JP2010028929A - Laminated iron core and manufacturing method therefor - Google Patents

Laminated iron core and manufacturing method therefor Download PDF

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JP2010028929A
JP2010028929A JP2008185186A JP2008185186A JP2010028929A JP 2010028929 A JP2010028929 A JP 2010028929A JP 2008185186 A JP2008185186 A JP 2008185186A JP 2008185186 A JP2008185186 A JP 2008185186A JP 2010028929 A JP2010028929 A JP 2010028929A
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JP5139903B2 (en
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Kazuhiko Umeda
和彦 梅田
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Mitsui High Tec Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated iron core which supports the split laminated iron cores, arranged in an annular fashion only with annular iron core pieces arranged above or below, while facilitating the removal thereof, and to provide a manufacturing method for the core. <P>SOLUTION: In a laminated iron core 10 where a plurality of split laminated iron cores 15 and 17 are laminated, while being caulked with a first caulking portion 14 interposed therebetween, and an annular iron core piece 12 is laminated on either the upper end side or the lower end side of the split laminated iron cores 11 arranged annularly, while being caulked with a second caulking portion 20, interposed therebetween for preventing the split laminated iron cores 11 arranged in an annular fashion from being collapsed or split, the annular iron core piece 12 couples the end side of the pole piece portion 22 and the yoke piece portion 21 in the circumferential direction, and projects from the inside diameter circle on the inside of the split laminated iron cores 11 arranged inside an annular fashion. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、主としてモータの固定子又は回転子に使用される積層鉄心及びその製造方法に係り、特に、複数の分割積層鉄心を組み合わせて構成される積層鉄心の取扱いを容易にする積層鉄心及びその製造方法に関する。 The present invention relates to a laminated core mainly used for a stator or a rotor of a motor and a manufacturing method thereof, and more particularly to a laminated core that facilitates handling of a laminated core constituted by combining a plurality of divided laminated cores and the same. It relates to a manufacturing method.

従来、環状の鉄心片を円周方向に複数分割した分割鉄心片を、プレス金型を用いて切り曲げとプッシュバック（例えば、特許文献１参照）を使用して環状一体で打ち抜き形成し、金型内で組み立てる積層鉄心及びその製造方法が提案されていた。ところが、このような積層鉄心で、隣り合う分割積層鉄心が連結されていないものでは、プレス金型から排出後は僅かな力でも環状形態が崩れて、積層鉄心がバラバラになるので、取り扱いが極めて面倒であるという問題があった。
そこで、特許文献２に記載のように、積層鉄心の上下端部の鉄心片のみを分割しない一体の環状鉄心片として形成することにより、外部からの力を受けても環状形態を保持できるようにするなどの対策を施していた。 Conventionally, a split core piece obtained by dividing a ring-shaped core piece into a plurality of parts in the circumferential direction is cut and formed by using a press die and by using a press die (see, for example, Patent Document 1). A laminated iron core assembled in a mold and a method for manufacturing the same have been proposed. However, in such a laminated core in which adjacent divided laminated cores are not connected, the annular form collapses even after slight force from the press mold, and the laminated cores are separated, so handling is extremely difficult. There was a problem of being troublesome.
Therefore, as described in Patent Document 2, by forming only the core pieces at the upper and lower ends of the laminated core as an integral annular core piece so that the annular form can be maintained even when subjected to external force. Measures such as doing were taken.

特開２００６−０４２５２０号公報JP 2006-042520 A 特開２００８−９２７７０号公報JP 2008-92770 A

しかしながら、特許文献２記載の技術においては、積層鉄心をバラバラに分離させて各分割積層鉄心毎に巻線を行うため、上下の環状鉄心片は巻線の前に剥ぎ取らなければならず、剥ぎ取った上下の環状鉄心片は廃棄処分するため、材料の歩留りを低下させていた。これは省資源の観点からも好ましくない。さらには、環状鉄心片が上下端部の双方に配置されていることや、剥ぎ取るための起点が特に設けられていないために、環状鉄心片の剥ぎ取りに作業者が手間と時間を要していた。 However, in the technique described in Patent Document 2, since the laminated core is separated into pieces and winding is performed for each divided laminated core, the upper and lower annular core pieces must be peeled off before the winding. Since the upper and lower annular core pieces taken are discarded, the yield of the material is lowered. This is not preferable from the viewpoint of resource saving. Furthermore, since the annular core pieces are arranged on both the upper and lower ends and there is no particular starting point for peeling off, the worker takes time and effort to remove the annular core pieces. It was.

また、積層鉄心では打ち抜き時の残留ひずみを除去するために焼鈍を行うものもあるが、焼鈍の際には積層鉄心を各分割積層鉄心毎にバラバラにした状態にしてトレイ上に敷き詰め、炉内を搬送させつつ焼鈍を行っており、このとき搬送時の振動により分割積層鉄心が転倒したりズレたりして、炉内で引っ掛かりを起こすなどの搬送トラブルを発生させており、焼鈍の生産性を低下させる要因にもなっていた。 In addition, some laminated cores are annealed to remove residual strain at the time of punching, but at the time of annealing, the laminated cores are spread apart on each tray and placed on the tray. In this case, the divisional laminated iron core falls over and slips due to vibration during transportation, causing troubles such as catching in the furnace. It was also a factor to decrease.

本発明はかかる事情に鑑みてなされたもので、環状に配置された分割積層鉄心の支持を上又は下に配置された環状鉄心片でのみ行い、更にその取り外しも容易である積層鉄心及びその製造方法を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a laminated core that is supported only by an annular core piece arranged at the top or bottom, and that can be easily removed, and the production thereof. It aims to provide a method.

前記目的に沿う第１の発明に係る積層鉄心は、複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の上端側及び下端側のいずれか一方に環状鉄心片を第２のかしめ部を介してかしめ積層し、環状配置した前記分割積層鉄心の形崩れ及び分割防止を図った積層鉄心であって、前記環状鉄心片は、磁極片部の先側及びヨーク片部が円周方向に連結している。 The laminated core according to the first aspect of the present invention that meets the above-mentioned object has a ring shape on either the upper end side or the lower end side of the divided laminated core in which a plurality of divided core pieces are caulked and laminated via the first caulking portion. A laminated core in which iron core pieces are caulked and laminated via a second caulking portion to prevent the divided laminated iron cores from being deformed and prevented from being divided, and the annular core pieces are arranged on the front side of the magnetic pole pieces and The yoke pieces are connected in the circumferential direction.

ここで、第１の発明に係る積層鉄心において、前記環状鉄心片は環状配置された前記分割鉄心片より内径が小さく形成され、環状配置された前記分割積層鉄心の中心側に突出する突出部が設けられているのが好ましい。 Here, in the laminated core according to the first aspect of the present invention, the annular core piece is formed to have an inner diameter smaller than the annularly arranged divided core pieces, and a projecting portion protruding toward the center of the annularly arranged divided laminated core is provided. Preferably it is provided.

