WO2024063283A1 - Apparatus for heating laminated core of motor - Google Patents

Apparatus for heating laminated core of motor Download PDF

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Publication number
WO2024063283A1
WO2024063283A1 PCT/KR2023/010080 KR2023010080W WO2024063283A1 WO 2024063283 A1 WO2024063283 A1 WO 2024063283A1 KR 2023010080 W KR2023010080 W KR 2023010080W WO 2024063283 A1 WO2024063283 A1 WO 2024063283A1
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WO
WIPO (PCT)
Prior art keywords
heating
laminated core
core
present
casing
Prior art date
Application number
PCT/KR2023/010080
Other languages
French (fr)
Inventor
Gye Yong Heo
Original Assignee
Gye Yong Heo
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Filing date
Publication date
Application filed by Gye Yong Heo filed Critical Gye Yong Heo
Publication of WO2024063283A1 publication Critical patent/WO2024063283A1/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications
    • H05B3/0042—Heating devices using lamps for industrial applications used in motor vehicles
    • 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
    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • 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 heating a laminated core of a motor, in particular, for driving an electric vehicle. More specifically, the present invention relates to an apparatus for heating a laminated core of a motor capable of increasing productivity by effectively heating a laminated core to manufacture a laminated core so that an adhesive coating layer between the laminar members configuring the laminated core may be cured.
  • 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.
  • Korean Patent Laid-Open No. 10-2021-0154779 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 positioning the laminated core on the lower jig, and transferring the jigs through a conveyor. Even in the prior art, since the laminated core is heated by high-frequency heating, in addition to the laminated core, the jig or other parts are rapidly heated to a high temperature, and burning occurs in portions where several holes for inserting the magnet are concentrated such as a rotor core.
  • the present inventor suggests an apparatus for heating a laminated core capable of solving the above problems by configuring the laminated core to be heated by a heating lamp method instead of a high-frequency heating method.
  • An apparatus for heating a laminated core is characterized by comprising: a casing 21 in which a reflective plate 212 is installed thereinside; and a plurality of heating lamps 24 installed in the casing 21 so as to be positioned inside the reflective plate 212 in order to heat the laminated core seated on a transfer jig 10.
  • the plurality of heating lamps 24 may be installed between an upper support 22 coupled to an upper part of the casing 21 and a lower support 23 coupled to a lower part of the casing 21.
  • the apparatus may further comprise a heat insulating material 211 installed between the upper support 22 and the lower support 23 on an inner surface of the casing 21, and the reflective plate 212 may be installed on an inner surface of the heat insulating material 211.
  • the laminated core may be a stator core 100.
  • a groove 23B may be formed on a portion where some of the heating lamps 24 are installed among the plurality of heating lamps 24 installed on the lower support 23.
  • the laminated core may be a rotor core 200.
  • a first curved part 212A may be formed on the reflective plate 212 so that the rotor core 200 is uniformly heated by reflecting the light emitted from the heating lamp 24.
  • a second curved part 212B may be formed on the reflective plate 212 so that the rotor core 200 is locally heated by reflecting the light emitted from the heating lamp 24.
  • the apparatus may further comprise a plurality of blocking plates 25 installed at regular intervals along an inner circumferential surface of the upper support 22.
  • the present invention has an effect of providing an apparatus for heating a laminated core capable of improving the quality of a product, increasing productivity thereof, and locally heating part of the laminated core by applying a heating lamp to heat the laminated core.
