JP3710706B2 - Manufacturing method of laminated core and mold apparatus used for manufacturing the same - Google Patents

Manufacturing method of laminated core and mold apparatus used for manufacturing the same Download PDF

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JP3710706B2
JP3710706B2 JP2000366433A JP2000366433A JP3710706B2 JP 3710706 B2 JP3710706 B2 JP 3710706B2 JP 2000366433 A JP2000366433 A JP 2000366433A JP 2000366433 A JP2000366433 A JP 2000366433A JP 3710706 B2 JP3710706 B2 JP 3710706B2
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core
manufacturing
laminated
bending
cutting
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JP2002171725A (en
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裕之 秋田
裕治 中原
展明 三宅
督夫 告井
智明 及川
庸賀 田島
浩二 増本
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、例えば電動機等の主要部を構成する積層コアに係り、特に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、このコア部材を積層するようにした積層コアの製造方法、およびその製造に用いる金型装置に関するものである。
【０００２】
【従来の技術】
例えば特開２０００−２０１４５８号公報に開示されたこの種従来の電動機の積層コア１０は、図４ないし図６に示すように、一端側裏表面に連結部としての凹部１ａおよび凸部１ｂが形成されるとともに、その端面１ｃはこれら凹部１ａおよび凸部１ｂの中心を中心とした円弧状に形成され、他端側には相隣なる相手側の端面１ｃと嵌合可能な端面１ｄが形成された複数の板状のコア片１を、各端面１ｃ、１ｄを介して帯状に配列した第１のコア部材２と、各コア片１が第１のコア部材２とは長手方向に互い違いに配列された第２のコア部材３とを交互に積層し、積層方向に相隣なるコア片１同士の凹部１ａおよび凸部１ｂを嵌合させることにより屈曲可能に連結して構成されており、各コア片１にそれぞれ巻線４が巻回された後、積層された両コア部材２、３の各コア片１の凹、凸部１ａ、１ｂを、屈曲させることにより積層コア１０を環状に形成して図７に示すような固定子５が構成される。
【０００３】
そして、上記のように構成される積層コア１０の各コア片１は、順送り金型装置内において打ち抜きおよび切り曲げ加工を施すことにより順次形成されるが、各コア片１の両端面１ｃ、１ｄの形成は図８（Ａ）に示すように、金型装置のダイス６上に載置された板状部材７を押圧部材８で押さえつけるとともに、図８（Ｂ）に矢印で示すようにパンチ９を下降させ、図８（Ｃ）に示すようにダイス６のキャビティ６ａ内にパンチ９を嵌入、すなわち切り曲げ加工によって成され、同金型装置内で外形が打ち抜き加工されて各コア片１が形成される。この際、板状部材７は図８（Ｃ）に示すように下方に曲げられるが、パンチ９が上昇するに伴って押し戻し部材１１により押し上げられて元に戻り平坦となる。
【０００４】
【発明が解決しようとする課題】
従来の積層コア１０は以上のように構成され、各コア片１の両端面１ｃ、１ｄを形成するために、図８に示すように切り曲げ加工が施されているので、パンチ９が上昇するに伴って押し戻し部材１１により押し上げられて元に戻り平坦になるとはいうものの、板状部材７の切り曲げ加工の曲げ支点に相当する部位、すなわち板状部材７の下面が、ダイス６の上面とキャビティ６ａの開口とが交差する角部に接触する部位に変形が発生するため、両コア部材２、３の積層状態における形状精度が悪化し、効率が低下するという問題点があった。
【０００５】
この発明は上記のような問題点を解消するためになされたもので、積層状態における形状精度の悪化を防止し、効率の向上を図ることが可能な積層コアの製造方法、およびその製造に用いる金型装置を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
この発明の請求項１に係る積層コアの製造方法は、板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造方法において、切り曲げ加工を施す際に切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたものである。
【０００７】
