JP6659018B2 - Laminate, rotating machine, lamination method, and laminate manufacturing method - Google Patents

Description

  The present invention relates to a laminating technique for laminating a plurality of plate members, and more particularly to a technique capable of appropriately caulking and laminating a plurality of plate members while enabling cutting by laser.

The stator, the rotor, and the like of the rotating machine are configured by a laminate in which plate members are laminated. In such a laminate, the laminated plate members are shifted only by laminating the plate members, and therefore, it is necessary to fix the laminated plate members.
Conventionally, as a method of fixing the laminated plate members, a method of caulking and laminating using a caulking projection is generally used. For example, when forming a plate-shaped member by punching an electromagnetic steel plate or the like into a predetermined shape using a mold, a caulking projection is formed on the plate-shaped member. The caulking protrusion is formed by pressing a central portion of the caulking protrusion forming region of the plate-like member from one side along the thickness direction to the other side, and protruding from the other surface along the thickness direction. Is done. At this time, a crimping concave portion is formed by one surface of the crimping protrusion forming region along the thickness direction. That is, when forming the swaging protrusion, the swaging recess is also formed. Then, by press-fitting or the like, the caulking protrusion formed on one plate-like member is fitted into the caulking recess formed on the other plate-like member, thereby stacking the plurality of plate-like members while fixing them.
Here, in order to form a plate-shaped member by punching out an electromagnetic steel plate or the like, an expensive mold is required.
Therefore, in order to eliminate the need for an expensive mold, a method of cutting a magnetic steel sheet or the like with a laser to form a plate-like member has been considered. For example, by using a laser, a cutting line is formed along a part of the outer peripheral edge of the caulking protrusion forming region, and then the central portion of the caulking protrusion forming region is pressed from one side along the thickness direction to the other side. Then, a caulking projection is formed on the other side along the thickness direction by projecting from the other surface along the thickness direction, and a caulking recess is formed on one side along the thickness direction.
However, when a cutting line is formed along a part of the outer peripheral edge of the caulking projection forming region by a laser, a cutting line having a width of about 0.1 mm is formed. For this reason, when a cutting line is formed by a laser along a part of the outer peripheral edge of the caulking protrusion forming region, and then the center portion of the caulking protrusion is pressed to form the caulking protrusion, the width of the caulking protrusion is reduced. , The width of the opening of the crimping recess is smaller. In this case, the caulking protrusion formed on one plate-like member cannot be engaged with the caulking recess formed on the other plate-like member, so that the laminated plate-like members cannot be firmly fixed.
Therefore, when a laminated body is formed by laminating plate members formed by cutting an electromagnetic steel plate or the like with a laser, a method of fixing a plurality of laminated plate members is disclosed in, for example, Patent Document 1. A method of welding a plurality of plate members as described above is used.

JP 2013-219947 A

When a method of welding a plurality of plate-like members is used as a method of fixing a plurality of stacked plate-like members, thermal distortion or the like due to welding occurs, so there is a limit in increasing the dimensional accuracy of the laminate. is there.
The present invention has been made in view of such a point, and an object of the present invention is to provide a technique capable of appropriately caulking and laminating a plurality of plate members while enabling cutting by laser.

The first invention relates to a laminate in which a plurality of plate members are laminated.
In the laminate of the present invention, the crimping protrusion formed on the second plate-like member is press-fitted into the crimped concave portion formed on the first plate-like member of the two plate-like members to be laminated. It is formed by fitting and caulking and laminating.
The first plate-shaped member has a through hole communicating with both sides along the thickness direction and used as a crimping recess into which the crimping protrusion is fitted. The first plate-shaped member is preferably formed by cutting an electromagnetic steel plate or the like with a laser. The through-hole is preferably formed by cutting the through-hole forming region of the first plate-shaped member with a laser.
The second plate-shaped member has an opening on one surface along the thickness direction. The caulking protrusion is connected to a part of the opening formed in the second plate-shaped member, and protrudes from the other surface of the second plate-shaped member along the thickness direction. I have. In the present invention, the width of the caulking protrusion is smaller than the width of the opening, and the width of the caulking recess is smaller than the width of the caulking protrusion. The second plate-shaped member is preferably formed by cutting an electromagnetic steel plate or the like with a laser. Preferably, the caulking protrusion is formed by a laser to form a cutting line along a part of the outer peripheral edge of the caulking protrusion forming region of the second plate-like member, and the caulking protrusion having the cutting line formed thereon. The formation region is formed by pressing from one side along the thickness direction to the other side and projecting from the surface on the other side along the thickness direction. The projecting length of the caulking projection from the other surface along the thickness direction of the second plate-like member is longer than the thickness of the first plate-like member, and preferably the second plate-like member Is set to a length of about two to three times the thickness of Preferably, the thickness of the first plate member is equal to the thickness of the second plate member.
The width of the caulking protrusion and the width of the caulking recess represent the distance between the outer peripheral surface of the caulking protrusion and the inner peripheral surface of the caulking recess when the caulking protrusion is fitted into the caulking recess. The shape of the swaging protrusion and the swaging recess is set to an appropriate shape such that the swaging protrusion and the swaging recess engage with each other by fitting the swaging protrusion into the swaging recess.
In the present invention, a caulking protrusion is formed on the first plate-like member of the two plate-like members to be laminated, and the second plate-like member is formed as a caulking recess into which the caulking protrusion is fitted. Since the through-holes communicating the both sides along the width direction are formed, the first plate member and the second plate member can be appropriately caulked and laminated while enabling cutting by laser. Thereby, a laminated body can be easily formed without using a mold or the like.
In a different embodiment of the first invention, the caulking projection has a V-shape, and the caulking recess has a square cross section. The V-shaped caulking protrusion is preferably formed by bending a rectangular caulking protrusion forming region using a line connecting the central portions of the opposed long sides as a folding line. The cross section of the caulking recess is preferably formed in a rectangular shape.
In the present embodiment, the swaging protrusion and the swaging recess can be securely engaged with a simple configuration.
In another different embodiment of the first invention, a caulking projection is formed on the first plate-like member together with the caulking concave portion, and a caulking recess is formed on the second plate-like member together with the caulking protruding portion. . The caulking protrusion and the caulking recess of the second plate-like member are formed at a portion of the first plate-shaped member opposite to the portion where the caulking recess and the caulking protrusion are formed. That is, the first plate-shaped member and the second plate-shaped member are alternately formed with a crimping projection and a crimping recess.
In the present embodiment, a plurality of plate members can be easily and reliably stacked. In addition, since the first plate-like member and the second plate-like member to be stacked are formed with the swaging protrusions and the swaging recesses alternately, it is possible to form a stacked body having a good load balance.
The second invention relates to a rotating machine.
The rotating machine of the present invention includes a stator and a rotor rotatably disposed on the stator with a gap therebetween. The stator and the rotor are configured by a laminate in which a plurality of plate members are laminated. Then, any one of the above-described laminates is used as a laminate of at least one of the stator and the rotor. The rotating machine of the present invention can be configured as an electric motor or a generator.
Regarding the laminated body constituting the stator, the caulking protrusion and the caulking recess are preferably formed at a position corresponding to the teeth portion or a circumferentially central portion between the teeth portions circumferentially adjacent to each other. You. Further, with respect to the laminated body constituting the rotor, the swaging protrusion and the swaging recess are preferably located near the d-axis of the main magnetic pole or near the q-axis of the auxiliary magnetic pole and at a location on the outer peripheral side of the rotor. Formed.
The rotating machine of the present invention has the same effects as the above-described laminate.
The third invention relates to a laminating method for laminating a first plate member and a second plate member.
The present invention includes a caulking concave portion forming step, a cutting line forming step, a caulking protrusion forming step, and a laminating step.
In the caulking concave portion forming step, a through-hole is formed in the first plate-shaped member so as to communicate with both surfaces along the thickness direction. The through-hole is used as a crimping recess into which the crimping protrusion is fitted. Preferably, the through-hole is formed by cutting the crimped concave portion forming region of the first plate-shaped member with a laser.
In the cutting line forming step, a cutting line is formed on the second plate-like member by a laser along a part of the outer peripheral edge of the caulking protrusion forming region. Preferably, a cutting line is formed along the long side of the caulking projection forming region having a rectangular shape.
In the caulking protrusion forming step, a pressing force is applied from one side along the thickness direction to the other side in the thickness direction with respect to the caulking protrusion forming region of the second plate-shaped member on which the cutting line is formed. Of the plate-like member is formed to protrude from the other surface along the thickness direction. Preferably, the portion along the line connecting the central portions of the opposing long sides of the caulking projection forming region having a rectangular shape is pressed from one side along the thickness direction to the other side, and in the thickness direction. Along the other side. Here, when a cutting line along a part of the outer peripheral edge of the caulking protrusion forming region is formed by a laser, the width of the caulking protrusion is smaller than the width of the caulking protrusion forming region.
In the laminating step, the first plate-shaped member and the second plate-shaped member are fitted by press-fitting or the like into the crimped concave portion formed in the first plate-shaped member. The plate members are laminated.
According to the present invention, the first plate-shaped member and the second plate-shaped member can be appropriately caulked and laminated while enabling cutting by laser.
The fourth invention relates to a laminate manufacturing method for manufacturing a laminate composed of a plurality of laminated plate members.
The present invention includes a caulking concave portion forming step, a cutting line forming step, a caulking protrusion forming step, and a laminating step.
In the caulking concave portion forming step, a through hole is formed in the plate-shaped member, the through-hole communicating between both surfaces along the thickness direction of the plate-shaped member. The through-hole is used as a crimping recess into which the crimping protrusion is fitted. Preferably, the through-hole is formed by cutting the crimped concave portion forming region of the plate-like member with a laser.
In the cutting line forming step, a cutting line is formed on the plate-shaped member by a laser along a part of the outer peripheral edge of the caulking protrusion forming region. Preferably, a cutting line is formed along the long side of the caulking projection forming region having a rectangular shape.
In the caulking protrusion forming step, a pressing force is applied from one side along the thickness direction of the plate-like member to the other side, with respect to the caulking protrusion forming region of the plate-like member on which the cutting line is formed, A caulking projection is formed to protrude from the other surface along the thickness direction of the shaped member. Preferably, the portion along the line connecting the central portions of the opposing long sides of the caulking projection forming region having a rectangular shape is pressed from one side along the thickness direction to the other side, and in the thickness direction. Along the other side.
In the laminating step, a plurality of plate members are laminated.
In the present invention, the first to third plate members are formed by performing the crimping concave portion forming step, the cutting line forming step, and the crimping protrusion forming step on the first to third plate members. A crimping recess and a crimping protrusion are formed. Preferably, the caulking protrusion and the caulking recess are formed such that the arrangement positions of the caulking protrusion and the caulking recess in the one plate-like member and the other plate-like member to be laminated are alternated. In the laminating step, the caulking projection formed on the second plate member is fitted into the caulking recess formed on the first plate member, and the caulking formed on the second plate member is formed. The first to third plate members are stacked by fitting the caulking projection formed on the third plate member into the recess.
According to the present invention, it is possible to manufacture a laminate in which a plurality of plate-like members are appropriately caulked and laminated while enabling cutting by a laser.