また、第１の発明に係る積層鉄心において、前記環状鉄心片の内径は、環状配置された前記分割鉄心片の内側部分の鉄心片から形成される回転子鉄心の外径と同一であるのが好ましい。
第１の発明に係る積層鉄心において、前記環状鉄心片に形成された前記第２のかしめ部のかしめ突起は、前記分割鉄心片に形成された前記第１のかしめ部のかしめ突起より、その突出量が小であるのが好ましい。ここで、前記環状鉄心片は前記ヨーク片部に形成されたかしめ突起のみで前記分割鉄心片とかしめ結合しているのがよい。 In the laminated core according to the first aspect of the invention, the inner diameter of the annular core piece is the same as the outer diameter of the rotor core formed from the inner core piece of the annularly arranged split core piece. preferable.
In the laminated iron core according to the first invention, the caulking projection of the second caulking portion formed on the annular core piece protrudes beyond the caulking projection of the first caulking portion formed on the divided iron core piece. A small amount is preferred. Here, it is preferable that the annular core piece is caulked and joined to the divided core piece only by caulking projections formed on the yoke piece portion.

第１の発明に係る積層鉄心において、前記環状鉄心片を前記分割鉄心片に積層連結する前記第２のかしめ部のかしめ代は、前記分割鉄心片同士を積層連結する前記第１のかしめ部のかしめ代より小さくすることもでき、これによって、環状鉄心片の取り外しが容易となる。なお、かしめ代を小さくするとは具体的には、かしめ突起とかしめ用凹部（かしめ用貫通孔の場合もある）とが当接する〔面積×荷重〕を小さくすることである。 In the laminated core according to the first aspect of the present invention, the caulking allowance of the second caulking portion for laminating and connecting the annular core pieces to the divided core pieces is the same as that of the first caulking portion for laminating and connecting the divided core pieces. It is also possible to make it smaller than the caulking allowance, which makes it easy to remove the annular core piece. Specifically, reducing the caulking allowance means reducing the [area × load] at which the caulking protrusion and the caulking concave portion (which may be a caulking through hole) abut.

そして、第１の発明に係る積層鉄心において、前記第１のかしめ部と前記第２のかしめ部は平面視して同一位置にあるのが製造上好ましいが、前記第１のかしめ部と前記第２のかしめ部は平面視して異なる位置に設けることも可能である。
第１の発明に係る積層鉄心において、前記環状鉄心片には複数の貫通孔が設けられているのがより好ましい。 In the laminated iron core according to the first aspect of the invention, the first caulking portion and the second caulking portion are preferably in the same position in plan view, but the first caulking portion and the second caulking portion are the same. The two caulking portions can be provided at different positions in plan view.
In the laminated core according to the first invention, it is more preferable that the annular core piece is provided with a plurality of through holes.

前記目的に沿う第２の発明に係る積層鉄心の製造方法は、複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の上端側に環状鉄心片を第２のかしめ部を介してかしめ積層した積層鉄心をプレス金型装置で製造する方法であって、
被加工板から打ち抜いて環状に配置された複数の前記分割鉄心片を、前記第１のかしめ部を介し必要枚数を積層して前記分割積層鉄心を形成する第１工程と、
環状配置された前記分割積層鉄心の上に、前記被加工板からヨーク片部及び磁極片部の先側が円周方向に連結するように打ち抜き形成された前記環状鉄心片を前記第２のかしめ部を介して積層する第２工程とを有し、
前記プレス金型装置から、環状配置された前記分割積層鉄心が前記環状鉄心片で接続補強された状態で排出される。 The method for manufacturing a laminated core according to the second aspect of the present invention is characterized in that a plurality of divided core pieces are caulked and laminated via a first caulking portion, and the annular core piece is placed on the upper end side of the divided laminated core. A method of manufacturing a laminated iron core that has been caulked and laminated through two caulking portions with a press mold apparatus,
A first step of forming the divided laminated core by laminating a required number of the plurality of divided core pieces, which are punched out from the work plate and arranged in an annular shape, via the first caulking portion;
The second caulking portion is formed by punching the annular core piece, which is formed so as to be connected to the front side of the yoke piece portion and the magnetic pole piece portion from the work plate in the circumferential direction on the annularly arranged laminated core. And a second step of laminating via
From the press die device, the annularly arranged laminated cores arranged in an annular shape are discharged in a state of being connected and reinforced by the annular core pieces.

また、前記目的に沿う第３の発明に係る積層鉄心の製造方法は、複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の下端側に環状鉄心片を第２のかしめ部を介してかしめ積層した積層鉄心をプレス金型装置で製造する方法であって、
被加工板からヨーク片部及び磁極片部の先側が円周方向に連結するように前記環状鉄心片を打ち抜き形成する第１工程と、
前記環状鉄心片の上に、前記被加工板から打ち抜いて環状に配置された複数の前記分割鉄心片を、前記第２、第１のかしめ部を介して必要枚数を積層して前記分割積層鉄心を形成する第２工程とを有し、
前記プレス金型装置から、環状配置された前記分割積層鉄心が前記環状鉄心片で接続補強された状態で排出される。 The method for manufacturing a laminated core according to the third aspect of the present invention is characterized in that a plurality of divided core pieces are caulked and laminated via a first caulking portion, and the annular core piece is arranged on the lower end side of the divided laminated core. Is a method of manufacturing a laminated iron core obtained by caulking and laminating via a second caulking portion with a press mold apparatus,
A first step of punching and forming the annular core piece so that the tip side of the yoke piece part and the magnetic pole piece part are connected in the circumferential direction from the work plate;
On the annular core piece, a plurality of the divided core pieces, which are punched from the work plate and arranged in an annular shape, are stacked in a necessary number via the second and first caulking portions, and the divided laminated core is provided. A second step of forming
From the press die device, the annularly arranged laminated cores arranged in an annular shape are discharged in a state of being connected and reinforced by the annular core pieces.

第２、第３の発明に係る積層鉄心の製造方法において、前記環状鉄心片は環状配置された前記分割鉄心片より内径が小さくなるように打ち抜きを行い、該積層鉄心の中心側に突出する突出部を形成するのが好ましい。ここで、前記環状鉄心片に形成した前記突出部を起点に環状配置された前記分割積層鉄心から前記環状鉄心片を剥ぎ取るようにするのがよい。 In the method for manufacturing a laminated core according to the second and third inventions, the annular core piece is punched so that an inner diameter is smaller than that of the annularly arranged divided core pieces, and protrudes toward the center side of the laminated core. The part is preferably formed. Here, it is preferable that the annular core piece is peeled off from the divided laminated core that is annularly arranged starting from the projecting portion formed on the annular core piece.

第２、第３の発明に係る積層鉄心の製造方法において、前記環状鉄心片の内径は、環状配置された前記分割鉄心片の内側部分の鉄心片から形成される回転子鉄心の外径と同一であるのがよい。 In the method for manufacturing a laminated core according to the second and third inventions, the inner diameter of the annular core piece is the same as the outer diameter of the rotor core formed from the inner core piece of the annularly arranged split core piece. It is good to be.

また、第２、第３の発明に係る積層鉄心の製造方法において、前記環状鉄心片に形成された前記第２のかしめ部のかしめ突起は、前記分割鉄心片に形成された前記第１のかしめ部のかしめ突起より、その突出量が小であるのが好ましい。この場合、前記環状鉄心片は前記ヨーク片部に形成されたかしめ突起のみで前記分割鉄心片とかしめ結合しているのがよい。 Moreover, in the manufacturing method of the laminated core according to the second and third inventions, the caulking projection of the second caulking portion formed on the annular core piece is the first caulking formed on the divided core piece. The amount of protrusion is preferably smaller than the caulking protrusion of the portion. In this case, it is preferable that the annular core piece is caulked and joined to the divided core piece only by caulking projections formed on the yoke piece portion.

更に、第２、第３の発明に係る積層鉄心の製造方法において、前記環状鉄心片には複数の貫通孔が設けられているのがより好ましい。 Furthermore, in the manufacturing method of the laminated core according to the second and third inventions, it is more preferable that the annular core piece is provided with a plurality of through holes.

そして、第２、第３の発明に係る積層鉄心の製造方法において、前記プレス金型装置から排出された該積層鉄心が、前記環状鉄心片で補強された状態で焼鈍されるのが好ましい。 And in the manufacturing method of the laminated iron core which concerns on 2nd, 3rd invention, it is preferable that this laminated iron core discharged | emitted from the said press die apparatus is annealed in the state reinforced with the said annular iron core piece.

請求項１〜９記載の積層鉄心及び請求項１０〜１８記載の積層鉄心の製造方法においては以下のような効果を有する。
（１）環状鉄心片はヨーク片部と磁極片部の先側とが円周方向に連結した一体構造であるので、外力に対して強固であり、分割積層鉄心の上下端部の一方のみに配置した場合でも、分割積層鉄心の環状形態を維持できる。 The method for producing the laminated core according to any one of claims 1 to 9 and the laminated core according to claims 10 to 18 have the following effects.
(1) Since the annular core piece has an integral structure in which the yoke piece portion and the tip side of the magnetic pole piece portion are connected in the circumferential direction, it is strong against external force and only on one of the upper and lower ends of the divided laminated core. Even when arranged, the annular form of the split laminated core can be maintained.

（２）環状鉄心片が積層鉄心の上下のいずれか一方にのみ配置されるので、従来に比べ廃棄される鉄心材の量を削減することができる。
（３）環状鉄心片の内径（内径円）を環状配置された分割積層鉄心の内径より中心側に突出させており、この突出部を環状鉄心片の剥ぎ取りの起点とすることができるので、剥ぎ取りの作業性が向上し、しかも環状鉄心片は、分割積層鉄心の上下いずれか一方のみであるから、作業時間が短縮される。 (2) Since the annular core pieces are disposed only on either one of the upper and lower sides of the laminated core, the amount of the iron core material discarded can be reduced as compared with the conventional case.
(3) Since the inner diameter (inner diameter circle) of the annular core piece is projected to the center side from the inner diameter of the annularly arranged laminated core, this projecting portion can be used as a starting point for stripping the annular core piece. The stripping workability is improved, and the annular core pieces are only one of the upper and lower parts of the divided laminated core, so that the working time is shortened.

（４）環状鉄心片に貫通孔を設けた場合には、この貫通孔を利用して貫通孔に嵌入するピンを備えた自動機（例えば、環状鉄心片の除去装置）により環状鉄心片の剥ぎ取りの自動化又は半自動化ができる。
（５）環状に配置された分割積層鉄心は、環状鉄心片で補強されているので、焼鈍を行う場合も炉内で各分割積層鉄心が転倒したりズレたりせず、炉内の引っ掛かり等による搬送トラブルを無くすことができる。 (4) When a through-hole is provided in the annular core piece, the annular core piece is peeled off by an automatic machine (for example, an annular core piece removing device) provided with a pin that fits into the through-hole using the through-hole. It can be automated or semi-automated.
(5) Since the divided laminated cores arranged in an annular shape are reinforced by the annular core pieces, each divided laminated iron core does not fall down or slip in the furnace even when annealing is performed, and is caused by a catch in the furnace. Transport trouble can be eliminated.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
ここで、図１、図２は本発明の第１の実施の形態に係る積層鉄心の斜視図、図３は同正断面図、図４は同拡大部分断面図である。図５は同積層鉄心の製造方法の説明図、図６は本発明の第２の実施の形態に係る積層鉄心の拡大部分断面図、図７は本発明の第３の実施の形態に係る積層鉄心の正断面図、図８は同部分断面図である。 Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 and FIG. 2 are perspective views of the laminated core according to the first embodiment of the present invention, FIG. 3 is a front sectional view thereof, and FIG. 4 is an enlarged partial sectional view thereof. FIG. 5 is an explanatory view of the method for manufacturing the laminated core, FIG. 6 is an enlarged partial cross-sectional view of the laminated core according to the second embodiment of the present invention, and FIG. 7 is a multilayer according to the third embodiment of the present invention. A front sectional view of the iron core, FIG. 8 is a partial sectional view thereof.

図１〜図４に示すように、本発明の第１の実施の形態に係る積層鉄心１０は、環状配置された複数（この実施の形態では８）の分割積層鉄心１１と、環状配置された分割積層鉄心１１の上端に配置される環状鉄心片１２とを有している。以下、これらについて詳しく説明する。 As shown in FIG. 1 to FIG. 4, the laminated core 10 according to the first embodiment of the present invention has a plurality of (8 in this embodiment) divided laminated cores 11 arranged in an annular shape and an annular arrangement. And an annular core piece 12 disposed at the upper end of the divided laminated core 11. These will be described in detail below.

