JP2009247169A - Method of manufacturing stator core - Google Patents
Method of manufacturing stator core Download PDFInfo
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- JP2009247169A JP2009247169A JP2008092820A JP2008092820A JP2009247169A JP 2009247169 A JP2009247169 A JP 2009247169A JP 2008092820 A JP2008092820 A JP 2008092820A JP 2008092820 A JP2008092820 A JP 2008092820A JP 2009247169 A JP2009247169 A JP 2009247169A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000004080 punching Methods 0.000 claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 239000011162 core material Substances 0.000 description 53
- 238000004804 winding Methods 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture Of Motors, Generators (AREA)
Abstract
Description
本発明は、ステータコアの製造方法及びそのステータコアを備える電動機に関する。 The present invention relates to a stator core manufacturing method and an electric motor including the stator core.
電動機の固定子鉄心片を打抜き形成した際、内側に発生するスクラップにより鉄心用材料の板取り歩留りが著しく低下する問題を解決すべく、金属板から積層固定子鉄心を直線状に展開した形状の帯状鉄心片９１を打抜き形成し、この帯状鉄心片を螺旋状に巻回して積層することによって、鉄心用材料の板取り歩留りを向上した積層固定子鉄心９を製造する方法が提供されている（例えば、特許文献１参照）。 In order to solve the problem that the yield of the core material is significantly reduced due to the scrap generated inside when the stator core piece of the motor is punched and formed, the shape of the laminated stator core that has been developed in a straight line from the metal plate There is provided a method for manufacturing a laminated stator core 9 in which the yield of the core material is improved by punching and forming the strip-shaped core piece 91 and spirally winding and stacking the strip-shaped core pieces (see FIG. For example, see Patent Document 1).
上記略直線状の帯状鉄心片９１を製造する場合には、帯状板材を一方向に直線状に案内する案内手段と、帯状板材から鉄心を打ち抜くパンチ（ポンチ）と、該パンチの下方に配置されたダイとを具えた鉄心の製造装置を用いている。 このような従来の製造装置では、帯状板材が案内手段によってダイ上に案内されると、パンチが駆動してダイ内に侵入し、これにより帯板から鉄心が打ち抜かれる。 When manufacturing the substantially straight strip-shaped iron core piece 91, a guide means for guiding the strip-shaped plate material linearly in one direction, a punch for punching the iron core from the strip-shaped plate material, and a punch is disposed below the punch. An iron core manufacturing device equipped with a die is used. In such a conventional manufacturing apparatus, when the strip-shaped plate material is guided onto the die by the guide means, the punch is driven to enter the die, and thereby the iron core is punched from the strip.
しかし、上記した従来の製造方法においては、帯状鉄心片のバックヨーク部分が連結されているため、歩留まりを向上すべく帯状鉄心片９１Ａと９１Ｂを向かい合うように配置して打ち抜きすると、帯状板材の短手方向の幅（フープ幅）を大きくせざるを得なかった。従って、フープ幅が大きいために鉄心の製造装置を小さくすることに限界があった。特に高出力を発生する電動機に組み込まれる積層鉄心の製造装置の場合に問題であった。 However, in the above-described conventional manufacturing method, since the back yoke portions of the strip-shaped core pieces are connected, if the strip-shaped core pieces 91A and 91B are arranged so as to face each other in order to improve the yield, the strip-shaped plate material is shortened. The width in the hand direction (hoop width) had to be increased. Therefore, since the hoop width is large, there is a limit to reducing the iron core manufacturing apparatus. This is a problem particularly in the case of a laminated iron core manufacturing apparatus incorporated in an electric motor that generates high output.
また、上記した帯状鉄心片９１は、バックヨーク部分が連結されているため、螺旋状に巻回して積層する際に、曲げられたバックヨーク部分が元に戻ろうとする力（いわゆるスプリングバック）が発生するため、真円に巻回していくことが困難であるという問題もあった。 In addition, since the above-described band-shaped iron core piece 91 is connected to the back yoke portion, when it is spirally wound and laminated, a force (so-called spring back) is applied to the bent back yoke portion to return to the original state. Since this occurs, there is also a problem that it is difficult to wind it in a perfect circle.