又、この発明の請求項２に係る積層コアの製造方法は、板状部材に打ち抜きおよび切り曲げ加工を施して所定の形状に形成した複数のコア片を帯状に配列することによりコア部材を形成し、コア部材をコア片の積層方向に相隣なる縁部同士が重なり合うように積層するとともに、重なり合ったコア片の縁部同士を屈曲可能に連結する連結部を形成するようにした積層コアの製造方法において、切り曲げ加工を施す際に切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたものである。
【０００８】
又、この発明の請求項３に係る積層コアの製造方法は、請求項１または２において、切り曲げ加工を施す側とは異なる側に連結部を形成するようにしたものである。
【０００９】
又、この発明の請求項４に係る積層コアの製造方法は、板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造方法において、切り曲げ加工を施す側とは異なる側に連結部を形成するようにしたものである。
【００１０】
又、この発明の請求項５に係る積層コアの製造に用いる金型装置は、一方の金型に載置された板状部材を押圧部材で押圧し一方の金型の開口に他方の金型の突出部を嵌入させることにより打ち抜きおよび切り曲げ加工を施し、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造に用いる金型装置において、板状部材と押圧部材の間の板状部材の切り曲げ加工の曲げ支点近傍と対応する領域に隙間を形成したものである。
【００１１】
【発明の実施の形態】
以下、この発明の実施の形態を図に基づいて説明する。
実施の形態１．
図１はこの発明の実施の形態１における積層コアの製造に用いる金型装置により切り曲げ加工を施す各工程を示す断面図、図２は図１における金型装置によって形成された積層コアの要部を示す平面図である。
【００１２】
図において、１２は上面に板状部材１３が載置されたダイスで、切り曲げ加工が施される部位にダイス穴１２ａが形成されている。１４はダイス１２のダイス穴１２ａ内に装着され、弾性部材１５により所定の力で上方に付勢された押し戻し部材、１６はダイス１２上の板状部材１３を押さえつける押圧部材で、板状部材１３の切り曲げ加工の曲げ支点近傍と対応する領域に、隙間を形成する逃し部１６ａが形成されている。１７は押圧部材１６内を摺動可能に貫通し、ダイス１２のダイス穴１２ａ内に嵌入することにより、板状部材１３に切り曲げ加工を行うパンチである。
【００１３】
次に、上記のように構成される金型装置による切り曲げ加工の工程を説明する。
まず、図１（Ａ）に示すように、ダイス１２の上面に板状部材１３を載置するとともに、この板状部材１３を押圧部材１６で押さえつける。次いで、図１（Ｂ）に矢印で示すようにパンチ１７を下降させ、図１（Ｃ）に示すようにパンチ１７をダイス１２のダイス穴１２ａ内に嵌入させることにより、板状部材１３に切り曲げ加工が施され、その後、板状部材１３は図示はしないがパンチ１７が上昇するに伴い、押し戻し部材１４により押し上げられて元の状態に戻り平坦となる。
【００１４】
そして、同金型装置内において外形が打ち抜き加工され、図２に示すように、一端側裏表面に連結部としての凹部１８ａおよび凸部１８ｂが形成されるとともに、その端面１８ｃはこれら凹部１８ａおよび凸部１８ｂの中心を中心とした円弧状に形成され、他端側には相隣なる相手側の端面１８ｃと嵌合可能な端面１８ｄが形成された複数のコア片１８が順次加工され、これら各コア片１８を各端面１８ｃ、１８ｄを介して帯状に配列した第１のコア部材１９と、各コア片１８が第１のコア部材１９とは長手方向に互い違いに配列した第２のコア部材２０とを交互に積層し、積層方向に相隣なるコア片１８同士の凹部１８ａおよび凸部１８ｂを嵌合させることにより屈曲可能に成して積層コア２１が構成される。
【００１５】
このように上記実施の形態１によれば、ダイス１２上に載置される板状部材１３を押さえつける押圧部材１６の下面の、板状部材１３の切り曲げ加工の曲げ支点と対応する領域に切り欠き１６ａを設けて、板状部材１３と押圧部材１６の間に隙間を形成し、パンチ１７により切り曲げ加工を施すようにしているので、切り曲げ加工と同時に板状部材１３は図１（Ｃ）に示すように上方に浮き上がり、板状部材１３の下面がダイス１２の上面とダイス穴１２ａの開口とが交差する角部に接触することがなく、この部位に変形が発生することもなくなるため、両コア部材１９、２０の積層状態における形状精度の悪化が防止され、効率の向上を図ることができる。
【００１６】
実施の形態２．
図３はこの発明の実施の形態２における積層コアの製造に用いる金型装置により切り曲げ加工を施す工程の一部を示す断面図である。
図において、上記実施の形態１におけると同様な部分は同一符号を付して説明を省略する。２２は切り曲げ加工が施される部位にダイス穴２２ａが形成されたダイスで、コア片１８の凸部１８ｂが形成される位置と対応する部位に逃げ孔２２ｂが形成されている。２３はダイス２２の上方に配置される押圧部材で、切り曲げ加工の曲げ支点近傍と対応する領域に、隙間を形成する逃し部２３ａが設けられている。
【００１７】
このように実施の形態２によれば、上記実施の形態１では詳しく説明しなかったけれども、図３に示すように連結部としての凹部１８ａおよび凸部１８ｂが、切り曲げ加工を施す側とは異なる側となるように板状部材１８を配置するようにしているので、連結部に切り曲げ加工を施すことによる影響を与えることを防止することが可能となり、逃し部２３ａを設けたことによる効果と相俟って、さらに効率の向上を図ることができる。