  • Fig. 1 is a plan view illustrating a stator core and a rotor core used in an apparatus for heating a laminated core according to the present invention
  • Fig. 2 is a perspective view illustrating a transfer jig on which a stator core used in an apparatus for heating a laminated core according to the present invention is seated;
  • Fig. 3 is a side cross-sectional view illustrating a state in which an apparatus for heating a laminated core according to the present invention is positioned on an upper part of the transfer jig;
  • Fig. 4 is a side cross-sectional view illustrating a state in which an apparatus for heating a laminated core according to the present invention surrounds the transfer jig;
  • Fig. 5 is a cross-sectional view taken along line A-A' of Fig. 3;
  • Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 4;
  • Fig. 7 is a side cross-sectional view illustrating a state in which the laminated core is heated in an apparatus for heating a laminated core according to the present invention
  • Fig. 8 is a cross-sectional view taken along line C-C' of Fig. 7;
  • Fig. 9 is a conceptual diagram illustrating various embodiments of heating the laminated core in an apparatus for heating a laminated core according to the present invention.
  • Fig. 1 is a plan view illustrating a stator core 100 and a rotor core 200 used in the apparatus 20 for heating a laminated core according to the present invention.
  • Fig. 2 is a perspective view illustrating a transfer jig 10 on which a stator core 100 used in the apparatus 20 for heating a laminated core according to the present invention is seated.
  • the apparatus 20 for heating a laminated core is an apparatus for heating a laminated core seated on the transfer jig 10, i.e., a stator core 100 or a rotor core 200.
  • the laminated core used in the present invention is manufactured by laminating a laminar member molding SB steel strip by a press. Therefore, a process of thermally curing an adhesive layer between the laminar members by heating the laminated core formed by lamination is required.
  • the present invention relates to a heating device used in the process of thermally curing laminated cores.
  • Fig. 1 illustrates a laminated core used in the apparatus 20 for heating a laminated core according to the present invention.
  • Fig. 1(a) illustrates the shape of a stator core 100
  • Fig. 1(b) illustrates the shape of a rotor core.
  • the present invention is applicable to either a stator core 100 or a rotor core 200 requiring a thermal curing process.
  • the present invention is appropriate for heating a laminated core manufactured from an SB steel strip formed with an adhesive coating layer on the surface of the electrical steel strip.
  • Fig. 2 illustrates a transfer jig 10 on which the laminated core is seated in order to heat the laminated core in the apparatus 20 for heating a laminated core.
  • Fig. 2 illustrates the case where a stator core 100 among laminated cores is seated on the transfer jig 10, but the present invention may be applied to the case where a rotor core 200, not a stator core 100, is seated on the transfer jig 10 and heated by the apparatus 20 for heating a laminated core.
  • the present invention is exemplified by a stator core 100, it is obvious that a rotor core 200 may be seated on the transfer jig 10 and heated.
  • the transfer jig 10 comprises an upper jig 11 and a lower jig 12.
  • a stator core 100 is seated on the lower jig 12, and the transfer jig 10 is transferred to the apparatus 20 for heating a laminated core in a state in which the upper jig 11 is coupled to an upper part of the seated stator core 100.
  • the lower jig 12 of the transfer jig 10 is positioned on an upper part of a base plate 13.
  • the stator core manufactured by molding an electrical steel sheet into a laminar member and laminating the same goes through various processes such as heating, cooling, etc.
  • the transfer jig 10 is moved to each process of manufacturing the stator core 100.
  • Fig. 3 is a side cross-sectional view illustrating a state in which an apparatus 200 for heating a laminated core according to the present invention is positioned on an upper part of the transfer jig 10.
  • Fig. 4 is a side cross-sectional view illustrating a state in which an apparatus 20 for heating a laminated core according to the present invention surrounds the transfer jig 10.
  • the apparatus 20 for heating a laminated core positions the transfer jig 10 thereinside in a state where the stator core 100 is seated on the transfer jig 10.
  • the transfer jig 10 is positioned on a lower part of the apparatus 20 for heating a laminated core as in Fig. 3, when the base plate 13 on which the transfer jig 10 is seated ascends or the apparatus 20 for heating a laminated core descends, the transfer jig 10 is positioned inside the apparatus 20 for heating a laminated core as in Fig. 4 and is ready to be heated.
  • the configuration of the apparatus 20 for heating a laminated core according to the present invention will be described with reference to Figs. 5 and 6 together with Figs. 3 and 4.