一方、隣接するティース部間でバックヨーク部が切断された、1つのティースを有する積層部材を積層した分割コアを環状に配列して積層固定子鉄心を製造する方法が知られている。この製造方法によればスプリングバックが発生しないため、真円の積層固定子鉄心を得ることが出来る（例えば、特許文献２参照）。 On the other hand, there is known a method of manufacturing a laminated stator core by annularly arranging divided cores obtained by laminating laminated members having one tooth, with back yoke portions cut between adjacent teeth portions. According to this manufacturing method, since a spring back does not occur, a perfect circle laminated stator core can be obtained (see, for example, Patent Document 2).
しかし、上記した従来の製造方法においては、打ち抜き加工の基準ガイドとして帯状板材に打ち抜かれたパイロット孔１１が、帯状板材の短手方向（幅方向）両端部に設けられているうえ、分割コアを構成する積層部材が帯状板材の幅方向に多段に配置された状態で打ち抜かれているため、フープ幅が大きくなってしまうという問題が残されていた。さらに、積層部材に案内凸部１２Ａ、１２Ｂが設けられているため、隣接して打ち抜かれる積層部材１０Ａ、１０Ｂ同士を近づけて打ち抜くことが出来ず、材料取りが悪化するという問題があった。
本発明は、上述した課題を解決するためになされたものであって、その目的は、材料歩留まりを向上させつつ、帯状板材のフープ幅を狭くできるステータコアの製造方法を提供することにある。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for manufacturing a stator core capable of reducing the hoop width of a strip-shaped plate material while improving the material yield.
上記目的を達成するため、本発明は以下に示すいくつかの特徴を備えている。請求項１に記載の発明は、帯状板材を送り出してバックヨーク片とティース片と延鉄片とを備える積層部材を順次打ち抜く工程と、前記積層部材をカシメ積層してコア部材を形成する工程と、同コア部材を環状に配置してステータコアを製造する工程とを備え、前記積層部材を打ち抜くにあたり、先に打ち抜かれる積層部材のティース片と後に打ち抜かれる積層部材のバックヨーク片とが、帯状板材の長手方向において同一直線上に位置するように打ち抜き、かつ、積層部材の延鉄片と打ち抜き加工の基準ガイドであるパイロット孔とが帯状板材の長手方向において同一直線上に位置するように打ち抜くと共に、バックヨーク片及び／又はティース片に平坦部を設けるように打ち抜くことを特徴としている。 In order to achieve the above object, the present invention has the following features. The invention according to claim 1 is a step of feeding a strip-shaped plate material and sequentially punching a laminated member including a back yoke piece, a tooth piece, and an extended iron piece, and a step of caulking and laminating the laminated member to form a core member; A step of manufacturing the stator core by annularly arranging the core member, and when punching the laminated member, the teeth of the laminated member punched first and the back yoke piece of the laminated member punched later are Punching so that the longitudinal direction of the strip member is located on the same straight line and the pilot hole as a reference guide for punching is punched so that it is located on the same straight line in the longitudinal direction of the belt The yoke piece and / or the teeth piece are punched so as to provide a flat portion.
請求項２に記載の発明は、上記請求項１において前記バックヨーク片のステータコア円周方向の一端に凸部を設け、他端に凹部を設けると共に、前記凸部は、前記一端の略中央からステータコア内径側に亘る領域内に設けるように打ち抜くことを特徴としている。 According to a second aspect of the present invention, in the first aspect of the present invention, a convex portion is provided at one end in the circumferential direction of the stator core of the back yoke piece, and a concave portion is provided at the other end. It is characterized by being punched out so as to be provided in a region extending on the stator core inner diameter side.
請求項１に記載の発明によれば、バックヨーク片とティース片とを一体に形成しつつ、フープ幅を出来るだけ小さくすることができるため、生産性を向上しつつ材料取りを良くすることが可能となる。また、材料となる帯状板材（電磁鋼板からなるロール）も小さいものとなるため材料費を抑えることが出来る。さらに、材料の取り扱い易さ（輸送や在庫管理）が高まる。 According to the first aspect of the present invention, since the hoop width can be made as small as possible while integrally forming the back yoke piece and the teeth piece, it is possible to improve material productivity while improving productivity. It becomes possible. Moreover, since the strip | belt-shaped board | plate material (roll which consists of electromagnetic steel plates) used as a material also becomes small, material cost can be held down. Furthermore, the ease of handling of materials (transportation and inventory management) increases.