図２、図４に示すように、分割積層鉄心１１は環状のヨーク部を各磁極部１３毎に分割したもので、各分割鉄心片１５、１７は複数の第１のかしめ部１４によってかしめ結合されている。このかしめ部１４は最下部の分割鉄心片１５においては、矩形の貫通孔１６からなって、その上部に配置される分割鉄心片１７では、下側に側面視してＶ字状のかしめ突起を有するＶ字かしめ１８となっている。
なお、最上部に配置される環状鉄心片１２の直下に配置される分割鉄心片１７には、Ｖ字かしめ１８とは別位置（ヨーク片部がよい）に矩形の貫通孔１９が形成され、上部に載置される環状鉄心片１２のＶ字かしめ２０がかしめ接合するようになっている。このＶ字かしめ２０は下側に側面視してＶ字状のかしめ突起を有している。 As shown in FIGS. 2 and 4, the divided laminated iron core 11 is obtained by dividing an annular yoke part for each magnetic pole part 13, and each divided iron core piece 15, 17 is caulked and joined by a plurality of first caulked parts 14. Has been. The caulking portion 14 is formed of a rectangular through hole 16 in the lowermost divided core piece 15, and the divided core piece 17 disposed at the upper portion thereof has a V-shaped caulking projection as viewed from the lower side. It has V-shaped caulking 18.
In addition, a rectangular through-hole 19 is formed at a position different from the V-shaped caulking 18 (yoke piece portion is good) in the divided core piece 17 arranged immediately below the annular core piece 12 arranged at the top, The V-shaped caulking 20 of the annular core piece 12 placed on the upper part is caulked and joined. The V-shaped caulking 20 has a V-shaped caulking projection when viewed from the lower side.

このＶ字かしめ２０の突出高さは、Ｖ字かしめ１８の高さより低く、かつ分割鉄心片１７の厚みより小さくなって、Ｖ字かしめ１８のかしめ力より小さなかしめ力で、環状鉄心片１２が分割積層鉄心１１にかしめ接合されるようになっている。このＶ字かしめ２０は、環状鉄心片１２のヨーク片部２１と磁極片部２２に設けられ、各分割積層鉄心１１の最上部の分割鉄心片１７には対応する貫通孔１９が設けられている。なお、このＶ字かしめ２０は、図１、図２に示すように、ヨーク片部２１にのみ設けることも可能であり、これによって、最終工程での環状鉄心片１２の分離が容易となる。 The protruding height of the V-shaped caulking 20 is lower than the height of the V-shaped caulking 18 and smaller than the thickness of the split iron core piece 17, and the caulking force is smaller than the caulking force of the V-shaped caulking 18. The split laminated iron core 11 is caulked and joined. The V-shaped caulking 20 is provided in the yoke piece portion 21 and the magnetic pole piece portion 22 of the annular core piece 12, and a corresponding through-hole 19 is provided in the uppermost divided core piece 17 of each divided laminated core 11. . As shown in FIGS. 1 and 2, the V-shaped caulking 20 can be provided only on the yoke piece portion 21, thereby facilitating separation of the annular core piece 12 in the final process.

隣り合う分割積層鉄心１１は円周方向端部に、積層方向凹凸部２３によって噛み合い（例えば、特開平１０−７５５５２号公報参照）、各分割積層鉄心１１がバラバラになっても凹部と凸部を係合させて組み立て可能となっている。凹凸部２３は分割鉄心片をそれぞれ複数枚ずつ噛み合わせて形成しているが、分割鉄心片を一枚ずつ交互に噛み合わせてもよい。また、環状鉄心片１２は完全に環状となっているが、磁極片部２２の先端（即ち、半径方向内側）では円周状に連結されている。そして、環状鉄心片１２は環状配置された（即ち、円周状に並べて配置された）各分割鉄心片１５、１７より内径が小さく形成され、積層鉄心１１の中心側に突出するリング状の突出部２４が形成されている。 Adjacent divided laminated cores 11 are engaged with circumferential end portions by lamination-direction uneven portions 23 (see, for example, JP-A-10-75552), and even if each divided laminated core 11 is separated, a concave portion and a convex portion are formed. It can be assembled and assembled. The concavo-convex portion 23 is formed by meshing a plurality of divided core pieces, but the divided core pieces may be alternately meshed one by one. The annular core pieces 12 are completely annular, but are connected circumferentially at the tip of the magnetic pole piece portion 22 (that is, radially inward). The annular core piece 12 is formed in a ring shape so as to have an inner diameter smaller than each of the divided core pieces 15 and 17 that are annularly arranged (that is, arranged side by side in a circumferential manner) and project toward the center side of the laminated core 11. A portion 24 is formed.

環状鉄心片１２の中心側に形成される内径円２５はこの積層鉄心１０に使用されるロータ（回転子鉄心）の外径と同一となっている。これによって、回転子鉄心片を形成する金型をそのままで環状鉄心片１２の中抜きに使用できる。従って、環状に配置された分割積層鉄心１１の内側円の内径より例えば、０．２〜２ｍｍ程度環状鉄心片１２の内径が小さいことになる。 An inner diameter circle 25 formed on the center side of the annular core piece 12 is the same as the outer diameter of the rotor (rotor core) used in the laminated core 10. As a result, the mold for forming the rotor core piece can be used as it is for hollowing out the annular core piece 12. Therefore, the inner diameter of the annular core piece 12 is, for example, about 0.2 to 2 mm smaller than the inner diameter of the inner circle of the divided laminated core 11 arranged in an annular shape.

また、環状鉄心片１２には、第２のかしめ部（Ｖ字かしめ２０）が形成されている部分以外の場所に円形の貫通孔２６が設けられている。この実施の形態では、各磁極片部２２に設けられているが、ヨーク片部２１に設けることも可能である。この貫通孔２６の直径は磁極片部２２の円周方向幅の例えば１／５〜１／２程度とするのが好ましく、分割積層鉄心１１には設けられていない。 The annular core piece 12 is provided with a circular through hole 26 at a place other than the portion where the second caulking portion (V-shaped caulking 20) is formed. In this embodiment, the magnetic pole piece portions 22 are provided, but can be provided on the yoke piece portions 21. The diameter of the through hole 26 is preferably about 1/5 to 1/2 of the circumferential width of the magnetic pole piece 22, and is not provided in the divided laminated core 11.

この積層鉄心１０の製造は、図５に示すようなプレス金型装置２８を用いて、厚みが例えば０．１５〜１ｍｍの被加工板（磁性鋼板）２９から打ち抜いて環状に配置された複数の分割鉄心片１５、１７を、かしめ部１４を介し必要枚数を積層して環状配置された分割積層鉄心１１を形成する。隣り合う分割鉄心片１５、１７のヨーク片部の形成にあっては、切り曲げとプッシュバック（例えば、特開２００５−３１８７６３号公報参照）を行うことによって分離する。この場合の環状配置された分割鉄心片１５、１７の中央に配置される円形鉄心片は回転子鉄心片として使用され、材料の板取り効率を高めている。なお、分割鉄心片１７のかしめ積層にあっては、分割鉄心片１５、１７が抜き込まれるダイを所定角度回転させて転積やスキューの形成が行われる。 The laminated core 10 is manufactured by using a press mold apparatus 28 as shown in FIG. 5 and punching from a work plate (magnetic steel plate) 29 having a thickness of 0.15 to 1 mm, for example, and arranged in an annular shape. The divided cores 15 and 17 are laminated in a necessary number via the caulking portion 14 to form the divided laminated core 11 that is annularly arranged. In the formation of the yoke pieces of the adjacent divided core pieces 15 and 17, they are separated by cutting and pushing back (for example, refer to Japanese Patent Application Laid-Open No. 2005-318863). In this case, the circular core piece disposed in the center of the annularly arranged split core pieces 15 and 17 is used as a rotor core piece, and the material cutting efficiency is increased. In the caulking lamination of the divided core pieces 17, the die into which the divided core pieces 15 and 17 are drawn is rotated by a predetermined angle to perform transposition and skew formation.

