JP2019071745A - Method of manufacturing laminated core - Google Patents

Abstract

To provide a method of manufacturing a laminated core capable of joining a plurality of iron core members more reliably.SOLUTION: The method of manufacturing a laminated core includes: obtaining a plurality of iron core members in which an insulating film is provided on at least one main surface of a thin plate-like base material; performing partial removal processing of the insulating film from the main surface side such that the base material is partly exposed on the main surface; and joining the plurality of iron core members with the joint part while arranging the joint part in an exposed region in which the base material is exposed.SELECTED DRAWING: Figure 5

Description

  The present disclosure relates to a method of manufacturing a laminated core.

  Generally, a laminated core is configured by laminating a plurality of punching members obtained by punching a metal plate (for example, an electromagnetic steel sheet) into a predetermined shape. An insulating film is usually provided on at least one surface of the metal plate for the purpose of preventing conduction between the stacked punching members. Moreover, in order to improve the punchability of the punching member from the metal plate, a stamping oil may be applied to the surface of the metal plate.

  When such a punching member is irradiated with a laser beam of high output such that the punching members are welded to each other, soot may be generated around the welding or melting of the insulating film or evaporation of the stamping oil. Blow holes (small holes) are generated. In this case, the quality of the finished laminated core may be affected.

  Therefore, in order to remove the insulating film provided on the surface of the punching member, Patent Document 1 applies a first laser beam to a predetermined location on the outer peripheral surface of the laminate on which the punching member is laminated. The manufacturing method of the laminated body including the process of removing the insulating film of the said location, and the process of irradiating a 2nd laser beam to the same location, and welding punching members in the said location is disclosed. According to the method, since the insulating coating is removed by the first laser beam, the punching members are welded together by the second laser beam irradiation.

Japanese Patent Application Laid-Open No. 11-041871

  By the way, since the punching member is punched out of a metal plate, the insulating coating is present on the main surface of the punching member, but the insulating coating is hardly present on the end face of the punching member which is the fracture surface. . That is, when the outer peripheral surface of the laminate is viewed from the outer peripheral surface side, the insulating coating exposed on the outer peripheral surface is very small. Therefore, according to the method of Patent Document 1, it is considered that the insulating coating that can be removed by the first irradiation of the laser light to the outer peripheral surface of the laminate is very small in the vicinity of the outer peripheral edge of the punching member. Therefore, it can not always be said that welding of the punching members can be suitably performed by the second irradiation of the laser beam.

  Thus, the present disclosure describes a method of manufacturing a laminated core capable of more reliably joining a plurality of core members.

  In the method of manufacturing a laminated core according to one aspect of the present disclosure, obtaining a plurality of iron core members in which an insulating film is provided on at least one main surface of a thin plate-shaped base material; Partially removing the insulating film from the main surface side so as to be exposed to the surface, and bonding a plurality of iron core members by the bonding portion while arranging the bonding portion in the exposed region where the base material is exposed. Including.

  According to the method of manufacturing a laminated core according to the present disclosure, it is possible to more reliably join a plurality of core members.

FIG. 1 is a perspective view showing an example of a stator laminated core according to the first embodiment. FIG. 2 is an enlarged perspective view of a portion II of FIG. FIG. 3 is an enlarged top view showing the vicinity of the teeth portion. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is a cross-sectional view showing a V portion of FIG. 4 in an enlarged manner. FIG. 6 is a schematic view showing an example of a stator laminated core manufacturing apparatus. FIG. 7 is a top view partially showing the mask according to the first embodiment. FIG. 8 is a cross-sectional view showing a resin filling device and a laminate. FIG. 9 is a figure for demonstrating the process of manufacturing a stator laminated core, and is sectional drawing which shows a resin filling apparatus and a laminated body. FIG. 10 is a perspective view showing an example of a stator laminated core according to the second embodiment. FIG. 11 is a perspective view showing a laminate. FIG. 12 is a top view showing a mask according to the second embodiment. FIG. 13 is a perspective view showing an example of a stator laminated core according to the third embodiment. FIG. 14 is a top view showing a mask according to the third embodiment. FIG. 15 is a cross-sectional view showing a stator laminated core according to another example. FIG. 16 is a figure for demonstrating the conventional laser irradiation method, and is sectional drawing which shows a laminated body partially.

  The embodiments according to the present disclosure described below are exemplifications for describing the present invention, and therefore the present invention should not be limited to the following contents.

<< Summary of Embodiment >>
[1] A method of manufacturing a laminated core according to an example of the present embodiment includes obtaining a plurality of iron core members in which an insulating film is provided on at least one main surface of a thin plate-like base material; A plurality of iron core members are joined by the joining portion while the joining portion is disposed in the exposed area where the base material is exposed, and the partial removal process of the insulating film is performed from the main surface side so that the material is partially exposed. And to do.

  In the method of manufacturing a laminated core according to one example of the present embodiment, a laminated body in which a plurality of core members are laminated such that partial removal treatment of the insulating film is performed such that the base material is partially exposed on the main surface It is performed not from the outer peripheral surface side of the base material but from the main surface side of the base material. Therefore, not a very small region near the outer peripheral edge of the core member but a desired region which can be suitably joined to the joint can be made an exposed region by the removal process. In other words, the larger the exposed area from the main surface of the base material, the more electrically conductive the insulation between the adjacent core members can not be maintained, or cause corrosion of the base material, etc. In the prior art, it was recognized by those skilled in the art that conventionally the insulating film should not be removed as much as possible. However, in the method of manufacturing the laminated core according to one example of the present embodiment, the insulating film is A partial removal process is performed from the main surface side, and a junction is then placed in the exposed area, thereby joining a plurality of iron core members while avoiding the above situation. Therefore, it becomes possible to join a plurality of iron core members more certainly via a junction.

  [2] In the method according to the above item 1, each of the plurality of iron core members extends from the yoke portion in a direction intersecting the annular yoke portion and the yoke portion, and forms a space to be a slot while forming the yoke portion Removing a plurality of tooth portions arranged adjacent to each other in the circumferential direction of the core of the outermost core core member constituting the uppermost or lowermost layer of the laminated body in which the plurality of iron core members are laminated. And a plurality of core members are laminated by joining a plurality of core members including partial removal treatment of the insulating film from the main surface side to a surface which is a surface and which forms the peripheral edge of the slot. Inserting the core member into the slot of the laminate, filling the filling space between the slot and the core member with the molten resin, and forming the inner wall surface of the slot and the core member of the outermost core member Junctions with exposed areas and Resin section acting Te may include forming a. In this case, the resin portion which functions as a joint portion is a portion (sometimes referred to as a "main portion") formed on the inner wall surface of the slot and the exposed region where the base material is exposed among the outermost core members. And a portion to be formed (sometimes referred to as an "end"). Therefore, the end is strongly joined to the base material. Therefore, even if a force (also referred to as a "springback force") that causes the plurality of core members constituting the laminate to expand in the laminating direction of the laminate (also referred to as "springback force") is applied to the end, the end is against the base material It is attached more firmly. As a result, it is possible to join the plurality of core members more reliably via the resin portion while suppressing cracking or the like between the end portion and the main portion.

