CN114629308B - Motor core manufacturing device - Google Patents
Motor core manufacturing device Download PDFInfo
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- CN114629308B CN114629308B CN202011469479.5A CN202011469479A CN114629308B CN 114629308 B CN114629308 B CN 114629308B CN 202011469479 A CN202011469479 A CN 202011469479A CN 114629308 B CN114629308 B CN 114629308B
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- motor core
- core
- cooling
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- motor
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 149
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000012546 transfer Methods 0.000 claims description 43
- 230000002093 peripheral effect Effects 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 3
- 239000011162 core material Substances 0.000 description 308
- 238000000034 method Methods 0.000 description 13
- 238000003825 pressing Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000014509 gene expression Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 238000010583 slow cooling Methods 0.000 description 3
- 229920001342 Bakelite® Polymers 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The present invention relates to a motor core manufacturing apparatus. Specifically, according to an embodiment of the present invention, there may be provided a motor core manufacturing apparatus including: a cooling unit cooling the motor core heated by the heating unit to a predetermined temperature; and a control unit that controls operations of the heating unit and the cooling unit, wherein a first cooling passage for moving the motor core and a second cooling passage that can communicate with the first cooling passage are formed in the cooling unit, the control unit controlling the cooling unit such that the motor core is cooled to a preset first temperature range during passage through the first cooling passage, and the motor core is cooled to a preset second temperature range during passage through the second cooling passage, the second temperature range being lower than the first temperature range.
Description
Technical Field
The present invention relates to a motor core manufacturing apparatus.
Background
In general, a MOTOR (MOTOR) is configured to include a Stator (STATOR) and a ROTOR (ROTOR), and the stator and the ROTOR are manufactured by stacking a plurality of stator cores and ROTOR cores (hereinafter referred to as "MOTOR cores") respectively. In addition, a motor core is manufactured by laminating a plurality of core films.
As a conventional method of laminating core films, a method of molding a plurality of core films on a mold for manufacturing a motor core, then stacking them and pressurizing them with a press is used. In the process of pressurizing by a press machine, embossments (embow) extending from the bottom surface of the core film and embossment locking grooves on the upper surface corresponding to the embossments are formed in the core film, and a plurality of core films are combined with embossments of adjacent core films and the embossment locking grooves. In other words, the plurality of core films are combined in an interlocking (interlocking) manner.
In addition, the core film may be laminated not only by such a mechanical method, but also by a heating/cooling process after the accelerator is applied to the Self-adhesive (Self-Bonding) surface of the core film. At this time, a curing accelerator is coated on the core film for more effective bonding. In addition, after an adhesive (Bond) cured by heating is coated on the surface between the core films, the films may be laminated by a heating/cooling process.
In addition, when the motor core is generated, the motor core is heated to increase the fastening force between the core films and then cooled, and when the motor core is cooled once at a low temperature, the fastening force between the motor core films is weakened. In addition, when the motor core is cooled at a low temperature, deterioration of the quality of the motor core such as cracks (cracks) in the motor core may occur.
Therefore, a technique is required that can prevent the lowering of the fastening force between the core films while cooling the motor core, and improve the quality of the motor core.
Patent literature
Patent document 1 Korean patent laid-open publication No. 10-1950993 (2019.02.22. Bulletin)
Disclosure of Invention
The present invention has been made in view of the above background, and an object of the present invention is to provide a motor core device capable of preventing a reduction in fastening force between core films when cooling a motor core.
Further, an object of the present invention is to provide a motor core device capable of improving the quality of a motor core by preventing cracks from occurring in the motor core when the motor core is cooled.
According to an aspect of the present invention, there may be provided a motor core manufacturing apparatus including: a mold block including an upper mold and a lower mold disposed facing the upper mold; a pressure module connected to the mold module and laminating a core film to create a motor core; an accelerator spray module for applying a curing accelerator to a surface of the core film; the molding module comprises a first coil module, a heating device and a lifting plate, wherein first alternating current can flow through the first coil module, the heating device enables induction current based on the first alternating current to flow in the motor core so as to heat the motor core, and the lifting plate is arranged on the lower die in a lifting manner so as to enable the heated motor core to move downwards in the lower die; a heating unit including a first coil through which an internal alternating current can flow and a second coil through which an external alternating current can flow, the heating unit causing an induced current based on the internal alternating current and the external alternating current to flow through the motor core that has been moved by the lifter plate to heat the motor core; a cooling unit cooling the motor core heated by the heating unit to a predetermined temperature; and a control unit that controls operations of the heating unit and the cooling unit, wherein a first cooling passage for moving the motor core and a second cooling passage communicable with the first cooling passage are formed in the cooling unit, the control unit controlling the cooling unit such that the motor core is cooled to a preset first temperature range during passage through the first cooling passage, and the motor core is cooled to a preset second temperature range during passage through the second cooling passage, the second temperature range being lower than the first temperature range.