請求項２に記載の発明によれば、バックヨーク片のステータコア円周方向の一端に凸部を設け、他端に凹部を設けると共に、前記凸部は、前記一端の略中央からステータコア内径側に亘る領域内に設けるため、材料取りを悪化させずに凹凸を設けることが可能となる。 According to the second aspect of the present invention, the convex portion is provided at one end of the back yoke piece in the circumferential direction of the stator core, the concave portion is provided at the other end, and the convex portion extends from the substantially center of the one end to the stator core inner diameter side. Since it is provided in a region that extends, it is possible to provide unevenness without deteriorating material collection.
（第1実施形態）
次に、本発明の実施形態について図面を参照しながら説明する。図１〜図３は本発明に関わる電動機の製造方法における一実施例を示しており、本発明に基づいて製造された電動機１は、ステータ２と、ステータ２の内側に配置されるロータ（図示略）と、ブラケットとを備えて構成されている。
(First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a method for manufacturing an electric motor according to the present invention. An electric motor 1 manufactured based on the present invention includes a stator 2 and a rotor (illustrated) disposed inside the stator 2. Abbreviation) and a bracket.
ステータ２は、外周が円状で内周が多角形状の円筒状ブラケット３内に配設され、インシュレータ５を介して巻線４が巻装されるステータコア６を備えている。このステータコア６は、積層鋼板を積層して構成され、ブラケット３の内周に固定されるバックヨーク８とこのバックヨーク８から径方向内側に向かって延びる複数の巻胴部７２とティース７とを備えている。ティース７は周方向に等角度間隔に設けられており、各巻胴部７２には、巻線４が集中巻にて巻回されている。巻線４は、図示しない電源装置に接続されており、この電源装置から電力の供給を受けて、回転磁界を発生させることで、ロータ（図示略）を回転させる。 The stator 2 is provided in a cylindrical bracket 3 having a circular outer periphery and a polygonal inner periphery, and includes a stator core 6 around which a winding 4 is wound via an insulator 5. The stator core 6 is configured by laminating laminated steel plates, and includes a back yoke 8 fixed to the inner periphery of the bracket 3, a plurality of winding drums 72 and teeth 7 extending radially inward from the back yoke 8. I have. The teeth 7 are provided at equiangular intervals in the circumferential direction, and the winding 4 is wound around each winding body 72 by concentrated winding. The winding 4 is connected to a power supply device (not shown), and receives a supply of power from the power supply device to generate a rotating magnetic field, thereby rotating a rotor (not shown).
ステータコア６は、ティース７とバックヨーク８と巻胴部７２とを有する複数のコア部材２２から構成されている。各コア部材２２は、ティース片２３１とバックヨーク片２３２と延鉄片２３４とを有する積層部材２３が、カシメ部２３３でカシメ積層されて形成されている。そして、このコア部材２２にインシュレータ５を介して巻胴部７２に巻線４が巻装して形成されて分割コア２１が形成される。 The stator core 6 includes a plurality of core members 22 each having a tooth 7, a back yoke 8, and a winding body 72. Each core member 22 is formed by caulking and laminating a laminating member 23 having a tooth piece 231, a back yoke piece 232, and an extended iron piece 234 at a caulking portion 233. Then, the winding core 4 is wound around the core member 22 via the insulator 5 to form the split core 21.
コア部材２２を形成する積層部材２３は、図３に示すように、帯状板材２４の短手方向一端に帯状板材長手方向に向かって延在するバックヨーク片２３２と、このバックヨーク片２３２の略中央部から帯状板材の短手方向他端に向かって延びる延鉄片２３４と、帯状板材２４の短手方向他端に帯状板材長手方向に延在するティース片２３１とから構成される。 As shown in FIG. 3, the laminated member 23 forming the core member 22 includes a back yoke piece 232 extending toward the longitudinal direction of the strip plate at one end in the short direction of the strip plate 24, and substantially the back yoke piece 232. It is composed of an extended iron piece 234 that extends from the central portion toward the other end in the short direction of the strip-shaped plate member, and a tooth piece 231 that extends in the longitudinal direction at the other end in the short-side direction of the strip-shaped plate member 24.
次に、上記のように構成されたステータコアの製造方法について説明する。 Next, the manufacturing method of the stator core comprised as mentioned above is demonstrated.
