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WO2019172114A1 - Procédé de production d'un élément de noyau de rotor, et moule - Google Patents

Procédé de production d'un élément de noyau de rotor, et moule Download PDF

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Publication number
WO2019172114A1
WO2019172114A1 PCT/JP2019/008065 JP2019008065W WO2019172114A1 WO 2019172114 A1 WO2019172114 A1 WO 2019172114A1 JP 2019008065 W JP2019008065 W JP 2019008065W WO 2019172114 A1 WO2019172114 A1 WO 2019172114A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor core
core member
die
rotor
punch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/008065
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English (en)
Japanese (ja)
Inventor
武 本田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Corp
Original Assignee
Nidec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Corp filed Critical Nidec Corp
Priority to CN201980017153.8A priority Critical patent/CN111819774B/zh
Publication of WO2019172114A1 publication Critical patent/WO2019172114A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes 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 rotor core member manufacturing method and a mold.
  • a mold for forming a rotor core member of a motor from a steel plate is known.
  • This metal mold is used for the manufacturing method of the laminated iron core disclosed by patent document 1, for example.
  • a punching process, a bending process, a cutting process, a pushback process, and the like are continuously performed on a workpiece plate introduced by a feeding device using a progressive die.
  • a laminated iron core of a rotor is formed, and a processed body in which an annular portion and a fan-shaped main body portion are connected by a connecting portion is formed by the progressive die.
  • a plurality of processes (a pre-cut region is formed in the processed body) by using a progressive die in a magnet housing region in which a magnet of a rotor is housed.
  • the process is divided into a process and a process of forming a post-cut region. Note that, in the step of forming the leading region, a radially inner region of the magnet housing region is formed as the leading region. Further, in the step of forming the post punch region, a region radially outside the pre punch region in the magnet housing region is formed as the post punch region.
  • region can be reduced. Therefore, since the residual stress of the processed body obtained after punching is reduced, deformation of the laminated core on which the processed body is stacked can be suppressed.
  • the portion where the dimensional accuracy of the rotor core member is required is formed in a plurality of steps using a plurality of types of dies as in Patent Document 1 described above.
  • a step may be formed between the regions formed in each step. If it does so, the dimensional accuracy of a rotor core member may fall and it may influence a motor characteristic.
  • the objective of this invention is providing the rotor core member manufacturing method which can suppress the fall of the dimensional accuracy of a rotor core member.
  • a rotor core member manufacturing method forms a cylindrical rotor core by stacking a plurality of rotor core members, and a plurality of rotor magnet insertion holes that can accommodate a rotor magnet extend in a radial direction of the rotor core. And it is a manufacturing method of the disk-shaped rotor core member arrange
  • the rotor magnet insertion hole forming step of forming the rotor magnet insertion hole by punching a steel plate using the first punch and the first die, and the second punch and the second die are used.
  • the rotor core member manufacturing method it is possible to suppress a reduction in dimensional accuracy of the rotor core member.
  • FIG. 1 is a plan view showing an example of a rotor core member.
  • FIG. 2 is a diagram schematically showing how the rotor core member is formed by a plurality of types of molds.
  • FIG. 3 is a diagram illustrating a state in which some of the plurality of slots are formed in the process of forming the rotor core member.
  • FIG. 4 is a diagram illustrating a state in which the rotor core member is separated from the steel plate in the process of forming the rotor core member.
  • 5 is a cross-sectional view taken along line VV in FIG.
  • FIG. 6 is a perspective view showing a schematic configuration of the die.
  • FIG. 7 is a flow showing a method for manufacturing a rotor core member.
  • FIG. 8 is a plan view showing another example of the rotor core member.
  • FIG. 1 shows a schematic configuration of a rotor core member 100 formed by a mold 1 according to an embodiment of the present invention.