In addition, there may be provided the motor core manufacturing apparatus further comprising a transfer device that transfers the motor core so that the motor core sequentially passes through the heating unit and the cooling unit, the control portion controlling the transfer device so that a time for which the motor core stays in the first cooling passage is the same as a time for which the motor core stays in the second cooling passage, and controlling the cooling unit so as to supply a first gas to the first cooling passage and a second gas having a second cooling temperature to the second cooling passage, the temperature of the second gas being lower than that of the first gas.
In addition, there may be provided a motor core manufacturing apparatus, wherein the cooling unit includes: a blocking wall in which a communication port is formed, the communication port communicating the first cooling passage and the second cooling passage; and an opening and closing portion that selectively opens and closes the communication port, the control portion controlling the opening and closing portion such that the communication port is opened when the motor core is located within a predetermined distance from the opening and closing portion, and the communication port is blocked when the motor core is not located within a predetermined distance from the opening and closing portion.
Further, there may be provided a motor core manufacturing apparatus further comprising a transfer device that can transfer the power core in one direction so that the inner peripheral surface and the outer peripheral surface of the motor core can be heated in order, wherein the first coil heats the motor core by causing an induced current based on the internal alternating current to flow through the motor core on the inner peripheral surface side of the motor core, and the second coil heats the motor core by causing an induced current based on the external alternating current to flow through the motor core on the outer peripheral surface side of the motor core, and wherein the control section controls the heating unit so that the outer peripheral surface of the motor core is heated by the second coil after the inner peripheral surface of the motor core is heated by the first coil until a point in time at which the temperature of the inner peripheral surface and the temperature of the outer peripheral surface reach equilibrium, and wherein the transfer device is controlled so as to transfer the motor core, in which the inner peripheral surface has been heated by the first coil, to the second coil.
According to the present invention, when the motor core is cooled, there is an effect of preventing a decrease in fastening force between the core films.
In addition, by preventing cracks from being generated in the motor core when the motor core is cooled, there is an effect of improving the quality of the motor core.
Drawings
FIG. 1 is a top view of a front end portion according to an embodiment of the present invention;
FIG. 2 is a top view of a rear end portion according to an embodiment of the invention;
FIG. 3 is a top view of a motor core film according to one embodiment of the invention;
FIG. 4 is a cross-sectional view of a core support module according to an embodiment of the invention;
FIG. 5 is an exploded cross-sectional view of a core support module according to an embodiment of the invention;
fig. 6 is a top view schematically showing a cooling unit according to an embodiment of the present invention.
Reference numerals:
1: a motor core manufacturing device; 100: a motor core;
110: a core film; 200: a front end portion;
210: a mold module; 211: an upper mold;
212: a lower mold; 220: a pressure module;
221: a pressure punch; 222: a pressure die;
230: a molding module; 231: a cooling device;
231a: cooling the nozzle; 231b: a pressing ring;
232: a heating device; 232a: a first coil module;
232b: a guide section; 233: a first cooling plate;
234: second cooling plate 235: a lifting plate;
236: an actuator; 240: an accelerator injection module;
241: a promoter spray nozzle; 242: a quantitative discharge valve;
243: an accelerator box; 300: a rear end portion;
310: a heating unit; 311: a first coil;
312: a second coil; 320: a core support module;
321: a first plate; 321a: a first fastening hole;
322: a second plate; 322a: a second fastening hole;
325: a bushing; 330: a cooling unit;
331: a first cooling passage; 332: a second cooling passage;
333: a blocking wall; 333a: a communication port;
334: an opening/closing section; 340: a transfer device;
341: a first transfer unit; 342: a second transfer section;
350: control unit
Detailed Description
Hereinafter, specific embodiments for realizing the spirit of the present invention will be described in detail with reference to the accompanying drawings.
When it is judged that a detailed description of a known constitution or function related to the present invention may obscure the gist of the present invention, a detailed description thereof will be omitted.
In addition, when one component is "connected," "supported," "contacted," or "coupled" to another component, it can be directly connected, supported, contacted, coupled to the other component, although it should be understood that other components may be present in the middle.
The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.
In addition, terms including ordinal numbers such as first, second, etc. may be used to describe various components, but the corresponding components are not limited by these terms. These terms are only used for distinguishing one component from another.
The meaning of "comprising" in the specification is intended to specify the presence of stated features, regions, integers, steps, actions, elements, and/or components, but does not preclude the presence or addition of other features, regions, integers, steps, actions, elements, components, and/or groups thereof.
In addition, in this specification, expressions such as upper, lower, etc. are descriptions based on illustrations in the drawings, and it should be noted in advance that if the direction of the object is changed, they may have different expressions. In the present specification, on the other hand, the thickness direction may be the up-down direction of fig. 1, and the axial direction may be the axial direction of the motor core 100 of fig. 5. In addition, the width direction may be a direction extending from the inner diameter to the outer diameter of the core film 110 of fig. 3.
