JP7267139B2 - Permanent magnet motor manufacturing equipment - Google Patents

Description

The present application relates to a permanent magnet motor manufacturing apparatus .

Conventionally, in this type of technology, an irreversibly thermally expandable adhesive is first placed between the seating surface of the rotor core and the inner peripheral surface of the magnetized permanent magnet. Here, as for the seating surface, magnet attachment grooves are provided between a plurality of salient poles formed on the outer periphery of the rotor core, and the bottom surface of the magnet attachment groove serves as the seating surface. The adhesive is applied in advance to either the inner peripheral surface of the permanent magnet or the seating surface of the magnet attachment groove, and the permanent magnet is inserted into the magnet attachment groove. done. After that, the permanent magnets are fixed to the rotor core by natural curing of the adhesive or by heating the adhesive to accelerate the curing of the adhesive and shorten the fixing time.

If the thickness of the adhesive layer formed between the permanent magnet and the rotor core is uneven, the motor output will fluctuate. In addition, the adhesion strength is lowered, and the permanent magnet may be peeled off due to centrifugal force due to high-speed rotation. Therefore, it is necessary to check whether the thickness of the adhesive layer spreads uniformly over the entire bottom surface of the permanent magnet. As a method for confirming that an appropriate amount of adhesive has been applied, there have been the following methods.
That is, in a permanent magnet motor, grooves corresponding to the shape of the permanent magnets are formed in the electromagnetic steel plate forming the rotor core, the permanent magnets are pushed into the grooves, and the two bottom surfaces are adhered with an adhesive applied between them. At that time, an adhesive reservoir recess is formed in the upper end of the side wall of the groove into which the adhesive flowing out from between the two bottom surfaces through the gap between the side wall of the groove and the side wall of the permanent magnet is introduced. By visually checking the amount of adhesive stored in the recess, there is a device that allows the user to check the applied state of the adhesive (see Patent Document 1).

JP 2012-125076 A

In Patent Document 1, by providing the adhesive storage recess in the rotor core, the adhesive overflowing from the side wall of the magnet attaching groove and accumulated in the adhesive storage recess can be visually recognized. However, since it is necessary to process the adhesive reservoir recess each time a rotor core is produced, there is a problem that the number of processing steps increases.

The present application discloses a technique for solving the above-described problems. The object is to provide a function to easily and reliably confirm that the container is filled. Another object of the present invention is to provide a function for attaching magnetized permanent magnets with high accuracy to grooves formed in the rotor core for attachment of magnets.

The apparatus for manufacturing a permanent magnet motor disclosed in the present application includes a stator provided with stator windings, a rotor core coaxially disposed inside the stator, and magnets attached to magnet attachment grooves provided in the rotor core with an adhesive. An apparatus for manufacturing a permanent magnet motor with attached permanent magnets, comprising:
a block having a shape along the shape of the surface of the permanent magnet facing the surface to which the adhesive is applied and made of a magnetic material; It has a push rod made of magnetic material for pressing and a magnetic chuck made of magnetic material for centering the permanent magnet.

According to the permanent magnet motor manufacturing apparatus disclosed in the present application, the thickness of the adhesive layer does not become uneven. Furthermore, since the adhesive strength is not affected, the permanent magnet is not peeled off.

1 is a plan sectional view showing a permanent magnet motor according to Embodiment 1; FIG. FIG. 2 is a front view showing the magnet sticking head section according to Embodiment 1; FIG. 3 is a side sectional view taken along the line AA in FIG. 2; FIG. 3 is a plan cross-sectional view taken along the line BB in FIG. 2; 1 is a perspective view showing a permanent magnet according to Embodiment 1; FIG. 4 is an enlarged plan cross-sectional view showing a permanent magnet sticking operation according to Embodiment 1; FIG. 4 is an enlarged plan cross-sectional view showing a permanent magnet sticking operation according to Embodiment 1; FIG. 4 is an enlarged plan cross-sectional view showing a permanent magnet sticking operation according to Embodiment 1; FIG. 4 is an enlarged plan cross-sectional view showing a permanent magnet sticking operation according to Embodiment 1; FIG. 4 is an enlarged plan cross-sectional view showing the tip portion of the magnetic chuck according to Embodiment 1. FIG. FIG. 8 is an enlarged plan cross-sectional view showing the tip shape of the magnetic chuck according to Embodiment 2; FIG. 11 is a plan view showing the shape of a block according to Embodiment 3;

Embodiment 1.
The present invention relates to a sticking device and a sticking method for applying an adhesive to a magnetized permanent magnet before sticking it to a rotor and sticking the permanent magnet to a rotor core in a permanent magnet motor.
FIG. 1 is a plan sectional view showing a permanent magnet motor according to Embodiment 1. FIG. In FIG. 1, a rotor core 30 configured by laminating electromagnetic steel sheets is provided inside a stator 100 coaxially with the stator 100 . In stator 100, stator windings 101 are wound around magnetic pole teeth 102, and in rotor core 30, permanent magnets 10 are attached to magnet attaching grooves 31 with an adhesive.