【００１８】
なお、上記各実施の形態１、２では、コア片の積層方向に相隣なる縁部同士が重なり合うように積層し、重なり合ったコア片の縁部同士を凹部および凸部により屈曲可能に連結する構成のものについて説明したが、これに限定されるものではなく、凹部および凸部に代えて縁部同士に貫通穴を形成し、この貫通穴にピン部材を嵌入させた構成としても、さらに図９に示すようにコア片２４の縁部同士を薄肉部２４ａにより連結する構成としても良く、それぞれ上記と同様の効果を発揮し得ることは言うまでもない。
【００１９】
【発明の効果】
以上のように、この発明の請求項１によれば、板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造方法において、切り曲げ加工を施す際に切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたので、積層状態における形状精度の悪化を防止し、効率の向上を図ることが可能な積層コアの製造方法を提供することができる。
【００２０】
又、この発明の請求項２によれば、板状部材に打ち抜きおよび切り曲げ加工を施して所定の形状に形成した複数のコア片を帯状に配列することによりコア部材を形成し、コア部材をコア片の積層方向に相隣なる縁部同士が重なり合うように積層するとともに、重なり合ったコア片の縁部同士を屈曲可能に連結する連結部を形成するようにした積層コアの製造方法において、切り曲げ加工を施す際に切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたので、積層状態における形状精度の悪化を防止し、効率の向上を図ることが可能な積層コアの製造方法を提供することができる。
【００２１】
又、この発明の請求項３によれば、請求項１または２において、切り曲げ加工を施す側とは異なる側に連結部を形成するようにしたので、積層状態における形状精度の悪化を防止し、さらに効率の向上を図ることが可能な積層コアの製造方法を提供することができる。
【００２２】
又、この発明の請求項４によれば、板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造方法において、切り曲げ加工を施す側とは異なる側に連結部を形成するようにしたので、積層状態における形状精度の悪化を防止し、さらに効率の向上を図ることが可能な積層コアの製造方法を提供することができる。
【００２３】
又、この発明の請求項５によれば、一方の金型に載置された板状部材を押圧部材で押圧し一方の金型の開口に他方の金型の突出部を嵌入させることにより打ち抜きおよび切り曲げ加工を施し、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、コア部材を積層するようにした積層コアの製造に用いる金型装置において、板状部材と押圧部材の間の板状部材の切り曲げ加工の曲げ支点近傍と対応する領域に隙間を形成したので、積層状態における形状精度の悪化を防止し、効率の向上を図ることが可能な積層コアの製造に用いる金型装置を提供することができる。
【図面の簡単な説明】
【図１】 この発明の実施の形態１における積層コアの製造に用いる金型装置により切り曲げ加工を施す各工程を示す断面図である。
【図２】 図１における金型装置によって形成された積層コアの要部を示す平面図である。
【図３】 この発明の実施の形態２における積層コアの製造に用いる金型装置により切り曲げ加工を施す工程の一部を示す断面図である。
【図４】 積層コアの一般的な構成を示す平面図である。
【図５】 図４における積層コアの積層状態を示す断面図である。
【図６】 図４における積層コアの連結部としての凹、凸部の構成を示す断面図である。
【図７】 図４における積層コアを用いて形成された固定子の構成を示す正面図である。
【図８】 従来の積層コアの製造に用いる金型装置により切り曲げ加工を施す各工程を示す断面図である。
【図９】 積層コアの図４とは異なる一般的な構成を示す平面図である。
【符号の説明】
１２，２２ ダイス、１２ａ，２２ａ ダイス穴、１６，２３ 押圧部材、
１６ａ，２３ａ 逃し穴、２３ｂ 突起、１７ パンチ、１８ コア片、
１８ａ 凹部、１８ｂ 凸部、１８ｃ，１８ｄ 端面、１９ 第１のコア部材、
２０ 第２のコア部材、２１ 積層コア。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminated core that constitutes a main part of, for example, an electric motor or the like, and in particular, punched and cut and bent to form a core member in which a plurality of core pieces are connected in a band shape via a bendable connecting part. The present invention relates to a method for producing a laminated core in which the core members are laminated, and a mold apparatus used for the production.