Hereinafter, a specific structure of the motor core manufacturing apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.
Hereinafter, referring to fig. 1 to 5, a motor core manufacturing apparatus 1 according to an embodiment of the present invention processes and punches a core film using a core material as a material of a motor core 100, so that the motor core 100 can be produced. Such a motor core manufacturing apparatus 1 may include a motor core 100, a front end portion 200, and a rear end portion 300.
The motor core 100 may be a rotor core or a stator core. The material of such a motor core 100 can be sequentially processed into individual core films 110 while passing through the motor core manufacturing apparatus 1. A curable resin or an adhesive (bond) may be applied to the upper and/or lower surfaces of the core film 11, and the plurality of core films 110 may be manufactured into the motor core 100 through lamination and punching processes. The motor core 100 cut by the pressure module 220 described later may be formed in a ring shape such that a circulating current flows inside the motor core 100. Further, the motor core 100 cut by the pressure module 220 may have a predetermined width such that the circulation current flowing on the outer diameter side and the circulation current flowing on the inner diameter side are different from each other. For example, the width of the motor core 100 may be 20cm or more and 200cm or less.
The front end 200 may process a single core film 110 and stamp the single core film 110 to produce the motor core 100. Such a front end 200 may include a mold module 210, a pressure module 220, a shaping module 230, and an accelerator injection module 240.
The mold module 210 may support a pressure module 220, a shaping module 230, and an accelerator injection module 240. Such a mold module 210 may include an upper mold 211 and a lower mold 212.
The pressure module 220 may generate the motor core 100 by laminating the core film 110. In other words, the pressure module 220 may generate the motor core 100 by cutting the core film 110 in the thickness direction of the core film 110. In addition, the pressure module 220 may be connected to the mold module 210. Such a pressure module 220 may include a pressure punch 221 and a pressure die 222.
A plurality of press punches 221 and press dies 222 capable of forming the core film 110 may be provided, respectively, so that the plurality of press punches 221 and press dies 222 may be disposed apart from each other on the operation path of moving the core film 11. Such a press punch 221 and a press die 222 may be provided in the upper die 211 and the lower die 212, respectively.
The molding module 230 may heat and cool the motor core 100 generated by the pressure module 220 and then discharge it to the outside of the lower mold 212. Such a forming module 230 may include a heating device 232, a cooling device 232, and a lifter plate 235. The molding module 230 cools the motor core 100 by the cooling device 231, heats the cooled motor core 100 by the heating device 232, transfers the heated motor core 100 to the bottom dead center by the lifting plate 235, and then can discharge the motor core 100 transferred by the actuator 236 to the outside of the lower mold 212.
The cooling device 231 may cool the motor cores 100 continuously input from the pressure module 220. In addition, the cooling device 231 may cool the motor core 100 during the descent of the motor core 100. Such cooling means 232 may comprise a cooling nozzle 231a and a pressing ring 231b.
The cooling nozzle 231a may cool the outer circumferential surface of the motor core 100. Such a cooling nozzle 231a may be provided at an upper side of the heating device 232, and the heating device 232 may be prevented from overheating the motor core 100 in advance. The cooling nozzle 231a may be in the form of an air cooler.
The pressing ring 231b can prevent the motor core 100 from falling off during passing through the cooling device 231. Such a pressing ring 231b may have a ring shape, and an inner circumferential surface of the pressing ring 231b may be in surface contact with an outer circumferential surface of the motor core 100. In addition, the shape of the inner circumferential surface of the pressing ring 231b may correspond to the shape of the outer circumferential surface of the motor core 100. For example, a groove may be formed on the inner circumferential surface of the pressing ring 231b, and a protrusion may be formed on the outer circumferential surface of the motor core 100, which may be interposed in the groove formed on the inner circumferential surface of the pressing ring 231 b. In other words, the motor core 100 is not dropped due to contact with the inner circumferential surface of the pressing ring 231b, but can be moved downward by pressing another motor core 100 stacked on the upper portion of the motor core 100. In addition, a predetermined friction force may act between such a pressing ring 231b and the motor core 100, and due to such friction force, the motor core 100 may be prevented from arbitrarily falling down within the pressing ring 231 b.
The heating device 232 may heat the motor core 100 passing through the cooling device 231. In addition, the heating device 232 may be disposed at the lower side of the cooling device 231. Such a heating device 232 may heat the motor core 100 during the descent of the motor core 100 cooled by the cooling device 231 from the cooling device 231. Such heating means 232 may be provided within the lower die 212. In addition, the heating device 232 may include a first coil module 232a and a guide portion 232b.
The first coil module 232a may be provided on the outer circumferential surface side of the motor core 100, and may be a ring-shaped coil. The first alternating current may flow through the first coil module 232a, and the motor core 100 may be heated by flowing an induced current based on the first alternating current through the outer circumferential surface of the motor core 100. For example, the temperature of the motor core 100 heated by the first coil module 232a may be 70 ℃ to 150 ℃ inclusive. In addition, the first alternating current flowing through the first coil module 232a may have a frequency of 10Khz to 25 Khz.
