JP6537296B2 - Laminate having temporary caulking, method of manufacturing the same, and method of manufacturing laminated core - Google Patents

Description

  The present invention relates to a laminate having temporary caulking, a method of manufacturing the same, and a method of manufacturing a laminated core. In the present invention, it is used to temporarily integrate a plurality of workpieces produced by punching and is removed from a laminate of the plurality of workpieces in the process of producing a product (laminated core). The part is called "temporary caulking".

  A laminated core is a component of a motor, and is formed by stacking a plurality of electromagnetic steel plates (processed bodies) processed into a predetermined shape and fastening them. The motor includes a rotor (a rotor) and a stator (stator) made of a laminated core, and is completed through a process of winding a coil on the stator, a process of attaching a shaft to the rotor, and the like. A motor employing a laminated core has conventionally been used as a drive source for a refrigerator, an air conditioner, a hard disk drive, an electric tool, etc., and in recent years has also been used as a drive source for hybrid cars.

  Crimping and welding are known as means for fastening electromagnetic steel sheets adjacent in the vertical direction in the process of manufacturing laminated core. These fastening means are excellent in cost and work efficiency, and are widely used conventionally. On the other hand, when priority is given to high torque and low core loss of the motor, the magnetic steel sheets may be fastened together using a resin material or an adhesive instead of caulking or welding.

  Patent Document 1 discloses a method of manufacturing a laminated core 110 by temporarily bundling a plurality of core sheets 50 in a scrap portion 12 having caulking and then carrying out a main bundling using a resin material. That is, in the method described in Patent Document 1, the core sheet 50 is temporarily bound by the scrap portion 12 disposed outside the laminated core 110, for example, the laminated core 110 is formed by the insulating resin 13 formed by die cast molding. After the main bundling step, the step of removing the fixing jig 120 (the scrap portion 12) from the laminated core 110 after the final bundling of the laminated core 110, and the like are performed, the split type stator is manufactured (FIG. 3). By removing the fixing jig 120 having the caulking from the laminated core 110 in the manufacturing process, the stator 200 having no caulking is finally obtained.

Patent No. 5357187 gazette

  By the way, FIG. 4 of patent document 1 shows the process of forming the core sheet 50 which has the scrap part 12 from a steel plate 14 using a press die. According to this figure, steps (b) to (e) are required to form the scrap portion 12 (temporary caulking). In the invention described in Patent Document 1, the punching process is complicated for the formation of the scrap portion 12.

  This invention is made in view of the said subject, and an object of this invention is to provide the method of manufacturing sufficient efficiently the laminated body formed by laminating | stacking the several process body which has temporary caulking. Another object of the present invention is to provide a method of manufacturing a laminated core from the above-mentioned laminate and the above-mentioned laminate.

The present invention relates to a method for producing a laminate having temporary caulking, (a) punching a processed body having temporary caulking from a plate to be processed, (b) stacking a plurality of processed bodies, and integrating them by temporary caulking and a step of, the periphery of the provisional caulking forming step (a), and at least one non-separation unit and is connected to the one work piece, is cut from one workpiece, adjacent to the one workpiece And a separation part in contact with the other workpiece .

  According to the manufacturing method of the above-mentioned layered product, when a part which becomes temporary caulking is only punched out by constructing a temporary caulking with a rim composed of a non-separation part and a separating part (when a region corresponding to the temporary caulking is a scrap part) In comparison with the above, the process can be sufficiently suppressed from being complicated. A stack can be obtained sufficiently efficiently by stacking these processed bodies and integrating them by temporary caulking. In addition, since a part of the peripheral edge is connected to the processed body at the non-separation part, the problem of scraping can be solved when forming the temporary caulking.

  The non-separation part may be connected to the workpiece, and may be formed by punching this part in the step (a) or may be formed by half punching. Among them, the case of forming the non-separation part by half blanking processing has an advantage that it is easy to remove the temporary caulking when manufacturing the laminated core from the laminate.

  The step (a) may have a step of forming a through hole smaller than the temporary caulking in a region where the temporary caulking is to be formed on the workpiece plate prior to forming the temporary caulking on the workpiece plate. By providing a through hole in the relevant region in advance, it is possible to relieve the stress generated in the plate to be processed along with the formation of the temporary caulking (that is, the formation of the separated portion and the non-separated portion), thereby sufficiently It can be suppressed.

