JP2006020379A - Process and apparatus for manufacturing rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a process and an apparatus for manufacturing a rotor in which a magnet can be positioned surely in a magnet insertion hole made in a rotor core, and thermosetting resin poured in order to secure the magnet in the magnet insertion hole can be heat cured without requiring a large heating furnace. <P>SOLUTION: The rotor is manufactured by a step for magnetizing one side of a not-yet-magnetized material 14A as a magnet 14, a step for inserting the magnet 14 into a magnet insertion hole 16 made in a rotor core 4 such that one side of the magnet 14 is attracted to the inner or outer circumferential surface of the magnet insertion hole 16, a step for pouring thermosetting resin into the magnet insertion hole 16 and heat curing it, and a step for magnetizing the other side of the magnet 14 opposing the one side with a polarity different from that on the one side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a magnet-embedded rotor configured by mounting a magnet in a hole of a rotor core and an apparatus therefor.

  In order to fix the magnet to the rotor core of the rotating electrical machine, a method of press-fitting the magnet into a hole formed in the rotor core or a method of injecting a resin material after inserting the magnet into the hole is employed. . In the former method in which the magnet is press-fitted into the hole, a high torque is applied to the rotor core when the rotating electrical machine is driven, so that the magnet may be deformed. Further, in the latter method of injecting the resin material, since the hole portion is previously formed larger than the outer shape of the magnet, a gap is generated between the magnet and the rotor core made of the thin steel plate that defines the hole portion. The magnet is displaced inside the hole, and the position of the magnet varies. Further, since a gap is generated between the magnet and the hole, there is a problem that the magnet moves in the hole when the rotating electrical machine is driven or stopped, and a collision sound is generated. To solve this problem, the magnet is positioned using a cylindrical jig that can insert the rotor core, and then the thermosetting property is formed in the gap between the magnet and the thin steel plate of the rotor core. A method of injecting resin and fixing a magnet has been proposed (Patent Document 1).

JP 2002-272033 A

  In the method of positioning a magnet using a cylindrical jig as described above, an attracting magnet for attracting the magnet is provided on the cylindrical surface of the jig. According to this method, the magnet is positioned in the hole of the rotor core using the jig, and then the thermosetting resin is injected to fix the magnet in the hole. In this case, when the thermosetting resin is solidified, it must be put into a heating furnace with a jig attached to the rotor core. Eventually, a large heating furnace for integrating and heating the jig and the rotor core is required, which may cause an increase in space and an increase in product cost.

  Therefore, the present invention can reliably position the magnet in the hole formed in the rotor core without using a dedicated jig, and solidifies the thermosetting resin injected to fix the magnet in the hole. An object of the present invention is to provide a rotor manufacturing method and apparatus capable of saving space and reducing the product cost without requiring a large heating furnace for receiving the rotor core together with the jig. .

  The object of the present invention is to provide a first magnetizing step for magnetizing one surface side of an unmagnetized member into a magnet in a method for manufacturing a rotor having a rotor core, and a magnet insertion hole formed in the rotor core. Inserting the magnet, adsorbing one side of the magnet to the inner peripheral surface or outer peripheral surface of the magnet insertion hole, and injecting a thermosetting resin into the magnet insertion hole, the thermosetting And a second magnetizing step of magnetizing the magnet so that the polarities of the other surface opposite to the one surface of the magnet are different from each other. (Invention of Claim 1).

  According to the present invention, by inserting a magnet magnetized on one side into a magnet insertion hole formed in the rotor core, a magnet insertion hole can be obtained without using a dedicated jig for positioning and holding the magnet. Thus, the magnet can be positioned reliably.

  In the first magnetizing step, a central portion in the circumferential direction of the rotor core of one surface of the non-magnetized member is magnetized with the same polarity as the polarity magnetized in the second magnetizing step, and the central portion An end portion in the circumferential direction of the rotor core adjacent to the magnet is magnetized with a polarity different from the polarity magnetized in the center portion (the invention according to claim 2). Further, in the first magnetizing step, the end portion is magnetized to such an extent that the magnetic force of the central portion is larger than the magnetic force of the end portion and can be demagnetized when the second magnetizing step is performed. Invention described in 1.).

  According to the second and third aspects of the invention, the central portion in the width direction on the one surface side of the non-magnetized member is magnetized with the same polarity as the polarity magnetized in the second magnetizing step, and is adjacent to the central portion. The portion is magnetized with a polarity different from the polarity magnetized at the central portion, the magnetic force at the central portion is larger than the magnetic force at the end portion, and the second portion is demagnetized when the second magnetization step is performed. By magnetizing the end portion in one magnetizing step, it can be easily magnetized so that the polarities of the other surface facing the one surface of the magnet are different.

  In the first magnetization step, the non-magnetized member is magnetized by relatively moving the magnetizing magnet and the non-magnetized member (invention according to claim 4).

  According to the invention of claim 4, since the magnetizing magnet and the non-magnetized member are relatively moved, a magnetizing effect can be obtained in a short time with a simple configuration.

  The object of the present invention is also to insert the magnet into the magnet insertion hole formed in the rotor core, and to inject the thermosetting resin into the gap between the magnet insertion hole and the magnet, thereby thermosetting. In the rotor manufacturing apparatus for mounting a magnet on the rotor core, a bottom plate, a side wall rising from the bottom plate, a guide groove provided along the side wall and for inserting the magnet into the magnet insertion hole, A holding member for holding the magnet inserted in the guide groove, a magnet guide having a magnetizing magnet for magnetizing the non-magnetized member, and the non-magnetized magnet disposed corresponding to the guide groove A pusher that pushes a member into the magnet insertion hole, and moves the unmagnetized member held by the holding member by the pusher from the guide groove to the magnet insertion hole while moving the unmagnetized member relative to the magnet insertion hole. Is achieved by the rotor of the production apparatus, characterized in that for magnetizing the undelivered magnetic member (claim 5).

  According to the present invention, by using a magnet guide having a magnetizing magnet, the magnet can be reliably positioned in the magnet insertion hole by inserting the magnet into the magnet insertion hole formed in the rotor core. it can. Moreover, since the magnet can be reliably positioned in the magnet insertion hole formed in the rotor core in this way, a plurality of unmagnetized members can be magnetized at once, and injected to fix the magnet in the hole. A large heating furnace can be dispensed with in order to thermoset the thermosetting resin thus obtained.

  The rotor manufacturing method according to the present invention will be described in detail below with reference to the accompanying drawings by giving preferred embodiments in relation to an apparatus for carrying out the method.

  FIG. 1 is a perspective view of a rotor A manufactured by the rotor manufacturing method according to the present invention. A cylindrical rotor A shown in FIG. 1 includes a circular rotor body 2 and a rotor core 4 attached to the rotor body 2. The rotor main body 2 has a boss part 6 bulging and formed at a central part thereof, and an outer peripheral wall 7 formed concentrically with the boss part 6, and the boss part 6 and the outer peripheral wall 7 are flat circular walls. 8 are integrally formed integrally. The circular wall 8 is provided with a plurality of cooling holes 9 at an equal angle. In the figure, reference numeral 10 indicates a key groove provided on the outer peripheral wall 7, and reference numeral 11 indicates a hole for inserting a shaft 39 to be described later.

  As can be easily understood from FIG. 1, the rotor core 4 is formed of thin steel plates 12 laminated in the axial direction, and a plurality of magnet insertion holes 16 a to 16 p are formed at equal intervals around the rotor core 4. Yes. A flat magnet 14 is inserted into each of the magnet insertion holes 16a to 16p. In this case, the number of the magnet insertion holes 16a to 16p is not particularly limited, but is 16 in the rotor core 4 in FIG. Therefore, as shown in FIG. 2, the magnet 14 abuts on the outer peripheral surface of the magnet insertion holes 16 a to 16 p, and the clearance 18 formed between the magnet 14 and the magnet insertion holes 16 a to 16 p A thermosetting resin for positioning the magnet 14 is injected (see FIG. 2). As described above, the magnet 14 is not limited to the outer peripheral surface of the magnet insertion holes 16a to 16p, but may be inserted so as to contact the inner peripheral surface. Furthermore, you may provide the retaining part for preventing the fall of this magnet 14 when the magnet 14 is inserted in the bottom part of the hole parts 16a-16p for magnet insertion.

  FIG. 3 shows a magnetizing jig 20 for magnetizing an unmagnetized member 14A on which a plate-like magnet 14 has not yet been magnetized. The magnetizing jig 20 has a rectangular body 21 having a U-shaped cross section, and guides 22a and 22b are formed at the upper ends of the side walls 23a and 23b rising from both sides, respectively. A pedestal 27 is fixed to the bottom of the rectangular body 21 by bolts 25a and 25b, and a permanent magnet 24 is fixed to the pedestal 27 along the longitudinal direction. The non-magnetized member 14A is mounted on the guides 22a and 22b so as to be freely displaceable.

  Therefore, the action of magnetizing the non-magnetized member 14A using the permanent magnet 24 will be described. First, as shown in FIG. 4, when the non-magnetized member 14A passes through the vicinity of the permanent magnet 24 along the guides 22a and 22b, that is, when the permanent magnet 24 and the non-magnetized member 14A are moved relative to each other, The width d of the clearance 26 between the magnetic member 14A and the permanent magnet 24 is set to be 0.1 to 0.5 mm. Therefore, the non-magnetized member 14A is bridged on the guides 22a and 22b of the magnetizing jig 20, and moved in the direction of arrow X in FIG. As shown in FIG. 5A, when the non-magnetized member 14A arrives above the permanent magnet 24, the upper surface of the permanent magnet 24 is magnetized to the N pole. Thus, as the S pole, the lower surface side (one surface side) is magnetized in a wide range and the upper surface side (other surface side) is magnetized in a narrow range (see FIGS. 5A and 6). As can be understood from FIG. 5A, both end portions of the lower surface of the non-magnetized member 14 </ b> A are narrowly magnetized as N poles. Here, the magnetization is referred to as a first magnetization step.

  When the non-magnetized member 14 </ b> A is magnetized by the permanent magnet 24 in this way, the non-magnetized member 14 </ b> A becomes the magnet 14. Here, in the present embodiment, the ratio of the magnetic force between the magnetization center portion 28 that is the S pole and the magnetization end portion 30 that is the N pole is approximately 4: 1 by the permanent magnet 24 on the one surface side 34 of the magnet 14. The ratio of the magnetization center portion 28 that is the S pole of the magnet 14 to the magnetization end portion 30 that is the N pole is approximately 2: 1. A second magnetization step was performed in which the magnet 14 was magnetized so that the polarities of the one surface side 34 and the other surface side 36 of the magnet 14 were different from each other when the magnet 14 was magnetized at the magnetic force ratio as described above. In this case, the entire surface of the one surface side 34 can be magnetized in the same polarity as the magnetization center portion 28, and the entire other surface side 36 can be magnetized in a different polarity from the magnetization end portion 30, that is, in the N pole.

  When the polarity on the upper surface side of the permanent magnet 24 facing the non-magnetized member 14A is set as the S pole and the non-magnetized member 14A is magnetized by the permanent magnet 24, the magnetization center portion 28 on the one surface side 34 has an N pole and magnetization. Those skilled in the art will naturally understand that the end 30 is magnetized to the S pole and the magnetization center 32 on the other side 36 is magnetized to the N pole.

  Next, a method for manufacturing the rotor A will be specifically described.

  First, a cylindrical rotor A having a rotor core 4 formed by laminating thin steel plates 12 in the axial direction is prepared. It is assumed that magnet insertion holes 16a to 16p for inserting the magnet 14 shown in FIG. 1 are formed in the rotor core 4 in advance.

  Next, the magnet 14 magnetized by the steps shown in FIGS. 3 to 5 is inserted into the magnet insertion holes 16a to 16p. Since the one surface side 34 and the other surface side 36 of the magnet 14 are magnetized at the above-described ratio, the magnet 14 comes into contact with the outer peripheral surfaces of the magnet insertion holes 16a to 16p. When the magnetization center portion 28 of the magnet 14 faces the inner peripheral surface of the magnet insertion holes 16a to 16p, the magnet 14 is attracted to the inner peripheral surface, and the magnetization center portion 28 of the magnet 14 is inserted into the magnet. When facing the outer peripheral surfaces of the hole portions 16a to 16p, the magnet 14 is attracted to the outer peripheral surface. When the magnet 14 is inserted into the magnet insertion holes 16a to 16p, the magnet 14 is generally inserted so that the polarity of the magnetization center portion 28 of the other magnet 14 adjacent to the magnet 14 is different. That is, when the one surface side 34 of the magnet 14 faces the outside of the rotor A in the magnet insertion hole 16a, the other surface side 36 of the magnet 14 is connected to the rotor A in the adjacent magnet insertion hole 16b. It is arranged so as to face the outside, and so on.

  Next, a thermosetting resin is injected into the clearance 18 and the thermosetting resin is heated and cured. By thermosetting the thermosetting resin, the magnet 14 can be positioned in the magnet insertion holes 16a to 16p while being attracted to the outer peripheral surfaces of the magnet insertion holes 16a to 16p. The method for thermosetting the thermosetting resin is not particularly limited, but as a simple method, the magnet 14 is inserted into the magnet insertion holes 16a to 16p, and the rotor A into which the thermosetting resin is injected is heated. A method of thermosetting in an oven can be used.

  Further, a step is performed in which the entire surface of the one surface side 34 of the magnet 14 is magnetized so as to have the same polarity as that of the magnetization center portion 28, and the entire surface of the other surface side 36 of the magnet 14 is magnetized with a polarity different from that of the magnetization end portion 30. . In this magnetizing step, for example, the magnet 14 can be magnetized using a known magnetizing device disclosed in Japanese Patent Laid-Open No. 9-163692. FIG. 7 is a schematic plan view of a magnetizing device 80 for this magnetizing process. As shown in FIG. 7, the magnetizing device 80 has a cylindrical shape, and a plurality of magnetic pole cores 84 divided in the circumferential direction by grooves 82 are disposed on the side surface portion, and a coil 86 is provided in each magnetic pole core 84. It is rolled up. A current supply device 88 is connected to the coil 86. Here, the magnetization is referred to as a second magnetization step.

  Magnetization of the magnet 14 by the magnetizing device 80 is performed by inserting the rotor A into the central portion of the magnetizing device 80 while aligning the magnet 14 and the magnetic pole core 84, and supplying current to the coil 86 from the current supply device 88. By doing so, the magnet 14 is magnetized. In the magnet 14, the surface into which the magnetic lines generated from the coil 86 enter is magnetized to the N pole, and the surface from which the magnetic lines generated from the coil 86 exit is magnetized to the S pole.

  The rotor A can be manufactured by the manufacturing method described above.

  According to the rotor A according to the present embodiment, the non-magnetized member 14 </ b> A is magnetized using the magnetizing jig 20 and inserted into the magnet insertion holes 16 a to 16 p formed in the rotor core 4. The magnet 14 can be reliably positioned in the magnet insertion holes 16a to 16p. Further, in order to magnetize the non-magnetized member 14A using the magnetizing jig 20, there is a holding jig used to hold the non-magnetized member 14A in the magnet insertion holes 16a to 16p. It becomes unnecessary, and the size of the furnace used when the rotor A is put into a heating furnace and thermally cured can be reduced.

  Next, as another embodiment of the present invention, a rotor manufacturing apparatus 40 for automatically manufacturing the rotor A will be described with reference to FIGS. In this case, the rotor manufacturing apparatus 40 includes a pusher 42 and a magnet guide 60.

  The pusher 42 is used to automatically insert the magnet 14 set in the magnet guide 60 into the magnet insertion holes 16a to 16p. The pusher 42 includes a disk-shaped support plate 44, a shaft 48 attached to the center portion of the support plate 44 via a bolt 45, and a pressing portion 50 fixed to an outer peripheral portion of the support plate 44. The pressing portion 50 is located on the circumferential portion of the support plate 44 and is annularly arranged corresponding to the guide groove 66 provided in the magnet guide 60, and the magnet 14 inserted into the magnet insertion holes 16a to 16p. The same number as the number. In this case, the support plate 44 is formed with a hole 46 for inserting the shaft 48 at the center. The shaft 48 is a shaft for connecting to a guide shaft 65 of a magnet guide 60 described later, and a center hole 52 for inserting a tip 65a of the guide shaft 65 is provided. The pressing part 50 is for pressing the magnet 14 inserted in the guide groove 66 provided in the magnet guide 60 and inserting it into the magnet insertion holes 16a to 16p. Here, FIG. 11 is a diagram in which the magnets 14 are inserted into the guide grooves 66. In FIG. 11, since the number of the magnets 14 inserted into the rotor A is 16, the number of the pressing portions 50 of the pusher 42 is the same. Will be 16.

  The cylindrical magnet guide 60 includes a bottom plate 61, a side wall 62 that rises upward from the periphery of the bottom plate 61, a guide shaft 65 that is erected at the center, and 16 pieces of outside guides that are provided outside the side wall 62. A magnetizing jig 20A is provided, and 16 guide grooves 66 are provided around the side wall 62 corresponding to the 16 magnetizing jigs 20A as shown in FIG. A shaft aligning portion 63 for fitting with the boss portion 6 of the rotor A is screwed to the lower portion of the bottom plate 61 with a screw 64. An alignment key 77 screwed to the bottom plate 61 with a screw 76 is fitted into the key groove 10 and positioned. A bottomed cylindrical spring receiving portion 70 is formed at the upper end of the guide shaft 65, and a spring 72 is interposed between the spring receiving portion 70 and the bottom plate 61. The spring 72 is provided to return the pusher 42 to the position before the magnet 14 is inserted after the magnet 14 is pressed by the pusher 42 and the magnet 14 is inserted into the magnet insertion holes 16a to 16p.

  The guide groove 66 is annularly arranged along the side wall 62 of the magnet guide 60, opens upward in the side wall 62, has substantially the same shape as the magnet 14, and extends in the axial direction. A ball plunger that temporarily holds the non-magnetized member 14A inserted in the guide groove 66 on the inner peripheral surface of the guide groove 66 and opens the non-magnetized member 14A when pressed by the pressing portion 50 of the pusher 42. 68 (holding member) is provided. The magnetizing jig 20 </ b> A is screwed to the side wall 62 of the magnet guide 60 by a screw 74 at a position corresponding to the outer peripheral surface of the guide groove 66. The magnetizing jig 20 </ b> A is used to magnetize the non-magnetized member 14 </ b> A in the same manner as the magnetizing jig 20.

  FIG. 10 is a perspective view showing the magnetizing jig 20 </ b> A in a state before being screwed to the side wall 62 of the magnet guide 60. As can be seen from FIG. 10, the magnetizing jig 20 </ b> A has the same structure as the magnetizing jig 20. The magnetizing jig 20A has a rectangular body 21A having a U-shaped cross section, and guides 22c and 22d are formed at the ends of the surface abutting against the side wall 62 of the magnet guide 60, respectively. A permanent magnet 24A is fixed between the two.

  Next, a method for manufacturing the rotor A using the rotor manufacturing apparatus 40 will be described.

  First, the shaft 39 provided at the center of the base plate 38 is inserted into the hole 11 of the rotor A, and then the positions of the magnet insertion holes 16a to 16p and the guide groove 66 are aligned, and the alignment key 77 is pressed. The key 76 is fitted and the screw 76 is tightened. Next, the non-magnetized member 14 </ b> A is inserted into each guide groove 66 of the magnet guide 60. The non-magnetized member 14 </ b> A inserted into the guide groove 66 is elastically held in the guide groove 66 by the ball plunger 68. Next, the guide shaft 65 is inserted into the center hole 52 of the shaft 48, and the pressing portion 50 is aligned to a position where the unmagnetized member 14 </ b> A inserted into the guide groove 66 can be pressed. Next, the pusher 42 is lowered along the guide shaft 65, and the pressing portion 50 is brought into contact with the non-magnetized member 14A. Further, the pusher 42 is lowered along the guide shaft 65 until the unmagnetized member 14A reaches the positions of the magnet insertion holes 16a to 16p. As a result, the ball provided on the ball plunger 68 is elastically retracted, and the magnet 14 descends along the guide groove 66 (see FIG. 12).

  The unmagnetized member 14A descending along the guide groove 66 passes through the vicinity of the permanent magnet 24A, that is, by moving the permanent magnet 24A and the unmagnetized member 14A relative to each other, as shown in FIGS. 5A to 5C. Magnetized. The magnet 14 magnetized by the permanent magnet 24A descends to the magnet insertion holes 16a to 16p and is attracted to the outer peripheral surfaces of the magnet insertion holes 16a to 16p.

  After the magnet 14 is attracted to the outer peripheral surfaces of the magnet insertion holes 16a to 16p, the magnet guide 60 is removed from the rotor A, a thermosetting resin is injected into the clearance 18, and the thermosetting resin is heated and thermoset. Let By thermosetting the thermosetting resin as described above, the magnet 14 can be positioned in a state of being attracted to the outer peripheral surfaces of the magnet insertion holes 16a to 16p.

  Further, a second magnetizing step is performed on the magnet 14 using the magnetizing device 80 shown in FIG. Magnetization of the magnet 14 by the magnetizing device 80 is performed by inserting the rotor A into the central portion of the magnetizing device 80 while aligning the magnet 14 and the magnetic pole core 84, and supplying current to the coil 86 from the current supply device 88. By doing so, the magnet 14 is magnetized. By this second magnetization process, the entire surface of the one surface side 34 is magnetized so as to have the same polarity as the magnetization center portion 28, and the entire surface of the other surface side 36 of the magnet 14 is magnetized with a polarity different from that of the magnetization end portion 30. The

  By manufacturing the rotor A using the rotor manufacturing apparatus 40 according to the present embodiment, the magnet 14 can be reliably positioned in the magnet insertion holes 16a to 16p. Moreover, since the magnet 14 can be simply inserted into the plurality of magnet insertion holes 16a to 16p, the working efficiency can be improved.

  Note that the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

It is a perspective view of a rotor. It is a partial expanded sectional view of the magnet hole in which the magnet was inserted. It is a figure which shows the state which set the magnet to the magnetizing jig. It is sectional drawing of the magnetizing jig of FIG. 5A is a diagram illustrating a state of one surface of a magnetized magnet, FIG. 5B is a diagram illustrating a magnetized state on one surface side of the magnet, and FIG. 5C is a magnetized state on the other surface side of the magnet. FIG. It is a figure which shows the state of the magnetic force line of the magnet magnetized by FIG. It is a schematic plan view of a magnetizing device. It is a disassembled perspective view of the manufacturing apparatus of a rotor. It is sectional drawing of the manufacturing apparatus of the rotor with which the rotor was mounted | worn. It is a perspective view of the magnetizing jig provided in the manufacturing apparatus of a rotor. It is sectional drawing along the XI-XI line of FIG. It is sectional drawing of the rotor manufacturing apparatus which shows the state which pressed the magnet with the pusher and the magnet was inserted in the magnet hole.

Explanation of symbols

A ... Rotor 2 ... Rotor body 4 ... Rotor core 6 ... Boss part 7 ... Outer peripheral wall 8 ... Circular wall 9 ... Cooling hole 10 ... Key groove 11 ... Hole part 12 ... Thin steel plate 14 ... Magnet 14A ... Unmagnetized member 16a-16p ... Magnet insertion holes 18, 26 ... Clearance 20, 20A ... Magnetizing jigs 21, 21A ... Rectangular bodies 22a, 22b, 22c, 22d ... Guides 23a, 23b, 62 ... Side walls 24, 24A ... Permanent magnets 25a, 25b 45 ... Bolt 27 ... Base part 28, 32 ... Magnetization center part 30 ... Magnetization end part 34 ... One side 36 ... Other side 39, 48 ... Shaft 40 ... Rotor manufacturing device 42 ... Pusher 44 ... Support plate 46 ... Hole 50 ... Pressing part 52 ... Center hole 60 ... Magnet guide 61 ... Bottom plate 63 ... Axis alignment part 64, 74, 76 ... Screw 65 ... Guide shaft 65a ... Tip 66 ... Guide groove 68 ... Ball plunger 70 ... Spring Only part 72 ... spring 77 ... alignment key

Claims (5)

In a method for manufacturing a rotor having a rotor core,
A first magnetization step of magnetizing one side of the unmagnetized member to make a magnet;
Inserting the magnet into the magnet insertion hole formed in the rotor core, and adsorbing one surface side of the magnet to the inner peripheral surface or outer peripheral surface of the magnet insertion hole;
Injecting a thermosetting resin into the magnet insertion hole, and thermosetting the thermosetting resin;
A method of manufacturing a rotor, comprising: a second magnetizing step of magnetizing the magnet so that the polarity on the other surface facing the one surface is different. The method of manufacturing a rotor according to claim 1,
The first magnetizing step magnetizes the central portion of the rotor core in the circumferential direction of one surface side of the non-magnetized member with the same polarity as the polarity magnetized in the second magnetizing step; A rotor manufacturing method comprising magnetizing an end portion in a circumferential direction of the rotor core adjacent to a portion with a polarity different from a polarity magnetized in the central portion. In the manufacturing method of the rotor according to claim 2,
In the first magnetizing step, the end portion is magnetized to such an extent that the magnetic force of the central portion is larger than the magnetic force of the end portion and can be demagnetized when the second magnetizing step is performed. Manufacturing method. The method of manufacturing a rotor according to claim 1,
In the first magnetizing step, the non-magnetized member is magnetized by relatively moving the magnetizing magnet and the non-magnetized member. A rotor that mounts the magnet on the rotor core by inserting a magnet into a magnet insertion hole formed in the rotor core, injecting a thermosetting resin into a gap between the magnet insertion hole and the magnet, and thermosetting the resin. In manufacturing equipment,
The bottom plate,
A side wall rising from the bottom plate;
A guide groove provided along the side wall for inserting the magnet into the magnet insertion hole;
A holding member for holding the magnet inserted in the guide groove;
A magnet guide having a magnetizing magnet for magnetizing an unmagnetized member;
A pusher that is disposed corresponding to the guide groove and pushes the unmagnetized member into the magnet insertion hole,
Manufacturing of a rotor, wherein the non-magnetized member is magnetized while the non-magnetized member held by the holding member by the pusher is relatively moved from the guide groove to the magnet insertion hole. apparatus.

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