JP5234955B2 - Laminated core, rotor and stator - Google Patents

Description

The present invention relates to a laminated core, a rotor, and a stator in which core members that are magnetic plate materials used in motors, generators, and the like are laminated.

  In the conventional method of manufacturing a laminated core, after a desired die-cutting process such as caulking protrusions and caulking concave grooves is applied to the punched-out core sheet, the core sheet is punched out by an outer diameter punch. By being sequentially pulled in, the caulking protrusion of the iron core that has been withdrawn from the caulking concave groove of the iron core that has been withdrawn first is fitted in the press-fitted state and joined by caulking (for example, Patent Documents) 1).

  In addition, a manufacturing apparatus for applying and laminating an adhesive to a core member is shown, and an adhesive application mechanism for applying adhesive in a spot shape on the upper and lower surfaces of a thin steel plate and a predetermined shape by a press molding machine. And a holding mechanism for adhering and fixing the core materials with the adhesive punched into the stack while sequentially storing them (see, for example, Patent Document 2).

  In addition, a method for processing an amorphous metal thin plate using etching technology is shown, and the same processing pattern is processed by etching in parallel with a plurality of amorphous metal strips that are continuously supplied. Then, an adhesive solution is applied to the strip that has been etched and aligned, and then bonded and laminated, and the iron core portion bonded to the strip is separated by a punch with a bonding piece (see, for example, Patent Document 3) .

Japanese Patent No. 3294348 (paragraph numbers [0006] to [0010], FIG. 5 etc.) JP 2001-321850 (paragraph number [0009], FIG. 1 etc.) Japanese Patent Publication No. 7-63211 (pages 2 and 3, FIG. 2, FIG. 3, etc.)

  In recent years, there has been a growing need for energy saving and high efficiency in motor devices, and against this background, the problems of the conventional method for manufacturing a laminated core have been pointed out.

  For example, in the conventional caulking method used as a method for manufacturing a laminated core, uneven portions are formed by press molding on the front and back surfaces of the core member and caulked while being pressed. In addition, there has been a problem that the insulating film pre-coated on the magnetic steel sheet is broken and the lamination is short-circuited. As a result, problems have been pointed out that the magnetic properties of the laminated core deteriorate and prevent the efficiency of motor equipment from being increased.

  In addition, there is a method of fixing the core member with an adhesive, whereby the processing distortion in the vicinity of the unevenness of the core member and the tearing of the insulating film can be suppressed to some extent. However, since the method of forming the contour of the core member itself is press punching, there is a problem that processing distortion occurs in the vicinity of the shear cut surface due to the press, and burrs are generated out of the plane, causing a short circuit between the layers. Further, warpage and burrs due to processing strain during pressing cause deterioration in the assembly accuracy of the laminated core and enlargement of the lamination gap, and there are problems such as noise and vibration generated when the motor is driven.

  Further, there is an etching method as a method for forming the contour of the core member that suppresses the generation of processing distortion and burrs during pressing. However, as in the conventional etching method, when the core member is partially etched and the remaining portion is punched with a press, the punched portion will be out of the plane and each processing Positioning at the time of stacking the pieces is complicated, and there are many unnecessary portions other than the core member, resulting in low productivity.

  In addition, when the entire contour of the core member is etched, each core member is separated separately in the etching process, so that a plurality of core members are transported from the etching process to the stacking process, and positioning is performed at that time. There is a problem that productivity is low.

  As other contour forming methods, laser machining and wire cut electric discharge machining are also conceivable. However, laser machining causes machining degradation near the cut surface, and wire cut electric discharge machining is low in productivity and can only be applied to trial production. There is a problem.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laminated core, a rotor, and a stator that are excellent in magnetic performance without being deteriorated in the vicinity of the cut surface of the core member.

The laminated core of the present invention is a laminated core formed by stacking a plurality of core members which are magnetic plate materials. The surface forming the contour of the core member includes an etching processed surface formed by an etching process and shear cut surfaces scattered at a plurality of locations on the surface forming the contour. And the thickness of the shear cut surface in the thickness direction is thinner than the thickness of the magnetic plate,
The shear cut face has notches on both sides in the contour direction .

The laminated core of the present invention is
A laminated core that is formed by stacking a plurality of core members that are magnetic plates, and a surface that forms an outline of the core member includes an etched surface formed by an etching process and a plurality of surfaces that form the outline consists of a shear cut surface in a scattered locations, the thickness direction of the thickness of the shear cut surface is rather thin than the thickness of the magnetic sheet,
The core member has a circular shape having a substantially circular hole arranged at the center and a plurality of holes arranged at equal intervals in the circumferential direction on the outer peripheral side, and the shear cut surface is a center between adjacent holes. It is arranged on the outermost peripheral surface on the line .

According to the laminated cores of these inventions, since the thickness in the thickness direction of the shear cut surface is smaller than the thickness of the magnetic plate material, no burrs that protrude outside the plate thickness occur in the vicinity of the shear cut surface, thereby preventing a short circuit between the laminates. In addition, the stacking gap can be reduced.

Embodiment 1 FIG.
1 is a structural diagram of a laminated core according to Embodiment 1 of the present invention. 1A is a perspective view showing the structure of a laminated core according to Embodiment 1 of the present invention, FIG. 1B is an enlarged view of portion A shown in FIG. 1A, and FIG. 1C is FIG. It is a top view of (a) and (b).
As shown in the figure, the laminated core 1 is constituted by laminating a plurality of core members 2 which are magnetic plates such as iron plates and electromagnetic steel plates having a thickness of about 1 mm or less. The core member 2 is provided with one circular hole 3 in the center, and four holes 4 for accommodating magnets, which will be described later, are formed on the outer peripheral side of the core member 2 at equal intervals in the circumferential direction. The surface forming the contour of the core member 2 includes an etching processed surface 5 formed by an etching process to be described later, and shear cut surfaces 6 scattered at a plurality of locations on the surface forming the contour. The etched surface 5 occupies most of the surface that forms the contour of the core member 2, and the portion other than the shear cut surface 6 is the etched surface 5. The shear cut surface 6 is disposed on the outermost peripheral surface on the center line between the adjacent holes 4, and is provided at a total of four locations in the first embodiment. And the notch 60 is formed in the both sides of the outline direction (circumferential direction) of the shear cut end face 6. Further, the thickness in the thickness direction of the shear cut surface 6 is smaller than the thickness of the magnetic plate, and in this embodiment, the thickness is set to 80% or less of the magnetic plate. Further, as shown in FIG. 1 (c), the shear cut surface 6 is formed on the inner side of the adjacent etching processed surfaces 5 adjacent to each other in the contour direction (see FIG. 1 (c) an enlarged view below the paper surface).
In the first embodiment, the position of the shear cut surface 6 is evenly arranged on the outermost peripheral surface on the center line between the adjacent holes 4 so as to have a design that does not affect the magnetic characteristics or the like. The position and location of the shear cut surface 6 are not necessarily limited to this, and may be changed as appropriate.

  Next, an example of a method for manufacturing the laminated core 1 will be described. First, the etching process until the contour of the core member 2 is formed will be described. 2 is a process diagram simply showing the etching process, FIG. 3 is a plan view of the core member sheet 7 obtained by the etching process, and FIG. 4 is a concept showing how the core member 2 is cut from the core member sheet 7. FIG.

  As shown in FIG. 2, the plate material roll 100 is obtained by winding a belt-like magnetic plate material 101 made of an iron plate, an electromagnetic steel plate or the like having a thickness of 1 mm or less into a roll shape, and is obtained from a material manufacturer without being insulatively coated. It is. The magnetic plate 101 delivered from the plate roll 100 is first cleaned in the cleaning step 102. The washed magnetic plate material 101 is sent to a resist photosensitive film coating step 103, and a resist photosensitive film is applied to both surfaces of the metal surface of the magnetic plate material 101. Thereafter, the magnetic plate 101 is sent to an exposure step 104 where it is exposed using an etching drawing pattern mask prepared in advance, and the pattern is transferred onto the photosensitive film of the magnetic plate 101. Next, when the magnetic plate 101 is sent to the development step 105, the unexposed unnecessary portions of the photosensitive film of the magnetic plate 101 to which the pattern has been transferred are removed by the development process. When this magnetic plate material 101 is sent to the etching process step 106 and an etching solution is applied, the exposed portion of the metal without the photosensitive film is dissolved and removed, and a necessary portion including the core member 2 is formed on the magnetic plate material 101. Remain. Next, the magnetic plate material 101 is sent to the peeling step 107, and the resist photosensitive film remaining on the necessary portion on the magnetic plate material 101 is removed. Thereafter, the magnetic plate material 101 is sent to an insulation treatment step 108 where it is coated with an insulation film. Finally, the belt-like magnetic plate material 101 is fed by the feed mechanism 109 and cut at a predetermined position by the cutting machine 110 to form the core member sheet 7. A plurality of core member sheets 7 are accumulated in such a process.

As shown in FIG. 3, a plurality of core members 2 are formed on the core member sheet 7 obtained in the etching process. The core member 2 is connected to the frame member 9 or the adjacent core member 2 through a thin support member 8 that supports the core member 2 in a plurality of rows in a matrix. Each core member 2 on the core member sheet 7 is cut in a shearing process described later, as shown in the conceptual diagram of FIG.
Here, the etching drawing pattern mask used in the etching process is a pattern mask for forming the core member sheet 7 shown in FIG. Therefore, the necessary portions remaining on the magnetic plate material 101 described above are the core member 2, the support member 8, and the frame member 9 of the core member sheet 7.
In the etching process, it is possible to punch a gap that is less than the plate thickness or to punch so as to leave a width that is less than the plate thickness. Therefore, in the first embodiment, the length of the support member 8 is set to be equal to or less than the plate thickness. ing. Thereby, the material yield rate of the magnetic plate 101 can be improved. Further, as will be described later, the support member 8 is subjected to stepped etching (half-etching) so that the plate thickness is thinner than the plate thickness of the magnetic plate 101 (see FIG. 6).
In addition, arrangement | positioning of the core member 2 and the supporting member 8 on the core member sheet | seat 7 is not restricted to arrangement | positioning of this Embodiment 1, The structure which connects the several core member 2 with the supporting member 8 efficiently. If so, the arrangement location and number may be changed.

  Next, a shearing process for cutting the core member 2 from the core member sheet 7 and a lamination fixing process for laminating the cut core member 2 to form the laminated core 1 will be described. FIG. 5 is a view showing an apparatus for cutting and laminating the core member 2 from the core member sheet 7. FIG. 6 is an explanatory diagram for explaining the state of the non-processed material 10 after processing in a general shearing process, for comparison with the shearing process of the first embodiment. FIG. 7 is a perspective view for explaining the shearing process in the first embodiment and a cross-sectional view thereof.

  As shown in FIG. 5, the orthogonal robot 201 of the apparatus 200 takes out and holds one core member sheet 7 accumulated in the etching process, and holds the held core member sheet 7 to a predetermined position freely in the XY2 axial directions. Move. When the position of the core member sheet 7 is determined, the adhesive is applied to the lower surface of the predetermined core member 2 by the adhesive application dispenser 202. Subsequently, the core member sheet 7 is positioned by the orthogonal robot 201 so that the core member 2 to which the adhesive is applied is directly below the punch 203. Then, the punch 203 is lowered to cut the core member 2 from the core member sheet 7. The core member 2 cut off from the core member sheet 7 is bonded and fixed while being laminated in the laminated unit 204 including the die, so that the laminated core 1 is formed. In addition, the arrow in the figure indicates the moving direction of each part such as an orthogonal robot.

  The punch 203 is configured by a small simple press or the like, and shearing is performed when the core member 2 is cut from the core member sheet 7. Hereinafter, an example of the shearing process will be described in detail.

  First, for comparison with the first embodiment, the state of the non-processed material 10 after processing by general shearing will be described with reference to FIG. 6A is a cross-sectional view of the shear cut surface 11 of the non-processed material 10, and FIG. 6B is a front view of the shear cut surface 11 corresponding to FIG. 6A. The direction of the arrow in the figure is the traveling direction of a punch or the like (not shown) that cuts the non-processed material 10. As shown in FIG. 6, the general shear cut surface 11 mainly comprises a shear surface 11A and a fracture surface 11B. Then, a sag 11C is generated on the punch entry side (upper side in the drawing), and a burley 11D is formed on the escape side (lower side in the drawing) of the non-work material 10 so as to protrude from the plate thickness.

  Next, the shearing process in the first embodiment will be described in detail with reference to FIG. 7A shows a state in which the two core members 2A and 2B are connected by the thin support member 8, FIG. 7B shows a state in which one core member 2A is cut by the lowering of the punch 203, and FIG. c) shows a state in which the thin support member 8 remaining on the other core member 2B is cut as the lowered punch 203 rises, and the direction of the arrow in the figure is the direction in which the punch 203 advances.

As shown in FIG. 7 (a), the support member 8 is a thin-walled support that has been subjected to stepped etching so that the plate thickness thereof becomes thinner than the plate thickness of the core member 2 (the plate thickness of the magnetic plate 101) in advance. This is the member 8. The half etching process, which is a stepped etching process, is performed by etching only one side of the thin support member 8 in the etching process from both sides, or the etching amount is controlled by changing the etching process conditions. Etc. Further, notches 60 (see FIG. 1B) are also formed by etching on both sides of the support member 8 in the contour direction (circumferential direction).
As shown in FIG. 7B, the punch 203 is lowered, and one core member 2A is cut from the core member 2B. At this time, the burrs 8 </ b> A are generated on the escape side of the punch 203 of the thin support member 8. However, on the core member 2A side, since the plate thickness of the support member 8 is thinner than the plate thickness of the core member 2A, burrs are absorbed at the central portion of the plate thickness of the core member 2A, and no burrs that protrude beyond the plate thickness occur. .
Note that the cutting of the support member 8 at the time of cutting is performed on the inner side of the etching processing surface 5 adjacent in the contour direction, thereby forming the shear cut surface 6 on the inner side of the etching processing surface 5 adjacent in the contour direction (FIG. 1). (See (c)). At this time, the etching processing surface 5A formed on the side of the shear cut surface 6 in the stacking direction (see FIG. 1B) is etched so as to be inside the etching processing surface 5 adjacent to the contour direction of the support member 8. Has been.
Next, as shown in FIG. 7C, the punch 203 is raised, and the thin support member 8 remaining on the other core member 2B is cut. At that time, the burrs 8B are generated on the approach side of the punch of the thin support member 8. However, on the core member 2B side, since the plate thickness of the support member 8 is thinner than the plate thickness of the core member 2B, burrs are absorbed at the center of the plate thickness of the core member 2B, and burrs that protrude beyond the plate thickness do not occur. .
As a result, most of the surface forming the contour of the cut core member 2 is occupied by the etched surface 5, and only a small portion connected to the thin support member 8 has the shear cut surface 6 without burrs. Exist.

  In the first embodiment, the thickness of the support member 8 in the thickness direction is etched to about 80% or less of the thickness of the magnetic plate 101. Generally, the clearance (gap) between the punch and die of a simple press is several percent of the plate thickness of the workpiece, and the amount of burrs is considered to be about the same as this ratio or slightly higher than this ratio. ing. Therefore, by setting the thickness of the support member 8 in the plate thickness direction to 80% or less of the plate thickness of the magnetic plate 101, the occurrence of burrs outside the plate thickness of the core member 2 can be more reliably prevented.

An example of use of the laminated core 1 manufactured as described above is shown in FIG. FIG. 8 is a perspective view showing a rotor using the laminated core 1.
As shown in the drawing, a magnet 12 is inserted into each hole 4 of the laminated core 1, and a magnet built-in type rotor 13 is formed.

  As described above, in the first embodiment, the thickness in the plate thickness direction of the shear cut surface existing in a small part connected to the thin support member in the surface forming the contour of the core member is the magnetic plate material. Since the thickness is less than the thickness of the plate, no burrs that protrude beyond the thickness of the shear cut surface are generated. Thereby, while preventing the short circuit between the lamination | stacking by burrs, a lamination | stacking clearance gap is reduced and the lamination | stacking core and rotor with a high assembly precision can be obtained. As a result, a motor with less noise and vibration can be realized, and the energy consumption of the motor can be reduced. Further, since the thickness of the shear cut surface is thin, it is possible to prevent magnetic deterioration of the magnetic plate material due to shear. Furthermore, by reducing the thickness of the shear cut surface, the ratio of the etched surface can be further increased, and a laminated core and rotor with less processing strain when forming the core member can be obtained.

  Further, by using a core member sheet formed by etching so that a plurality of core members are connected in a matrix in a matrix by a support member, the core member sheet is used until just before each core member is cut and laminated. Since each core member is easily laminated by being sheared by a simple press or the like, the laminated core and the rotor can be manufactured with high productivity.

  Further, since the support member has a thin plate thickness and is provided with notches on both sides in the contour direction, stress is concentrated on the notched portion during shearing with a punch or the like, so that the cutting can be easily performed. Furthermore, since the shear cut surface is cut so as to be on the inner side of the etching processing surface adjacent in the contour direction, it is possible to reliably prevent burrs from jumping into the air gap between the rotor and the stator. Therefore, the contact between the rotor and the stator can be prevented, and the air gap is not partially reduced, so that it is possible to suppress the rotational vibration caused by the magnetic non-uniformity.

  In addition, since it is possible to perform fine processing such as punching to leave a member with a width equal to or less than the plate thickness in the etching processing, the length of the support member is shortened, and the gap between the core members is reduced, thereby reducing waste during manufacturing. The material yield rate is improved because there is no waste material. In addition, a thin portion having a narrow width can be formed without processing distortion by etching, so that a laminated core and rotor having high strength can be manufactured.

Embodiment 2. FIG.
In the first embodiment, the case where the core member is substantially circular has been described. However, the present invention can also be applied to, for example, a substantially T-shaped core member.

FIG. 9 is a perspective view showing the structure of the laminated core 20 according to the second embodiment of the present invention. In the figure, the laminated core 20 is formed by laminating a plurality of core members 21, which are magnetic plates, and the core member 21 includes a yoke portion 22, a tooth portion 23 protruding from the yoke portion 22 in a substantially orthogonal direction, and a teeth portion 23. It has a substantially T-shape having a tooth tip portion 23A located at the tip. The surface that forms the outline of the core member 21 includes an etching processed surface 24 that occupies most of the surface and shear cut surface 25 that is scattered at a plurality of locations. In the second embodiment, a shear cut surface 25A is formed on the surface of the yoke portion 22 opposite to the tooth portion 23, and a shear cut surface 25B is formed on the side surface of the tooth portion 23.
Since the shape of the shear cut surfaces 25A and 25B is the same as that of the first embodiment, a description thereof is omitted (see FIGS. 1B and 1C).

The manufacturing method of the laminated core 20 is the same as that in the first embodiment, but in the second embodiment, an etching drawing pattern mask that forms a core member sheet including a substantially T-shaped core member is used. FIG. 10 is a plan view of the core member sheet 26 obtained in the etching process in the second embodiment.
As shown in the drawing, a plurality of substantially T-shaped core members 21 are formed in the core member sheet 26. The core member 21 is connected in a matrix manner to the frame member 28 and the adjacent core member 21 through a thin support member 27. In the second embodiment, the core members 21 are arranged in a plurality of rows in a substantially straight comb shape, and are alternately arranged so that the comb teeth in each row mesh. The thin support member 27 </ b> A is formed on the side surface of the tooth portion 23 of each core member 21, and connects the tooth portions 23 of the adjacent core members 21. The thin support member 27B is formed on the surface of the yoke portion 22 of each core member 21 opposite to the tooth portion 23, and connects the yoke portions of the adjacent core members 21, and the frame member 28 and the core member 21. Yes. The thin support member 27 </ b> C is formed on the end surface of the yoke portion 22 of the core member 21 disposed at the end of each row, and connects the frame member 28 and the core member 21.
In the second embodiment, as in the first embodiment, the length of the support member 27 (27A to 27C) is set as short as possible in order to increase the material yield of the magnetic plate material. The length of the support member 27 can be set to be equal to or less than the plate thickness by the arrangement of the core member 21, and the arrangement of the core member 21 and the support member 27 on the core member sheet 26 is limited to the arrangement of the second embodiment. It is not a thing.

The core member 21 formed by being connected to the core member sheet 26 with thin support members 27A to 27C is coated with an adhesive on the back surface while the thin support members 27A to 27C are used with a small simple press or the like. The laminated core 20 is obtained by being cut and further laminated and fixed.
Next, the usage example of this laminated core 20 is shown in FIG. FIG. 11 is a plan view showing a stator 29 using the laminated core 20. As shown in the figure, the stator 29 is arranged in an annular shape by aligning both end portions of the yoke portions 22 of the plurality of laminated cores 20, and each laminated core is fixed by welding, bonding, shrink fitting on a metal frame, or the like. It is formed by. An insulator 30 is mounted on the tooth portion 23 of each laminated core 20, and a coil 31 (not shown) is wound around the tooth portion 23 via the insulator 30. In the second embodiment, the stator 29 is formed by using nine substantially T-shaped core members 21. However, the present invention is not limited to this.

  As described above, in the second embodiment, the thickness in the plate thickness direction of the shear cut surface existing in a small part connected to the thin support member in the surface forming the contour of the core member is the magnetic plate material. Since the thickness is less than the thickness of the plate, no burrs that protrude beyond the thickness of the shear cut surface are generated. Thereby, while preventing the short circuit between lamination | stacking by burrs, a lamination | stacking clearance gap is reduced and the lamination | stacking core and stator with high assembly precision can be obtained. As a result, a motor with less noise and vibration can be realized, and the energy consumption of the motor can be reduced. Further, since the thickness of the shear cut surface is thin, it is possible to prevent magnetic deterioration of the magnetic plate material due to shear. Furthermore, by reducing the thickness of the shear cut surface, the ratio of the etched surface can be further increased, and a laminated core and stator with less processing strain when forming the core member can be obtained.

  Further, by using a core member sheet formed by etching so that a plurality of core members are connected in a matrix in a matrix by a support member, the core member sheet is used until just before each core member is cut and laminated. Since each core member is easily laminated by shearing with a simple press or the like, the laminated core and the stator can be manufactured with high productivity.

  Further, since the support member has a thin plate thickness and is provided with notches on both sides in the contour direction, stress is concentrated on the notched portion during shearing with a punch or the like, so that the cutting can be easily performed. Furthermore, since the shear cut surface is cut so as to be inside the etching processing surface adjacent in the contour direction, the annular laminated core is fixed by, for example, shrink fitting to a metal frame, When installing the insulator, it can be assembled accurately.

  In addition, since it is possible to perform fine processing such as punching to leave a member with a width equal to or less than the plate thickness in the etching processing, the length of the support member is shortened, and the gap between the core members is reduced, thereby reducing waste during manufacturing. The material yield rate is improved because there is no waste material. In addition, a thin portion having a narrow width can be formed without processing distortion by etching, so that a laminated core and a stator having high strength can be manufactured.

Embodiment 3 FIG.
In the second embodiment, the case where the core member is a substantially T-shaped core member has been described. For example, the present invention is also applied to a comb-shaped core member in which a plurality of substantially T-shaped cores are connected in a substantially straight line. can do.

FIG. 12 is a perspective view showing the structure of the laminated core 40 according to Embodiment 3 of the present invention. In the figure, the laminated core 40 is formed by laminating a plurality of core members 41 that are magnetic plates, and the core member 41 includes a yoke portion 42, a tooth portion 43 that protrudes from the yoke portion 42 in a substantially orthogonal direction, and a teeth portion 43. A comb tooth shape is formed by connecting a plurality of substantially T-shapes having teeth tip portions 43 </ b> A located at the tips of the teeth substantially in a straight line. The surface that forms the outline of the core member 41 includes an etching processed surface 44 that occupies most of the surface, and shear cut surfaces 45 that are scattered at a plurality of locations. In the third embodiment, a shear cut surface 45A is formed on the surface of the yoke portion 42 opposite to the tooth portion 43, and a shear cut surface 45B is formed on the side surface of the tooth portion 43. The surface that forms the contour other than the shear cut surfaces 45A and 45B is an etching processed surface 44.
Since the shape of the shear cut surfaces 45A and 45B is the same as that of the first embodiment, a description thereof will be omitted (see FIGS. 1B and 1C).

The manufacturing method of the laminated core 40 is the same as that of the first embodiment. However, in the third embodiment, a core member sheet including a comb-shaped core member in which a plurality of substantially T-shapes are connected in a substantially straight line is formed. Such an etching drawing pattern mask is used. FIG. 13 is a plan view of the core member sheet 46 obtained in the etching process in the third embodiment.
As shown in the drawing, the core member sheet 46 is formed with a plurality of rows of comb-shaped core members 41 in which a plurality of substantially T-shapes are connected in a substantially straight line. Each core member 41 is connected to the frame member 48 and the adjacent core member 41 via a thin support member 47. In the third embodiment, the core members 41 are arranged in alternating directions so that the comb teeth of the core members 41 are engaged with each other. The thin support member 47 </ b> A is formed on the side surface of the predetermined tooth portion 43 of the core member 41, and connects the tooth portions 43 of the adjacent core members 41. The thin support member 47B is formed on the surface of the predetermined yoke portion 42 opposite to the teeth portion 43, and connects the yoke portions of the adjacent core members 41, and the frame member 48 and the core member 41. The thin support member 47 </ b> C is formed on the end face of the yoke portion 42 located at the end of the core member 41, and connects the frame member 48 and the core member 41.
In the third embodiment, as in the first and second embodiments, the length of the support member 47 (47A to 47C) is set as short as possible in order to increase the material yield of the magnetic plate material. The length of the support member 47 can be set to be equal to or less than the plate thickness by the arrangement of the core member 41. The arrangement of the core member 41 and the support member 47 on the core member sheet 46 is limited to the arrangement of the third embodiment. The arrangement location and the number may be changed.

The core member 41 formed by being connected to the core member sheet 46 with thin support members 47A to 47C is applied with a thin simple support press with the thin support members 47A to 47C while an adhesive is applied to the back surface. The laminated core 40 is obtained by being cut and further laminated and fixed.
Next, a usage example of the laminated core 40 is shown in FIG. FIG. 14 is a plan view showing a stator 49 using the laminated core 40. As shown in the figure, the stator 49 is formed by bending a plurality of substantially T-shapes of the laminated core 40 into an annular shape, and matching the end faces of the yoke portions 42 arranged at both ends, and welding, bonding, or shrink fitting to a metal frame. It is formed by fixing each laminated core by, for example. Although not shown in FIG. 14, as in the second embodiment, each of the teeth portions 43 of the laminated core 40 is provided with an insulator 50, and the coils 51 are attached to the teeth portions 43 via the insulator 50. It is wound. In the third embodiment, the stator is formed by using the comb-shaped core member 41 in which nine substantially T-shapes are connected, but the number of T-shapes to be connected is not limited to this.

  As described above, in the third embodiment, the thickness in the thickness direction of the shear cut surface existing in a small part connected to the thin support member in the surface forming the contour of the core member is the magnetic plate material. Since the thickness is less than the thickness of the plate, no burrs that protrude beyond the thickness of the shear cut surface are generated. Thereby, while preventing the short circuit between lamination | stacking by burrs, a lamination | stacking clearance gap is reduced and the lamination | stacking core and stator with high assembly precision can be obtained. As a result, a motor with less noise and vibration can be realized, and the energy consumption of the motor can be reduced. Further, since the thickness of the shear cut surface is thin, it is possible to prevent magnetic deterioration of the magnetic plate material due to shear. Furthermore, by reducing the thickness of the shear cut surface, the ratio of the etched surface can be further increased, and a laminated core and stator with less processing strain when forming the core member can be obtained.

  In addition, by using a core member sheet formed by etching so that a plurality of core members are connected to each other by a support member, the core members are connected to the core member sheet until immediately before being cut and laminated. Since each core member is easily laminated by being sheared by a simple press or the like, the laminated core and the stator can be manufactured with high productivity.

  Further, since the support member has a thin plate thickness and is provided with notches on both sides in the contour direction, stress is concentrated on the notched portion during shearing with a punch or the like, so that the cutting can be easily performed. Furthermore, since the shear cut surface is cut so as to be inside the etching processing surface adjacent in the contour direction, when the laminated core bent in an annular shape is fixed to the metal frame by shrink fitting, etc. When the insulator is mounted on, it can be assembled with high accuracy.

  In addition, since it is possible to perform fine processing such as punching to leave a member with a width equal to or less than the plate thickness in the etching processing, the length of the support member is shortened, and the gap between the core members is reduced, thereby reducing waste during manufacturing. The material yield rate is improved because there is no waste material. In addition, a thin portion having a narrow width can be formed without processing distortion by etching, so that a laminated core and a stator having high strength can be manufactured.

In the first to third embodiments, the laminated core is bonded and fixed immediately before the core member is cut, but the method for fixing the laminated core is not limited to this, for example, resin It may be used for an adhesive function with the adhesive interposed between them, or may be coated with an adhesive in the insulating process.
Moreover, in the said Embodiment 1-3, although the strip | belt-shaped magnetic board | plate material is cut | disconnected for every core member sheet | seat at the etching process, it is a shearing process and a lamination | stacking fixing process in the state wound up in roll shape without cut | disconnecting. May be supplied.

FIG. 1 is a structural diagram of a laminated core according to Embodiment 1 of the present invention. It is process drawing which shows simply the etching process process by Embodiment 1 of this invention. It is a top view of the core member sheet | seat obtained at the etching process process by Embodiment 1 of this invention. It is a conceptual diagram which shows a mode that a core member is cut | disconnected from the core member sheet | seat by Embodiment 1 of this invention. It is a figure which shows the apparatus which cut | disconnects and laminates | stacks a core member from the core member sheet | seat by Embodiment 1 of this invention. It is explanatory drawing explaining the state of the non-processed material after the process in the general shearing process by the comparative example of Embodiment 1 of this invention. It is the perspective view explaining the shearing process by Embodiment 1 of this invention, and its principal part sectional drawing. It is a perspective view which shows the rotor using the laminated core by Embodiment 1 of this invention. It is a perspective view which shows the structure of the laminated core by Embodiment 2 of this invention. It is a top view of the core member sheet | seat obtained at the etching process process by Embodiment 2 of this invention. It is a top view which shows the stator using the laminated core by Embodiment 2 of this invention. It is a perspective view which shows the structure of the laminated core by Embodiment 3 of this invention. It is a top view of the core member sheet | seat obtained at the etching process process by Embodiment 3 of this invention. It is a top view which shows the stator using the laminated core by Embodiment 3 of this invention.

1 laminated core, 2, 2A, 2B core member, 3 circular hole, 4 hole,
5 etched surface, 6 shear cut surface, 60 notch, 7 core member sheet,
8 support members, 12 magnets, 13 rotors, 20 laminated cores, 21 core members,
22 yoke, 23 teeth, 24 etched surface,
25, 25A, 25B shear cut surface, 26 core member sheet,
27, 27A, 27B, 27C support member, 29 stator, 30 insulator,
31 coils, 40 laminated cores, 41 core members, 42 yoke parts, 43 teeth parts,
44 etched surface, 45, 45A, 45B shear cut surface,
46 Core member sheet, 47, 47A, 47B, 47C Support member, 49 Stator,
50 insulator, 51 coil, 101 magnetic plate material.

Claims (13)

A laminated core that is formed by stacking a plurality of core members that are magnetic plates, and a surface that forms an outline of the core member includes an etched surface formed by an etching process and a plurality of surfaces that form the outline consists of a shear cut surface in a scattered locations, the thickness direction of the thickness of the shear cut surface is rather thin than the thickness of the magnetic sheet,
A laminated core comprising notches on both sides in the contour direction of the shear cut surface . The laminated core according to claim 1 , wherein a shear cut surface of the core member is formed on an inner side than the etching processed surface adjacent in a contour direction. A laminated core that is formed by stacking a plurality of core members that are magnetic plates, and a surface that forms an outline of the core member includes an etched surface formed by an etching process and a plurality of surfaces that form the outline consists of a shear cut surface in a scattered locations, the thickness direction of the thickness of the shear cut surface is rather thin than the thickness of the magnetic sheet,
The core member has a circular shape having a substantially circular hole arranged at the center and a plurality of holes arranged at equal intervals in the circumferential direction on the outer peripheral side, and the shear cut surface is a center between adjacent holes. A laminated core characterized by being arranged on the outermost peripheral surface on a line . 4. The laminated core according to claim 3 , wherein a thickness of the shear cut surface in a thickness direction is 80% or less of a thickness of the magnetic plate material. The core member has a circular shape having a substantially circular hole arranged at the center and a plurality of holes arranged at equal intervals in the circumferential direction on the outer peripheral side, and the shear cut surface is a center between adjacent holes. The laminated core according to claim 1 , wherein the laminated core is disposed on an outermost peripheral surface on a line. The core member has a substantially T shape having a yoke portion and a teeth portion protruding from the yoke portion, and the shear cut end surface is disposed on a surface opposite to the teeth portion in the yoke portion. The laminated core according to claim 1 , wherein the laminated core is provided. The core member has a substantially T shape having a yoke part and a tooth part protruding from the yoke part, and the shear cut surface is disposed on a side surface of the tooth part. The laminated core according to claim 1 or claim 2 . The core member has a comb-like shape in which a plurality of substantially T-shapes having a yoke part and a teeth part protruding from the yoke part are connected in a substantially straight line, and the shear cut surface is formed in the yoke part. The laminated core according to claim 1 , wherein the laminated core is disposed on a surface opposite to the tooth portion. The core member has a comb-like shape in which a plurality of substantially T-shapes each having a yoke portion and a teeth portion protruding from the yoke portion are connected in a substantially straight line, and the shear cut end surface is a side surface of the teeth portion. The laminated core according to claim 1 , wherein the laminated core is disposed in a stacked structure. The rotor formed of the laminated core according to claim 5, further comprising a magnet inserted and disposed in the plurality of holes. A stator comprising: a coil attached to a tooth portion of the laminated core according to claim 6 or 7 via an insulator, and the laminated core being arranged in an annular shape. A coil attached to each tooth portion of the laminated core according to claim 8 or 9 via an insulator, and a substantially T-shaped portion connected in a comb-tooth shape of the laminated core is bent and arranged in an annular shape. A stator characterized by being formed. The rotor formed of the laminated core according to claim 3, further comprising a magnet inserted and disposed in the plurality of holes.

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