KR20220160883A - Manufacturing apparatus for motor core - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing motor cores, which injects resin into a magnet insertion hole to fix a magnet inserted into a magnet insertion hole of a laminated core. According to the present invention, the apparatus for manufacturing motor cores comprises: a central base disposed between an upper mold and a lower mold; a movable plate allowing a laminated core, into which magnets are inserted into a plurality of magnet insertion holes, to be arranged therein, mounted on the central base, and having a communication hole communicating with the magnet insertion holes formed therein; and a resin supply unit injecting resin into the magnet insertion hole through the communication hole while the laminated core is pressed by the upper mold and the lower mold. With this configuration, a magnet inserted into a magnet insertion hole of a laminated core can be fixed without gaps by injecting resin into the magnet insertion hole, thereby providing an effect of preventing vibration and noise.

Description

Motor core manufacturing device {MANUFACTURING APPARATUS FOR MOTOR CORE}

The present invention relates to an apparatus for manufacturing a motor core, and more particularly, to a manufacturing apparatus for a motor core in which resin is injected into a magnet insertion hole to fix a magnet inserted into the magnet insertion hole of a laminated core.

A motor is a mechanical device that obtains rotational force from electrical energy, and includes a stator and a rotor. The rotor electromagnetically interacts with the stator and rotates with a force acting on a magnetic field and a current flowing through the coil.

The stator refers to a stationary part of a rotating machine such as a motor, that is, a fixed part that does not rotate. For example, in the case of an induction machine, the stator is composed of a stator core and stator windings.

The rotor includes a rotor core constituting a rotating body and a magnet fixed to a slot of the rotor core. A plurality of slots into which the magnets are inserted are formed in the rotor core.

A typical rotor for a motor includes a plurality of magnets disposed in a circumferential direction around a rotation axis, a rotor core supporting the magnets and forming a passage for magnetic flux, and an injection molding member that covers the magnets and fixes them to the rotor core. includes

Conventionally, BMC (Bulk Molding Compound) was injected to fix the magnet to the slot.

That is, in the case of BMC injection molding, a molding member for fixing a magnet may be integrated into the rotor core by inserting the rotor core with the magnets temporarily assembled into a mold and then injection-molding the rotor core with a plastic material.

However, in the case of the method of fixing the magnet to the rotor core by the above-described insert injection method, molds are required for each product, and in particular, the rotor core is deformed due to the high temperature and high pressure accompanying the insert injection process.

Korean Patent Publication No. 2015-0009891 (2015.01.27)

The present invention was invented to solve the above problems, and the purpose of the present invention is to provide a motor core manufacturing apparatus capable of fixing a magnet inserted into a magnet insertion hole of a laminated core by injecting resin into a magnet insertion hole. there is

Further, according to the present invention, an object of the present invention is to provide a motor core manufacturing apparatus capable of pressurizing the laminated core with the same pressure as a whole by controlling the pressurizing part of the laminated core differently for each region.

In order to achieve the above object, an apparatus for manufacturing a motor core according to a preferred embodiment of the present invention includes a base frame; an upper mold provided on the base frame; a lower mold provided on the base frame to face the upper mold; a center base disposed between the upper mold and the lower mold, and having an upper surface selectively contacting the upper mold and a lower surface selectively contacting the lower mold; a movable plate on which laminated cores into which magnets are inserted are disposed in a plurality of magnet insertion holes, seated on the central base, and communication holes communicating with the magnet insertion holes; and a resin supply unit provided in the lower mold and injecting resin into the magnet insertion hole through the communication hole in a state in which the laminated core is pressed by the upper mold and the lower mold.

And, a core pressing unit provided in the upper mold and pressing the upper side of the laminated core; may be further included.

More specifically, the core pressing unit may include a pressing plate contacting an upper surface of the laminated core; and a pressure actuator provided in the upper mold and pressing the laminated core by moving the pressure plate.

Here, the pressure actuator may be provided in plural and operate at least the same or differently to press the pressure plate.

In addition, the core pressing part may further include a pressing part elastic member disposed between the upper mold and the pressing actuator and applying an elastic force so that the pressing actuator returns to its original position.

Further, in the motor core manufacturing apparatus according to an embodiment of the present invention, at least one of the upper mold and the lower mold may be moved in a vertical direction to contact the central base.

In addition, the center base may move in a vertical direction between the upper mold and the lower mold, and contact with at least one of the upper mold and the lower mold and then contact with the other one.

Furthermore, after resin is injected into the magnet insertion hole, residual resin may remain on the resin supply unit when the lower mold and the central base are separated.

According to the motor core manufacturing apparatus according to the present invention, by injecting resin into the magnet insertion hole, the magnet inserted into the magnet insertion hole of the laminated core can be fixed without empty space, thereby obtaining an effect of preventing vibration and noise. have.

In addition, according to the present invention, the pressurizing part of the laminated core can be differently controlled for each region so that the laminated core can be pressed with the same pressure as a whole, so that even if there is a deviation in the pressing surface of the laminated core, damage to the laminated core due to pressurization can be prevented. effect can be obtained.

1 is a diagram schematically showing an apparatus for manufacturing a motor core according to an embodiment of the present invention;
2 is a view schematically showing a main part extracted from a motor core manufacturing apparatus according to an embodiment of the present invention;
3 is a view schematically showing a state in which a movable plate is disposed on a central base in a motor core manufacturing apparatus according to an embodiment of the present invention;
4 is a view schematically showing a state in which a lower mold is in contact with a central base in a motor core manufacturing apparatus according to an embodiment of the present invention;
5 is a view schematically showing a state in which a central base is pressed by an upper mold and a lower mold in a motor core manufacturing apparatus according to an embodiment of the present invention;
6 is a view schematically showing a state in which a resin supply unit operates to inject resin into a magnet insertion hole in the motor core manufacturing apparatus according to an embodiment of the present invention;
7 is a view schematically showing a state in which an upper mold and a lower mold are separated from a central base after resin is supplied in a motor core manufacturing apparatus according to an embodiment of the present invention;
8 is a view schematically showing a core pressing part extracted from a motor core manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be construed as including all changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, interpreted in an ideal or excessively formal meaning. It may not be.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagram schematically showing an apparatus for manufacturing a motor core according to an embodiment of the present invention, and FIG. 2 is a diagram schematically illustrating a main part of the motor core manufacturing apparatus.

Further, FIGS. 3 to 7 are views sequentially showing an operation state in which a magnet is fixed by injecting resin into a magnet insertion hole of a laminated core by the motor core manufacturing apparatus. More specifically, FIG. 3 shows a state in which the movable plate is disposed on the center base in the motor core manufacturing apparatus, FIG. 4 shows a state in which the lower mold is in contact with the center base, and FIG. 5 shows a state in which the center base is in contact with the upper mold 6 is a state in which the resin supply unit operates to inject resin into the magnet insertion hole, and FIG. 7 schematically shows a state in which the upper and lower molds are separated from the central base after supplying the resin. It is a drawing that has been shown.

And, FIG. 8 is a view schematically showing a core pressing part extracted from the motor core manufacturing apparatus.

1 to 8, a motor core manufacturing apparatus 100 according to an embodiment of the present invention includes a base frame 110, an upper mold 200 provided on the base frame 110, and the upper A lower mold 400 provided on the base frame 110 facing the mold 200, a central base 300 disposed between the upper mold 200 and the lower mold 400, and a laminated core ( 10) may be formed by including a movable plate 120 disposed and seated on the central base 300, and a resin supply unit 410 for injecting resin into the magnet insertion hole 11 of the laminated core 10. .

The base frame 110 constitutes an outer shape of the motor core manufacturing apparatus 100 . For example, the base frame 110 is provided as a press equipment, and may be provided to move at least one of the upper mold 200 and the lower mold 400 in a vertical direction.

The upper mold 200 is provided on the upper side of the base frame 110 . And, the upper mold 200 is provided to press the upper surface of the laminated core 10 while injecting resin into the magnet insertion hole 11 of the laminated core 10 .

The lower mold 400 is provided on the base frame 110 to face the upper mold 200 . And, the lower mold 400 moves so that the upper surface of the laminated core 10 is pressed by the upper mold 200 while injecting resin into the magnet insertion hole 11 of the laminated core 10. It is provided to press the plate 120.

That is, the upper mold 200 and the lower mold 400 inject resin into the magnet insertion hole 11 while pressing the laminated core 10 disposed on the moving plate 120 from both sides. can be provided.

The center base 300 is disposed between the upper mold 200 and the lower mold 400 and is movable in the vertical direction.

For example, the center base 300 is disposed between the upper mold 200 and the lower mold 400 and includes a base plate 310 on which the moving plate 120 is seated, and one end of the base plate ( 310) is fastened along the circumference and the other side is inserted into the upper mold 200 and may include a plurality of guide parts 320 that slide.

With this configuration, when the upper mold 200 moves downward or the lower mold 400 moves upward while the lower surface of the base plate 310 is in contact with the lower mold 400, the As the guide part 320 is inserted into the upper mold 200 , the upper side surface of the base plate 310 may move in contact with the upper mold 200 .

That is, the center base 300 may be configured such that the upper side selectively contacts the upper mold 200 and the lower side selectively contacts the lower mold 400 . At this time, the laminated core 10 disposed on the moving plate 120 may be pressed by the upper mold 200 and the lower mold 400 .

The base plate 310 has a through hole 311 through which the center passes, and the resin supply part 410 may be inserted thereinto. That is, the lower surface of the movable plate 120 is exposed through the through hole 311, and the resin supply unit 410 inserted into the through hole 311 adheres to the lower surface of the movable plate 120. It can be. Through this, the resin supplied from the resin supply unit 410 may pass through the communication hole 123 of the moving plate 120 and be supplied to the magnet insertion hole 11 of the laminated core 10 .

And, the base plate 310 may be provided with a clamp 330 for position fixing the movable plate 120 .

The clamp 330 may fix the movable plate 120 seated on the base plate 310 so as to be located at the upper center of the through hole 311 . At this time, the fastening position of the moving plate 120 may also be set by the clamp 330 so that the communication hole 123 of the moving plate 120 is positioned above the resin supply unit 410 .

In the moving plate 120, the laminated core 10 into which the magnets 20 are inserted are disposed in a plurality of magnet insertion holes 11, seated on the central base 300, and the magnet insertion holes 11 and A communication hole 123 may be formed.

For example, the movable plate 120 includes a plate part 121 on which the laminated core 10 is seated, and a through hole protruding from the center of the plate part 121 and passing through the center of the laminated core 10. It may include a protrusion 122 inserted into.

In addition, a communication hole 123 may be formed in the plate part 121 so that the resin supplied from the resin supply part 410 flows.

Here, the communication hole 123 may be formed at a position corresponding to each position of the plurality of magnet insertion holes 11 formed in the laminated core 10 . That is, the resin injected through one communication hole 123 may be supplied to one magnet insertion hole 11 .

The communication hole 123 may be formed in a shape in which the diameter decreases in the thickness direction. That is, a portion having a large diameter in the communication hole 123 may be connected to the resin supply unit 410, and a portion having a small diameter in the communication hole 123 may be connected to the magnet insertion hole 11. .

In addition, a guide protrusion (not shown) is formed in one of the through holes of the protrusion 122 and the laminated core 10, and a slit (not shown) is formed in the other, and the laminated core is inserted into the protrusion 122. The position of (10) can be set in advance.

That is, when the laminated core 10 is disposed on the movable plate 120, the magnet insertion hole 11 formed in the laminated core 10 is formed on the communication hole 123 formed in the movable plate 120. should be located

Therefore, guide protrusions and slits are formed in the through holes of the protrusions 122 and the laminated core 10 so that the magnet insertion holes 11 are positioned on the communication holes 123 so that the laminated core 10 is formed as described above. It can be placed on the moving plate 120.

The resin supply unit 410 is provided in the lower mold 400, and the communication hole 123 is formed in a state in which the laminated core 10 is pressed by the upper mold 200 and the lower mold 400. Through this, resin may be injected into the magnet insertion hole 11 .

For example, the resin supply unit 410 is disposed movably in the resin supply port 411 in which the resin is disposed, and pressurized the melted resin in the resin supply port 411 to the magnet insertion hole 11. It may include a resin supply piston 412 for injecting, and a resin supply actuator 413 for moving the resin supply piston 412 in a vertical direction.

Here, as an example, EMC (Epoxy Molding Compound) may be used as the resin, and EMC in the form of a block may be inserted into the resin supply port 411, heated and melted, and then injected.

With this configuration, a block-shaped resin (BS) is inserted into the resin supply port 411, and the upper mold 200 and the lower mold 400 are brought into contact with each other on both sides of the central base 300 so that the stacking is performed. After pressurizing the core 10 and heating the resin supply port 411 to melt the resin, the resin supply actuator 413 moves the resin supply piston 412 to transfer the melted resin to the magnet insertion hole ( 11) can be injected.

At least one resin supply unit 410 may be provided to correspond to the communication hole 123 of the moving plate 120 . For example, a plurality of resin supply units 410 may be provided, and one resin supply unit 410 may supply resin to at least one or two communication holes 123 .

Hereinafter, an operation of fixing the magnet 20 by injecting resin into the magnet insertion hole 11 of the laminated core 10 by the motor core manufacturing apparatus 100 according to an embodiment of the present invention will be described in order. .

First, the laminated core 10 is placed on the moving plate 120, and the magnet 20 is inserted into the magnet insertion hole 11 of the laminated core 10. At this time, the magnet insertion hole 11 is located on the communication hole 123 of the moving plate 120 .

Then, after preheating together in a state where the laminated core 10 into which the magnet 20 is inserted is placed on the movable plate 120, as shown in FIG. 3, the movable plate 120 on which the laminated core is placed is seated on the central base 300.

In addition, at least one of the upper mold 200 and the lower mold 400 is moved to come into close contact with both sides of the central base 300 to press the laminated core 10 .

For example, as shown in FIG. 4 , the lower mold 400 moves upward to contact the lower surface of the central base 300, and the resin supply unit 410 moves to the lower surface of the moving plate 120. is placed on

At this time, the first guide protrusion 401 formed on the lower mold 400 is formed on the central base 300 so that the coupled position between the lower mold 400 and the central base 300 can be accurately positioned. 1 may be configured to be inserted into the guide groove 312.

In addition, the second guide protrusion 402 formed on the lower mold 400 is formed on the moving plate ( 120) may be configured to be inserted into the second guide groove 124 formed.

Then, the upper mold 200 or the lower mold 400 is further moved, and as shown in FIG. 5 , the upper mold 200 contacts the upper surface of the center base 300 .

At this time, the third guide protrusion 403 formed on the lower mold 400 is formed on the upper mold 200 so that the coupled position between the upper mold 200 and the central base 300 can be accurately positioned. 3 may be configured to be inserted into the guide groove 201.

In this case, the resin supply unit 410 adheres to the lower surface of the moving plate 120 and communicates with the communication hole 123, and the core pressing unit 210 described below is installed on the laminated core 10. It adheres to the side surface and presses the laminated core 10 with a certain pressure.

And, as shown in FIG. 6 , the resin supply unit 410 is operated to inject molten resin into the magnet insertion hole 11 through the communication hole 123 .

Then, after the resin injection is completed and the time for the resin to harden has elapsed, as shown in FIG. 7 , the upper mold 200 and the lower mold 400 are spaced apart from the central base 300 .

At this time, the residual resin RS remaining after being supplied to the magnet insertion hole 11 remains on the resin supply unit 410 . That is, in the process of separating the lower mold 400 and the central base 300, the remaining resin RS does not remain on the moving plate 120 side, but remains on the resin supply unit 410. .

In addition, if the laminated core 10 is separated from the moving plate 120, the laminated core 10 in a state where the magnet is fixed to the magnet insertion hole 11 can be manufactured without a separate residual resin removal operation.

The motor core manufacturing apparatus 100 according to an embodiment of the present invention may further include a core pressing unit 210 provided in the upper mold 200 and pressing the upper side of the laminated core 10. have.

That is, in a state in which the lower side surface of the center base 300 is supported by contacting the lower mold 400 and the upper side surface is supported by contacting the upper mold 200, the core pressing part 210 is the laminated layer. It is made in close contact with the upper surface of the core 10 to press the laminated core 10 .

For example, the core pressing unit 210 is provided in the upper mold 200 and the pressing plate 211 in contact with the upper side of the laminated core 10 and moves the pressing plate 211 to form the laminated core. It may include a pressure actuator 212 that presses the core 10 .

Here, the pressure actuator 212 is provided in plurality, and may operate at least the same or differently to press the pressure plate 211 .

Since the laminated core 10 is manufactured by stacking a plurality of plate materials, height deviation of the laminated core 10 may occur due to a manufacturing process or a thickness deviation of the plate materials. That is, an upper surface to which the core pressing part 210 contacts may be inclined.

In this case, when the core pressing part 210 is pressed with a constant force in the vertical direction, the high part of the inclined upper side of the laminated core 10 preferentially comes into contact with the core pressing part 210 and is pressed. , a different pressing force acts on the laminated core 10 as a whole.

That is, there is a problem in that the high portion of the inclined upper side of the laminated core 10 may be preferentially pressed and pressed with a relatively large pressing force, causing the laminated core 10 to be damaged. In addition, since a relatively small pressing force is applied to a low portion of the inclined upper side of the laminated core 10, a non-uniform pressing force is applied to the laminated core 10 as a whole.

Therefore, in order to solve this problem, the motor core manufacturing apparatus 100 according to an embodiment of the present invention includes a plurality of pressing actuators 212, and presses the pressing plate 211 with at least the same or different pressing forces. can do.

For example, the pressurizing actuators 212 are provided in four pieces and are radially spaced apart from the center of the laminated core 10 at regular intervals so that the upper surface of the laminated core 10 operates differently at four points to achieve the It may be made to press the pressure plate 211 .

With this configuration, four pressure actuators 212 are provided, and when the laminated core 10 is formed inclined, the four pressure actuators 212 move with the same displacement, the pressure plate 211 Partially pressurizes the laminated core 10.

Accordingly, each of the pressure actuators 212 is provided to enable pressure control, so that each of the pressure actuators 212 presses the pressure plate 211 with the same pressure. Through this, the pressure plate 211 can be controlled to press the laminated core 10 with the same pressure as a whole.

In addition, the core pressing part 210 is disposed between the upper mold 200 and the pressing actuator 212, and the pressing part elastic member 213 for applying an elastic force so that the pressing actuator 212 returns to its original position ) may further include.

For example, when the pressure actuator 212 is configured to provide only a pressure, the pressure actuator 212 removes the pressure, the elastic member 213 returns the pressure actuator 212 to its original position. can be authorized.

Of course, the pressure actuator 212 may be configured to move in both directions of applying and removing the pressure. In this case, the elastic member 213 of the pressing part may provide an additional return force when the pressing actuator 212 returns to its original position by removing the pressing force.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and the present invention is within the technical spirit of the present invention. It is clear that modification or improvement is possible by the person.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

10: laminated core 20: magnet
100: motor core manufacturing device 110: base frame
120: moving plate 121: plate portion
122: protrusion 123: communication hole
200: upper mold 210: core pressing part
211: pressure plate 212: pressure actuator
213: pressing part elastic member 300: center base
310: base plate 320: guide part
330: clamp 400: lower mold
410: resin supply unit 411: resin supply port
412: resin supply piston 413: resin supply actuator

Claims (8)

base frame;
an upper mold provided on the base frame;
a lower mold provided on the base frame to face the upper mold;
a center base disposed between the upper mold and the lower mold, the upper side of which is selectively in contact with the upper mold, and the lower side of which is selectively in contact with the lower mold;
a movable plate on which laminated cores into which magnets are inserted are disposed in a plurality of magnet insertion holes, seated on the central base, and communication holes communicating with the magnet insertion holes; and
a resin supply unit provided in the lower mold and injecting resin into the magnet insertion hole through the communication hole in a state in which the laminated core is pressed by the upper mold and the lower mold;
Motor core manufacturing apparatus comprising a.
According to claim 1,
a core pressing unit provided in the upper mold and pressing an upper surface of the laminated core;
Motor core manufacturing apparatus further comprising a.
According to claim 2,
The core pressing part,
a pressure plate contacting the upper side of the laminated core; and
a pressure actuator provided in the upper mold and pressing the laminated core by moving the pressure plate;
Motor core manufacturing apparatus comprising a.
According to claim 3,
The pressure actuator,
An apparatus for manufacturing a motor core, characterized in that it is provided in plurality and can operate at least the same or differently to press the pressure plate.
According to claim 3,
The core pressing part,
a pressing portion elastic member disposed between the upper mold and the pressing actuator and applying an elastic force to return the pressing actuator to an original position;
Motor core manufacturing apparatus further comprising a.
According to claim 1,
At least one of the upper mold and the lower mold moves in a vertical direction and contacts the central base.
According to claim 1,
The central base,
Motor core manufacturing apparatus, characterized in that it moves in the vertical direction between the upper mold and the lower mold, and contacts at least one of the upper mold and the lower mold and then contacts the other one.
According to claim 1,
After injecting resin into the magnet insertion hole, when the lower mold and the center base are separated, residual resin remains on the resin supply unit.

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