  The periphery of the temporary caulking may have a curved portion inside the temporary caulking, and in this case, a non-separation portion may be formed in the portion (see FIG. 13A). By forming the non-separation part in the relevant part, it is possible to more sufficiently suppress that the important part from the viewpoint of the mechanical properties, magnetic properties and the like of the laminated core is affected by the strain caused by the temporary caulking removal.

  The processed body may have a plurality of temporary caulkings arranged along the circumferential direction of a circle centered on the axis of the lamination direction of the laminated body, and in this case, the laminated body is configured by removing the temporary caulking. A plurality of through holes or notches are formed in the workpiece. Such an arrangement of temporary caulking is useful for the lamination method referred to as "rolling". The term “rolling” refers to relatively shifting the angle between the laminate of the already stacked workpiece and the workpiece newly stacked on the laminate when laminating the workpiece to obtain a laminate. The step (b) may include the step of transmutation. By rolling the processed body when producing the laminate, the thickness deviation of the electromagnetic steel sheet used as a raw material can be offset, and the influence thereof can be sufficiently reduced.

  In the processed body, temporary caulking and through holes or notches having a shape substantially congruent with the shape of the temporary caulking peripheral edge are regularly arranged in the circumferential direction of a circle centered on the axis in the laminating direction of the laminate. It is also good. By adopting this configuration, even if a plurality of workpieces are rolled, the laminated body can be integrated by the temporary caulking portion by adjusting the angle of rolling (see FIG. 12A). Moreover, when producing a laminated core, the number of temporary caulks which should be removed can be reduced (refer FIG.12 (b)).

The present invention provides a method for producing a laminated core from a laminate having temporary caulking obtained by the above production method. That is, the method of manufacturing a laminated core according to the present invention comprises the following steps.
(C) a step of fastening the laminate produced by the above production method using a resin material, welding, adhesion or a combination thereof.
(D) The process of removing temporary caulking from a laminated body.
According to the above-described manufacturing method, it is possible to finally obtain a laminated core having no caulking by removing the preliminary caulking from the laminate.

The present invention provides a laminated core for laminated iron cores in which a plurality of processed bodies having temporary caulking are laminated and fastened to each other by temporary caulking. In this laminate, the peripheral edge of the provisional caulking, and at least one non-separation unit and is connected to the one work piece is cut from one workpiece, in contact with the other workpiece adjacent to the one workpiece And a separation unit. As described above, this laminated core laminate can be manufactured without undergoing a complicated manufacturing process (in particular, a complicated punching process).

  ADVANTAGE OF THE INVENTION According to this invention, the laminated body formed by laminating | stacking several processed bodies which have temporary caulking can be manufactured sufficiently efficiently.

It is a perspective view which shows an example of a rotor (rotor). It is a schematic cross section in the II-II line shown in FIG. It is a perspective view which shows one Embodiment of the temporarily caulking laminated body for rotors shown in FIG. It is a top view of the laminated body shown in FIG. Fig.5 (a) is an enlarged view of the part enclosed with the circle A of the broken line shown in FIG. 4, FIG.5 (b) is a schematic cross section in the Vb-Vb line shown to Fig.5 (a). 6 (a) is a schematic cross-sectional view taken along a line VIa-VIa shown in FIG. 5 (a), and FIG. 6 (b) is a schematic cross-sectional view taken along a line VIb-VIb shown in FIG. 5 (a). It is the schematic which shows an example of the apparatus for manufacturing the laminated body which concerns on this invention. Fig.8 (a) and FIG.8 (b) are perspective views which each show typically the shape of the punch for removing temporary caulking from a laminated body. Fig.9 (a) is a top view which expands and shows the other example of temporary caulking, FIG.9 (b) is a schematic cross section in the IXb-IXb line | wire shown to Fig.9 (a). Fig.10 (a) and FIG.10 (b) are schematic cross-sectional views which respectively show the other example of temporary caulking. FIG. 11A and FIG. 11B are schematic cross-sectional views showing other examples of the laminate. Fig.12 (a) is a perspective view which shows typically rolling of a processing body, FIG.12 (b) is a schematic cross section which shows an example of the lightweight hole formed by rolling. FIGS. 13 (a) and 13 (b) are plan views showing an example in which the shape of the through hole of the temporary caulking is different in order to prevent the rising of the scrap.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numeral is used for the same element or an element having the same function, and the overlapping description will be omitted.