FIG. 2 is a front view showing the magnet sticking head section 1 according to Embodiment 1, and is a view seen from the magnet sticking surface. 3 is a side sectional view taken along the line AA in FIG. 2, and FIG. 4 is a plan sectional view taken along the line BB in FIG. 5 is a perspective view showing the dome-shaped permanent magnet 10. In the drawing, the axis extending in the longitudinal direction of the permanent magnet 10 with respect to the center of gravity O of the permanent magnet 10 is the Z axis, and the axis extending in the lateral direction is the Y axis. The axis perpendicular to the axis, Z-axis and Y-axis is defined as the X-axis. 2 to 4, the magnet pasting head 1 has a block (curved block installed along the radius of curvature R) 11 for gripping the permanent magnet 10 with magnetic attraction force. It is provided on the side of the side. Further, it has a pushing rod 12 that moves in the X-axis direction within the block 11 . Magnetic chucks 14 made of a magnetic material for centering the permanent magnets 10 are provided on both sides of the block 11 in the Y-axis direction. Further, on one side (lower side) of the block 11 in the Z-axis direction, a positioning block 18 that serves as a positioning reference for the permanent magnet 10 is installed. A Z-axis pusher 16 for pressing the magnet 10 is installed. The magnet sticking head section 1 constitutes the permanent magnet motor manufacturing apparatus of the present application.

The permanent magnet 10 is a neodymium magnet having a surface 10A to which an adhesive 20 is applied and an opposing curved surface 10B. Since the permanent magnet 10 is gripped with the same width as the permanent magnet 10 in the Y-axis direction, the length in the Z-axis direction is equal to or longer than the length of the permanent magnet 10 . Furthermore, the block 11 is made of a magnetic material having a curved surface 11D along the curved surface 10B of the permanent magnet 10, and has a volume equal to or larger than the saturation magnetization region. At least three or more round holes 11A are provided through the block 11 so as to correspond to the length of the plurality of magnets in the Z-axis direction. A cylindrical pushing rod 12 made of a magnetic material is inserted into each penetrating round hole 11A. Although FIG. 2 shows a case where one permanent magnet 10 is installed, there are cases where a plurality of permanent magnets are installed simultaneously in the Z-axis direction.

If the tip 12A of the pushing rod 12 on the surface in contact with the permanent magnet 10 presses the curved surface 10B of the permanent magnet 10 with a flat surface, the attitude of the permanent magnet 10 will not be stable. The tip portion 12A of the pushing rod 12 is processed into a curved shape so as to match the shape along the . In FIG. 4, the tip portion 12A of the pushing rod 12 is depicted as flat, but actually it is formed in a curved shape.
6 to 9, before attaching the permanent magnet 10 to the rotor core 30, the magnet attachment head 1 is set by operating the push rod actuator 13 for driving the push rod 12 back and forth. When retracting (separating from the permanent magnet 10), the curved tip 12A of the pushing rod 12 is kept from protruding from the curved surface 11D of the block 11. - 特許庁Further, the curved surface 11D of the block 11 and the curved tip portion 12A of the pushing rod 12 are oriented in the same direction, and the curved surface 10B of the permanent magnet 10 is aligned with the curved surface 11D of the block 11 and the curved tip portion 12A of the pushing rod 12. to be in line with

That is, the tip portion 12A of the pushing rod 12 having a cylindrical shape (having a round cross section) is curved, and the block 11 is also curved similarly to the pushing rod 12. As shown in FIG. Here, since the pushing rod 12 is formed in a cylindrical shape, if it rotates, the curved surface 11D of the block 11 and the curved tip part 12A of the pushing rod 12 will not be aligned, and a clean arc cannot be drawn. That is, the curved tip portion 12A of the pushing rod 12 protrudes from the curved surface 11D of the block 11. As shown in FIG. Therefore, when the permanent magnet 10 is attached to the block 11, the tip 12A of the pushing rod 12 may damage the permanent magnet 10. - 特許庁Therefore, the curved surface 11D of the block 11 and the curved tip portion 12A of the pushing rod 12 are oriented in the same direction.

When the push rod 12 moves forward (approaches the permanent magnet 10) by the push rod actuator 13, the curved tip 12A of the push rod 12 protrudes about 30 mm from the curved surface 11D of the block 11, and the permanent magnet 10 is stabilized. to push it straight out. As shown in FIG. 4, magnetic chucks 14 made of a magnetic material for centering the permanent magnet 10 are installed on both sides of the block 11 so that the center line of the block 11 is positioned on the X-axis of the permanent magnet 10; A magnetic chuck actuator 15 for opening and closing the magnetic chuck 14 is provided. It is important to equalize the closing speed of the left and right magnetic chucks 14 so that the center line of the block 11 is positioned on the X-axis of the permanent magnet 10 .

In addition, since the permanent magnet 10 is cracked or chipped when an impact is applied to the permanent magnet 10, it is necessary to adjust the speed and gripping force to such an extent that cracking or chipping does not occur. Further, below the block 11 in the Z-axis direction, there is a prismatic positioning block 18 made of a non-magnetic material. 16 is provided. A Z-axis pusher actuator 17 for vertically driving the Z-axis pusher 16 is installed, and the magnet sticking head section 1 is composed of the components described above.

The position where the permanent magnet 10 is pressed against the positioning block 18 is used as a positioning reference in the Z-axis direction. If only one permanent magnet 10 is installed in the Z-axis direction as shown in FIG. 3, the Z-axis pusher 16 and the positioning block 18 may be made of a magnetic material. On the other hand, in the case of so-called two-row pasting, in which two or more pieces are aligned in the Z-axis direction and arranged on the circumference of the rotor core 30, if the material of the Z-axis pusher 16 and the positioning block 18 is a magnetic material, one row is used. The positioning block 18 is in contact with the bottom of the permanent magnets 10, and since the positioning block 18 is made of a magnetic material, the magnetic attraction of the permanent magnets 10 in the second row in the Z-axis downward direction increases. Since the direction is not directed to the normal direction of the attachment surface of the magnet attaching groove 31 but is drawn toward the first row of permanent magnets 10, the second row of permanent magnets 10 to be attached is not aligned with the first row of permanent magnets. It will be on top of 10. Therefore, in this case, the Z-axis pusher 16 and positioning block 18 are made of non-magnetic material.

Next, a method of sticking the permanent magnet 10 by the magnet sticking head section 1 will be described. First, a method of installing the pre-magnetized permanent magnet 10 in the magnet sticking head section 1 will be described. First, the Z-axis pusher actuator 17 is driven backward (in the direction away from the permanent magnet 10) to raise the Z-axis pusher 16. As shown in FIG. Further, the magnetic chuck actuator 15 is driven backward (in the direction away from the permanent magnet 10) to open the magnetic chuck 14. As shown in FIG. Further, the pushing rod actuator 13 is driven forward to push the pushing rod 12 out of the curved surface 11D of the block 11. As shown in FIG. The state at this time is defined as the initial state.

Next, as shown in FIG. 2, the adhesive 20 is linearly applied to the surface 10A to be applied, which is the plane side of the pre-magnetized permanent magnet 10. Next, as shown in FIG. In this case, as shown in FIG. 9 later, the amount of adhesive 20 applied is such that the adhesive 20 protrudes from the gap between the side surface 10C of the permanent magnet 10 and the side wall 31A of the magnet attachment groove 31 and reaches the upper surface 31B of the side wall 31A of the magnet attachment groove 31. set to the amount of By pressing the curved surface 10B of the permanent magnet 10 against the pushing rod 12, which is a magnetic material protruding from the curved surface 11D of the block 11, the permanent magnet 10 is attracted using magnetic attraction. Next, when the pushing rod actuator 13 is driven backward to retreat the pushing rod 12, the curved surface 11D of the block 11 and the curved surface 10B of the permanent magnet 10 come into contact with each other, and the block 11 is moved by magnetic attraction force. A permanent magnet 10 is attracted and fixed.

Next, when the Z-axis pusher actuator 17 is driven forward (to approach the permanent magnet 10) to lower the Z-axis pusher 16, the permanent magnet 10 pushed by the Z-axis pusher 16 comes into contact with the positioning block 18 and is positioned. The position of the permanent magnet 10 in the Z-axis direction is determined. If the Z-axis pusher 16 impacts the permanent magnet 10, the magnet cracks or breaks, so the speed of the Z-axis pusher actuator 17 needs to be slowed down. Next, the permanent magnet 10 is centered by driving the magnetic chuck actuator 15 forward and simultaneously driving the magnetic chucks 14 on both sides with the same force. The Z-axis direction center of the block 11 shown in FIG. Installation of the permanent magnet 10 is completed.

Since the permanent magnet 10 is installed without opening the magnetic chuck 14 and the Z-axis pusher 16, the side surface of the permanent magnet 10 in contact with the magnetic chuck 14 and the Z-axis pusher 16 may be damaged. Therefore, it is necessary to lower the air pressure of the magnetic chuck actuator 15 and the Z-axis pusher actuator 17 . Since the setting of the air pressure is related to the plating process of the permanent magnet 10 and the frictional force between the permanent magnet 10 and the magnetic chuck 14 and the Z-axis pusher 16, it is necessary to verify it in advance by experiments or the like.

Next, a method of adhering the permanent magnet 10 installed in the magnet adhering head portion 1 to the rotor core 30 will be described. 6 to 9 are enlarged plan cross-sectional views showing a method of attaching the permanent magnet 10 installed in the magnet attaching head portion 1 to the rotor core 30. FIG. FIG. 6 is a cross-sectional view showing the state when the magnet pasting head 1 is brought closer to the rotor core 30, and FIG. FIG. 8 is a cross-sectional view showing the operation of peeling off the permanent magnet 10 from the block 11, and FIG. 9 is a cross-sectional view showing the completed attachment.

After the permanent magnets 10 are installed in the magnet sticking head section 1 as described above, when the magnet sticking head section 1 is brought closer to the rotor core 30, as shown in FIG. Positioning is performed such that the X axis is aligned with the center of the magnet attaching groove 31 formed in the rotor core 30, and the magnet attaching head portion 1 is brought closer to the rotor core 30, thereby obtaining the state shown in FIG. When the magnet applying head 1 is brought closer to the rotor core 30, the adhesive 20 is crushed as shown in FIG. FIG. 7 shows a state in which the approach of the magnet pasting head portion 1 is stopped. It is necessary to set the stop position at an appropriate position, and the distance between the bottom surface of the permanent magnet 10 and the bottom surface of the magnet attaching groove 31 is the diameter of the bead contained in the adhesive 20 as a minimum value, and the permanent magnet 10 is set to the rotor core. The distance at which the permanent magnet 10 does not break even if it jumps to 30 is set to the maximum value. Then, it is important to determine the distance through experiments, etc. in advance so that it is set within the range from the minimum value to the maximum value, and to control the magnet so that it stops at the distance determined by the verification result from the surface where the magnet is attached. .

Next, when the push bar 12 is pushed out while the magnet pasting head 1 is retreated (separated from the permanent magnet 10), the permanent magnet 10 attracted to the block 11 is pulled off by the magnetic attraction force, and the magnetic attraction force moves toward the rotor core 30 side. , the permanent magnet 10 is attracted. This state is shown in FIG. If the speed at which the magnet application head 1 is retreated, that is, the speed at which the block 11 is retreated is too fast than the speed at which the pushing rod 12 advances (approaches the permanent magnet 10), the magnet application head 1 will not move beyond the stopping position of the permanent magnet. Since the distance between the bottom surface of the magnet attachment groove 31 and the bottom surface of the magnet attachment groove 31 increases, the permanent magnet 10 may crack or chip. Therefore, the speed at which the magnet pasting head 1 is retracted must be set equal to or lower than the forward speed of the pushing rod 12 .

Here, the block 11 does not move individually, but moves together with the block 11 and the push bar 12 as a whole. In other words, if the entire magnet sticking head moves too quickly, it will be the same as sticking the permanent magnet 10 at a position retreated from the sticking position. Or chipping may occur. Then, the pushing rod 12 moves forward, and the entire magnet sticking head (including the block 11) is retracted from the state in which the permanent magnet 10 is pressed against the sticking surface.

Next, the permanent magnet 10 is separated from the pushing rod 12 by further retreating the magnet sticking head portion 1, and the permanent magnet 10 is completely separated from the magnet sticking head portion 1, and the permanent magnet 10 is stuck to the magnet sticking groove 31. is completed. This state is shown in FIG. Next, by returning to the initial state, magnet attachment can be performed repeatedly.