  According to the present invention, a plurality of plate-like members can be appropriately caulked and laminated while enabling cutting by laser.

It is a figure explaining operation | movement which forms a cutting line along a part of outer peripheral edge of a crimping protrusion formation area with a laser. It is a figure explaining the operation | movement which presses the crimping protrusion formation area in which the cutting line was formed, and forms a crimping protrusion. FIG. 3 is a sectional view taken along line III-III of FIG. 2. FIG. 4 is a sectional view taken along line IV-IV of FIG. 2. It is a figure showing a crimping crevice. It is a figure explaining the operation | movement which fits a crimping protrusion to a crimping recessed part. It is a figure showing the schematic structure of one embodiment of the rotating machine of the present invention. FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7. It is a figure explaining the outline of the caulking lamination method of the tabular member used in one embodiment of a rotating machine. It is a figure explaining one embodiment of the stator which constitutes one embodiment of a rotating machine. It is a figure explaining other embodiments of the stator which constitutes one embodiment of a rotating machine. It is a figure explaining one embodiment of a rotor which constitutes one embodiment of a rotating machine. It is a figure explaining other embodiments of the rotor which constitutes one embodiment of a rotating machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this specification, the term "axial direction" indicates the direction of a rotation center line passing through the rotation center of the rotor (rotation axis) when the rotor is rotatably arranged with respect to the stator. The term "circumferential direction" indicates a circumferential direction around the center of rotation when viewed in a cross section perpendicular to the axial direction in a state where the rotor is rotatably arranged with respect to the stator. The term “radial direction” indicates a direction passing through the center of rotation when viewed in a cross section perpendicular to the axial direction in a state where the rotor is rotatably arranged with respect to the stator.

First, an outline of the present invention will be described with reference to FIGS.
FIG. 1 is a diagram illustrating a cutting line forming step of forming a cutting line along a part of an outer peripheral edge of a swaging portion forming region of a first plate-shaped member by a laser, and FIG. It is a figure explaining the crimping protrusion formation process which presses a crimping protrusion formation area and forms a crimping protrusion. FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV of FIG. FIG. 5 is a diagram illustrating a caulking recess forming step of forming a caulking recess in the second plate-shaped member. FIG. 6 is a diagram illustrating a laminating step of laminating the first plate-shaped member and the second plate-shaped member.
Further, in the embodiment described below, a plate-shaped member having a thickness D formed of a soft magnetic material such as an electromagnetic steel sheet is used to describe a laminated body constituting a stator or a rotor of a rotating machine. Have been.

First, the cutting line forming step will be described with reference to FIG.
Cutting lines 21 and 22 are formed along a part of the outer peripheral edge of the caulking projection forming region 10 of the first plate member A of one of the two plate members to be laminated. The shape of the caulking protrusion forming region 10 can be set to an appropriate shape. In FIG. 1, a caulking projection forming region 10 having a rectangular shape with a long side length L and a short side length W1 is set. Then, cutting lines 21 and 22 are formed along opposing long sides of the rectangular caulking projection forming region 10.
In the present invention, the cutting lines 21 and 22 are formed by a laser.
Here, when the cutting lines 21 and 22 are formed by a laser, the width s of the cutting lines 21 and 22 is about 0.1 mm. That is, the width W2 of the caulking projection forming region 10 after the cutting lines 21 and 22 are formed along the long sides facing each other by the laser is larger than the width W1 before the cutting lines 21 and 22 are formed. It becomes narrower (shorter) by the width s of 21 and 22 and becomes [W2 = W1-2 × s].

Next, the caulking projection forming step will be described with reference to FIGS.
In the state where the cutting lines 21 and 22 are formed, the crimping protrusion forming region 10 is moved from one side to the other side along the thickness direction of the first plate-shaped member A by using the bend punch 30 (see FIG. 2). From the upper side to the lower side). Since the bend punch 30 has a triangular protrusion having contact surfaces 31 and 32, the swaging protrusion forming region 10 is pressed by the contact surfaces 31 and 32 of the bend punch 30.
As a result, the crimping protrusion forming region 10 is bent at the fold lines 40A, 40B, and 40C, and the V-shaped crimping protrusion 40 including the protrusion forming pieces 41 and 42 on both sides of the fold line 40C is formed. . The protrusion forming pieces 41 and 42 have protrusion forming surfaces 41a and 42a, recess forming surfaces 41b and 42b, side surfaces 41c and 41d, and 42c and 42d. The protruding surfaces of the caulking protruding portions 40 are formed by the protruding portion forming surfaces 41a and 42a, and the concave portions 40a are formed by the concave forming surfaces 41b and 42b.
The caulking projection forming region 10 is pressed from one side to the other side along the thickness direction of the first plate member A, so that the first plate member A extends in the thickness direction. An opening 10a is formed on one side. The opening 10a is formed by walls 21a and 22a formed by cutting lines 21 and 22, and folding lines 40A and 40B. The opening 10a communicates with the recess 40a. That is, the caulking protrusion 40 is continuously provided to the opening 10a at the fold lines 40A and 40B.
As shown in FIG. 2, the protrusion forming surfaces 41 a and 42 a of the protrusion forming pieces 41 and 42 forming the caulking protrusion 40 are the other of the first plate-shaped member A along the thickness direction. The recessed surfaces 41b and 42b are connected to one surface of the first plate-shaped member A along the thickness direction. That is, the opening 10a and the concave portion 40a do not correspond to the “through hole that communicates the two sides of the plate member along the thickness direction” of the present invention.
Here, as described above, since the cutting lines 21 and 22 are formed by the laser, as shown in FIG. 3, the width W2 of the caulking protrusion 40 is equal to the width of the opening 10a (the width of the wall 21a). The distance between the cutting lines 21 and 22 is smaller (shorter) than the width W1 (interval between 22a).
The caulking protrusion 40 is fitted into a caulking recess 50 of the other second plate-shaped member B described later by press fitting or the like. For this reason, the protruding length T of the caulking protrusion 40 (the length of the first plate-shaped member A protruding from the other surface along the thickness direction) T is the length at which the caulking recess 50 is formed. The thickness is set to be longer than the thickness D of the second plate-shaped member B. Preferably, the thickness is set to about 2 to 3 times the thickness D. Preferably, the first plate-shaped member A and the second plate-shaped member B to be laminated are formed of an electromagnetic steel plate having the same thickness. That is, the thickness of the first plate member A and the thickness of the second plate member B are set to be equal.

Next, the caulking concave portion forming step will be described with reference to FIG.
The crimping concave portion forming region of the other second plate member B of the two plate members to be laminated is cut to form the crimp concave portion 50. As a result, the caulking concave portion 50 is formed as a through hole that communicates both surfaces of the second plate-shaped member B along the thickness direction. The shape of the caulking recess forming region is formed in an appropriate shape that can be engaged with the caulking protrusion 40. The caulking protrusion 40 shown in FIG. 2 is formed in a V-shape by pressing the rectangular caulking protrusion forming region 10, so that the caulking recess forming region shown in FIG. , The length (width) of the short side is set to a rectangular shape of W3. The length W3 of the short side of the caulking recess forming region is set slightly smaller than the width W2 of the caulking protrusion 40. Thereby, the swaging protrusion 40 is fitted into the swaging recess 50 by press fitting or the like.
The caulking concave portion 50 corresponds to the “through hole communicating with both sides of the plate-shaped member along the thickness direction” of the present invention.
In the present invention, the crimped concave portion 50 is formed by cutting the crimped concave portion forming region of the second plate-shaped member B with a laser. When cutting the crimped concave portion forming region by laser, the cutting is performed in consideration of the fact that the cutting line by laser has a width.

Next, the laminating step will be described with reference to FIG.
When laminating the first plate-shaped member A and the second plate-shaped member B, the swaged recess 50 formed in the second plate-shaped member B is inserted into the swaged recess 50 formed in the first plate-shaped member A. The protrusion 40 is fitted by press fitting or the like. Thereby, the side walls 41c, 41d and 42c, 42d of the protrusion forming pieces 41 and 42 forming the caulking protrusion 40 are engaged with the side walls 50a and 50b forming the caulking recess 50, and the first plate-like member A and The second plate-shaped members B are stacked in a fixed state.

An embodiment of the rotating machine of the present invention will be described with reference to FIGS. FIG. 7 is a diagram showing a schematic configuration of the permanent magnet electric motor 100, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
The permanent magnet motor 100 includes a stator 110 and a rotor 150 rotatably arranged with respect to the stator 110.

The stator 110 is constituted by a stator core 120 made of a laminate in which a plurality of plate members are laminated. Preferably, the plate member is formed by cutting an electromagnetic steel plate or the like with a laser. A crimping protrusion 130 and a crimping recess 140 are formed in a plate-like member constituting the stator core 120. The plurality of plate members are stacked by crimping by fitting the crimping protrusion 130 of one plate member into the crimp recess 140 of the other plate member. The method of caulking and laminating the plate members will be described later.
As shown in FIG. 8, the stator core 120 includes a yoke 121 extending along the circumferential direction when viewed in a cross section perpendicular to the axial direction, and a rotation center O side along the radial direction from the yoke 121. Have teeth 122 extending therethrough. The teeth 122 are formed by a tooth base 123 extending in the radial direction and a tooth tip 124 that is provided continuously on the rotation center O side of the tooth base 123 and extends in the circumferential direction. On the rotation center O side of the tooth tip 124, a tooth tip surface 124a is formed. The tooth tip surface 124a corresponds to the inner peripheral surface of the stator 110 (stator core 120).
A slot 125 is formed by the teeth 122 adjacent in the circumferential direction. A stator winding 126 is inserted into the slot 125.

The rotor 150 is constituted by a rotor core 160 formed of a laminated body in which a plurality of plate members are laminated. Preferably, the plate member is formed by cutting an electromagnetic steel plate or the like with a laser. A caulking projection 170 and a caulking recess 180 are formed on the plate-like member constituting the rotor core 160. The plurality of plate members are crimped and stacked by fitting the crimp projection 170 of one plate member into the crimp concave portion 180 of the other plate member by press fitting or the like. The method of caulking and laminating the plate members will be described later.
The rotating shaft 165 is inserted into the rotating shaft insertion hole formed by the inner peripheral surface 162 of the rotor core 160 by press fitting or the like.
As shown in FIG. 8, rotor core 160 has main magnetic poles and auxiliary magnetic poles alternately arranged along the circumferential direction when viewed in a cross section perpendicular to the axial direction.
A magnet insertion hole 163 is formed in each main magnetic pole, and a permanent magnet 164 is inserted into the magnet insertion hole 163. The magnet insertion hole 163 extends in a direction intersecting with the d-axis of the main magnetic pole (a line connecting the rotation center O and the circumferential center of the main magnetic pole). The shape, number, arrangement position, and the like of the magnet insertion holes 163 and the permanent magnets 164 can be appropriately changed.

Next, a method of laminating the plate-like members used in the permanent magnet motor 100 of the present embodiment will be described. First, an outline of a method of laminating plate members used in the present embodiment will be described with reference to FIG. FIG. 9 illustrates an operation of stacking the first plate members E1 and E2 and the second plate members F1 and F2.
A caulking projection 40 and a caulking recess 50 are formed on each of the first plate members E1 and E2 and the second plate members F1 and F2. The method described above (FIGS. 1 to 4) can be used as a method for forming the swaging protrusion 40 and the swaging recess 50.
In the present embodiment, the first plate-like members E1 and E2 and the second plate-like members F1 and F2 are alternately formed with a swaging protrusion 40 and a swaging recess 50. That is, the second plate-like members F1 and F2 are provided at the positions corresponding to the positions where the swaging protrusions 40 and the swaging recesses 50 of the first plate-like members E1 and E2 are formed. A part 40 is formed.

The first plate members (E1, E2) and the second plate members (F1, F2) are stacked as follows.
First, the crimping protrusion 40 formed on the second plate-shaped member (F) is fitted into the crimped concave portion 50 formed on the first plate-shaped member (E1) by press-fitting or the like. The second plate member (F1) is laminated on the first plate member (E1).
Next, the crimping projection 40 formed on the first plate-shaped member (E2) is fitted into the crimped concave portion 50 formed on the second plate-shaped member (F1) by press-fitting or the like. The first plate member (E2) is laminated on the second plate member (F1).
Next, the caulking protrusion 40 formed on the second plate-like member (F2) is fitted into the crimping concave portion 50 formed on the first plate-like member (E2) by press-fitting or the like. The second plate member (F2) is laminated on the first plate member (E2).
Thus, the first plate-like members (E1, E2) and the second plate-like members (F1, F2) are stacked in a fixed state. Further, the disposition positions of the crimping protrusion 40 and the crimping recess 50 in one of the two plate-like members to be laminated (for example, the first plate-like members (E1, E2)) are different from those of the other plate-like members. Since the staking protrusions 40 and the staking recesses 50 in the plate-like members (for example, the second plate-like members (F1, F2)) are disposed alternately, a laminated body having a good load balance can be formed. it can.

Next, a first embodiment of the stator core 120 composed of a laminated body in which a plurality of plate members are laminated will be described with reference to FIG. FIG. 10 shows a state in which the first plate members (120K1, 120K2) and the second plate members (120L1) are stacked.
The first plate-like member (120K1, 120K2) and the second plate-like member (120L1) are formed with a caulking protrusion 130 and a caulking recess 140.
In the present embodiment, a caulking protrusion 40 having a V-shape shown in FIG. 2 is used as the caulking protrusion 130, and a caulking recess 140 having a rectangular cross section shown in FIG. A recess 50 is used.
Further, in the present embodiment, the swaging protrusion 130 and the swaging recess 140 are formed at positions corresponding to the yoke 121 and at positions corresponding to the teeth 122 of each plate-like member (120K1, 120K2, 120L1). I have. Further, the swaging protrusion 130 and the swaging recess 140 are formed at positions aligned along the circumferential direction so as to extend along the circumferential direction.
In the first plate-like member (120K1, 120K2) and the second plate-like member (120L1), the arrangement positions of the crimping protrusion 130 and the crimping recess 140 are alternately arranged.
By forming the caulking protrusion 130 and the caulking recess 140 at a location corresponding to the yoke 121 and corresponding to the teeth 122 so as to extend in the circumferential direction, the caulking protrusion 130 and the caulking recess 140 are formed. Due to the presence of 140, a decrease in magnetic flux flowing through teeth 122 can be suppressed.

A second embodiment of the stator core 120 will be described with reference to FIG. FIG. 11 shows a state where the first plate members (120M1 and 120M2) and the second plate members (120N1) are stacked.
The first plate-like member (120M1, 120M2) and the second plate-like member (120N1) are formed with a caulking protrusion 130 and a caulking recess 140.
This embodiment is different from the embodiment shown in FIG. 10 in the arrangement positions of the swaging protrusion 130 and the swaging recess 140. That is, the caulking protrusion 130 and the caulking recess 140 correspond to the yoke 121 of each plate-like member (120M1, 120M2, 120N1), and are located at the center in the circumferential direction between the teeth 122 adjacent in the circumferential direction. Is formed. Further, the swaging protrusion 130 and the swaging recess 140 are formed at positions aligned along the circumferential direction so as to extend along the circumferential direction.
In the first plate-like member (120M1, 120M2) and the second plate-like member (120N1), the disposing positions of the crimping protrusion 130 and the crimping recess 140 are alternately arranged.
The caulking protrusion 130 and the caulking recess 140 are formed at a location corresponding to the yoke 121 and at a center in the circumferential direction between the teeth 122 adjacent in the circumferential direction so as to extend along the circumferential direction. Accordingly, the plurality of plate members can be reliably fixed while suppressing a decrease in the magnetic flux flowing through the yoke 121 due to the presence of the caulking protrusion 130 and the caulking recess 140.

Next, a first embodiment of a rotor core 160 composed of a laminated body in which a plurality of plate members are laminated will be described with reference to FIG. FIG. 12 shows a state where the first plate members (160P1, 160P2) and the second plate member (160Q1) are stacked.
The first plate-like member (160P1, 160P2) and the second plate-like member (160Q1) are formed with a caulking projection 170 and a caulking recess 180.
In this embodiment, the V-shaped caulking protrusion 40 shown in FIG. 2 is used as the caulking protrusion 170, and the caulking recess 180 has a rectangular cross-section shown in FIG. A recess 50 is used.
In the present embodiment, the caulking protrusion 170 and the caulking recess 180 are located near the d-axis (preferably intersecting with the d-axis) of each plate member (160P1, 160P2, 160Q1). It is formed on the outer peripheral side (preferably, on the outer peripheral side from the magnet insertion hole 163). Further, the caulking protrusion 170 and the caulking recess 180 are formed at positions arranged along the radial direction so as to extend along the radial direction.
In the first plate-like member (160P1, 160P2) and the second plate-like member (160Q1), the disposition positions of the crimping projection 170 and the crimping concave portion 180 are alternated.
When the caulking protrusion 170 and the caulking recess 180 are formed so as to extend in the radial direction at a position near the d-axis and on the outer peripheral side, the presence of the caulking protrusion 170 and the caulking recess 180 Since the magnetic flux contributing to the reluctance torque hardly flows, the reluctance torque decreases. On the other hand, the presence of the caulking protrusion 170 and the caulking recess 180 makes it difficult for the magnetic flux contributing to the magnet torque to escape, thereby increasing the magnet torque. As a result, the energization lead angle is reduced, the power factor is increased, and the efficiency is improved.

A second embodiment of the rotor core 160 will be described with reference to FIG. FIG. 13 shows a state where the first plate-like members (160R1, 160R2) and the second plate-like member (160S1) are stacked.
The first plate-like member (160R1, 160R2) and the second plate-like member (160S1) are formed with a caulking projection 170 and a caulking recess 180.
This embodiment is different from the embodiment shown in FIG. 12 in the arrangement positions of the swaging protrusion 170 and the swaging recess 180. In other words, the swaging protrusion 170 and the swaging recess 180 are formed near the q-axis (preferably crossing the q-axis) connecting the rotation center O and the circumferential center of the auxiliary magnetic pole, and are formed at the outer circumferential side. Have been. Further, the caulking protrusion 170 and the caulking recess 180 are formed at positions arranged along the radial direction so as to extend along the radial direction.
In the first plate-like member (160R1, 160R2) and the second plate-like member (160S1), the disposition positions of the crimping protrusion 170 and the crimping concave portion 180 are alternated.
When the caulking protrusion 170 and the caulking recess 180 are formed so as to extend in the radial direction at a location near the q axis and on the outer peripheral side, the caulking protrusion 170 and the caulking recess 180 are present. , The magnetic flux of the magnet short-circuited via the q-axis becomes difficult to flow. Thereby, the magnetic flux of the magnet short-circuited via the q-axis decreases, and the magnet torque increases.

The caulking protrusion 170 and the caulking recess 180 can be formed both at a position near the d-axis and at a position near the q-axis.
In this case, the strength of the rotor core 160 can be increased, and generation of vibration and noise can be suppressed.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions can be made without departing from the spirit of the present invention.
In the embodiment, a crimping protrusion having a V-shape formed by pressing a portion connecting the central portions of opposed long sides of a crimping protrusion forming region having a rectangular shape, and a crimping recess having a rectangular cross section However, the shape of the swaging protrusion and the swaging recess is not limited to this.
The first plate-like member and the second plate-like member to be laminated are provided with a caulking protrusion and a crimping recess, and the disposition positions of the caulking protrusion and the caulking recess are the first plate-like member and the second plate-like member. However, the disposition positions of the crimping concave portion and the crimping protrusion can be appropriately set. In addition, it is only necessary that at least one of the stacked first plate-like members has a caulking protrusion and the other second plate-like member has a caulking recess.
The number, arrangement position, arrangement direction, and the like of the caulking protrusions and caulking recesses in the plate-like members constituting the stator core and the rotor core can be appropriately changed.
The present invention can also be configured as a laminating method for laminating the first plate member and the second plate member.
The present invention can also be configured as a laminate manufacturing method for manufacturing a laminate in which a plurality of plate members are stacked.
In the embodiment, the permanent magnet motor has been described. However, the present invention can be configured as various motors other than the permanent magnet motor, and further, can be configured as a rotating machine other than the motor, for example, a generator.
Each configuration described in the embodiment can be used alone, or a plurality of appropriately selected configurations can be used in combination.

10 Caulking Projection Forming Area 10a Opening 21, 22 Cutting Line 21a, 22a Wall 30 Bend Punch 31, 32 Contact Surface 40 Caulking Projection 40a Recess 40A, 40B, 40C Bending Line 41, 42 Projection Forming Piece 41a, 42a Protrusion forming surfaces 41b, 42b Recess forming surfaces 41c, 41d, 42c, 42d Side surface 50 Through-hole (caulking recess)
50a, 50b, 50c, 50d Wall part 100 Permanent magnet motor 110 Stator 120 Stator core 120K1, 120L1, 120K2, 120M1, 120N1, 120M2 Plate member 121 Yoke 122 Teeth part 123 Teeth base 124 Teeth tip 124a Teeth tip 125 slot 130 swaging protrusion 140 through hole (swaging recess)
126 Stator winding 150 Rotor 160 Rotor core 160P1, 160Q1, 160P2, 160R1, 160S1, 160R2 Plate member 161 Outer peripheral surface 162 Inner peripheral surface 163 Magnet insertion hole 164 Permanent magnet 165 Rotating shaft 170 Caulking protrusion 180 Through hole (Crimping recess)

Claims (6)

It is constituted by a plurality of laminated plate members, and a second one of the two laminated plate members is formed in a caulking recess formed in the first plate member of the two laminated plate members. A laminate in which a caulking convex portion formed on the plate-shaped member is fitted,
The caulking recess is a through-hole that communicates both surfaces along the thickness direction of the first plate-shaped member,
The second plate-shaped member has an opening on one surface along the thickness direction,
The caulking protrusion is connected to the opening formed in the second plate-shaped member, and protrudes from the other surface along the thickness direction of the second plate-shaped member. ,
The width of the caulking protrusion is smaller than the width of the opening ,
The width of the crimped concave portion is smaller than the width of the crimped protrusion . The laminate according to claim 1, wherein
The caulking protrusion has a V-shape,
The laminated body, wherein the caulking recess has a square cross section. The laminate according to claim 1 or 2 ,
The first plate-shaped member is formed with the caulking recess and the caulking protrusion,
In the second plate-shaped member, the caulking protrusion and the caulking recess are formed at locations of the first plate-shaped member opposite to the locations where the caulking recess and the caulking projection are formed, respectively. A laminate. A stator, including a rotor disposed via a gap in the stator, the stator and the rotor is a rotating machine configured by a laminate of a plurality of plate-like members laminated,
A rotating machine, wherein at least one of the stator and the rotor is configured by the laminate according to any one of claims 1 to 3 . A laminating method for laminating a first plate member and a second plate member,
Relative to the first plate member, and caulking the recess forming step of forming a through hole communicating the both surfaces in the thickness direction of the first plate-like member as a caulking recess,
For the second plate-shaped member, a cutting line forming step of forming a cutting line along a part of the outer peripheral edge of the caulking protrusion forming region by laser.
Applying a pressing force from one side along the thickness direction of the second plate-shaped member to the other side, with respect to the crimping protrusion forming region of the second plate-shaped member where the cutting line is formed. A caulking protrusion forming step of forming a caulking protrusion protruding from the other surface along the thickness direction of the second plate-like member;
The first plate-shaped member and the second plate are fitted by fitting the caulked protrusion formed on the second plate-shaped member into the crimped concave portion formed on the first plate-shaped member. A laminating method, comprising a laminating step of laminating the shaped members. A laminate production method for producing a laminate composed of a plurality of laminated plate members,
For the plate-like member, a crimping recess forming step of forming a through-hole communicating with both surfaces along the thickness direction of the plate-like member as a caulking recess,
For the plate-shaped member, by laser, a cutting line forming step of forming a cutting line along a part of the outer peripheral edge of the caulking protrusion forming region,
Applying a pressing force from one side along the thickness direction of the plate-shaped member to the other side, with respect to the crimping protrusion forming region of the plate-shaped member where the cutting line is formed, A caulking protrusion forming step of forming a caulking protrusion protruding from the other surface along the thickness direction of,
A laminating step of laminating the plate members,
By performing the caulking concave portion forming step, the cutting line forming step, and the caulking protrusion forming step on the first plate member, the second plate member, and the third plate member to be laminated, Forming the caulking recess and the caulking protrusion in the first plate-shaped member, the second plate-shaped member, and the third plate-shaped member;
In the laminating step, the caulking protrusion formed on the second plate-like member is fitted into the caulking recess formed on the first plate-like member. The first plate-shaped member, the second plate-shaped member, and the third plate are fitted by fitting the crimped protrusion formed on the third plate-shaped member into the formed crimped recess. A method for manufacturing a laminate, comprising laminating shape members.

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