[0002]
[Prior art]
For example, a laminated core 10 of this type of conventional electric motor disclosed in Japanese Patent Application Laid-Open No. 2000-201458 is formed with a concave portion 1a and a convex portion 1b as connecting portions on the back surface on one end side as shown in FIGS. In addition, the end surface 1c is formed in an arc shape centered on the centers of the concave portion 1a and the convex portion 1b, and an end surface 1d that can be fitted to the adjacent end surface 1c is formed on the other end side. A plurality of plate-like core pieces 1 are arranged in a strip shape via end faces 1c and 1d, and each core piece 1 is alternately arranged in the longitudinal direction from the first core member 2. The second core members 3 are alternately laminated, and are configured so as to be bendable by fitting the concave portions 1a and convex portions 1b of the adjacent core pieces 1 in the laminating direction. After the windings 4 are wound around the core pieces 1 respectively, And concave core pieces 1 of the two core members 2 and 3, the convex portion 1a, a 1b, and the laminated core 10 is formed in an annular shape by bending the stator 5 as shown in FIG. 7 configured.
[0003]
The core pieces 1 of the laminated core 10 configured as described above are sequentially formed by punching and bending in a progressive die apparatus. Both end faces 1c and 1d of each core piece 1 are formed. 8A, the plate-like member 7 placed on the die 6 of the mold apparatus is pressed by the pressing member 8, and the punch 9 is shown by the arrow in FIG. 8B. 8C, the punch 9 is inserted into the cavity 6a of the die 6 as shown in FIG. 8C, that is, it is formed by cutting and bending, and the outer shape is punched out in the mold apparatus, so that each core piece 1 is formed. It is formed. At this time, the plate-like member 7 is bent downward as shown in FIG. 8 (C), but as the punch 9 is raised, it is pushed up by the push-back member 11 to return to its original state and become flat.
[0004]
[Problems to be solved by the invention]
The conventional laminated core 10 is configured as described above, and is cut and bent as shown in FIG. 8 to form both end faces 1c and 1d of each core piece 1, so that the punch 9 rises. Accordingly, the plate member 7 is pushed up by the push-back member 11 to return to the original flat state, but the portion corresponding to the bending fulcrum of the plate member 7 for cutting and bending, that is, the lower surface of the plate member 7 is the upper surface of the die 6. Since deformation occurs in a portion that contacts a corner portion where the opening of the cavity 6a intersects, there is a problem that the shape accuracy in the stacked state of both the core members 2 and 3 is deteriorated and efficiency is lowered.
[0005]
The present invention has been made to solve the above-mentioned problems, and is used for manufacturing a laminated core capable of preventing deterioration of shape accuracy in a laminated state and improving efficiency, and the production thereof. The object is to provide a mold apparatus.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a method for manufacturing a laminated core, comprising: punching and cutting a plate-like member to form a core member in which a plurality of core pieces are connected in a band shape via a bendable connecting portion. In the manufacturing method of the laminated core in which the core members are laminated, the upper part in the vicinity of the bending fulcrum of the cutting and bending process is set in an unconstrained state when the cutting and bending process is performed.
[0007]
According to a second aspect of the present invention, there is provided a method for manufacturing a laminated core comprising: forming a core member by arranging a plurality of core pieces formed in a predetermined shape by punching and cutting a plate-like member in a predetermined shape. And the core member is laminated so that adjacent edges overlap each other in the stacking direction of the core pieces, and a connecting part that flexibly connects the edges of the overlapping core pieces is formed. In the manufacturing method, when the bending process is performed, the upper part in the vicinity of the bending fulcrum of the cutting process is set in an unconstrained state.