FIG. 10 is an enlarged plan cross-sectional view showing the tip portion of the magnetic chuck 14, showing the shape of the tip of the magnetic chuck 14 that prevents the adhesion of the adhesive 20. As shown in FIG. The magnetic chuck 14 has not only the role of centering and chucking the permanent magnet 10 but also the purpose of strengthening the magnetic attraction force to the magnet sticking head portion 1 . Supposing that the permanent magnet 10 is magnetically attracted only by the block 11, when the magnet attachment groove 31 formed in the rotor core 30 is approached, the magnetic attraction force toward the rotor core 30 side is reduced by the influence of the side wall 31A of the magnet attachment groove 31. It becomes stronger than the magnetic attraction force on the sticking head portion side, and the permanent magnet 10 magnetically attracted to the magnet sticking head portion 1 before the bottom surface of the permanent magnet 10 contacts the magnet sticking groove 31 jumps to the rotor core 30 side and becomes permanent. Cracking or chipping of the magnet 10 may occur. As a countermeasure, by chucking the side surface 10C of the permanent magnet 10 with a part made of a magnetic material, the leakage magnetic flux from the side surface 10C of the permanent magnet 10 can be reduced. Even if the distance from the bottom surface of the sticking groove 31 approaches, the permanent magnet 10 is prevented from jumping. Furthermore, since the film thickness of the applied adhesive 20 softens the impact, it is possible to prevent cracking or chipping of the permanent magnet 10 .

Next, measures against adhesion of the protruding adhesive 20 to the magnetic chuck 14 will be described. In this type of motor, if the gap between the outer surface of the permanent magnet 10 adhered to the rotor core 30 and the inner surface of the stator 100 is uneven for each permanent magnet, the motor output may fluctuate. . Therefore, the bottom surface of the permanent magnet 10 and the bottom surface of the magnet attachment groove 31 formed on the outer surface of the rotor core 30 must be parallel to each other, and the adhesive 20 must be adhered to form a layer of uniform thickness. If the gap between the outer surface of the permanent magnet 10 and the inner surface of the stator 100 is nonuniform for each permanent magnet, minute torque fluctuations occur periodically, and the motor used in the hoisting machine of the elevator deteriorates the riding comfort. It can also make things worse.

Therefore, when this type of permanent magnet 10 is adhered to the rotor core 30, the adhesive 20 is applied to either the bottom surface of the permanent magnet 10 or the bottom surface of the magnet attachment groove 31, and the self weight of the permanent magnet 10 is applied during fitting. The adhesive 20 is raised around the permanent magnet 10 by the external force, the attachment method, and the magnetic attraction force of the permanent magnet 10, and the attachment state of the permanent magnet 10 is confirmed by visually checking the raised state. However, since there is a problem that the protruding adhesive 20 adheres to the magnetic chuck 14, a certain amount of adhesive is applied to the bottom surface of the permanent magnet 10, which is a fixed position, and the adhesive protruding to the salient upper surface of the rotor core 30 is applied. The shape of the magnetic chuck 14 is measured in advance, and the edge of the magnetic chuck 14 is cut into a rectangular shape 14A so that the protruding adhesive 20 does not adhere to the magnetic chuck 14 .

As a result, the adhesive 20 does not adhere to the magnetic chuck 14, and the shape of the protruding adhesive 20 can be visually recognized. Furthermore, since there is no need for an operator to remove the adhesive 20, there is no need to temporarily stop the equipment, and continuous automatic production is possible.
If the protruding adhesive 20 can be seen to protrude from the top, bottom, left, and right of the permanent magnet 10, it is determined that the adhesive 20 spreads the gap between the bottom surface of the permanent magnet 10 and the bottom surface of the magnet attachment groove 31 evenly. can do.

That is, in the present embodiment, a magnet attachment groove 31 matching the shape of the permanent magnet 10 is formed in the electromagnetic steel sheet, the permanent magnet 10 is pushed into the magnet attachment groove 31, and the bottom surface of the permanent magnet 10 and the magnet attachment groove 31 are aligned. 9, flow out through the gap between the side wall 31A of the magnet attachment groove 31 and the side face 10C of the permanent magnet 10 facing each other, as shown in FIG. The applied state of the adhesive 20 can be confirmed by visually checking the adhesive 20 protruding from the upper surface 31B of the side wall 31A of the magnet attachment groove 31. FIG. As a result, it can be confirmed that an appropriate amount of the adhesive 20 is applied, and that the adhesive 20 spreads evenly in the gap between the bottom surface of the magnet attachment groove 31 and the bottom surface of the permanent magnet 10 facing each other. Therefore, the bonding strength can be guaranteed.

As described above, according to the present embodiment, in the permanent magnet motor, when the permanent magnets 10 are adhered to the rotor core 30, the adhesive 20 is uniformly filled over the entire surface between the permanent magnets 10 and the rotor core 30. It can be easily and reliably confirmed. Further, the magnetized permanent magnets 10 can be adhered with high accuracy to the magnet adhesion grooves 31 formed in the rotor core 30 .
Further, when the magnetized permanent magnet 10 is brought closer to the rotor core 30, a magnetic attraction force is generated between the permanent magnet 10 and the rotor core 30, and the force of the magnet sticking head portion 1 holding the permanent magnet 10 is applied to the permanent magnet 10 and the rotor core. 30, the permanent magnet 10 jumps to the rotor core 30, and the permanent magnet 10 may crack or chip. Therefore, in order to prevent cracking or chipping of the permanent magnet 10, a mechanism for strengthening the holding force of the permanent magnet 10 is provided.

Embodiment 2.
FIG. 11 is an enlarged plan cross-sectional view showing the tip shape of the magnetic chuck 14 according to the second embodiment. The tip shape of the magnetic chuck 14 is cut into an arc shape 14B. Since the shape of the adhesive 20 protruding from the side wall of the magnet sticking groove 31 is spherical, the tip of the magnet chuck 14 is processed to be arc-shaped. As a result, the amount of cutting is suppressed as compared with cutting at a right angle, and the cross-sectional area of the tip of the magnetic chuck 14 is increased, so that the magnetic attraction force can be strengthened. Therefore, the distance at which the permanent magnet 10 jumps to the rotor core 30 can be made closer.

Embodiment 3.
12 is a plan view showing the shape of a block according to Embodiment 3. FIG. In order to shorten the distance at which the permanent magnet 10 jumps to the rotor core 30 , it is desirable to set the magnetic attraction force to the magnet pasting head section 1 equal to or greater than the magnetic attraction force to the rotor core 30 . Therefore, it is effective to configure the block 40 such that the magnetic chuck and the block are integrated. Since the gap between the magnetic chuck 14 and the block 11 as shown in FIG. 6 is eliminated, the magnetic attractive force is strengthened, and the distance at which the permanent magnet 10 jumps to the rotor core 30 can be further reduced.

In addition, the number, dimensions, materials, etc. of the above-described components can be changed as appropriate.
Further, while this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may not be consistent with particular embodiments. The embodiments are applicable singly or in various combinations without being limited to the application.
Therefore, countless modifications not illustrated are envisioned within the scope of the technology disclosed in the present application. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

10 permanent magnet, 11 block, 12 push bar, 14 magnetic chuck,
16 Z-axis pusher, 18 positioning block, 20 adhesive, 30 rotor core,
31 magnet attaching groove, 100 stator, 101 stator winding.

Claims (5)

Manufacture of a permanent magnet motor comprising a stator provided with stator windings, a rotor core arranged coaxially inside the stator, and permanent magnets adhered to magnet pasting grooves provided in the rotor core with an adhesive. a device,
a block having a shape along the shape of the surface of the permanent magnet facing the surface to which the adhesive is applied and made of a magnetic material;
a push rod made of a magnetic material inserted into a hole provided in the block and pressed against the permanent magnet;
An apparatus for manufacturing a permanent magnet motor comprising a magnet chuck made of a magnetic material for centering the permanent magnet. a positioning block provided on one side of the permanent magnet in the Z-axis direction and made of a non-magnetic material for positioning the permanent magnet;
2. The manufacturing of the permanent magnet motor according to claim 1, further comprising a Z-axis pusher made of a non-magnetic material and provided on the other side of the permanent magnet in the Z-axis direction for pressing the permanent magnet against the positioning block. Device. 3. The apparatus for manufacturing a permanent magnet motor according to claim 1, wherein a notch is provided at a corner of the tip of said magnetic chuck. 4. The apparatus for manufacturing a permanent magnet motor according to claim 3, wherein said notch portion is formed in an arc shape. 5. The apparatus for manufacturing a permanent magnet motor according to claim 1, wherein the magnetic chuck and the block are integrated.

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