次に、積層された分割鉄心片１７（即ち、環状配置された分割積層鉄心１１）の上に、被加工板２９からヨーク片部２１及び磁極片部２２の先側が円周方向に連結するように打ち抜き形成された環状鉄心片１２をかしめ部（Ｖ字かしめ２０と貫通孔１９からなる）を介して積層する。これによって、環状配置された分割積層鉄心１１が環状鉄心片１２で接続補強された状態でプレス金型装置２８から排出される。この場合、積層鉄心１０は環状鉄心片１２で全体が固定されているので、環状配置された分割積層鉄心１１の形崩れや分解防止が図れる。 Next, the front side of the yoke piece portion 21 and the magnetic pole piece portion 22 is connected in the circumferential direction from the work plate 29 on the laminated divided core pieces 17 (that is, the annularly arranged divided laminated cores 11). The annular core pieces 12 formed by punching are laminated through a caulking portion (consisting of a V-shaped caulking 20 and a through hole 19). As a result, the annularly arranged divided laminated cores 11 are discharged from the press mold apparatus 28 in a state where the connection is reinforced by the annular core pieces 12. In this case, since the laminated core 10 is entirely fixed by the annular core piece 12, the shape of the annularly arranged laminated core 11 and prevention of decomposition can be prevented.

製造された複数の積層鉄心１０はパレット３１に搭載されて、焼鈍装置３２に移送され、所定温度に加熱されて残留応力及び必要に応じて結晶粒の調整が行われる。この場合、各積層鉄心１０は、環状鉄心片１２で連結されて一体となっているので、バラバラになることはなく、整列状態で搬送される。 A plurality of manufactured laminated cores 10 are mounted on a pallet 31 and transferred to an annealing device 32 where they are heated to a predetermined temperature to adjust residual stress and, if necessary, crystal grains. In this case, since each laminated iron core 10 is connected and integrated by the annular core pieces 12, the laminated iron cores 10 are transported in an aligned state without being separated.

そして、焼鈍された積層鉄心１０は、環状鉄心片の除去装置３３に搬送される。この除去装置３３は、環状配置された分割積層鉄心１１の内径円３４よりその直径が小さく、環状鉄心片１２の内径円２５より直径が大きく、しかも全長が積層鉄心１０の高さと同一か、又は積層鉄心１０の高さに１〜２枚の環状鉄心片１２の厚みを加える高さを有する円柱部３５と、この円柱部３５を支持するベース部３６と、環状鉄心片１２の貫通孔２６に層通するピン３７を底部に有した押さえ板３８とを有している。 Then, the annealed laminated core 10 is transported to the annular core piece removing device 33. The removal device 33 has a diameter smaller than the inner diameter circle 34 of the annularly arranged laminated core 11 and larger than the inner diameter circle 25 of the annular core piece 12, and the total length is equal to the height of the laminated core 10, or A cylindrical portion 35 having a height that adds the thickness of the one or two annular core pieces 12 to the height of the laminated core 10, a base portion 36 that supports the cylindrical portion 35, and the through-hole 26 of the annular core piece 12. It has a pressing plate 38 having a pin 37 passing through the bottom.

環状鉄心片の除去装置３３の使用にあっては、積層鉄心１０の中央の孔に、円柱部３５を挿入し、積層鉄心１０の上部から貫通孔２６にピン３７を挿入した状態で、押さえ板３８を押圧すると、突出部２４を起点にして環状鉄心片１２が環状配置された分割積層鉄心１１から外れる。これによって、各分割積層鉄心１１がバラバラとなるので、磁極部１３に巻線を施し、再度組み立てる。 In using the annular core piece removing device 33, the pressing plate is inserted in a state where the cylindrical portion 35 is inserted into the central hole of the laminated core 10 and the pin 37 is inserted into the through hole 26 from the upper part of the laminated core 10. When 38 is pressed, the annular core piece 12 is detached from the divided laminated core 11 in which the annular core piece 12 is annularly arranged with the protruding portion 24 as a starting point. As a result, the divided laminated iron cores 11 are separated, so that the magnetic pole portion 13 is wound and reassembled.

次に、図６に示す本発明の第２の実施の形態に係る積層鉄心３９について説明するが、第１の実施の形態に係る積層鉄心１０及びその製造方法との相違点について説明する。なお、積層鉄心１０と同一の構成要素には同一の番号を略類似した構成要素についてはその番号の末尾に「ａ」を付記してその詳しい説明を省略する。以下の第３の実施の形態に係る積層鉄心４０においても同様である。 Next, the laminated core 39 according to the second embodiment of the present invention shown in FIG. 6 will be described. Differences from the laminated core 10 according to the first embodiment and the manufacturing method thereof will be described. In addition, about the component similar to the laminated core 10, the same number is attached about the same component, "a" is attached to the end of the number, and the detailed description is abbreviate | omitted. The same applies to a laminated core 40 according to a third embodiment below.

この積層鉄心においては、積層鉄心３９の最上部に設けられている環状鉄心片１２ａの第２のかしめ部を構成するＶ字かしめ２０ａは、下位置に配置される分割積層鉄心１１のかしめ部１４の位置と平面視して同一位置に設けられている。そして、Ｖ字かしめ２０ａの突出高さは、かしめ部１４を形成するＶ字かしめ１８の突出部の高さより小さくなって、比較的小さなかしめ力で環状鉄心片１２ａが分割積層鉄心１１にかしめられている。 In this laminated iron core, the V-shaped caulking portion 20a constituting the second caulking portion of the annular core piece 12a provided at the uppermost portion of the laminated iron core 39 is caulked portion 14 of the divided laminated iron core 11 disposed at the lower position. It is provided at the same position in plan view. The protruding height of the V-shaped caulking 20a is smaller than the height of the protruding portion of the V-shaped caulking 18 that forms the caulking portion 14, and the annular core piece 12a is caulked to the divided laminated core 11 with a relatively small caulking force. ing.

なお、環状鉄心片１２ａとこの直下段にある分割鉄心片１７とのかしめ代（かしめ部での両金属が当接する面積×荷重）を小さくすることでかしめ力を小さくし、環状鉄心片１２ａの分離を容易にすることもできる。かしめ代はかしめを形成するパンチとダイのクリヤランスを調整することで自在に設定することができる。（第１、第３の実施の形態においても同じ）。 It should be noted that the caulking force is reduced by reducing the caulking allowance between the annular core piece 12a and the divided core piece 17 in the immediately lower stage (area where the two metals abut on the caulking portion × load), thereby reducing the caulking force of the annular core piece 12a. Separation can also be facilitated. The caulking allowance can be freely set by adjusting the punch and die clearance that form the caulking. (The same applies to the first and third embodiments).

続いて、図７、図８を参照しながら、第３の実施の形態に係る積層鉄心４０について説明する。積層鉄心４０では、環状鉄心片４１が環状配置された分割積層鉄心４２の底部にかしめ積層されている。即ち、環状鉄心片４１の内径円４３の直径は、この積層鉄心４０の製造過程で取り出される回転子鉄心４４の外径と同一となって、積層鉄心４０の磁極部内径円４５の直径より小さい。この環状鉄心片４１のヨーク片部４６及び磁極片部４６ａの先側が円周方向に連結していることは、環状鉄心片１２と同じである。 Subsequently, a laminated core 40 according to the third embodiment will be described with reference to FIGS. 7 and 8. In the laminated iron core 40, the annular iron core piece 41 is caulked and laminated on the bottom of the divided laminated iron core 42 arranged in an annular shape. That is, the diameter of the inner diameter circle 43 of the annular core piece 41 is the same as the outer diameter of the rotor core 44 taken out in the manufacturing process of the laminated core 40 and is smaller than the diameter of the magnetic pole part inner diameter circle 45 of the laminated core 40. . It is the same as the annular core piece 12 that the tip side of the yoke piece portion 46 and the magnetic pole piece portion 46a of the annular core piece 41 are connected in the circumferential direction.

環状配置される分割積層鉄心４２の最下部の分割鉄心片４７には矩形のかしめ用貫通孔４８が設けられ、その上部に配置される分割鉄心片４９にはＶ字かしめ５０が形成され、これらが第１のかしめ部を形成し、かしめ積層された分割積層鉄心４２を構成している。
環状鉄心片４１には上向きのＶ字かしめ５２（第２のかしめ部を構成する）が形成され、その直上部にある分割鉄心片４７にはこのＶ字かしめ５２に係合する矩形の貫通孔５３が形成されている。なお、貫通孔５３の位置は、ヨーク片部に設けるのが好ましい。このＶ字かしめ５２の突出高さは、分割鉄心片４７の厚みと同一か又は小さくなって、比較的容易に分離可能となっている。環状鉄心片４１には、この環状鉄心片４１を分割積層鉄心４２から分離する場合に使用する貫通孔２６が設けられている。 A rectangular caulking through-hole 48 is provided in the lowermost segment core piece 47 of the segmented laminated core 42 arranged in an annular shape, and a V-shaped caulking 50 is formed in the segment core piece 49 disposed in the upper part thereof. Forms a first caulked portion and constitutes a laminated laminated core 42 that is caulked and laminated.
An upward V-shaped caulking 52 (constituting a second caulking portion) is formed in the annular core piece 41, and a rectangular through-hole that engages with the V-shaped caulking 52 is formed in the divided core piece 47 located immediately above the annular core piece 41. 53 is formed. The position of the through hole 53 is preferably provided in the yoke piece. The protruding height of the V-shaped caulking 52 is the same as or smaller than the thickness of the divided core piece 47, and can be separated relatively easily. The annular core piece 41 is provided with a through hole 26 used when the annular core piece 41 is separated from the divided laminated core 42.

この積層鉄心４０の製造は、プレス金型装置を用いて、被加工板２９からヨーク片部４６及び磁極片部４６ａの先側が円周方向に連結するように環状鉄心片４１を打ち抜き形成する。次に、環状鉄心片４１の上に、被加工板２９から打ち抜いて環状に配置された複数の分割鉄心片４７、４９を、かしめ部を介して必要枚数を積層して分割積層鉄心４２を形成する。この積層鉄心４０を焼鈍する。そして、環状鉄心片４１の除去については第１の実施の形態に係る積層鉄心１０と同一であるが、上下逆にして、環状鉄心片４１を分割積層鉄心４２の上部に配置して行うのが好ましい。 In the production of the laminated core 40, the annular core piece 41 is punched and formed from the workpiece plate 29 so that the tip side of the yoke piece portion 46 and the magnetic pole piece portion 46 a are connected in the circumferential direction by using a press die device. Next, on the annular core piece 41, a plurality of divided core pieces 47 and 49, which are punched from the work plate 29 and arranged in an annular shape, are laminated in a necessary number via a caulking portion to form a divided laminated core 42. To do. The laminated core 40 is annealed. The removal of the annular core piece 41 is the same as that of the laminated core 10 according to the first embodiment. However, the annular core piece 41 is arranged on the upper part of the divided laminated core 42 upside down. preferable.

前記実施の形態においては、具体的数字を用いて説明したが、本発明の要旨を変更しない範囲で数値変更、寸法変更、形状変更を行うことは可能である。
この実施の形態では、環状鉄心片を環状配置された分割積層鉄心の中心側の内径円から突出させたが、環状鉄心片の他の部分を分割積層鉄心の形状から突出させた場合も本発明は適用される。また、この実施の形態では、環状鉄心片１２のかしめ部は磁極部の数をｎとすると２ｎであったが、ｎでもよいし３ｎ以上であってもよい。また、各分割鉄心片１７のかしめ部１４の数は２であったが３又は４以上としてもよい。更に、環状鉄心片１２及び各分割鉄心片１５、１７のかしめ部にはＶ字かしめを用いたが、円形半抜きかしめであってもよい。 Although the embodiment has been described using specific numerals, it is possible to make numerical changes, dimensional changes, and shape changes without departing from the scope of the present invention.
In this embodiment, the annular core piece is protruded from the inner diameter circle on the center side of the divided laminated core arranged in an annular shape, but the present invention also applies when other portions of the annular core piece are protruded from the shape of the divided laminated core. Applies. Further, in this embodiment, the caulking portion of the annular core piece 12 is 2n when the number of magnetic pole portions is n, but may be n or 3n or more. Moreover, although the number of the caulking portions 14 of each divided iron core piece 17 is 2, it may be 3 or 4 or more. Further, although the V-shaped caulking is used for the caulking portions of the annular core piece 12 and each of the divided core pieces 15 and 17, a circular half blank caulking may be used.

本発明の第１の実施の形態に係る積層鉄心の斜視図である。1 is a perspective view of a laminated iron core according to a first embodiment of the present invention. 本発明の第１の実施の形態に係る積層鉄心の分解斜視図である。It is a disassembled perspective view of the laminated iron core which concerns on the 1st Embodiment of this invention. 同正断面図である。FIG. 同拡大部分断面図である。It is the same expanded partial sectional view. 同積層鉄心の製造方法の説明図である。It is explanatory drawing of the manufacturing method of the laminated core. 本発明の第２の実施の形態に係る積層鉄心の拡大部分断面図である。It is an expanded partial sectional view of the laminated iron core which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施の形態に係る積層鉄心の正断面図である。It is a front sectional view of the laminated iron core according to the third embodiment of the present invention. 同部分断面図である。It is the same fragmentary sectional view.

符号の説明Explanation of symbols

１０：積層鉄心、１１：分割積層鉄心、１２、１２ａ：環状鉄心片、１３：磁極部、１４：第１のかしめ部、１５：分割鉄心片、１６：貫通孔、１７：分割鉄心片、１８：Ｖ字かしめ、１９：貫通孔、２０、２０ａ：Ｖ字かしめ、２１：ヨーク片部、２２：磁極片部、２３：積層方向凹凸部、２４：突出部、２５：内径円、２６：貫通孔、２８：プレス金型装置、２９：被加工板、３１：パレット、３２：焼鈍装置、３３：環状鉄心片の除去装置、３４：内径円、３５：円柱部、３６：ベース部、３７：ピン、３８：押さえ板、３９：積層鉄心、４０：積層鉄心、４１：環状鉄心片、４２：分割積層鉄心、４３：内径円、４４：回転子鉄心、４５：磁極部内径円、４６：ヨーク片部、４６ａ：磁極片部、４７：分割鉄心片、４８：かしめ用貫通孔、４９：分割鉄心片、５０：Ｖ字かしめ、５２：Ｖ字かしめ、５３：貫通孔 10: laminated iron core, 11: divided iron core, 12, 12a: annular core piece, 13: magnetic pole part, 14: first caulking part, 15: divided iron core piece, 16: through hole, 17: divided iron core piece, 18 : V-shaped caulking, 19: Through hole, 20, 20a: V-shaped caulking, 21: Yoke piece, 22: Magnetic pole piece, 23: Concavity and convexity in the stacking direction, 24: Projection, 25: Inner diameter circle, 26: Through Hole: 28: Press die device, 29: Work plate, 31: Pallet, 32: Annealing device, 33: Removal device of annular core piece, 34: Inner diameter circle, 35: Cylindrical portion, 36: Base portion, 37: Pin: 38: Presser plate, 39: Laminated iron core, 40: Laminated iron core, 41: Ring iron core piece, 42: Divided laminated iron core, 43: Inner diameter circle, 44: Rotor iron core, 45: Inner diameter circle of magnetic pole part, 46: Yoke One piece, 46a: magnetic pole piece, 47: divided core piece, 48: caulking penetration Hole, 49: segment core piece, 50: V-shaped caulking, 52: V-shaped caulking, 53: through-hole

Claims (18)