まず積層部材２３が帯状板材２４から打ち抜かれる打ち抜き手順について説明する。まず渦巻状に巻回された電磁鋼板（図示略）からなる帯状板材２４が、案内手段（図示略）により一方向に直線状にプレス機（図示略）へ送り出される。そして、プレス機に設けられる各打抜ステージ（図示略）によりパイロット孔２４１、カシメ部２３３、積層部材２４の外形が順次打ち抜き又は形成されていく。 First, a punching procedure in which the laminated member 23 is punched from the strip-shaped plate member 24 will be described. First, a belt-like plate material 24 made of an electromagnetic steel plate (not shown) wound in a spiral shape is fed linearly in one direction to a press machine (not shown) by guide means (not shown). Then, the outer shapes of the pilot hole 241, the crimping portion 233, and the laminated member 24 are sequentially punched or formed by each punching stage (not shown) provided in the press machine.
帯状板材２４から積層部材２３の外形が打ち抜かれると、積層部材２４は、先に打ち抜かれた積層部材と前記カシメ部２３３によりカシメ積層されてコア部材２２を構成する。 When the outer shape of the laminated member 23 is punched from the belt-shaped plate member 24, the laminated member 24 is caulked and laminated by the previously punched laminated member and the caulking portion 233 to constitute the core member 22.
ここで、本発明による積層部材２３の打ち抜きについて図３を用いてより詳細に述べる。図３に示すように、積層部材２３は上下が反転して状態で順次打ち抜かれていく。すなわち、隣り合って打ち抜かれる積層部材のティース片２３１とバックヨーク片２３２とが、帯状板材２４の長手方向で微小間隔離間して同一直線上に位置するように、積層部材２３の外形が打ち抜かれていく。 Here, the punching of the laminated member 23 according to the present invention will be described in more detail with reference to FIG. As shown in FIG. 3, the laminated member 23 is sequentially punched in a state where the top and bottom are reversed. In other words, the outer shape of the laminated member 23 is punched so that the teeth 231 and the back yoke piece 232 of the laminated member that are punched adjacent to each other are positioned on the same straight line with a small gap in the longitudinal direction of the strip-shaped plate member 24 To go.
ここで、帯状板材の短手方向一側面２４２と他側面２４３は、ティース片内径側端部２３１１とバックヨーク片外径側端部２３２１を構成するようになっている。 Here, one side surface 242 and the other side surface 243 in the short direction of the belt-shaped plate material constitute a tooth piece inner diameter side end portion 2311 and a back yoke piece outer diameter side end portion 2321.
また、前記パイロット孔２４１は、帯状板材２４のフープ幅のほぼ中央辺り、すなわちティース片２３１とバックヨーク片２３２とで囲まれた、積層部材２３として使用されない廃材部分に打ち抜かれる。 Further, the pilot hole 241 is punched into a waste material portion that is not used as the laminated member 23 and is surrounded by the teeth piece 231 and the back yoke piece 232 around the center of the hoop width of the belt-like plate member 24.
このように積層部材２３が打ち抜かれることで、帯状板材のフープ幅は、積層部材２３径方向幅（ティース片内径側端部２３１１からバックヨーク片外径側端部２３２１までの幅）と略同一となり、フープ幅を非常に小さくすることが可能となる。フープ幅が小さくできれば、その分だけ材料歩留まりが向上する。また、帯状板材のもととなる、渦巻状に巻回された電磁鋼板（図示略）も小さく、軽くなり、取り扱いが容易となると共に、積層部材２３の材料コストを抑えられる。 By punching the laminated member 23 in this way, the hoop width of the belt-like plate material is substantially the same as the radial width of the laminated member 23 (the width from the teeth piece inner diameter side end portion 2311 to the back yoke piece outer diameter side end portion 2321). Thus, the hoop width can be made very small. If the hoop width can be reduced, the material yield is improved accordingly. In addition, the electromagnetic steel sheet (not shown) wound in a spiral shape, which is the base of the belt-shaped plate material, is also small and light, and can be handled easily, and the material cost of the laminated member 23 can be suppressed.
また、本実施例により製造される積層部材２３のティース片内径側端部２３１１とバックヨーク片外径側端部２３２１には、帯状板材の短手方向一側面２４２と他側面２４３とがそのまま用いられている。従って、この積層部材２３を積層したコア部材２２からなるステータ２のティース面７１及びバックヨーク８は、断面が多角形状となる。 In addition, one side surface 242 and the other side surface 243 of the strip-shaped plate material are used as they are for the teeth piece inner diameter side end portion 2311 and the back yoke piece outer diameter side end portion 2321 of the laminated member 23 manufactured according to the present embodiment. It has been. Therefore, the cross section of the teeth surface 71 and the back yoke 8 of the stator 2 made of the core member 22 in which the laminated members 23 are laminated has a polygonal shape.
このようにバックヨーク８が多角形状となると、ステータ２をブラケット３に挿入する際の位置決めを容易にすることが可能となる。また、ティース面７１が多角形状となると、ティース面７１とロータ外周面（図示略）との径方向距離を不均一とすることができるため、永久磁石型電動機の場合にロータ極間で生じるコギングトルクを小さくすることが可能となる。 When the back yoke 8 has a polygonal shape as described above, positioning when the stator 2 is inserted into the bracket 3 can be facilitated. Further, when the tooth surface 71 has a polygonal shape, the radial distance between the tooth surface 71 and the outer peripheral surface of the rotor (not shown) can be non-uniform, so that cogging generated between the rotor poles in the case of a permanent magnet type motor. The torque can be reduced.
次に、本発明の他の実施形態について図４、図５を参照しながら説明する。なお、上記第１実施形態と同一の構成については同一の符号を付して説明を省略し、以下、異なる構成についてのみ説明を行う。
（第２実施形態）
本発明の第２実施形態を図４に基づいて説明する。本実施形態では積層部材２３のティース片２３１とバックヨーク片２３２形状が、前記第１実施形態と異なるため、この部分を中心に述べる。
Next, another embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as the said 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted and only a different structure is demonstrated hereafter.
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In this embodiment, since the shape of the teeth piece 231 and the back yoke piece 232 of the laminated member 23 is different from that of the first embodiment, this portion will be mainly described.
積層してステータ２のバックヨーク８を形成するバックヨーク片２３２には、その外径側端部２３２１の両端に切欠部２３２２、２３２３が設けられている。また、積層してステータティース面７１を形成するティース片２３１の内径側端部２３１１にも切欠部２３１２が設けられている。 The back yoke piece 232 that is laminated to form the back yoke 8 of the stator 2 is provided with notches 2322 and 2323 at both ends of the outer diameter side end 2321 thereof. In addition, a notch portion 2312 is also provided at an inner diameter side end portion 2311 of the tooth piece 231 that is stacked to form the stator teeth surface 71.
上記外径側端部２３２１の両端の切欠部２３２２、２３２３は湾曲しており、その曲率半径はブラケット３の内周面の半径と略同一となるように構成されている。これにより、本実施例の積層部材２３からなるステータ２は、上記切欠部２３２２、２３２３がブラケット内周面３３と当接部３１で接すると共に、上記平坦部２３２１とブラケット内周面３３とは非接触の状態となり、空隙部３２ができる。 The notches 2322 and 2323 at both ends of the outer diameter side end 2321 are curved, and the radius of curvature is configured to be substantially the same as the radius of the inner peripheral surface of the bracket 3. Thus, in the stator 2 including the laminated member 23 of the present embodiment, the notches 2322 and 2323 are in contact with the bracket inner peripheral surface 33 at the contact portion 31 and the flat portion 2321 and the bracket inner peripheral surface 33 are not in contact with each other. It will be in a contact state and the space | gap part 32 will be made.
上記空隙部３２が設けられると、電動機駆動時にステータコア６が振動するような場合に、振動がブラケット３に伝わりにくくなり、ブラケット３を含めたモータ全体の振動・騒音が抑えられる。また、本実施例のステータ２をコンプレッサー用の電動機に適用した場合、上記空隙部３２をコンプレッサー圧縮部の潤滑用油の通路として利用することも可能となる。 When the gap portion 32 is provided, when the stator core 6 vibrates when the electric motor is driven, the vibration is not easily transmitted to the bracket 3 and the vibration and noise of the entire motor including the bracket 3 can be suppressed. Further, when the stator 2 of the present embodiment is applied to an electric motor for a compressor, the gap portion 32 can be used as a lubricating oil passage for the compressor compression portion.
上記外径側端部２３２１の両端の切欠２３２２、２３２３と同様に、内径側端部２３１１の切欠部２３１２も湾曲している。この曲率半径の中心は、回転軸の中心と同じになるようにされている。これにより、ロータ外周面（図示略）を円状に構成すれば、ティース面７１とロータ外周面（図示略）との径方向距離を均一とすることが可能になる。
（第３実施形態）
本発明の第３実施形態を図５に基づいて説明する。本実施形態では積層部材２３のティース片２３１とバックヨーク片２３２形状が、前記各実施形態と異なるため、この部分を中心に述べる。
Similar to the notches 2322 and 2323 at both ends of the outer diameter side end portion 2321, the notch portion 2312 of the inner diameter side end portion 2311 is also curved. The center of the radius of curvature is the same as the center of the rotation axis. Thereby, if the rotor outer peripheral surface (not shown) is formed in a circular shape, the radial distance between the tooth surface 71 and the rotor outer peripheral surface (not shown) can be made uniform.
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. In this embodiment, since the shape of the teeth piece 231 and the back yoke piece 232 of the laminated member 23 is different from those of the above embodiments, this portion will be mainly described.
図５に示すように、積層してステータ２のバックヨーク８を形成するバックヨーク片２３２には、その外径側端部２３２１の両端に切欠部２３２２、２３２３が設けられている。さらに、バックヨーク片２３２の周方向の一端の略中央に凸部２３２５が設けられ、他端には前記凸部に対応する凹部２３２６が設けられている。 As shown in FIG. 5, the back yoke piece 232 that is laminated to form the back yoke 8 of the stator 2 is provided with notches 2322 and 2323 at both ends of the outer diameter side end portion 2321 thereof. Further, a convex portion 2325 is provided at substantially the center of one end in the circumferential direction of the back yoke piece 232, and a concave portion 2326 corresponding to the convex portion is provided at the other end.
一方、ティース片２３１は、内径側端部２３１１に切欠部２３１２が設けられていると共に、周方向に向かって先細りとなる形状となっている。 On the other hand, the teeth piece 231 is provided with a notch 2312 at the inner diameter side end 2311 and has a shape that tapers in the circumferential direction.
図５（ｂ）から分かるように、上記凸部２３２５は、隣接するコア部材２２の凹部２３２６に係合するように形成されているため、ステータコア６を環状状態で保持することが可能となる。これにより、コア部材２２によりステータコア６を形成する際にコア部材２２同士を環状に保持することが容易となり、電動機の生産性が飛躍的に向上する。つまり、ステータコア６をブラケット３に挿入する場合や樹脂成形用金型（図示略）に設置する場合に、コア部材２２毎に取り扱うのではなく、ステータコア６全体として取り扱うことができ、生産性が飛躍的に向上できる。 As can be seen from FIG. 5B, the convex portion 2325 is formed so as to engage with the concave portion 2326 of the adjacent core member 22, so that the stator core 6 can be held in an annular state. Thereby, when forming the stator core 6 with the core member 22, it becomes easy to hold | maintain core members 22 cyclically | annularly, and productivity of an electric motor improves dramatically. In other words, when the stator core 6 is inserted into the bracket 3 or installed in a resin molding die (not shown), the stator core 6 can be handled as a whole, rather than being handled for each core member 22, and productivity is greatly increased. Can be improved.
但し、積層部材２３に上記凸部２３２５を設けると、その凸部があるために隣接して打ち抜かれる積層部材２３と間隔を広げる必要がでてくる。これに対し本実施例では、隣接する積層部材２３との間隔を広げることなく上記凸部２３２５を設けるために、図５（ａ）に示すように、ティース片２３１の形状を周方向で先細りする形状としている。 However, when the protrusion 2325 is provided on the laminated member 23, it is necessary to widen the distance from the laminated member 23 that is punched adjacently due to the protrusion. On the other hand, in this embodiment, in order to provide the convex portion 2325 without increasing the interval between the adjacent laminated members 23, the shape of the tooth piece 231 is tapered in the circumferential direction as shown in FIG. It has a shape.
上記のようにティース片２３１の形状が周方向で先細りしているため、このティース片２３１と、同ティース片２３１を備える積層部材２３と隣接して打ち抜かれる積層部材２３のバックヨーク片２３２周方向の一端との間に、凸部２３２５を打ち抜くためのスペースができる。 Since the shape of the tooth piece 231 is tapered in the circumferential direction as described above, the back yoke piece 232 in the circumferential direction of the tooth piece 231 and the laminated member 23 punched adjacent to the laminated member 23 provided with the tooth piece 231. A space for punching out the convex portion 2325 is formed between one end of the protrusion 2325 and the other end.
