WO2024063282A1 - Apparatus for manufacturing laminated core of motor - Google Patents

Apparatus for manufacturing laminated core of motor Download PDF

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Publication number
WO2024063282A1
WO2024063282A1 PCT/KR2023/010078 KR2023010078W WO2024063282A1 WO 2024063282 A1 WO2024063282 A1 WO 2024063282A1 KR 2023010078 W KR2023010078 W KR 2023010078W WO 2024063282 A1 WO2024063282 A1 WO 2024063282A1
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WO
WIPO (PCT)
Prior art keywords
laminated core
heating
laminated
piercing
mold
Prior art date
Application number
PCT/KR2023/010078
Other languages
English (en)
French (fr)
Inventor
Gye Yong Heo
Original Assignee
Gye Yong Heo
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 Gye Yong Heo filed Critical Gye Yong Heo
Publication of WO2024063282A1 publication Critical patent/WO2024063282A1/en

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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
    • 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
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • 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
    • B21D28/14—Dies
    • 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
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

  • the present invention relates to an apparatus for manufacturing a laminated core of a motor, in particular, for driving an electric vehicle. More specifically, the present invention relates to an apparatus for manufacturing a laminated core of a motor capable of increasing productivity by locally heating a laminated core in a press mold to manufacture a laminated core so that the laminar members configuring the motor core are manufactured in a temporarily bonded state.
  • a motor comprises a stator and a rotor.
  • the stator and rotor include a stator core and a rotor core manufactured by molding a thin electrical steel strip into a laminar member by a piercing and blanking process in a press device, and laminating a plurality of laminar members.
  • a stator core or a rotor core manufactured by laminating laminar members is referred to as a laminated core.
  • the laminar members laminated to manufacture a laminated core need to be bonded to a laminar member thereabove and a laminar member therebelow.
  • Various techniques are known as a method for bonding laminar members. For example, an interlocking method forming protrusions on a laminar member so that the protrusions fit in one another, and an attachment technology of applying an adhesive to the laminar member surface are known.
  • Korean Patent No. 10-1811266 a method of bonding core sheets to each other by molding and laminating a single sheet of laminar member in a press mold using a so-called self-bonding steel strip coated with an adhesive layer on the surface of the electrical steel strip (hereinafter, "SB steel strip"), and at the same time, heating the laminated core so as to thermally cure the adhesive layer on the surface of the laminar member is attracting attention.
  • the laminated core is heated using a high-frequency induction heating device installed in the press mold.
  • the surrounding mold parts are also heated as the laminated core is heated, and the processing of the product is not performed smoothly due to thermal expansion.
  • a high-frequency induction heating device and a cooling device are required, the facilities in the mold become very complicated, and it becomes necessary to consider the change in dimension of the mold according to temperature change. In particular, in light of the recent trend of increasing the size of driving motors for electric vehicles, it is difficult to apply the technology to mass production in reality.
  • Korean Patent No. 10-2112808 discloses a technology enabling the laminar members of the laminated core to be quickly bonded by applying a curing accelerator on the surface of an SB steel strip in a press mold, and performing high-frequency induction heating on the laminated core in a blanking process.
  • a curing accelerator is a chemical substance, there are difficulties due to legal compliance or licensing issues in environmental pollution or facility construction.
  • Korean Patent No. 10-2425061 discloses a technology of performing high-frequency induction heating and cooling by laminating a laminated core in a press mold, bonding an upper jig to a lower jig while aligning the laminated core with the lower jig, and transferring the jigs through a conveyor.
  • the laminated core is not heated in a press mold, but is configured to be heated in a separate post-process.
  • the laminar members molded in the press mold are aligned as they are in the lower jig, since the laminar members are not bonded to each other, the position of each member may change when adding pressure to the upper jig, and it is difficult to accurately align and transfer the lower jig.
  • the laminated core is heated by high-frequency heating even in the post-process, in addition to the laminated core, the jig or other parts are rapidly heated to a high temperature, and a thin-walled portion of the rotor core may burn in portions where several holes for inserting the magnet are concentrated such as a rotor core.
  • the present inventor suggests an apparatus for manufacturing a laminated core with a new structure capable of improving the quality and productivity of the laminated core product by locally heating and temporarily bonding the laminated core in a press mold so that the laminated core can be heated in a separate post-process while maintaining the shape of the laminated core when seated in the transfer jig.
  • An apparatus for manufacturing a laminated core of a motor is characterized by comprising: a lower mold 1 installed with a plurality of piercing dies 11, and a blanking mold 12 installed on one side of the piercing dies 11; and an upper mold 2 comprising a plurality of piercing punches 21 installed on an upper part of the piercing die 11, and a blanking punch 22 installed on an upper part of the blanking die 12, wherein a laminating unit 3 comprising a heating unit 31, and a squeeze ring 32 which is positioned inside the heating unit 31 and has a laminar member 201 molded in the blanking die 12 laminated on the inner circumferential surface, is installed on a lower part of the blanking die 12, and the heating unit 31 is installed outside the squeeze ring 32, and a plurality of laminar members 201 are laminated through a plurality of heating windows 32A formed on the squeeze ring 32 to locally heat the laminated core 200.