  • Fig. 5 is a cross-sectional view taken along line A-A' of Fig. 3
  • Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 4, for illustrating the apparatus 20 for heating a laminated core according to the present invention.
  • the apparatus 20 for heating a laminated core comprises a casing 21, an upper support 22, a lower support 23, and a heating lamp 24.
  • the casing 21 has the upper support 22 coupled to its upper part and the lower support 23 coupled to its lower part, and a heat insulating material 211 and a reflective plate 212 are installed inside the casing 21.
  • the inner space of the casing 21 is a hollow cylindrical shape, and the transfer jig 10 is positioned in this space to be heated.
  • the upper support 22 is coupled to an upper part of the casing 21, and the lower support 23 is coupled to a lower part of the casing 21.
  • An upper hollow part 22A in which an upper jig 11 of the transfer jig 10 is positioned is formed in a middle part of the upper support 22.
  • a lower hollow part 23A is formed in a middle part of the lower support 23 so that the transfer jig 10 can pass therethrough.
  • a heat insulating material 211 is coupled between the upper support 22 and the lower support 23.
  • the planar diameter of the inner space of the heat insulating material 211 is formed to be larger than the diameter of the upper hollow part 22A and the lower hollow part 23A. Therefore, the upper support 22 and the lower support 23 have their inner parts protruding toward the middle part.
  • a plurality of heating lamps 24 are installed on this protruding part. The number of heating lamps 24 is not particularly limited, and it would be sufficient if they are installed at regular intervals to evenly heat the stator core 100.
  • a reflective plate 212 is installed along the inner surface of the heat insulating material 211 on the outer circumference of the plurality of heating lamps 24 at regular intervals from the heating lamp 24.
  • the reflective plate 212 reflects light generated from the heating lamp 24 so that the surface of the stator core 100 is evenly heated.
  • the heating lamp 24 is preferably a halogen lamp, and other UV lamps, near-infrared lamps, far-infrared lamps, etc. may be used.
  • the heating lamp 24 is an equipment in which the lamp converts electrical energy into light energy.
  • the light emitted from the heating lamp 24 is absorbed in an object to be heated being reflected from a reflective plate 212, generating heat very quickly. Therefore, a reflective plate 212 for reflecting light around the heating lamp 24 must be installed.
  • the height of the heating lamp 24 is equal to or slightly greater than the height of the stator core 100 so that the heating lamp 24 heats the stator core 100 and does not directly heat the transfer jig 10.
  • a groove 23B may be formed at a part where the coupling portion 101 of the lower support 23 is positioned without having a heating lamp 24 installed so as to reduce the intensity of the light absorbed at the coupling portion 101.
  • Fig. 7 is a side cross-sectional view illustrating a state in which the stator core 100 is heated in an apparatus 200 for heating a laminated core according to the present invention.
  • Fig. 8 is a cross-sectional view taken along line C-C' of Fig. 7.
  • a blocking plate 24 may be installed in the apparatus 20 for heating a laminated core according to the present invention to cover an upper part of the heating lamp 24.
  • the temperature of the stator core 100 heated by the heating lamp 24 rises as the stator core 100 is heated by the light emitted from the heating lamp 24. Since heat is also transferred internally by induction, and heat tends to rise from the bottom to the top, the temperature of the upper part of the stator core 100 may rise excessively. Therefore, in order to prevent such phenomenon, a plurality of blocking plates 25 are installed on an upper side of the heating lamp 24 so that the heating lamp 24 may heat the upper side of the stator core 100 at a weaker intensity.
  • the blocking plate 25 may be installed on the upper part of the casing 21 or on the inner circumferential surface of the upper support 22.
  • a plurality of blocking plates 25 are installed at regular intervals along the inner circumferential surface of the upper support 22.
  • the blocking plate 25 has a height sufficient to cover the upper part of the middle height of the stator core 100, but is not necessarily limited to this structure. The amount of light emitted may be appropriately applied by adjusting the number or height of the blocking plates 25.
