JP2021058065A - Manufacturing method of rotary electric machine rotor and manufacturing device for rotary electric machine rotor - Google Patents

Abstract

To provide a manufacturing method of a rotary electric machine rotor capable of highly accurately relatively aligning an insertion jig in which a plurality of guide holes each for guiding a rod-like body constituted of a hard magnetic material are formed, and a rotor core in which a plurality of insertion holes into which the rod-like bodies extruded from the guide holes are inserted are formed, and a manufacturing device for the rotary electric machine rotor.SOLUTION: A manufacturing method of a rotary electric machine rotor includes: a rotor core forming step of laminating a plurality of core plates 3 each constituted of a soft magnetic material and forming a rotor core 21 in which a plurality of insertion holes 211 extending in a lamination direction of the plurality of core plates 3 and a plurality of distribution holes 212 each distributing a coolant are provided; and an insertion step of inserting a rod-like body 220 constituted of a hard magnetic material into each of the plurality of insertion holes 211 in the rotor core 21. In the insertion step, an insertion jig 7 including a plurality of pins 76 which are engaged into the plurality of guide holes 711 and the distribution holes 212 is used to relatively align the insertion jig 7 and the rotor core 21 by engaging the plurality of pins 76.SELECTED DRAWING: Figure 5

Description

The present invention relates to a method for manufacturing a rotary electric rotor and a device for manufacturing a rotary electric rotor.

Conventionally, for example, in a rotary electric rotor used for an electric motor or a generator, a rod-shaped magnet is inserted into a magnet insertion hole provided in a rotor core in which a plurality of core plates made of soft magnetic materials are laminated (for example,). See Patent Document 1).

The rotor described in Patent Document 1 has a circular rotor main body and a rotor core mounted on the outer peripheral side of the rotor main body. The rotor core is formed by laminating thin steel plates in the axial direction, and a plurality of magnet insertion holes extending in the laminating direction are provided at equal intervals in the circumferential direction. The manufacturing equipment for manufacturing this rotor has a cylindrical magnet guide provided with a plurality of guide grooves for temporarily holding the magnet inserted into the magnet insertion hole, and a magnet temporarily held in the guide groove of the magnet guide of the rotor core. It is provided with a pusher having a plurality of pressing portions to be pushed into the magnet insertion hole.

The rotor body has a boss portion formed in the central portion, an outer peripheral wall formed concentrically with the boss portion, and a circular wall that integrally directly connects the boss portion and the outer peripheral wall. A key groove is provided on the outer peripheral wall at one location in the circumferential direction. On the other hand, the alignment key is screwed to the bottom plate of the magnet guide facing the rotor body. When the magnet temporarily held by the magnet guide is pushed into the magnet insertion hole of the rotor core, the key is fitted into the key groove so that the magnet guide and the rotor body are relatively aligned.

Japanese Unexamined Patent Publication No. 2006-20379

In recent years, electric motors have come to be widely used as a drive source for automobiles, and further improvement in efficiency is required. In order to increase the efficiency of the electric motor, it is desirable to make the magnet insertion hole small and to make the gap between the inner surface of the magnet insertion hole and the outer surface of the magnet as small as possible. Then, in order to narrow this gap, it is necessary to align the rotor core and the jig (magnet guide) for temporarily holding the magnet with high accuracy. In this regard, the method of aligning by fitting the key into the keyway as described in Patent Document 1 cannot necessarily suppress the positional deviation between the magnet guide and the rotor body in the radial direction. In addition, there is a possibility that the assembly accuracy of the rotor body and the rotor core may be affected, and the configuration is not always capable of highly accurate alignment.

Therefore, the present invention presents an insertion jig in which a plurality of guide holes for guiding a rod-shaped body made of a hard magnetic material are formed, and a rotor core in which a plurality of insertion holes for inserting the rod-shaped body extruded from the guide holes are formed. It is an object of the present invention to provide a method for manufacturing a rotary electric rotor and a manufacturing apparatus for a rotary electric rotor, which can perform relative alignment with high accuracy.

In order to achieve the above object, the present invention stacks a plurality of core plates made of a soft magnetic material, a plurality of insertion holes extending in the stacking direction of the plurality of core plates, and a plurality of flow holes for flowing a coolant. The rotor core forming step of forming the rotor core provided with the rotor core and the insertion step of inserting a rod-shaped body made of a hard magnetic material into each of the plurality of insertion holes of the rotor core are provided, and the insertion step includes a plurality of guide holes and a plurality of guide holes. Using an insertion jig provided with an engaging portion that engages with the flow hole, the insertion jig and the rotor core are relatively aligned by engaging the engaging portion, and a plurality of rod-shaped bodies are formed. Provided is a method for manufacturing a rotary electric rotor, which is a step of inserting each of the plurality of guide holes into the plurality of insertion holes.

Further, in order to achieve the above object, the present invention is formed by stacking a plurality of core plates made of a soft magnetic material, and a plurality of insertion holes extending in the stacking direction of the plurality of core plates and a coolant are circulated. A rotary electric rotor manufacturing apparatus comprising a rotor core in which a plurality of flow holes are formed and a plurality of rod-shaped bodies made of a hard magnetic material, and the plurality of rod-shaped bodies are respectively inserted into the plurality of insertion holes. The plurality of rod-shaped bodies are provided with an insertion jig having a main body portion formed with a plurality of guide holes for temporarily holding the plurality of rod-shaped bodies and an engaging portion provided so as to project from the main body portion. Provided is a rotary electric rotor manufacturing apparatus in which the insertion jig and the rotor core are relatively aligned by engaging the engaging portion with the flow hole when the insertion hole is inserted into the insertion hole.

According to the method for manufacturing a rotary electric rotor and the manufacturing apparatus for a rotary electric rotor according to the present invention, an insertion jig in which a plurality of guide holes for guiding a rod-shaped body made of a hard magnetic material are formed, and an insertion jig extruded from the guide holes. It is possible to perform relative alignment with high accuracy with the rotor core in which a plurality of insertion holes into which the rod-shaped body is inserted are formed.

It is a block diagram which shows the rotary electric machine which has the rotary electric machine rotor manufactured by the manufacturing method and manufacturing apparatus which concerns on embodiment of this invention. (A) is a perspective view showing a rotor. (B) is a cross-sectional view showing the rotor in an axial cross section along the rotation axis. It is a top view which shows one core plate. It is explanatory drawing which shows the rotor core forming process. (A) is an explanatory diagram showing the first stage of the insertion step. (B) is a partially enlarged view of (a). (A) and (b) are explanatory views showing a state in which the shaft portion of a pair of pins is inserted into the flow hole. It is explanatory drawing which shows the 2nd stage of the insertion process. It is explanatory drawing which shows the fixing process. (A) and (b) are insertion jigs shown in a side view and a top view, and a part of (a) shows a cross section in line AA of (b). (A) shows the lower surface of the insertion jig, (b) is the sectional view taken along line BB of (a), and (c) is the sectional view taken along line CC of (a). (A) to (b) are perspective views showing a holding plate and a pair of pins.

[Embodiment]
Embodiments of the present invention will be described with reference to FIGS. 1 to 11. It should be noted that the embodiments described below are shown as suitable specific examples for carrying out the present invention, and there are some parts that specifically exemplify various technically preferable technical matters. , The technical scope of the present invention is not limited to this specific aspect.

(Structure of rotating electric machine)
FIG. 1 is a configuration diagram showing a rotary electric machine having a rotary electric machine rotor (hereinafter, simply referred to as “rotor”) manufactured by the manufacturing method and manufacturing apparatus according to the embodiment of the present invention.

The rotary electric machine 100 has a stator 1 and a rotor 2. The stator 1 is fixed to the housing (not shown) in a non-rotating manner. The rotor 2 has a shaft 10 inserted in the center thereof, and rotates integrally with the shaft 10. The rotary electric machine 100 is mounted on, for example, an electric vehicle or a so-called hybrid vehicle as a motor that generates a driving force, as a generator that converts the rotational force of the shaft 10 into electric energy, or as a motor generator having both functions. To.

The stator 1 includes a stator core 11 and a plurality of coils 12. The stator core 11 integrally includes a cylindrical base portion 111, a plurality of teeth 112 protruding inward in the radial direction from the base portion 111, and a plurality of fixed portions 113 protruding radially outward from the base portion 111. Have. In the illustrated example of FIG. 1, the stator core 11 has 15 teeth 112, and the coil 12 is wound around each tooth 112. The fixed portion 113 is formed with a bolt insertion hole 113a through which a bolt for fixing the stator core 11 to the housing is inserted.

FIG. 2A is a perspective view showing the rotor 2. FIG. 2B is a cross-sectional view showing the rotor 2 in an axial cross section along the rotation axis O. The rotor 2 has a rotor core 21 and a plurality of magnets 22 held by the rotor core 21. The rotor core 21 is configured by laminating a plurality of core plates 3 made of a soft magnetic material in a laminating direction parallel to the rotation axis O. In FIG. 2, the thickness of the core plate 3 is exaggerated for the sake of clarification of the explanation.

The rotor core 21 is provided with a center hole 210 through which the shaft 10 is inserted, a plurality of insertion holes 211 into which a plurality of magnets 22 are inserted, and a plurality of flow holes 212 through which a cooling liquid for cooling the magnets 22 is circulated. Has been done. A coolant for cooling the heat generated by the rotor core 21 due to iron loss generated by the magnetic fields of the plurality of coils 12 is supplied to the flow hole 212, for example.

The center hole 210, the plurality of insertion holes 211, and the plurality of flow holes 212 penetrate the rotor core 21 in the axial direction (the stacking direction of the plurality of core plates 3). In the present embodiment, the insertion hole 211 and the flow hole 212 extend in parallel with the rotation axis O, but the insertion hole 211 and the flow hole 212 are inclined with respect to the rotation axis O and a plurality of sheets are provided. It may extend in the stacking direction of the core plate 3.

Further, the rotor core 21 has a pair of protrusions 21a that are fitted into a pair of keyways 10a (shown in FIG. 1) of the shaft 10. The shaft 10 is restricted from rotating relative to the rotor core 21 by fitting the protrusion 21a into the keyway 10a.

FIG. 3 is a plan view showing one core plate 3. The core plate 3 is formed by pressing an electromagnetic steel plate. The core plate 3 is provided with a center hole 30, a plurality of through holes 31 for inserting magnets, and a plurality of through holes 32 for flowing coolant. The plurality of through holes 31 and the plurality of through holes 32 are formed by one press working together with the center hole 30. Further, the core plate 3 has a pair of tongue pieces 3a. The protrusion 21a of the rotor core 21 is formed by the tongue pieces 3a of each of the plurality of laminated core plates 3.

The through hole 31 for inserting a magnet is formed in an elongated hole shape, and its major axis direction is inclined with respect to the radial direction and the circumferential direction of the core plate 3. More specifically, ten through holes 31 for inserting magnets whose major axis direction is inclined to one side by a predetermined angle at an angle of less than 90 ° with respect to the radial direction of the core plate 3, and the core plate 3 in the major axis direction. Ten through holes 31 for inserting magnets, which are inclined to the other side by a predetermined angle at an angle of less than 90 ° with respect to the radial direction of the core plate 3, are alternately formed along the circumferential direction of the core plate 3.

In the present embodiment, ten through holes 32 for cooling liquid flow are formed inside the core plate 3 in the radial direction with respect to the through holes 31 for inserting a plurality of magnets. Each through hole 32 for cooling liquid flow has a semicircular rounded rectangular shape at both ends. Further, in the present embodiment, the ten through holes 32 for the coolant flow are four long through holes 321 having a relatively long length in the longitudinal direction and six through holes 32 having a relatively short length in the longitudinal direction. It consists of a short through hole 322.

In the rotor core 21, a plurality of core plates 3 are laminated so that the center holes 30 of the core plates 3 communicate with each other to form a center hole 210, and through holes for inserting a plurality of magnets in each core plate 3 are formed. 31 communicate with each other in the stacking direction to form a plurality of insertion holes 211, and a plurality of through holes 32 for flow of coolant in each core plate 3 communicate with each other in the stacking direction to form a plurality of flow holes 212.

The magnet 22 has a rectangular columnar cross section orthogonal to the longitudinal direction. Further, the magnet 22 is fixed to the rotor core 21 by the resin 23 filled in the insertion hole 211. The end face of the magnet 22 in the longitudinal direction is covered with the resin 23. The magnet 22 is a rod-shaped hard magnetic material obtained by sintering powder such as ferrite or neodymium, and is not magnetized before being accommodated in the insertion hole 211, and is magnetized after being fixed to the rotor core 21. Will be done. In FIG. 2B, the thickness of the resin 23 is exaggerated for the sake of clarification of the explanation.

(Rotor manufacturing method)
Next, a method for manufacturing the rotor 2 and a manufacturing apparatus A for manufacturing the rotor 2 by this manufacturing method will be described. The rotor 2 is manufactured by a core plate forming step of forming a plurality of core plates 3 in which a plurality of through holes 31 and 32 are formed, and a stacking of a plurality of core plates 3 by laminating the plurality of core plates 3. The rotor core forming step of forming the rotor core 21 provided with the plurality of insertion holes 211 extending in the direction and the plurality of flow holes 212 through which the coolant flows, and the plurality of insertion holes 211 of the rotor core 21 are each made of a hard magnetic material. An insertion step of inserting the rod-shaped body 220 (described later), a fixing step of fixing the rod-shaped body 220 in the insertion hole 211, and a magnetizing of the rod-shaped body 220 fixed in the insertion hole 211 to form a magnet 22. It has a process.

In the core plate forming step, the core plate 3 is formed by pressing a thin plate-shaped electromagnetic steel plate. In the rotor core forming step, a plurality of core plates 3 are stacked and laminated in the thickness direction thereof.

FIG. 4 is an explanatory diagram showing a rotor core forming process. The stacking of the core plates 3 is performed by sequentially stacking a plurality of core plates 3 on the pallet 4 in the vertical direction. In FIG. 4, the lower part of the drawing corresponds to the lower side in the vertical direction, and the upper part of the drawing corresponds to the upper side in the vertical direction. Hereinafter, "upper" and "lower" shall mean up and down in the vertical direction.

The pallet 4 includes a base plate 41, a lower plate 42 arranged on the upper side of the base plate 41, an upper plate 43 arranged on the upper side of the lower plate 42, and a plurality of rod-shaped bodies 220 to which the rod-shaped body 220 is abutted in the insertion step described later. Butting pin 44, a bottomed cylindrical tubular body 45 arranged on the base plate 41, a plurality of fixing pins 46 for fixing the tubular body 45 to the base plate 41, and a cal. It has a plurality of positioning pins 47 for positioning the plate (described later).

The base plate 41 is larger than the lower plate 42 and the upper plate 43, and has a rectangular shape in the vertical direction. The lower surface 41a of the base plate 41 is formed on a flat surface without protrusions. The tubular body 45 has a cylindrical tubular portion 451 and a disk-shaped bottom portion 452, and the lower end portion of the tubular portion 451 is inserted through the central portions of the lower plate 42 and the upper plate 43 to hit the base plate 41. I'm in contact. The bottom portion 452 closes the upper end portion of the tubular portion 451. The plurality of positioning pins 47 project upward from the upper surface 452a of the bottom portion 452.

The abutting pin 44 has a large diameter portion 441 inserted into the insertion hole 430 formed in the upper plate 43 and a small diameter portion 442 protruding upward from the upper surface 43a of the upper plate 43, and is provided by the lower plate 42. It is prevented from coming off from the insertion hole 430. The plurality of abutting pins 44 are provided corresponding to each of the plurality of insertion holes 211, and the small diameter portion 442 is arranged so as to project into the insertion holes 211.

The core plate 3 is laminated on the upper plate 43 so that the tubular body 45 is inserted into the center hole 30. Further, the core plates 3 are laminated together for each block, with a plurality of core plates 3 as one block. The plurality of core plates 3 of each block are connected to each other by crimping (for example, dowel crimping), and the blocks are joined to each other by welding, for example. The rotor core 21 composed of a plurality of core plates 3 laminated in the laminating step is conveyed together with the pallet 4 to a position to be processed in which the inserting step and the fixing step are performed.

FIG. 5A is an explanatory diagram showing the first stage of the insertion step. FIG. 5B is a partially enlarged view of FIG. 5A. In the insertion step, the plurality of rod-shaped bodies 220 are inserted into each of the plurality of insertion holes 211 using the insertion jig 7. The pallet 4 and the rotor core 21 are conveyed by a roller conveyor 5 having a plurality of rollers 50, come into contact with a stopper (not shown), stop at a predetermined position, and are lifted upward by a lifter 6 having a plurality of support columns 61.

The support pillar 61 moves up and down so as to project upward from between two adjacent rollers 50, and its front end surface 61a comes into contact with the lower surface 41a of the base plate 41. The pallet 4 can move relative to the insertion jig 7 in the horizontal direction by sliding the lower surface 41a of the base plate 41 on the tip surface 61a of the support column 61. When the pallet 4 and the rotor core 21 are raised by the lifter 6, the upper end portion of the rotor core 21 is arranged in the recess 70 of the insertion jig 7.

The insertion jig 7 is fixed to the main body 71 by a main body 71, a frame 72 that supports and fixes the main body 71, a plurality of ball plungers 73 attached to the side surfaces of the main body 71, and a plurality of bolts 74 so as to face the rotor core 21. It has a plurality of holding plates 75, and a plurality of positioning pins 76 held by the plurality of holding plates 75, respectively. The recess 70 is formed by a circular through hole 720 that penetrates the frame 72 in the vertical direction. The main body 71 is arranged so as to close a part of the opening 720, and is fixed to the frame 72 by a plurality of bolts 77.

A plurality of guide holes 711 for temporarily holding the plurality of rod-shaped bodies 220 are formed in the main body 71. The rod-shaped body 220 arranged in the guide hole 711 is held by the plurality of ball plungers 73 so as not to fall. The ball plunger 73 includes a ball protruding into the guide hole 711, and the rotation of the ball allows the rod-shaped body 220 to move in the vertical direction, while the pressing of the ball suppresses the free fall of the rod-shaped body 220. The plurality of rod-shaped bodies 220 are accommodated in each of the plurality of guide holes 711 in advance before the upper end portion of the rotor core 21 is arranged in the recess 70 of the insertion jig 7.

As shown in an enlarged view in FIG. 5B, the plurality of alignment pins 76 engage with the flow hole 212 of the rotor core 21 to relatively align the insertion jig 7 and the rotor core 21. FIG. 6A shows a state in which the shaft portion 761 of the pair of pins 76 is inserted into the flow hole 212 formed by the plurality of long through holes 321. FIG. 6B shows the plurality of short through holes. It shows a state in which the shaft portion 761 of the pair of pins 76 is inserted into the flow hole 212 formed by 322. As shown in FIGS. 6A and 6B, each shaft portion 761 of the pair of pins 76 engages both ends of the flow hole 212 in the axial direction in the longitudinal direction. The plurality of pins 76 constitute the engaging portion of the present invention. Details of the shape of the pin 76 and the configuration of the holding plate 75 as a retaining member that holds and prevents the pin 76 from coming off will be described later.

FIG. 7 is an explanatory diagram showing a second stage of the insertion step. In this second stage, the insertion jig 7 and the rotor core 21 are relatively aligned by the engagement of the plurality of pins 76, and the plurality of rod-shaped bodies 220 are inserted into the guide holes of the insertion jig 7 by the pushing jig 8. It is extruded from 711 and inserted into the insertion hole 211 of the rotor core 21. The pushing jig 8 has a plurality of rods 81 corresponding to the plurality of rod-shaped bodies 220, and a movable plate 82 to which the upper ends of the plurality of rods 81 are fixed, and the movable plate 82 is a plurality of rods 81. Moves up and down with. A vacuum hole (not shown) for sucking the rod-shaped body 220 is opened on the tip surface of the rod 81 that abuts on the end surface of the rod-shaped body 220. Note that FIG. 7 shows only two rod-shaped bodies 220 and rod 81 out of the 20 rod-shaped bodies 220 and rod 81.

FIG. 8 is an explanatory diagram showing a fixing process. In the fixing step, the cal plate 91 is arranged on the rotor core 21, and the upper mold 92 is further arranged above the cal plate 91, and the resin 23 for fixing the rod-shaped body 220 in the insertion hole 211 (FIG. 2B). See) is injected into the insertion hole 211.

The upper mold 92 is formed with an insertion hole 920 into which a columnar resin base material 90 made of a thermosetting resin is inserted. The cal plate 91 is formed with a filling pot 910 for introducing the resin base material 90 into the insertion hole 211 of the rotor core 21. The cal plate 91 has a fitting hole 911 into which the positioning pin 47 is fitted, and is positioned by fitting the positioning pin 47 into the fitting hole 911.

The resin base material 90 is pressed by the plunger 93 and is introduced into the gap between the inner surface of the insertion hole 211 and the rod-shaped body 220 via the filling pot 910 while being melted by heat. Then, when the temperature drops, it solidifies into a solid resin 23, and the rod-shaped body 220 is fixed in the insertion hole 211. Cal, which is an unnecessary cured product of resin, remains in the filling pot 910. The remaining cal is removed from the rotor core 21 together with the cal plate 91.

After that, a strong magnetic field is applied to the rod-shaped body 220 in the magnetizing step, and when the rod-shaped body 220 is magnetized to become the magnet 22, the rotor 2 is completed. The rotor 2 is combined with the stator 1 to form a rotary electric machine 100.

Next, the configuration of the insertion jig 7 will be described in detail with reference to FIGS. 9 to 11. 9 (a) and 9 (b) are insertion jigs 7 shown in a side view and a top view, and a part of (a) shows a cross section taken along the line AA of (b). 10 (a) shows the lower surface of the insertion jig 7, FIG. 10 (b) is a sectional view taken along line BB of (a), and FIG. 10 (c) is a sectional view taken along line CC of (a). 11 (a), (b) and (c) are perspective views showing the holding plate 75 and the pair of pins 76.

As shown in FIG. 10 (c), the ball 731 of the ball plunger 73 protrudes into the guide hole 711. In the present embodiment, four ball plungers 73 are provided for one guide hole 711, and the balls 731 of each ball plunger 73 project from the inner surface 711a of the guide hole 711.

The pin 76 includes a columnar shaft portion 761 having a tapered tip, a disk-shaped flange portion 762 having a diameter larger than that of the shaft portion 761, and a columnar base portion 763 having a diameter smaller than that of the flange portion 762. Is integrally possessed. The flange portion 762 is arranged between the shaft portion 761 and the base portion 763, and the shaft portion 761, the flange portion 762, and the base portion 763 are arranged concentrically along the axial direction.

The holding plate 75 has a rectangular flat plate shape, and is formed by penetrating a pair of screw holes 751 into which bolts 77 are screwed and a pair of insertion holes 752 through which a shaft portion 761 of a pin 76 is inserted in the thickness direction. ing. The peripheral portion of the pair of insertion holes 752 is a contact portion 753 that abuts on the flange portion 762 and prevents the pin 76 from coming off. The inner diameter of the insertion hole 752 is formed to be larger than the outer diameter of the shaft portion 761.

The pin 76 is positioned with respect to the main body 71 by fitting the base 763 into the fitting hole 712 formed in the main body 71. A recessed portion 713 in which the holding plate 75 is housed is formed on the lower surface 71a of the main body 71. The holding plate 75 is fixed to the main body 71 by screwing a pair of bolts 74 inserted into the bolt insertion holes 714 formed in the main body 71 into the screw holes 751. The shaft portion 761 of the pin 76 is inserted into the insertion hole 752 of the holding plate 75 so that the tip portion on the side opposite to the flange portion 762 projects downward from the lower surface 71a of the main body 71.

The shaft portion 761 of the pin 76 has an outer peripheral surface 761a at the tip thereof formed in a tapered shape. In the insertion step, the rotor core 21 is aligned with the insertion jig 7 by abutting the inner edge of the flow hole 212 of the rotor core 21 on the tapered outer peripheral surface 761a of the shaft portion 761. That is, when the rotor core 21 is misaligned with respect to the insertion jig 7, the outer peripheral surface 761a of the tapered shaft portion 761 comes into contact with the inner edge of the flow hole 212, and a pair of the flow hole 212 is paired. The insertion jig 7 moves relative to the rotor core 21 so that the shaft portion 761 of the pin 76 is inserted (see FIGS. 6A and 6B), and the rotor core 21 is aligned with the insertion jig 7. To. Then, while maintaining the engaged state between the shaft portion 761 of the pin 76 and the flow hole 212, the plurality of rod-shaped bodies 220 are inserted into the insertion holes 211 of the rotor core 21 from the guide holes 711 of the insertion jig 7.

(Actions and effects of embodiments)
According to the embodiment described above, when the plurality of rod-shaped bodies 220 are inserted into the insertion holes 211 of the rotor core 21, the shaft portion 761 of the pin 76 is engaged with the plurality of flow holes 212 formed in the rotor core 21. As a result, the insertion jig 7 and the rotor core 21 are relatively positioned. Therefore, even if the size of the insertion hole 211 in the axial view is reduced to the same size as the size of the longitudinally orthogonal cross section of the rod-shaped body 220. , The rod-shaped body 220 can be inserted into the insertion hole 211.

Further, since the rotor core 21 is aligned with the insertion jig 7 by abutting the inner edge of the flow hole 212 of the rotor core 21 on the tapered outer peripheral surface 761a of the shaft portion 761, for example, a pallet for aligning the rotor core 21. It is possible to align the rotor core 21 and the insertion jig 7 with high accuracy without providing an actuator or the like for moving the 4.

Furthermore, since the pin 76 is positioned with respect to the main body 71 by fitting the base 763 into the fitting hole formed in the main body 71 and is prevented from coming off by the holding plate 75, for example, the pin 76 can be attached to the main body 71. The position accuracy of the pin 76 with respect to the main body 71 can be improved as compared with the case where the pin 76 is screwed into and fixed.

(Additional note)
Although the present invention has been described above based on the embodiment, the embodiment does not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

Further, the present invention can be carried out by appropriately modifying it by omitting a part of the configuration or adding or replacing the configuration within a range not deviating from the gist thereof. For example, in the above embodiment, the case where four holding plates 75 are attached to the insertion jig 7 and two pins 76 are held by each holding plate 75 has been described, but the number of the holding plates 75 and the pins 76 has been described. Is not limited to this, and if the insertion jig 7 has at least two pins 76, the rotor core 21 and the insertion jig 7 can be aligned with high accuracy.

2 ... Rotor (rotor) 211 ... Insertion hole 212 ... Flow hole 220 ... Rod-shaped body 3 ... Core plate 7 ... Insertion jig 76 ... Pin (engagement part) 761 ... Shaft part 761a ... Outer peripheral surface 762 ... Flange part

Claims (5)

A rotor core forming step of laminating a plurality of core plates made of a soft magnetic material to form a rotor core provided with a plurality of insertion holes extending in the stacking direction of the plurality of core plates and a plurality of flow holes for flowing a coolant. ,
It is provided with an insertion step of inserting a rod-shaped body made of a hard magnetic material into each of the plurality of insertion holes of the rotor core.
In the insertion step, an insertion jig provided with a plurality of guide holes and engaging portions that engage with the flow holes is used, and the insertion jig and the rotor core are relatively engaged with each other by engaging the engaging portions. This is a step of aligning and inserting each of the plurality of rod-shaped bodies into the plurality of insertion holes from the plurality of guide holes.
Manufacturing method of rotary electric rotor. The engaging portion comprises a plurality of pins having a shaft portion to be inserted into the flow hole.
The outer peripheral surface of the tip of the shaft is tapered.
In the insertion step, the rotor core is aligned with the insertion jig by abutting the inner edge of the flow hole on the tapered outer peripheral surface of the shaft portion.
The method for manufacturing a rotary electric rotor according to claim 1. A rotor core formed by stacking a plurality of core plates made of a soft magnetic material and having a plurality of insertion holes extending in the stacking direction of the plurality of core plates and a plurality of flow holes through which a coolant flows, and a hard magnetic material. A rotary electric rotor manufacturing apparatus comprising a plurality of rod-shaped bodies comprising the plurality of rod-shaped bodies, each of which is inserted into the plurality of insertion holes.
An insertion jig having a main body portion formed with a plurality of guide holes for temporarily holding the plurality of rod-shaped bodies and an engaging portion provided so as to project from the main body portion is provided.
When the plurality of rod-shaped bodies are inserted into the plurality of insertion holes, the insertion jig and the rotor core are relatively aligned by engaging the engaging portion with the distribution holes.
Rotating machine rotor manufacturing equipment. The engaging portion comprises a plurality of pins having a shaft portion to be inserted into the flow hole.
The outer peripheral surface of the tip of the shaft is tapered.
The rotor core is aligned with the insertion jig by bringing the tapered outer peripheral surface of the shaft portion into contact with the inner edge of the flow hole.
The rotary electric rotor manufacturing apparatus according to claim 3. The insertion jig has a retaining member that is fixed to the main body and prevents the pin from coming off.
The pin has a flange portion having a diameter larger than that of the shaft portion.
The retaining member is provided with a contact portion that comes into contact with the flange portion to prevent the pin from coming off, and an insertion hole through which the shaft portion is inserted.
The rotary electric rotor manufacturing apparatus according to claim 4.

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