JP4688610B2 - Laminated iron core - Google Patents

Laminated iron core Download PDF

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JP4688610B2
JP4688610B2 JP2005241412A JP2005241412A JP4688610B2 JP 4688610 B2 JP4688610 B2 JP 4688610B2 JP 2005241412 A JP2005241412 A JP 2005241412A JP 2005241412 A JP2005241412 A JP 2005241412A JP 4688610 B2 JP4688610 B2 JP 4688610B2
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caulking
iron core
laminated
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core piece
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和彦 梅田
秀一 中村
秀樹 松尾
秀男 山本
天祐 牟田
徳夫 鳥巣
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Mitsui High Tech Inc
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Description

本発明は、例えばモータあるいは発電機の固定子又は回転子として使用される積層鉄心に関する。 The present invention relates to a laminated core used as a stator or a rotor of a motor or a generator, for example.

一般の電動機及び発電機は、固定子及びその内部に配置された回転子を有し、この固定子、例えば、固定子積層鉄心は多数枚の薄板材からなる鉄心片をプレス加工によって連続的に形成し、同時にプレス加工によってかしめ部を所定位置に形成して、多数枚の薄板材からなる鉄心片をこのかしめ部を介して積層連結していた（特許文献１参照）。このかしめ部としては、一般には「半抜きかしめ」と「Ｖ字かしめ」が使用されている。半抜きかしめは、円形の窪みを表面側に、裏面側に円形の突起を突出させたものであり、それぞれ丸い突起と窪みを嵌合させて上下の鉄心片を連結するものである。一方、Ｖ字かしめは断面Ｖ字状の窪みを表面側に、断面Ｖ字状の突起を裏面側に突出させ、上下の鉄心片をそれぞれ断面Ｖ字状の突起と窪みによって連結するものであった。従って、従来の積層鉄心における鉄心片は上下に連結される鉄心片が全く同一形状であった。 General electric motors and generators have a stator and a rotor arranged therein, and this stator, for example, a stator laminated core, is formed by continuously pressing core pieces made of a plurality of thin plate materials by pressing. At the same time, the caulking portion was formed at a predetermined position by press working, and iron core pieces made of a large number of thin plate members were laminated and connected via the caulking portion (see Patent Document 1). As this caulking part, “half-cut caulking” and “V-shaped caulking” are generally used. Half-cut caulking is one in which circular depressions are projected on the front side and circular projections are projected on the back side, and the upper and lower core pieces are connected by fitting round projections and depressions, respectively. On the other hand, the V-shaped caulking has a V-shaped recess on the front side, a V-shaped projection on the back side, and the upper and lower core pieces are connected to the V-shaped projection and the recess, respectively. It was. Therefore, the core pieces in the conventional laminated core have the same shape as the core pieces connected vertically.

特開平１１−１８７５９２号公報（図１、図２）Japanese Patent Application Laid-Open No. 11-187592 (FIGS. 1 and 2)

しかしながら、かしめ部の形成はプレス加工によって行われているので、鉄心片にスタンピングオイルが付着し、製品にもそのまま付着している。このスタンピングオイルをそのまま残しておくと、溶接時に煤になる等の弊害があるので、一般にはこの油は溶接加工を行う前に、強制的に除去するか又は数日かけて乾燥させる必要があるが、特に、積層される薄板材の間に残った油は除去し難いという問題があった。
また、各薄板材はプレス加工によって形成されるので、薄板材内部に残留応力や残留歪が残っている場合があり、これによって製品となった後徐々に薄板材が変形したり、あるいは磁気的特性が変わる等の問題があるので、焼鈍処理を行っているが、各薄板材が積層されていると、内部まで熱が通りにくく、加熱に時間がかかるという問題があった。
更には、各薄板材の接合強度を増すために、多数のかしめ部を介して各薄板材を連結すると、コアの磁気的特性に影響を与えるので、接着剤を用いて各薄板材を接合する場合があり、この場合、プレス過程で行うことはスタンピングオイルを使用する関係で実行しにくく、組み立て後に行うと各薄板材の間に接着剤が浸透しにくという問題があった。 However, since the caulking portion is formed by pressing, stamping oil adheres to the iron core piece and also adheres to the product as it is. If this stamping oil is left as it is, there is a harmful effect such as fouling at the time of welding, so this oil generally needs to be forcibly removed or dried over several days before welding. However, there is a problem that it is difficult to remove the oil remaining between the laminated thin plates.
In addition, since each thin plate material is formed by pressing, residual stress or residual strain may remain inside the thin plate material, which may cause the thin plate material to be gradually deformed or become magnetic after it becomes a product. Since there is a problem such as a change in characteristics, annealing is performed. However, when each thin plate material is laminated, there is a problem that it is difficult for heat to pass to the inside and it takes time for heating.
Furthermore, in order to increase the bonding strength of each thin plate material, connecting the respective thin plate materials through a large number of caulking portions affects the magnetic properties of the core, so that each thin plate material is bonded using an adhesive. In this case, there is a problem that it is difficult to carry out in the press process because of the use of stamping oil, and when it is carried out after assembly, the adhesive hardly penetrates between the thin plate materials.

本発明はかかる事情に鑑みてなされたもので、スタンピングオイルの除去が容易で、かつ焼鈍も短時間で行え、更には、各鉄心片間に接着剤を塗布する場合はその作業も容易な積層鉄心を提供することを目的とする。 The present invention has been made in view of such circumstances, and it is easy to remove the stamping oil, can be annealed in a short time, and furthermore, when applying an adhesive between the core pieces, lamination is also easy. The purpose is to provide an iron core.

前記目的に沿う本発明に係る積層鉄心は、中央に開口部を有する複数枚の同一形状の薄板材からなる鉄心片をかしめ突起と該かしめ突起が密着嵌入するかしめ孔を用いて積層して形成する積層鉄心であって、
それぞれ上下対となる前記鉄心片の同一位置に係合する前記かしめ突起と前記かしめ孔とを交互に形成し、積層された該積層鉄心を積層方向に、前記かしめ突起と前記かしめ孔との係合力以下で引っ張り荷重をかけた場合、前記各鉄心片の前記かしめ突起と前記かしめ孔とで連結されていない部分が弾性変形して、前記各鉄心片の間に隙間が形成される。
なお、鉄心片の厚みは一般には０．３〜２ｍｍ程度であるが、積層鉄心の大きさによっても異なり、本発明はこれらの寸法には限定されない。 The laminated iron core according to the present invention that meets the above object is formed by laminating a plurality of pieces of the same-shaped thin plate material having an opening at the center using a caulking protrusion and a caulking hole into which the caulking protrusion is closely fitted. A laminated iron core that
The caulking projections and the caulking holes that engage with the same position of the iron core pieces that are paired in the upper and lower directions are alternately formed, and the laminated cores are laminated in the laminating direction, and the caulking projections and the caulking holes When a tensile load is applied below the resultant force, the portions of the iron core pieces that are not connected by the caulking protrusions and the caulking holes are elastically deformed, and gaps are formed between the iron core pieces.
In addition, although the thickness of an iron core piece is generally about 0.3-2 mm, it changes also with the magnitude | sizes of a laminated iron core, and this invention is not limited to these dimensions.

そして、本発明に係る積層鉄心において、前記かしめ孔とかしめ突起は一枚の前記鉄心片に対してそれぞれ２箇所あって、前記各かしめ孔とかしめ突起は、前記鉄心片の中心を基準にしてそれぞれ９０度位相で形成されているのが好ましい。
これによって、各鉄心片の変形する部分の幅に対する長さが長くなって、より効率的に各鉄心片の間に隙間が形成される。 In the laminated iron core according to the present invention, the caulking hole and the caulking projection are respectively provided at two positions with respect to one iron core piece, and the caulking hole and the caulking protrusion are based on the center of the iron core piece. Each of them is preferably formed with a phase of 90 degrees.
Thereby, the length with respect to the width | variety of the part which each core piece deform | transforms becomes long, and a clearance gap is formed between each core piece more efficiently.

また、本発明に係る積層鉄心において、前記中央の開口部の直径は、前記鉄心片の中心を通る最大幅の０．３〜０．８倍の範囲にあるのがよい。中央の開口部の直径が鉄心片の中心を通る最大幅の０．３倍未満であると、変形する部分の幅が大きくなって変形困難となり、中央の開口部の直径が鉄心片の中心を通る最大幅の０．８倍を超えるということは、界磁（ヨーク）の幅が狭くなって適切な磁路を形成しない。 Moreover, the laminated iron core which concerns on this invention WHEREIN: It is good for the diameter of the said center opening part to exist in the range of 0.3 to 0.8 times the maximum width which passes the center of the said iron core piece. If the diameter of the central opening is less than 0.3 times the maximum width passing through the center of the core piece, the width of the deformed part becomes large and it becomes difficult to deform, and the diameter of the central opening is less than the center of the core piece. If it exceeds 0.8 times the maximum width to pass, the width of the field (yoke) becomes narrow and an appropriate magnetic path is not formed.

請求項１〜３記載の積層鉄心は、積層された積層鉄心を積層方向に、かしめ突起とかしめ孔との係合力以下で引っ張り荷重をかけた場合、各鉄心片の間に隙間が形成されるので、スタンピングオイルの洗浄が容易である。また、各鉄心片間に隙間を形成した状態で焼鈍を行うと、短時間で所望温度に均一に加熱することができ生産性が高まると共に、積層鉄心の磁気的特性にすぐれる。
そして、各鉄心片間に接着剤を塗布する場合には、各鉄心片間に隙間を設けることが可能であれば、極めて簡単に接着剤を塗布できる。 In the laminated core according to any one of claims 1 to 3, when a tensile load is applied to the laminated iron core in the laminating direction at a force equal to or less than the engagement force between the caulking protrusion and the caulking hole, a gap is formed between the iron core pieces. Therefore, it is easy to wash the stamping oil. Further, if annealing is performed with a gap formed between each iron core piece, it can be uniformly heated to a desired temperature in a short time, and the productivity is improved and the magnetic properties of the laminated iron core are excellent.
And when apply | coating an adhesive agent between each iron core piece, if a clearance gap can be provided between each iron core piece, an adhesive agent can be apply | coated very easily.

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は本発明の一実施の形態に係る積層鉄心の各鉄心片の接続状況を示す説明図、図２は同積層鉄心の平面図、図３は同積層鉄心の断面図、図４は同積層鉄心を引き延ばした状態の断面図、図５は本発明の他の実施の形態に係る積層鉄心の斜視図である。 Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view showing a connection state of each core piece of the laminated core according to one embodiment of the present invention, FIG. 2 is a plan view of the laminated core, and FIG. 3 is a sectional view of the laminated core. 4 is a cross-sectional view of the laminated iron core in a stretched state, and FIG. 5 is a perspective view of the laminated iron core according to another embodiment of the present invention.

図２、図３に示すように、本発明の一実施の形態に係る積層鉄心１０及びこれを構成する各鉄心片１１、１２は平面視して角部が丸められた正方形となって、中央に円形の開口部１３が形成されている。なお、通常の電動機又は発電機の固定子積層鉄心の場合には、内側に磁極部を有し、回転子積層鉄心の場合には、外周が真円状に形成されているが、この積層鉄心１０は説明を容易にするため、形状を変えて記載している。
この開口部１３の内径は鉄心片１１、１２の対角線の長さの０．３〜０．８倍の長さとなっている。鉄心片１１、１２は同一形状の薄板材（磁性鋼板）であって、対となるかしめ突起１４が向かい合って形成され、この対となるかしめ突起１４とそれぞれ９０度位相をずらして対となるかしめ孔１５が向かい合って形成されている。
この実施の形態では、かしめ突起１４は図１に示すように、下方にこの鉄心片１１、１２の板厚分又はこの板厚より僅少短い高さで突出するＶ字曲げ部１６によって形成されている。一方、かしめ孔１５は平面視して矩形の貫通孔からなって、かしめ突起１４が丁度嵌入する大きさとなっている。 As shown in FIG. 2 and FIG. 3, the laminated core 10 according to one embodiment of the present invention and each of the core pieces 11 and 12 constituting the same are formed into squares with rounded corners in plan view. A circular opening 13 is formed in the top. In the case of a stator laminated core of a normal motor or generator, a magnetic pole portion is provided on the inner side. In the case of a rotor laminated core, the outer periphery is formed in a perfect circle shape. For ease of explanation, reference numeral 10 is shown in a different shape.
The inner diameter of the opening 13 is 0.3 to 0.8 times the length of the diagonal line of the iron core pieces 11 and 12. The iron core pieces 11 and 12 are thin plate materials (magnetic steel plates) having the same shape, and are formed with a pair of caulking projections 14 facing each other, and the caulking projections 14 that form a pair are caulked with a phase shifted by 90 degrees. The holes 15 are formed facing each other.
In this embodiment, as shown in FIG. 1, the caulking protrusion 14 is formed by a V-shaped bent portion 16 that protrudes downward at a height corresponding to the thickness of the iron core pieces 11 and 12 or slightly shorter than the thickness. Yes. On the other hand, the caulking hole 15 is a rectangular through hole in plan view, and has a size such that the caulking protrusion 14 is just inserted.

即ち、鉄心片１１と鉄心片１２とは、それぞれかしめ突起１４及びかしめ孔１５が鉄心片の中心を基準にして、それぞれ９０度位相を変えて形成されている。また、鉄心片１１と鉄心片１２とは同一形状であるが、鉄心片１２が鉄心片１１に対して９０度位相を変えて配置されている。これによって、鉄心片１１の下方に突出するかしめ突起１４が、鉄心片１１に密接してその下方に配置されている鉄心片１２のかしめ孔１５に密着嵌入し、鉄心片１２に形成されて下方に突出するかしめ突起１４が更にその下方の鉄心片１１のかしめ孔１５に密着嵌入する。このような状態を所定枚数繰り返して、図３に示す積層鉄心１０が形成されている。
この鉄心片１１、１２の製造にあっては、プレス装置の同一ステーションで各鉄心片を順次打ち抜き形成し、次のステーションが一方側の鉄心片１１又は１２を９０度回転させてもよいし、プレス装置の別々のステーションが鉄心片１１、１２をそれぞれ形成してもよい。 That is, the iron core piece 11 and the iron core piece 12 are respectively formed with the caulking protrusion 14 and the caulking hole 15 being shifted by 90 degrees with respect to the center of the iron core piece. Further, the iron core piece 11 and the iron core piece 12 have the same shape, but the iron core piece 12 is arranged with a phase difference of 90 degrees with respect to the iron core piece 11. As a result, the caulking protrusion 14 projecting downward from the core piece 11 is closely fitted into the caulking hole 15 of the iron core piece 12 disposed in close contact with the iron core piece 11, and is formed on the iron core piece 12. The caulking protrusion 14 projecting into the inner wall of the iron core piece 11 is further closely fitted into the caulking hole 15 of the iron core piece 11 therebelow. A laminated core 10 shown in FIG. 3 is formed by repeating such a state a predetermined number of times.
In the manufacture of the iron core pieces 11 and 12, each iron core piece may be sequentially punched and formed at the same station of the press device, and the next station may rotate the iron core piece 11 or 12 on one side by 90 degrees, Separate stations of the pressing device may form the core pieces 11, 12, respectively.

このようにして構成された積層鉄心１０を上下方向にかしめ突起１４とかしめ孔１５との接合強度（即ち、かしめ力、係合力）以内の荷重で引き延ばすと、図４に示すように、隣り合うかしめ部（かしめ突起１４とかしめ孔１５によって連結された部分）によって連結されていない部分１７が弾性的に曲がり、各鉄心片１１、１２の間に隙間１８が形成される。この隙間１８は鉄心片１１、１２の厚みが薄い程、及び開口部１３の直径が大きくかしめ部によって連結されていない部分１７の幅が狭い程、弾性限界内で大きく変形する。また、引っ張り力を解くと積層鉄心１０は図３に示すような元の形状状態に精度よく戻る。 When the laminated iron core 10 constructed in this way is extended with a load within the joining strength (ie, caulking force, engaging force) between the caulking protrusion 14 and the caulking hole 15 in the vertical direction, as shown in FIG. A portion 17 not connected by the caulking portion (portion connected by the caulking protrusion 14 and the caulking hole 15) is elastically bent, and a gap 18 is formed between the iron core pieces 11 and 12. The gap 18 is greatly deformed within the elastic limit as the thickness of the iron core pieces 11 and 12 is decreased and the width of the portion 17 not connected by the caulking portion is narrower as the diameter of the opening 13 is larger. When the tensile force is released, the laminated core 10 returns to the original shape as shown in FIG. 3 with high accuracy.

従って、鉄心片１１、１２の間に隙間１８を形成した状態で、積層鉄心１０の洗浄を行えば、洗浄液が効率よく通過してスタンピングオイルの除去ができる。また、鉄心片１１、１２の隙間１８を開けた状態で焼鈍を行えば、高温ガスが鉄心片１１、１２間を支障なく通過するので、短時間で焼鈍が可能となる。更に、鉄心片１１、１２の隙間１８を開けた状態で接着剤を塗布すれば、鉄心片１１、１２の表面に略まんべんなく接着剤を塗布することができ、かしめ突起１４とかしめ孔１５で不足する接合強度を補うことができる。 Therefore, if the laminated core 10 is cleaned in the state where the gap 18 is formed between the core pieces 11 and 12, the cleaning liquid can pass efficiently and the stamping oil can be removed. Further, if annealing is performed with the gap 18 between the iron core pieces 11 and 12 being opened, the high temperature gas passes between the iron core pieces 11 and 12 without any trouble, so that annealing can be performed in a short time. Furthermore, if the adhesive is applied with the gaps 18 between the core pieces 11 and 12 being opened, the adhesive can be applied almost evenly on the surfaces of the core pieces 11 and 12, and the caulking projections 14 and the caulking holes 15 are insufficient. It is possible to supplement the bonding strength.

前記実施の形態において、一つの鉄心片１１、１２にそれぞれ対となるかしめ突起１４及びかしめ孔１５を形成したが、３つ以上のかしめ突起とかしめ孔をそれぞれが嵌入するように形成する場合も本発明は適用される。この場合、かしめ部の数が増加する程、積層鉄心に引っ張り荷重をかけた場合の上下隣り合う鉄心片の隙間が減少するので、一つの鉄心片に対するかしめ突起及びかしめ孔の数はそれぞれ４つ以内とするのがよい。
更には、前記実施の形態に係る積層鉄心は積層枚数を増加させると積層鉄心全体をＵ字状又は場合によってリング状にも形成できる。また、かしめ突起は半抜きかしめとすることもできる。 In the above-described embodiment, the caulking projections 14 and the caulking holes 15 that are paired with each of the iron core pieces 11 and 12 are formed. The present invention applies. In this case, as the number of caulking portions increases, the gap between adjacent upper and lower iron core pieces when a tensile load is applied to the laminated iron core decreases. Should be within.
Furthermore, when the number of laminated iron cores according to the embodiment is increased, the whole laminated iron core can be formed in a U shape or, in some cases, a ring shape. