JP5946938B2 - Method for manufacturing laminated iron core with permanent magnet sealed with resin - Google Patents

Description

The present invention fixes a permanent magnet (including an unmagnetized magnet) to a laminated core body formed by laminating iron core pieces with a resin (referred to as “magnet molding method”) laminated iron core (rotor or fixed) Relates to a manufacturing method of a child.

Conventionally, as a method of fixing a permanent magnet to a laminated core body by resin sealing, for example, there is a method described in Patent Document 1. In this method, a plurality of magnet insertion holes are provided in the radially outer region of the laminated core body of the rotor, permanent magnets are inserted into the magnet insertion holes, and are sandwiched between the lower mold and the upper mold, and provided in the upper mold. The resin was filled from the resin pot into the magnet insertion hole, and the permanent magnet was fixed.

On the other hand, since the magnet insertion hole described in Patent Document 1 is rectangular in plan view and the periphery is sealed, there is no concern that the resin leaks to the side, but when a permanent magnet is arranged in a closed space with a rectangular cross section, Since there is much leakage of the magnetic flux generated by the permanent magnet, opening a part of the magnet insertion hole to reduce the leakage of the magnetic flux of the permanent magnet is performed. When filling a resin into a magnet insertion hole having such a part opened sideways (that is, an opening), an appropriate closing member is disposed in the opening and the magnet insertion hole is viewed in plan view. Resin sealing is performed as a closed space.

JP 2010-158164 A

However, in the above technique, it is necessary to prepare a closing member separately, and even if it can be used repeatedly, after removing the closing member from the resin-sealed laminated iron core, it is necessary to clean the closing member, Time-consuming work was necessary.

The present invention has been made in view of such circumstances, and without requiring a special closing member, a laminated iron core that performs resin sealing of a permanent magnet by closing a magnet insertion hole having a part of an opening. An object is to provide a manufacturing method.

The method for manufacturing a laminated core according to the first aspect of the present invention is formed by laminating a plurality of pieces of iron core , having a pair of magnet insertion holes, and on the center side of the pair of magnet insertion holes. The magnet of the laminated core main body comprising an inner space portion that communicates with the magnet insertion hole via an opening , or an outer space portion that communicates with the magnet insertion hole via an opening and is opened to the outside. In a method for manufacturing a laminated core in which a permanent magnet is inserted into an insertion hole and the opening is closed with a closing member, and the permanent magnet is resin-sealed in the magnet insertion hole.
A part or all of the outer periphery of the closing piece member forming the closing member is frictionally held on the iron core piece around it, and the permanent magnet is resin-inserted into the magnet insertion hole of the laminated core body assembled with the iron core piece. After sealing, the blocking member is removed.

Further, in the method for manufacturing a laminated core according to the second aspect of the present invention, a plurality of core pieces are formed by being laminated and have a pair of magnet insertion holes. The magnet insertion hole of the laminated core body having an inner space portion that communicates with the magnet insertion hole via the opening portion, or an outer space portion that communicates with the magnet insertion hole via the opening portion and is opened to the outside. In the manufacturing method of the laminated iron core in which the permanent magnet is resin-sealed in the magnet insertion hole in a state where the permanent magnet is inserted into the opening and the opening is closed with a closing member.
The closing piece member forming the closing member is formed by half punching with respect to the iron core piece, and the upper and lower adjacent iron core pieces are connected via the half punching closing piece member to assemble the iron core piece. After the permanent magnet is resin-sealed in the magnet insertion hole of the laminated core body, the blocking member is removed.

According to a third aspect of the present invention, there is provided a method for manufacturing a laminated iron core, comprising : a plurality of iron core pieces laminated to each other, having a pair of magnet insertion holes, wherein the magnet is inserted at a center side of the pair of magnet insertion holes. A permanent magnet is inserted into the magnet insertion hole of the laminated core main body having an inner space portion communicating with the hole via the opening, and the permanent magnet is inserted into the magnet while the opening is closed with a closing member. In the manufacturing method of the laminated iron core resin-sealed in the hole,
The closing piece member forming the closing member includes an abutting portion in contact with the iron core piece at both edges of the opening, and a connecting portion partially connected to the iron core piece by V notch, half punching or constriction. The permanent magnet is resin-sealed in the magnet insertion hole of the laminated core body having the core pieces assembled, and the blocking member is removed .

