JP2011066987A - Method of manufacturing laminated core, laminated core, and rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing laminated cores that is excellent in dimensional accuracy and does not deteriorate performance. <P>SOLUTION: The method of manufacturing a laminated core 1 formed by laminating multiple metal plates 10 includes the steps of: laminating metal plates 10 molded in a predetermined shape while a gap S is formed at ends thereof and they are in tight contact in the areas other then the ends; and injecting adhesive only into the gaps S to bond the laminated metal plates 10 together. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method for producing a laminated core, a laminated core produced by the production method, and a rotating electrical machine using the laminated core as a stator core.

  In recent years, rotating electric machines used as electric motors and generators have been developed. This rotary electric machine has a configuration in which a stator winding is assembled to a stator core to form a stator, and a rotor facing the stator is provided. A laminated core formed by laminating a plurality of metal plates in the thickness direction is used for the stator core.

  Moreover, the laminated core which laminated | stacked the metal plate is utilized not only for the stator core of a rotary electric machine but for the apparatus provided with stator windings (coils) such as a reactor and a core of a transformer.

  A conventional laminated core is manufactured by laminating metal plates such as magnetic steel plates formed in a predetermined shape, and fixing each metal plate by bonding, caulking, welding, or the like.

  In addition, when fixing a metal plate by caulking, welding, etc., it is necessary to apply a large force in the direction in which the metal plates are laminated at the time of fixing, and the position of the metal plates laminated when this stress is applied. There was a problem of slipping. When the metal plate is deviated, the dimensional accuracy of the laminated core to be manufactured varies, and the magnetic properties of the laminated core are deteriorated.

  Further, when the metal plate is fixed by caulking, welding or the like, the characteristics of the metal plate at the processing position are changed. Specifically, in the case of caulking, the metal plate is compressed and deformed, and the magnetic characteristics are partially lowered. In the case of welding, a magnetic path is formed in a welded portion where at least two metal plates are welded. The As described above, the magnetic properties of the laminated core are deteriorated.

  For this reason, as a manufacturing method which does not give a big stress to a metal plate at the time of processing, fixing each metal plate with an adhesive agent is examined. For example, Patent Documents 1 to 4 describe that a laminated core is manufactured by applying or impregnating an adhesive between metal plates constituting the laminated core and performing a curing process.

  However, in the conventional laminated core, an adhesive is applied (impregnated) between the laminated metal plates, and due to the variation in the thickness of the adhesive layer, the laminated thickness and occupancy of the metal plate vary. There is a problem in that the magnetic properties of the product and the performance quality of the final product using the laminated core are affected. Furthermore, due to the variation in the film thickness of the adhesive layer, there is a problem that the smoothness of the end face on which the metal plates are laminated is lowered and the shape accuracy of the laminated core is lowered.

Japanese Patent Laid-Open No. 2005-19640 JP 2005-19641 A JP 2005-19642 A Japanese Patent Application Laid-Open No. 2003-264962

  This invention is made | formed in view of the said actual condition, and makes it a subject to provide the manufacturing method of the laminated core which is excellent in dimensional accuracy and does not cause a performance fall. It is another object of the present invention to provide a laminated core and a rotating electrical machine manufactured by the manufacturing method of the laminated core.

  In order to solve the above-mentioned problems, the present inventors have focused on the fact that the adhesive that bonds the metal plate in the laminated core causes a decrease in the dimensional accuracy of the laminated core, and as a result of repeated studies, the present inventors have made the present invention. It was.

  The manufacturing method of the laminated core of the present invention according to claim 1 is a manufacturing method of manufacturing a laminated core formed by laminating a plurality of metal plates, and a metal plate formed in a predetermined shape is provided at an end portion. It has a step of forming a gap and laminating in a state of being in close contact except at the end, and a step of injecting an adhesive into the gap and injecting the laminated metal plate without injecting other than the gap. .

  The method for producing a laminated core of the present invention is a production method for producing a laminated core formed by laminating a plurality of metal plates, and only the ends are bonded with an adhesive injected only into the ends. And since the adhesive is not inject | poured into parts other than an edge part, it is closely_contact | adhered with the metal plate adjacent in the lamination direction, and the adhesive is no longer inject | poured. As a result, in the laminated core manufactured by the manufacturing method of the present invention, occurrence of problems such as a decrease in dimensional accuracy due to the presence of an adhesive between metal plates is suppressed. Thus, according to the manufacturing method of this invention of Claim 1, the laminated core which is excellent in dimensional accuracy and does not cause a performance fall can be manufactured.

  According to a second aspect of the present invention, there is provided the method for manufacturing a laminated core according to the first aspect, wherein the step of adhering the metal plates is performed by injecting an adhesive in a state where the laminated metal plates are pressed in the lamination direction. It is characterized by that.

  According to the manufacturing method of Claim 2, since the adhesive agent is injected in a state where the stacked metal plates are pressed in the stacking direction, the stacked metal plates are more closely adhered to each other than the end portions. As a result, it is possible to further suppress the adhesive from flowing into the interface between the laminated metal plates.

  According to a third aspect of the present invention, there is provided the method for manufacturing a laminated core according to any one of the first and second aspects, wherein the step of adhering the metal plate is to apply an adhesive to the side surface of the laminated metal plate. Features.

  According to the third aspect, the end portion of the metal plate in which the gap is formed is located on the side surface of the stacked metal plate (the side surface of the stacked body) when the plurality of metal plates are stacked. And the clearance gap in which an adhesive agent is inject | poured opens in this side surface. For this reason, an adhesive agent can be inject | poured into the clearance gap between metal plates by apply | coating an adhesive agent to the side surface of the laminated metal plate.

  The method for producing a laminated core according to a fourth aspect of the present invention is the method according to any one of the first to third aspects, wherein the predetermined shape is a shape of the laminated core or a shape that can form the laminated core when combined. It is characterized by.

  According to the fourth aspect of the present invention, the laminated metal plate has a shape of a laminated core or a shape that can form a laminated core when combined. Thereby, a laminated core can be formed when combined with a laminated core or in a state of being bonded with an adhesive.

  The method for producing a laminated core according to a fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the metal plate is formed by stamping.

  According to the fifth aspect, by forming the metal plate by punching, the end portion of the metal plate becomes thin, and a gap can be formed between the metal plates when laminated.

  The method for manufacturing a laminated core according to a sixth aspect of the present invention is characterized in that, in any one of the first to fifth aspects, the laminated metal plates are aligned using an alignment frame in a laminated state.

  According to the sixth aspect, after the laminated metal plates are aligned by the alignment frame, the adhesive is injected into the gap. For this reason, each metal plate is adhere | attached in the state holding high dimensional accuracy. That is, a laminated core having high dimensional accuracy can be manufactured. The alignment frame refers to a member for aligning the metal plates based on the outer peripheral shape of the metal plates, and may be a mold as well as a frame.

The method for producing a laminated core according to a seventh aspect of the present invention is the method according to any one of the first to sixth aspects,
The laminated metal plates are characterized in that the number of sheets that can form a plurality of laminated cores is laminated.

  According to claim 7, the laminated metal plate is in a state in which a large number of laminated cores are laminated. And in this state, many lamination | stacking cores can be manufactured by adhere | attaching only the metal plate to adhere | attach. In particular, a large number of laminated cores can be continuously produced by continuously injecting an adhesive into the laminated metal plates.

  The method for producing a laminated core according to an eighth aspect of the present invention is the method according to any one of the first to seventh aspects, wherein the metal plate in a state where the adhesive is injected is bonded with a heated gas sprayed thereon. It is characterized by.

  According to the eighth aspect of the present invention, since the adhesive is injected only into the gap at the end portion, the adhesive injected into the gap at the end portion can be cured by blowing heated gas. That is, when the adhesive is impregnated into the interface of the conventional metal plate, an apparatus such as a curing furnace is required, but in the present application, the adhesive is cured with a simple apparatus in which heated gas is blown. be able to.

  A laminated core according to a ninth aspect of the present invention is manufactured by the method for producing a laminated core according to any one of the first to eighth aspects.

  According to the ninth aspect, since the laminated core of the present invention is manufactured by the above manufacturing method, as described above, the laminated core is excellent in dimensional accuracy and does not cause deterioration in performance.

  A laminated core according to a tenth aspect of the present invention is the stator core of the rotating electric machine according to the ninth aspect.

  The laminated core of the present invention is a core capable of exhibiting the above-described effects, and is preferably a core to which a stator winding is assembled, and more preferably used for a stator core of a rotating electrical machine.

  A rotating electric machine according to an eleventh aspect of the present invention includes a stator having the stator core according to claim 10 and a stator winding assembled to the stator core, and an inner peripheral side of the stator or And a rotor having magnetic poles alternately formed in the circumferential direction on the outer peripheral side.

  As described above, since the stator core is a laminated core that has excellent dimensional accuracy and does not cause a decrease in performance, the rotating electrical machine of the present invention is a rotating electrical machine in which a decrease in performance is suppressed.

It is the figure which showed the outer periphery shape of the metal plate of 1st embodiment. It is the figure which showed the cross-sectional shape of the edge part of the metal plate of 1st embodiment. It is the figure which showed the cross section of the edge part of the state which the metal plate laminated | stacked in 1st embodiment. It is the figure which showed the cross section of the edge part of the state by which the adhesive agent was apply | coated to the metal plate laminated | stacked in 1st embodiment. It is the figure which showed the cross section of the edge part of the state from which the excess adhesive agent was removed from the metal plate laminated | stacked in 1st embodiment. It is the figure which showed the structure of the rotary electric machine of 1st embodiment. It is the figure which showed the stator of the rotary electric machine of 1st embodiment. It is the figure which showed the structure of the stator core of the rotary electric machine of 1st embodiment. It is sectional drawing which shows the structure of each phase coil | winding which comprises the stator winding | coil of the rotary electric machine of 1st embodiment. It is the figure which showed the connection of the stator winding | coil of the rotary electric machine of 1st embodiment. It is the figure which showed the winding integration body of the rotary electric machine of 1st embodiment. It is the figure which showed the wound body which wound the winding integration body of the rotary electric machine of 1st embodiment. It is the figure which showed the assembly | attachment body assembled | attached to the stator core of the stator winding | coil of the rotary electric machine of 1st embodiment. It is the figure which showed the outer cylinder of the rotary electric machine of 1st embodiment. It is the figure which showed the structure of the manufacturing apparatus of 2nd embodiment. It is the figure which showed the split core of the rotary electric machine of a deformation | transformation form. It is the figure which showed the split core of the rotary electric machine of a deformation | transformation form.

  Hereinafter, as an embodiment, a laminated core (divided core) and a rotating electrical machine using the laminated core will be manufactured to specifically describe the present invention.

(First embodiment)
(Manufacture of split cores)
First, a thin metal plate is punched to form a metal plate 10 having a shape including the teeth portion 11 and the core back portion 12 as shown in FIG. The metal plate 10 has a shape of a split core 1 in which the stator core 30 of the rotating electrical machine 2 is divided into a plurality of parts in the circumferential direction.

  The punching of the metal thin plate is not particularly limited, and can be performed by using a press similarly to those used in the conventional split core (laminated core). As shown in FIG. 2, the metal plate 10 has a substantially tapered cross section (sagging, fractured surface) on both sides of the end portion due to a shearing force applied during punching. That is, the thickness of the end of the metal plate 10 is gradually reduced on both sides. Moreover, the change of the thickness of the edge part of the metal plate 10 is large on the side where the metal plate 10 is broken from the metal thin plate during the punching process.

  Moreover, the material and thickness of a metal thin plate should just be a material and thickness which can obtain the characteristic calculated | required by the division | segmentation core 1 manufactured, for example, using a 0.3 mm-thick silicon steel plate and an electromagnetic steel plate. it can.

  Next, a predetermined number of metal plates 10 are stacked in the same direction. As shown in FIG. 3, a gap S is formed at a position corresponding to the end of the metal plate 10 between two adjacent metal plates 10 among the stacked metal plates 10. Here, in the state where the plurality of metal plates 10 are stacked, the gap between the stacked metal plates 10 is open to the side surface of the stacked body. In addition, two adjacent metal plates 10 are in contact with each other at portions other than the end portions of the metal plate 10.

  Then, the stacked metal plates 10 are aligned. The alignment of the metal plate 10 was performed by passing it through an alignment frame having a shape substantially coinciding with the outer peripheral shape of the metal plate 10 (the outer peripheral shape of the split core). Thereby, the respective positions of the laminated metal plates 10 coincide in the thickness direction (lamination direction), and the side surface of the laminate formed by the end faces of the metal plates 10 is substantially flat (lamination). Dimensional accuracy of the body has been increased).

  Thereafter, the laminated body is pressurized in the laminating direction, and the metal plates 10 in a laminated state are pressed together. The pressurizing force at this time may be a force that can press the laminated metal plates 10 together without any gaps.

  Subsequently, an adhesive is applied to the entire side surface of the laminate. By applying the adhesive to the side surface of the laminated body, as shown in FIG. 4, the adhesive is injected into the gap S opened on the side surface of the laminated body. At this time, the laminated body is maintained in a pressurized state, and the adhesive does not flow into a portion other than the gap S at the end of the metal plate 10 (interface of the metal plate 10).

  As the adhesive injected into the gap S of the metal plate 10, the adhesive used in the conventional laminated core can be used. For example, the thermosetting resin which consists of acrylic resin and an epoxy resin can be mention | raise | lifted.

  Then, as shown in FIG. 5, excess adhesive is removed from the laminate on which the adhesive is applied, and hot air (heated air) is blown to cure the applied adhesive.

  The method for removing the excess adhesive is not particularly limited, and the excess adhesive is scraped off by passing through a frame that substantially matches the outer peripheral shape of the split core, as in the case of the alignment frame described above. Can be done.

  The hot air blown to cure the adhesive is not particularly limited as long as the temperature and composition can cure the adhesive, and it is preferable to use heated air as in this embodiment. .

  The split core 1 of this embodiment was manufactured by the above.

  In the split core 1 of this embodiment, a plurality of metal plates 10 are bonded by injecting an adhesive only into the gap S at the end. And the metal plates 10 adjacent to each other in the stacking direction are in close contact with each other except for the end portions. That is, in the split core 1 of this embodiment, no adhesive is interposed between the stacked metal plates 10. As a result, in the split core 1 of the present embodiment, a decrease in the space factor of the core caused by the thickness of the adhesive layer between the laminated metal plates 10 is suppressed.

  Furthermore, the split core 1 of this embodiment maintains the magnetic properties of the metal plate 10 by bonding the laminated metal plates 10 with an adhesive, and obtains desired magnetic properties as a split core (laminated core). On the other hand, in the split core in which the metal plates are joined by caulking or welding, a magnetic path is formed in the caulking portion or the welding portion where the metal plates are joined. That is, in the split core 1 of the present embodiment, a decrease in magnetic characteristics is suppressed.

  In addition, the split core 1 of the present embodiment is bonded with an adhesive in a state where the stacked metal plates 10 are aligned with an alignment frame. That is, the metal plate 10 is bonded with an adhesive while maintaining high dimensional accuracy, and the divided core 1 is provided with high dimensional accuracy. On the other hand, in the split core in which the metal plates are joined by caulking, welding, or the like, the metal plate is displaced or opened during processing for joining the metal plates, and the dimensional accuracy is lowered. That is, since the split core 1 of the present embodiment has high dimensional accuracy, a decrease in magnetic characteristics due to a decrease in dimensional accuracy was suppressed.

  Furthermore, the split core 1 of the present embodiment is cured by blowing hot air to the adhesive injected into the gap S, and the adhesive can be cured with a simple device. On the other hand, when an adhesive is impregnated into the interface of a conventional metal plate, an apparatus such as a curing furnace is required, which causes an increase in cost. That is, the split core 1 of this embodiment could be manufactured at low cost.

(Rotating electric machine)
The configuration of the rotating electrical machine of this embodiment is shown in FIG. The rotating electrical machine 2 according to the present embodiment includes a housing 20 in which a pair of substantially bottomed cylindrical housing members 200 and 201 are joined to each other through openings, and is rotatably supported by the housing 20 via bearings 210 and 211. The rotor 4 is fixed to the rotary shaft 40 and the stator 3 is fixed to the housing 20 at a position surrounding the rotor 4 inside the housing 20.

  The rotor 4 is formed with a plurality of magnetic poles that are alternately different in the circumferential direction by permanent magnets on the outer peripheral side facing the inner peripheral side of the stator 3. The number of magnetic poles of the rotor 4 is not limited because it varies depending on the rotating electric machine. In this embodiment, an 8-pole rotor (N pole: 4, S pole: 4) is used.

  As shown in FIG. 7, the stator 3 includes a stator core 30, a three-phase stator winding 5 formed from a plurality of phase windings, and an outer cylinder that is extrapolated to the stator core 30. 6.

  As shown in FIG. 8, the stator core 30 has an annular shape in which a plurality of slots 31 are formed on the inner periphery. The plurality of slots 31 are formed such that the depth direction thereof coincides with the radial direction. The number of slots 31 formed in the stator core 30 is formed at a ratio of two per one phase of the stator winding 5 with respect to the number of magnetic poles of the rotor 4. That is, 8 × 3 × 2 = 48 slots 31 are formed.

  The stator core 30 is formed by arranging 24 divided cores 1 in the circumferential direction. The divided core 1 defines one slot 31 and also defines one slot 31 between the adjacent divided cores 1 in the circumferential direction (the teeth portion 11 extending radially inward and the teeth portion 11 include The core back portion 12) is formed.

  The stator winding 5 is formed by winding a plurality of windings 50 by a predetermined winding method. As shown in FIG. 9A, the winding 50 constituting the stator winding 5 is made of a copper conductor 51 and an insulating film comprising an outer layer 521 and an inner layer 520 that covers the outer periphery of the conductor 51 and insulates the conductor 51. 52. The thickness of the insulating film 52 including the inner layer 520 and the outer layer 521 is set between 100 μm and 200 μm. As described above, since the insulating film 52 composed of the inner layer 520 and the outer layer 521 is thick, it is not necessary to insulate the windings 50 with insulating paper or the like between them. Insulating paper may be disposed between the stator cores 30 to insulate the wires from each other.

  The outer layer 521 is formed of an insulating material such as nylon, and the inner layer 520 is formed of an insulating material such as a thermoplastic resin or a polyamideimide having a glass transition temperature higher than that of the outer layer. As a result, the outer layer 521 is softened faster than the inner layer 520 due to heat generated in the rotating electrical machine, so that the windings 50 installed in the same slot 31 are thermally bonded to each other. As a result, the plurality of windings 50 installed in the same slot 31 are integrated to make the windings 50 rigid, so that the mechanical strength of the wire winding 50 in the slot 31 is improved. In addition, even if excessive vibration occurs, the bonded portion between the inner layer 520 and the outer layer 521 is peeled off before the bonded portion between the inner layer 520 and the conductor 51. Therefore, the adhesion between the inner layer 520 and the conductor 51 is maintained and insulation is maintained. It can be secured.

  Further, as shown in FIG. 9B, the winding 50 of the stator winding 5 is formed by covering the outer periphery of the insulating film 52 made of the inner layer 520 and the outer layer 521 with a fusion material 53 made of epoxy resin or the like. Also good. As a result, the fusion material 53 is melted faster than the insulating film 52 by the heat generated in the rotating electrical machine, so that the plurality of windings 50 installed in the same slot 31 are thermally bonded by the fusion material 53. As a result, the plurality of windings 50 installed in the same slot 31 are integrated to make the windings 50 rigid, so that the mechanical strength of the winding 50 in the slot 31 is improved.

  A film made of polyphenylene sulfide (PPS) may be used for the insulating film 52 of the winding 50 constituting the stator winding 5.

  As shown in FIG. 10, the stator winding 5 is formed of two three-phase windings (U1, U2, V1, V2, W1, W2).

  The stator winding 5 is a cylinder formed by winding a winding assembly 56 (FIG. 11) formed in a strip shape by stacking twelve windings 50 formed in a predetermined waveform shape in a predetermined state. (FIG. 12). In this embodiment, the winding integrated body 56 is wound six times.

  The stator winding 5 includes a linear slot accommodating portion 54 that is accommodated in a slot 31 formed in the stator core 30 and a turn portion 55 that connects adjacent slot accommodating portions 54 to each other. . The slot accommodating portions 54 are accommodated in the slots 31 for each predetermined number of slots (3 phases × 2 = 6 in the present embodiment). The turn portion 55 is formed so as to protrude from the axial end surface of the stator core 30.

  The stator winding 5 is formed by winding a plurality of windings 50 in a wavy shape along the circumferential direction with one end protruding from the axial end surface of the stator core 30. . The winding 50 of the stator winding 5 is wound from the radially outer side toward the radially inner side. The end portion of the winding 50 protrudes from the end surface of the stator winding 5 on the innermost peripheral surface side.

  In addition, the winding method of the winding 50 of the stator winding 5 is not particularly limited, and one phase of the stator winding 5 is wavy along the circumferential direction and wound in different winding directions. It is good also as a structure connected by the folding | turning part which the winding direction reverses two mounted | worn windings.

  FIG. 13 is a perspective view showing an assembly 33 in which the stator winding 5 and the stator core 30 are assembled. FIG. 14 is a perspective view of the outer cylinder 6 that shrinks on the outer periphery of the assembly 33.

  On the outer periphery of the assembly 33, the core back portion 12 of the split core 1 stacked in the axial direction appears. The outer cylinder 6 has a cylindrical shape with a thickness of 2 mm, for example, and is formed of low carbon steel through which magnetic flux can pass. In addition, the outer cylinder 6 is provided with a through hole 6 a that is used when the stator 3 is fixed to the housing 20.

  The assembly 3 is fitted into the outer cylinder 6 by shrinking. In the insertion by shrinkage, the outer cylinder 6 is first heated to a predetermined temperature (for example, 300 ° C.) by a heater (not shown). By this heating, the outer cylinder 6 is expanded in diameter. Subsequently, the assembly 33 is inserted into the heated outer cylinder 6. When the insertion is completed, the outer cylinder 6 is reduced in diameter by cooling with a blower (not shown) for about 30 minutes. This completes the shrinkage.

(Second embodiment)
In the first embodiment, the split cores 1 are manufactured one by one. In the present embodiment, the split cores 1 are continuously manufactured by using the manufacturing apparatus 7 having the configuration shown in FIG.

(Manufacturing equipment)
As shown in FIG. 15, the manufacturing apparatus 7 includes a forming die 71 having a passage 70 through which the stacked metal plates 10 pass, and along the passage 70 passing through the forming die 71, An adhesive application head 72 and a blower head 73 for blowing hot air are integrally arranged in order. The adhesive application head 72 and the blowing head 73 that blows hot air are provided by the molding die 72 in a state where the processing positions are independent. In addition, the manufacturing apparatus 7 includes a compression device (not shown) that applies a compressive force for compressing in the stacking direction when the stacked metal plates 10 pass through the passage 70.

  The passage 70 is a hollow passage having an inlet and an outlet opened on the outer peripheral surface of the mold 71 and penetrating the mold 71. The passage 70 has a cross-sectional shape (inner peripheral shape) substantially matching the outer peripheral shape of the metal plate 10 (outer peripheral shape of the split core 1). The passage 70 advances so that the lamination direction of the laminated metal plates 10 coincides with the direction in which the passage 70 extends. The passage 70 functions in the same manner as the alignment frame of the first embodiment.

  The coating head 72 applies an adhesive to the outer peripheral surface (side surface) of the laminated metal plate 10 that passes through the passage 70. The application head 72 is not particularly limited as long as it is an apparatus that can apply an adhesive to the side surfaces of the laminated metal plates 10, and a roller for applying the adhesive as shown in FIG. 15. In addition, a device such as a device having a spray port for spraying an adhesive can be obtained. The application head 72 selectively applies an adhesive to a predetermined position of the stacked metal plates 10 that pass through the passage.

  The blower head 73 is a device that blows hot air onto the laminated metal plate 10 having an outer peripheral surface coated with an adhesive by the coating head 72 to cure the adhesive. The blower head is not particularly limited as long as it is a device capable of blowing hot air. Further, the composition and temperature of the gas to be sprayed are not particularly limited.

  A passage 70 is formed between the coating head 72 and the blower head 73 by the molding die 71. The laminated metal plate 10 whose adhesive is applied to the outer peripheral surface by the application head 72 passes through this passage 70, and the excessively applied adhesive is scraped off. Further, the passage 70 prevents hot air from the blower head 73 from hitting the coating head 72 and the processing position, and the adhesive does not harden in the vicinity of the coating head 72.

  The split core 1 made of the laminated metal plate 10 with the cured adhesive is discharged from an outlet opened on the outer peripheral surface of the mold 71.

(Manufacture of split cores)
Manufacturing of the split core 1 using the manufacturing apparatus 7 shown in the drawing will be described below.

  First, in the same manner as in the first embodiment, a thin metal plate is punched to form a metal plate 10 having a tooth portion 11 and a core back portion 12 and laminated in the same direction. And it pressurizes in the lamination direction and crimps | bonds the metal plates 10 of the laminated state. A gap is formed between the metal plates 10 in the same manner as in the first embodiment on the side surface (the surface facing the inner peripheral surface of the passage) of the laminated body of the metal plates 10 in a pressed and pressure-bonded state. Has been.

  The stacked metal plates 10 are introduced into the passage 70 from an inlet opened on the outer peripheral surface of the forming die 71 of the manufacturing apparatus 7. At this time, the stacked metal plates 10 are aligned with high dimensional accuracy from the inner peripheral shape of the entrance of the passage 70.

  The laminated metal plate 10 that has entered the passage 70 advances through the passage 70 and reaches a position where the coating head 72 is provided.

  The coating head 72 adheres only to the side surface of a portion where a predetermined number of layers are stacked (the number of metal plates 10 for forming one divided core 1) of the stacked metal plates 10 that pass through the passages 70. Apply the agent. Here, as a method of applying the adhesive only to the predetermined portion, the adhesive may be applied by masking other than the predetermined portion.

  The adhesive applied by the application head 72 is injected only into the gap between the metal plates 10 as in the first embodiment.

  The laminated metal plate 10 to which the adhesive is applied travels through the passage 70 again. Accordingly, the metal plate 10 to which no adhesive is applied is positioned at a position facing the application head 72 (a position in the passage 70 where the application head 72 applies the adhesive). Then, the application head 72 applies an adhesive to the metal plate 10 to which the adhesive is not applied. In the manufacturing apparatus of the present embodiment, the adhesive is repeatedly applied.

  The metal plate 10 to which the adhesive has been applied travels through the passage 70 again and reaches a position where the blower head 73 is provided. The blower head 73 blows hot air on the metal plate 10 whose side surface is coated with an adhesive, and cures the applied adhesive.

  In addition, when the metal plate 10 to which the adhesive is applied passes through the passage 70 again, an excessive amount of the adhesive is scraped off by the molding die 71 that partitions the coating head 72 and the blower head 73. .

  When the adhesive is cured by the hot air from the blower head 73, the adhesive bonds the metal plates 10 stacked only in the gap between the metal plates 10 as in the first embodiment.

  Then, the laminated metal plate 10 with the cured adhesive travels again in the passage 70 and is discharged from an outlet opened on the outer peripheral surface of the mold 71. Note that, similarly to the repeated application of the adhesive in the coating head 72, the curing of the adhesive by the blower head 73 can be repeated.

  As described above, the split core 1 can be manufactured by the manufacturing apparatus 7 of the present embodiment.

  In the present embodiment as well, as in the first embodiment, it is possible to manufacture the split core 1 in which high dimensional accuracy and reduction in magnetic properties are suppressed.

  Furthermore, in this embodiment, the division | segmentation core 1 was able to be manufactured continuously by manufacturing the division | segmentation core 1 using the manufacturing apparatus 7. FIG.

(Deformation)
In said 1st-2nd embodiment, as shown in FIG. 16, outer diameter side outer peripheral surface part A, inner diameter side inner peripheral surface part B, teeth part front end surface part C, teeth part peripheral surface part D, core back part periphery The metal plates 10 are bonded to each other over the entire circumference of the split core 1 composed of the surface portion E (the adhesive is applied over the entire circumference). I don't have to know.

  For example, when the stator core of the rotating electrical machine is formed from the split core 1, it is preferable that the portion where the magnetic path is formed is not bonded. Specifically, in the split core 1 used for the stator of the above-described rotating electrical machine shown in FIG. 17, the metal plates 10 are arranged on the outer diameter side outer peripheral surface portion A, the inner diameter side inner peripheral surface portion B, and the tooth portion peripheral surface portion D. It is preferable to perform bonding. In the form shown in FIG. 17, the periphery of the core back portion through which the magnetic path formed between the tooth portion tip surface portion C through which the magnetic path formed between the rotor and the adjacent split core 1 passes is passed. No adhesive is applied to the surface E.

  Further, the outer diameter side outer peripheral surface portion A, the inner diameter side inner peripheral surface portion B, the teeth portion tip surface portion C, the teeth portion peripheral surface portion D, and the core back portion peripheral surface portion E may not be bonded over the entire length. That is, it is preferable to minimize the amount of adhesive applied.

1: Split core 10: Metal plate 11: Teeth part 12: Core back part 2: Rotating electric machine 20: Housing 210, 211: Bearing 3: Stator 30: Stator core 31: Slot 4: Rotor 40: Rotating shaft 5 : Stator winding 50: Winding 51: Conductor 52: Insulating film 53: Fusing material 54: Slot housing part 55: Turn part 56: Winding assembly 6: Outer cylinder

Claims (11)

A manufacturing method for manufacturing a laminated core formed by laminating a plurality of metal plates,
Laminating the metal plate formed into a predetermined shape in a state where a gap is formed at the end and is in close contact with the other than the end; and
Adhering the laminated metal plate by injecting an adhesive into the gap without injecting into other than the gap;
A method for producing a laminated core, comprising:   The method for manufacturing a laminated core according to claim 1, wherein the step of bonding the metal plates is performed by injecting the adhesive in a state in which the laminated metal plates are pressurized in the lamination direction.   The method for manufacturing a laminated core according to claim 1, wherein the step of adhering the metal plate includes applying the adhesive to a side surface of the metal plate in a laminated state.   The method for manufacturing a laminated core according to any one of claims 1 to 3, wherein the predetermined shape is a shape of the laminated core or a shape that can be formed when combined.   The said metal plate is a manufacturing method of the lamination | stacking core in any one of Claims 1-4 shape | molded by stamping.   The method for producing a laminated core according to claim 1, wherein the laminated metal plates are aligned using an alignment frame in a laminated state.   The method for producing a laminated core according to any one of claims 1 to 6, wherein the laminated metal plates are laminated in a number capable of forming a plurality of the laminated cores.   The method for manufacturing a laminated core according to any one of claims 1 to 7, wherein the metal plate in a state where the adhesive is injected is bonded by being heated by blowing a gas.   A laminated core produced by the method for producing a laminated core according to claim 1.   The laminated core according to claim 9, which is a stator core of a rotating electric machine. A stator having the stator core according to claim 10 and a stator winding assembled to the stator core;
A rotating electrical machine comprising: a rotor having magnetic poles alternately formed in a circumferential direction on an inner peripheral side or an outer peripheral side of the stator.

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