[0008]
According to a third aspect of the present invention, there is provided a method for manufacturing a laminated core according to the first or second aspect, wherein the connecting portion is formed on a side different from the side to be cut and bent.
[0009]
According to a fourth aspect of the present invention, there is provided a laminated core manufacturing method comprising: punching and cutting a plate-like member; and a core member in which a plurality of core pieces are connected in a band shape via a bendable connecting portion. In the manufacturing method of the laminated core formed and laminated with the core member, the connecting portion is formed on the side different from the side to be cut and bent.
[0010]
According to a fifth aspect of the present invention, there is provided a mold apparatus for use in manufacturing a laminated core, wherein a plate-like member placed on one mold is pressed with a pressing member, and the other mold is inserted into one mold opening. Of a laminated core in which a plurality of core pieces are connected in a band shape via a connecting portion that can be bent, and the core members are stacked. In the mold apparatus used for manufacturing, a gap is formed in a region corresponding to the vicinity of the bending fulcrum of the plate member between the plate member and the pressing member.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing each step of cutting and bending by a mold apparatus used for manufacturing a laminated core according to Embodiment 1 of the present invention, and FIG. 2 is a schematic diagram of the laminated core formed by the mold apparatus in FIG. It is a top view which shows a part.
[0012]
In the figure, reference numeral 12 denotes a die having a plate-like member 13 placed on the upper surface, and a die hole 12a is formed at a portion to be cut and bent. Reference numeral 14 denotes a push-back member that is mounted in the die hole 12 a of the die 12 and is urged upward by a predetermined force by the elastic member 15, and 16 is a pressing member that presses the plate-like member 13 on the die 12. In a region corresponding to the vicinity of the bending fulcrum of the cutting and bending process, a relief portion 16a that forms a gap is formed. Reference numeral 17 denotes a punch that slidably passes through the pressing member 16 and cuts and bends the plate-like member 13 by being inserted into the die hole 12 a of the die 12.
[0013]
Next, a description will be given of a cutting and bending process by the mold apparatus configured as described above.
First, as shown in FIG. 1A, the plate-like member 13 is placed on the upper surface of the die 12, and the plate-like member 13 is pressed by the pressing member 16. Next, the punch 17 is lowered as shown by an arrow in FIG. 1B, and the punch 17 is inserted into the die hole 12a of the die 12 as shown in FIG. After the bending process is performed, the plate-like member 13 is pushed up by the push-back member 14 and flattened as the punch 17 rises, although not shown in the drawing.
[0014]
Then, the outer shape is punched out in the same mold apparatus, and as shown in FIG. 2, a recess 18a and a projection 18b are formed on the back surface of one end side, and the end surface 18c is formed of the recess 18a and the projection 18b. A plurality of core pieces 18 that are formed in an arc shape centered on the center of the convex portion 18b and on the other end side are formed with end surfaces 18d that can be fitted with adjacent end surfaces 18c. A first core member 19 in which each core piece 18 is arranged in a band shape via each end face 18c, 18d, and a second core member in which each core piece 18 is alternately arranged in the longitudinal direction from the first core member 19 20 are alternately laminated, and the laminated core 21 is configured to be bendable by fitting the concave portions 18a and the convex portions 18b of the adjacent core pieces 18 in the lamination direction.
[0015]
As described above, according to the first embodiment, the lower surface of the pressing member 16 that presses the plate-like member 13 placed on the die 12 is cut into an area corresponding to the bending fulcrum of the plate-like member 13 for cutting and bending. Since the notch 16a is provided to form a gap between the plate-like member 13 and the pressing member 16, and the punch 17 is cut and bent, the plate-like member 13 is shown in FIG. ) And the lower surface of the plate-like member 13 does not come into contact with the corner where the upper surface of the die 12 and the opening of the die hole 12a intersect, and no deformation occurs in this portion. Moreover, the deterioration of the shape accuracy in the laminated state of the core members 19 and 20 is prevented, and the efficiency can be improved.
[0016]
Embodiment 2. FIG.
FIG. 3 is a cross-sectional view showing a part of a process of cutting and bending by a mold apparatus used for manufacturing a laminated core according to Embodiment 2 of the present invention.