(Laminated core for rotor)
1 and 2 are a perspective view and a sectional view of a laminated core R for a rotor according to the present embodiment. The shape of the laminated core R is substantially cylindrical. The laminated core R includes a laminate 10 made of a plurality of electromagnetic steel sheets MR, an axial hole 12 for inserting a shaft (not shown) located at the center of the laminate 10, and a magnet for inserting a magnet An insertion hole 15 and a lightweight hole 18 formed between the shaft hole 12 and the magnet insertion hole 15 are provided. Although FIG. 2 shows the laminate 10 consisting of a total of 15 electromagnetic steel sheets MR for convenience, the number of electromagnetic steel sheets MR is not limited to this.

  The laminated core R has a total of 16 magnet insertion holes 15. Two adjacent magnet insertion holes 15 form a pair, and eight pairs of magnet insertion holes 15 are arranged along the outer periphery of the laminated core R at equal intervals. Each magnet insertion hole 15 extends from the upper surface to the lower surface of the laminated core R. The total number of the magnet insertion holes 15 is not limited to 16 and may be determined according to the application of the motor, the required performance, and the like. Also, the shape and position of the magnet insertion hole 15 may be determined according to the application of the motor, the required performance, and the like.

  A magnet (not shown) is accommodated in the magnet insertion hole 15. The magnet is a permanent magnet, and for example, a sintered magnet such as a neodymium magnet can be used. The number of magnets inserted into each of the magnet insertion holes 15 may be one or two or more. The type of magnet may be determined according to the application of the motor, the required performance, etc., and for example, a bonded magnet may be used instead of the sintered magnet. In addition, a magnet divided into a plurality in the thickness direction or the width direction, or both may be used. After the magnet of the magnet insertion hole 15 is inserted, the magnet can be fixed in the magnet insertion hole 15 by filling the magnet insertion hole 15 with the resin material 16.

  For example, a thermosetting resin can be used as the resin material 16. As a specific example of a thermosetting resin, the resin composition containing an epoxy resin, a hardening initiator, and an additive is mentioned. The additive includes a filler, a flame retardant, a stress reducing agent and the like. The resin material 16 joins adjacent electromagnetic steel plates MR in the vertical direction. A thermoplastic resin may be used as the resin material 16. The resin material 16 (except for the resin material used for the flux barrier portion) may contain a magnetic material. When the resin material 16 contains a magnetic body, the content can be in the range of 5 to 90% by volume. If the content of the magnetic material in the resin material 16 is less than 5% by volume, the torque of the motor tends to decrease or cracks due to the difference in the thermal expansion coefficient tend to occur. The workpieces are electrically connected to each other more firmly, which tends to lower the magnetic properties of the laminated core R.

  The laminated core R has a total of four lightweight holes 18 between the axial holes 12 and the magnet insertion holes 15. The cross-sectional shape of the lightweight hole 18 of the present embodiment is substantially square. The four lightweight holes 18 are aligned along the circumferential direction of the shaft hole 12. Specifically, the four lightweight holes 18 are arranged in point symmetry with the central axis of the laminated core R as a point of symmetry, and when rotated by 90 ° around the symmetry point, the four lightweight holes 18 are The positions are formed to coincide with each other. As shown in FIG. 2, each light weight hole 18 is formed to penetrate from the upper surface to the lower surface of the laminated core R. The cross-sectional shape of the lightweight hole 18 is not limited to a substantially square, and may be a substantially circular shape, a substantially elliptical shape, a substantially triangular shape, a substantially polygonal shape, or the like. The lightweight holes 18 may also have the effect of cooling the laminated core R.

(Laser laminate with temporary caulking)
FIGS. 3 and 4 are a perspective view and a plan view of a laminate 20 used to manufacture the laminated core R. FIG. The laminated body 20 has a temporary caulking 8 at a position corresponding to the lightweight holes 18 in the laminated core R. Through the steps of filling the resin material 16 in the magnet insertion holes 15 of the laminate 20, removing the temporary caulking 8 from the laminate 20, and the like, the above-described laminated core R is manufactured.

  The configuration of the temporary caulking 8 will be described with reference to FIGS. The temporary caulking 8 is configured using scraps (portions that do not become products) in the laminated iron core R to be the lightweight holes 18. That is, as shown in FIG. 3, the peripheral edge 9 of the temporary caulking 8 coincides with the peripheral edge of the lightweight hole 18 shown in FIG. In addition, although the scrap part 12 of patent document 1 protrudes outside rather than the outer periphery of a product, in this embodiment, it becomes the lightweight hole 18 located inside the outer periphery of a product (laminated iron core R). Provisional caulking 8 is provided in the part. As a result, it is possible to use a work plate having a minimum necessary width for manufacturing the laminated core R, and to minimize the feed pitch in the punching process, which is advantageous in that material loss can be sufficiently suppressed. is there.

  The peripheral edge 9 of the temporary caulking 8 has two non-separation portions 9a connected to the work body WR, and a separation portion 9b which is a portion other than the non-separation portion 9a in the peripheral edge 9 and cut from the work body WR ( Refer FIG. 5 (a) and (b)). Since the temporary caulking 8 is connected to the workpiece WR at the non-separation portion 9a, it is possible to sufficiently prevent the temporary caulking 8 from coming off the workpiece WR at an unintended timing. In addition, since a part of the peripheral edge 9 is connected to the processed body WR at the non-separation part 9a, the problem of scraping can be eliminated when forming the temporary caulking 8. As shown in FIG. 4 and FIG. 5A, in the temporary caulking 8, two non-separation parts 9a are arranged to be aligned in the radial direction of the workpiece WR. The arrangement of the non-separation part 9a is not limited to this. The position of the non-separating portion 9a may be determined so as to sufficiently suppress the influence of the strain caused by the removal of the temporary caulking from the point of view of the mechanical properties, magnetic properties and the like of the laminated core R.

  In the present embodiment, the non-separation part 9a is formed by half blanking (see FIG. 5 (b)). The peripheral edge 9 having the non-separation part 9a can be formed by using a punch (not shown) having a recess at a position corresponding to the non-separation part 9a. Assuming that the total length of the peripheral edge 9 is 100, the total length of the non-separation portions 9a is preferably about 1 to 30, and more preferably about 2 to 10. If the total length of the non-separation part 9a is 1 or more, the temporary caulking 8 can be sufficiently prevented from coming off the workpiece WR at unintended timing, while if it is 30 or less, the temporary caulking 8 can be relatively easily performed. It can be removed, and the workpiece WR can be sufficiently suppressed from being affected by the strain caused by the removal of the temporary caulking. Here, although the case where temporary caulking 8 has two non-separation parts 9a in the circumference 9 was illustrated, the number of non-separation parts 9a is not limited to two, and may be one, or three or more It may be

  The temporary caulking 8 has a substantially square through hole 8a having a size slightly smaller than that of the temporary caulking 8 at its central portion (see FIGS. 5 (a) and 6 (a)). Since the temporary caulking 8 has the through holes 8 a, the temporary caulking 8 has an annular shape having a substantially square shape in plan view. Although depending on the size of the temporary caulking 8, the width w (the distance from the peripheral edge 9 to the through hole 8a) of the temporary caulking 8 is preferably about 0.5 to 5 mm from the viewpoint of the strength of the temporary caulking 8 etc. Preferably, it is about 1 to 3 mm (see FIG. 5A). The through holes 8 a can relieve the stress along with the formation of the temporary caulking 8, thereby playing a role of sufficiently suppressing the dimensional change of the workpiece WR.

  The non-separation part 9a and the separation part 9b play a role of caulking by forming the non-separation part 9a by half-blanking and making the separation part 9b protrude from the lower surface of the processed body WR. In addition, as shown in FIG.5 (b) and FIG. 6, when manufacturing the laminated body 20 continuously, the laminated body 20 manufactured next is not fastened with the temporary caulking 8 with respect to the laminated body 20 manufactured already. A light weight hole 18 is formed in place of the temporary caulking 8 in the processed body WR which is the lowermost layer of the laminate 20.

(Punching device)
FIG. 7 is a schematic view showing an example of a punching apparatus for manufacturing a processed body WR constituting the laminate 20 by punching. The punching apparatus 100 shown in the figure includes an uncoiler 110 to which a wound mass C is mounted, a feeder 130 for a magnetic steel sheet (hereinafter referred to as a "processed plate W") drawn from the wound mass C, and a processed plate W , And a press machine 120 for operating the progressive die 140.

  The uncoiler 110 rotatably holds the winding weight C. The length of the electromagnetic steel sheet constituting the winding weight C is, for example, 500 to 10000 m. The thickness of the electromagnetic steel sheet constituting the wound-up body C may be about 0.1 to 0.5 mm, and from the viewpoint of achieving more excellent magnetic characteristics of the laminated core R, about 0.1 to 0.3 mm It may be. The width of the electromagnetic steel plate (the plate to be processed W) may be about 50 to 500 mm.

  The feed device 130 has a pair of rollers 130a and 130b which sandwich the work plate W from above and below. The work plate W is introduced into the progressive die 140 via the feeder 130. The progressive die 140 is for continuously performing punching, half punching, and the like on the work plate W. The progressive die 140 has a function of sequentially laminating the workpieces WR obtained by punching and manufacturing a laminated block, and a function of discharging the manufactured laminated block.

(Method of manufacturing laminated core for rotor)
Next, a method of manufacturing the laminated core R will be described. The method of manufacturing the laminated core R includes a process of manufacturing the laminated body 20 integrated by the temporary caulking 8 (steps (A) and (B) below) and a process of manufacturing the laminated core R from the laminated body 20 C) It manufactures through a process and (D) process. More specifically, the method of manufacturing laminated core R includes the following steps.
(A) A step of punching out the processed body WR having the temporary caulking 8 from the work plate W in the forward feed die 140.
(B) A step of stacking a plurality of processed bodies WR and integrating them by temporary caulking 8.
(C) A step of fastening the laminate 20 by filling the magnet insertion hole 15 with the resin material 16.
(D) The process of removing the temporary caulking 8 from the laminated body 20.

  (A) The peripheral edge 9 of the temporary caulking 8 formed in the step is, as described above, the two non-separation portions 9a connected to the processed body WR and the separation portion 9b which is a portion other than the non-separation portions 9a in the peripheral edge 9 Have. By forming the temporary caulking 8 by the peripheral edge 9 composed of the non-separation portion 9a and the separation portion 9b, compared with the case where the portion to be the temporary caulking 8 is simply punched out (when the region corresponding to the temporary caulking 8 is a scrap portion). However, the process can be sufficiently suppressed from becoming complicated. In particular, when a device having a mechanism capable of controlling the amount of ejection of the punch is used as the punching device 100, this effect is more remarkable.

  The non-separation part 9a is formed by half blanking in the step (A). In addition, the non-separation part 9a should just be connected with the processing body WR, and you may form it so that a punch may not contact to the part used as the non-separation part 9a instead of half blanking.

  (A) In the step (A), prior to the formation of the temporary caulking 8 (the formation of the non-separation portion 9a and the separation portion 9b), the through hole 8a smaller than the temporary caulking 8 in the region where the temporary caulking 8 is to be formed Forming a step. By providing the through holes 8 a in advance, it is possible to relieve the stress generated in the work plate W along with the formation of the temporary caulking 8, whereby the dimensional change of the processed body WR can be sufficiently suppressed.

  In the step (B), a plurality of workpieces WR having the temporary caulking 8 are stacked and integrated by the temporary caulking 8. From the viewpoint of reducing the influence of the thickness deviation of the processed body WR, rolling may be performed in the step (B).

  In the steps (C) and (D), the temporary caulking 8 may be removed before the fastening with the resin material 16 as long as the laminate 20 does not fall apart even if the temporary caulking 8 is removed. For example, if the laminate 20 is fixed to a resin-filled device, the temporary caulking 8 may be removed before the resin material 16 is filled, and then the resin insertion material 15 may be filled in the magnet insertion hole 15. Furthermore, temporary caulking 8 may be removed simultaneously with the filling of resin material 16.

  FIG. 8A and FIG. 8B are perspective views schematically showing the shape of the punch for removing the temporary caulking 8 from the laminate 20, respectively. By moving the punches P1 and P2 downward toward the temporary caulking 8 and pushing out the temporary caulking 8, the lightweight hole 18 is formed. The punch P2 shown in FIG. 8 (b) has a tapered portion P2a which can be inserted into the through hole 8a of the temporary caulking 8. The tapered portion P <b> 2 a is configured to abut on at least a part of the side surface of the through hole 8 a of the temporary caulking 8. By moving the punch P2 downward with the tapered portion P2a inserted into the through hole 8a, the detached temporary caulking 8 is held by the tapered portion P2a, and the temporary caulking 8 can be removed more reliably.