The guide 232b may align the motor cores 100 coated with the accelerant before heating the motor cores 100 by the first coil module 232 a. In other words, the guide portion 232b may be in surface contact with the outer peripheral surface of the motor core 100. Such a guide portion 232b may be disposed inside the first coil module 232a, and the motor core 100 may be disposed inside the guide portion 232 b. In addition, the guide portion 232b may be made of a non-conductive material to prevent heating by the first coil module 232 a. For example, the guide 232b may be made of a material such as ceramics, teflon, bakelite (bakelite), or the like. The shape of the inner peripheral surface of such a guide portion 232b may correspond to the shape of the outer peripheral surface of the motor core 100 to prevent the motor core 100 from falling off. For example, a groove may be formed on the inner peripheral surface of the guide portion 232b, and a protrusion may be formed on the outer peripheral surface of the motor core 100, which may be interposed in the groove formed on the inner peripheral surface of the guide portion 232 b. In other words, the motor core 100 does not fall due to contact with the inner peripheral surface of the guide portion 232b, but can be moved downward by pressurizing another motor core 100 stacked on the upper portion of the motor core 100. In addition, the motor core 100 separated from the guide portion 232b may fall and may be supported on the upper surface of the elevation plate 235. In addition, a predetermined friction force may act between such guide portion 232b and the motor core 100, and due to such friction force, the motor core 100 may be prevented from arbitrarily freely falling within the guide portion 232 b.
The first and second cooling plates 233 and 234 may prevent heat conduction between the first coil module 232a and the lower mold 212. Such a first cooling plate 233 may be disposed at an upper portion of the first coil module 232a, and a second cooling plate 234 may be disposed at a lower portion of the first coil module 232 a.
The lifting plate 235 may move the motor core 100 heated by the heating device 232 to a bottom dead center. An upper surface of such a lifter plate 235 may support the motor core 100, and another actuator (not shown) for raising or lowering the lifter plate 235 may be drivingly connected to a lower surface of the lifter plate 235. For example, the actuator may be provided as a hydraulic cylinder. In addition, a lifter plate 235 may be disposed inside the lower mold 212. The motor core 100 moved to the bottom dead center may be discharged to the outside of the lower mold 212 through another device.
The actuator 236 may eject the motor cartridge 100 to the exterior of the lower mold 212. In other words, the actuator 236 may push the motor core 100 that moves from the lifter plate 235 to the bottom dead center, thereby discharging it to the outside of the lower mold 212.
The accelerator spray module 240 may apply a curing accelerator to the surface of the core film 110. Such an accelerator injection module 240 may include an accelerator injection nozzle 241, a metering valve 242, and an accelerator tank 243.
The accelerator spray nozzle 241 can apply the accelerator to the surface of the motor core 100 at 30% or less of the area of the motor core 100. The arrangement of such accelerator spray nozzles 241 may be changed according to the shape of the motor core 100, and the number of accelerator spray nozzles 241 may be plural. In addition, depending on the shape of the motor core 100, the accelerator spray nozzle 241 may have a hemispherical upper surface, and a portion of the upper surface may be a straight line.
The metering valve 242 may receive the accelerator from the accelerator tank 243 and flow it to the accelerator spray nozzle 241. Such a metering valve 242 may be disposed spaced apart from the accelerator spray nozzle 241 by a predetermined distance such that pre-compression within the connecting hose is minimized.
The accelerator tank 243 may supply accelerator to the metering valve 242 under pressure. The speed at which the accelerator is injected from such accelerator tank 243 to the quantitative discharge valve 242 may be different depending on the viscosity of the accelerator.
The rear end 300 heats the motor core 100 in a high frequency manner after the motor core 100 generated from the front end 200 is aligned, whereby the fastening force of the motor core 100 can be improved. Such a rear end 300 may be a subsequent process of the front end 200. In addition, the rear end 300 may include a heating unit 310, a core support module 320, and a cooling unit 330.
With further reference to fig. 2, the heating unit 310 may heat the motor core 100 by flowing an induced current based on the second alternating current through the motor core 100 discharged from the lower mold 212. Such a heating unit 310 may include a first coil 311 and a second coil 312. The heating unit 310 may be driven to heat the inner circumferential surface of the motor core 100 first by the first coil 311 and then to heat the outer circumferential surface by the second coil 312. The heating unit 310 may heat the motor core 100 for a period of time of 120 seconds to 180 seconds through the first coil 311 and the second coil 312.
The first coil 311 can heat the motor core 100 by causing an induced current based on an internal alternating current to flow through the inner peripheral surface side of the motor core 100. Such a first coil 311 may be selectively inserted into the inside of the motor core 100 to heat the inner circumferential surface of the motor core 100. For example, the first coil 311 may be a heating coil through which an internal alternating current may flow. As described above, when the internal alternating current flows through the first coil 311, a magnetic field is generated, and an induced current can be generated in the motor core 100 by the magnetic field generated by the first coil 311. In addition, the first coil 311 may make the induced current flowing through the inner peripheral surface side of the motor core 100 larger than the induced current flowing through the outer peripheral surface side of the motor core 100. The time for heating the motor core 100 by the first coil 311 at the time of driving may be the same as the time for heating the motor core 100 by the second coil 312.
The second coil 312 can heat the motor core 100 by causing an induced current based on an external alternating current to flow through the outer peripheral surface side of the motor core 100. Such a second coil 312 may selectively surround the outside of the motor core 100 to heat the outer circumferential surface of the motor core 100. For example, the second coil 312 may be a heating coil through which an alternating current may flow. As described above, when an alternating current flows through the second coil 312, a magnetic field is generated, and an induced current can be generated in the motor core 100 by the magnetic field generated by the second coil 312. In addition, the second coil 312 may make the induced current flowing through the outer peripheral surface side of the motor core 100 larger than the induced current flowing through the inner peripheral surface side of the motor core 100. The second coil 312 may heat the motor core 100 until a point in time when the temperature of the inner circumferential surface of the motor core 100 and the temperature of the outer circumferential surface of the motor core 100 reach equilibrium. For example, the temperature of the motor core 100 when the temperature of the inner peripheral surface and the temperature of the outer peripheral surface of the motor core 100 reach equilibrium may be 200 ℃ to 220 ℃. In addition, at least one of the internal alternating current flowing through the first coil 311 and the external alternating current flowing through the second coil 312 may have a frequency of 10Khz to 25 Khz.
On the other hand, the heating unit 310 may further include an infrared temperature sensor (not shown) that may measure the temperature of the motor core 100 heated by the first coil 311 and the second coil 312. The temperature of the motor core 100 measured by such an infrared temperature sensor may be transmitted to the control part 350.
With further reference to fig. 3-4, the core support module 320 may align and support the motor core 100 during the period in which the motor core 100 is heated by the heating unit 310. In other words, the motor core 100 may maintain a tight connection during the inter-transfer of the heating unit 310 through the core support module 320. Such a core support module 320 may include a first plate 321, a second plate 322, an inner diameter guide 323, a fastening portion 324, and a bushing 325.
The first plate 321 may be connected to one side of the motor core 100 and may support the motor core 100. A central portion of such a first plate 321 may be opened. In addition, the first fastening hole 321a may be formed at an edge of the first plate 321 along a circumferential direction of the first plate 321. Such first fastening holes 321a may be plural.
The second plate 322 may be connected to the other side of the motor core 100 and may support the motor core 100. The center portion of such a second plate 322 may be open. In addition, the second fastening holes 322a may be formed at the edge of the second plate 322 along the circumferential direction of the second plate 322. The number of such second fastening holes 322a may correspond to the number of first fastening holes 321 a.
The inner diameter guide 323 may contact and support the inner circumferential surface of the motor core 100. In addition, the inner diameter guide 323 may be formed to extend in the axial direction, and may be connected to the second plate 322. For example, the inner diameter guide 323 may be inserted along the inner circumferential surface of the motor core 100, and may support the inner side of the motor core 100. After the motor core 100 is aligned between the first plate 321 and the second plate 322 and the first plate 321 and the second plate 322 are connected by the fastening portion 324, such an inner diameter guide 323 can be removed from the inside of the motor core 100.
The fastening portion 324 may connect the first plate 321 and the second plate 322 such that the core support module 320 may fix and support the motor core 100. Such fastening portion 324 may include a fastener 324a and a fastening guide pin 324b.
When the fastening guide pin 324b is inserted into the first fastening hole 321a, the fastening member 324a may be coupled to one side of the fastening guide pin 324b inserted into the first plate 321. For example, the fastener 324a may be nut-shaped. The number of the fastening pieces 324a may correspond to the number of the first fastening holes 321 a.
The fastening guide pin 324b may contact and support the outer circumferential surface of the motor core 100. Such fastening guide pins 324b may be inserted into the first fastening holes 321a and the second fastening holes 322 a. For example, a screw thread may be formed at one side of the fastening guide pin 324b inserted into the first plate 321 so that it may be coupled to the fastening member 324a. In addition, the number of fastening guide pins 324b may correspond to the number of first fastening holes 321 a.
The bushing 325 may prevent the shaking of the fastening guide pin 324b when the fastening guide pin 324b is inserted into the first fastening hole 321 a. Such a bushing 325 may be inserted into the first fastening hole 321 a. In addition, the number of bushings may correspond to the number of first fastening holes 321 a.
Referring to fig. 6, the cooling unit 330 may cool the motor core 100 transferred through the heating unit 310. Such a cooling unit 330 may quench the motor core 100 after slowly cooling it to a predetermined temperature. In the present specification, the slow cooling of the motor core 100 means that the motor core 100 is cooled to a temperature higher than the temperature of the quenching section, instead of slowly cooling the motor core 100 for a long time. The quenching motor core 100 does not mean that the motor core 100 is cooled rapidly in a short time, but that the motor core 100 is cooled to a temperature lower than that in the slow cooling zone. In addition, the cooling unit 330 may cool the motor core 100 at different temperatures from each other in the section of the slow cooling motor core 100 and the section of the quench motor core 100. For example, the cooling unit 330 may be a unit capable of cooling the gist of the motor core 100, such as an air cooler or a cooling nozzle. The first cooling passage 331 and the second cooling passage 332 may be formed in such a cooling unit 330.
The first cooling passage 331 may provide a passage through which the motor core 100 moves. During passage through such a first cooling passage 331, the motor core 100 may be cooled to a preset first temperature range. For example, the first temperature range may be 90 ℃ to 110 ℃. In addition, a first gas having a first cooling temperature may be provided to the first cooling passage 331 to cool the motor core 100. For example, the first cooling temperature may be 90 ℃ to 110 ℃. Wherein the meaning of providing the first gas having the first cooling temperature not only means to supply the first gas having the first cooling temperature to the first cooling passage 331 but also includes a concept of adjusting the temperature of the gas staying in the first cooling passage 331 to the first cooling temperature.
The second cooling passage 332 may provide a passage through which the motor core 100 of the first cooling passage 331 moves. During passage through such a second cooling passage 332, the motor core 100 may be cooled to a preset second temperature range. Such a second temperature range may be lower than the first temperature range. For example, the second temperature range may be 20 ℃ to 30 ℃. In addition, a second gas having a second cooling temperature may be provided to the second cooling passage 332. For example, the second cooling temperature may be 20 ℃ to 30 ℃. Wherein the meaning of providing the second gas having the second cooling temperature not only means to supply the second gas having the second cooling temperature to the second cooling passage 332, but also includes a concept of adjusting the temperature of the gas staying in the second cooling passage 332 to the second cooling temperature.
In this way, the motor core 100 is first cooled down to a lower temperature after being cooled down once in a temperature range of normal temperature, so that the adhesion between the core films 110 is maintained, and the generation of cracks (cracks) in the motor core 100 can be prevented. For example, if the motor core 100 is not cooled in a two-stage temperature range but is cooled at a sub-zero temperature by one pass, the core films 110 may be separated because the adhesion between the core films 110 cannot be maintained. In addition, the quality of the motor core 100 may be degraded such as the occurrence of cracks in the motor core 100. However, if the motor core 100 is subjected to secondary cooling after being subjected to primary cooling in a temperature range of normal temperature, there is an effect that the adhesion between the core films 110 is maintained and the generation of cracks (cracks) in the motor core 100 can be prevented.
On the other hand, the cooling unit 330 may include a blocking wall 333 blocking the first cooling passage 331 and the second cooling passage 332.
The blocking wall 333 may block between the first cooling passage 331 and the second cooling passage 332. A material that can prevent heat exchange between the first cooling passage 331 and the second cooling passage 332 may be used as such a blocking wall 333. In addition, a communication port 333a that can communicate the first cooling passage 331 with the second cooling passage 332 may be formed in the blocking wall 333.
The opening/closing portion 334 selectively opens/closes the communication port 333a. That is, the opening/closing portion 333a selectively communicates the first cooling passage 331 with the second cooling passage 332 by opening/closing the communication port 333a. For example, the opening/closing portion 334 blocks the communication port 333a while the motor core 100 passes through the first cooling passage 331. When the motor core 100 reaches the distance adjacent to the opening/closing portion 334 after being cooled to the first temperature range in the first cooling passage 331, the opening/closing portion 334 opens the communication port 333a. As a more detailed example, when the plurality of motor cores 100 pass through the first cooling passage 331, the opening and closing portion 334 may open and close the communication port 333a corresponding to the interval between the plurality of motor cores 100. Such an operation of the opening/closing portion 334 can be controlled by the control portion 350.
On the other hand, a distance detection sensor (not shown) capable of detecting whether or not the motor core 100 is located within a predetermined distance from the opening/closing portion 333a may be provided in the opening/closing portion 333 a.
The transfer device 340 may transfer the motor core 100 such that the motor core 100 discharged from the lower mold 212 passes through the heating unit 310 and the cooling unit 330. For example, the transfer device 340 may be a conveyor (conveyor). Such transfer device 340 may include a first transfer portion 341 and a second transfer portion 342.
The first transfer portion 341 may move the power core 100 in one direction to pass the motor core 100 discharged from the lower die 212 through the heating unit 310. For example, the motor core 100 moving along the first transfer portion 341 may be heated while passing through the first coil 311 and the second coil 312 in order. Accordingly, the inner circumferential surface and the outer circumferential surface of the motor core 100 moving along the first transfer portion 341 may be sequentially heated. The time for moving the power transmitter core 100 within the section of the heating unit 310 by such a first transfer portion 341 may be between 2 minutes and 5 minutes. In addition, the first transfer portion 341 may transfer the heated motor core 100 to the second transfer portion 342.
The second transfer part 342 may transfer the motor core 100 to pass the motor core 100 heated in the heating unit 310 through the cooling unit 330. For example, the motor core 100 moving along the second transfer portion 342 may be cooled while passing through the first cooling passage 331 and the second cooling passage 332 in order. Therefore, the motor core 100 moving along the second transfer portion 342 may be gradually cooled to the first temperature range and then quenched to the second temperature range. The time for moving the power transmitter core 100 in the first cooling passage 331 and the second cooling passage 332 by the second transfer portion 342 may be 50 minutes to 70 minutes, respectively. In addition, the second transfer portion 342 may discharge the cooled motor core 100 to the outside.
The control part 350 may control the operation of the heating unit 310. In other words, the control part 350 may control the first coil 311 and the second coil 312 according to the temperature of the motor core 100. For example, when the heating unit 310 heats the outer circumferential surface after heating the inner circumferential surface of the motor core 100, a temperature difference may occur between the inner circumferential surface and the outer circumferential surface of the motor core 100. In this case, the control portion 350 may stop heating at a point in time when the temperature of the outer surface and the temperature of the inner circumferential surface of the motor core 100 reach equilibrium. Such a control part 350 may control the heating unit 310 based on the temperature of the motor core 100 measured by the infrared temperature sensor.
The control unit 350 may control the operation of the cooling unit 330. Such a control part 350 may control the cooling unit 330 such that the temperature of cooling differs according to the position of the motor core 100. For example, the control part 350 may control the cooling unit 330 such that the motor core 100 is cooled to the first cooling temperature when the motor core 100 passes through the first cooling passage 331. In addition, when the motor core 100 passes through the second cooling passage 332, the cooling unit 330 may be controlled such that the motor core 100 is cooled to the second cooling temperature. Further, the control unit 350 may control the operation of the opening/closing unit 333a so that the opening/closing unit 334 selectively opens/closes the communication port 333a. For example, when the motor core 100 is detected by the distance detection sensor, the control section 350 may control the opening and closing section 333a such that the opening and closing section 333a opens the communication port 333a.
The control part 350 may control the transfer device 340 such that the transfer device 340 transfers the motor core 100. In other words, the transfer speed of the motor core 100 may be controlled during the passage of the motor core 100 through the heating unit 310 and the cooling unit 330. On the other hand, the control unit 350 may be implemented by a measuring device including a microprocessor, a sensor, and the like, and a memory, and a method of implementation thereof will be apparent to those skilled in the art, so that further detailed description thereof will be omitted.
Hereinafter, the operation and effects of the motor core manufacturing apparatus 1 having the above-described configuration will be described.
The user can manufacture the motor core 100 using the motor core manufacturing apparatus 1. The core material as the material of the motor core 100 may be put into the motor core manufacturing apparatus. Such core material is processed into a single core film 110 while passing through the pressure module 220, and an adhesive may be applied to the processed core film 110. The accelerator spraying module 240 may dissolve the applied adhesive by spraying the accelerator onto the core film 110. A portion of the adhesive may be advanced to dissolve the core film 110 and then laminated and punched in the lower die 212 to form the motor core 100. After the outer peripheral surface of such a motor core 100 is cooled through the cooling nozzle 231a, the outer peripheral surface may be heated through the heating device 232. The heated motor core 100 may be transferred to the bottom dead center by the elevating plate 235 and then discharged to the outside by another actuator.
The motor cores 100 discharged to the outside may be aligned and supported by the core support module 320. After the motor cores 100 are aligned by the core support module 320, the inner diameter guide 323 may be removed from the inner side of the motor cores 100. The entire array of motor cores 100 may be transferred to the heating unit 310 by the transfer device 340. The inner side of the transferred motor core 100 is heated by the internal ac current flowing through the first coil 311, and then the outer side of the motor core 100 is heated by the external ac current flowing through the second coil 312. The heated motor core 100 may be transferred to the cooling unit 330 by the transfer device 340.
The motor core 100 transferred to the cooling unit 330 may be cooled to the first temperature range while passing through the first cooling passage 331. Thereafter, when the motor core 100 is moved to a position adjacent to the opening and closing part 333a, the opening and closing part 333a may open the communication port 333a. In addition, the motor core 100 may be cooled to the second temperature range while passing through the second cooling passage 332, and thus discharged.
In this way, when the motor core 100 is cooled down to a lower temperature after being cooled down once in a temperature range of normal temperature, there is an effect that the adhesion between the core films 110 can be maintained, preventing generation of cracks (cracks) in the motor core 100.