  • the heating unit 31 may comprise a casing 311, and a plurality of heating lamps 312 installed on the inner surface of the casing 311, and the heating lamp 312 may heat a heating portion 200A of the laminated core 200 through the heating window 32A.
  • a reflective surface 313 may be formed in a portion of the casing 311 where the heating lamp 312 is positioned.
  • the apparatus may further comprise a separation member 202 laminated on an upper part of the laminated core 200, wherein the separation member 202 has a notched part 202A formed by having a portion corresponding to the heating portion 200A cut.
  • the apparatus may further comprise a back pressure unit 4 installed on a lower part of the laminating unit 3, for seating the laminated core 200 on a pedestal 41 to take out the laminated core 200.
  • a back pressure unit 4 installed on a lower part of the laminating unit 3, for seating the laminated core 200 on a pedestal 41 to take out the laminated core 200.
  • the present invention has an effect of providing an apparatus for manufacturing a laminated core of a motor capable of improving the quality of a product and improving the productivity of a laminated core by manufacturing the laminated core by locally heating and temporarily bonding the laminated core in a press mold for molding the laminated core to maintain the shape of the laminated core while seating the laminated core on a transfer jig.
  • Fig. 1 is a conceptual diagram illustrating a base material used in an apparatus for manufacturing a laminated core of a motor according to the present invention
  • Fig. 2 is a perspective view illustrating a laminated core laminated in an apparatus for manufacturing a laminated core according to the present invention
  • Fig. 3 is a conceptual diagram illustrating a side surface of an apparatus for manufacturing a laminated core according to the present invention
  • Fig. 4 is a plan view taken along line A-A' of Fig. 3, which is a plan view illustrating a laminating unit of an apparatus for manufacturing a laminated core according to the present invention
  • Fig. 5 is a perspective view illustrating a squeeze ring of an apparatus for manufacturing a laminated core according to the present invention.
  • Fig. 6 is a plan view illustrating a laminated core and a separation member of an apparatus for manufacturing a laminated core according to the present invention.
  • Fig. 1 is a conceptual diagram illustrating a base material 100 used in an apparatus for manufacturing a laminated core of a motor according to the present invention.
  • Fig. 2 is a perspective view illustrating a laminated core 200 laminated in an apparatus for manufacturing a laminated core according to the present invention.
  • the base material 100 used in the present invention is made of SB steel strip and continuously supplied to the apparatus for manufacturing a laminated core to be molded into a laminar member 201, and the laminar member 201 is laminated in a predetermined number to be manufactured into a laminated core 200.
  • the base material 100 is made of SB steel strip having an adhesive coating layer 102 on the surface of the electric steel strip 101 and continuously supplied to the apparatus for manufacturing a laminated core.
  • the base material 100 supplied is molded into a laminar member 201 through a piercing and blanking process and laminated at the same time in the apparatus for manufacturing a laminated core to become a laminated core 200.
  • the laminated core 200 manufactured in the present invention allows the shape of the laminated core 200 to be maintained as it is even after lamination by locally curing the adhesive coating layer 102 existing between laminar members in a mold.
  • the laminated core 200 manufactured in the present invention allows the adhesive coating layer 102 to be completely cured through a post-process in a separate apparatus. Therefore, the laminated core 200 manufactured in the present invention is not a final product in which the laminar members are completely bonded to each other, but a semi-finished product in which the adhesive layer between the laminar members is locally cured and temporarily bonded.
  • the laminated core 200 is explained being illustrated in the shape of a rotor core, but the present invention includes the case of manufacturing a stator core as well as a rotor core.
  • Fig. 3 is a conceptual diagram illustrating a side surface of an apparatus for manufacturing a laminated core according to the present invention.
  • the apparatus for manufacturing a laminated core according to the present invention is a press device comprising a lower mold 1 and an upper mold 2, and manufactures a laminated core 200 by repeating a process in which when a base material 100 is supplied to a predetermined pitch, the upper mold 2 descends to mold the base material 100, and when the upper mold 2 ascends again, the base material 100 moves to a predetermined pitch.
  • a plurality of piercing dies 11 are installed in the lower mold 1, and a blanking die 12 is installed on one side of the piercing die 11.
  • a piercing punch 21 is installed at a position corresponding to the piercing die 11 of the lower mold 1
  • a blanking punch 22 is installed at a position corresponding to the blanking die 12.
  • Fig. 3 illustrates using three piercing dies 11 and three piercing punches 21 in the piercing process, but the number of piercing dies 11 and piercing punches 21 is not limited thereto. More or less piercing dies 11 and piercing punches 21 may be applied depending on the shape of the laminar member 201 and separation member 202.
  • a laminating unit 3 is installed on a lower part of the blanking die 12, and comprises a heating unit 31 and a squeeze ring 32.
  • the laminar member 201 molded in the blanking die 12 is manufactured into a laminated core 200 by being press-fitted and laminated on the inner circumferential surface of the squeeze ring 32.
  • the laminated core 200 which is laminated to be pushed out of the lower part of the squeeze ring 32 is locally heated by the heating unit 31 so that a portion of the adhesive coating layer 102 between the laminar members 201 is thermally cured and the laminar members 201 of the laminated core 200 maintain a state bonded to each other.
  • the heating unit 31 locally heats the laminated core 200 laminated on the inner circumferential surface of the squeeze ring 32 so that a portion of the adhesive coating layer 102 between the laminar members is cured and the laminar members are bonded to each other. Meanwhile, when one laminated core 200 is laminated, a separation member 202 is used to prevent the laminated core 200 from adhering to a laminar member laminated thereon. When laminar members 201 are laminated sufficient to manufacture one laminated core 200, a separation member 202 may be laminated on the laminated core 200 to separate the laminated core 200 from a laminated core laminated thereon.
  • the laminated core 200 laminated in the squeeze ring 32 is taken out by a back pressure unit 4.
  • the back pressure unit 4 is installed on a lower part of the laminating unit 3, and comprises a pedestal 41 vertically moving on a lower part of the squeeze ring 32.
  • a laminated core 200 whose lamination is completed is seated on the pedestal 41.
  • the pedestal 41 is operated by being connected to a vertical driving means 42 by a rod 43.
  • the vertical driving means 42 is operated to move the rod 43 in the vertical direction, the pedestal 41 installed on an upper part of the rod 43 also moves vertically accordingly.
  • Various driving means such as a motor or cylinder may be used as a vertical driving means 42.
  • the pedestal 41 moves upward to seat the laminated core 200 laminated in the squeeze ring 32, the pedestal 41 moves back down, and the laminated core 200 is transferred to the subsequent process by a separate transfer means (not shown).
  • Fig. 4 is a plan view taken along line A-A' of Fig. 3, which is a plan view illustrating a laminating unit 3 of an apparatus for manufacturing a laminated core according to the present invention.
  • Fig. 5 is a perspective view illustrating a squeeze ring 32 of an apparatus for manufacturing a laminated core according to the present invention.
  • the laminating unit 3 of the present invention comprises a heating unit 31 and a squeeze ring 32.
  • the heating unit 31 is installed to surround the squeeze ring 32, and comprises a casing 311 and a heating lamp 312.
  • the squeeze ring 32 has a hollow cylindrical shape, and a plurality of heating windows 32A are formed to penetrate the inside and outside of the squeeze ring 32.
  • the casing 311 of the heating unit 31 has a hollow cylindrical shape, and a plurality of heating lamps 312 are installed along the inner circumferential surface of the casing 311 at regular intervals.
  • the number of heating lamps 312 is not particularly limited, and the heating lamp locally heats the laminated core 200 to cure and bond a portion of the adhesive coating layer of the laminar member so that the laminar members of the laminated core 200 are not separated from each other and the shape of the laminated core 200 is maintained until the laminated core 200 is transferred to the subsequent process.
  • a heating lamp 312 is installed to face the heating window 32A formed on the squeeze ring 32, and the light emitted from the heating lamp 312 passes through the heating window 32A to heat the laminated core 200 laminated on the inner circumferential surface of the squeeze ring 32. At this time, the heating lamp 312 locally emits light only on a portion of the laminated core 200, and the heating portion 200A of the laminated core 200 is a portion to which light is emitted through the heating window 32A.
  • Fig. 4 illustrates eight heating lamps 312 and eight heating windows 32A, but the number of heating lamps 312 and heating windows 32A is not limited thereto, and may be changed and applied to an appropriate number according to the size or shape of the laminated core 200.
  • the heating lamp 312 used in the present invention is preferably a halogen lamp, and other UV lamps, near-infrared lamps, far-infrared lamps, etc. may be used.
  • the heating lamp 312 is an equipment in which the lamp converts electrical energy into light energy.
  • the light L emitted from the heating lamp 312 is absorbed in an object to be heated directly or being reflected from a reflective surface 313, generating heat very quickly. Therefore, preferably, a reflective surface 213 for reflecting and locally concentrating light emitted from the heating lamp 312 is formed on the inner circumferential surface of the casing 311, and a heating lamp 312 is installed inside the reflective surface 213.
  • the height of the heating lamp 312 may be equal to or slightly shorter than the height of the heating window 32A so that the light L emitted from the heating lamp 312 is irradiated on the heating portion 200A of the laminated core 200 through the heating window 32A to be locally heated.
  • the adhesive coating layer of the heating portion 200A is cured so as to bond the laminar members to each other, and the laminated core 200 maintains the shape of the laminated core 200 even when it is discharged to a back pressure device and transferred to the subsequent process.
  • a final laminated core 200 product may be obtained by completely curing the adhesive coating layer 102 of the surface of the laminar member through overall heating of the laminated core 200 and cooling the same.
  • Fig. 6 is a plan view illustrating a laminated core 200 and a separation member 202 of an apparatus for manufacturing a laminated core according to the present invention.
  • the laminated core 200 is manufactured by laminating laminar members on the inner circumferential surface of the squeeze ring 32, and at the same time, the heating portion 200A of the laminated core 200 is thermally cured by the heating unit 31 so as to bond the laminar members to each other.
  • a separation member 202 has to be molded and positioned between the two laminated cores 200.
  • a separation member 202 is laminated thereon at the 21st.
  • the two laminated cores may be separated without bonding to each other.
  • a notched part 202A having a portion corresponding to the heating portion 200A of the laminated core 200 cut is formed in the separation member 202.
  • the shape of the notched part 202A may be molded in a piercing mold. Since the separation member 202 positioned between two laminar members is not bonded to the heating portion 200A by the notched part 202A, one laminated core may be separated from another laminated core laminated thereon.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
PCT/KR2023/010078 2022-09-22 2023-07-14 Apparatus for manufacturing laminated core of motor WO2024063282A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020220120060A KR20240041025A (ko) 2022-09-22 2022-09-22 모터의 적층 코어 제조 장치
KR10-2022-0120060 2022-09-22

Publications (1)

Publication Number Publication Date
WO2024063282A1 true WO2024063282A1 (en) 2024-03-28

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PCT/KR2023/010078 WO2024063282A1 (en) 2022-09-22 2023-07-14 Apparatus for manufacturing laminated core of motor

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KR (1) KR20240041025A (ko)
WO (1) WO2024063282A1 (ko)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003077852A (ja) * 2001-09-03 2003-03-14 Dainippon Screen Mfg Co Ltd 熱処理装置および熱処理方法
KR20180023758A (ko) * 2016-08-26 2018-03-07 (주)항남 적층 코어의 자동 분리가 가능한 회전 가열 접착식 회전자 코어 및 고정자 코어 동시 제조 장치 및 제조 방법
KR20180077925A (ko) * 2016-12-29 2018-07-09 주식회사 대창 히팅 모듈
KR20190051165A (ko) * 2017-11-06 2019-05-15 (주)항남 코어의 분리가 용이한 접착식 적층 코어 제조 장치
KR20190051812A (ko) * 2017-11-06 2019-05-15 (주)항남 접착제 코팅 방식의 접착식 적층 코어 제조 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003077852A (ja) * 2001-09-03 2003-03-14 Dainippon Screen Mfg Co Ltd 熱処理装置および熱処理方法
KR20180023758A (ko) * 2016-08-26 2018-03-07 (주)항남 적층 코어의 자동 분리가 가능한 회전 가열 접착식 회전자 코어 및 고정자 코어 동시 제조 장치 및 제조 방법
KR20180077925A (ko) * 2016-12-29 2018-07-09 주식회사 대창 히팅 모듈
KR20190051165A (ko) * 2017-11-06 2019-05-15 (주)항남 코어의 분리가 용이한 접착식 적층 코어 제조 장치
KR20190051812A (ko) * 2017-11-06 2019-05-15 (주)항남 접착제 코팅 방식의 접착식 적층 코어 제조 장치

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