  • the outer surface of the blocking plate 25, that is, the surface facing the heating lamp 24 has a property of reflecting light. Therefore, among the light generated from the heating lamp 24, it is possible to adjust the amount of light directly emitted from the heating lamp 24 at the upper side of the stator core 100 to be smaller than the lower side by reflecting some of the light emitted to the upper side of the stator core 100 so as to prevent the upper part of the stator core 100 from being overheated.
  • Fig. 9 is a conceptual diagram illustrating various embodiments of heating the laminated core in an apparatus 20 for heating a laminated core according to the present invention. As described above, the present invention adjusts the direction of light generated from the heating lamp 24 so as to achieve local heating.
  • Fig. 9(A) is a case of heating the stator core 100.
  • the light generated from the heating lamp 24 is directly irradiated on the surface of the stator core 100, and the light reflected from the reflective plate 212 is evenly irradiated on the surface of the stator core 100 so that the surface of the stator core 100 is evenly heated.
  • Fig. 9 (B) illustrates a case of heating the rotor core 200.
  • the rotor core 200 has a part into which a plurality of magnets are inserted, and thus when high temperature heat is concentrated, the rotor core 200 may be damaged. Therefore, it is possible to adjust the angle at which the light emitted from the heating lamp 24 is reflected by making the reflective plate 212 in the shape of a first curved part 212A so that light can be irradiated more evenly on the surface of the rotor core 200.
  • the shape of the second curved part 212B illustrated in Fig. 9(C) it is possible to allow the light emitted from the heating lamp 24 to be locally concentrated only on a certain part of the rotor core 200.
  • the shape of the second curved part 212B may be formed on the reflective plate 212, and a separate light collecting mirror (not shown) may be installed on the reflective plate 212.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

An apparatus for heating a laminated core according to the present invention comprises a casing 21 in which a reflective plate 212 is installed thereinside; and a plurality of heating lamps 24 installed in the casing 21 so as to be positioned inside the reflective plate 212 in order to heat the laminated core seated on a transfer jig 10.

Description

APPARATUS FOR HEATING LAMINATED CORE OF MOTOR
The present invention relates to an apparatus for heating a laminated core of a motor, in particular, for driving an electric vehicle. More specifically, the present invention relates to an apparatus for heating a laminated core of a motor capable of increasing productivity by effectively heating a laminated core to manufacture a laminated core so that an adhesive coating layer between the laminar members configuring the laminated core may be cured.
In general, 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. As such, 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.
As a recent technology, as in 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. In this prior art, the laminated core is heated using a high-frequency induction heating device installed in the press mold. When the laminated core is heated using a high-frequency heating device in the 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.
Korean Patent Laid-Open No. 10-2021-0154779 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 positioning the laminated core on the lower jig, and transferring the jigs through a conveyor. Even in the prior art, since the laminated core is heated by high-frequency heating, in addition to the laminated core, the jig or other parts are rapidly heated to a high temperature, and burning occurs in portions where several holes for inserting the magnet are concentrated such as a rotor core.
Accordingly, the present inventor suggests an apparatus for heating a laminated core capable of solving the above problems by configuring the laminated core to be heated by a heating lamp method instead of a high-frequency heating method.
It is an object of the present invention to provide an apparatus for heating a laminated core capable of improving the quality of a product and increasing productivity thereof by heating the laminated core by applying a heating lamp.
It is another object of the present invention to provide an apparatus for heating a laminated core capable of locally heating a part of the laminated core.
The above and other inherent objects of the present invention may all be easily achieved by the description of the present invention described below.
An apparatus for heating a laminated core according to the present invention is characterized by comprising: a casing 21 in which a reflective plate 212 is installed thereinside; and a plurality of heating lamps 24 installed in the casing 21 so as to be positioned inside the reflective plate 212 in order to heat the laminated core seated on a transfer jig 10.
