefore, the dimensional accuracy of each plate-shaped stator core element 11 is improved.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all the same direction, that is, the radial direction as illustrated in fig. 12, it is possible to reduce cogging torque or torque pulse caused by the difference in magnetic anisotropy due to the difference in angle between the strip-shaped electromagnetic steel plate rolling directions A4 of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all the same direction, that is, the radial direction as illustrated in fig. 12, the directions of the magnetic fluxes passing through the respective plate-shaped stator core elements 11 at the time of the rotating electrical machine operation are the same as the strip-shaped electromagnetic steel plate rolling directions A4M, and therefore, since the magnetic characteristics in the strip-shaped electromagnetic steel plate rolling directions A4M are good, the effect of the rotating electrical machine capable of realizing high torque can be obtained.
In the present embodiment, as shown in fig. 7, 10 plate-shaped stator core elements 11 are produced four times in the first to fourth blanking processes. In each of the first to fourth blanking steps, the number of the blanked plate-shaped stator core elements 11 is 3, 2, and the plurality of the plate-shaped stator core elements 11 is not blanked simultaneously in the direction A6 perpendicular to the feeding direction A4 of the strip-shaped electromagnetic steel sheet (the direction A5 parallel to the feeding direction A4 of the strip-shaped electromagnetic steel sheet). Accordingly, as illustrated in fig. 7, the blanking objects T of the respective plate-shaped stator core elements are 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 1-10 The plate-shaped stator core elements thus manufactured are not mixed up with each other as indicated by arrow D13, but are individually accumulated in each of the corresponding plate-shaped stator core element storage chambers 513, 523, 533, 543, and therefore the stator core element lamination blocks 11LB of the plate-shaped stator core elements manufactured in the first to fourth punching steps are not mixed up with each other, but are stacked up from the first stator core element lamination block of the manufacturing apparatus 5The discharge ports 514, 524, 534, and 544 are taken out, and the method for recovering the stator core component lamination block 11LB is easy, and the production efficiency is improved.
In each of the first to fourth blanking steps, as illustrated in fig. 6 and 7, adjacent plate-shaped stator core element blanking targets are spaced apart by a distance L16 equal to or larger than the plate-shaped stator core element width L14 (see fig. 3) of the strip-shaped electromagnetic steel plate in the strip-shaped electromagnetic steel plate feeding direction A4 and by a distance L17 equal to or larger than the plate-shaped stator core element width L15 (see fig. 3) of the strip-shaped electromagnetic steel plate in the direction perpendicular to the strip-shaped electromagnetic steel plate feeding direction A4 in the strip-shaped electromagnetic steel plate feeding direction A4, and therefore, the die plate receiving the punching load by the punching mechanism can be kept rigid, and therefore, the dimensional accuracy of each plate-shaped stator core element 11 constituting the stator core element laminated block 11LB (see fig. 4) can be further improved.
The number of plate-like stator core elements 11 punched by the punching process can be generalized in the following manner. That is, if the number of plate-shaped stator core elements 11 punched out of the inner side of the plate-shaped rotor core element 21 is set to a natural number a and the number of punching steps for punching out the plate-shaped stator core elements 11 is set to a natural number b, if a/b is not a natural number, then the number of plate-shaped stator core elements 11 punched out in the punching process of the plate-shaped stator core elements 11 can be represented by the natural number c or d if adjacent natural numbers c and d are set such that c > a/b > d.
The present application is further effective in a large-diameter permanent magnet embedded motor. As an example of application of a motor having a large diameter and embedded permanent magnets, there is a hybrid system in which a motor is disposed between an engine and a transmission of an automobile, the engine is started by using the motor, kinetic energy of the automobile is regenerated into electric energy by generating electric power, or torque is generated to assist the engine. In such an application example, the motor efficiency is strictly required to be low in vibration and noise. In the large-diameter motor, if the inner region (second region 42) of the punched plate-like rotor core member in the strip-like 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, the dimensional accuracy can be improved as compared with the conventional one. Further, since the accuracy of the stator core is also improved, vibration and noise of the motor due to deterioration of the shape accuracy can be suppressed.
In embodiment 1, since the orientation of each pole tooth of the plate-shaped stator core element of the split core is the same as the rolling direction A4M (see fig. 7 and 12), it is possible to reduce the difference in magnetic anisotropy caused by the difference in angle between the plate-shaped stator core element and the direction orthogonal to the rolling direction of each pole tooth, and the cogging torque or torque pulse caused by the difference. Furthermore, there are the following effects: the electromagnetic excitation force with low space dimension can be reduced by the magnetic anisotropy energy, so that the motor can be reduced in vibration and noise. In particular, the so-called "magnet embedded motor" in which permanent magnets are embedded in the core of the rotor has a technical problem of reduction in vibration and noise, and therefore, the structure of the present application is effective. Since a direction having good magnetic characteristics can be used, the torque of the motor can be improved, and the efficiency can be improved.
Although the permanent magnet embedded motor has been described herein, it is needless to say that similar effects can be obtained even in other motor systems such as a surface magnet type motor.
In addition, in embodiment 1, in the example of fig. 5 and 6, as the punching means for punching the plate-shaped stator core element 11 from the strip-shaped electromagnetic steel sheet 4 and as the punching means for punching the plate-shaped rotor core element 21 from the strip-shaped electromagnetic steel sheet 4, the first punching means 51, the second punching means 52, the third punching means 53, the fourth punching means 54, and the fifth punching means 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 stator core element punching female die 512, the second plate-shaped stator core element punching female die 522, the third plate-shaped stator core element female die 532, the fourth plate-shaped stator core element punching female die 542, the fifth core element punching female die 552 may be arranged in one punching means, and the first stator core element punching male die 511, the second core element punching male die 521, the fourth core element punching male die 551, and the fourth core element punching male die 551 may be staggered in time. In the above case, one press mechanism may be moved in the feeding direction A4 of the strip electromagnetic steel sheet, and the first to fifth blanking steps may be performed.
In the stator core element lamination block 11LB configured by laminating the plate-shaped stator core elements 11 in the axial direction of the rotating electrical machine, the lamination state of the plate-shaped stator core elements 11 of the stator core element lamination block 11LB taken out from the discharge ports 514, 524 … of the manufacturing apparatus 5 is made less likely to collapse by caulking each of the laminated plate-shaped stator core elements 11 in the step preceding the first punching step.
Further, although fig. 12 illustrates the case where the directions of the strip-shaped magnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electric machine are the same as the radial direction of the rotating electric machine, as illustrated in fig. 13, the directions of the strip-shaped magnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electric machine may be the same as the circumferential direction of the rotating electric machine, and the corresponding effects can be achieved if the directions of the strip-shaped magnetic steel sheet rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electric machine are the same.
Embodiment 2
Embodiment 2 is also similar to embodiment 1 described above, and as illustrated in fig. 8 and 9, the plate-shaped rotor core member 21 is taken out of the same electromagnetic steel plate 4, and the plate-shaped stator core member 11 is taken out of the region surrounded by the plate-shaped rotor core member 21. The rotor core 2 is provided with a magnet hole 211 for embedding a permanent magnet therein. Riveting for fixing each plate-shaped stator core element 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-like stator core elements 11 are punched out of a strip-shaped electromagnetic steel plate 4. Except for two plate-shaped stator core element blanking objects T blanked on a central axis CV21 of a plate-shaped rotor core element 21 perpendicular to a strip-shaped electromagnetic steel sheet feeding direction A4 2-3 、T 2-12 In addition, since the number of punched out plate-like stator core elements 11 is symmetrical with respect to the central axis CH21 of the plate-like rotor core element 21 parallel to the feeding direction A4 of the strip-like electromagnetic steel sheet and the central axis CV21 of the plate-like rotor core element 21 perpendicular to the plate-like rotor core element 21, respectively, the punching pressure applied to the plate-like stator core element 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-like stator core elements 11 is improved.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all the same direction, that is, the radial direction as illustrated in fig. 12, the directions of the magnetic fluxes passing through the respective plate-shaped stator core elements 11 at the time of the rotating electrical machine operation are the same as the directions of the strip-shaped electromagnetic steel plate rolling directions A4M, and therefore, since the magnetic characteristics of the strip-shaped electromagnetic steel plate rolling directions A4M are good, the effect of the rotating electrical machine capable of realizing high torque 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 blanking steps. In each blanking process, the number of the blanked plate-shaped stator core elements 11 is 5, 4, respectively, and the plate-shaped stator core elements 11 are blanked simultaneously in a direction A6 perpendicular to the strip-shaped electromagnetic steel sheet rolling direction A4M (a direction A5 parallel to the strip-shaped electromagnetic steel sheet feeding direction A4). Thus, as illustrated in FIG. 7As shown, the blanking object T for blanking each plate-shaped stator core element 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 2-18 In contrast, since the manufactured plate-shaped stator core components are not mixed up with each other as indicated by arrow D13 and are accumulated in each of the corresponding plate-shaped stator core component storage chambers 513, 523, 533, 543 (see fig. 5), the stator core component laminated block 11LB of the plate-shaped stator core components manufactured in the first to fourth punching steps is not mixed up with each other and is extracted from the respective discharge ports of the first, second, third, and fourth stator core component laminated block discharge ports 514, 524, 534, and 544 of the manufacturing apparatus 5, and the method for recovering the stator core component laminated block 11LB is facilitated, and the production efficiency is improved.
In addition, as in the case of embodiment 1 described above, in each of the first to fourth blanking steps, the adjacent plate-shaped stator core element blanking objects are separated by the interval L16 (see fig. 7) of the plate-shaped stator core element width L14 (see fig. 3) of the strip-shaped electromagnetic steel sheet feeding direction A4 in the strip-shaped electromagnetic steel sheet feeding direction A4 and by the interval L17 (see fig. 7) of the plate-shaped stator core element width L15 (see fig. 3) of the direction perpendicular to the strip-shaped electromagnetic steel sheet feeding direction A4 in the direction perpendicular to the strip-shaped electromagnetic steel sheet feeding direction A4, and therefore, the die plate receiving the punching load by the punching mechanism can be kept rigid, and therefore, the dimensional accuracy of each plate-shaped stator core element 11 constituting the stator core element laminated block 11LB (see fig. 4) can be further improved.
Embodiment 3
Embodiment 3 is also similar to embodiments 1 and 2 described above, and as illustrated in fig. 10 and 11, plate-shaped rotor core elements 21 are taken out of the same electromagnetic steel plate 4, and plate-shaped stator core elements 11 are taken out of the region surrounded by the plate-shaped rotor core elements 21. The rotor core 2 is provided with a magnet hole 211 for embedding a permanent magnet therein. Riveting for fixing each plate-shaped stator core element 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-like stator core elements 11 are punched out of a strip-shaped electromagnetic steel plate 4. Except for two plate-shaped stator core element blanking objects T blanked on a central axis CV21 of a plate-shaped rotor core element 21 perpendicular to a strip-shaped electromagnetic steel sheet feeding direction A4 3-2 、T 3-5 In addition, since the number of punched out plate-like stator core elements 11 is symmetrical with respect to the central axis CH21 of the plate-like rotor core element 21 parallel to the feeding direction A4 of the strip-like electromagnetic steel sheet and the central axis CV21 of the plate-like rotor core element 21 perpendicular to the plate-like rotor core element 21, respectively, the punching pressure applied to the plate-like stator core element 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-like stator core elements 11 is improved.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all the same direction, that is, the radial direction as illustrated in fig. 12, it is possible to reduce the difference in magnetic anisotropy caused by the difference in angle in the direction orthogonal to the strip-shaped electromagnetic steel plate rolling direction A4 of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine and the cogging torque or torque pulse caused by the difference.
Further, since the directions of the strip-shaped electromagnetic steel plate rolling directions A4M of the plate-shaped stator core elements 11 arranged in the circumferential direction of the rotating electrical machine are all the same direction, that is, the radial direction as illustrated in fig. 12, the directions of the magnetic fluxes passing through the respective plate-shaped stator core elements 11 at the time of the rotating electrical machine operation are the same as the directions of the strip-shaped electromagnetic steel plate rolling directions A4M, and therefore, since the magnetic characteristics of the strip-shaped electromagnetic steel plate rolling directions A4M are good, the effect of the rotating electrical machine capable of realizing high torque can be obtained.
In the present embodiment3, as illustrated in fig. 11, 12 plate-shaped stator core elements 11 are produced four times in the first to fourth blanking processes. In each punching step, the number of the plate-shaped stator core elements 11 to be punched is 3, and the plate-shaped stator core elements 11 are not punched simultaneously in the direction A6 perpendicular to the strip-shaped electromagnetic steel plate rolling direction A4M (the direction A5 parallel to the strip-shaped electromagnetic steel plate feeding direction A4), and therefore, as illustrated in fig. 11, each plate-shaped stator core element punching object T is 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 3-12 In contrast, since the manufactured plate-shaped stator core elements are not mixed up with each other as indicated by the arrow D13 and are accumulated in each of the corresponding plate-shaped stator core element storage chambers 513, 523, 533, 543 (see fig. 5), the stator core element laminated block 11LB of the plate-shaped stator core element manufactured in the first to fourth punching steps is not mixed up with each other and is extracted from the respective discharge ports of the first, second, third, and fourth stator core element laminated block discharge ports 514, 524, 534, and 544 of the manufacturing apparatus 5, and the method for recovering the stator core element laminated block 11LB is facilitated, thereby improving the production efficiency.
Further, as in embodiment 3, in each blanking process, the number of the blanked plate-shaped stator core elements 11 is made as uniform as possible to disperse the load applied to the plate-shaped stator core elements 11, thereby further improving the dimensional accuracy.
In the case of 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,
if the number of plate-like stator core elements 11 punched out inside the plate-like rotor core elements 21 is set to the natural number a,
the number of blanking steps for blanking the plate-like stator core element 11 is set to a natural number b,
in case a/b is a natural number,
if a natural number e such as e=a/b is set,
the number of plate-shaped stator core elements 11 punched in the punching process of the plate-shaped stator core elements 11 can be expressed by a natural number e.
The number of blanking is made as uniform as possible in each blanking process to disperse the pressing load applied to the stator core 1, thereby further improving the dimensional accuracy.
When the viewpoint is changed, the following features are present in the foregoing embodiments 1 to 3.
Characteristic item 1:
A method for manufacturing a laminated core, wherein,
the laminated core is manufactured by laminating punched electromagnetic steel plates,
in the method of manufacturing the 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 a plurality of steps of punching out the stator cores, a plurality of stator cores are punched out simultaneously 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 feature item 1, in the manufacturing method of the laminated core,
in each step of punching out the stator core, the punched out stator core is discharged in a direction perpendicular to the die conveying direction in a non-confusing manner.
The method of recovering the laminated core is easy, and therefore, there is an effect that the production efficiency is further improved.
Characteristic item 3:
in addition to the manufacturing method of feature item 1, in the manufacturing method of the laminated core,
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 set to a natural number a,
The number of steps for punching out the stator core is set to a natural number b,
in case a/b is not a natural number,
if the adjacent natural numbers c, d are set such that c > a/b > d,
the number of stator cores punched in the process of punching out the stator cores can be expressed by a natural number c or d,
the number of punched holes is made as uniform as possible in each step of punching the stator core to disperse the pressure applied to the stator core, thereby further improving the dimensional accuracy.
Characteristic item 4:
in addition to the manufacturing method of feature item 1, in the manufacturing method of the laminated core,
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 set to a natural number a,
the number of steps for punching out the stator core is set to a natural number b,
in case a/b is a natural number,
if a natural number e such as e=a/b is set,
the number of stator cores blanked in the process of blanking the stator cores can be expressed by a natural number e,
the number of punched holes is made as uniform as possible in each process of punching out the stator core to disperse the pressure applied to the stator core, thereby having an effect that dimensional accuracy is further improved.
Feature item 5:
in the manufacturing method of the laminated core portion having the pole tooth shape in addition to the manufacturing method of the feature item 1,
in the step of punching out the stator cores, adjacent stator cores are separated in the punching-out conveying direction by an interval equal to or greater than the width of the pole teeth in the punching-out conveying direction,
when stator cores are punched simultaneously, the interval between adjacent stator cores can be maintained, and therefore, the dimensional accuracy of the stator cores is further improved.
Characteristic item 6:
in the manufacturing method of the laminated core portion having the pole tooth shape in addition to the manufacturing method of the feature item 1,
in the step of punching out the stator cores, adjacent stator cores are separated by an interval equal to or greater than the width of the pole teeth in the direction perpendicular to the punching-out conveying direction,
when stator cores are punched simultaneously, the interval between adjacent stator cores can be maintained, and therefore, the dimensional accuracy of the stator cores is further improved.
Characteristic item 7:
in addition to the manufacturing method of feature item 1, in the manufacturing method of the laminated core,
in addition to the number of stator cores punched on the central axis of the rotor core parallel to the punching conveying direction, the number of stator cores taken out from the inside of the rotor core is symmetrical with respect to the central axis of the rotor core parallel to the punching conveying direction,
The stator core is symmetrically arranged to uniformly disperse the pressure applied to the stator core, and thus, there is an effect that dimensional accuracy is further improved.
Feature item 8:
in addition to the manufacturing method of feature item 1, in the manufacturing method of the laminated core,
in addition to the number of stator cores punched on the central axis of the rotor core perpendicular to the punching conveying direction, the number of stator cores taken out from the inside of the rotor core is symmetrical with respect to the central axis of the rotor core perpendicular to the punching conveying direction,
the stator core is symmetrically arranged to uniformly disperse the pressure applied to the stator core, and thus, there is an effect that dimensional accuracy is further improved.
Feature item 9:
in addition to the manufacturing method of feature item 1, in the manufacturing method of the laminated core,
the yoke portions of the stator core are all oriented in the same direction,
the difference in magnetic anisotropy between the rolling direction and the straight direction can be reduced, and the cogging torque and torque pulse caused by the difference can be reduced. Since a direction having good magnetic characteristics can be used, an effect of high torque can be obtained.
Characteristic item 10:
A laminated core manufacturing apparatus, wherein the laminated core is manufactured by laminating blanked electromagnetic steel sheets, has a die in which,
blanking a rotor core and a stator core 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 a plurality of steps of punching out the stator cores, a plurality of stator cores are punched out simultaneously while maintaining a predetermined interval, and therefore, there is an effect that dimensional accuracy is improved.
Feature item 11:
the manufacturing apparatus of the laminated core section has a mold, in which,
in each process of punching out the stator core, the punched out stator core is discharged in a direction perpendicular to the conveying direction of the die in a non-confusing manner,
since the method of recovering the laminated core is easy, there is an effect that the production efficiency is further improved.
Feature item 12:
the manufacturing apparatus of the laminated core section has a mold, in which,
In the case of punching out the stator core from the inside of the rotor core,
if the number of stator cores punched inside the rotor core is set to a natural number a,
the number of steps for punching out the stator core is set to a natural number b,
in case a/b is not a natural number,
if the adjacent natural numbers c, d are set such that c > a/b > d,
the number of stator cores punched in the process of punching out the stator cores can be expressed by a natural number c or d,
the number of punched holes is made as uniform as possible in each step of punching out 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:
the manufacturing apparatus of the laminated core section has a mold, in which,
in the case of punching out the stator core from the inside of the rotor core,
if the number of stator cores punched inside the rotor core is set to a natural number a,
the number of steps for punching out the stator core is set to a natural number b,
in case a/b is a natural number,
if a natural number e such as e=a/b is set,
the number of stator cores blanked in the process of blanking the stator cores can be expressed by a natural number e,
The number of punched holes is made as uniform as possible in each step of punching out the stator core to disperse the pressure applied to the stator core, thereby having an effect of further improving the dimensional accuracy.
Features 14:
the manufacturing apparatus of the laminated core section has a mold, in which,
in the step of punching out the stator cores, adjacent stator cores are separated in the punching-out conveying direction by an interval equal to or greater than the width of the pole teeth in the punching-out conveying direction,
when stator cores are punched simultaneously, the interval between adjacent stator cores can be maintained, and therefore, the dimensional accuracy of the stator cores is further improved.
Feature item 15:
the manufacturing apparatus of the laminated core section has a mold, in which,
in the step of punching out the stator cores, adjacent stator cores are separated by an interval equal to or greater than the width of the pole teeth in the direction perpendicular to the punching-out conveying direction,
when stator cores are punched simultaneously, the interval between adjacent stator cores can be maintained, and therefore, the dimensional accuracy of the stator cores is further improved.
Features 16:
the manufacturing apparatus of the laminated core section has a mold, in which,
in addition to the number of stator cores punched on the central axis of the rotor core parallel to the punching conveying direction, the number of stator cores taken out from the inside of the rotor core is symmetrical with respect to the central axis of the rotor core parallel to the punching conveying direction,
the stator core is symmetrically arranged to uniformly disperse the pressure applied to the stator core, and thus, there is an effect that dimensional accuracy is further improved.
Feature item 17:
the manufacturing apparatus of the laminated core section has a mold, in which,
in addition to the number of stator cores punched on the central axis of the rotor core perpendicular to the punching conveying direction, the number of stator cores taken out from the inside of the rotor core is symmetrical with respect to the central axis of the rotor core perpendicular to the punching conveying direction,
the stator core is symmetrically arranged to uniformly disperse the pressure applied to the stator core, and thus, there is an effect that dimensional accuracy is further improved.
Features 18:
the manufacturing apparatus of the laminated core section has a mold, in which,
the yoke portions of the stator core are all oriented in the same direction,
the difference in magnetic anisotropy between the rolling direction and the straight direction and the resultant cogging torque or torque pulse can be reduced. Since a direction having good magnetic characteristics can be used, an effect of high torque can be obtained.
Features 19:
a rotary electric machine manufactured by a method of manufacturing a laminated core in which punched electromagnetic steel plates are laminated,
the rotor core and the stator core are taken from the inner side of the rotor core,
the yoke portions of the stator core are all oriented in the same direction,
the difference in magnetic anisotropy between the rolling direction and the straight direction and the resultant cogging torque or torque pulse can be reduced. Since a direction having good magnetic characteristics can be used, an effect of high torque can be obtained.
In the drawings, the same reference numerals denote the same or corresponding parts.
Further, while various exemplary embodiments and examples have been described, the various features, aspects and functions described in one or more embodiments are not limited to application to a particular embodiment, and may be applied to embodiments alone or in various combinations.
Accordingly, numerous modifications, not illustrated, are contemplated as falling within the scope of the disclosed technology. For example, the case where at least one component is deformed, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.
In the drawings, the same reference numerals denote the same or corresponding parts.

Claims (15)

1. A method of manufacturing a laminated core of a rotating electrical machine, the rotating electrical machine comprising:
a stator core configured by connecting stator core element lamination blocks, which are configured by laminating plate-shaped stator core elements formed in a T-shape by pole tooth portions and core back portions in an axial direction, in a ring shape in a circumferential direction; and
a rotor core that is constituted by laminating annular plate-shaped rotor core elements in an axial direction, and that is surrounded by the stator core,
the method for manufacturing the laminated core of the rotating electrical machine is characterized in that,
before the step of punching out the plate-like rotor core member from the strip-like electromagnetic steel plate formed by rolling by a punching mechanism,
In a second region of the strip-shaped electromagnetic steel sheet which is located further inside than a first region where the plate-shaped rotor core elements are blanked, blanking a plurality of plate-shaped stator core elements each time by a plurality of blanking processes,
in each step of punching out the plate-shaped stator core elements, the adjacent T-shaped plate-shaped stator core elements are spaced apart in the feeding direction of the strip-shaped electromagnetic steel plate by a distance equal to or greater than the width of the plate-shaped stator core element in the feeding direction of the strip-shaped electromagnetic steel plate, and are spaced apart in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate by a distance equal to or greater than the width of the plate-shaped stator core element in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate.
2. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
each time the plate-shaped stator core elements are punched from the strip-shaped electromagnetic steel plate, the punched plate-shaped stator core elements are stored in the respective plate-shaped stator core element storage chambers in a direction perpendicular to a feeding direction of the strip-shaped electromagnetic steel plate.
3. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
In the case of blanking the plate-like stator core elements from the area enclosed by the annular plate-like rotor core elements,
if the number of plate-like stator core elements punched out from the area enclosed by the plate-like rotor core elements is set to a natural number a,
the number of steps of punching the plate-shaped stator core element is set to a natural number b,
in case a/b is not a natural number,
if the adjacent natural numbers c, d are set such that c > a/b > d,
the number of the plate-shaped stator core elements blanked in the step of blanking the plate-shaped stator core elements is set to the natural number c or d.
4. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
in the case of blanking the plate-like stator core elements from the area enclosed by the annular plate-like rotor core elements,
if the number of plate-like stator core elements blanked out from the area enclosed by the plate-like rotor core elements is set to a natural number a,
the number of steps of punching the plate-shaped stator core element is set to a natural number b,
in case a/b is a natural number,
if a natural number e such as e=a/b is set,
The number of the plate-shaped stator core elements blanked in the step of blanking the plate-shaped stator core elements is set to the natural number e.
5. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
the number of the plate-like stator core elements punched out from the area surrounded by the plate-like rotor core elements is symmetrical with respect to the central axis of the plate-like rotor core elements parallel to the feeding direction of the strip-like electromagnetic steel sheet, except for the plate-like stator core elements punched out on the central axis of the plate-like rotor core elements parallel to the feeding direction of the strip-like electromagnetic steel sheet.
6. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
the number of the plate-like stator core elements punched out from the area surrounded by the plate-like rotor core elements is symmetrical with respect to the central axis of the plate-like rotor core element perpendicular to the feeding direction of the strip-like electromagnetic steel sheet, except for the plate-like stator core elements punched out on the central axis of the plate-like rotor core element perpendicular to the feeding direction of the strip-like electromagnetic steel sheet.
7. The method for manufacturing a laminated core of a rotary electric machine according to claim 1, wherein,
the respective tooth portions of the blanked plate-like stator core elements are all oriented in the same direction.
8. A laminated core manufacturing apparatus for a rotating electrical machine, wherein the rotating electrical machine has:
a stator core configured by connecting stator core element lamination blocks, which are configured by laminating plate-shaped stator core elements formed in a T-shape by pole tooth portions and core back portions in an axial direction, in a ring shape in a circumferential direction; and
a rotor core that is constituted by laminating annular plate-shaped rotor core elements in an axial direction, and that is surrounded by the stator core,
the laminated core manufacturing apparatus of the rotating electrical machine is characterized by comprising a punching mechanism,
the punching mechanism punches a plurality of the plate-shaped stator core elements each time in a plurality of punching steps in a second region of the strip-shaped electromagnetic steel plate that is further inside than a 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 electromagnetic steel plate formed by rolling,
In each step of punching out the plate-shaped stator core elements, the adjacent T-shaped plate-shaped stator core elements are spaced apart in the feeding direction of the strip-shaped electromagnetic steel plate by a distance equal to or greater than the width of the plate-shaped stator core element in the feeding direction of the strip-shaped electromagnetic steel plate, and are spaced apart in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate by a distance equal to or greater than the width of the plate-shaped stator core element in the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate.
9. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
comprises a plate-shaped stator core element storage chamber, wherein each time the plate-shaped stator core element is punched from the strip-shaped electromagnetic steel plate, the punched plate-shaped stator core element is stored in each plate-shaped stator core element storage chamber along the direction perpendicular to the feeding direction of the strip-shaped electromagnetic steel plate.
10. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
in the case of blanking the plate-like stator core elements from the area enclosed by the annular plate-like rotor core elements,
If the number of plate-like stator core elements blanked out from the area enclosed by the plate-like rotor core elements is set to a natural number a,
the number of steps of punching the plate-shaped stator core element is set to a natural number b,
in case a/b is not a natural number,
if the adjacent natural numbers c, d are set such that 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.
11. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
in the case of blanking the plate-like stator core elements from the area enclosed by the annular plate-like rotor core elements,
if the number of plate-like stator core elements blanked out from the area enclosed by the plate-like rotor core elements is set to a natural number a,
the number of steps of punching the plate-shaped stator core element is set to a natural number b,
in case a/b is a natural number,
if a natural number e such as e=a/b is set,
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.
12. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
the number of the plate-like stator core elements punched out by the punching mechanism from the area surrounded by the plate-like rotor core elements is symmetrical with respect to the central axis of the plate-like rotor core elements parallel to the feeding direction of the strip-like electromagnetic steel sheet, except for the plate-like stator core elements punched out on the central axis of the plate-like rotor core elements parallel to the feeding direction of the strip-like electromagnetic steel sheet.
13. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
the number of the plate-like stator core elements punched out by the punching mechanism from the area surrounded by the plate-like rotor core elements is symmetrical with respect to the central axis of the plate-like rotor core elements perpendicular to the feeding direction of the strip-like electromagnetic steel sheet, except for the plate-like stator core elements punched out on the central axis of the plate-like rotor core elements perpendicular to the feeding direction of the strip-like electromagnetic steel sheet.
14. The laminated core manufacturing apparatus of a rotary electric machine according to claim 8, wherein,
The orientation of the respective tooth portions of the plate-like stator core elements blanked by the punching mechanism is the same direction.
15. A rotary electric machine manufactured by the laminated core manufacturing method of a rotary electric machine according to any one of claims 1 to 7, characterized in that,
the strip-shaped electromagnetic steel plate rolling directions of the plate-shaped stator core elements arranged along the circumferential direction are all the same, and the strip-shaped electromagnetic steel plate rolling directions are consistent with the directions from the core back to the front end parts of the pole tooth parts in the plate-shaped stator core elements.
CN202010646002.3A 2019-07-12 2020-07-07 Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine Active CN112217350B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-129847 2019-07-12
JP2019129847A JP6877495B2 (en) 2019-07-12 2019-07-12 Laminated iron core manufacturing method and laminated iron core manufacturing equipment for rotary electric machines

Publications (2)

Publication Number Publication Date
CN112217350A CN112217350A (en) 2021-01-12
CN112217350B true CN112217350B (en) 2023-08-29

Family

ID=74059096

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010646002.3A Active CN112217350B (en) 2019-07-12 2020-07-07 Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine

Country Status (2)

Country Link
JP (1) JP6877495B2 (en)
CN (1) CN112217350B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002186227A (en) * 2000-12-13 2002-06-28 Aisin Aw Co Ltd Method of manufacturing large diameter motor and driver for hybrid vehicle using the same
JP2013013189A (en) * 2011-06-28 2013-01-17 Mitsui High Tec Inc Method for manufacturing divided laminated iron cores
JP2013226013A (en) * 2012-04-23 2013-10-31 Honda Motor Co Ltd Manufacturing method of laminate core and manufacturing apparatus of the same
JP2018007530A (en) * 2016-07-08 2018-01-11 トヨタ自動車株式会社 Method for manufacturing rotor core
JP2018121443A (en) * 2017-01-25 2018-08-02 株式会社三井ハイテック Manufacturing method of lamination iron core and manufacturing apparatus of lamination iron core

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007028799A (en) * 2005-07-15 2007-02-01 Asmo Co Ltd Production method for core
JP2010075027A (en) * 2008-09-22 2010-04-02 Asmo Co Ltd Stator core and motor
JP6981153B2 (en) * 2017-09-29 2021-12-15 日本製鉄株式会社 Stator core design index determination method, stator core design index determination device, and stator core manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002186227A (en) * 2000-12-13 2002-06-28 Aisin Aw Co Ltd Method of manufacturing large diameter motor and driver for hybrid vehicle using the same
JP2013013189A (en) * 2011-06-28 2013-01-17 Mitsui High Tec Inc Method for manufacturing divided laminated iron cores
JP2013226013A (en) * 2012-04-23 2013-10-31 Honda Motor Co Ltd Manufacturing method of laminate core and manufacturing apparatus of the same
JP2018007530A (en) * 2016-07-08 2018-01-11 トヨタ自動車株式会社 Method for manufacturing rotor core
JP2018121443A (en) * 2017-01-25 2018-08-02 株式会社三井ハイテック Manufacturing method of lamination iron core and manufacturing apparatus of lamination iron core

Also Published As

Publication number Publication date
CN112217350A (en) 2021-01-12
JP2021016252A (en) 2021-02-12
JP6877495B2 (en) 2021-05-26

Similar Documents

Publication Publication Date Title
JP3656733B2 (en) Stator for rotating electrical machine for vehicle and method for manufacturing the same
EP3093964B1 (en) Method for manufacturing workpiece and method for manufacturing laminated core
CN103378701A (en) Rotor for a motor and a motor
KR101951823B1 (en) Punch processing method for laminated iron core and method for manufacturing laminated iron core
US8234775B2 (en) Method for manufacturing laminated rotor core
CN112217354B (en) Method and apparatus for manufacturing laminated core of rotating electrical machine
EP3474427B1 (en) Manufacturing method of core of rotating electrical machine, and core of rotating electrical machine
CN109792193B (en) Method for blanking electromagnetic steel sheet and method for manufacturing laminated core
CN112217353B (en) Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine
CN112217350B (en) Laminated core manufacturing method and apparatus for rotary electric machine, and rotary electric machine
JP2017208986A (en) Method for manufacturing laminated iron core for rotary electric machine
JP6890456B2 (en) Electric motor rotor manufacturing method and electric motor rotor
JP5964221B2 (en) Armature manufacturing method and progressive mold apparatus
JP5297147B2 (en) Manufacturing method of magnet mounted rotor core
CN111742472A (en) Method for manufacturing core component and core component
JP2016152725A (en) Laminate having temporary caulking, manufacturing method thereof, and manufacturing method of lamination iron core
WO2022137621A1 (en) Split core, dynamo-electric machine, method for manufacturing split core, and method for manufacturing dynamo-electric machine
JPH07101980B2 (en) Method for manufacturing stator core of rotating electric machine
CN108599481B (en) Stator core manufacturing method, stator core, and motor
JP6316783B2 (en) Manufacturing method and manufacturing apparatus of laminated iron core
KR20050006567A (en) Core for electric motor and manufacturing method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant