CN114629308A - Motor core manufacturing device - Google Patents
Motor core manufacturing device Download PDFInfo
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- CN114629308A CN114629308A CN202011469479.5A CN202011469479A CN114629308A CN 114629308 A CN114629308 A CN 114629308A CN 202011469479 A CN202011469479 A CN 202011469479A CN 114629308 A CN114629308 A CN 114629308A
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- motor core
- cooling
- core
- 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 59
- 239000010408 film Substances 0.000 claims description 44
- 238000012546 transfer Methods 0.000 claims description 42
- 238000004891 communication Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 2
- 239000011162 core material Substances 0.000 description 309
- 238000003825 pressing Methods 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 11
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000014509 gene expression Effects 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 229920001342 Bakelite® Polymers 0.000 description 2
- 239000004637 bakelite Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 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
- 238000004090 dissolution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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- 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
- 230000001737 promoting effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
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- 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, and the control unit 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 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, an electric MOTOR (MOTOR) is configured to include a STATOR (STATOR) and a ROTOR (ROTOR), which are manufactured by stacking a plurality of STATOR cores and ROTOR cores (hereinafter, referred to as "MOTOR cores") respectively. Further, a motor core is produced 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, and then stacking them and pressing them with a press is used. In the pressing process by the press, embosses (embosses) protruding from the bottom surface of the core film and embossing locking grooves on the upper surface corresponding to the embosses are formed in the core film, and the plurality of core films are combined with the embosses and the embossing locking grooves of the adjacent core films. In other words, the plurality of core films are bonded in an interlocking manner.
In addition, not only the core film may be laminated by such a mechanical method, but also the core film may be laminated by a heating/cooling process after applying an accelerator to a Self-adhesive (Self-Bonding) adhesive surface of the core film. At this time, a curing accelerator is applied to the core film for more effective bonding. In addition, the films may be laminated through a heating/cooling process after coating an adhesive (Bond) cured by heating on the surface between the core films.
In addition, when the motor core is produced, the motor core is heated and then cooled in order to increase the fastening force between the core films, and when the motor core is cooled once at a low temperature, the fastening force between the core films is weakened. In addition, when the motor core is cooled at a low temperature, quality deterioration of the motor core such as a crack (crack) in the motor core may occur.
Therefore, there is a need for a technique that can improve the quality of the motor core while preventing a decrease in the fastening force between the core films when cooling the motor core.
Patent document
Patent document 1 Korean granted patent publication No. 10-1950993 (2019.02.22. publication)
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 fastening force between core films from being reduced when a motor core is cooled.
Another object of the present invention is to provide a motor core device that can improve the quality of a motor core by preventing cracks from being generated 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 module including an upper mold and a lower mold disposed to face the upper mold; a pressure module connected to the mold module and laminating a core film to generate a motor core; an accelerator spraying module for applying a curing accelerator to a surface of the core thin film; a molding module including a first coil module through which a first alternating current can flow, a heating device that causes an induced current based on the first alternating current to flow through the motor core to heat the motor core, and a lifter plate liftably provided to the lower mold so that the heated motor core moves downward in the lower mold; 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 heating the motor core by flowing an induced current based on the internal alternating current and the external alternating current through the motor core moved by the elevating plate; 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, and the control unit 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 second temperature range being lower than the first temperature range.
Further, the motor core manufacturing apparatus may further include a transfer device that transfers the motor core so that the motor core sequentially passes through the heating unit and the cooling unit, wherein the control unit may control the transfer device so that the motor core stays in the first cooling passage for the same time as the motor core stays in the second cooling passage, and may control the cooling unit so that a first gas is supplied to the first cooling passage and a second gas having a second cooling temperature, which is lower than the temperature of the first gas, is supplied to the second cooling passage.
In addition, there may be provided a motor core manufacturing apparatus, wherein the cooling unit includes: a blocking wall in which a communication port that communicates the first cooling passage and the second cooling passage is formed; and an opening/closing portion that selectively opens and closes the communication port, the control portion controlling the opening/closing portion such that the communication port is opened when the motor core is located within a predetermined distance from the opening/closing portion, and the communication port is blocked when the motor core is not located within the predetermined distance from the opening/closing portion.