  • the rotor core member 100 has a disk shape.
  • a plurality of rotor core members 100 are stacked in the thickness direction to constitute a rotor core of a motor (not shown). Note that the configuration of the motor is the same as the conventional configuration, and thus the description thereof is omitted.
  • the rotor core member 100 is used for a so-called inner rotor type motor in which a rotor is rotatably disposed in a cylindrical stator. *
  • the rotor core member 100 is a plate-like member and is composed of an electromagnetic steel plate.
  • the rotor core member 100 includes an annular annular portion 110 and a plurality of core main body portions 120 extending radially outward from the annular portion 110.
  • the annular portion 110 and the plurality of core body portions 120 are a single member. *
  • the annular portion 110 has a shaft insertion hole 111 through which a shaft (not shown) passes.
  • the annular portion 110 has a plurality of first protrusions 112 and a plurality of second protrusions 113 on the outer peripheral side.
  • the plurality of first protrusions 112 and the plurality of second protrusions 113 are alternately positioned in the circumferential direction.
  • the plurality of core main body portions 120 extend radially outward from the outer periphery of the annular portion 110.
  • Each core main body 120 has a fan shape in a plan view that expands outward in the radial direction.
  • the radial direction outer peripheral side of each core main-body part 120 is circular arc shape by planar view.
  • the radially outer peripheral side of the plurality of core main body portions 120 constitutes the outer peripheral side of the rotor core member 100.
  • the core main body 120 and the annular portion 110 are connected by a connecting portion 123.
  • the connecting portion 123 is located between the first protruding portion 112 and the second protruding portion 113 on the outer periphery of the annular portion 110.
  • the width dimension of the connecting portion 123 is smaller than the width dimension of the core body portion 120.
  • the said width dimension means the dimension of the circumferential direction.
  • the core main body 120 has a through hole 121 and a caulking portion 122.
  • the through hole 121 is filled with resin in a state where a plurality of rotor core members 100 are stacked in the thickness direction. Thereby, the several rotor core member 100 laminated
  • the caulking portion 122 is a portion that is caulked in a state where the plurality of rotor core members 100 are stacked in the thickness direction. *
  • a slot 130 (rotor magnet insertion hole) in which a rotor magnet (not shown) is accommodated is positioned between the core main body portions 120 adjacent to each other in the circumferential direction. That is, the rotor core member 100 has a plurality of slots 130 arranged side by side in the circumferential direction. The slot 130 extends radially outward from the outer periphery of the annular portion 110. That is, the motor having the rotor core member 100 of the present embodiment is a so-called IPM motor (Interior Permanent Magnet Motor) in which a rotor magnet is housed in the rotor core.
  • IPM motor Interior Permanent Magnet Motor
  • the slot 130 has a rotor magnet housing part 131 that is located on the radially outer side and has a constant slot width, and a slot bottom part 132 that is located on the radially inner side and whose slot width gradually decreases toward the radially inner side.
  • the slot width means a dimension in the circumferential direction.
  • the rotor core member used in the motor is not limited to the rotor core member 100 having the above-described configuration, and may have any shape. *
  • the rotor core member 100 having the above-described configuration is formed by punching the steel plate 150 using a plurality of types of dies. That is, the rotor core member 100 is partially formed by each mold and formed into a final shape by a plurality of types of molds.
  • FIG. 2 is a diagram schematically showing how the rotor core member 100 is formed from the steel plate 150 using a plurality of types of molds 1 and 2.
  • the mold 1 forms the slot 130 of the rotor core member 100 in the steel plate 150
  • the mold 2 separates the rotor core member 100 from the steel plate 150.
  • the mold 1 has a punch 10 (first punch) and a die 20 (first die).
  • the mold 2 has a punch 30 (second punch) and a die 40 (second die).
  • the direction in which the steel plate 150 moves with respect to the plurality of types of molds 1 and 2 is indicated by solid arrows. *