ここで、ティース片２３１とバックヨーク片２３２とが帯状板材２４の長手方向において同一直線上に位置すると共に、帯状板材２４の短手方向中央付近にパイロット孔２４１が設けられている。従って、上記スペースは、バックヨーク片２３２周方向の一端の略中央から帯状板材２４の短手方向中央付近に存在することになるため、前記凸部２３２５は、前記一端の略中央からステータコア６内径側に亘る領域内に設けることがより望ましい。 Here, the teeth piece 231 and the back yoke piece 232 are positioned on the same straight line in the longitudinal direction of the strip-shaped plate member 24, and a pilot hole 241 is provided near the center of the strip-shaped plate member 24 in the short direction. Therefore, since the space exists from the approximate center of one end of the back yoke piece 232 in the circumferential direction to the vicinity of the center of the strip-shaped plate member 24 in the short direction, the convex portion 2325 has an inner diameter of the stator core 6 from the approximate center of the one end. It is more desirable to provide in the region extending to the side.
従って、本実施例によれば、隣接する積層部材２３との間隔を広げることなく上記凸部２３２５を設けることが可能となり、材料歩留まりを悪化させることがない。 Therefore, according to the present embodiment, the convex portion 2325 can be provided without increasing the interval between the adjacent laminated members 23, and the material yield is not deteriorated.
なお、本実施例ではティース片２３１の形状は周方向で先細りとしているが、ティース片２３１の形状はこれに限られず、隣接する積層部材の凸部を打ち抜くためのスペースを確保できる限りにおいて、適宜変更することが可能である。
また、上記各実施例は、ステータ２の内径側にロータ（図示略）を設ける、いわゆるインナーロータ型電動機を用いて説明したが、本発明はこれに限られず、ステータの外径側にロータを設けるアウターロータ型電動機にも適用することが可能である。
In this embodiment, the shape of the teeth piece 231 is tapered in the circumferential direction. However, the shape of the teeth piece 231 is not limited to this, as long as a space for punching the convex portion of the adjacent laminated member can be secured. It is possible to change.
Moreover, although each said Example demonstrated using what was called an inner rotor type | mold electric motor which provides a rotor (not shown) in the inner diameter side of the stator 2, this invention is not limited to this, A rotor is provided in the outer diameter side of a stator. The present invention can also be applied to the provided outer rotor type electric motor.
１ 電動機
２ ステータ
２１ａ〜２１ｌ 分割コア
２２ コア部材
２３ 積層部材
２３１ ティース片
２３１１ ティース片内径側端部
２３１２ 切欠部
２３２ バックヨーク片
２３２１ バックヨーク片外径側端部
２３２２ 、２３２３ 切欠部
２３３ カシメ部
２３４ 延鉄片
２４ 帯状板材
２４１ パイロット孔
３ ブラケット
３１ 当接部
３２ 空隙部
３３ 内周面
４ 巻線
５ インシュレータ
６ ステータコア
７ ティース
７１ ティース面
７２ 巻胴部
８ バックヨーク
９ 積層固定子鉄心
９１ 帯状鉄心片
DESCRIPTION OF SYMBOLS 1 Electric motor 2 Stator 21a-21l Split core 22 Core member 23 Laminated member 231 Teeth piece 2311 Teeth piece inner diameter side edge part 2312 Notch part 232 Back yoke piece 2321 Back yoke piece outer diameter side edge part 2322, 2323 Notch part 233 Caulking part 234 Extended iron piece 24 Strip-like plate material 241 Pilot hole 3 Bracket 31 Abutting part 32 Gap part 33 Inner peripheral surface 4 Winding 5 Insulator 6 Stator core 7 Teeth 71 Teeth surface 72 Winding body part 8 Back yoke 9 Laminated stator core 91 Banded iron core piece
Claims (2)
前記積層部材を打ち抜くにあたり、先に打ち抜かれる積層部材のティース片と後に打ち抜かれる積層部材のバックヨーク片とが、帯状板材の長手方向において同一直線上に位置するように打ち抜き、かつ、
積層部材の延鉄片と打ち抜き加工の基準ガイドであるパイロット孔とが帯状板材の長手方向において同一直線上に位置するように打ち抜くと共に
バックヨーク片及び／又はティース片に平坦部を設けるように打ち抜くことを特徴とするステータコア製造方法。
A step of feeding a belt-like plate material and sequentially punching a laminated member including a back yoke piece, a tooth piece, and an iron piece; a step of caulking and laminating the laminated member to form a core member; and arranging the core member in an annular shape. A step of manufacturing a stator core,
When punching the laminated member, the tooth piece of the laminated member that is punched first and the back yoke piece of the laminated member that is punched later are punched so as to be located on the same straight line in the longitudinal direction of the belt-shaped plate material, and
Punching is performed so that the extended iron piece of the laminated member and the pilot hole which is the reference guide for the punching process are positioned on the same straight line in the longitudinal direction of the strip-shaped plate material, and the back yoke piece and / or the tooth piece are provided with a flat portion. The stator core manufacturing method characterized by these.