Further, the motor core manufacturing apparatus may further include a transfer device that may transfer a motor core in one direction so that the inner circumferential surface and the outer circumferential surface of the motor core may be sequentially heated, the first coil may heat the motor core by causing an induced current based on the internal alternating current to flow through the motor core on an inner circumferential surface side of the motor core, the second coil may heat the motor core by causing an induced current based on the external alternating current to flow through the motor core on an outer circumferential surface side of the motor core, the control portion may control the heating unit so that, after the inner circumferential surface of the motor core is heated by the first coil, the outer circumferential surface of the motor core is heated by the second coil until a time point at which a temperature of the inner circumferential surface and a temperature of the outer circumferential surface are balanced, the transfer device is controlled to transfer the motor core, which has heated the inner peripheral surface 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 fastening force between the core films from being reduced.
In addition, the motor core is prevented from generating cracks when being cooled, so that the quality of the motor core is improved.
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 the rear end portion according to an embodiment of the present invention;
FIG. 3 is a top view of a motor core film according to one embodiment of the present 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 one embodiment of the invention;
fig. 6 is a plan 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: pressing the punch; 222: a pressure die;
230: forming a module; 231: a cooling device;
231 a: cooling the nozzle; 231 b: a squeezing ring;
232: a heating device; 232 a: a first coil module;
232 b: 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: an accelerator spray nozzle; 242: a quantitative discharge valve;
243: an accelerator tank; 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; 321 a: a first fastening hole;
322: a second plate; 322 a: 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; 333 a: a communication port;
334: an opening/closing section; 340: a transfer device;
341: a first transfer section; 342: a second transfer section;
350: control unit
Detailed Description
Hereinafter, specific embodiments for implementing 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 known configurations or functions related to the present invention may make the gist of the present invention unclear, a detailed description thereof will be omitted.
In addition, when one component is "connected," "supported," "contacted," or "coupled" to another component, it may be directly connected, supported, contacted, or coupled to the other component, but it is understood that other components may exist therebetween.
The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless the context clearly dictates otherwise, singular expressions include plural expressions.
In addition, terms including ordinal numbers such as first, second, etc., may be used to describe various constituent elements, but the corresponding constituent elements are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from another.
The meaning of "comprising" as used in the specification is to specify the presence of stated features, regions, integers, steps, acts, elements, and/or components, but does not preclude the presence or addition of other specified features, regions, integers, steps, acts, elements, components, and/or groups thereof.
In addition, in this specification, expressions such as upper, lower, and the like are descriptions with reference to the drawings in the drawings, and it should be noted in advance that they may have different expressions if the direction of an object is changed. On the other hand, in the present specification, 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, the 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 the motor core 100, so that the motor core 100 may 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. Such a material of the motor core 100 may be processed into a single core film 110 in sequence while passing through the motor core manufacturing apparatus 1. A curable resin or an adhesive or binder (bond) may be applied to the upper surface and/or the lower surface of the core film 11, and a plurality of core films 110 may be fabricated into the electric motor core 100 through a lamination and punching process. 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 a circulation current flowing at an outer diameter side and a circulation current flowing at an inner diameter side are different from each other. For example, the width of motor core 100 may be 20cm to 200 cm.
The front end 200 may process a single core film 110 and punch the single core film 110 to produce the motor core 100. Such a nose section 200 may include a mold module 210, a pressure module 220, a shaping module 230, and an accelerator injection module 240.
The pressure module 220 may generate the motor core 100 by laminating the core films 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. Additionally, the pressure module 220 may be coupled 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 molding the core film 110 may be provided, respectively, so that the plurality of press punches 221 and press dies 222 may be disposed to be spaced apart from each other on an operation path for moving the core film 11. Such a press machine 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 lifting plate 235. In addition, 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 may 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 core 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 a cooling device 232 may include a cooling nozzle 231a and an extrusion ring 231 b.
The cooling nozzle 231a may cool the outer circumferential surface of the motor core 100. Such a cooling nozzle 231a may be disposed at an upper side of the heating device 232, and may prevent the motor core 100 from being excessively heated by the heating device 232 in advance. The cooling nozzle 231a may be in the form of an air cooler.
The pressing ring 231b may prevent the motor core 100 from falling 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 that may be interposed in the groove formed on the inner circumferential surface of the pressing ring 231b may be formed on the outer circumferential surface of the motor core 100. In other words, the motor core 100 does not fall down due to contact with the inner circumferential surface of the pressing ring 231b, but can be pressed by another motor core 100 stacked on the upper portion of the motor core 100 to move downward. In addition, a predetermined frictional force may act between such a pressing ring 231b and the motor core 100, and due to such a frictional force, the motor core 100 may be prevented from arbitrarily falling freely 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 a 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 a heating device 232 may be disposed within the lower mold 212. In addition, the heating device 232 may include a first coil module 232a and a guide portion 232 b.
The first coil module 232a may be disposed at an 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 ℃. In addition, the first alternating current flowing through the first coil module 232a may have a frequency of 10Khz to 25 Khz.
The guide portion 232b may align the motor core 100 coated with the accelerator before the motor core 100 is heated by the first coil module 232 a. In other words, the guide portion 232b may be in surface contact with the outer circumferential 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 guiding 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 ceramic, teflon, bakelite (bakelite), or the like. The shape of the inner circumferential surface of such a guide portion 232b may correspond to the shape of the outer circumferential surface of the motor core 100 to prevent the motor core 100 from falling. For example, a groove may be formed on the inner circumferential surface of the guide portion 232b, and a protrusion that may be inserted into the groove formed on the inner circumferential surface of the guide portion 232b may be formed on the outer circumferential surface of the motor core 100. In other words, the motor core 100 does not fall down by contact with the inner circumferential surface of the guide portion 232b, but can be moved downward by being pressed by another motor core 100 stacked on the upper portion of the motor core 100. In addition, the motor core 100, which is separated from the guide 232b, may fall and may be supported on the upper surface of the lifting plate 235. In addition, a predetermined frictional force may act between such a guide portion 232b and the motor core 100, and due to such a frictional force, the motor core 100 may be prevented from arbitrarily free-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 the bottom dead center. An upper surface of such a lifting plate 235 may support the motor core 100, and another actuator (not shown) for raising or lowering the lifting plate 235 may be drivingly connected to a lower surface of the lifting plate 235. For example, the actuators may be provided as hydraulic cylinders. In addition, the lifting 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 by another means.
The actuator 236 may eject the motor core 100 outside of the lower mold 212. In other words, the actuator 236 may push the motor core 100 moved from the lifting plate 235 to the bottom dead center, thereby being discharged to the outside of the lower mold 212.
The accelerator spraying module 240 may apply a curing accelerator to the surface of the core thin film 110. Such accelerator injection module 240 may include an accelerator injection nozzle 241, a metered discharge valve 242, and an accelerator tank 243.
The accelerator tank 243 may supply accelerator to the metering discharge valve 242 under pressure. The rate of accelerator injection from such accelerator tank 243 to metered discharge valve 242 may vary depending on the viscosity of the accelerator.
The rear end 300 aligns the motor core 100 generated from the front end 200 and then heats the motor core 100 in a high frequency manner, whereby the fastening force of the motor core 100 can be improved. Such a back end 300 may be a subsequent process to 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.
Referring further to fig. 2, the heating unit 310 may heat the motor core 100 by flowing an induction 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 by the second coil 312. The heating unit 310 may heat the motor core 100 by the first coil 311 and the second coil 312 for a time of 120 seconds to 180 seconds.
The first coil 311 may heat the motor core 100 by flowing an induction current based on an internal alternating current through an inner circumferential 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 an internal alternating current flows through the first coil 311, a magnetic field is generated, and an induced current may 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 an induced current flowing through the inner circumferential side of the motor core 100 larger than an induced current flowing through the outer circumferential 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 may heat the motor core 100 by flowing an induction current based on an external alternating current through an outer circumferential 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 coils 312, a magnetic field is generated, and an induced current may be generated in the motor core 100 by the magnetic field generated by the second coils 312. In addition, the second coil 312 may make an induced current flowing through the outer circumferential surface side of the motor core 100 larger than an induced current flowing through the inner circumferential surface side of the motor core 100. The second coil 312 may heat the motor core 100 until a time point 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 an equilibrium. For example, the temperature of motor core 100 when the temperature of the inner circumferential surface and the temperature of the outer circumferential surface of motor core 100 reach equilibrium may be 200 ℃ to 220 ℃. At least one of the internal ac current flowing through the first coil 311 and the external ac 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 and second coils 311 and 312. The temperature of the motor core 100 measured by such an infrared temperature sensor may be transmitted to the control part 350.
Referring further to fig. 3 to 4, the core support module 320 may align and support the motor core 100 during the motor core 100 is heated by the heating unit 310. In other words, the motor core 100 may maintain a fastening connection during the interval transfer of the heating unit 310 through the core support module 320. Such a core supporting 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. The central portion of such a first plate 321 may be opened. In addition, the first fastening holes 321a may be formed at the edge of the first plate 321 in the circumferential direction of the first plate 321. Such a first fastening hole 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 central 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 in the circumferential direction of the second plate 322. The number of such second fastening holes 322a may correspond to the number of the first fastening holes 321 a.
The inner diameter guide 323 may contact and support an 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 an inner circumferential surface of the motor core 100 and may support an inner side of the motor core 100. Such an inner diameter guide 323 may be removed from the inside 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.
The fastening part 324 may connect the first plate 321 and the second plate 322 so that the core support module 320 may fix and support the motor core 100. Such a fastening portion 324 may include a fastener 324a and a fastening guide pin 324 b.
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 in the shape of a nut. The number of the fastening members 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 and second fastening holes 321a and 322 a. For example, a thread may be formed at one side of the fastening guide pin 324b inserted into the first plate 321 such that it can be connected to the fastening member 324 a. In addition, the number of the fastening guide pins 324b may correspond to the number of the first fastening holes 321 a.
When the fastening guide pin 324b is inserted into the first fastening hole 321a, the bushing 325 may prevent shaking of the fastening guide pin 324 b. Such a bushing 325 may be inserted into the first fastening hole 321 a. In addition, the number of the bushings may correspond to the number of the first fastening holes 321 a.
Referring to fig. 6, the cooling unit 330 may cool the motor core 100 transferred after passing through the heating unit 310. Such a cooling unit 330 may slowly cool the motor core 100 to a predetermined temperature and then rapidly cool it. In this specification, the slow cooling motor core 100 does not mean that the motor core 100 is cooled slowly for a long time, but the motor core 100 is cooled to a temperature higher than the temperature in the fast cooling zone. The term "rapidly cooling the motor core 100" does not mean rapidly cooling the motor core 100 in a short time, but cooling the motor core 100 to a temperature lower than the temperature in the slow cooling section. The cooling unit 330 may cool the motor core 100 at different temperatures in the slow cooling motor core 100 section and the rapid cooling motor core 100 section. For example, the cooling unit 330 may be a unit capable of cooling the substance of the motor core 100, such as an air cooler or a cooling nozzle. A first cooling passage 331 and a second cooling passage 332 may be formed in such a cooling unit 330.
The first cooling path 331 may provide a path through which the motor core 100 moves. During passing through such a first cooling path 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, the first gas having the 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 ℃. Here, the meaning of providing the first gas having the first cooling temperature not only refers to supplying the first gas having the first cooling temperature to the first cooling path 331 but also includes a concept of adjusting the temperature of the gas staying in the first cooling path 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 the passage through such a second cooling passage 332, the motor core 100 may be cooled to a preset second temperature range. Such 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 ℃. Herein, the meaning of providing the second gas having the second cooling temperature not only refers to supplying 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 adhesive force 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 by one pass at a sub-zero temperature, the core films 110 may be separated since the adhesive force between the core films 110 cannot be maintained. In addition, the quality of the motor core 100 may be degraded such as generation of cracks in the motor core 100. However, if the motor core 100 is cooled secondarily after being primarily cooled in a temperature range of normal temperature, there is an effect that the adhesive force between the core films 110 is maintained and cracks (cracks) may be prevented from being generated in the motor core 100.
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 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 and closes the communication port 333 a. That is, the opening/closing portion 333a selectively communicates the first cooling passage 331 and the second cooling passage 332 by opening/closing the communication port 333 a. For example, the opening/closing portion 334 blocks the communication port 333a while the motor core 100 passes through the first cooling passage 331. Further, when motor core 100 reaches a distance adjacent to opening/closing portion 334 after being cooled to the first temperature range in first cooling passage 331, opening/closing portion 334 opens communication port 333 a. As a more detailed example, when the plurality of motor cores 100 pass through the first cooling passage 331, the opening and closing part 334 may open and close the communication port 333a corresponding to the interval between the plurality of motor cores 100. The operation of the opening/closing unit 334 can be controlled by the control unit 350.
On the other hand, the opening/closing unit 333a may be provided with 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 unit 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). The transfer device 340 may include a first transfer portion 341 and a second transfer portion 342.
The first transfer portion 341 may transfer the motor core 100 in one direction so that the motor core 100 discharged from the lower mold 212 passes through the heating unit 310. For example, the motor core 100 moving along the first transfer portion 341 may be heated while sequentially passing through the first coil 311 and the second coil 312. 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 transferring the movement 100 within the section of the heating unit 310 by the first transfer portion 341 may be 2 to 5 minutes. The first transfer unit 341 may transfer the heated motor core 100 to the second transfer unit 342.
The second transfer part 342 may transfer the motor core 100 such that the motor core 100 heated in the heating unit 310 passes through the cooling unit 330. For example, the motor core 100 moving along the second transfer portion 342 may be cooled while sequentially passing through the first cooling passage 331 and the second cooling passage 332. Therefore, the motor core 100 moving along the second transfer portion 342 can be gradually cooled to the first temperature range and then rapidly cooled to the second temperature range. The time for transferring the motor core 100 in the first cooling path 331 and the second cooling path 332 by the second transfer portion 342 may be 50 minutes to 70 minutes, respectively. 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 and second coils 311 and 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 be generated between the inner circumferential surface and the outer circumferential surface of the motor core 100. In this case, the control part 350 may stop heating at a time point when the temperature of the outer surface of the motor core 100 and the temperature of the inner circumferential surface 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 ray 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 is different 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 a 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. The control unit 350 may control the operation of the opening/closing unit 333a so that the opening/closing unit 334 selectively opens and closes the communication port 333 a. For example, when the motor core 100 is detected by the distance detection sensor, the control portion 350 may control the opening and closing portion 333a such that the opening and closing portion 333a opens the communication port 333 a.
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 moving speed of the motor core 100 may be controlled while the motor core 100 passes through the heating unit 310 and the cooling unit 330. On the other hand, the control part 350 may be implemented by an arithmetic device including a microprocessor, a measuring device such as a sensor, and a memory, and its implementation method is obvious to those skilled in the art, and thus further detailed description thereof will be omitted.
Hereinafter, the operation and effect of the motor core manufacturing apparatus 1 having the above-described configuration will be described.