A method for manufacturing a laminated core according to a fourth invention is the method for manufacturing a laminated core according to the first to third inventions, wherein the closing piece member is provided with a caulking portion and is adjacent to the upper and lower sides. It has a structure that can be caulked and laminated.

And the manufacturing method of the laminated iron core which concerns on 5th invention is the manufacturing method of the laminated iron core which concerns on the 1st- 4th invention. After resin-sealing the said permanent magnet to the said magnet insertion hole, the said laminated | stacked said The closing piece member is punched and removed using a punch or pressed with a pin member and removed.

Since the method for manufacturing a laminated core according to the present invention is configured as described above, it is not necessary to prepare a highly accurate closing member as in the prior art in order to close the opening of the magnet insertion hole. In the present invention, since the closing member is formed using a part of the material of the iron core piece, the closing member is disposable and can be freely selected according to the shape of the laminated core.

(A) is a top view of the laminated core which applied the manufacturing method of the laminated core which concerns on the 1st Embodiment of this invention, (B) is the same front view. (A)-(C) are the elements on larger scale of the core piece used for the same laminated iron core, respectively. (A)-(F) is explanatory drawing of the means to temporarily connect the obstruction piece member and the surrounding iron core piece. (A), (B) is explanatory drawing of the manufacturing method of the laminated iron core which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which expanded the iron core piece used for the manufacturing method of the laminated iron core partially. It is explanatory drawing of the manufacturing method of the laminated core which concerns on the 3rd Embodiment of this invention. It is explanatory drawing of the effect of the manufacturing method of the same laminated iron core. It is explanatory drawing of the manufacturing method of the laminated core which concerns on the 4th Embodiment of this invention. It is explanatory drawing of the manufacturing method of the laminated core which concerns on the 5th Embodiment of this invention. It is explanatory drawing of the manufacturing method of the laminated core which concerns on the 6th Embodiment of this invention, (A) is a top view, (B) is a back side perspective view, (C) is sectional drawing. It is explanatory drawing of the manufacturing method of the laminated iron core which concerns on the 7th Embodiment of this invention, Comprising: (A) is a top view, (B) is a back side perspective view.

Next, embodiments of the present invention will be described with reference to the accompanying drawings. First, a laminated core 10 manufactured by the method for manufacturing a laminated core according to the first embodiment of the present invention will be described with reference to FIGS. 1 (A) and 1 (B).

As shown in FIGS. 1 (A) and 1 (B), a laminated core 10 is used for a rotor, and a laminated core body 10a formed by caulking and laminating a plurality of annular core pieces 11 And a plurality of (four in this embodiment) pairs of magnet insertion holes 13 and 14 in the radially outer region. An inner space 15 is provided between the pair of magnet insertion holes 13 and 14, and the inner space 15 and the magnet insertion holes 13 and 14 communicate with each other via openings 17 and 18. The laminated core body 10a is constituted by caulking and laminating iron core pieces 11, and the permanent magnets 20 and 21 are not resin-sealed in the magnet insertion holes 13 and 14, respectively. Further, stoppers (inner protrusions) that stop the lateral movement of the permanent magnets 20 and 21 are formed between the magnet insertion holes 13 and 14 and the openings 17 and 18. This stopper can be omitted when the permanent magnets 20 and 21 are in a predetermined position.

This inner space 15 reduces the weight of the rotor (that is, the laminated core 10), and further communicates with the magnet insertion holes 13, 14 to rotate the permanent magnets 20, 21 embedded in the magnet insertion holes 13, 14. This is to improve the magnetic characteristics for the child. In the intermediate stage of manufacturing the laminated core 10, a closing member 23 that can be finally removed is provided in the inner space 15 to close the opposed openings 17 and 18. The closing member 23 has projections 27 and 26 (an example of a latching projection) that fit into dovetail grooves 25 and 24 (an example of a latching recess) formed inside and outside in the radial direction of the substantially rectangular inner space 15 in plan view. have. The circumferential side portions 29 and 30 of the closing member 23 completely close the openings 17 and 18 to prevent resin leakage.