In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Reference numeral 22 denotes a die in which a die hole 22a is formed at a part to be cut and bent, and a relief hole 22b is formed at a part corresponding to the position where the convex part 18b of the core piece 18 is formed. Reference numeral 23 denotes a pressing member disposed above the die 22, and a relief portion 23 a that forms a gap is provided in a region corresponding to the vicinity of the bending fulcrum of the cutting and bending process.
[0017]
Thus, according to the second embodiment, although not described in detail in the first embodiment, as shown in FIG. 3, the concave portion 18a and the convex portion 18b as the connecting portion are the sides to be cut and bent. Since the plate-like members 18 are arranged so as to be on different sides, it is possible to prevent the connection portion from being affected by cutting and bending, and the effect of providing the relief portion 23a. In combination with this, the efficiency can be further improved.
[0018]
In each of the first and second embodiments, the adjacent edges in the stacking direction of the core pieces are stacked so as to overlap each other, and the edges of the overlapping core pieces are connected to each other so as to be bendable by the concave and convex portions. Although the configuration has been described, the present invention is not limited to this, and a configuration in which a through hole is formed between edges instead of the concave portion and the convex portion, and a pin member is inserted into the through hole is further illustrated. 9, the edges of the core pieces 24 may be connected to each other by a thin portion 24a, and it goes without saying that the same effects as described above can be exhibited.
[0019]
【The invention's effect】
As described above, according to claim 1 of the present invention, a plate member is punched and cut and bent to form a core member in which a plurality of core pieces are connected in a band shape via a bendable connecting portion. In the manufacturing method of the laminated core in which the core members are laminated, since the upper part near the bending fulcrum of the cutting and bending is made unconstrained when performing the cutting and bending, the deterioration of the shape accuracy in the laminated state is prevented. In addition, it is possible to provide a method for manufacturing a laminated core capable of improving efficiency.
[0020]
According to a second aspect of the present invention, the core member is formed by arranging a plurality of core pieces formed in a predetermined shape by punching and cutting the plate-like member in a strip shape, In the manufacturing method of the laminated core, the adjacent cores are stacked so that adjacent edges overlap each other in the stacking direction of the core pieces, and a connecting portion that flexibly connects the edges of the overlapping core pieces is formed. When the bending process is performed, the upper part near the bending fulcrum of the cutting and bending process is set in an unconstrained state, so that a manufacturing method of a laminated core capable of preventing the deterioration of the shape accuracy in the laminated condition and improving the efficiency is provided. can do.
[0021]
According to claim 3 of the present invention, since the connecting portion is formed on the side different from the side to be cut and bent in claim 1 or 2, the deterioration of the shape accuracy in the laminated state is prevented. Furthermore, it is possible to provide a method for manufacturing a laminated core that can further improve the efficiency.
[0022]
According to a fourth aspect of the present invention, a core member is formed by punching and cutting a plate-like member to form a core member in which a plurality of core pieces are connected in a band shape via a bendable connecting portion. In the method of manufacturing a laminated core in which layers are laminated, a connecting portion is formed on a side different from the side to be cut and bent, so that deterioration of shape accuracy in the laminated state is prevented, and further improvement in efficiency is achieved. The manufacturing method of the lamination | stacking core which can be aimed at can be provided.
[0023]
According to claim 5 of the present invention, the plate-like member placed on one mold is pressed by the pressing member, and the projecting portion of the other mold is fitted into the opening of one mold. In a mold apparatus used for manufacturing a laminated core in which a core member is formed by forming a core member in which a plurality of core pieces are connected in a band shape through a connecting portion that can be bent and cut and bent. Since a gap is formed in a region corresponding to the vicinity of the bending fulcrum of the cutting and bending process of the plate-shaped member between the sheet-shaped member and the pressing member, it is possible to prevent deterioration of shape accuracy in the laminated state and improve efficiency. A mold apparatus used for manufacturing a laminated core can be provided.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing each step of performing cutting and bending by a mold apparatus used for manufacturing a laminated core according to Embodiment 1 of the present invention.
2 is a plan view showing a main part of a laminated core formed by the mold apparatus in FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing a part of a step of performing cutting and bending by a mold apparatus used for manufacturing a laminated core according to Embodiment 2 of the present invention.
FIG. 4 is a plan view showing a general configuration of a laminated core.
5 is a cross-sectional view showing a laminated state of the laminated core in FIG. 4. FIG.
6 is a cross-sectional view showing a configuration of concave and convex portions as connecting portions of the laminated core in FIG. 4;
7 is a front view showing a configuration of a stator formed using the laminated core in FIG. 4. FIG.
FIG. 8 is a cross-sectional view showing each step of cutting and bending with a mold apparatus used for manufacturing a conventional laminated core.
FIG. 9 is a plan view showing a general configuration of a laminated core different from that shown in FIG.
[Explanation of symbols]
12, 22 dies, 12a, 22a die holes, 16, 23 pressing members,
16a, 23a relief hole, 23b protrusion, 17 punch, 18 core piece,
18a concave portion, 18b convex portion, 18c, 18d end face, 19 first core member,
20 Second core member, 21 laminated core.

Claims (5)

板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、上記コア部材を積層するようにした積層コアの製造方法において、上記切り曲げ加工を施す際に上記切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたことを特徴とする積層コアの製造方法。A method of manufacturing a laminated core in which a plate member is punched and cut and bent to form a core member in which a plurality of core pieces are connected in a band shape via a connecting portion that can be bent, and the core members are stacked. The method for producing a laminated core according to claim 1, wherein the upper portion in the vicinity of the bending fulcrum of the cutting and bending is in an unrestrained state when the cutting and bending is performed. 板状部材に打ち抜きおよび切り曲げ加工を施して所定の形状に形成した複数のコア片を帯状に配列することによりコア部材を形成し、上記コア部材を上記コア片の積層方向に相隣なる縁部同士が重なり合うように積層するとともに、上記重なり合ったコア片の縁部同士を屈曲可能に連結する連結部を形成するようにした積層コアの製造方法において、上記切り曲げ加工を施す際に上記切り曲げ加工の曲げ支点近傍の上方を無拘束状態としたことを特徴とする積層コアの製造方法。A core member is formed by arranging a plurality of core pieces formed into a predetermined shape by punching and cutting a plate-like member, and the core members are adjacent to each other in the stacking direction of the core pieces. In the method of manufacturing a laminated core in which the layers are laminated so that the portions overlap each other, and a connecting portion that flexibly connects the edges of the overlapped core pieces is formed, the cutting is performed when the cutting is performed. A method for producing a laminated core, characterized in that an upper portion in the vicinity of a bending fulcrum of bending is unrestrained. 切り曲げ加工を施す側とは異なる側に連結部を形成するようにしたことを特徴とする請求項１または２記載の積層コアの製造方法。3. The method of manufacturing a laminated core according to claim 1, wherein the connecting portion is formed on a side different from the side on which the cutting and bending process is performed. 板状部材に打ち抜きおよび切り曲げ加工を施して、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、上記コア部材を積層するようにした積層コアの製造方法において、切り曲げ加工を施す側とは異なる側に上記連結部を形成するようにしたことを特徴とする積層コアの製造方法。A method of manufacturing a laminated core in which a plate member is punched and cut and bent to form a core member in which a plurality of core pieces are connected in a band shape via a connecting portion that can be bent, and the core members are stacked. The method for manufacturing a laminated core according to claim 1, wherein the connecting portion is formed on a side different from the side to be cut and bent. 一方の金型に載置された板状部材を押圧部材で押圧し上記一方の金型の開口に他方の金型の突出部を嵌入させることにより打ち抜きおよび切り曲げ加工を施し、屈曲可能な連結部を介し複数のコア片が帯状に連結されたコア部材を形成し、上記コア部材を積層するようにした積層コアの製造に用いる金型装置において、上記板状部材と押圧部材の間の上記板状部材の切り曲げ加工の曲げ支点近傍と対応する領域に隙間を形成したことを特徴とする積層コアの製造に用いる金型装置。A plate-like member placed on one mold is pressed with a pressing member, and the projecting part of the other mold is inserted into the opening of the one mold to perform punching and cutting and bending so that it can be bent. In a mold apparatus used for manufacturing a laminated core in which a plurality of core pieces are connected in a band shape via a section and the core members are laminated, the above-mentioned between the plate-like member and the pressing member A mold apparatus for use in manufacturing a laminated core, characterized in that a gap is formed in a region corresponding to the vicinity of a bending fulcrum for cutting and bending a plate member.
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