  • FIG. 3 shows a state in which a part of the plurality of slots 130 is formed in the process of forming the rotor core member 100.
  • FIG. 4 shows a state where the rotor core member 100 is separated from the steel plate 150 in the process of forming the rotor core member 100.
  • FIG. 7 is a flowchart showing an outline of a method for manufacturing the rotor core member 100.
  • the manufacturing method of the rotor core member 100 will be described with reference to FIGS. 3, 4, and 7. *
  • a plurality of through holes 121 are formed in the steel plate 150 (step S1 in FIG. 7).
  • a plurality of slots 130 are formed in the steel plate 150 (step S2 in FIG. 7).
  • the entire steel sheet 130 and a pair of slits 130 a as a part of the slot 130 are alternately formed in the circumferential direction in the steel plate 150.
  • the pair of slits 130a extends parallel to the radial direction.
  • the slots 130 and the slits 130a formed in the steel plate 150 are indicated by hatching for the sake of explanation. *
  • Step S4 the outer peripheral part of the core main-body part 120 and the 2nd projection part 113 of the cyclic
  • the step shown in FIG. 4 is a step of separating the rotor core member 100 from the steel plate 150.
  • a part of the die 40 is inserted into the slot 130.
  • a part of the die 40 and the slot 130 function as a guide at the time of punching.
  • the detailed configuration of the die 40 will be described later. *
  • step S1 of FIG. 7 which forms the through-hole 121 in the steel plate 150 is a through-hole formation process.
  • step of forming the plurality of slots 130 in the steel plate 150 is a rotor magnet insertion hole forming step.
  • step S4 of FIG. 7 of forming the outer peripheral part of the core main-body part 120 in the steel plate 150 and forming the 2nd projection part 113 of the annular part 110 is a rotor core member formation process.
  • FIGS. 4 to 6 are cross-sectional views taken along line VV in FIG.
  • FIG. 6 is a perspective view showing a schematic configuration of the die 40.
  • the die 40 is a columnar member extending along the axis P.
  • the die 40 includes a through-hole 41 in which the annular portion 110 of the rotor core member 100 is positioned, and a core of the rotor core member 100 that is positioned side by side in the circumferential direction on the inner peripheral surface of the through-hole 41.
  • a plurality of grooves 42 having the same cross-sectional shape as that of the main body 120.
  • the die 40 has a plurality of protrusions 43 and 44. That is, the plurality of projecting portions 43 and 44 are positioned between the grooves 42 adjacent to each other in the circumferential direction.
  • the plurality of protrusions 43 and 44 include a first protrusion 43 that can be inserted into the slot 130 of the rotor core member 100 and a second protrusion 44 that forms the second protrusion 113 of the annular portion 110.
  • the first protrusions 43 and the second protrusions 44 are alternately positioned in the circumferential direction.
  • the through hole 41, the groove 42, the first protrusion 43, and the second protrusion 44 extend along the axis P. *
  • the first protrusion 43 and the second protrusion 44 extend from the groove bottom of the groove 42 inward in the radial direction of the die 40 when viewed from the direction in which the axis P extends.
  • the first protrusion 43 and the second protrusion 44 have the same length as the rotor magnet accommodation part 131 in the slot 130 of the rotor core member 100 in the radial direction.
  • the first protrusion 43 and the second protrusion 44 have a width dimension smaller than the slot width of the slot 130 when viewed from the direction in which the axis P extends. *
  • the first protrusion 43 is formed in the slot 130 of the rotor core member 100 when the outer periphery of the core body 120 and the second protrusion 113 of the annular portion 110 are formed by the punch 30 and the die 40. It is inserted in the entire radial direction.
  • the second projecting portion 44 has a projection forming portion 44 b that forms the second projecting portion 113 of the annular portion 110 on the radially inner side.
  • the protrusion forming portion 44b has a shape recessed outward in the radial direction when viewed from the direction in which the axis P extends.
  • the second protrusion 44 forms the second protrusion 113 of the annular portion 110 together with the punch 30 when the outer periphery of the core main body 120 and the second protrusion 113 of the annular portion 110 are formed by the punch 30 and the die 40. After that, it is inserted in the entire radial direction in the slot 130.
  • the 1st protrusion part 43 has the accommodation groove
  • the housing groove 43a and the guide portion 45 extend along the axis P.
  • the accommodation groove 43a and the guide part 45 have a rectangular cross section. *
  • the guide part 45 projects from the first projecting part 43 when viewed from the direction in which the axis P extends.
  • the guide portion 45 contacts the core main body portion 120 of the rotor core member 100 when the first protrusion 43 is inserted into the slot 130 of the rotor core member 100.
  • the guide part 45 of the die 40 and the slot 130 of the rotor core member 100 function as a guide when punching is performed by the punch 30 and the die 40.
  • the second projecting portion 44 has accommodation grooves 44 a that accommodate the guide portions 46 on both sides in the circumferential direction. That is, as shown in FIGS. 4 and 5, the guide portions 46 are located on both sides in the circumferential direction of the first projecting portion 44.
  • the accommodation groove 44 a and the guide portion 46 extend along the axis P.
  • the housing groove 44a and the guide part 46 have a rectangular cross section. *
  • the guide part 46 projects from the second projecting part 44 when viewed from the direction in which the axis P extends.
  • the guide portion 46 is inserted into the slot 130 of the rotor core member 100 when the protrusion forming portion 44b of the second protrusion 44 forms the second protrusion 113 of the annular portion 110, and the core main body portion of the rotor core member 100 is inserted.
  • Contact 120 Thereby, the guide part 46 of the die 40 and the slot 130 of the rotor core member 100 function as a guide when punching is performed by the punch 30 and the die 40.
  • the outer peripheral portion of the rotor core member 100 and the second protrusion 113 of the annular portion 110 are formed, the first protrusion 43 and the second protrusion 44 of the die 40 are placed in the slot 130 of the rotor core member 100.
  • the die 40 and the rotor core member 100 are positioned in the circumferential direction and the radial direction. Therefore, the outer peripheral part of the rotor core member 100 and the second protrusion 113 of the annular part 110 can be formed with high dimensional accuracy.
  • the rotor core member 100 formed by the punch 30 and the die 40 is stacked inside the die 40. That is, the rotor core member 100 formed by the punch 30 and the die 40 is inserted into the slot 40 in the stacked state because the first protrusion 43 and the second protrusion 44 of the die 40 are inserted into the slot 130. Retained. *
  • the first protrusion 43 and the second protrusion 44 of the die 40 have the same width dimension as viewed from the direction in which the axis P extends over a predetermined range in the direction in which the axis P extends.
  • the predetermined range is longer than the range of an effective blade that is a part that functions as a punching tool in the die 40 during punching.
  • a product holding member 50 having the same cross section as that of the die 40 is located on the opposite side of the die 40 from the punch 30.
  • the rotor core member 100 held in the die 40 is sequentially pushed out toward the product holding member 50 when the rotor core member 100 formed by the punch 30 and the die 40 is newly stacked in the die 40.
  • the rotor core member 100 laminated to a predetermined position in the product holding member 50 is carried out of the apparatus by a carry-out device (not shown) in a state where a plurality of laminated layers are laminated. Note that the rotor core member 100 is unloaded by the unloading device 60 in a state where the rotor core members 100 are stacked in the number of sheets constituting the rotor core.
  • the slot 130 is formed, and when the outer peripheral portion of the rotor core member 100 and the second protrusion 113 are formed using the punch 30 and the die 40.
  • a part of the die 40 is inserted as a guide in the entire radial direction in the slot 130.
  • the outer peripheral portion of the rotor core member 100 and the second protrusion 113 are formed while a part of the die 40 is inserted as a guide in the entire radial direction of the slot 130.
  • the dimensional accuracy when forming the outer peripheral portion of the rotor core member 100 and the second protrusion 113 can be ensured.
  • the through hole 121 of the rotor core member 100 is formed.
  • the outer peripheral portion of the rotor core member 100 and the second protrusion 113 are formed by the punch 30 and the die 40 after the slot 130 and the through hole 121 are formed.
  • the slot 130 and the outer periphery of the rotor core member 100 are simultaneously formed in the rotor core member 100 in which the through holes 121 are formed, distortion is likely to occur around the through holes 121.