Then, the manufacturing method of the laminated core which concerns on the 1st Embodiment of this invention which manufactures this laminated core 10 is demonstrated. In the following description, since the shape of the laminated core body 10a and the core piece 11 in a plan view excluding the permanent magnets 20 and 21 is the same, the same names and symbols are used unless otherwise specified. .
The iron core piece 11 is formed by punching a thin strip material made of a magnetic material having a constant width (not shown) with a mold apparatus. Although the order of punching is arbitrary, for example, 1) formation of the central shaft hole 12, 2) formation of the magnet insertion holes 13 and 14 and subsequent openings 17 and 18, and 3) blockage for forming the closing member 23 Formation of holes 33 to 36 for forming the piece member 32 (see FIG. 2), 4) formation of a well-known caulking portion (not shown) for joining the upper and lower iron core pieces 11, and 5) inner space of the closing piece member 32 In order not to fall from 15, the process of temporarily connecting to a part of the inner space 15 is performed, the outer shape is extracted by dropping the core piece 11 from the thin strip material, and the core piece 11 is caulked and laminated in the die. Become.

1) Formation of the central shaft hole 12 2) Formation of the magnet insertion holes 13 and 14 and subsequent openings 17 and 18 3) Holes 33 to 36 for forming the closing piece member 32 for forming the closing member 23 Since this is performed by a well-known method of forming a through-hole in a thin sheet material using a punch and a die, detailed description is omitted.
Processing for temporarily connecting the closing piece member 32 to a part of the inner space 15 so as not to drop from the inner space 15 including the dovetail grooves 24 and 25 will be described in detail below.

(1) First Method for Temporarily Connecting Closing Piece Member 32 to Inner Space 15 For closing piece member 32 including protrusions 26 and 27 fitted into dovetail grooves 24 and 25, FIGS. As shown in FIG. 3C, the punch 38 and die 39 are punched to completely separate the material (in some cases, half punching may be used), and flat punches 40 and 41 are used as shown in FIG. And push it back to its original position. As a result, the closing piece member 32 and the inner space 15 are connected while being frictionally held, and thus, the closing piece member 32 is held in the state as it is and is held by the iron core piece 11 to finally form the closing member 23 in which the closing piece member 32 is laminated.
Thereafter, the permanent magnets 20 and 21 are inserted into the magnet insertion holes 13 and 14 of the laminated core body 10a, and the laminated core body 10a is sealed with resin. In this case, since the openings 17 and 18 are closed by the closing member 23, the sealed resin does not leak. In addition, after the resin sealing of the magnet insertion holes 13 and 14 is completed, if the pressing force is applied to the closing member 23 from above or below with a punch or the like, it is removed (punched out) from the inner space 15. The dovetail grooves 24 and 25 hold the closing piece member 32 in the inner space 15 and can prevent the closing piece member 32 from shifting. In the first method, the dovetail grooves 24 and 25 are not essential requirements, and the dovetail grooves 24 and 25 can be eliminated as shown in FIGS.

(2) Second method of temporarily connecting the closing piece member 32 to the inner space 15 The front portions of the protrusions 26 and 27 are put into the dovetail grooves 24 and 25, but this portion is completely separated and the closing piece member 32 In the portions 43 to 46 where the circumferential side portions 29 and 30 are connected to the core pieces 11 on the radially inner and outer sides of the openings 17 and 18, a V notch 47 as shown in FIG. Shape groove). The V notch 47 is formed by a V punch, and the plate thickness t1 is about 0.05 to 0.1 mm. The angle of the V notch 47 is preferably an acute angle, but may be 90 degrees in consideration of wear of the V notch 47.

As a method of separating the tip portions of the protruding portions 26 and 27 in the dovetail grooves 24 and 25, as shown in FIG. 3 (E), the plate material a (that is, the protruding portions 26 and 27) is bent into one shape with a predetermined shape. Cut and push back again with a flat punch as shown in FIG. 3 (F), or press the plate material a against a flat die to make it flat. As a result, the closing piece member 32 is connected to the periphery of the inner space 15 by the portions 43 to 46 in which the V notches 47 are formed, so that the laminated closing piece member 32 becomes the closing member 23 and becomes the opening 17. , 18 can be sealed and resin sealing can be performed stably. After the resin sealing is completed, the closing member 23 is removed. Also in this example, the dovetail grooves 24 and 25 are not essential requirements and can be omitted as shown in FIGS.

(3) Third Method of Temporarily Connecting the Closure Piece Member 32 to the Inner Space 15 As shown in FIGS. 2B and 2C, the protrusions 50 to 53 of the cruciform closure piece member 49 and the inner space 15 Are connected by a V notch 47 as shown in FIG. This facilitates the removal of the closing member 23 in which the closing piece member 49 is laminated after resin sealing on the laminated core body 10a.

In the above embodiment, the closing piece members 32 and 49 can be caulked, and the closing piece members 32 and 49 adjacent in the vertical direction can be caulked and laminated. In this case, the V-notch 47 is formed only in the closing piece members 32 and 49 located at the uppermost position, and the closing piece members 32 and 49 between them are separated from the surroundings, and all the closing piece members 32 and 49 are caulked. It is preferable to laminate. Thus, the closing member 23 is stably held in the inner space 15 and can be easily removed. Further, the widths of the portions 43 to 46 (see FIGS. 2A, 2B, and 2C) where the V notches 47 are formed are in the range of 0.5 to 2 mm, and removal is performed as the width is narrower. Further, when the permanent magnets 20 and 21 are sealed with resin, deformation of the laminated core 10 due to thermal expansion of the closing piece members 32 and 49 can be prevented. In addition, by forming the openings 17 and 18 of the magnet insertion holes 13 and 14 to be small, the amount of resin in contact with the closing member 23 can be reduced, and the removal of the closing member 23 is facilitated.

Then, the manufacturing method of the laminated core which concerns on the 2nd Embodiment of this invention is demonstrated, referring FIG. 4, FIG.
4 (A), (B), and FIG. 5 show a part of the laminated core body 55, but the whole is the same as FIGS. 1 (A) and (B), with a shaft hole in the center and its periphery. Magnet insertion holes 56 and 57 to be paired with each other. In the final product, the magnet insertion holes 56 and 57 are communicated with the outer space 60 that is communicated with the outer side in the radial direction of the laminated core body 55 (that is, opened outward) through the openings 58 and 59.

And before the magnet insertion holes 56 and 57 containing the permanent magnet are sealed with the resin, the closing member 61 is disposed in the outer space 60, and the closing member 61 is removed after the resin sealing is completed.
The closing piece member 62 constituting the closing member 61 is temporarily connected to the surrounding iron core piece 63, and the iron core piece 63 is extracted and stacked in the die. The laminated closing piece member 62 becomes the closing member 61 and closes the openings 58 and 59 of the magnet insertion holes 56 and 57.

Since the place where the closing piece member 62 and the iron core piece 63 are temporarily connected is the central connection portion 64 and the side connection portions 65 and 66, these portions are temporarily connected. The temporary connection method is as follows: 1) A method of inserting a V notch 47 as shown in FIG. 3 (D) in all of the central connection portion 64 and the side connection portions 65 and 66; 3) A method of performing a punching process as shown in A), 3) A cutting and bending process as shown in FIG. 3 (E) is performed on any one or two of the central connecting part 64 and the side connecting parts 65 and 66. 4) A method of forming the V-notch 47 only on the closing piece member 62 located at the uppermost position and caulking and closing the closing piece member 62, and 5) 1) above In addition to the method (4), there is a method of providing a latching recess such as a dovetail groove and a latching projection.

Next, the main part of the method for manufacturing a laminated core according to the third embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 6, in this embodiment, the laminated core body has an inner space 70 that communicates with the magnet insertion holes 13 and 14 on both sides via openings 68 and 69, respectively. A closing member 71 that closes the openings 68 and 69 is provided.

The closing piece member 71a that forms the closing member 71 is disposed horizontally (that is, along the circumferential direction of the laminated iron core) and the blocking pieces 72 and 73 and the contracting portions 76 and 77 perpendicular to them (ie, And vertical piece portions (examples of other portions) 74 and 75 provided along the radial direction of the laminated iron core, and have a cross shape in plan view. The blocking pieces 72 and 73 are formed so as to block the openings 68 and 69, and the blocking pieces 72 are formed against the openings 68 and 69 or the core pieces 11 around the openings 68 and 69. 73 are joined (contacted) in a state where they are separated by cutting, bending and cutting. Further, shrinkage portions 76 and 77 formed by bending in a zigzag shape in plan view are provided on the base side of the blocking pieces 72 and 73, and the distal ends of the blocking pieces 72 and 73 are openings. When pressed in the axial direction by the resin filled in 68 and 69, the contraction portions 76 and 77 are elastically contracted (that is, can be retracted).

On the other hand, the tips of the vertical piece portions 74 and 75 of the closing piece member 71a are connected to the core piece 11 forming the inner space 70 via neck portions 78 and 79 having a reduced width. Here, the width of the neck portions 78 and 79 is preferably about 1/10 to 1/2 of the width of the vertical piece portions 74 and 75, for example. The closing piece member 71 a can be reliably held in the inner space 70 by the neck portions 78 and 79. Instead of the neck portions 78 and 79, V notches may be used.
As a result, when resin sealing is performed on the magnet insertion holes 13 and 14, the resin does not flow into the inner space 70, and after the resin sealing of the laminated iron core, the closing member 71 on which the closing piece member 71 a is easily stacked is attached. Can be removed.

Further, there is an advantage described below by separating the tips of the blocking pieces 72 and 73 from the iron core piece 11 and further providing the contraction portions 76 and 77 on the base side of the blocking pieces 72 and 73. That is, as shown in FIG. 7, generally, when the plate material 80 is punched using a punch 81 and a die 82, the width w of the punched piece 83 becomes wider than the width v of the punched hole 84. Since the increased width (w−v) is constant, when the punched piece 83 is returned into the punched hole 84 by cutting and bending (or punching and subsequent pushing back), the punched piece 83 is buckled in the thickness direction ( That is, the board bends). Therefore, if elastic contraction portions 76 and 77 are provided on the base side of the blocking piece portions 72 and 73, the buckling force in the thickness direction is absorbed by the contraction portions 76 and 77. There is an advantage that buckling with thickness deviation does not occur. Here, cutting and bending means making a flat surface by cutting and bending back.

Then, the principal part of the manufacturing method of the laminated core which concerns on the 4th Embodiment of this invention shown in FIG. 8 is demonstrated.
In this embodiment, the closing piece member 86 constituting the closing member includes an annular contracting portion 87 and blocking pieces provided on both sides of the contracting portion 87 (that is, in the circumferential direction with respect to the laminated iron core). 89 and 90 and vertical piece portions 91 and 92 provided above and below the contraction portion 87 (that is, in the radial direction with respect to the laminated iron core). The blocking pieces 89 and 90 are formed by cutting and bending, and the tips of the blocking pieces 89 and 90 are completely separated from the core pieces 11 forming the openings 68 and 69.

On the other hand, the vertical piece portions 91 and 92 are connected to the core piece 11 forming the inner space 70 through neck portions 93 and 94 narrower than the vertical piece portions 91 and 92. The width of the neck portions 93 and 94 is about 1/10 to 1/2 of the width of the vertical piece portions 91 and 92. As a result, even if the tips of the blocking pieces 89 and 90 are pressed by the resin, or even if the tips of the blocking pieces 89 and 90 compete somewhat with the iron core piece 11 by pressing, the annular pieces or plan view is obtained. And can be absorbed by the contracted portion 87 bent into an arc shape. In addition, it is good also as a V notch instead of the neck parts 93 and 94, and you may give a V notch to the neck parts 93 and 94 further.

Then, the principal part of the manufacturing method of the laminated core which concerns on the 5th Embodiment of this invention shown in FIG. 9 is demonstrated.
As shown in FIG. 9, the opening portions 96 and 97 of the pair of magnet insertion holes 13 and 14 formed in the iron core piece 11 are provided with inwardly facing hooking piece portions 98 and 99 facing the inside, and the opening portions The closing piece member 100 that constitutes the closing member that closes 96 and 97 has a long plate shape, and on both sides thereof, outwardly facing latching piece parts 101 and 102 that are hooked on the inwardly facing latching piece parts 98 and 99 are provided. Is provided. The blocking piece portions 103 and 104 are formed at both ends of the closing piece member 100 including the outward hooking piece portions 101 and 102.

The inward latching piece portions 98 and 99 and the outward latching piece portions 101 and 102 have a triangular shape in plan view, and are completely separated by punching and push-back processing after punching. During resin sealing, the inwardly engaging pieces 98 and 99 and the outwardly engaging pieces 101 and 102 are engaged with each other by frictional engagement, so that the openings 96 and 97 of the magnet insertion holes 13 and 14 are closed. The stopper pieces 103 and 104 can be completely closed, and after the laminated core 10 is completed, the closing member (that is, the stacked closing piece members 100) can be pushed out in the vertical direction.

Next, a method for manufacturing a laminated core according to the sixth embodiment of the present invention shown in FIGS. 10 (A) to (C) will be described. The openings 17 and 18 are respectively provided inside the magnet insertion holes 13 and 14 in the same manner as in the above embodiment, and the closing piece member 106 disposed in the inner space 15 is cross-shaped in plan view. It has a shape. Then, the end portions 107 and 108 in the radial direction of the closing piece member 106 are subjected to a known half-punching process with the surrounding core piece 11 and punch and die, and are connected at half the thickness to constitute a connecting portion (temporary connecting portion). doing. On the other hand, the circumferential ends 109 and 110 of the closing piece member 106 are separated from the surrounding core pieces 11 by cutting and bending. Then, both circumferential ends 109 and 110 are in contact with both sides of the openings 17 and 18 in a divided state. 111-114 shows the contact part. In addition, you may perform any of a cutting and bending process and a half punching process first.

Thus, when half-cutting of the closing piece member 106 is performed, as shown in FIG. 10C, the concave portion 117 in which the surface 116 of the closing piece member 106 is reduced in half plate thickness with respect to the surface of the iron core piece 11 is formed. Thus, a convex portion 119 is formed in which the bottom surface 118 of the closing piece member 106 protrudes by a half plate thickness.
As a result, the core pieces 11 adjacent to each other can be caulked and joined by fitting the concave portions 117 and the convex portions 119 of the closing piece member 106 in the upper and lower adjacent core pieces 11. Further, the laminated closing piece members 106 are resin-stopped, and after the resin sealing to the magnet insertion holes 13 and 14 is completed, the laminated closing piece members 106 (that is, the closing members) can be removed.

11A and 11B show a method for manufacturing a laminated core according to the seventh embodiment of the present invention. In this embodiment, the closing piece member 121 has a rectangular shape in plan view. Thus, a half-punch structure is formed with respect to the core piece 11, and part of the circumferential end portions 109 and 110 are connected to the core piece 11 by connection portions 111 a to 114 a in a half-pull state.
The closing piece member 121 has a concave portion on the surface 122 and a convex portion on the bottom surface 123, and the concave portion and the convex portion of the closing piece member 121 adjacent to each other in the upper and lower sides are fitted and caulked and joined.

The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention. For example, in the above embodiment, the closing piece member is V-notched, cut, bent, punched and pushed back, punched, and half-punched, so that the closing piece member is temporarily connected to the surrounding core piece. Even if the closing piece member is temporarily connected to the surrounding iron core piece by other methods, it can be applied as long as the laminated body (that is, the closing member) of the closing piece member can be finally removed.
Moreover, in the said embodiment, although the obstruction | occlusion piece member was made into cyclic | annular form, the cross shape, or the rectangular shape, it is not limited to this shape. Further, the position at which the closing piece member is temporarily connected to the surrounding iron core piece is not limited and is arbitrary.
The laminated closing piece member (closing member) can be pressed and removed by pressing with a pin member after resin sealing of the permanent magnet.
Moreover, in the range which does not change the summary of this invention, a closing member can also be comprised combining above-described embodiment.
Moreover, in the said embodiment, it is preferable that the protrusion length of the half piece obstruction | occlusion piece member shall be 0.5 to 0.9 times (more preferably, 0.6 to 0.85 times) thickness. .

10: laminated core, 10a: laminated core body, 11: core piece, 12: shaft hole, 13, 14: magnet insertion hole, 15: inner space, 17, 18: opening, 20, 21: permanent magnet, 23: Closing member, 24, 25: Dovetail groove, 26, 27: Protruding part, 29, 30: Circumferential side part, 32: Closing piece member, 33-36: Punching hole, 38: Punch, 39: Die, 40, 41: Flat punch, 43-46: Connection part, 47: V notch, 49: Closure piece member, 50-53: Projection part, 55: Laminated core body, 56, 57: Magnet insertion hole, 58, 59: Opening Part, 60: outer space part, 61: closing member, 62: blocking piece member, 63: iron core piece, 64: central connecting part, 65, 66: side connecting part, 68, 69: opening, 70: inner space , 71: blocking member, 71a: blocking piece member, 72, 73: blocking piece portion, 74 75: Vertical piece part, 76, 77: Shrink part, 78, 79: Neck part, 80: Plate material, 81: Punch, 82: Die, 83: Punched piece, 84: Punched hole, 86: Blocking piece member, 87: Contraction part, 89, 90: Blocking piece part, 91, 92: Vertical piece part, 93, 94: Neck part, 96, 97: Opening part, 98, 99: Inward latching piece part, 100: Blocking piece Members, 101, 102: outward latching pieces, 103, 104: blocking pieces, 106: blocking piece members, 107, 108: radial ends, 109, 110: circumferential ends, 111- 114: contact portion, 111a to 114a: connecting portion, 116: surface, 117: concave portion, 118: bottom surface, 119: convex portion, 121: blocking piece member, 122: surface, 123: bottom surface

Claims (5)

A plurality of iron core pieces are laminated and have a pair of magnet insertion holes, and an inner space portion communicating with the magnet insertion hole via an opening is formed at the center side of the pair of magnet insertion holes. provided, or the and a permanent magnet inserted in the magnet insertion holes of the laminated core body with an outer space which is opened to the outside communicated with through the opening in the magnet insertion holes, the opening in the closure member In the closed state, in the manufacturing method of the laminated core in which the permanent magnet is resin-sealed in the magnet insertion hole,
A part or all of the outer periphery of the closing piece member forming the closing member is frictionally held on the iron core piece around it, and the permanent magnet is resin-inserted into the magnet insertion hole of the laminated core body assembled with the iron core piece. After sealing, the said closure member is removed, The manufacturing method of the laminated iron core characterized by the above-mentioned. A plurality of iron core pieces are laminated and have a pair of magnet insertion holes, and an inner space portion communicating with the magnet insertion hole via an opening is formed at the center side of the pair of magnet insertion holes. provided, or the and a permanent magnet inserted in the magnet insertion holes of the laminated core body with an outer space which is opened to the outside communicated with through the opening in the magnet insertion holes, the opening in the closure member In the closed state, in the manufacturing method of the laminated core in which the permanent magnet is resin-sealed in the magnet insertion hole,
The closing piece member forming the closing member is formed by half punching with respect to the iron core piece, and the upper and lower adjacent iron core pieces are connected via the half punching closing piece member to assemble the iron core piece. A method of manufacturing a laminated core, comprising: sealing the permanent magnet in the magnet insertion hole of the laminated core body with resin and then removing the closing member. A plurality of iron core pieces are laminated and have a pair of magnet insertion holes, and an inner space portion communicating with the magnet insertion hole via an opening is formed at the center side of the pair of magnet insertion holes. In a manufacturing method of a laminated core in which a permanent magnet is inserted into the magnet insertion hole of the provided laminated core body and the opening is closed with a closing member, and the permanent magnet is resin-sealed in the magnet insertion hole.
The closing piece member forming the closing member includes an abutting portion in contact with the iron core piece at both edges of the opening, and a connecting portion partially connected to the iron core piece by V notch, half punching or constriction. A method of manufacturing a laminated core, comprising: sealing the permanent magnet into the magnet insertion hole of the laminated core body having the core pieces assembled, and removing the closing member. The method for manufacturing a laminated core according to any one of claims 1 to 3 , wherein the closing piece member is provided with a caulking portion so that the closing piece members adjacent in the vertical direction can be caulked and laminated. A method for producing a laminated iron core characterized by: The method of manufacturing a laminated core according to any one of claims 1-4, after the permanent magnet in the magnet insertion hole sealed with resin, punching removed or pin with a punch stacked the closure piece member A method for producing a laminated iron core, characterized by pressurizing and removing by pressing with a member.

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