JP5202566B2 - Rotor laminated iron core manufacturing apparatus and manufacturing method - Google Patents

Description

The present invention relates to an apparatus and a method for inserting a permanent magnet into a plurality of magnet insertion holes provided in an outer portion of a rotor laminated core, and further sealing and fixing the permanent magnet with a resin.

For example, in the magnet-embedded rotor described in Patent Document 1, it is disclosed that a permanent magnet inserted into a magnet insertion hole is fixed by enclosing a resin in the magnet insertion hole. In Patent Document 1, a resin injection hole is further provided at a radially inner position of each magnet insertion hole, and the magnet insertion hole and the resin injection hole are communicated with each other through a communication groove, and the rotor laminated core is After pressing from above and below with the upper mold and the lower mold, the resin was injected from the resin injection hole with a predetermined pressure, and the permanent magnet in the magnet insertion hole was fixed.

JP 2002-34187 A

However, in the technique described in Patent Document 1, a part of the caulking portion is rotated when the iron core pieces forming the rotor laminated iron core are caulked and laminated, particularly when the iron core piece is thin with a thickness of 0.5 mm or less. It protrudes in a small range from either the upper or lower surface of the child laminated core. When trying to close the magnet insertion hole while pressing it with the upper mold or the lower mold, the protruding caulking portion causes a minute gap between the pressing surface of the upper mold or the lower mold and the rotor laminated core. Therefore, it was necessary to crush by applying a very large load during pressing. However, by applying a load for crushing the protruding caulking portion, there are problems that the strength of the caulking portion becomes unstable and the equipment is enlarged.

This invention is made | formed in view of this situation, and it aims at providing the manufacturing apparatus and manufacturing method of a rotor lamination | stacking iron core which can carry out resin sealing of the permanent magnet to a reliable magnet insertion hole.

The rotor laminated core manufacturing apparatus according to the first invention that meets the above-described object is a permanent magnet that is inserted into a plurality of magnet insertion holes of a rotor laminated core in which a plurality of core pieces are caulked and laminated via caulking portions, An apparatus for manufacturing a rotor laminated iron core for injecting and fixing a thermosetting resin into the magnet insertion hole,
An upper plate member and a lower plate member that press and hold the rotor laminated core above and below the rotor laminated iron core to close the magnet insertion hole when resin is injected into the magnet insertion hole, The magnet insertion hole is provided with a resin pot for injecting the thermosetting resin through a runner, and the upper plate member is provided with a vent for letting the air in the magnet insertion hole to the outside when the resin is sealed.

The method for manufacturing a rotor laminated core according to the second aspect of the invention also includes thermosetting a permanent magnet that is inserted into a plurality of magnet insertion holes of a rotor laminated core in which a plurality of core pieces are caulked and laminated via caulking portions. A method for manufacturing a rotor laminated core in which a functional resin is injected and fixed into the magnet insertion hole,
An upper plate member and a lower plate member heated by a heating source are arranged above and below the rotor laminated core, respectively, and the thermosetting resin is injected into the magnet insertion hole through the runner into the lower plate member. A resin pot is provided, and the rotor laminated iron core is pressed and clamped between the upper plate member and the lower plate member, and then air in the magnet insertion hole is provided in the upper plate member when resin is sealed from the resin pot . Escape from the vent to the outside.

In the rotor laminated core manufacturing apparatus according to claim 1 and the rotor laminated core manufacturing method according to claim 2, the upper plate member has a vent for letting the air in the magnet insertion hole to the outside when encapsulating the resin. Since it is provided, it is possible to securely fix the permanent magnet to the magnet insertion hole without requiring extra resin.

It is a partially cutaway front view of the manufacturing apparatus of the rotor lamination | stacking iron core which concerns on one embodiment of this invention. It is a top view of a rotor lamination | stacking iron core. It is a detailed front view of the manufacturing apparatus of the same rotor lamination | stacking iron core corresponding to the AA 'arrow in FIG.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

As shown in FIG. 1 to FIG. 3, the rotor laminated core manufacturing apparatus 10 according to one embodiment of the present invention is fixed at the upper and lower ends of four vertically arranged guide posts 11. Arranged between the base 12 and the lower fixed base 13, and the upper fixed base 12 and the lower fixed base 13, and fixed to the elevator base 14 that moves up and down along the guide post 11, and the upper fixed base 12 and the lift base 14, respectively. An upper plate member 15 and a lower plate member 16 are provided.
The upper plate member 15 includes a backing plate 17, an upper mold plate 18 and an upper pressing plate 19, and the lower plate member 16 is a lower mold plate 20 mounted on the lifting platform 14 and a lower pressing plate mounted thereon. 21. At the center of the lower pressing plate 21, there is a guide core 24 attached to a shaft hole 23 formed at the center of the rotor laminated core 22. In this embodiment, the lower pressing plate 21 and the guide core 24 form a tray that conveys the rotor laminated core 22 in a mounted state.

A hydraulic cylinder 25, which is an example of an elevating means, is provided on the upper portion of the lower fixed base 13, and the upper elevating base 14 moves up and down along the guide posts 11 by the hydraulic cylinder 25. Note that an air cylinder, a jack mechanism using a combination of a female screw and a male screw, an electric cylinder, a toggle mechanism, and the like can also be used as the lifting means.
An opening 28 is provided in the center of the backing plate 17, and the upper mold plate 18 and the upper pressing plate 19 corresponding to the opening 28 are in a state in which a plurality (8 in this embodiment) of resin pots (cylinders) 29 pass therethrough. It is formed with. As shown in FIG. 2, the resin pot 29 is located inside the eight magnet insertion holes 30 formed in the outer peripheral portion of the rotor laminated core 22 in plan view. Plungers 32 for pushing out the resin in the respective resin pots 29 are fixed to a common base 33, and the common base 33 is moved up and down by a hydraulic cylinder 34 fixed to the upper fixing base 12, and the resin put into the resin pot 29 is bottomed. It is trying to discharge from. The upper mold plate 18 is provided with an electric heater (not shown) which is an example of a first heat source (heating source), and heats the resin pot 29 to a temperature around 170 ° C.

As shown in FIG. 2 (only showing a planar position) and FIG. 3, a resin groove (runner) 35 serving as a resin passage between the resin discharge port of the resin pot 29 and the magnet insertion hole 30 is provided at the bottom of the resin pot 29. Is formed. The resin groove 35 is formed in the upper pressing plate 19 (that is, the bottom portion of the upper plate member 15) that contacts the rotor laminated core 22. On the other hand, a lower pressing plate 21 constituting the lower plate member 16 is disposed at the bottom of the rotor laminated iron core 22 to prevent resin leakage from the magnet insertion hole 30. The lower pressing plate 21 is provided with a vent (not shown) that allows air from the magnet insertion hole 30 to escape when the resin is sealed. The vent is formed of a groove having a depth of about 0.03 mm, which allows air to escape but does not allow resin to pass therethrough. The vent can be formed on the upper pressing plate 19. The lower mold plate 20 constituting the lower plate member 16 is provided with an electric heater as an example of a second heat source (heating source) to heat the lower mold plate 20 to about 170 ° C. Accordingly, the resin discharged from the resin pot 29 passes through the resin groove 35, enters the magnet insertion hole 30, covers the periphery of the permanent magnet 37 disposed inside, and each permanent magnet 37 is placed in the magnet insertion hole 30. Secure to.

The rotor laminated iron core 22 is formed by caulking and laminating a plurality of iron core pieces 39 formed by a plurality of press workings. When the iron core pieces 39 are formed, a caulking portion (in this embodiment, a V-shaped caulking) is used. 40 and 41 are formed. In the rotor laminated core 22 shown in FIG. 3, the uppermost iron core piece 39a is formed with a hole 42 through which the caulking portions 40, 41 of the lower iron core piece 39 project, respectively. The caulking portions 40 and 41 (in detail, caulking protrusions) of the lower iron core piece 39 protrude in a slight range from 42.

When the lower surface of the upper pressing plate 19 that is a part of the upper plate member 15 that presses the upper surface of the rotor laminated iron core 22 is a perfect plane, the caulking portions 40 and 41 protruding from the iron core piece 39a are pressed. In the bottom surface of the upper pressing plate 19, escape spaces 43 and 44 are formed at positions where the caulking portions 40 and 41 protrude so that the upper pressing plate 19 does not press the protruding caulking portions 40 and 41. This escape space is formed in the lower pressing plate 21 when the caulking portion of the rotor laminated core 22 protrudes from the lower surface of the rotor laminated core 22. Accordingly, the upper plate member 15 (specifically, the upper pressing plate 19) and the lower plate member 16 (specifically, the lower pressing plate 21) can be brought into close contact with the upper surface and the lower surface of the rotor laminated core 22, The upper plate member 15 and the lower plate member 16 can be reliably closed in the magnet insertion hole 30 formed in the rotor laminated iron core 22 to prevent resin leakage, and further, the caulking direction of the protruding caulking portions 40 and 41 can be Since no reverse load is applied, the caulking strength of the rotor laminated core 22 can be maintained.

Then, operation | movement of this manufacturing apparatus 10 of a laminated iron core and its effect | action are demonstrated.
In a state where the upper plate member 15 and the lower plate member 16 are respectively heated by an electric heater, the hydraulic cylinder 25 is operated to lower the elevator 14 and the hydraulic cylinder 34 is operated to raise the plunger 32. The rotor laminated core 22 mounted on the lower pressing plate 21 is disposed at a predetermined position (for example, via a positioning pin) of the lower mold plate 20. Here, it is preferable that the rotor laminated core 22 is preheated in the vicinity of 150 to 170 ° C. in advance. The lower pressing plate 21 and the guide core 24 constitute a transfer tray for the rotor laminated core 22.

Next, the hydraulic cylinder 25 is raised, the lower plate member 16 is pushed up, and the rotor laminated core 22 is pressed and clamped between the upper plate member 15 and the lower plate member 16. At this time, the caulking portions 40 and 41 protruding from the surface of the rotor laminated iron core 22 completely enter into the escape spaces 43 and 44 formed in the upper plate member 15, and the upper pressing plate 19 of the upper plate member 15 is moved to the rotor. It adheres to the upper surface of the laminated iron core 22. And, in a state where the rotor laminated iron core 22 is clamped by the upper pressing plate 19, a tablet of a predetermined thermosetting resin is put in each resin pot 29. Is dissolved. Next, the hydraulic cylinder 34 is lowered, the plunger 32 is pushed down, and the resin in the resin pot 29 is injected into the magnet insertion hole 30 through the resin groove 35. It should be noted that either the resin pot 29 or the plunger 32 may be provided with a vent (not shown) for releasing the air accumulated in the resin pot 29 when the plunger 32 is lowered.
As a result, the resin is sealed in the magnet insertion hole 30 and the permanent magnet 37 disposed inside is fixed. Although not shown, the permanent magnet 37 has a plurality of protrusions around it so as to be fixed at a predetermined position in the magnet insertion hole 30.

In the embodiment described above, the planar positions of the magnet insertion hole 30 and the resin pot 29 are completely different from each other and are connected by the resin groove 35. However, a part of the resin pot is part of the magnet insertion hole. It is also possible to omit the resin groove.
In the above-described embodiment, the resin pot 29 is disposed on the upper plate member 15. However, the resin pot 29 may be disposed on the lower plate member 16, or the rotor laminated core 22 may be turned upside down with the tray.
In the above embodiment, a thermosetting resin is used as the sealing resin, but a thermoplastic resin may be used.
Further, a cull (resin reservoir) for connecting a part or all of each resin pot 29 or each resin groove 35 may be provided.
Furthermore, the present invention is not limited by the shape of the escape spaces 43 and 44 as long as the caulking portion protruding from the surface of the rotor laminated core 22 can be fitted.

10: Manufacturing apparatus for rotor laminated core, 11: Guide post, 12: Upper fixing base, 13: Lower fixing base, 14: Lifting base, 15: Upper plate member, 16: Lower plate member, 17: Backing plate, 18 : Upper mold plate, 19: upper pressing plate, 20: lower mold plate, 21: lower pressing plate, 22: rotor laminated core, 23: shaft hole, 24: guide core, 25: hydraulic cylinder, 28: opening, 29: Resin pot, 30: Magnet insertion hole, 32: Plunger, 33: Common base, 34: Hydraulic cylinder, 35: Resin groove, 37: Permanent magnet, 39, 39a: Iron core piece, 40, 41: Caulking part, 42 : Hole, 43, 44: Escape space

Claims (2)

Rotor laminated iron core in which a permanent magnet to be inserted into a plurality of magnet insertion holes of a rotor laminated iron core in which a plurality of iron core pieces are caulked and laminated via caulking portions is fixed by injecting thermosetting resin into the magnet insertion hole. Manufacturing equipment,
An upper plate member and a lower plate member that press and hold the rotor laminated core above and below the rotor laminated iron core to close the magnet insertion hole when resin is injected into the magnet insertion hole, A resin pot for injecting the thermosetting resin into the magnet insertion hole via a runner is provided, and the upper plate member is provided with a vent for escaping the air in the magnet insertion hole to the outside when the resin is sealed. An apparatus for manufacturing a rotor laminated iron core characterized by Rotor laminated iron core in which a permanent magnet to be inserted into a plurality of magnet insertion holes of a rotor laminated iron core in which a plurality of iron core pieces are caulked and laminated via caulking portions is fixed by injecting thermosetting resin into the magnet insertion hole. A manufacturing method of
An upper plate member and a lower plate member heated by a heating source are arranged above and below the rotor laminated core, respectively, and the thermosetting resin is injected into the magnet insertion hole through the runner into the lower plate member. A resin pot is provided, and the rotor laminated iron core is pressed and clamped between the upper plate member and the lower plate member, and then air in the magnet insertion hole is provided in the upper plate member when resin is sealed from the resin pot . A method for manufacturing a rotor laminated core, wherein the rotor core is escaped to the outside.

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