  As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to the said embodiment. For example, although the case where the boundary between the non-separation portion 9a and the separation portion 9b is formed substantially in the vertical direction as illustrated in FIG. 5B is illustrated in the above embodiment, the non-separation portion is illustrated as illustrated in FIG. 9a may be configured by a flat portion 9c and two slopes 9d extending downward from both ends of the flat portion 9c. In addition, as long as the temporary caulking 8 is connected to the workpiece WR at the non-separation part 9a, the lower end of the separation part 9b may extend to two workpieces WR as shown in FIG. The temporary caulking 8 may be inclined downward as shown in (b). In addition, the upper surface of the flat part 9c is shifted below the upper surface of the processing body WR by half blanking (refer FIG.9 (b) and FIG. 10).

  Although the case where all the processed bodies have the temporary caulking 8 was illustrated in the said embodiment, the processed body which has the temporary caulking 8 and the processed body (bare core) in which the lightweight hole 18 was already formed instead of the temporary caulking 8 And may be used in combination. In addition, "a rose core" is a processed body in which caulking (including temporary caulking) is not formed, and means a processed body which is not connected with an adjacent processed body. For example, as shown in FIG. 11 (a), a laminated block 10A in which a plurality of workpieces WR are fastened by temporary caulking 8, a laminated block 10B consisting of a plurality of bulk cores WB arranged thereon, and further A laminated body for laminated core may be configured by the laminated block 10A disposed on the upper side. Disposing the stacked blocks 10A respectively on the upper and lower sides of the stacked block 10B composed of the plurality of bulk cores WB can sufficiently prevent the bulk cores WB from being broken during transport of the stacked body or the like. As shown in FIG. 11B, the stacked block 10A may be disposed only under the stacked block 10B without placing the stacked block 10A on the stacked block 10B.

  In the above-mentioned embodiment, although the case where all the processing bodies had four temporary caulking 8 was illustrated, temporary caulking 8 is carried out only at two places which oppose on both sides of an axial hole among four places used as a lightweight hole. May be provided. FIG. 12 (a) is a perspective view schematically showing a state in which the workpiece WR to be newly stacked is rolled at a rotational angle of 90 ° with respect to the laminate 20A in which several workpieces WR are already stacked. . As shown in FIG. 12 (a), by rolling the processed body WR one by one at a rotational angle of 90 °, as shown in FIG. 12 (b), between two temporary caulking 8 adjacent in the vertical direction. A gap can be provided. By adopting such a configuration, there is an advantage that it is easy to remove the temporary caulking 8 in comparison with the case where two temporary caulking 8 are in contact.

  In the above embodiment, the case where the through hole 8a having a relatively simple shape (substantially square) is provided at the center of the temporary caulking 8 is illustrated, but from the viewpoint of preventing gouging when punching the through hole 8a, As shown in FIGS. 13 (a) and 13 (b), the through holes 8a may be provided with raised portions 8b, for example, so as to have different shapes. Further, as shown in FIG. 13A, the peripheral edge 9 of the temporary caulking 8 may be provided with a curved portion 9e inside the temporary caulking 8, and the non-separation portion 9a may be formed in this portion. By forming the non-separating portion 9a in the portion 9e, it is possible to more fully influence that the strain caused by the removal of the temporary caulking 8 exerts an influence on an important part from the viewpoint of mechanical properties, magnetic properties, etc. of the laminated core R. It can be suppressed. In addition, depending on the performance required for the laminated core R and the position where the temporary caulking 8 is provided, the through hole 8 a may not be provided in the temporary caulking 8.

  In the above embodiment, although the case where the temporary caulking 8 is formed at the location to be the light weight hole 18 is illustrated, the location to form the temporary caulking 8 may be, for example, a location to be the magnet insertion hole 15 The hole (not shown) etc. which were separately provided in order to be filled with resin of 5 may be sufficient. Moreover, when providing a notch (not shown) in the outer periphery of the laminated body 20, you may form temporary caulking in the location used as this notch.