The motor core manufacturing apparatus 1 can be heated by the induction current flowing through the first coil module 232a, the first coil 311, and the second coil 312, and can shorten the heating process time as compared with the conventional hot air method. In addition, in the front end part 200 process, lamination is performed after the accelerator is coated between the core films 110, so that the motor core 100 of high fastening force can be manufactured, and in the rear end part 300 process, the plurality of motor cores 100 supported by the core support module 320 are heated, so that there is an effect of improving fastening force between the motor cores 100.
The embodiments of the present invention have been described above in the form of specific embodiments, but these are merely examples, to which the present invention is not limited and should be interpreted as having the broadest scope according to the basic idea disclosed in the present specification. Those skilled in the art can combine/replace the disclosed embodiments to implement patterns of unspecified shapes without departing from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it should be clear that such changes or modifications also belong to the scope of the present invention.
Claims (4)
1.A motor core manufacturing device is characterized in that,
Comprising the following steps:
A mold block including an upper mold and a lower mold disposed facing the upper mold;
a pressure module connected to the mold module and laminating a core film to create a motor core;
An accelerator spray module for applying a curing accelerator to a surface of the core film;
The molding module comprises a first coil module, a heating device and a lifting plate, wherein first alternating current can flow through the first coil module, the heating device enables induction current based on the first alternating current to flow through the motor core so as to heat the motor core, and the lifting plate is arranged on the lower die in a lifting manner, so that the heated motor core moves downwards in the lower die;
a heating unit including a first coil through which an internal alternating current can flow and a second coil through which an external alternating current can flow, the heating unit causing an induced current based on the internal alternating current and the external alternating current to flow through the motor core that has been moved by the lifter plate to heat the motor core;
a cooling unit cooling the motor core heated by the heating unit to a predetermined temperature;
A control unit that controls operations of the heating unit and the cooling unit; and
A transfer device that transfers the motor core so that the motor core passes through the cooling unit;
A first cooling passage for moving the motor core and a second cooling passage capable of communicating with the first cooling passage are formed in the cooling unit,
The control portion controls the cooling unit such that the motor core is cooled to a preset first temperature range during passage through the first cooling passage, and the motor core is cooled to a preset second temperature range during passage through the second cooling passage;
The control section controls the transfer device so that the motor core stays in the first cooling passage for the same time as the second cooling passage;
the second temperature range is lower than the first temperature range.
2. The motor core manufacturing apparatus according to claim 1, wherein,
The control portion controls the cooling unit to supply a first gas to the first cooling passage and a second gas having a second cooling temperature to the second cooling passage,
The temperature of the second gas is lower than the temperature of the first gas.
3. The motor core manufacturing apparatus according to claim 2, wherein,
The cooling unit includes:
a blocking wall in which a communication port is formed, the communication port communicating the first cooling passage and the second cooling passage; and
An opening/closing section that selectively opens/closes the communication port,
The control portion controls the opening and closing portion such that the communication port is opened when the motor core is located within a predetermined distance from the opening and closing portion, and the communication port is blocked when the motor core is not located within a predetermined distance from the opening and closing portion.
4. The motor core manufacturing apparatus according to claim 1, wherein,
Further comprising a transfer device capable of transferring the power core in one direction so that the inner peripheral surface and the outer peripheral surface of the motor core can be heated in sequence,
The first coil heats the motor core by causing an induced current based on the internal alternating current to flow through the motor core on the inner peripheral surface side of the motor core,
The second coil heats the motor core by causing an induced current based on the external alternating current to flow through the motor core on the outer peripheral surface side of the motor core,
The control section controls the heating unit so that, after the inner peripheral surface of the motor core is heated by the first coil, the outer peripheral surface of the motor core is heated by the second coil until a point in time at which the temperature of the inner peripheral surface and the temperature of the outer peripheral surface reach equilibrium,
The transfer device is controlled to transfer the motor core, which has been heated by the first coil, to the second coil.
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| JP5624942B2 (en) * | 2011-05-27 | 2014-11-12 | 日立オートモティブシステムズ株式会社 | Rotating electric machine and manufacturing method thereof |
| JP5486036B2 (en) * | 2012-04-11 | 2014-05-07 | ファナック株式会社 | Electric motor having a rotor structure for preventing problems due to distortion caused by temperature change and method for manufacturing the same |
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| JP2001338824A (en) * | 2000-05-26 | 2001-12-07 | Nkk Corp | Method of manufacturing laminated iron core |
| CN102259118A (en) * | 2011-07-01 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | Method for improving cooling uniformity of rolling piece and device for uniformly cooling rolling piece |
| CN106660357A (en) * | 2014-07-08 | 2017-05-10 | 株式会社Posco Tmc | Apparatus for producing bonded-type stacked core member using high-frequency heat and laminate unit therefor |
| KR101950993B1 (en) * | 2017-10-19 | 2019-02-22 | 주식회사 고아정공 | Motor core, apparatus for manufacturing motor core and method thereof |
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