  [3] In the method according to the above-mentioned item 1, the removing treatment includes performing a partial removal treatment of the insulating film from the main surface side to at least one main surface of the plurality of core members. A plurality of iron core members are joined by supplying an adhesive functioning as a joint to the exposed area and laminating a plurality of iron core members one by one to form a plurality of iron core members via the adhesive. And bonding. By the way, it is also conceivable to supply an adhesive to the insulating film to bond the iron core members to each other. However, there may be compatibility between the adhesive and the insulating film depending on the composition of each other, and there may be a concern that sufficient adhesion can not be obtained between the adhesive and the insulating film. Therefore, work may occur to examine the composition of the adhesive and the insulating film such that adhesion can be obtained between the adhesive and the insulating film. On the other hand, according to the method described in Item 3, the adhesive is directly supplied to the base material. Therefore, it becomes possible to join a plurality of iron core members together more reliably via adhesives, without considering compatibility between adhesives and insulating coatings.

  [4] The method according to the above item 2 or 3 is to subject the base material in the exposed area to a surface modification treatment after removing treatment and before joining a plurality of core members. Alternatively, it may further include roughening treatment. In this case, the bonding performance between the resin portion or the adhesive and the exposed area is enhanced chemically or physically. Therefore, it becomes possible to join a plurality of core members more reliably.

  [5] In the method according to the above item 1, the removing process is performed on the main surface of at least one of the main surfaces of the plurality of iron core members, the region forming the outer peripheral edge or the inner peripheral edge of the core member Joining a plurality of core members, including partially removing the insulating coating from the side, exposes the base materials of the adjacent core members in the stacking direction of the stacked body in which the plurality of core members are stacked. The method may include forming a weld that functions as a joint on the outer circumferential surface or the inner circumferential surface of the laminate so as to join through the region. According to the method of the fifth aspect, since the insulating film is partially removed from the main surface side, a wider exposed area is formed as compared to the case where the insulating film is removed from the outer peripheral surface side of the laminate. Be done. Therefore, by welding the exposed regions of the plurality of core members, it is possible to join the plurality of core members more reliably via the welded portion while suppressing the generation of soot, blow holes and the like.

  [6] In the method according to any one of the above-mentioned items 1 to 5, the removal treatment is performed on the main surface with laser light irradiation treatment, blast treatment, or chemical supply treatment. May be included.

  [7] In the method according to any one of the above items 1 to 6, the removing treatment partially removes both the organic component and the inorganic component constituting the insulating film from the main surface May be included. In this case, most of the insulating material is removed in the exposed area. Therefore, it becomes possible to join a plurality of core members more reliably via the junction.

  [8] The removal process in the method according to any one of the above items 1 to 7 mainly involves the partial removal process of the insulating film through the mask member disposed on the main surface side It may also include doing from the face side. In this case, the exposed region can be formed with high accuracy by the removal process through the mask member.

«Exemplary embodiment»
Hereinafter, an example of an embodiment according to the present disclosure will be described in more detail with reference to the drawings. In the following description, the same reference numeral is used for the same element or the element having the same function, and the overlapping description is omitted.

First Embodiment
[Configuration of stator laminated core]
First, the configuration of the stator laminated core 1A will be described with reference to FIGS. The stator laminated core 1A is a part of a stator (stator). The stator is obtained by attaching a winding to a stator laminated core 1A. A stator is combined with a rotor to constitute a motor.

  Stator laminated core 1A includes a laminated body 2 and a plurality of resin portions 3 (joined portions). The laminate 2 has a cylindrical shape. That is, in the central portion of the laminate 2, a through hole 2 a extending along the central axis Ax is provided. A rotor can be disposed in the through hole 2a.

  The laminate 2 has a yoke portion 4 and a plurality of teeth portions 5. The yoke portion 4 has an annular shape and extends so as to surround the central axis Ax. The width, the inner diameter, the outer diameter and the thickness in the radial direction (hereinafter simply referred to as “radial direction”) of the yoke portion 4 can be set to various sizes according to the application and performance of the motor.

  A plurality of concave grooves 6 (six concave grooves in FIG. 1) are provided on the outer peripheral surface of the laminated body 2 (yoke portion 4). The plurality of recessed grooves 6 are arranged at set intervals in the circumferential direction of the yoke portion 4 (hereinafter simply referred to as “circumferential direction”). The recessed groove 6 is recessed from the outer peripheral surface of the laminate 2 toward the central axis Ax. The recessed groove 6 linearly extends from one end surface to the other end surface of the laminate 2 in the lamination direction of the laminate 2 (hereinafter simply referred to as “lamination direction”).

  Each tooth portion 5 extends along a radial direction (direction intersecting with the yoke portion 4) from the inner edge of the yoke portion 4 toward the central axis Ax side. That is, each tooth portion 5 protrudes from the inner edge of the yoke portion 4 toward the central axis Ax. In the laminated body 2, 48 teeth portions 5 are integrally formed in the yoke portion 4. The teeth 5 are arranged at substantially equal intervals in the circumferential direction. Slots 7 which are spaces for arranging a winding (not shown) are defined between adjacent teeth 5.

  Each tooth portion 5 includes a proximal end 5a and an open end 5b, as shown in detail in FIGS. 2 and 3. The base end 5a extends from the yoke 4 and has a rectangular shape as viewed from above. The open end 5 b is provided at an end on the central axis Ax side with respect to the proximal end 5 a. The open end 5 b is also a tip of the teeth 5 on the central axis Ax side. The open end 5 b is separated from the other open end 5 b adjacent in the circumferential direction. Therefore, slit-like openings (slot openings) 8 extending in the stacking direction are defined between the open ends 5 b adjacent in the circumferential direction. The slot 7 is in communication with the opening 8.

  The open end 5 b protrudes more than the base end 5 a in the circumferential direction. That is, the open end 5b is wider than the proximal end 5a, and has a pair of projecting portions 5c located outward of the proximal end 5a in the circumferential direction. The protrusion 5c has a trapezoidal shape. The inner wall surface F1 of the protrusion 5c approaches the other teeth 5 adjacent in the circumferential direction as it goes toward the opening 8 along the radial direction. That is, the inner wall surface F1 of the protrusion 5c is inclined with respect to the extending direction (radial direction) of the tooth portion 5. In other words, the open end 5 b has an inner wall surface F <b> 1 that is an inclined surface that is inclined with respect to the extending direction of the teeth 5.

  The laminate 2 is configured by stacking a plurality of punching members W (iron core members). The punching member W is a plate-like body in which an electromagnetic steel plate ES (a metal plate; a plate to be processed) described later is punched into a predetermined shape, and has a shape corresponding to the laminate 2. The laminate 2 may be configured by so-called rolling. The term "rolling" refers to stacking a plurality of punching members W while relatively shifting the angle between the punching members W. The rolling is performed mainly for the purpose of offsetting the thickness deviation of the laminate 2. The angle of rolling may be set to any size.

  The punching member W includes a thin plate-like base material W1 and an insulating film W2, as shown in detail in FIG. The insulating film W2 is formed on the upper surface S1 and the lower surface S2 which are both main surfaces of the base material W1. On the other hand, the insulating film W2 is not formed on the end face S3 of the base material W1. This is because the punching member W is punched and formed from the electromagnetic steel sheet ES, and the fractured surface of the electromagnetic steel sheet ES by punching forms the end surface S3 of the punching member W. The thickness of the insulating film W2 may be, for example, about 0.5 μm to 2.0 μm.

  In the present embodiment, as shown in FIG. 5, an insulating film is formed on a part of the upper surface S1 of the punching member Wtop (first iron core member) constituting the uppermost layer of the punching member W among the punching members W. W2 is not formed. That is, the area is an exposed area Rex where the base material W1 is exposed. In the present embodiment, the exposed area Rex extends along the periphery of the slot 7 on the top surface S1 of the punching member Wtop (see FIG. 7). However, the exposed area Rex is not configured on the periphery of the open end 5b of the top surface S1 of the punching member Wtop (see the same). In the punching member W, the insulating film W2 is not formed on a partial region of the lower surface S2 of the punching member Wbottom (second iron core member) constituting the lowermost layer of the laminate 2 as in the punching member Wtop. . The area is an exposed area Rex where the base material W1 is exposed.

  Each of the plurality of resin parts 3 is provided in the slot 7 one by one. Specifically, resin portion 3 includes main portion 3a and end portion 3b, as shown in FIGS. The main portion 3a is arranged to cover the inner wall surface F2 of the slot 7 on the inner side (yoke portion 4 side) than the open end 5b. That is, the main portion 3a (the resin portion 3) does not cover the inner wall surface of the open end 5b and does not close the open end 5b and the opening 8. Furthermore, the main portion 3a (resin portion) does not cover the inner circumferential surface of the laminate 2 (teeth portion 5). The thickness of the main portion 3a may be set as appropriate based on the dielectric constant of the resin portion 3 and the working voltage of the motor in which the stator laminated core 1 is used. The thickness of the main portion 3a may be, for example, smaller than the amount of protrusion of the protrusion 5c, and may be about 0.2 mm. In this case, the main portion 3a does not protrude further than the open end 5b (projecting portion 5c) in the circumferential direction.

  The end 3b is integrally provided at the upper end and the lower end of the main portion 3a in the stacking direction, and from the inner wall surface F2 to the end face of the laminated body 2 (end face F3 of the yoke portion 4 and end face F4 of the teeth 5). It's going around. The end 3b protrudes outward more than the end faces F3 and F4 in the stacking direction, and partially covers the end faces F3 and F4. That is, the end faces F3 and F4 each have a covered area R1 covered with the resin portion 3 and a non-covered area R2 not covered with the resin portion 3 (see FIG. 4). In the present embodiment, the non-covering region R2 at the end face F4 (the teeth 5) extends linearly along the extending direction of the teeth 5 (the radial direction of the laminate 2). Therefore, in the teeth portion 5, the end portions 3b of the resin portions 3 adjacent in the circumferential direction are not connected to each other. The end portions 3b of the resin portions 3 adjacent to each other in the circumferential direction may be connected to each other.

  The end 3 b is disposed on the exposed area Rex of the punching member Wtop, Wbottom, as shown in detail in FIG. 5. That is, the end 3b is joined to the exposed base material W1 of the punching members Wtop and Wbottom. The size of the end 3 b may be substantially the same as the exposed area Rex, slightly smaller than the exposed area Rex, or slightly larger than the exposed area Rex. When the size of the end 3b is substantially the same as that of the exposed region Rex, the base material W1 is completely covered by the end 3b, so that oxidation or the like of the base material W1 can be suppressed and the end 3b is an insulating film. Since it hardly overlaps with W2, peeling of the end 3b from the punching member W can be suppressed from the point where the end 3b overlaps with the insulating film W2.

  In the present embodiment, the corner of the resin portion 3 is chamfered. Therefore, the corner portions of the resin portion 3 that wrap around from the inner wall surface F2 to the end faces F3 and F4 are also chamfered. The shape of the chamfer may be R-chamfered or C-chamfered, and if it is in a state in which the corner is scraped, it may be, for example, another shape such as trapezoidal or stepped. It is also good. Alternatively, the main portion 3a or the end portion 3b of the resin portion 3 has an uneven shape in which the concave portion and the convex portion are alternately arranged in the extending direction of the tooth portion along the shape of the winding attached to the tooth portion 5. You may be presenting.

[Stator laminated core manufacturing equipment]
Then, with reference to FIG. 6, the manufacturing apparatus 100 of the stator laminated iron core 1 is demonstrated.

  The manufacturing apparatus 100 is an apparatus for manufacturing the stator laminated core 1 from the electromagnetic steel sheet ES which is a strip-shaped metal plate. The manufacturing apparatus 100 includes an uncoiler 110, a delivery device 120, a punching device 130, a laser irradiation device 200, a resin filling device 300, and a controller 140 (control unit).

  The uncoiler 110 rotatably holds the coil material 111 in a state where the coil material 111 which is a strip-like electromagnetic steel sheet ES wound in a coil shape is attached. The delivery apparatus 120 has a pair of rollers 121 and 122 which sandwich the electromagnetic steel sheet ES from above and below. The pair of rollers 121 and 122 rotate and stop based on an instruction signal from the controller 140, and intermittently and sequentially send the electromagnetic steel sheet ES toward the punching device 130 in one direction.

  The electromagnetic steel sheet ES that constitutes the coil material 111 is the one in which the insulating film W2 is formed on both main surfaces of the metal base material W1. As the metal that forms the base material W1, for example, metal materials for non-oriented electrical steel sheets (full process materials, semi-processed materials, etc.), metallic materials for directional magnetic steel sheets (high magnetic flux density materials, ordinary materials, etc.) It can be mentioned. The insulating film W2 may be made of an insulating organic material, may be made of an insulating inorganic material, or may be made of a mixture of an insulating organic material and an insulating inorganic material. . Examples of the composition of the insulating film W2 include films of various standards defined in JIS C 2557: 2014. Press processed oil (it is also called stamping oil) may be applied to the magnetic steel sheet ES.

  The thickness of the magnetic steel sheet ES may be, for example, about 0.1 mm to 0.5 mm. The thickness of the magnetic steel sheet ES may be, for example, about 0.1 mm to 0.3 mm from the viewpoint of obtaining the stator laminated core 1 having more excellent magnetic characteristics.

  The punching device 130 operates based on an instruction signal from the controller 140. The punching device 130 has a function of sequentially punching the electromagnetic steel plates ES intermittently fed by the feeding device 120 to form the punching member W, and sequentially laminating and laminating the punching members W obtained by the punching. And the ability to produce the body 2.

  When the laminate 2 is discharged from the punching device 130, it is placed on a conveyor Cv provided so as to extend between the punching device 130 and the laser irradiation device 200. The conveyor Cv operates based on an instruction from the controller 140 and sends the stack 2 to the laser irradiation apparatus 200. In addition, between the punching apparatus 130 and the laser irradiation apparatus 200, the laminated body 2 may be conveyed by except conveyor Cv. For example, the stack 2 may be transported by hand while being placed in a container.

  The laser irradiation apparatus 200 has a function of partially removing the insulating film W2 of the punching member W by irradiating the laminated body 2 with a laser beam. The laser irradiation apparatus 200 is provided with the mounting base 201, the mask member 202, and the laser light source 203, as FIG. 6 shows.

  The mounting table 201 has a function of mounting the stacked body 2 conveyed from the punching device 130 via the conveyor Cv.

  The mask member 202 is located above the stack 2 in a state where the stack 2 is mounted on the mounting table 201. The mask member 202 has a plate shape. As shown in FIG. 7, the mask member 202 is provided with a plurality of openings 202 a. Each opening 202 a is provided at a position corresponding to each exposure area Rex of the laminate 2. The shape of each opening 202 a is substantially the same as the shape of each exposed region Rex of the laminate 2. The laser light can pass through the opening 202a but is blocked at a portion other than the opening 202a.

  The laser light source 203 is disposed above the mask member 202. The laser light source 203 is configured to emit laser light downward toward the mask member 202. The laser light source 203 may be configured to be movable relative to the mounting table 201. That is, the laser light source 203 may be movable with respect to the mounting table 201 by a driving mechanism (not shown), or the mounting table 201 may be movable with respect to the laser light source 203 by a driving mechanism (not shown). Both the laser light source 203 and the mounting table 201 may be movable by a drive mechanism (not shown). In particular, if the irradiation range of the laser light is small and accurate scanning of the laser light is possible, the laser light from the laser light source 203 may be directly irradiated to the laminate 2 without passing through the mask member 202. Alternatively, when the irradiation range of the laser light from the laser light source 203 is large and the laser light can be irradiated to all the openings 202 a of the mask member 202 at one time, both the laser light source 203 and the mounting table 201 are You do not have to move.

Examples of the laser light source 203 include solid-state lasers (YAG lasers, fiber lasers, etc.), gas lasers (CO ₂ lasers, etc.), and the like. The laser beam emitted from the laser light source 203 may be, for example, a pulse oscillation laser beam for laser cleaning. The output of the laser beam emitted from the laser light source 203 is an output to such an extent that the insulating film W2 is removed but the base material W1 is not melted, and may be, for example, about 20 W to 500 W. In the case where the insulating film W2 contains an insulating inorganic material, the insulating inorganic material may be completely removed at the portion irradiated with the laser light, or a slight amount of the insulating inorganic material remains. It is also good.

  The resin filling device 300 has a function of filling the filling space V1 (described later) with the molten resin and connecting the punching members W constituting the laminate 2 to each other. As shown in FIG. 8, the resin filling device 300 has a lower die 310, a plurality of guide shafts 320, a plurality of positioning pins 330, a pair of overflow plates 340, a plurality of core members 360, and a lower side. A carp plate 370, an upper carp plate 380 and an upper mold 390 are provided.

  The lower mold 310 is a plate-like member having a rectangular shape. The lower mold 310 is configured to hold the stacked body 2 placed thereon. The lower mold 310 is provided with a plurality of insertion holes 311, a plurality of insertion holes 312, a plurality of insertion holes 313, and an insertion post 314.

  The insertion hole 311 has a shape corresponding to the outer shape of the guide shaft 320 and holds the inserted guide shaft 320. The insertion hole 312 is located closer to the central portion of the lower mold 310 than the insertion hole 311. The insertion hole 312 has a shape corresponding to the positioning pin 330 and holds the inserted positioning pin 330. The insertion hole 313 is located closer to the central portion of the lower mold 310 than the insertion hole 312. The insertion hole 313 has a shape corresponding to the core member 360, and holds the inserted core member 360. The insertion post 314 is located at the center of the lower die 310 and protrudes upward from the lower die 310. The insertion post 314 has a cylindrical shape, and has an outer shape corresponding to the through hole 2 a.

  Each guide shaft 320 has a function of vertically guiding the lower cal plate 370 and the upper die 390. Each positioning pin 330 is configured to be engageable with the recessed groove 6 of the stack 2 placed on the lower die 310 while being held in the insertion hole 312. Therefore, the positioning pin 330 has a function of positioning the stack 2 with respect to the lower mold 310.

  The overflow plate 340 (hereinafter simply referred to as “plate 340”) is a thin plate exhibiting an annular shape. The plate 340 is provided with one through hole 341, a plurality of through holes 342, and a plurality of through holes 343. The through hole 341 has a circular shape and is located at the center of the plate 340. The through hole 341 may be approximately the same as or slightly larger than the diameter of the through hole 2a (the diameter of the insertion post 314).

  Each through hole 342 is provided at a position corresponding to the positioning pin 330, and has a shape corresponding to the positioning pin 330. The through holes 343 are arranged in a circle at substantially equal intervals so as to surround the through holes 341 inside the through holes 342. Each through hole 343 is provided at a position corresponding to each slot 7 of the laminate 2 in a state of being placed on the lower mold 210. The through hole 343 has a shape corresponding to the core member 360 and is one size larger than the core member 360. Therefore, the plate 340 is guided by the positioning pin 330 and is slidable in the vertical direction.

  The core member 360 has a quadrangular prism shape having a substantially trapezoidal bottom surface, and has an outer shape corresponding to the slot 7. The outer shape of the core member 360 is one size smaller than the slot 7.

  The lower cal plate 370 (hereinafter simply referred to as “plate 370”) is a plate-like member having a rectangular shape. The plate 370 is provided with one through hole 371, a plurality of through holes 372, a plurality of through holes 373, a plurality of through holes 374 and a plurality of through holes 375. The through hole 371 has a circular shape, and is located at the center of the plate 370. The through hole 371 may be approximately the same as or slightly larger than the diameter of the through hole 2 a (the diameter of the insertion post 314).

  The through hole 372 has a shape corresponding to the outer shape of the guide shaft 320. The through hole 373 is located closer to the central portion of the plate 370 than the through hole 372. The through hole 373 has a shape corresponding to the positioning pin 330. The through hole 374 is located closer to the central portion of the plate 370 than the through hole 373. The through hole 374 has a shape corresponding to the core member 360. Therefore, the plate 370 is guided by the guide shaft 320, the positioning pin 330 and the core member 360, and can slide in the vertical direction. The through hole 375 is provided between the through holes 373 and 374.

  The upper caliper plate 380 (hereinafter simply referred to as “plate 380”) is a plate-like member exhibiting an annular shape. The plate 380 is provided with one through hole 381, a plurality of through holes 382, a plurality of through holes 383, and a plurality of recessed grooves 384. The through hole 381 has a circular shape and is located at the center of the plate 380. The through hole 381 may be approximately the same as or slightly larger than the diameter of the through hole 2 a (the diameter of the insertion post 314).

  The through hole 382 is located on the center side (closer to the through hole 381) of the plate 380. The through hole 382 has a shape corresponding to the core member 360. The respective through holes 383 are provided at positions corresponding to the respective through holes 375 in a state where the plates 370 and 380 overlap each other. Each recessed groove 384 is formed on the surface of the plate 380 so as to communicate with the corresponding through hole 375.

  The upper mold 390 is a plate-like member having a rectangular shape. The upper mold 390 is provided with a plurality of insertion holes 391 and a plurality of through holes 392. The insertion hole 391 has a shape corresponding to the outer shape of the guide shaft 320. The upper end portion of the guide shaft 320 is inserted into the insertion hole 391. Each through hole 392 is provided at a position corresponding to each recessed groove 384 of the plate 380.

  The controller 140 is configured to send the delivery device 120, the punching device 130, the laser irradiation device 200, and the resin filling device 300 based on, for example, a program recorded in a recording medium (not shown) or an operation input from an operator. It has a function of generating an instruction signal for operation and transmitting the instruction signal to these devices.

[Method of manufacturing stator laminated core]
Subsequently, a method of manufacturing the stator laminated core 1A will be described with reference to FIG. First, the laminate 2 is formed. Specifically, based on the instruction of the controller 140, the electromagnetic steel sheet ES is sent out to the punching device 130 by the feeding device 120, and the to-be-processed portion of the electromagnetic steel sheet ES is punched by the punching device 130 into a predetermined shape. Thereby, the punching member W is formed. A predetermined number of punching members W are laminated by repeating this punching process, and one laminated body 2 is manufactured.

  Subsequently, the conveyor Cv transports the stacked body 2 discharged from the punching device 130 to the laser irradiation device 200 based on the instruction of the controller 140. When the stacked body 2 is mounted on the mounting table 201, the controller 140 instructs the laser light source 203 to irradiate the stacked body 2 with laser light from the laser light source 203. Specifically, the laser beam is applied to the upper surface S1 of the punching member Wtop through the opening 202a of the mask member 202. Thus, a plurality of exposed areas Rex are formed on the upper surface S1 of the punching member Wtop. At this time, the stamping oil adhering to the periphery of the punching member Wtop is also removed from the exposed area Rex by the laser light.

  Subsequently, the stack 2 is placed on the mounting table 201 in a state where the top and bottom of the stack 2 are reversed by a reversing mechanism (for example, a robot hand) or the like (not shown). Thereafter, the controller 140 instructs the laser light source 203 to irradiate the laminated body 2 with the laser light from the laser light source 203. Specifically, the laser beam is applied to the lower surface S2 of the punching member Wbottom through the opening 202a of the mask member 202. Thereby, a plurality of exposed areas Rex are formed on the lower surface S2 of the punching member Wbottom. At this time, the stamping oil adhering to the periphery of the punching member Wbottom is also removed from the exposed area Rex by the laser light.

  Subsequently, the laminate 2 is transported to the resin filling device 300 by a transport mechanism (for example, a robot hand) (not shown) or manually. In the resin filling apparatus 300, preparation for mounting the stack 2 on the lower mold 310 is performed until the stack 2 is transported. Specifically, the guide shaft 220, the positioning pin 330 and the core member 360 are attached to the insertion holes 311, 312 and 313, respectively. Next, the plate 340 is placed on the lower mold 310. Specifically, the plate 340 is lowered toward the lower mold 310 so that the insertion post 314 is inserted into the through hole 341 and the positioning pin 330 and the core member 360 are inserted into the through holes 342 and 343, respectively. . At this time, the through holes 343 of the plate 340 overlap the insertion holes 313 one by one.

  Subsequently, the stack 2 is placed on the prepared lower mold 310. Specifically, the laminated body 2 is directed to the lower mold 310 and the plate 340 so that the insertion posts 314 are inserted through the through holes 2 a of the laminated body 2 and the positioning pins 330 are respectively engaged with the recessed grooves 6. Let down. At this time, the slots 7 of the laminate 2 overlap the through holes 343 respectively.

  Subsequently, the plate 340 is placed on the laminate 2. As a result, the laminate 2 is sandwiched between the pair of plates 340, and each end face of the laminate 2 is covered with the area of the plate 340 excluding the through holes 343.

  Subsequently, the core members 360 are inserted into the respective slots 7. That is, one core member 260 is disposed in the insertion hole 313, the through hole 343, and the slot 7 which communicate in the stacking direction. At this time, the outer peripheral surface of the core member 360 near the yoke portion 4 of the laminate 2 is separated from the inner wall surface F2 of the slot 7. The outer peripheral surface of the core member 360 closer to the opening 8 of the laminated body 2 is in contact with the inner wall surface of the open end 5 b and closes the opening 8. Therefore, a filling space V1 is formed between the core member 360 and the inner wall surface F1 of the slot 7.

  The filling space V1 communicates with the through holes 343 of the plate 340 at the upper and lower sides thereof. That is, a space surrounded by the through hole 343 and the core member 260 functions as a filling space V2 communicating with the filling space V1. In the present embodiment, the filling space V2 is continuously expanded from the filling space V1 so as to face the exposed region Rex.

  Next, the plates 370 and 380 and the upper die 390 are placed on the stack 2 and the plate 340. Thereby, the filling space V2, the filling space V1, the filling space V2, the through hole 375, the through hole 383, the concave groove 384, and the through hole 392 communicate in order from the lower side to the upper side. At this time, even if a load is applied to the laminate 2 through the lower die 310 and the upper die 390 by an actuator (not shown) or the like for the purpose of reducing the gap between the punching members W constituting the laminate 2. Good.

  Next, as shown in FIG. 9, the resin pellet P is disposed in each through hole 392. The resin pellet P is a solid resin exhibiting a cylindrical shape. Subsequently, the plungers 393 are inserted into the respective through holes 392 one by one. In this state, the controller 140 operates the heater (not shown) incorporated in the upper mold 390 and operates the plunger 393. Thereby, the resin pellet P in a molten state is pushed out by the plunger 393, and the molten resin is extruded into the through hole 392, the recess 384, the through hole 383, the through hole 375, the filling space V2, the filling space V1, the filling space V2 It is filled in order of. Thereafter, the molten resin is solidified by a chemical change due to heating at the time of molding, whereby the resin portion 3 is formed in the filling spaces V1 and V2. At this time, the punching members W constituting the laminate 2 are connected by the resin portion 3 and integrated. Thus, the stator laminated core 1A in which the resin portion 3 is provided in the inner wall surface F2 of the slot 7 of the laminate 2 and the exposed area Rex of the punching members Wtop and Wbottom is completed.

[Effect]
By the way, since the punching member W is punched out of the magnetic steel sheet ES, although the insulating film W2 exists on the upper surface S1 and the lower surface S2 of the punching member W, the end surface S3 of the punching member W which is a fracture surface There is almost no insulating film W2. That is, when the outer peripheral surface of the laminate 2 is viewed from the outer peripheral surface side, the insulating coating W2 exposed to the outer peripheral surface is very small. Therefore, when the laser light from the laser light source 203 is irradiated from the outer peripheral surface side of the laminate 2 as in Patent Document 1, as shown in FIG. 16, very close to the outer peripheral edge of the punching member W in the insulating film W2. Only a few parts are removed.

  However, in the first embodiment as described above, the partial removal process of the insulating film W2 in which the base material W1 is partially exposed on the upper surface S1 and the lower surface S2 is performed from the outer peripheral surface side of the laminate 2 Instead, it is performed from the upper surface S1 and lower surface S2 side of the base material W1. Therefore, not a very small region in the vicinity of the outer peripheral edge of the punching member W but a desired region which can be suitably joined to the resin portion 3 (end portion 3b) can be made an exposed region Rex by the removal process. Therefore, the plurality of punching members W can be more reliably joined via the resin portion 3.

  In the first embodiment, the filling spaces V1 and V2 between the slot 7 and the core member 360 are filled with the molten resin, and the resin portion 3 is formed on the inner wall surface F1 of the slot 7 and the exposed area Rex. . The resin portion 3 functioning as a bonding portion includes a main portion 3a formed on the inner wall surface F1 of the slot 7 and an end portion 3b formed in the exposed region Rex. Therefore, the end 3b is strongly joined to the base material W1. Therefore, even if a force (springback force) by which the plurality of punching members W constituting the laminate 2 try to expand in the laminating direction of the laminate 2 is applied to the end 3b, the end 3b is attached to the base material W1. It adheres more firmly to the body. As a result, it is possible to more reliably join the plurality of punching members W through the resin portion 3 while suppressing a crack or the like between the end 3 b and the main portion 3 a.

  In the first embodiment, the laminated body 2 is irradiated with the laser light from the laser light source 203 through the opening 202 a of the mask member 202. Therefore, the exposed region Rex can be formed with high accuracy.

Second Embodiment
[Configuration of stator laminated core]
First, the configuration of the stator laminated core 1B will be described with reference to FIG. The stator laminated iron core 1B is different from the stator laminated iron core 1A in that the machined plates 10 (iron core members) adjacent to each other in the lamination direction of the laminated body 2 are bonded not by the resin part 3 but by the adhesive 20 (joint part) That is the point. Hereinafter, differences from the first embodiment will be mainly described.

  The laminate 2 is obtained by removing the temporary caulking portion 31 from the laminate 30 shown in FIG. In other words, the laminated body 30 is in a state in which the temporary caulking portion 31 is fitted in the recessed groove 6 of the laminated body 2. The stacked body 30 is formed by stacking a plurality of punching members W. That is, the punching member W has a shape corresponding to that of the laminate 30. In other words, the punching member W is in a state in which the temporary caulking piece 41 corresponding to the temporary caulking portion 31 is fitted in the recessed groove 6 of the processed plate 10. However, the punching members W are not joined by the adhesive 20.

  A cutting line CL is provided between the temporary caulking piece 41 and the recessed groove 6 of the processing plate 10. Each cutting line CL may be formed, for example, by cutting or bending or punching the magnetic steel sheet ES, then pushing back the cut or bent portion or the punched part and pressing the original magnetic steel sheet ES. When the electromagnetic steel sheet ES is cut and bent or punched, the cut and bent portion or the punched portion is plastically deformed and slightly extended, and therefore, when the portion is pressed into the original electromagnetic steel sheet ES, the portion and the original electromagnetic steel sheet With ES, they fit tightly to the extent that they can not be easily removed manually.

  The punching members W adjacent to each other in the stacking direction are fastened by a temporary caulking 42 provided on the temporary caulking piece 41 via the temporary caulking piece 41. It can be said that the temporary caulking portion 31 is a laminated body in which the temporary caulking pieces 41 are stacked.

[Method of manufacturing stator laminated core]
Then, the manufacturing method of stator lamination core 1B is explained. The manufacturing apparatus 100 of the stator laminated core 1B includes an adhesive supply device in place of the resin filling device 300.

  First, the laminate 30 is formed. Specifically, the electromagnetic steel sheet ES is sent out to the punching device 130 by the transmission device 120 based on the instruction signal of the controller 140, and the processing portion of the electromagnetic steel sheet ES is punched into a predetermined shape by the punching device 130. Thereby, the punching member W is formed. By repeating the punching process, a predetermined number of punching members W are stacked while being fastened to each other by the temporary caulking 42, and one laminated body 30 is manufactured.

  When the stacked body 30 is discharged from the punching device 130, the temporary caulking portion 31 is removed from the stacked body 30 by a removing device (not shown). For example, the removing device fixes a portion to be the stator laminated core 1B in the laminate 30 and applies a force or the like to the temporary caulking portion 31 in the laminating direction with a piston or the like. Thereby, the temporary caulking part 31 is removed from the laminated body 30, and the temporary laminated body in which the several process board 10 was laminated | stacked in the state in which adjacent process board 10 comrades is not fastened is formed.

  Subsequently, the conveyor Cv conveys the temporary laminated body to the laser irradiation apparatus 200 based on the instruction of the controller 140. In the laser irradiation apparatus 200, the processing plate 10 is taken out one by one from the temporary laminate, and from the laser light source 203 through the mask member 202 with respect to both main surfaces (upper surface S1 and lower surface S2) of the processing plate 10. Laser light is emitted.

  As shown in FIG. 12, the mask member 202 according to the second embodiment includes a plurality of opening sets 202 b arranged at predetermined intervals along the circumferential direction of the yoke portion 4. Each opening set 202 b is configured by a plurality of openings 202 a arranged in a line along the extending direction of the teeth 5. Therefore, when the main surface (upper surface S1 or lower surface S2) of the processing plate 10 is irradiated with laser light from the laser light source 203 through the mask member 202, a plurality of exposures aligned in a row along the extending direction of the teeth portion 5 A plurality of areas Rex are formed on the main surface of the processing plate 10. At this time, when the stamping oil adheres to the periphery of the processing plate 10, the stamping oil is removed from the exposed area Rex by the laser light. Since the other processed plate 10 is not adhered to the upper surface S1 of the processed plate forming the top layer of the laminate 2 and the lower surface S2 of the processed plate forming the lower layer of the laminate 2, laser light is transmitted to these surfaces. It does not need to be irradiated and the exposure area Rex may not be formed.

  Subsequently, the processing plate 10 having the exposed area Rex formed on the main surface is transported to the adhesive supply device by a transport device or a hand (not shown). The adhesive supply device supplies the adhesive 20 in the form of spots to the exposed area Rex formed on the upper surface S1 of one working plate 10. The adhesive supply device stacks the subsequent processing plates 10 on the previous processing plate 10 when the one processing plate 10 is subsequently transported. Thus, the exposed area Rex formed on the lower surface S2 of the subsequent processed plate 10 and the exposed area Rex formed on the upper surface S1 of the immediately preceding processed plate 10 are joined via the adhesive 20. The adhesive supply device repeatedly performs these operations for each of the processing plates 10. Thereby, adjacent process board 10 comrades are joined by the adhesive agent 20, and stator laminated iron core 1B is completed.

  The supply range of the adhesive 20 by the adhesive supply device may be larger than the exposed area Rex, substantially equal to the exposed area Rex, or smaller than the exposed area Rex. When the supply range of the adhesive 20 by the adhesive supply device is larger than the exposed area Rex, the entire exposed area Rex is reliably covered with the adhesive 20, so that it is possible to ensure an insulation state between the punching members W. It becomes. When the supply range of the adhesive 20 by the adhesive supply device is smaller than the exposed area Rex, the adhesive 20 does not easily come out of the exposed area Rex even if the plurality of processing plates 10 are pressurized after the supply of the adhesive 20.

[Effect]
Also in the second embodiment, the partial removal process of the insulating film W2 in which the base material W1 is partially exposed on the upper surface S1 and the lower surface S2 is not from the outer peripheral surface side of the laminate 2 but of the base material W1. It is performed from the upper surface S1 and the lower surface S2 side. Therefore, not a very small area in the vicinity of the outer peripheral edge of the processing plate 10 but a desired area where bonding with the adhesive 20 can be suitably performed can be made an exposed area Rex by the removal process. Therefore, the plurality of punching members W can be more reliably joined via the adhesive 20.

  Also in the second embodiment, the laser beam from the laser light source 203 is applied to the processing plate 10 through the opening 202 a of the mask member 202. Therefore, the exposed region Rex can be formed with high accuracy.

  In the second embodiment, the adhesive 20 is directly supplied to the base material W1. Therefore, the plurality of processed plates 10 can be more reliably joined via the adhesive 20 without considering the compatibility between the adhesive 20 and the insulating film W2.

Third Embodiment
[Configuration of stator laminated core]
First, the configuration of the stator laminated core 1C will be described with reference to FIG. The stator laminated iron core 1C is different from the stator laminated iron core 1A in that punching members W (iron core members) adjacent to each other in the lamination direction of the laminated body 2 are bonded not by the resin part 3 but by the welded part 50 (joint part) It is a point that Hereinafter, differences from the first embodiment will be mainly described.

  The welding portion 50 is formed in the recessed groove 6 so as to extend along the recessed groove 6 in the stacking direction of the laminate 2. That is, the welding portion 50 is formed on the outer peripheral surface of the laminate 2. The exposed area Rex is formed in the vicinity of the recessed groove 6 of each punching member W. Therefore, the welding unit 50 joins the base materials W1 of the punching members W adjacent to each other in the stacking direction of the stacked body 2 via the exposed region Rex. In the third embodiment, the punching members W adjacent in the stacking direction of the stacked body 2 are also joined to each other by the caulking portion 60 provided in the teeth portion 5.

[Method of manufacturing stator laminated core]
Subsequently, a method of manufacturing the stator laminated core 1C will be described. The manufacturing apparatus 100 of the stator laminated core 1C includes a welding device in place of the resin filling device 300.

  First, the laminate 2 is formed. Specifically, the electromagnetic steel sheet ES is sent out to the punching device 130 by the transmission device 120 based on the instruction signal of the controller 140, and the processing portion of the electromagnetic steel sheet ES is punched into a predetermined shape by the punching device 130. Thereby, the punching member W is formed. A predetermined number of punching members W are laminated by repeating this punching process, and one laminated body 2 is manufactured.

  Subsequently, the conveyor Cv transports the stacked body 2 discharged from the punching device 130 to the laser irradiation device 200 based on the instruction of the controller 140. In the laser irradiation apparatus 200, the punching members W are taken out one by one from the laminate 2, and the laser light source is made to both main surfaces (upper surface S1 and lower surface S2) of the punching member W via the mask member 202. Laser light is emitted from 203.

  As shown in FIG. 14, the mask member 202 according to the third embodiment includes a plurality of openings 202 a arranged at predetermined intervals along the circumferential direction of the yoke portion 4. Each opening 202 a is provided at a position corresponding to the recessed groove 6 of the punching member W. Therefore, when the main surface (upper surface S1 or lower surface S2) of the processing plate 10 is irradiated with laser light from the laser light source 203 through the mask member 202, the main surface of the punching member W is exposed in the vicinity of the recessed groove 6. A region Rex is formed. At this time, when the stamping oil adheres around the punching member W, the stamping oil is removed from the exposed area Rex by the laser light.

  Subsequently, the punching member W in which the exposed region Rex is formed on the main surface is joined by the caulking portion 60 while being stacked again, and the stacked body 2 is obtained. The laminated body 2 is conveyed to the welding device by a conveying device (not shown) or manually. The welding device performs welding along the recessed grooves 6 of the laminate 2 to join the base materials W1 of the punching members W adjacent to each other in the laminating direction of the laminate 2 via the exposed region Rex. Thereby, adjacent punching members W are joined by the welding portion 50, and the stator laminated core 1C is completed.

  The welding apparatus may be a laser welding apparatus or a TIG welding apparatus. When the welding device is a laser welding device, the same laser light source as the laser light source 203 of the laser irradiation device 200 may be used in a state where the output is increased to the extent that the base material W1 is melted.

  The formation range of the weld 50 by the welding apparatus may be slightly larger than the exposed area Rex, may be substantially equal to the exposed area Rex, or may be smaller than the exposed area Rex. When the formation range of the weld 50 by the welding device is smaller than the exposed area Rex, the generation of soot, blow holes, and the like is further suppressed.

[Effect]
Also in the third embodiment, the partial removal process of the insulating film W2 in which the base material W1 is partially exposed on the upper surface S1 and the lower surface S2 is not from the outer peripheral surface side of the laminate 2 but of the base material W1. It is performed from the upper surface S1 and the lower surface S2 side. Therefore, not a very small area in the vicinity of the outer peripheral edge of the punching member W but a desired area which can be suitably joined to the weld portion 50 can be made an exposed area Rex by the removal process. Therefore, it becomes possible to join a plurality of punching members W more reliably via welding part 50.

  In the third embodiment, since the partial removal process of the insulating film W2 is performed from the main surface side (the upper surface S1 side or the lower surface S2 side), compared with the case where the insulating film is removed from the outer peripheral surface side of the laminate 2 Thus, a wider exposed area Rex is formed. Therefore, welding is performed so as to continuously join the exposed regions Rex of the plurality of punching members W in the stacking direction of the laminated body 2, thereby suppressing generation of soot, blow holes, and the like, via the welding portion 50. Thus, the plurality of punching members W can be joined more reliably.

Other Embodiments
Although the embodiments according to the present disclosure have been described above in detail, various modifications may be added to the above embodiments within the scope of the present invention. For example, in the first and second embodiments described above, after forming the exposed region Rex, the surface modification treatment or the surface roughening treatment of the exposed region Rex may be performed on the base material W1 in the exposed region Rex. The surface modification treatment is a treatment of forming a functional group on the surface of the base material W1 to improve the bondability with the resin by generating plasma around the punching member W by corona discharge. The surface roughening treatment refers to treatment to form fine unevenness on the surface of the base material W1 chemically or physically. In this case, the bonding performance between the resin portion 3 or the adhesive 20 and the exposed area Rex is enhanced chemically or physically. Therefore, it becomes possible to join a plurality of punching members W or processed plates 10 more reliably.

  Although the insulating film W2 is removed by the laser light from the laser light source 203 in each of the above embodiments, the insulating film W2 may be removed by blasting or chemical supply processing. The blasting refers to a process of removing the insulating film W2 by spraying a large number of fine particles (abrasive) onto the portion to be processed and causing the fine particles to vigorously collide with the portion to be processed. The chemical supply process refers to a process of supplying a chemical capable of dissolving the insulating film W2 (for example, an aqueous solution of sodium hydroxide) to the portion to be processed to remove the insulating film W2 from the portion to be processed.

  In each of the embodiments described above, a plurality of lugs (not shown) projecting radially outward may be integrally provided on the outer peripheral surface of the yoke portion 4. The earlobe portion may be provided with a through hole penetrating the earlobe portion in the stacking direction of the laminate 2. The through hole functions as, for example, a bolt insertion hole for fixing the stator laminated core 1A to 1C to a motor housing (not shown). The number of ear parts (the number of through holes) may be appropriately set according to the type of stator laminated iron core 1 or the like.

  In each of the above-described embodiments, the laser light may be irradiated to both main surfaces of the punching member W or the processing plate 10, or the laser light may be irradiated to only one main surface. When the laser light is irradiated to both main surfaces of the punching member W or the processing plate 10, the laser light may be individually irradiated to each main surface, or the two main laser light sources 203 may be used to The surface may be irradiated with laser light simultaneously.

  In each of the above embodiments, the exposed area Rex is formed on the punching member W or the processing plate 10 after being punched out of the magnetic steel sheet ES, but before the punching of the punching member W from the magnetic steel sheet ES The exposed area Rex may be formed in a predetermined area of the magnetic steel sheet ES, or the exposed area Rex may be formed in the middle of punching the punching member W.

  In each of the above-described embodiments, the punched member W or the processed plate 10 is laminated to form the laminate 2, but the laminate 2 is a laminate of a plurality of block bodies (iron core members) It is also good. The block body is, for example, one in which a plurality of punching members W are stacked and integrated.

  In each above-mentioned embodiment, punching member W or processing boards 10 comrades may be joined mutually by caulking, may be joined mutually by adhesives, and may be joined mutually by welding. . Or the laminated body 2 of said 1st and 3rd embodiment may also remove the temporary caulking part 31 from the laminated body 30.

  In the first embodiment described above, the resin portion 3 may close the open end 5 b and the opening 8. The end 3b of the resin portion 3 may be formed on both the upper surface S1 of the uppermost punching member Wtop and the lower surface S2 of the lowermost punching member Wbottom, or may be formed on one side. . That is, the end 3b may extend around both of the punching members Wtop and Wbottom, or may extend around one.

  In the first embodiment described above, the core member 360 may be provided integrally with the insertion post 314.

  In the second embodiment described above, bonding between the processing plates 10 may be performed inside the punching device 130.

  In the second embodiment described above, the position of the exposed region Rex, that is, the supply position of the adhesive 20 does not necessarily have to overlap when viewed from the stacking direction of the stack 2.

  In the third embodiment described above, the exposed region Rex may be formed in the vicinity of the inner peripheral edge of the punching member W, and welding of the plurality of punching members W may be performed from the inner peripheral surface side of the laminate 2.

  In each of the above-described embodiments, the punching member W may have the insulating film W2 formed on one of the main surfaces (upper surface S1 or lower surface S2) of the base material W1. Specifically, in the case of the first embodiment, as shown in FIG. 15A, the resin portion 3 (the end 3b) is in the exposed area Rex provided on the upper surface S1 of the punching member Wtop of the uppermost layer. It is arranged. In this case, the resin portion 3 (the end 3b) may or may not be formed on the lowermost punching member Wbottom. In the case of the second embodiment, as shown in FIG. 15B, the processed plate 10 is supplied with the adhesive 20 in a spot shape to the exposed area Rex formed on the insulating film W2 on the upper surface S1 of the processed plate 10. The stator laminated core 1B may be obtained by sequentially laminating In the case of the third embodiment, as shown in FIG. 15C, after the punching members W in which the exposed region Rex is formed on the insulating film W2 on the upper surface S1 are sequentially laminated, the mothers of the adjacent punching members W The stator laminated core 1C in which the plurality of punching members W are joined by the welding portion 50 may be obtained by welding the materials W1 with each other through the exposed region Rex.

  Not only stator laminated core 1A-1C but the manufacturing method of the laminated core which concerns on this indication may be applied to a rotor laminated core.

  DESCRIPTION OF SYMBOLS 1A, 1B, 1C ... Stator laminated core, 2 ... Laminate, 3 ... Resin part (junction part), 4 ... Yoke part, 5 ... Teeth part, 7 ... Slot, 100 ... Stator laminated core manufacture apparatus, 10 ... processed plate (iron core member), 20 ... adhesive (joint portion), 50 ... welded portion (joint portion), 200 ... laser irradiation device, 202 ... mask member, 203 ... laser light source, 300 ... resin filling device, 360 ... Core member, Rex: exposed area, S1: upper surface (main surface), S2: lower surface (main surface), W: punching member (iron core member), W1: base material, W2: insulating film, Wbottom: punching member (2nd iron core member), Wtop ... punching member (1st iron core member).

Claims (8)

Obtaining a plurality of core members provided with an insulating film on at least one main surface of a thin plate-like base material;
Partially removing the insulating film from the main surface side so that the base material is partially exposed on the main surface;
And bonding the plurality of iron core members by the bonding portion while arranging the bonding portion in the exposed region where the base material is exposed. The plurality of core members respectively extend from the yoke portion in the direction crossing the annular yoke portion and the yoke portion, and are arranged adjacent to each other in the circumferential direction of the yoke portion while forming a space to be a slot. Including multiple teeth and
The removing process is performed on the main surface of the outermost core member constituting the uppermost layer or the lowermost layer of the laminated body in which the plurality of core members are laminated, with respect to the region forming the periphery of the slot, Including partially removing the insulating film from the main surface side,
Joining the plurality of core members is:
Inserting a core member into the slot of the laminated body in which the plurality of core members are laminated;
The filling space between the slot and the core member is filled with a molten resin, and the joint is made between the inner wall surface of the slot and the exposed region of the outermost core member of the iron core member where the base material is exposed. Forming a resin part that functions as a part. The removing treatment includes performing a partial removal treatment of the insulating film from the main surface side to at least one of the main surfaces of the plurality of core members,
Joining the plurality of core members is:
Supplying an adhesive that functions as the joint to the exposed area;
The method according to claim 1, comprising: bonding the plurality of iron core members via the adhesive by laminating the plurality of iron core members one by one.   The method according to claim 1, further comprising performing surface modification treatment or roughening treatment on the base material in the exposed area after removing treatment and before bonding the plurality of core members. The method described in 2 or 3. The removal process is performed on at least one of the main surfaces of the plurality of core members, with respect to a region forming the outer peripheral edge or the inner peripheral edge of the core member, from the main surface side to a part of the insulating film. Including removing it,
The joining of the plurality of iron core members may be performed by joining the base materials of the iron core members adjacent to each other in the laminating direction of the laminated body in which the plurality of iron core members are laminated via the exposed region. The method according to claim 1, comprising forming a weld that functions as a part on an outer peripheral surface or an inner peripheral surface of the laminate.   The method according to any one of claims 1 to 5, wherein the removing treatment includes performing a laser beam irradiation treatment, a blast treatment, or a chemical supply treatment on the main surface.   The method according to any one of claims 1 to 6, wherein the removing treatment partially removes both the organic component and the inorganic component constituting the insulating film from the main surface.   The removal process includes performing the partial removal process of the insulating film from the main surface side through the mask member disposed on the main surface side. The method described in.

Images