  • a part of the die 40 is inserted as a guide in the entire radial direction of the rotor core member 100 in the slot 130, so that distortion occurs around the through hole 121. Therefore, the outer peripheral portion of the rotor core member 100 can be formed with high accuracy.
  • the die 40 includes guide portions 45 and 46 that contact the inner surface of the slot 130 of the rotor core member 100. Thereby, when forming the outer peripheral part of the rotor core member 100 and the 2nd projection part 113, the die
  • a part of the die 40 is inserted into the slot 130 of the rotor core member 100 as a guide.
  • a part of the punch may be inserted into the slot as a guide.
  • the slot 130 is formed after the through hole 121 is formed in the steel plate 150.
  • the through hole may be formed after the slot is formed in the steel plate.
  • the annular portion 110 and the plurality of core main body portions 120 are a single member.
  • the plurality of core main body portions 220 may be separate members from the annular portion 210 (first rotor core member). That is, the plurality of core main body portions 220 may be divided into a plurality of members in the circumferential direction.
  • the rotor core member 200 in which the plurality of core main body portions 220 are divided into a plurality of members in the circumferential direction is laminated together with the rotor core member 100 to constitute a part of the rotor core. *
  • the core main body portion 220 is formed when the outer peripheral portion of the rotor core member 200 and the second protrusion 213 are formed. Is difficult to position. Even in this case, the core main body 220 can be easily positioned by inserting the die into the slot 230 as a guide as in the above embodiment.
  • reference numeral 212 denotes a first protrusion.
  • the present invention is applicable to a method of manufacturing a disk-shaped rotor core member in which a plurality of slots capable of accommodating a rotor magnet extend in the radial direction and are arranged side by side in the circumferential direction.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un procédé de production d'un élément de noyau de rotor avec lequel il est possible de limiter une chute de précision dimensionnelle de l'élément de noyau de rotor. La solution selon l'invention porte sur un procédé de fabrication d'un élément de noyau de rotor qui est un procédé de production d'un élément de noyau de rotor en forme de disque (100), dont une pluralité est utilisée pour constituer un noyau de rotor par empilement, l'élément de noyau de rotor ayant une pluralité de fentes (130) qui peuvent recevoir des aimants de rotor, qui s'étendent dans la direction radiale du noyau de rotor, et qui sont disposées autour de la direction circonférentielle du noyau de rotor. Le procédé de production d'élément de noyau de rotor comprend : une étape de formation de trou d'insertion d'aimant de rotor dans laquelle un poinçon et une matrice (40) sont utilisés pour poinçonner une feuille d'acier (150) afin de former une fente (130) ; et une étape de formation d'élément de noyau de rotor dans laquelle, lorsque le poinçon et la matrice (40) sont utilisés pour former d'autres parties de l'élément de noyau de rotor (100), la matrice (40) est partiellement insérée en tant que guide dans la totalité de la fente (130) dans la direction radiale.
PCT/JP2019/008065 2018-03-08 2019-03-01 Procédé de production d'un élément de noyau de rotor, et moule Ceased WO2019172114A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980017153.8A CN111819774B (zh) 2018-03-08 2019-03-01 转子铁芯部件制造方法以及模具

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018041667 2018-03-08
JP2018-041667 2018-03-08

Publications (1)

Publication Number Publication Date
WO2019172114A1 true WO2019172114A1 (fr) 2019-09-12

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PCT/JP2019/008065 Ceased WO2019172114A1 (fr) 2018-03-08 2019-03-01 Procédé de production d'un élément de noyau de rotor, et moule

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WO (1) WO2019172114A1 (fr)

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JP2009195099A (ja) * 2008-01-15 2009-08-27 Nissan Motor Co Ltd 積層鉄心の製造装置および製造方法並びに積層鉄心
JP2012034497A (ja) * 2010-07-30 2012-02-16 Kuroda Precision Ind Ltd 鉄心薄板製造装置
JP2013090386A (ja) * 2011-10-14 2013-05-13 Toyota Boshoku Corp 回転電機用コアの製造方法及びコア板の打ち抜き装置
JP2017005945A (ja) * 2015-06-15 2017-01-05 トヨタ紡織株式会社 金属板の打ち抜き方法及び金属板の打ち抜きシステム

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CN111819774B (zh) 2023-05-12
CN111819774A (zh) 2020-10-23

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