A user can use the motor core manufacturing apparatus 1 to manufacture the motor core 100. A core material, which is a material of the motor core 100, may be input into the motor core manufacturing apparatus. Such a 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 accelerant spraying module 240 may dissolve the applied adhesive by spraying the accelerant onto the core film 110. A portion of the adhesive may be formed into the motor core 100 through a lamination and punching process in the lower mold 212 by promoting dissolution of the core film 110. After the outer circumferential surface of such a motor core 100 is cooled through the cooling nozzle 231a, the outer circumferential surface may be heated through the heating device 232. The heated motor core 100 may be transferred to a bottom dead center by the lifting 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 core 100. The entire row of motor cores 100 may be transferred to the heating unit 310 by the transfer device 340. The inside of the transferred motor core 100 is heated by the internal ac current flowing through the first coil 311, and then the outside 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 path 331. Thereafter, when the motor core 100 is moved to a position adjacent to the opening and closing portion 333a, the opening and closing portion 333a may open the communication port 333 a. In addition, the motor core 100 may be cooled to the second temperature range while passing through the second cooling passage 332, thereby being 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 it is possible to maintain the adhesive force between the core films 110 and prevent the generation of cracks (cracks) in the motor core 100.
The motor core manufacturing apparatus 1 can heat the motor core by the induced current flowing through the first coil module 232a, the first coil 311, and the second coil 312, and can shorten the heating process time compared to the conventional hot air method. In addition, the motor cores 100 having high fastening force may be manufactured by coating the promoter between the core thin films 110 in the process of the front end portion 200 and then laminating the same, and the plurality of motor cores 100 supported by the core support module 320 may be heated in the process of the rear end portion 300, thereby having an effect of improving the 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, and the present invention is not limited thereto, and should be construed as having the broadest scope in accordance with the basic idea disclosed in the present specification. One skilled in the art may combine/replace the disclosed embodiments to implement a pattern of shapes not indicated without departing from the scope of the invention. In addition, the disclosed embodiments may be easily changed or modified by those skilled in the art based on the present description, and it should be clear that such changes or modifications also belong to the protection scope of the present invention.
Claims (4)
1. A motor core manufacturing device is characterized in that,
the method comprises the following steps:
a mold module including an upper mold and a lower mold disposed to face the upper mold;
a pressure module connected to the mold module and laminating a core film to generate a motor core;
an accelerator spraying module for applying a curing accelerator to a surface of the core thin film;
a molding module including a first coil module through which a first alternating current can flow, a heating device that causes an induced current based on the first alternating current to flow through the motor core to heat the motor core, and a lifter plate liftably provided to the lower mold so that the heated motor core moves downward in the lower mold;
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 heating the motor core by flowing an induced current based on the internal alternating current and the external alternating current through the motor core moved by the elevating plate;
a cooling unit cooling the motor core heated by the heating unit to a predetermined temperature; and
a control unit for controlling the operation of the heating unit and 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 passing through the first cooling passage, the motor core is cooled to a preset second temperature range during passing through 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,
further comprising a transfer device for transferring the motor core so that the motor core passes through the cooling unit,
the control unit controls the transfer device such that the motor core stays in the first cooling passage for the same time as the motor core stays in the second cooling passage,
and controlling the cooling unit to supply a first gas to the first cooling passage and to supply 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,
the cooling unit includes:
a blocking wall in which a communication port that communicates the first cooling passage and the second cooling passage is formed; and
an opening/closing portion that selectively opens and closes the communication port,
the control unit controls the opening/closing unit such that the communication port is opened when the motor core is located within a predetermined distance from the opening/closing unit, and the communication port is blocked when the motor core is not located within the predetermined distance from the opening/closing unit.
4. The motor core manufacturing apparatus according to claim 1,
further comprising a transfer device capable of transferring the motor core in one direction so that the inner circumferential surface and the outer circumferential surface of the motor core can be sequentially heated,
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 an inner circumferential surface side of the motor core,
the second coil heats the motor core by causing an induction current based on the external alternating current to flow through the motor core on an outer peripheral surface side of the motor core,
the control portion controls the heating unit such that, after an inner peripheral surface of the motor core is heated by the first coil, an outer peripheral surface of the motor core is heated by the second coil until a point in time at which a temperature of the inner peripheral surface and a temperature of the outer peripheral surface are brought into equilibrium,
the transfer device is controlled to transfer the motor core, which has heated the inner peripheral surface by the first coil, to the second coil.
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| CN114629308B (en) | 2024-04-26 |
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