複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の上端側及び下端側のいずれか一方に環状鉄心片を第２のかしめ部を介してかしめ積層し、環状配置した前記分割積層鉄心の形崩れ及び分割防止を図った積層鉄心であって、
前記環状鉄心片は、磁極片部の先側及びヨーク片部が円周方向に連結していることを特徴とする積層鉄心。 A plurality of divided iron core pieces are caulked and laminated via a first caulking portion, and an annular iron core piece is caulked and laminated via a second caulking portion on one of the upper end side and the lower end side of the divided laminated iron core. In addition, a laminated iron core designed to prevent the shape and shape of the divided laminated iron core arranged annularly,
The laminated core is characterized in that the annular core piece has a tip side of a magnetic pole piece and a yoke piece connected in a circumferential direction. 請求項１記載の積層鉄心において、前記環状鉄心片は環状配置された前記分割鉄心片より内径が小さく形成され、環状配置された前記分割積層鉄心の中心側に突出する突出部が設けられていることを特徴とする積層鉄心。 2. The laminated core according to claim 1, wherein the annular core piece is formed to have an inner diameter smaller than the annularly arranged split core pieces, and a projecting portion is provided to project toward the center of the annularly arranged laminated core. A laminated iron core characterized by that. 請求項１及び２のいずれか１記載の積層鉄心において、前記環状鉄心片の内径は、環状配置された前記分割鉄心片の内側部分の鉄心片から形成される回転子鉄心の外径と同一であることを特徴とする積層鉄心。 3. The laminated core according to claim 1, wherein an inner diameter of the annular core piece is the same as an outer diameter of a rotor core formed of an inner core piece of the annularly arranged split core pieces. A laminated iron core characterized by being. 請求項１〜３のいずれか１記載の積層鉄心において、前記環状鉄心片に形成された前記第２のかしめ部のかしめ突起は、前記分割鉄心片に形成された前記第１のかしめ部のかしめ突起より、その突出量が小であることを特徴とする積層鉄心。 The laminated iron core according to any one of claims 1 to 3, wherein the caulking protrusion of the second caulking portion formed on the annular iron core piece is caulking of the first caulking portion formed on the divided iron core piece. A laminated iron core characterized in that the amount of protrusion is smaller than the protrusion. 請求項１〜４のいずれか１記載の積層鉄心において、前記環状鉄心片を前記分割鉄心片に積層連結する前記第２のかしめ部のかしめ代は、前記分割鉄心片同士を積層連結する前記第１のかしめ部のかしめ代より小さくしたことを特徴とする積層鉄心。 The laminated core according to any one of claims 1 to 4, wherein a caulking allowance of the second caulking portion that laminates and connects the annular core pieces to the divided core pieces is the first that connects the divided core pieces in a stacked manner. A laminated iron core characterized by being smaller than a caulking allowance of 1 caulking portion. 請求項１〜５のいずれか１記載の積層鉄心において、前記第１のかしめ部と前記第２のかしめ部は平面視して同一位置にあることを特徴とする積層鉄心。 The laminated core according to any one of claims 1 to 5, wherein the first caulking portion and the second caulking portion are in the same position in plan view. 請求項１〜５のいずれか１記載の積層鉄心において、前記第１のかしめ部と前記第２のかしめ部は平面視して異なる位置にあることを特徴とする積層鉄心。 The laminated core according to any one of claims 1 to 5, wherein the first caulking portion and the second caulking portion are in different positions in plan view. 請求項１〜４のいずれか１記載の積層鉄心において、前記環状鉄心片は前記ヨーク片部に形成されたかしめ突起のみで前記分割鉄心片とかしめ結合していることを特徴とする積層鉄心。 5. The laminated core according to claim 1, wherein the annular core piece is caulked and joined to the divided core piece only by caulking protrusions formed on the yoke piece portion. 6. 請求項１〜８のいずれか１記載の積層鉄心において、前記環状鉄心片には複数の貫通孔が設けられていることを特徴とする積層鉄心。 The laminated core according to any one of claims 1 to 8, wherein the annular core piece is provided with a plurality of through holes. 複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の上端側に環状鉄心片を第２のかしめ部を介してかしめ積層した積層鉄心をプレス金型装置で製造する方法であって、
被加工板から打ち抜いて環状に配置された複数の前記分割鉄心片を、前記第１のかしめ部を介し必要枚数を積層して前記分割積層鉄心を形成する第１工程と、
環状配置された前記分割積層鉄心の上に、前記被加工板からヨーク片部及び磁極片部の先側が円周方向に連結するように打ち抜き形成された前記環状鉄心片を前記第２のかしめ部を介して積層する第２工程とを有し、
前記プレス金型装置から、環状配置された前記分割積層鉄心が前記環状鉄心片で接続補強された状態で排出されることを特徴とする積層鉄心の製造方法。 A press mold apparatus having a laminated core in which a plurality of divided core pieces are caulked and laminated via a first caulking portion and an annular core piece is caulked and laminated via a second caulking portion on the upper end side of the divided laminated core. A method of manufacturing with
A first step of forming the divided laminated core by laminating a required number of the plurality of divided core pieces, which are punched out from the work plate and arranged in an annular shape, via the first caulking portion;
The second caulking portion is formed by punching the annular core piece, which is formed so as to be connected to the front side of the yoke piece portion and the magnetic pole piece portion from the work plate in the circumferential direction on the annularly arranged laminated core. And a second step of laminating via
A method of manufacturing a laminated core, wherein the divided laminated cores arranged annularly are discharged from the press mold apparatus in a state of being connected and reinforced with the annular core pieces. 複数の分割鉄心片を第１のかしめ部を介してかしめ積層して環状配置した分割積層鉄心の下端側に環状鉄心片を第２のかしめ部を介してかしめ積層した積層鉄心をプレス金型装置で製造する方法であって、
被加工板からヨーク片部及び磁極片部の先側が円周方向に連結するように前記環状鉄心片を打ち抜き形成する第１工程と、
前記環状鉄心片の上に、前記被加工板から打ち抜いて環状に配置された複数の前記分割鉄心片を、前記第２、第１のかしめ部を介して必要枚数を積層して前記分割積層鉄心を形成する第２工程とを有し、
前記プレス金型装置から、環状配置された前記分割積層鉄心が前記環状鉄心片で接続補強された状態で排出されることを特徴とする積層鉄心の製造方法。 Press die apparatus having a laminated core obtained by caulking and laminating a plurality of divided iron core pieces via a first caulking portion and caulking and laminating the lower laminated iron core via a second caulking portion. A method of manufacturing with
A first step of punching and forming the annular core piece so that the tip side of the yoke piece part and the magnetic pole piece part are connected in the circumferential direction from the work plate;
On the annular core piece, a plurality of the divided core pieces, which are punched from the work plate and arranged in an annular shape, are stacked in a necessary number via the second and first caulking portions, and the divided laminated core is provided. A second step of forming
A method of manufacturing a laminated core, wherein the divided laminated cores arranged annularly are discharged from the press mold apparatus in a state of being connected and reinforced with the annular core pieces. 請求項１０及び１１のいずれか１記載の積層鉄心の製造方法において、前記環状鉄心片は環状配置された前記分割鉄心片より内径が小さくなるように打ち抜きを行い、該積層鉄心の中心側に突出する突出部を形成することを特徴とする積層鉄心の製造方法。 12. The method of manufacturing a laminated core according to claim 10, wherein the annular core piece is stamped so that an inner diameter is smaller than the annularly arranged divided core pieces and protrudes toward a center side of the laminated core. The manufacturing method of the laminated iron core characterized by forming the protrusion part to perform. 請求項１２記載の積層鉄心の製造方法において、前記環状鉄心片に形成した前記突出部を起点に環状配置された前記分割積層鉄心から前記環状鉄心片を剥ぎ取ることを特徴とする積層鉄心の製造方法。 13. The method of manufacturing a laminated core according to claim 12, wherein the annular core piece is peeled off from the divided laminated core that is annularly arranged starting from the protrusion formed on the annular core piece. Method. 請求項１０〜１３のいずれか１記載の積層鉄心の製造方法において、前記環状鉄心片の内径は、環状配置された前記分割鉄心片の内側部分の鉄心片から形成される回転子鉄心の外径と同一であることを特徴とする積層鉄心の製造方法。 The method of manufacturing a laminated core according to any one of claims 10 to 13, wherein an inner diameter of the annular core piece is an outer diameter of a rotor core formed from an inner core piece of the annularly arranged split core pieces. A method for producing a laminated iron core, characterized in that 請求項１０〜１４のいずれか１記載の積層鉄心の製造方法において、前記環状鉄心片に形成された前記第２のかしめ部のかしめ突起は、前記分割鉄心片に形成された前記第１のかしめ部のかしめ突起より、その突出量が小であることを特徴とする積層鉄心の製造方法。 15. The method of manufacturing a laminated core according to any one of claims 10 to 14, wherein the caulking protrusion of the second caulking portion formed on the annular core piece is the first caulking formed on the divided core piece. A method of manufacturing a laminated iron core characterized in that the amount of protrusion is smaller than the caulking protrusion of the portion. 請求項１５記載の積層鉄心の製造方法において、前記環状鉄心片は前記ヨーク片部に形成されたかしめ突起のみで前記分割鉄心片とかしめ結合していることを特徴とする積層鉄心の製造方法。 16. The method of manufacturing a laminated core according to claim 15, wherein the annular core piece is caulked and joined to the divided core piece only by caulking protrusions formed on the yoke piece portion. 請求項１０〜１６のいずれか１記載の積層鉄心の製造方法において、前記環状鉄心片には複数の貫通孔が設けられていることを特徴とする積層鉄心の製造方法。 The method for manufacturing a laminated core according to any one of claims 10 to 16, wherein the annular core piece is provided with a plurality of through holes. 請求項１０及び１１のいずれか１記載の積層鉄心の製造方法において、前記プレス金型装置から排出された該積層鉄心が、前記環状鉄心片で補強された状態で焼鈍されることを特徴とする積層鉄心の製造方法。 12. The method of manufacturing a laminated core according to claim 10, wherein the laminated core discharged from the press mold apparatus is annealed while being reinforced by the annular core piece. Manufacturing method of laminated iron core.
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