WO2019049486A1 - Stator core manufacturing method, motor provided with stator core manufactured by stator core manufacturing method, stator core manufacturing device, and method for manufacturing stacked member - Google Patents

Stator core manufacturing method, motor provided with stator core manufactured by stator core manufacturing method, stator core manufacturing device, and method for manufacturing stacked member Download PDF

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Publication number
WO2019049486A1
WO2019049486A1 PCT/JP2018/025009 JP2018025009W WO2019049486A1 WO 2019049486 A1 WO2019049486 A1 WO 2019049486A1 JP 2018025009 W JP2018025009 W JP 2018025009W WO 2019049486 A1 WO2019049486 A1 WO 2019049486A1
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WO
WIPO (PCT)
Prior art keywords
stator core
divided
laminate
manufacturing
steel plate
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PCT/JP2018/025009
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French (fr)
Japanese (ja)
Inventor
武 本田
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日本電産株式会社
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Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201880050800.0A priority Critical patent/CN111033979B/en
Priority to JP2019540787A priority patent/JP7047847B2/en
Publication of WO2019049486A1 publication Critical patent/WO2019049486A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

Definitions

  • the present invention relates to a stator core manufacturing method, a motor including a stator core manufactured by the stator core manufacturing method, a stator core manufacturing apparatus, and a method of manufacturing a laminated member.
  • a method of manufacturing a stator core of a motor there is known a method of punching a steel plate into a shape of a stator core by a pressing device or the like and laminating a plurality of punched formed steel plates in a thickness direction.
  • the stator core is divided into a plurality of pieces in the circumferential direction, thereby increasing the number of turns of the stator coil with respect to the teeth while increasing work efficiency. Ways to improve are also known.
  • Patent Document 1 As a method of manufacturing a stator core as described above, a stator core formed by laminating a plurality of annular plate members is divided along the circumferential direction to be divided cores A method of manufacturing a brushless motor for an electric power steering device, which forms a unit, is known. In this manufacturing method, after winding the winding individually on the divided core units, the divided core units are rejoined in the same combination as at the time of division to obtain a stator.
  • An object of the present invention is to manufacture a stator core capable of easily and easily dividing a laminate obtained by laminating a plurality of formed steel plates in the thickness direction without peeling of steel plates constituting the laminate. To provide a way.
  • a method of manufacturing a stator core according to an embodiment of the present invention is a method of manufacturing a stator core in which a plurality of divided cores in which a plurality of plate-shaped divided core pieces are stacked are annularly arranged around a central axis.
  • this stator core manufacturing method after a part of the steel plate is punched in the shape of the divided core piece in the axial direction of the central axis, pushback processing is performed to return the punched divided core piece to the original position of the steel plate.
  • the laminated body obtained by laminating a plurality of formed steel sheets in the thickness direction is simple without the steel plates constituting the laminated body being peeled off. And it can be divided easily.
  • FIG. 1 is a view schematically showing a schematic configuration of a motor according to the embodiment in a cross section including a central axis.
  • FIG. 2 is a perspective view showing a schematic configuration of a stator core.
  • FIG. 3 is a flowchart showing a method of manufacturing a stator core.
  • FIG. 4 is a plan view of the electromagnetic steel sheet before forming the split core piece forming portion.
  • FIG. 5 is a plan view showing a schematic configuration of a formed steel plate.
  • FIG. 6 is a view schematically showing (a) a state in which the first tool is moved with respect to the second tool, and (b) a state in which the first tool is returned to the original position in pushback processing. is there.
  • FIG. 6 is a view schematically showing (a) a state in which the first tool is moved with respect to the second tool, and (b) a state in which the first tool is returned to the original position in pushback processing. is there.
  • FIG. 7 is a perspective view showing a schematic configuration of a formed steel plate laminate in which a plurality of formed steel plates are stacked in the thickness direction.
  • FIG. 8 is a top view showing a schematic configuration of a stator core laminate after cutting processing.
  • FIG. 9 is a top view showing a schematic configuration of the stator core division device.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.
  • FIG. 12 is a perspective view showing a stator core laminate divided into a plurality of divided cores.
  • a direction parallel to the central axis of the rotor is "axial direction”
  • a direction perpendicular to the central axis is “radial direction”
  • a direction along an arc centered on the central axis is “circumferential direction” It is called respectively.
  • this direction is not intended to limit the use direction of the motor according to the present invention.
  • FIG. 1 shows a schematic configuration of a motor 1 according to an embodiment of the present invention.
  • the motor 1 includes a rotor 2, a stator 3, a housing 4, and a cover plate 5.
  • the rotor 2 rotates around the central axis P with respect to the stator 3.
  • the motor 1 is a so-called inner rotor type motor in which the rotor 2 is disposed rotatably around the central axis P in the cylindrical stator 3.
  • the rotor 2 includes a shaft 20, a rotor core 21, and a magnet 22.
  • the rotor 2 is disposed radially inward of the stator 3 and is rotatable relative to the stator 3.
  • the rotor core 21 has a cylindrical shape extending along the central axis P.
  • the rotor core 21 is configured by laminating a plurality of electromagnetic steel plates formed in a predetermined shape in the thickness direction.
  • a shaft 20 extending along the central axis P is fixed to the rotor core 21 in an axially penetrating state. Thereby, the rotor core 21 rotates with the shaft 20. Further, in the present embodiment, on the outer peripheral surface of the rotor core 21, the plurality of magnets 22 are disposed at predetermined intervals in the circumferential direction.
  • the magnet 22 may be a ring magnet connected in the circumferential direction.
  • the stator 3 is housed in the housing 4.
  • the stator 3 is cylindrical, and the rotor 2 is disposed radially inward. That is, the stator 3 is disposed to face the rotor 2 in the radial direction.
  • the rotor 2 is disposed radially inward of the stator 3 so as to be rotatable about a central axis P.
  • the stator 3 includes a stator core 31, a stator coil 36, and a bracket 37.
  • the stator core 31 has a cylindrical shape extending in the axial direction.
  • the stator core 31 has a plurality of electromagnetic steel plates formed in a predetermined shape and stacked in the thickness direction.
  • the stator core 31 has a plurality of divided cores 32 as described later.
  • the stator core 31 has a plurality of teeth 31 b extending radially inward from a cylindrical yoke 31 a.
  • the stator coil 36 is wound on a bracket 37 made of an insulating material (for example, an insulating resin material) mounted on the teeth 31 b of the stator core 31.
  • the brackets 37 are disposed on both axial end faces of the stator core 31.
  • the stator core 31 has a plurality of divided cores 32 disposed annularly around the central axis P. In the example shown in FIG. 2, the stator core 31 has twelve divided cores 32. Each split core 32 has a split yoke portion 32a that constitutes a part of a cylindrical yoke 31a, and one tooth 31b.
  • the number of divided cores 32 constituting the stator core 31 is appropriately determined according to the number of teeth 31 b. That is, if the number of teeth of the stator core is more than 12, the number of divided cores is more than 12. On the other hand, if the number of teeth in the stator core is less than 12, the number of split cores is less than 12.
  • the split core 32 has a plurality of plate-like split core pieces 33 stacked.
  • the plurality of split core pieces 33 that constitute the split core 32 have the same shape.
  • the split core piece 33 has a split yoke piece 33a that constitutes a part of the split yoke portion 32a and a tooth piece 33b that constitutes a part of the teeth 31b.
  • the plurality of split core pieces 33 are connected to each other by caulking portions 33 c provided on the split yoke pieces 33 a and the teeth pieces 33 b in a state of being stacked in the thickness direction.
  • the circumferential end of the divided yoke portion 32a is in contact with the circumferential end of the divided yoke portion 32a adjacent to the divided yoke portion 32a in the circumferential direction.
  • the annular yoke 31 a of the stator core 31 is configured by the divided yoke portions 32 a of the plurality of divided cores 32.
  • the housing 4 is cylindrical and extends along the central axis P.
  • the housing 4 has a cylindrical shape having an internal space capable of housing the rotor 2 and the stator 3 therein.
  • the housing 4 has a cylindrical side wall 4a and a bottom 4b covering one axial end of the side wall 4a.
  • the opening on the other side in the axial direction of the housing 4 is covered by a cover plate 5.
  • the housing 4 and the cover plate 5 are made of, for example, a material containing iron.
  • the cover plate 5 may be fixed to the housing 4 by, for example, a bolt or the like, or may be fixed by a method such as press fitting or adhesion.
  • the housing 4 and the cover plate 5 may be comprised not only by the material containing iron but other materials, such as aluminum (aluminium alloy is included).
  • FIG. 3 is a flowchart showing an example of a method of manufacturing the stator core 31.
  • FIG. 4 is a plan view of the electromagnetic steel sheet 40 before the split core piece forming portion 41 is formed.
  • FIG. 5 is a plan view showing a formed steel plate 50 in which a split core piece forming portion 41 to be the split core pieces 33 is formed.
  • FIG. 6 is a diagram schematically showing push back processing.
  • FIG. 7 is a perspective view showing a formed steel plate laminate 60 in which a plurality of formed steel plates 50 are stacked in the thickness direction.
  • FIG. 8 is a plan view showing a stator core laminate 70 obtained by cutting the formed steel plate laminate 60.
  • a circular central hole 40a is punched out of a magnetic steel sheet which is a magnetic material. This process is the central hole punching process shown in FIG. 3 (step S1). The center of the central hole 40 a coincides with the central axis P of the motor 1.
  • step S2 a plurality of slots 40b are punched around the central hole 40a to form a plurality of tooth pieces 33b surrounding the central hole 40a.
  • This process is the slot punching process shown in FIG. 3 (step S2).
  • central hole punching process and slot punching process are performed by press working.
  • the central hole punching process and the slot punching process are the same as those of the conventional stator core manufacturing method, and thus the detailed description is omitted.
  • FIG. 4 shows the electromagnetic steel sheet 40 (hereinafter referred to as a steel sheet) in which the central hole 40a and the slot 40b are formed as described above.
  • the some through-hole 40c is pierced by the outer peripheral side.
  • the punching of the outer shape of the steel plate 40 and the punching of the through holes 40c may be performed simultaneously with the above-mentioned central hole punching step or slot punching step, or before, after, or after the central hole punching step and slot punching step. You may go between
  • the split core piece forming portion 41 to be the split core piece 33 is provided on the outer peripheral side of the central hole 40a.
  • a plurality of rings are molded side by side.
  • the split core piece molding portion 41 has a split yoke piece molding portion 41a to be a split yoke piece 33a and a teeth piece 33b.
  • the split yoke piece molding portion 41a is molded.
  • the steel plate 40 is punched in the thickness direction with the shape of the split yoke piece 33a outside the teeth piece 33b with respect to the center of the central hole 40a.
  • the so-called push back processing is performed to return the punched out part to its original position. This process is the push back process shown in FIG. 3 (step S3).
  • push back processing has a first tool W1 having a pair of upper and lower tools sandwiching a part of a steel plate 40 in the thickness direction, and a pair of upper and lower tools sandwiching a part of the steel plate 40 in the thickness direction It is performed using the second tool W2.
  • the first tool W1 is movable in the thickness direction of the steel plate 40 with respect to the second tool W2.
  • the first tool W1 has the same shape as the divided yoke piece 33a.
  • the moving distance of the first tool W1 with respect to the second tool W2 may be a moving distance for separating the steel plate 40, or may be a moving distance for not separating the steel plate 40.
  • the first tool W1 is returned to the original position by moving the first tool W1 to the other side in the thickness direction of the steel plate 40 with respect to the second tool W2.
  • the part pinched by 1st tool W1 among the steel plates 40 is engage
  • the divided yoke piece molding portion 41a has the extrusion portion 42 in which the above-described pushback processing is performed and the non-extrusion portion 43 which is not extruded. As shown in FIG. 5, the extruded portions 42 and the non-extruded portions 43 are alternately positioned in the circumferential direction.
  • a dividing portion 44 is formed between the pushing portion 42 and a portion which is not pushed out by the push back process. That is, in the boundary between the extruded portion 42 and the non-extruded portion 43 and the boundary between the extruded portion 42 and the outer peripheral side of the steel plate 40, the dividing portion 44 is formed by push back processing. In the dividing portion 44, the pushing portion 42 is held by friction with respect to the other portion.
  • the step of forming the formed steel plate 50 in which a plurality of divided core piece forming portions 41 to be divided core pieces 33 are annularly arranged by push back processing as described above corresponds to the push back step.
  • the divided yoke piece forming portion 41a As described above, by forming the divided yoke piece forming portion 41a by the pushback process, the divided yoke piece forming portion 41a is not bent at the time of processing. Thereby, the generation of residual stress and residual strain due to processing can be suppressed. Therefore, the dimensional accuracy of the split core pieces 33, that is, the stator core 31 can be enhanced. Further, since the disturbance of the flow of the magnetic flux in the split core piece 33 can be suppressed by suppressing the generation of the residual stress and the residual strain as described above, it is possible to suppress the deterioration of the magnetic characteristics of the stator core 31.
  • the crimped portion 33c is formed on the split yoke piece forming portion 41a and the teeth piece 33b.
  • the caulking portion 33c is obtained by forming a convex portion having a recess on the surface on the other side in the thickness direction while protruding in one of the thickness direction on the split yoke piece forming portion 41a and the teeth piece 33b.
  • the step of forming the caulking portion 33c is a caulking portion forming step shown in FIG. 3 (step S4).
  • step S5 This process is the laminating process shown in FIG. 3 (step S5).
  • the formed steel plate laminate 60 is cut at a cutting position X (a position shown by a broken line in FIG. 7) on the outer peripheral side of the divided yoke piece forming portion 41a by electric discharge machining or the like, as shown in top view in FIG.
  • the stator core laminate 70 is obtained.
  • This process is a processing process shown in FIG. 3 (step S6).
  • the cutting position X at the time of cutting the formed steel plate laminate 60 is a position on the inner peripheral side of the outer peripheral end of the divided yoke piece forming portion 41 a.
  • the lamination step of laminating the formed steel plates 50 in the thickness direction to obtain the formed steel plate laminate 60, and the processing step of cutting the formed steel plate laminate 60 to obtain the stator core laminate 70 are the laminate forming steps.
  • stator core laminate 70 can be divided into a plurality of divided cores 32 as described later.
  • FIG. 9 is a top view showing a schematic configuration of a stator core division device 100 (stator core manufacturing device) for dividing the stator core laminate 70 into a plurality of divided cores 32.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.
  • FIG. 12 is a perspective view showing the stator core laminate 70 divided into a plurality of divided cores 32. As shown in FIG.
  • the stator core division device 100 supports the holding portion 101 holding the stator core laminate 70, the external force applying portion 110 applying a force to the side surface of the stator core laminate 70, the holding portion 101 and the external force applying portion 110. And a frame 120.
  • the holding portion 101 has a pair of holding members 102 which sandwich a part of the outer peripheral side of the cylindrical stator core laminate 70 in the radial direction.
  • the pair of holding members 102 can be advanced and retracted with respect to the frame 120 by the screws 103.
  • the pair of holding members 102 have contact surfaces 102 a that are arc-shaped in top view and contact the outer peripheral side of the rotor core laminate 70.
  • the external force application unit 110 has a pin 111 for applying a force of a component in a direction perpendicular to the stacking direction to the stator core laminate 70, and an actuator 112 for advancing and retracting the pin 111. That is, the pin 111 of the external force applying unit 110 applies the force of the component in the vertical direction to the outer peripheral side of the stator core laminate 70 held by the holding unit 101. Thereby, the stator core laminate 70 can be deformed in the radial direction. Therefore, the divided portions 44 located between the divided yoke piece molding portions 41a adjacent to each other in the stator core laminated body 70 are separated, and the stator core laminated body 70 is divided into a plurality of divided cores 32 as shown in FIG. It is divided.
  • Body 70 can be divided into multiple split cores 32.
  • stator core laminate 70 when the stator core laminate 70 is divided into a plurality of divided cores 32, the pins 111 of the external force applying portion 110 sequentially with respect to a plurality of places in the circumferential direction of the stator core laminate 70. Apply the force of the vertical component. Thereby, the stator core laminate 70 can be divided into the plurality of divided cores 32 quickly and easily.
  • stator core laminate 70 When the force of the component in the vertical direction is applied to a plurality of locations in the circumferential direction of the stator core laminate 70, a plurality of split core piece forming portions annularly arranged in the circumferential direction in the stator core laminate 70 It is preferable to apply the force of the component of the said perpendicular direction to the outer peripheral side of the stator core laminated body 70 with respect to the some division
  • the stator core laminate 70 can be efficiently divided into the plurality of divided cores 32.
  • the split core piece molding portions 41 separated from each other mean the split core piece molding portions 41 which are not adjacent to each other in the circumferential direction.
  • the pin 111 of the external force applying portion 110 is positioned to face the central portion of the stator core laminate 70 in the stacking direction.
  • the force of the component in the vertical direction can be applied to the central portion of the stator core laminate 70 in the stacking direction by the pins 111.
  • the stator core laminate 70 can be efficiently divided into the plurality of divided cores 32.
  • stator core laminate 70 can be efficiently divided into the plurality of divided cores 32.
  • the pin 111 of the external force applying portion 110 is stacked on the stator core with respect to the boundary portion (the dividing portion 44) of the plurality of split core piece forming portions 41 arranged annularly in the circumferential direction in the stator core laminate 70.
  • the force of the vertical component is applied to the outer peripheral side of the body 70.
  • the force of the component in the direction perpendicular to the lamination direction of the formed steel plate 50 is applied to the outer peripheral side of the stator core laminate 70 to divide the stator core laminate 70 into a plurality of divided cores 32
  • the corresponding step corresponds to the dividing step (step S7 in FIG. 3).
  • a plurality of stator core laminates 70 obtained by laminating formed steel plates 50 press-formed into the shape of divided core pieces 33 in the pushback process in the thickness direction in the pushback process are provided with teeth 31b. Can be easily divided into divided cores 32.
  • the force of the component in the direction perpendicular to the laminating direction of the formed steel plate 50 is applied to the outer peripheral side of the stator core laminated body 70 to suppress peeling of the steel plates constituting the stator core laminated body 70 it can.
  • stator core laminate 70 when the stator core laminate 70 is divided into a plurality of divided cores 32, the stator core laminate 70 is perpendicular to the lamination direction at a plurality of locations on the outer peripheral side of the stator core laminate 70. Apply the component power of direction.
  • the force of the component in the vertical direction may be applied to one point on the outer peripheral side of the stator core laminate.
  • the force of the component in the vertical direction may be applied to a predetermined range in the stacking direction on the outer peripheral side of the stator core stack.
  • the stator core laminate can be more efficiently divided into the plurality of divided cores 32 by applying a force to a predetermined range in the lamination direction of the stator core laminate.
  • stator core laminated body 70 when the stator core laminated body 70 is divided into the plurality of divided cores 32, the stator core laminated body 70 is separated from each other among the plurality of divided core piece forming portions 41 annularly arranged in the circumferential direction.
  • the force of the component in the vertical direction is applied to the outer peripheral side of the stator core laminate 70 with respect to the plurality of split core piece forming portions 41.
  • the force of the component in the vertical direction may be applied to the outer peripheral side of the stator core laminate with respect to the split core piece forming portions 41 adjacent in the circumferential direction in the stator core laminate.
  • the force of the component in the vertical direction is applied to the central portion of the stator core laminate 70 in the stacking direction.
  • the force of the component in the vertical direction may be applied.
  • the stator core laminate 70 when the stator core laminate 70 is divided into a plurality of divided cores 32, the stator core laminate is used for the portion between the teeth 33b adjacent in the circumferential direction in the stator core laminate 70.
  • the force of the vertical component is applied to the outer peripheral side of 70.
  • the stator core laminate 70 has the above-described outer peripheral side of the stator core laminate 70 with respect to the boundary portion (dividing portion 44) of the plurality of divided core piece forming portions 41 annularly arranged in the circumferential direction. Apply the force of the vertical component.
  • the force of the component in the vertical direction may be applied to any position on the outer peripheral side of the stator core laminate 70 as long as the stator core laminate 70 can be divided into the plurality of divided cores 32.
  • the stator core laminate 70 is obtained by cutting the formed steel plate laminate 60 at the cutting position X in the processing step.
  • the steel plate constituting the stator core laminate may be formed. Thereby, the manufacturing process can be omitted in the method of manufacturing the stator core.
  • the motor is a so-called permanent magnet motor.
  • the rotor has a magnet.
  • the motor 1 may be a motor having no magnet, such as an induction machine, a reluctance motor, a switched reluctance motor, or a winding field type motor.
  • the manufacturing method of the above-mentioned embodiment may be applied to the manufacturing method of the lamination member by which the division part in which a plurality of plate-like division pieces were laminated was arranged annularly centering on the central axis.
  • the manufacturing method of the laminated member is a divided piece which becomes the divided piece by pushback processing of punching out a part of the steel plate in the thickness direction in the shape of the divided piece and returning the punched part back to the original position of the steel plate.
  • the divided pieces correspond to the divided core pieces 33 in the above-described embodiment, and the divided portions correspond to the divided cores 32 in the above-described embodiment.
  • stacking member is corresponded to the stator core 31 in the above-mentioned embodiment, and the said division
  • molding part is equivalent to the division
  • the present invention is applicable to a method of manufacturing a stator core in which a plurality of divided core pieces in which plate-shaped divided core pieces are stacked are annularly arranged around a central axis.

Abstract

[Problem] To provide a method for manufacturing a stator core with which a stacked body obtained by stacking a plurality of shaped steel plates in a thickness direction can be simply and easily divided. [Solution] This method for manufacturing a stator core includes: a push back step S3 of forming a shaped steel plate in which a plurality of divided core piece shaped portions which are to become divided core pieces are arranged in an annular shape, by means of a push back process in which part of a steel plate is punched out in a central axis direction in the shape of the divided core piece, after which the punched out divided core piece is returned to the original position in the steel plate; a stacked body forming step (stacking step S5 and machining step S6) of stacking the shaped steel plates in the axial direction to obtain a cylindrical stator core stacked body; and a dividing step S7 of applying to the outer peripheral side of the stator core stacked body a component force in a direction perpendicular to the stacking direction of the molded steel plates, and dividing the stator core stacked body into a plurality of divided cores.

Description

固定子コア製造方法、固定子コア製造方法によって製造された固定子コアを備えたモータ、固定子コア製造装置及び積層部材の製造方法Stator core manufacturing method, motor provided with stator core manufactured by stator core manufacturing method, stator core manufacturing device, and laminated member manufacturing method
本発明は、固定子コア製造方法、固定子コア製造方法によって製造された固定子コアを備えたモータ、固定子コア製造装置及び積層部材の製造方法に関する。 The present invention relates to a stator core manufacturing method, a motor including a stator core manufactured by the stator core manufacturing method, a stator core manufacturing apparatus, and a method of manufacturing a laminated member.
モータの固定子コアを製造する方法として、プレス装置等によって鋼板を固定子コアの形状に打ち抜いて、打ち抜かれた成形鋼板を厚み方向に複数枚積層する方法が知られている。また、固定子コアのティースに固定子コイルを巻線する際に、前記固定子コアを周方向に複数に分割することにより、前記ティースに対する前記固定子コイルの巻回数を増加させつつ作業効率を向上する方法も知られている。　 As a method of manufacturing a stator core of a motor, there is known a method of punching a steel plate into a shape of a stator core by a pressing device or the like and laminating a plurality of punched formed steel plates in a thickness direction. In addition, when the stator coil is wound around the teeth of the stator core, the stator core is divided into a plurality of pieces in the circumferential direction, thereby increasing the number of turns of the stator coil with respect to the teeth while increasing work efficiency. Ways to improve are also known.
上述のような固定子コアの製造方法として、例えば特許文献１に開示されるように、環状のプレート部材を複数枚積層して形成した固定子コアを、周方向に沿って分割して分割コアユニットを形成する、電動パワーステアリング装置用ブラシレスモータ製造方法が知られている。この製造方法では、前記分割コアユニットに対し個別に巻線を巻き付けた後、分割コアユニット同士を分割時と同じ組み合わせで再接合することにより固定子を得る。　 For example, as disclosed in Patent Document 1, as a method of manufacturing a stator core as described above, a stator core formed by laminating a plurality of annular plate members is divided along the circumferential direction to be divided cores A method of manufacturing a brushless motor for an electric power steering device, which forms a unit, is known. In this manufacturing method, after winding the winding individually on the divided core units, the divided core units are rejoined in the same combination as at the time of division to obtain a stator.
なお、前記特許文献１に開示されている製造方法では、ハーフブランク加工によってコアピースの接合部を半抜き状態にした後、該接合部をポンチ及びダイスによって押し戻す。これにより、破断面にバリが生じることなく、前記接合部を接合線に沿って切断することができる。また、前記接合部が凹凸嵌合構造を有することにより、前記接合部で分離することなく、プレート部材を厚み方向に積層することができる。 In the manufacturing method disclosed in Patent Document 1, after the joint portion of the core piece is half-blanked by half-blank processing, the joint portion is pushed back by a punch and a die. Thereby, the said junction can be cut | disconnected along a joining line, without a burr | flash producing in a torn surface. Moreover, a plate member can be laminated | stacked in the thickness direction, without isolate | separating in the said junction part because the said junction part has an uneven fitting structure.
特開２０１６－０２６４６９号公報JP, 2016-026469, A
上述の特許文献１に開示されている構成のように、鋼板をコアピース（分割コア片）の形状に打ち抜いた後、該打ち抜いた部分を前記鋼板の元の位置に戻す加工（以下、プッシュバック加工という）を用いて固定子コアを製造する場合、プッシュバック加工によって形成された成形鋼板を積層することによって得られた積層体を、複数の分割コアに分割する必要がある。　 As in the configuration disclosed in the above-mentioned Patent Document 1, after the steel plate is punched into the shape of the core piece (divided core piece), the punched portion is returned to the original position of the steel plate (hereinafter referred to as pushback processing When manufacturing a stator core using this), it is necessary to divide the layered product obtained by laminating a forming steel plate formed by push back processing into a plurality of divided cores.
前記特許文献１には開示されていないが、前記成形鋼板を厚み方向に複数枚積層することによって得られた積層体を分割する際に、該積層体の積層方向の一方の端部におけるティース間に、くさびを打ち込んで前記積層体を周方向に分割する方法が考えられる。　 Although not disclosed in the Patent Document 1, when dividing a laminate obtained by laminating a plurality of the formed steel plates in the thickness direction, the teeth between teeth at one end of the laminate in the lamination direction A method is conceivable in which the laminate is divided in the circumferential direction by driving a wedge.
しかしながら、このような分割方法では、前記積層体に対して内側から斜め外方に向かって力が加わるため、前記積層体を構成する鋼板が剥がれる可能性がある。　 However, in such a dividing method, since a force is applied to the laminate from the inside toward the diagonally outward, there is a possibility that the steel plates constituting the laminate may be peeled off.
本発明の目的は、成形鋼板を厚み方向に複数枚積層することによって得られた積層体を、該積層体を構成する鋼板が剥離することなく、簡単且つ容易に分割可能な固定子コアの製造方法を提供することにある。 An object of the present invention is to manufacture a stator core capable of easily and easily dividing a laminate obtained by laminating a plurality of formed steel plates in the thickness direction without peeling of steel plates constituting the laminate. To provide a way.
本発明の一実施形態に係る固定子コア製造方法は、板状の分割コア片が複数枚積層された分割コアが、中心軸を中心に環状に配置された固定子コアの製造方法である。この固定子コア製造方法は、鋼板の一部を前記分割コア片の形状で前記中心軸の軸方向に打ち抜いた後、該打ち抜いた前記分割コア片を前記鋼板の元の位置に戻すプッシュバック加工により、前記分割コア片となる分割コア片成形部が環状に複数並んだ成形鋼板を形成するプッシュバック工程と、前記成形鋼板を軸方向に積層して、円筒状の積層体を得る積層体形成工程と、前記積層体の外周側に対し、前記成形鋼板の積層方向に対して垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する分割工程と、を有する。 A method of manufacturing a stator core according to an embodiment of the present invention is a method of manufacturing a stator core in which a plurality of divided cores in which a plurality of plate-shaped divided core pieces are stacked are annularly arranged around a central axis. In this stator core manufacturing method, after a part of the steel plate is punched in the shape of the divided core piece in the axial direction of the central axis, pushback processing is performed to return the punched divided core piece to the original position of the steel plate. Forming a laminated steel sheet by axially laminating the molded steel plates in a pushback step of forming a formed steel plate in which a plurality of divided core piece forming portions to be the divided core pieces are annularly arranged; And a dividing step of dividing the laminated body into the plurality of divided cores by applying a force of a component in a direction perpendicular to the laminating direction of the formed steel sheet to the outer peripheral side of the laminated body.
本発明の一実施形態に係る固定子コア製造方法によれば、成形鋼板を厚み方向に複数枚積層することによって得られた積層体を、該積層体を構成する鋼板が剥離することなく、簡単且つ容易に分割することができる。 According to the stator core manufacturing method according to one embodiment of the present invention, the laminated body obtained by laminating a plurality of formed steel sheets in the thickness direction is simple without the steel plates constituting the laminated body being peeled off. And it can be divided easily.
図１は、実施形態に係るモータの概略構成を、中心軸を含む断面で模式的に示す図である。FIG. 1 is a view schematically showing a schematic configuration of a motor according to the embodiment in a cross section including a central axis. 図２は、固定子コアの概略構成を示す斜視図である。FIG. 2 is a perspective view showing a schematic configuration of a stator core. 図３は、固定子コアの製造方法を示すフローチャートである。FIG. 3 is a flowchart showing a method of manufacturing a stator core. 図４は、分割コア片成形部を成形する前の電磁鋼板の平面図である。FIG. 4 is a plan view of the electromagnetic steel sheet before forming the split core piece forming portion. 図５は、成形鋼板の概略構成を示す平面図である。FIG. 5 is a plan view showing a schematic configuration of a formed steel plate. 図６は、プッシュバック加工において、（ａ）第１工具を第２工具に対して移動させた状態、（ｂ）第１工具を元の位置に戻した状態を、それぞれ模式的に示す図である。FIG. 6 is a view schematically showing (a) a state in which the first tool is moved with respect to the second tool, and (b) a state in which the first tool is returned to the original position in pushback processing. is there. 図７は、成形鋼板が厚み方向に複数枚積層された成形鋼板積層体の概略構成を示す斜視図である。FIG. 7 is a perspective view showing a schematic configuration of a formed steel plate laminate in which a plurality of formed steel plates are stacked in the thickness direction. 図８は、切断加工後の固定子コア積層体の概略構成を示す上面図である。FIG. 8 is a top view showing a schematic configuration of a stator core laminate after cutting processing. 図９は、固定子コア分割装置の概略構成を示す上面図である。FIG. 9 is a top view showing a schematic configuration of the stator core division device. 図１０は、図９におけるＸ－Ｘ線断面図である。FIG. 10 is a cross-sectional view taken along line XX in FIG. 図１１は、図９におけるＸＩ－ＸＩ線断面図である。11 is a cross-sectional view taken along line XI-XI in FIG. 図１２は、固定子コア積層体を複数の分割コアに分割した状態を示す斜視図である。FIG. 12 is a perspective view showing a stator core laminate divided into a plurality of divided cores.
以下、図面を参照し、本発明の実施の形態を詳しく説明する。なお、図中の同一または相当部分については同一の符号を付してその説明は繰り返さない。また、各図中の構成部材の寸法は、実際の構成部材の寸法及び各構成部材の寸法比率等を忠実に表したものではない。　 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding portions in the drawings have the same reference characters allotted and description thereof will not be repeated. Further, the dimensions of the constituent members in the respective drawings do not faithfully represent the actual dimensions of the constituent members and the dimensional ratios of the respective constituent members.
なお、以下の説明では、回転子の中心軸と平行な方向を「軸方向」、中心軸に直交する方向を「径方向」、中心軸を中心とする円弧に沿う方向を「周方向」、とそれぞれ称する。ただし、この方向の定義により、本発明に係るモータの使用時の向きを限定する意図はない。　 In the following description, a direction parallel to the central axis of the rotor is "axial direction", a direction perpendicular to the central axis is "radial direction", and a direction along an arc centered on the central axis is "circumferential direction" It is called respectively. However, the definition of this direction is not intended to limit the use direction of the motor according to the present invention.
また、以下の説明において、“固定”、“接続”及び“取り付ける”等（以下、固定等）の表現は、部材同士が直接、固定等されている場合だけでなく、他の部材を介して固定等されている場合も含む。すなわち、以下の説明において、固定等の表現には、部材同士の直接的及び間接的な固定等の意味が含まれる。　 In the following description, expressions such as "fixed", "connected" and "attached" (hereinafter referred to as "fixed" etc.) are not limited to the case where members are directly fixed, etc., but also through other members. It also includes the case where it is fixed. That is, in the following description, the expression such as fixing includes the meaning such as direct and indirect fixing between members.
（モータの構成）　図１に、本発明の実施形態に係るモータ１の概略構成を示す。モータ１は、回転子２と、固定子３と、ハウジング４と、蓋板５とを備える。回転子２は、固定子３に対して、中心軸Ｐを中心として回転する。本実施形態では、モータ１は、筒状の固定子３内に、回転子２が中心軸Ｐを中心として回転可能に配置された、いわゆるインナーロータ型のモータである。　 (Configuration of Motor) FIG. 1 shows a schematic configuration of a motor 1 according to an embodiment of the present invention. The motor 1 includes a rotor 2, a stator 3, a housing 4, and a cover plate 5. The rotor 2 rotates around the central axis P with respect to the stator 3. In the present embodiment, the motor 1 is a so-called inner rotor type motor in which the rotor 2 is disposed rotatably around the central axis P in the cylindrical stator 3.
回転子２は、シャフト２０と、回転子コア２１と、マグネット２２とを備える。回転子２は、固定子３の径方向内側に配置され、固定子３に対して回転可能である。　 The rotor 2 includes a shaft 20, a rotor core 21, and a magnet 22. The rotor 2 is disposed radially inward of the stator 3 and is rotatable relative to the stator 3.
本実施形態では、回転子コア２１は、中心軸Ｐに沿って延びる円筒状である。回転子コア２１は、所定の形状に形成された電磁鋼板を、厚み方向に複数枚、積層することによって構成される。　 In the present embodiment, the rotor core 21 has a cylindrical shape extending along the central axis P. The rotor core 21 is configured by laminating a plurality of electromagnetic steel plates formed in a predetermined shape in the thickness direction.
回転子コア２１には、中心軸Ｐに沿って延びるシャフト２０が軸方向に貫通した状態で固定される。これにより、回転子コア２１は、シャフト２０とともに回転する。また、本実施形態では、回転子コア２１の外周面上には、周方向に所定の間隔で複数のマグネット２２が配置される。なお、マグネット２２は、周方向に繋がるリングマグネットであっても良い。　 A shaft 20 extending along the central axis P is fixed to the rotor core 21 in an axially penetrating state. Thereby, the rotor core 21 rotates with the shaft 20. Further, in the present embodiment, on the outer peripheral surface of the rotor core 21, the plurality of magnets 22 are disposed at predetermined intervals in the circumferential direction. The magnet 22 may be a ring magnet connected in the circumferential direction.
固定子３は、ハウジング４内に収容される。本実施形態では、固定子３は、筒状であり、径方向内側に回転子２が配置される。すなわち、固定子３は、回転子２に対して径方向に対向して配置される。回転子２は、固定子３の径方向内側に中心軸Ｐを中心として回転可能に配置される。　 The stator 3 is housed in the housing 4. In the present embodiment, the stator 3 is cylindrical, and the rotor 2 is disposed radially inward. That is, the stator 3 is disposed to face the rotor 2 in the radial direction. The rotor 2 is disposed radially inward of the stator 3 so as to be rotatable about a central axis P.
固定子３は、固定子コア３１と、固定子コイル３６と、ブラケット３７とを備える。本実施形態では、固定子コア３１は、軸方向に延びる円筒状である。固定子コア３１は、所定の形状に形成され且つ厚み方向に積層された複数枚の電磁鋼板を有する。本実施形態では、固定子コア３１は、後述するように複数の分割コア３２を有する。　 The stator 3 includes a stator core 31, a stator coil 36, and a bracket 37. In the present embodiment, the stator core 31 has a cylindrical shape extending in the axial direction. The stator core 31 has a plurality of electromagnetic steel plates formed in a predetermined shape and stacked in the thickness direction. In the present embodiment, the stator core 31 has a plurality of divided cores 32 as described later.
図２に示すように、固定子コア３１は、筒状のヨーク３１ａから径方向内側に延びる複数のティース３１ｂを有する。固定子コイル３６は、固定子コア３１のティース３１ｂに装着された絶縁材料（例えば、絶縁性の樹脂材料）からなるブラケット３７上に巻かれる。なお、ブラケット３７は、固定子コア３１の軸方向の両端面上に配置される。　 As shown in FIG. 2, the stator core 31 has a plurality of teeth 31 b extending radially inward from a cylindrical yoke 31 a. The stator coil 36 is wound on a bracket 37 made of an insulating material (for example, an insulating resin material) mounted on the teeth 31 b of the stator core 31. The brackets 37 are disposed on both axial end faces of the stator core 31.
固定子コア３１は、中心軸Ｐを中心に環状に配置された複数の分割コア３２を有する。図２に示す例では、固定子コア３１は、１２個の分割コア３２を有する。各分割コア３２は、筒状のヨーク３１ａの一部を構成する分割ヨーク部３２ａと、一つのティース３１ｂとを有する。　 The stator core 31 has a plurality of divided cores 32 disposed annularly around the central axis P. In the example shown in FIG. 2, the stator core 31 has twelve divided cores 32. Each split core 32 has a split yoke portion 32a that constitutes a part of a cylindrical yoke 31a, and one tooth 31b.
なお、固定子コア３１を構成する分割コア３２の数は、ティース３１ｂの数に応じて適宜決められる。すなわち、固定子コアのティースの数が１２個よりも多ければ、分割コアの数は１２個よりも多い。一方、固定子コアのティースの数が１２個よりも少なければ、分割コアの数は１２個よりも少ない。　 The number of divided cores 32 constituting the stator core 31 is appropriately determined according to the number of teeth 31 b. That is, if the number of teeth of the stator core is more than 12, the number of divided cores is more than 12. On the other hand, if the number of teeth in the stator core is less than 12, the number of split cores is less than 12.
分割コア３２は、複数枚積層された板状の分割コア片３３を有する。図２に示す例では、分割コア３２を構成する複数の分割コア片３３は、同じ形状を有する。分割コア片３３は、分割ヨーク部３２ａの一部を構成する分割ヨーク片３３ａと、ティース３１ｂの一部を構成するティース片３３ｂとを有する。複数の分割コア片３３は、厚み方向に積層された状態で、分割ヨーク片３３ａ及びティース片３３ｂにそれぞれ設けられたかしめ部３３ｃによって、互いに連結されている。　 The split core 32 has a plurality of plate-like split core pieces 33 stacked. In the example shown in FIG. 2, the plurality of split core pieces 33 that constitute the split core 32 have the same shape. The split core piece 33 has a split yoke piece 33a that constitutes a part of the split yoke portion 32a and a tooth piece 33b that constitutes a part of the teeth 31b. The plurality of split core pieces 33 are connected to each other by caulking portions 33 c provided on the split yoke pieces 33 a and the teeth pieces 33 b in a state of being stacked in the thickness direction.
分割ヨーク部３２ａの周方向の端部と、該分割ヨーク部３２ａと周方向に隣り合う分割ヨーク部３２ａの周方向の端部とは、接触する。これにより、複数の分割コア３２における分割ヨーク部３２ａによって、固定子コア３１の円環状のヨーク３１ａが構成される。　 The circumferential end of the divided yoke portion 32a is in contact with the circumferential end of the divided yoke portion 32a adjacent to the divided yoke portion 32a in the circumferential direction. Thus, the annular yoke 31 a of the stator core 31 is configured by the divided yoke portions 32 a of the plurality of divided cores 32.
ハウジング４は、筒状であり、中心軸Ｐに沿って延びる。本実施形態では、ハウジング４は、内部に回転子２及び固定子３を収容可能な内部空間を有する円筒状である。ハウジング４は、円筒状の側壁４ａと、側壁４ａの軸方向の一方の端部を覆う底部４ｂと、を有する。ハウジング４の軸方向の他方側の開口は、蓋板５によって覆われる。ハウジング４及び蓋板５は、例えば鉄を含む材料によって構成される。有底筒状のハウジング４の開口が蓋板５によって覆われることにより、ハウジング４の内部には内部空間が形成される。特に図示しないが、蓋板５は、ハウジング４に対して、例えば、ボルト等によって固定されてもよいし、圧入や接着などの方法によって固定されてもよい。なお、ハウジング４及び蓋板５は、鉄を含む材料に限らず、アルミニウム（アルミニウム合金を含む）などの他の材料によって構成されてもよい。　 The housing 4 is cylindrical and extends along the central axis P. In the present embodiment, the housing 4 has a cylindrical shape having an internal space capable of housing the rotor 2 and the stator 3 therein. The housing 4 has a cylindrical side wall 4a and a bottom 4b covering one axial end of the side wall 4a. The opening on the other side in the axial direction of the housing 4 is covered by a cover plate 5. The housing 4 and the cover plate 5 are made of, for example, a material containing iron. By covering the opening of the bottomed cylindrical housing 4 with the cover plate 5, an internal space is formed inside the housing 4. Although not particularly illustrated, the cover plate 5 may be fixed to the housing 4 by, for example, a bolt or the like, or may be fixed by a method such as press fitting or adhesion. In addition, the housing 4 and the cover plate 5 may be comprised not only by the material containing iron but other materials, such as aluminum (aluminium alloy is included).
（固定子コアの製造方法）　次に、上述のような構成を有する固定子コア３１の製造方法を、図３から図８を用いて説明する。　 (Method of Manufacturing Stator Core) Next, a method of manufacturing the stator core 31 having the above-described configuration will be described with reference to FIGS. 3 to 8.
図３は、固定子コア３１の製造方法の一例を示すフローチャートである。図４は、分割コア片成形部４１を成形する前の電磁鋼板４０の平面図である。図５は、分割コア片３３となる分割コア片成形部４１が成形された成形鋼板５０を示す平面図である。図６は、プッシュバック加工を模式的に示す図である。図７は、複数枚の成形鋼板５０が厚み方向に積層された成形鋼板積層体６０を示す斜視図である。図８は、成形鋼板積層体６０を切断加工することによって得られた固定子コア積層体７０を示す平面図である。　 FIG. 3 is a flowchart showing an example of a method of manufacturing the stator core 31. As shown in FIG. FIG. 4 is a plan view of the electromagnetic steel sheet 40 before the split core piece forming portion 41 is formed. FIG. 5 is a plan view showing a formed steel plate 50 in which a split core piece forming portion 41 to be the split core pieces 33 is formed. FIG. 6 is a diagram schematically showing push back processing. FIG. 7 is a perspective view showing a formed steel plate laminate 60 in which a plurality of formed steel plates 50 are stacked in the thickness direction. FIG. 8 is a plan view showing a stator core laminate 70 obtained by cutting the formed steel plate laminate 60.
最初に、磁性材料である電磁鋼板に円形の中央孔４０ａを打ち抜く。この工程が、図３に示す中央孔打ち抜き工程である（ステップＳ１）。中央孔４０ａの中心は、モータ１の中心軸Ｐと一致する。　 First, a circular central hole 40a is punched out of a magnetic steel sheet which is a magnetic material. This process is the central hole punching process shown in FIG. 3 (step S1). The center of the central hole 40 a coincides with the central axis P of the motor 1.
次に、中央孔４０ａを囲んで複数のティース片３３ｂを
形成するために、中央孔４０ａの周りに複数のスロット４０ｂを打ち抜く。この工程が、図３に示すスロット打ち抜き工程である（ステップＳ２）。　 Next, a plurality of slots 40b are punched around the central hole 40a to form a plurality of tooth pieces 33b surrounding the central hole 40a. This process is the slot punching process shown in FIG. 3 (step S2).
上述の中央孔打ち抜き工程及びスロット打ち抜き工程は、プレス加工によって行われる。中央孔打ち抜き工程及びスロット打ち抜き工程は、従来の固定子コアの製造方法と同様であるため、詳しい説明を省略する。　 The above-mentioned central hole punching process and slot punching process are performed by press working. The central hole punching process and the slot punching process are the same as those of the conventional stator core manufacturing method, and thus the detailed description is omitted.
図４に、上述のように中央孔４０ａ及びスロット４０ｂが形成された電磁鋼板４０（以下、鋼板という）を示す。　 FIG. 4 shows the electromagnetic steel sheet 40 (hereinafter referred to as a steel sheet) in which the central hole 40a and the slot 40b are formed as described above.
なお、図４に示すように、鋼板４０は、外形が所定の多角形状に打ち抜かれているとともに、外周側に複数の貫通穴４０ｃが打ち抜かれている。鋼板４０の外形の打ち抜き及び貫通穴４０ｃの打ち抜きは、上述の中央孔打ち抜き工程またはスロット打ち抜き工程と同時に行ってもよいし、中央孔打ち抜き工程及びスロット打ち抜き工程の前、または後、もしくはそれらの工程の間で行ってもよい。　 In addition, as shown in FIG. 4, while the steel plate 40 is pierced by the external shape in predetermined polygonal shape, the some through-hole 40c is pierced by the outer peripheral side. The punching of the outer shape of the steel plate 40 and the punching of the through holes 40c may be performed simultaneously with the above-mentioned central hole punching step or slot punching step, or before, after, or after the central hole punching step and slot punching step. You may go between
次に、上述のように中央孔４０ａ及びスロット４０ｂが形成された鋼板４０において、図５に示すように、中央孔４０ａの外周側に、分割コア片３３となる分割コア片成形部４１を、環状に複数並んで成形する。分割コア片成形部４１は、分割ヨーク片３３ａとなる分割ヨーク片成形部４１ａと、ティース片３３ｂとを有する。分割コア片成形部４１を成形する工程では、分割ヨーク片成形部４１ａを成形する。具体的には、分割コア片成形部４１を成形する工程では、鋼板４０において、中央孔４０ａの中心に対してティース片３３ｂよりも外側を、分割ヨーク片３３ａの形状で厚み方向に打ち抜いた後、該打ち抜いた部分を元の位置に戻す、いわゆるプッシュバック加工を行う。この工程が、図３に示すプッシュバック工程である（ステップＳ３）。　 Next, in the steel plate 40 in which the central hole 40a and the slot 40b are formed as described above, as shown in FIG. 5, the split core piece forming portion 41 to be the split core piece 33 is provided on the outer peripheral side of the central hole 40a. A plurality of rings are molded side by side. The split core piece molding portion 41 has a split yoke piece molding portion 41a to be a split yoke piece 33a and a teeth piece 33b. In the step of molding the split core piece molding portion 41, the split yoke piece molding portion 41a is molded. Specifically, in the step of forming the split core piece forming portion 41, the steel plate 40 is punched in the thickness direction with the shape of the split yoke piece 33a outside the teeth piece 33b with respect to the center of the central hole 40a. The so-called push back processing is performed to return the punched out part to its original position. This process is the push back process shown in FIG. 3 (step S3).
プッシュバック加工は、図６に示すように、鋼板４０の一部を厚み方向に挟み込む上下一対の工具を有する第１工具Ｗ１と、鋼板４０の一部を厚み方向に挟み込む上下一対の工具を有する第２工具Ｗ２とを用いて行われる。第１工具Ｗ１は、第２工具Ｗ２に対して、鋼板４０の厚み方向に移動可能である。本実施形態では、第１工具Ｗ１は、分割ヨーク片３３ａと同じ形状を有する。　 As shown in FIG. 6, push back processing has a first tool W1 having a pair of upper and lower tools sandwiching a part of a steel plate 40 in the thickness direction, and a pair of upper and lower tools sandwiching a part of the steel plate 40 in the thickness direction It is performed using the second tool W2. The first tool W1 is movable in the thickness direction of the steel plate 40 with respect to the second tool W2. In the present embodiment, the first tool W1 has the same shape as the divided yoke piece 33a.
図６（ａ）に示すように、第１工具Ｗ１が第２工具Ｗ２に対して鋼板４０の厚み方向の一方に移動することにより、鋼板４０のうち第１工具Ｗ１に挟み込まれた部分と第２工具Ｗ２に挟み込まれた部分との境界では、せん断加工が行われる。なお、第２工具Ｗ２に対する第１工具Ｗ１の移動距離は、鋼板４０を分離させる移動距離であってもよいし、鋼板４０を分離させない移動距離であってもよい。　 As shown in FIG. 6A, when the first tool W1 moves to one side in the thickness direction of the steel plate 40 with respect to the second tool W2, a portion of the steel plate 40 sandwiched by the first tool W1 and the Shearing is performed at the boundary between the two tools W2 and the part sandwiched therebetween. The moving distance of the first tool W1 with respect to the second tool W2 may be a moving distance for separating the steel plate 40, or may be a moving distance for not separating the steel plate 40.
その後、図６（ｂ）に示すように、第１工具Ｗ１を第２工具Ｗ２に対して鋼板４０の厚み方向の他方に移動させることにより、第１工具Ｗ１を元の位置に戻す。これにより、前記境界では、鋼板４０のうち第１工具Ｗ１に挟み込まれた部分が第２工具Ｗ２に挟み込まれた部分に嵌め込まれる。　 Thereafter, as shown in FIG. 6B, the first tool W1 is returned to the original position by moving the first tool W1 to the other side in the thickness direction of the steel plate 40 with respect to the second tool W2. Thereby, in the said boundary, the part pinched by 1st tool W1 among the steel plates 40 is engage | inserted by the part pinched by 2nd tool W2.
分割ヨーク片成形部４１ａは、上述のようなプッシュバック加工が行われる押出部４２と、押し出されない非押出部４３とを有する。図５に示すように、押出部４２と非押出部４３とは、周方向に交互に位置する。　 The divided yoke piece molding portion 41a has the extrusion portion 42 in which the above-described pushback processing is performed and the non-extrusion portion 43 which is not extruded. As shown in FIG. 5, the extruded portions 42 and the non-extruded portions 43 are alternately positioned in the circumferential direction.
押出部４２と、プッシュバック加工によって押し出されない部分との間には、分断部４４が形成される。すなわち、押出部４２と非押出部４３との境界、及び、押出部４２と鋼板４０の外周側との境界には、それぞれ、プッシュバック加工によって、分断部４４が形成される。分断部４４では、押出部４２が、それ以外の部分に対して摩擦によって保持される。　 A dividing portion 44 is formed between the pushing portion 42 and a portion which is not pushed out by the push back process. That is, in the boundary between the extruded portion 42 and the non-extruded portion 43 and the boundary between the extruded portion 42 and the outer peripheral side of the steel plate 40, the dividing portion 44 is formed by push back processing. In the dividing portion 44, the pushing portion 42 is held by friction with respect to the other portion.
ここで、上述のようにプッシュバック加工によって、分割コア片３３となる分割コア片成形部４１が環状に複数並んだ成形鋼板５０を形成する工程が、プッシュバック工程に対応する。　 Here, the step of forming the formed steel plate 50 in which a plurality of divided core piece forming portions 41 to be divided core pieces 33 are annularly arranged by push back processing as described above corresponds to the push back step.
以上のように、プッシュバック加工によって、分割ヨーク片成形部４１ａを成形することにより、加工時に分割ヨーク片成形部４１ａが折り曲げられない。これにより、加工による残留応力及び残留ひずみの発生を抑制できる。よって、分割コア片３３、すなわち固定子コア３１の寸法精度を高めることができる。また、上述のように残留応力及び残留ひずみの発生を抑制することにより、分割コア片３３における磁束の流れの乱れを抑制できるため、固定子コア３１の磁気特性の低下を抑制できる。　 As described above, by forming the divided yoke piece forming portion 41a by the pushback process, the divided yoke piece forming portion 41a is not bent at the time of processing. Thereby, the generation of residual stress and residual strain due to processing can be suppressed. Therefore, the dimensional accuracy of the split core pieces 33, that is, the stator core 31 can be enhanced. Further, since the disturbance of the flow of the magnetic flux in the split core piece 33 can be suppressed by suppressing the generation of the residual stress and the residual strain as described above, it is possible to suppress the deterioration of the magnetic characteristics of the stator core 31.
上述のように、プッシュバック加工によって、鋼板４０に分割ヨーク片成形部４１ａを成形した後、分割ヨーク片成形部４１ａ及びティース片３３ｂに、かしめ部３３ｃを形成する。かしめ部３３ｃは、分割ヨーク片成形部４１ａ及びティース片３３ｂに、厚み方向の一方に突出するとともに前記厚み方向他方側の面に凹部を有する凸部を形成することにより、得られる。このかしめ部３３ｃを形成する工程が、図３に示すかしめ部成形工程である（ステップＳ４）。　 As described above, after the split yoke piece forming portion 41a is formed on the steel plate 40 by push back processing, the crimped portion 33c is formed on the split yoke piece forming portion 41a and the teeth piece 33b. The caulking portion 33c is obtained by forming a convex portion having a recess on the surface on the other side in the thickness direction while protruding in one of the thickness direction on the split yoke piece forming portion 41a and the teeth piece 33b. The step of forming the caulking portion 33c is a caulking portion forming step shown in FIG. 3 (step S4).
その後、分割ヨーク片成形部４１ａが形成された成形鋼板５０を、厚み方向に積層して、隣り合う成形鋼板５０のかしめ部３３ｃをかしめることにより、図７に示すような成形鋼板積層体６０を得る。この工程が、図３に示す積層工程である（ステップＳ５）。　 Thereafter, the formed steel plate 50 in which the divided yoke piece forming portion 41a is formed is stacked in the thickness direction, and the caulking portion 33c of the adjacent formed steel plate 50 is caulked to form a formed steel plate laminate 60 as shown in FIG. Get This process is the laminating process shown in FIG. 3 (step S5).
そして、成形鋼板積層体６０を、放電加工等によって、分割ヨーク片成形部４１ａの外周側の切断位置Ｘ（図７に破線で示す位置）で切断することにより、図８に上面視で示すような固定子コア積層体７０を得る。この工程が、図３に示す加工工程である（ステップＳ６）。成形鋼板積層体６０を切断する際の切断位置Ｘは、分割ヨーク片成形部４１ａの外周端よりも内周側の位置である。　 Then, the formed steel plate laminate 60 is cut at a cutting position X (a position shown by a broken line in FIG. 7) on the outer peripheral side of the divided yoke piece forming portion 41a by electric discharge machining or the like, as shown in top view in FIG. The stator core laminate 70 is obtained. This process is a processing process shown in FIG. 3 (step S6). The cutting position X at the time of cutting the formed steel plate laminate 60 is a position on the inner peripheral side of the outer peripheral end of the divided yoke piece forming portion 41 a.
なお、成形鋼板５０を厚み方向に積層して成形鋼板積層体６０を得る積層工程、及び、成形鋼板積層体６０を切断加工して固定子コア積層体７０を得る加工工程が、積層体形成工程に対応する。　 The lamination step of laminating the formed steel plates 50 in the thickness direction to obtain the formed steel plate laminate 60, and the processing step of cutting the formed steel plate laminate 60 to obtain the stator core laminate 70 are the laminate forming steps. Corresponds to
上述のように成形鋼板積層体６０を切断位置Ｘで切断した後も、固定子コア積層体７０において隣り合う分割ヨーク片成形部４１ａの間には、分断部４４が残る。これにより、後述するように、固定子コア積層体７０を複数の分割コア３２に分割することができる。　 Even after the formed steel sheet laminate 60 is cut at the cutting position X as described above, the divided portions 44 remain between the divided yoke piece formed portions 41a adjacent to each other in the stator core laminate 70. Thereby, the stator core laminate 70 can be divided into a plurality of divided cores 32 as described later.
（固定子コア積層体の分割）　次に、固定子コア積層体７０（積層体）を複数の分割コア３２に分割する方法を、図９から図１２を用いて説明する。　 (Division of Stator Core Laminate) Next, a method of dividing the stator core laminate 70 (laminate) into a plurality of divided cores 32 will be described with reference to FIGS. 9 to 12.
図９は、固定子コア積層体７０を複数の分割コア３２に分割する固定子コア分割装置１００（固定子コア製造装置）の概略構成を示す上面図である。図１０は、図９におけるＸ－Ｘ線断面図である。図１１は、図９におけるＸＩ－ＸＩ線断面図である。図１２は、固定子コア積層体７０を複数の分割コア３２に分割した状態を示す斜視図である。　 FIG. 9 is a top view showing a schematic configuration of a stator core division device 100 (stator core manufacturing device) for dividing the stator core laminate 70 into a plurality of divided cores 32. As shown in FIG. FIG. 10 is a cross-sectional view taken along line XX in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. FIG. 12 is a perspective view showing the stator core laminate 70 divided into a plurality of divided cores 32. As shown in FIG.
固定子コア分割装置１００は、固定子コア積層体７０を保持する保持部１０１と、固定子コア積層体７０の側面に力を加える外力付与部１１０と、保持部１０１及び外力付与部１１０を支えるフレーム１２０とを備える。　 The stator core division device 100 supports the holding portion 101 holding the stator core laminate 70, the external force applying portion 110 applying a force to the side surface of the stator core laminate 70, the holding portion 101 and the external force applying portion 110. And a frame 120.
保持部１０１は、円筒状の固定子コア積層体７０の外周側の一部を、径方向に挟み込む一対の保持部材１０２を有する。一対の保持部材１０２は、ネジ１０３によって、フレーム１２０に対して進退可能である。なお、一対の保持部材１０２は、回転子コア積層体７０の外周側に接触する、上面視で円弧状の接触面１０２ａを有する。　 The holding portion 101 has a pair of holding members 102 which sandwich a part of the outer peripheral side of the cylindrical stator core laminate 70 in the radial direction. The pair of holding members 102 can be advanced and retracted with respect to the frame 120 by the screws 103. The pair of holding members 102 have contact surfaces 102 a that are arc-shaped in top view and contact the outer peripheral side of the rotor core laminate 70.
外力付与部１１０は、固定子コア積層体７０に対し、積層方向に対して垂直方向の成分の力を加えるピン１１１と、ピン１１１を進退させるアクチュエータ１１２とを有する。すなわち、外力付与部１１０のピン１１１は、保持部１０１によって保持された固定子コア積層体７０の外周側に、前記垂直方向の成分の力を加える。これにより、固定子コア積層体７０に径方向の変形を生じさせることができる。よって、固定子コア積層体７０において隣り合う分割ヨーク片成形部４１ａの間に位置する分断部４４が分離して、図１２に示すように、固定子コア積層体７０が複数の分割コア３２に分割される。　 The external force application unit 110 has a pin 111 for applying a force of a component in a direction perpendicular to the stacking direction to the stator core laminate 70, and an actuator 112 for advancing and retracting the pin 111. That is, the pin 111 of the external force applying unit 110 applies the force of the component in the vertical direction to the outer peripheral side of the stator core laminate 70 held by the holding unit 101. Thereby, the stator core laminate 70 can be deformed in the radial direction. Therefore, the divided portions 44 located between the divided yoke piece molding portions 41a adjacent to each other in the stator core laminated body 70 are separated, and the stator core laminated body 70 is divided into a plurality of divided cores 32 as shown in FIG. It is divided.
上述のように、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加えることにより、固定子コア積層体７０を構成する鋼板が剥離することを抑制しつつ、固定子コア積層体７０を複数の分割コア３２に分割することができる。　 As described above, by applying the force of the component in the vertical direction to the outer peripheral side of the stator core laminate 70, it is possible to suppress the separation of the steel plates constituting the stator core laminate 70, and to form a stator core laminate. Body 70 can be divided into multiple split cores 32.
また、特に図示しないが、固定子コア積層体７０を複数の分割コア３２に分割する際には、固定子コア積層体７０の周方向の複数個所に対し、外力付与部１１０のピン１１１によって順に前記垂直方向の成分の力を加える。これにより、固定子コア積層体７０を、複数の分割コア３２に迅速且つ容易に分割することができる。　 Further, although not particularly shown, when the stator core laminate 70 is divided into a plurality of divided cores 32, the pins 111 of the external force applying portion 110 sequentially with respect to a plurality of places in the circumferential direction of the stator core laminate 70. Apply the force of the vertical component. Thereby, the stator core laminate 70 can be divided into the plurality of divided cores 32 quickly and easily.
なお、固定子コア積層体７０の周方向の複数個所に対して前記垂直方向の成分の力を加える場合には、固定子コア積層体７０において周方向に環状に並ぶ複数の分割コア片成形部４１のうち、互いに離れた複数の分割コア片成形部４１に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加えることが好ましい。これにより、固定子コア積層体７０を、効率良く複数の分割コア３２に分割することができる。互いに離れた分割コア片成形部４１とは、周方向に隣り合わない分割コア片成形部４１を意味する。　 When the force of the component in the vertical direction is applied to a plurality of locations in the circumferential direction of the stator core laminate 70, a plurality of split core piece forming portions annularly arranged in the circumferential direction in the stator core laminate 70 It is preferable to apply the force of the component of the said perpendicular direction to the outer peripheral side of the stator core laminated body 70 with respect to the some division | segmentation core piece shaping | molding part 41 mutually separate among 41. Thus, the stator core laminate 70 can be efficiently divided into the plurality of divided cores 32. The split core piece molding portions 41 separated from each other mean the split core piece molding portions 41 which are not adjacent to each other in the circumferential direction.
本実施形態では、外力付与部１１０のピン１１１は、固定子コア積層体７０の積層方向の中央部分に対向して位置する。これにより、ピン１１１によって、固定子コア積層体７０の積層方向の中央部分に、前記垂直方向の成分の力を加えることができる。よって、固定子コア積層体７０を複数の分割コア３２に効率良く分割することができる。　 In the present embodiment, the pin 111 of the external force applying portion 110 is positioned to face the central portion of the stator core laminate 70 in the stacking direction. Thus, the force of the component in the vertical direction can be applied to the central portion of the stator core laminate 70 in the stacking direction by the pins 111. Thus, the stator core laminate 70 can be efficiently divided into the plurality of divided cores 32.
また、外力付与部１１０のピン１１１は、固定子コア積層体７０において周方向に隣り合うティース片３３ｂの間の部分に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加える。これにより、固定子コア積層体７０を、効率良く複数の分割コア３２に分割することができる。　 Further, the force of the component in the vertical direction on the outer peripheral side of the stator core laminate 70 with respect to the portion between the tooth pieces 33 b adjacent in the circumferential direction in the stator core laminate 70 in the pin 111 of the external force applying portion 110 Add Thus, the stator core laminate 70 can be efficiently divided into the plurality of divided cores 32.
本実施形態では、外力付与部１１０のピン１１１は、固定子コア積層体７０において周方向に環状に並ぶ複数の分割コア片成形部４１の境界部分（分断部４４）に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加える。これにより、固定子コア積層体７０を、より効率良く複数の分割コア３２に分割することができる。　 In the present embodiment, the pin 111 of the external force applying portion 110 is stacked on the stator core with respect to the boundary portion (the dividing portion 44) of the plurality of split core piece forming portions 41 arranged annularly in the circumferential direction in the stator core laminate 70. The force of the vertical component is applied to the outer peripheral side of the body 70. Thereby, stator core laminated body 70 can be divided into a plurality of division cores 32 more efficiently.
上述のように、固定子コア積層体７０の外周側に対し、成形鋼板５０の積層方向に対して垂直方向の成分の力を加えて、固定子コア積層体７０を複数の分割コア３２に分割する工程が、分割工程（図３のステップＳ７）に対応する。　 As described above, the force of the component in the direction perpendicular to the lamination direction of the formed steel plate 50 is applied to the outer peripheral side of the stator core laminate 70 to divide the stator core laminate 70 into a plurality of divided cores 32 The corresponding step corresponds to the dividing step (step S7 in FIG. 3).
本実施形態の構成により、プッシュバック工程で分割コア片３３の形状にプレス成形された成形鋼板５０を厚み方向に積層することによって得られた固定子コア積層体７０を、それぞれティース３１ｂを有する複数の分割コア３２に容易に分割することができる。しかも、固定子コア積層体７０の外周側に対し、成形鋼板５０の積層方向に対して垂直方向の成分の力を加えることにより、固定子コア積層体７０を構成する鋼板が剥離することを抑制できる。　 According to the configuration of the present embodiment, a plurality of stator core laminates 70 obtained by laminating formed steel plates 50 press-formed into the shape of divided core pieces 33 in the pushback process in the thickness direction in the pushback process are provided with teeth 31b. Can be easily divided into divided cores 32. In addition, the force of the component in the direction perpendicular to the laminating direction of the formed steel plate 50 is applied to the outer peripheral side of the stator core laminated body 70 to suppress peeling of the steel plates constituting the stator core laminated body 70 it can.
（その他の実施形態）　以上、本発明の実施の形態を説明したが、上述した実施の形態は本発明を実施するための例示に過ぎない。よって、上述した実施の形態に限定されることなく、その趣旨を逸脱しない範囲内で上述した実施の形態を適宜変形して実施することが可能である。　 Other Embodiments The embodiments of the present invention have been described above, but the above-described embodiments are merely examples for carrying out the present invention. Therefore, without being limited to the embodiment described above, the embodiment described above can be appropriately modified and implemented without departing from the scope of the invention.
前記実施形態では、固定子コア積層体７０を複数の分割コア３２に分割する際に、固定子コア積層体７０の外周側の複数個所に、固定子コア積層体７０の積層方向に対して垂直方向の成分の力を加える。しかしながら、固定子コア積層体の外周側の１個所に、前記垂直方向の成分の力を加えてもよい。また、固定子コア積層体の外周側における前記積層方向の所定範囲に対し、前記垂直方向の成分の力を加えてもよい。このように、固定子コア積層体の積層方向の所定範囲に対して力を加えることにより、前記固定子コア積層体を、より効率良く複数の分割コア３２に分割することができる。　 In the embodiment, when the stator core laminate 70 is divided into a plurality of divided cores 32, the stator core laminate 70 is perpendicular to the lamination direction at a plurality of locations on the outer peripheral side of the stator core laminate 70. Apply the component power of direction. However, the force of the component in the vertical direction may be applied to one point on the outer peripheral side of the stator core laminate. Also, the force of the component in the vertical direction may be applied to a predetermined range in the stacking direction on the outer peripheral side of the stator core stack. Thus, the stator core laminate can be more efficiently divided into the plurality of divided cores 32 by applying a force to a predetermined range in the lamination direction of the stator core laminate.
前記実施形態では
、固定子コア積層体７０を複数の分割コア３２に分割する際に、固定子コア積層体７０において周方向に環状に並ぶ複数の分割コア片成形部４１のうち、互いに離れた複数の分割コア片成形部４１に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加える。しかしながら、固定子コア積層体において周方向に隣り合う分割コア片成形部４１に対し、固定子コア積層体の外周側に前記垂直方向の成分の力を加えてもよい。　 In the embodiment, when the stator core laminated body 70 is divided into the plurality of divided cores 32, the stator core laminated body 70 is separated from each other among the plurality of divided core piece forming portions 41 annularly arranged in the circumferential direction. The force of the component in the vertical direction is applied to the outer peripheral side of the stator core laminate 70 with respect to the plurality of split core piece forming portions 41. However, the force of the component in the vertical direction may be applied to the outer peripheral side of the stator core laminate with respect to the split core piece forming portions 41 adjacent in the circumferential direction in the stator core laminate.
前記実施形態では、固定子コア積層体７０を複数の分割コア３２に分割する際に、固定子コア積層体７０の積層方向の中央部分に、前記垂直方向の成分の力を加える。しかしながら、固定子コア積層体７０の積層方向の中央部分以外に、前記垂直方向の成分の力を加えてもよい。　 In the embodiment, when the stator core laminate 70 is divided into the plurality of divided cores 32, the force of the component in the vertical direction is applied to the central portion of the stator core laminate 70 in the stacking direction. However, in addition to the central portion of the stator core laminate 70 in the stacking direction, the force of the component in the vertical direction may be applied.
前記実施形態では、固定子コア積層体７０を複数の分割コア３２に分割する際に、固定子コア積層体７０において周方向に隣り合うティース片３３ｂの間の部分に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加える。また、前記実施形態では、固定子コア積層体７０において周方向に環状に並ぶ複数の分割コア片成形部４１の境界部分（分断部４４）に対し、固定子コア積層体７０の外周側に前記垂直方向の成分の力を加える。しかしながら、固定子コア積層体７０を複数の分割コア３２に分割可能であれば、固定子コア積層体７０の外周側のいずれの位置に前記垂直方向の成分の力を加えてもよい。　 In the embodiment, when the stator core laminate 70 is divided into a plurality of divided cores 32, the stator core laminate is used for the portion between the teeth 33b adjacent in the circumferential direction in the stator core laminate 70. The force of the vertical component is applied to the outer peripheral side of 70. Further, in the embodiment, the stator core laminate 70 has the above-described outer peripheral side of the stator core laminate 70 with respect to the boundary portion (dividing portion 44) of the plurality of divided core piece forming portions 41 annularly arranged in the circumferential direction. Apply the force of the vertical component. However, the force of the component in the vertical direction may be applied to any position on the outer peripheral side of the stator core laminate 70 as long as the stator core laminate 70 can be divided into the plurality of divided cores 32.
前記実施形態では、加工工程において、成形鋼板積層体６０を切断位置Ｘで切断することにより、固定子コア積層体７０を得る。しかしながら、プッシュバック工程で、固定子コア積層体を構成する鋼板を形成してもよい。これにより、固定子コアの製造方法において、加工工程を省略することができる。　 In the embodiment, the stator core laminate 70 is obtained by cutting the formed steel plate laminate 60 at the cutting position X in the processing step. However, in the pushback process, the steel plate constituting the stator core laminate may be formed. Thereby, the manufacturing process can be omitted in the method of manufacturing the stator core.
前記実施形態では、モータは、いわゆる永久磁石モータである。永久磁石モータでは、回転子がマグネットを有する。しかしながら、モータ１は、誘導機、リラクタンスモータ、スイッチドリラクタンスモータ、巻線界磁型モータなどのマグネットを有さないモータであってもよい。　 In the embodiment, the motor is a so-called permanent magnet motor. In a permanent magnet motor, the rotor has a magnet. However, the motor 1 may be a motor having no magnet, such as an induction machine, a reluctance motor, a switched reluctance motor, or a winding field type motor.
前記実施形態では、モータ１の固定子コア３１の製造方法について説明しているが、これに限らず、鋼板の積層体を有する構造体を製造する際に、上述の実施形態の製造方法を適用してもよい。　 Although the said embodiment demonstrates the manufacturing method of the stator core 31 of the motor 1, when manufacturing the structure which has not only this but the laminated body of a steel plate, the manufacturing method of the above-mentioned embodiment is applied You may
すなわち、上述の実施形態の製造方法を、板状の分割片が複数枚積層された分割部が、中心軸を中心に環状に配置された積層部材の製造方法に適用してもよい。積層部材の製造方法は、鋼板の一部を前記分割片の形状で厚み方向に打ち抜いた後、該打ち抜いた部分を前記鋼板の元の位置に戻すプッシュバック加工により、前記分割片となる分割片成形部が、環状に複数並んだ成形鋼板を形成するプッシュバック工程と、前記成形鋼板を、厚み方向に積層して、筒状の積層体を得る積層体形成工程と、前記積層体の外周側に対し、前記鋼板の積層方向に対して垂直方向の成分の力を加えて、前記積層体を前記複数の分割部に分割する分割工程と、を有する。　 That is, the manufacturing method of the above-mentioned embodiment may be applied to the manufacturing method of the lamination member by which the division part in which a plurality of plate-like division pieces were laminated was arranged annularly centering on the central axis. The manufacturing method of the laminated member is a divided piece which becomes the divided piece by pushback processing of punching out a part of the steel plate in the thickness direction in the shape of the divided piece and returning the punched part back to the original position of the steel plate. A push back step of forming a plurality of forming steel plates in which a plurality of forming portions are lined in a ring, a laminate forming step of forming a cylindrical laminate by laminating the formed steel plates in a thickness direction, and an outer peripheral side of the laminate And a dividing step of dividing the laminated body into the plurality of divided portions by applying a force of a component in a direction perpendicular to the laminating direction of the steel plate.
なお、前記分割片は、上述の実施形態において分割コア片３３に相当し、前記分割部は、上述の実施形態において分割コア３２に相当する。また、前記積層部材は、上述の実施形態における固定子コア３１に相当し、前記分割片成形部は、上述の実施形態において分割コア片成形部４１に相当する。 The divided pieces correspond to the divided core pieces 33 in the above-described embodiment, and the divided portions correspond to the divided cores 32 in the above-described embodiment. Moreover, the said lamination | stacking member is corresponded to the stator core 31 in the above-mentioned embodiment, and the said division | segmentation piece shaping | molding part is equivalent to the division | segmentation core piece shaping | molding part 41 in the above-mentioned embodiment.
本発明は、板状の分割コア片が複数枚積層された分割コアが、中心軸を中心に環状に配置された固定子コアの製造方法に適用可能である。 The present invention is applicable to a method of manufacturing a stator core in which a plurality of divided core pieces in which plate-shaped divided core pieces are stacked are annularly arranged around a central axis.
１　モータ２　ロータ３　ステータ３１　固定子コア３１ａ　ヨーク３１ｂ　ティース３２　分割コア３２ａ　分割ヨーク部３３　分割コア片３３ａ　分割ヨーク片３３ｂ　ティース片３３ｃ　かしめ部４０　電磁鋼板（鋼板）４０ａ　中央孔４０ｂ　スロット４０ｃ　貫通孔４１　分割コア片成形部４１ａ　分割ヨーク片成形部４２　押出部４３　非押出部４４　分断部５０　成形鋼板６０　成形鋼板積層体７０　固定子コア積層体（積層体）１００　固定子コア分割装置（固定子コア製造装置）１０１　保持部１１０　外力付与部Ｐ　中心軸Ｗ１　第１工具Ｗ２　第２工具Ｘ　切断位置 Reference Signs List 1 motor 2 rotor 3 stator 31 stator core 31a yoke 31b teeth 32 split core 32a split yoke portion 33 split core piece 33a split yoke piece 33b teeth piece 33c caulking portion 40 electromagnetic steel plate (steel plate) 40a central hole 40b slot 40c through hole 41 Split core piece forming portion 41a Split yoke piece forming portion 42 Extrusion portion 43 Non-extrusion portion 44 Split portion 50 Forming steel plate 60 Forming steel plate laminate 70 Stator core laminate (laminate) 100 Stator core dividing device (stator core manufacture Device) 101 holding portion 110 external force applying portion P central axis W1 first tool W2 second tool X cutting position

Claims (10)

  1. 板状の分割コア片が複数枚積層された分割コアが、中心軸を中心に環状に配置された固定子コアの製造方法であって、　鋼板の一部を前記分割コア片の形状で前記中心軸の軸方向に打ち抜いた後、該打ち抜いた前記分割コア片を前記鋼板の元の位置に戻すプッシュバック加工により、前記分割コア片となる分割コア片成形部が環状に複数並んだ成形鋼板を形成するプッシュバック工程と、　前記成形鋼板を軸方向に積層して、円筒状の積層体を得る積層体形成工程と、　前記積層体の外周側に対し、前記成形鋼板の積層方向に対して垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する分割工程と、を有する、固定子コア製造方法。 A method of manufacturing a stator core in which a plurality of divided core pieces in which plate-like divided core pieces are stacked is disposed annularly around a central axis, and a part of a steel plate is formed in the shape of the divided core pieces. After punching out in the axial direction of the shaft, the divided core pieces which are punched out are returned to the original position of the steel plate by push back processing to form a formed steel plate in which a plurality of divided core piece forming portions which become the divided core pieces are annularly arranged. Forming a push-back process, laminating the formed steel plate in the axial direction to obtain a cylindrical laminated body, forming a cylindrical laminated body, perpendicular to a laminating direction of the formed steel plate with respect to an outer peripheral side of the laminated body. A dividing step of dividing the laminated body into the plurality of divided cores by applying a directional component force.
  2. 請求項１に記載の固定子コア製造方法において、　前記分割工程は、前記積層体の外周側における前記積層体の周方向の複数個所に、前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to claim 1, wherein in the dividing step, the force of the component in the vertical direction is applied to a plurality of locations in the circumferential direction of the laminate on the outer peripheral side of the laminate. A stator core manufacturing method, wherein the stator core is divided into the plurality of divided cores.
  3. 請求項２に記載の固定子コア製造方法において、　前記分割工程は、前記積層体において周方向に環状に並ぶ複数の前記分割コア片成形部のうち、互いに離れた複数の分割コア片成形部に対し、前記積層体の外周側に前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to claim 2, wherein the dividing step is performed on a plurality of divided core piece molding portions separated from each other among the plurality of divided core piece molding portions annularly arranged in the circumferential direction in the laminated body. On the other hand, the stator core manufacturing method, wherein the force of the component in the vertical direction is applied to the outer peripheral side of the laminate to divide the laminate into the plurality of divided cores.
  4. 請求項１から３のいずれか一つに記載の固定子コア製造方法において、　前記分割工程は、前記積層体の外周側における前記積層方向の所定範囲に対し、前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to any one of claims 1 to 3, wherein the dividing step applies a force of the component in the vertical direction to a predetermined range in the laminating direction on the outer peripheral side of the laminate. A stator core manufacturing method, wherein the laminate is divided into the plurality of divided cores.
  5. 請求項１から３のいずれか一つに記載の固定子コア製造方法において、　前記分割工程は、前記積層体の外周側における前記積層方向の中央部に対し、前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to any one of claims 1 to 3, wherein the dividing step applies a force of the component in the vertical direction to a central portion in the stacking direction on an outer peripheral side of the stacked body. A stator core manufacturing method, wherein the laminate is divided into the plurality of divided cores.
  6. 請求項１から５のいずれか一つに記載の固定子コア製造方法において、　前記分割コアは、周方向に延びる分割ヨーク部と、該分割ヨーク部から径方向に延びるティース部とを有し、　前記プッシュバック工程は、前記成形鋼板に、前記プッシュバック加工により、前記分割ヨーク部となる分割ヨーク片と、前記ティース部となるティース片とを形成し、　前記分割工程は、前記積層体において周方向に隣り合うティース片の間の部分に対し、前記積層体の外周側に前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to any one of claims 1 to 5, wherein the split core includes a split yoke portion extending in a circumferential direction, and a tooth portion extending in a radial direction from the split yoke portion. In the pushback step, a split yoke piece to be the split yoke portion and teeth pieces to be the teeth portion are formed by the pushback process on the formed steel plate, and the split step is performed on the periphery of the laminate. The stator core manufacturing method which applies the force of the component of the said perpendicular direction to the outer peripheral side of the said laminated body with respect to the part between the teeth pieces which adjoin in a direction, and divides | segments the said laminated body into these divided cores.
  7. 請求項１から６のいずれか一つに記載の固定子コア製造方法において、　前記分割工程は、前記積層体において周方向に環状に並ぶ複数の前記分割コア片成形部の境界部分に対し、前記積層体の外周側に前記垂直方向の成分の力を加えて、前記積層体を前記複数の分割コアに分割する、固定子コア製造方法。 The stator core manufacturing method according to any one of claims 1 to 6, wherein the dividing step is performed on the boundary portion of the plurality of divided core piece forming portions annularly arranged in the circumferential direction in the laminated body. The stator core manufacturing method which applies the force of the component of the said perpendicular direction to the outer peripheral side of a laminated body, and divides | segments the said laminated body into these several divided cores.
  8. 請求項１から７のいずれか一つに記載の固定子コア製造方法によって製造された固定子コアを備えたモータ。 A motor comprising a stator core manufactured by the stator core manufacturing method according to any one of claims 1 to 7.
  9. 請求項１から７のいずれか一つに記載の固定子コア製造方法を実現するための固定子コア製造装置であって、　前記積層体を保持する保持部と、　前記保持部によって保持された前記積層体の外周側に、前記垂直方向の成分の力を加える外力付与部と、を備える、固定子コア製造装置。 It is a stator core manufacturing device for realizing the stator core manufacturing method according to any one of claims 1 to 7, comprising: a holding unit for holding the laminated body; and the holding unit held by the holding unit. And an external force applying portion that applies the force of the component in the vertical direction on an outer peripheral side of the laminate.
  10. 板状の分割片が複数枚積層された分割部が、中心軸を中心に環状に配置された積層部材の製造方法であって、　鋼板の一部を前記分割片の形状で厚み方向に打ち抜いた後、該打ち抜いた部分を前記鋼板の元の位置に戻すプッシュバック加工により、前記分割片となる分割片成形部が、環状に複数並んだ成形鋼板を形成するプッシュバック工程と、　前記成形鋼板を、厚み方向に積層して、筒状の積層体を得る積層体形成工程と、　前記積層体の外周側に対し、前記鋼板の積層方向に対して垂直方向の成分の力を加えて、前記積層体を前記複数の分割部に分割する分割工程と、を有する、積層部材の製造方法。 It is a manufacturing method of a lamination member by which a division part in which a plurality of plate-like division pieces were laminated was arranged annularly centering on a central axis, and punched a part of steel plate in thickness direction in the shape of the division piece. Thereafter, a pushback step of forming a plurality of formed steel plates in which a plurality of divided piece forming portions serving as the divided pieces are annularly arranged by pushback processing for returning the punched out parts back to the original position of the steel plate; And laminating in a thickness direction to obtain a tubular laminate; and applying a force of a component in a direction perpendicular to the laminating direction of the steel plates to the outer peripheral side of the laminate, And D. a division step of dividing the body into the plurality of division parts.
PCT/JP2018/025009 2017-09-07 2018-07-02 Stator core manufacturing method, motor provided with stator core manufactured by stator core manufacturing method, stator core manufacturing device, and method for manufacturing stacked member WO2019049486A1 (en)

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CN113631293A (en) * 2019-03-28 2021-11-09 日本电产株式会社 Stator core plate manufacturing method, stator core plate, stator core, and mold
WO2023182257A1 (en) * 2022-03-24 2023-09-28 ニデック株式会社 Stator core manufacturing method, stator core, and motor
WO2023182256A1 (en) * 2022-03-24 2023-09-28 ニデック株式会社 Stator core manufacturing method, stator core, and motor

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