In the present invention, the plurality of heating lamps 24 may be installed between an upper support 22 coupled to an upper part of the casing 21 and a lower support 23 coupled to a lower part of the casing 21.
In the present invention, the apparatus may further comprise a heat insulating material 211 installed between the upper support 22 and the lower support 23 on an inner surface of the casing 21, and the reflective plate 212 may be installed on an inner surface of the heat insulating material 211.
In the present invention, the laminated core may be a stator core 100.
In the present invention, a groove 23B may be formed on a portion where some of the heating lamps 24 are installed among the plurality of heating lamps 24 installed on the lower support 23.
In the present invention, the laminated core may be a rotor core 200.
In the present invention, a first curved part 212A may be formed on the reflective plate 212 so that the rotor core 200 is uniformly heated by reflecting the light emitted from the heating lamp 24.
In the present invention, a second curved part 212B may be formed on the reflective plate 212 so that the rotor core 200 is locally heated by reflecting the light emitted from the heating lamp 24.
In the present invention, the apparatus may further comprise a plurality of blocking plates 25 installed at regular intervals along an inner circumferential surface of the upper support 22.
The present invention has an effect of providing an apparatus for heating a laminated core capable of improving the quality of a product, increasing productivity thereof, and locally heating part of the laminated core by applying a heating lamp to heat the laminated core.
Fig. 1 is a plan view illustrating a stator core and a rotor core used in an apparatus for heating a laminated core according to the present invention;
Fig. 2 is a perspective view illustrating a transfer jig on which a stator core used in an apparatus for heating a laminated core according to the present invention is seated;
Fig. 3 is a side cross-sectional view illustrating a state in which an apparatus for heating a laminated core according to the present invention is positioned on an upper part of the transfer jig;
Fig. 4 is a side cross-sectional view illustrating a state in which an apparatus for heating a laminated core according to the present invention surrounds the transfer jig;
Fig. 5 is a cross-sectional view taken along line A-A' of Fig. 3;
Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 4;
Fig. 7 is a side cross-sectional view illustrating a state in which the laminated core is heated in an apparatus for heating a laminated core according to the present invention;
Fig. 8 is a cross-sectional view taken along line C-C' of Fig. 7; and
Fig. 9 is a conceptual diagram illustrating various embodiments of heating the laminated core in an apparatus for heating a laminated core according to the present invention.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a plan view illustrating a stator core 100 and a rotor core 200 used in the apparatus 20 for heating a laminated core according to the present invention. Fig. 2 is a perspective view illustrating a transfer jig 10 on which a stator core 100 used in the apparatus 20 for heating a laminated core according to the present invention is seated.
As illustrated in Figs. 1 and 2, the apparatus 20 for heating a laminated core according to the present invention is an apparatus for heating a laminated core seated on the transfer jig 10, i.e., a stator core 100 or a rotor core 200. The laminated core used in the present invention is manufactured by laminating a laminar member molding SB steel strip by a press. Therefore, a process of thermally curing an adhesive layer between the laminar members by heating the laminated core formed by lamination is required. As such, the present invention relates to a heating device used in the process of thermally curing laminated cores.
Fig. 1 illustrates a laminated core used in the apparatus 20 for heating a laminated core according to the present invention. Fig. 1(a) illustrates the shape of a stator core 100, and Fig. 1(b) illustrates the shape of a rotor core. The present invention is applicable to either a stator core 100 or a rotor core 200 requiring a thermal curing process. In particular, the present invention is appropriate for heating a laminated core manufactured from an SB steel strip formed with an adhesive coating layer on the surface of the electrical steel strip.
Fig. 2 illustrates a transfer jig 10 on which the laminated core is seated in order to heat the laminated core in the apparatus 20 for heating a laminated core. Fig. 2 illustrates the case where a stator core 100 among laminated cores is seated on the transfer jig 10, but the present invention may be applied to the case where a rotor core 200, not a stator core 100, is seated on the transfer jig 10 and heated by the apparatus 20 for heating a laminated core. In other words, although the present invention is exemplified by a stator core 100, it is obvious that a rotor core 200 may be seated on the transfer jig 10 and heated.