前記凸部は、前記一端の略中央からステータコア内径側に亘る領域内に設けるように打ち抜くことを特徴とする請求項１記載のステータコア製造方法 A convex portion is provided at one end of the back yoke piece in the circumferential direction of the stator core, a concave portion is provided at the other end, and
The stator core manufacturing method according to claim 1, wherein the convex portion is punched so as to be provided in a region extending from a substantially center of the one end to an inner diameter side of the stator core.
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| WO2012033302A2 (en) * | 2010-09-08 | 2012-03-15 | 주식회사 아모텍 | Method for manufacturing a segmented stator, and stator using same |
| WO2014000070A2 (en) * | 2012-06-29 | 2014-01-03 | Whirlpool S.A. | Laminar segment for electric motor segmented stator |
| JP2016226140A (en) * | 2015-05-29 | 2016-12-28 | 日産自動車株式会社 | Core piece manufacturing device |
| CN107532955A (en) * | 2015-04-13 | 2018-01-02 | Lg伊诺特有限公司 | Torque sensor module, steering angle sensing device and manufacturing method for stators |
| JP2020092522A (en) * | 2018-12-06 | 2020-06-11 | 三菱電機株式会社 | Method for manufacturing laminated core |
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| CN115765227A (en) * | 2022-11-18 | 2023-03-07 | 南通通达矽钢冲压科技有限公司 | Self-adhesion pole shoe iron core structure with high material utilization rate |
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| EP2316612A2 (en) | 2009-10-28 | 2011-05-04 | Jtekt Corporation | Grinding machine and grinding method |
| WO2012033302A2 (en) * | 2010-09-08 | 2012-03-15 | 주식회사 아모텍 | Method for manufacturing a segmented stator, and stator using same |
| WO2012033302A3 (en) * | 2010-09-08 | 2012-05-03 | 주식회사 아모텍 | Method for manufacturing a segmented stator, and stator using same |
| WO2014000070A2 (en) * | 2012-06-29 | 2014-01-03 | Whirlpool S.A. | Laminar segment for electric motor segmented stator |
| WO2014000070A3 (en) * | 2012-06-29 | 2014-05-01 | Whirlpool S.A. | Laminar segment for electric motor segmented stator |
| JP2015521833A (en) * | 2012-06-29 | 2015-07-30 | ワールプール・エシ・ア | Layered segment for segmented stator of electric motor |
| JP2018511804A (en) * | 2015-04-13 | 2018-04-26 | エルジー イノテック カンパニー リミテッド | Torque sensor module, steering angle sensing device, and electric steering device |
| CN107532955A (en) * | 2015-04-13 | 2018-01-02 | Lg伊诺特有限公司 | Torque sensor module, steering angle sensing device and manufacturing method for stators |
| CN107532955B (en) * | 2015-04-13 | 2020-10-02 | Lg伊诺特有限公司 | Torque sensor module, steering angle sensor device, and stator manufacturing method |
| JP2016226140A (en) * | 2015-05-29 | 2016-12-28 | 日産自動車株式会社 | Core piece manufacturing device |
| JP2020092522A (en) * | 2018-12-06 | 2020-06-11 | 三菱電機株式会社 | Method for manufacturing laminated core |
| JP7209522B2 (en) | 2018-12-06 | 2023-01-20 | 三菱電機株式会社 | Laminated core manufacturing method |
| WO2022137621A1 (en) * | 2020-12-24 | 2022-06-30 | 三菱電機株式会社 | Split core, dynamo-electric machine, method for manufacturing split core, and method for manufacturing dynamo-electric machine |
| JPWO2022137621A1 (en) * | 2020-12-24 | 2022-06-30 | ||
| JP7357811B2 (en) | 2020-12-24 | 2023-10-06 | 三菱電機株式会社 | Split core, rotating electrical machine, split core manufacturing method, and rotating electrical machine manufacturing method |
| CN115765227A (en) * | 2022-11-18 | 2023-03-07 | 南通通达矽钢冲压科技有限公司 | Self-adhesion pole shoe iron core structure with high material utilization rate |
| CN115765227B (en) * | 2022-11-18 | 2024-02-02 | 南通通达矽钢冲压科技有限公司 | Self-adhesion pole shoe iron core structure with high material utilization rate |
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