  In the present embodiment, the case where the fastening is finally performed by filling the magnet insertion holes 15 of the laminated body 20 with the resin material 16 is illustrated, but in addition to the magnet insertion holes 15, holes for filling resin are separately provided. The fastening of the laminate 20 may be reinforced by providing it and filling it with the resin material 16. Also, the resin material 16 may be used in combination with other fastening means (such as welding and adhesion). When the annealing is performed to eliminate the strain of the workpiece WR, the annealing may be performed at an appropriate timing. For example, when the laminate 20 is integrated with the resin material 16, annealing may be performed prior to filling of the resin material 16, and when welding is used in combination, annealing may also be performed after welding.

  Although the laminated core for the rotor and the method of manufacturing the same are exemplified in the above embodiment, the present invention may be applied to a laminated core (not shown) for the stator and a method of manufacturing the same. In this case, temporary caulking may be provided, for example, in a location that will be the slot portion (not shown) of the laminated core for the stator, or in a location that will be the earhole for bolting (not shown) provided on the outer periphery. May be

  Although the said embodiment illustrated the case where punching process of the to-be-processed body WR was carried out from the to-be-processed board W of 1 sheet, several to-be-processed board W may be piled up and you may make it pierce | punch the to-be-processed body WR. In this case, when using several process board W together, you may use combining what differs in a type, thickness, and / or width. Furthermore, both the workpiece WR and the workpiece for the stator may be punched out of one workpiece W.

8: temporary caulking, 8a: through hole, 9: peripheral edge, 9a: non-separation portion, 9b: separation portion, 9e: curved portion, 16: resin material, 18: lightweight hole (through hole), 20: for laminated core Laminate, P1, P2 ... punch, P2a ... tapered portion, R ... laminated core, WR ... processed body, W ... processed plate.

Claims (10)

It is a manufacturing method of a layered product which has temporary caulking,
(A) punching out a processed body having temporary caulking from a work plate;
(B) stacking the plurality of processed bodies and integrating them by the temporary caulking;
Equipped with
Other peripheral edge of the provisional caulking to form in said step (a), of at least one non-separable unit in communication with one of said work piece is cut from said one working body, adjacent to the processed body of the one A method of manufacturing a laminate, comprising:   The method for manufacturing a laminate according to claim 1, wherein the step (a) includes the step of forming the non-separation part by half punching.   The step (a) has a step of forming a through hole smaller than the temporary caulking in a region of the work plate to be formed with the temporary caulking prior to forming the temporary caulking on the work plate. The manufacturing method of the laminated body of Claim 1 or 2.   The manufacturing method of the laminate according to any one of claims 1 to 3, wherein the periphery of the temporary caulking has a curved portion inside the temporary caulking, and the non-separation portion is formed in the portion. .   The processed body has a plurality of the temporary caulkings arranged along a circumferential direction of a circle centered on an axis line in the laminating direction of the laminated body, and the processed body constituting the laminate by removing the temporary caulking. The manufacturing method of the laminated body as described in any one of Claims 1-4 in which several through-hole or notch is formed in.   In the processed body, the temporary caulking and a through hole or a notch having a shape substantially congruent with the shape of the peripheral edge of the temporary caulking are regularly arranged in the circumferential direction of a circle centered on an axis in the stacking direction of the laminate. The manufacturing method of the laminated body as described in any one of Claims 1-4 arranged side by side.   7. The method according to claim 5, wherein the step (b) comprises a step of relatively shifting an angle between the laminate of the workpieces already stacked and the workpiece to be newly stacked on the laminate. Production method. (C) fastening the laminate produced by the production method according to any one of claims 1 to 7 with a resin material, welding, adhesion, or a combination thereof;
(D) removing the temporary caulking from the laminate;
A method of manufacturing a laminated core, comprising: The step (a) includes the step of forming a through hole smaller than the temporary caulking in the area of the workpiece to be formed with the temporary caulking prior to forming the temporary caulking on the workpiece plate. And
The method for manufacturing a laminated core according to claim 8, wherein in the step (d), the temporary caulking is removed by a punch having a tapered portion in contact with at least a part of the side surface of the through hole of the temporary caulking. It is a laminated body for laminated iron cores in which a plurality of processed bodies having temporary caulking are stacked and fastened to each other by temporary caulking,
Separating the periphery of the provisional caulking, the at least one non-separable unit in communication with one of said work piece is cut from the one of the workpiece, into contact with the other workpiece adjacent to the processed body of the one A laminated core for a laminated core, comprising:

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