The transfer jig 10 comprises an upper jig 11 and a lower jig 12. A stator core 100 is seated on the lower jig 12, and the transfer jig 10 is transferred to the apparatus 20 for heating a laminated core in a state in which the upper jig 11 is coupled to an upper part of the seated stator core 100. The lower jig 12 of the transfer jig 10 is positioned on an upper part of a base plate 13. The stator core manufactured by molding an electrical steel sheet into a laminar member and laminating the same goes through various processes such as heating, cooling, etc. As the base plate 13 is transferred on a conveyor device (not shown), the transfer jig 10 is moved to each process of manufacturing the stator core 100.
Fig. 3 is a side cross-sectional view illustrating a state in which an apparatus 200 for heating a laminated core according to the present invention is positioned on an upper part of the transfer jig 10. Fig. 4 is a side cross-sectional view illustrating a state in which an apparatus 20 for heating a laminated core according to the present invention surrounds the transfer jig 10.
As illustrated in Figs. 3 and 4, in order to heat the stator core 100, the apparatus 20 for heating a laminated core according to the present invention positions the transfer jig 10 thereinside in a state where the stator core 100 is seated on the transfer jig 10. In a state where the transfer jig 10 is positioned on a lower part of the apparatus 20 for heating a laminated core as in Fig. 3, when the base plate 13 on which the transfer jig 10 is seated ascends or the apparatus 20 for heating a laminated core descends, the transfer jig 10 is positioned inside the apparatus 20 for heating a laminated core as in Fig. 4 and is ready to be heated. Hereinafter, the configuration of the apparatus 20 for heating a laminated core according to the present invention will be described with reference to Figs. 5 and 6 together with Figs. 3 and 4.
Fig. 5 is a cross-sectional view taken along line A-A' of Fig. 3, and Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 4, for illustrating the apparatus 20 for heating a laminated core according to the present invention.
The apparatus 20 for heating a laminated core according to the present invention comprises a casing 21, an upper support 22, a lower support 23, and a heating lamp 24. The casing 21 has the upper support 22 coupled to its upper part and the lower support 23 coupled to its lower part, and a heat insulating material 211 and a reflective plate 212 are installed inside the casing 21. The inner space of the casing 21 is a hollow cylindrical shape, and the transfer jig 10 is positioned in this space to be heated.
The upper support 22 is coupled to an upper part of the casing 21, and the lower support 23 is coupled to a lower part of the casing 21. An upper hollow part 22A in which an upper jig 11 of the transfer jig 10 is positioned is formed in a middle part of the upper support 22. A lower hollow part 23A is formed in a middle part of the lower support 23 so that the transfer jig 10 can pass therethrough.
A heat insulating material 211 is coupled between the upper support 22 and the lower support 23. The planar diameter of the inner space of the heat insulating material 211 is formed to be larger than the diameter of the upper hollow part 22A and the lower hollow part 23A. Therefore, the upper support 22 and the lower support 23 have their inner parts protruding toward the middle part. A plurality of heating lamps 24 are installed on this protruding part. The number of heating lamps 24 is not particularly limited, and it would be sufficient if they are installed at regular intervals to evenly heat the stator core 100.
A reflective plate 212 is installed along the inner surface of the heat insulating material 211 on the outer circumference of the plurality of heating lamps 24 at regular intervals from the heating lamp 24. The reflective plate 212 reflects light generated from the heating lamp 24 so that the surface of the stator core 100 is evenly heated.
The heating lamp 24 is preferably a halogen lamp, and other UV lamps, near-infrared lamps, far-infrared lamps, etc. may be used. In the present invention, the heating lamp 24 is an equipment in which the lamp converts electrical energy into light energy. The light emitted from the heating lamp 24 is absorbed in an object to be heated being reflected from a reflective plate 212, generating heat very quickly. Therefore, a reflective plate 212 for reflecting light around the heating lamp 24 must be installed. In addition, it is also possible to locally heat the object to be heated by adjusting the reflection the angle of the reflective plate 212 or installing a separate light collecting mirror so that the light emitted from the heating lamp 24 is concentrated on a specific area.
The height of the heating lamp 24 is equal to or slightly greater than the height of the stator core 100 so that the heating lamp 24 heats the stator core 100 and does not directly heat the transfer jig 10.
In case the object to be heated is the stator core 100 and a protruding coupling portion 101 is formed on the outer circumferential surface of the stator core 100, when heating is concentrated on the coupling portion 101, thermal deformation may occur in the coupling portion 101 or burning may occur. Thus, a groove 23B may be formed at a part where the coupling portion 101 of the lower support 23 is positioned without having a heating lamp 24 installed so as to reduce the intensity of the light absorbed at the coupling portion 101.
Fig. 7 is a side cross-sectional view illustrating a state in which the stator core 100 is heated in an apparatus 200 for heating a laminated core according to the present invention. Fig. 8 is a cross-sectional view taken along line C-C' of Fig. 7.
Referring to Figs. 7 and 8 together, a blocking plate 24 may be installed in the apparatus 20 for heating a laminated core according to the present invention to cover an upper part of the heating lamp 24. The temperature of the stator core 100 heated by the heating lamp 24 rises as the stator core 100 is heated by the light emitted from the heating lamp 24. Since heat is also transferred internally by induction, and heat tends to rise from the bottom to the top, the temperature of the upper part of the stator core 100 may rise excessively. Therefore, in order to prevent such phenomenon, a plurality of blocking plates 25 are installed on an upper side of the heating lamp 24 so that the heating lamp 24 may heat the upper side of the stator core 100 at a weaker intensity.
The blocking plate 25 may be installed on the upper part of the casing 21 or on the inner circumferential surface of the upper support 22. In addition, a plurality of blocking plates 25 are installed at regular intervals along the inner circumferential surface of the upper support 22. The blocking plate 25 has a height sufficient to cover the upper part of the middle height of the stator core 100, but is not necessarily limited to this structure. The amount of light emitted may be appropriately applied by adjusting the number or height of the blocking plates 25.
The outer surface of the blocking plate 25, that is, the surface facing the heating lamp 24 has a property of reflecting light. Therefore, among the light generated from the heating lamp 24, it is possible to adjust the amount of light directly emitted from the heating lamp 24 at the upper side of the stator core 100 to be smaller than the lower side by reflecting some of the light emitted to the upper side of the stator core 100 so as to prevent the upper part of the stator core 100 from being overheated.
Fig. 9 is a conceptual diagram illustrating various embodiments of heating the laminated core in an apparatus 20 for heating a laminated core according to the present invention. As described above, the present invention adjusts the direction of light generated from the heating lamp 24 so as to achieve local heating.
As described above, Fig. 9(A) is a case of heating the stator core 100. In this case, the light generated from the heating lamp 24 is directly irradiated on the surface of the stator core 100, and the light reflected from the reflective plate 212 is evenly irradiated on the surface of the stator core 100 so that the surface of the stator core 100 is evenly heated.
Fig. 9 (B) illustrates a case of heating the rotor core 200. In this case, the rotor core 200 has a part into which a plurality of magnets are inserted, and thus when high temperature heat is concentrated, the rotor core 200 may be damaged. Therefore, it is possible to adjust the angle at which the light emitted from the heating lamp 24 is reflected by making the reflective plate 212 in the shape of a first curved part 212A so that light can be irradiated more evenly on the surface of the rotor core 200.
According to the shape of the second curved part 212B illustrated in Fig. 9(C), it is possible to allow the light emitted from the heating lamp 24 to be locally concentrated only on a certain part of the rotor core 200. To this end, the shape of the second curved part 212B may be formed on the reflective plate 212, and a separate light collecting mirror (not shown) may be installed on the reflective plate 212.
It should be noted that the description of the present invention described above is merely an example for understanding the present invention, and is not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the accompanying claims, and it should be construed that simple modifications or alternations within the scope of the claims fall within the scope of the present invention.

Claims (9)

  1. An apparatus for heating a laminated core, comprising:
    a casing 21 in which a reflective plate 212 is installed thereinside; and
    a plurality of heating lamps 24 installed in the casing 21 so as to be positioned inside the reflective plate 212 in order to heat the laminated core seated on a transfer jig 10.
  2. The apparatus of claim 1, wherein the plurality of heating lamps 24 are installed between an upper support 22 coupled to an upper part of the casing 21 and a lower support 23 coupled to a lower part of the casing 21.
  3. The apparatus of claim 2, further comprising a heat insulating material 211 installed between the upper support 22 and the lower support 23 on an inner surface of the casing 21, wherein the reflective plate 212 is installed on an inner surface of the heat insulating material 211.
  4. The apparatus of any one of claims 1 to 3, wherein the laminated core is a stator core 100.
  5. The apparatus of claim 4, wherein a groove 23B is formed on a portion where some of the heating lamps 24 are installed among the plurality of heating lamps 24 installed on the lower support 23.
  6. The apparatus of any one of claims 1 to 3, wherein the laminated core is a rotor core 200.
  7. The apparatus of claim 6, wherein a first curved part 212A is formed on the reflective plate 212 so that the rotor core 200 is uniformly heated by reflecting the light emitted from the heating lamp 24.
  8. The apparatus of claim 6, wherein a second curved part 212B is formed on the reflective plate 212 so that the rotor core 200 is locally heated by reflecting the light emitted from the heating lamp 24.
  9. The apparatus of claim 2, further comprising a plurality of blocking plates 25 installed at regular intervals along an inner circumferential surface of the upper support 22.
PCT/KR2023/010080 2022-09-22 2023-07-14 Apparatus for heating laminated core of motor WO2024063283A1 (en)

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Application Number Priority Date Filing Date Title
KR1020220120061A KR20240041026A (en) 2022-09-22 2022-09-22 Apparatus for heating laminated core of motor
KR10-2022-0120061 2022-09-22

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WO2024063283A1 true WO2024063283A1 (en) 2024-03-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016066576A (en) * 2014-09-17 2016-04-28 トヨタ自動車株式会社 Heating method for rotor core, and heating device
JP2020078147A (en) * 2018-11-07 2020-05-21 本田技研工業株式会社 Method of fixing magnet of rotor for rotary electric machine
US20200251441A1 (en) * 2017-01-31 2020-08-06 Shinkawa Ltd. Semiconductor chip mounting apparatus and semiconductor chip mounting method
JP2021058015A (en) * 2019-09-30 2021-04-08 アイシン・エィ・ダブリュ株式会社 Rotor core pressing jig and manufacturing method for rotor core
JP2022128068A (en) * 2021-02-22 2022-09-01 トヨタ自動車株式会社 Rotor manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016066576A (en) * 2014-09-17 2016-04-28 トヨタ自動車株式会社 Heating method for rotor core, and heating device
US20200251441A1 (en) * 2017-01-31 2020-08-06 Shinkawa Ltd. Semiconductor chip mounting apparatus and semiconductor chip mounting method
JP2020078147A (en) * 2018-11-07 2020-05-21 本田技研工業株式会社 Method of fixing magnet of rotor for rotary electric machine
JP2021058015A (en) * 2019-09-30 2021-04-08 アイシン・エィ・ダブリュ株式会社 Rotor core pressing jig and manufacturing method for rotor core
JP2022128068A (en) * 2021-02-22 2022-09-01 トヨタ自動車株式会社 Rotor manufacturing method

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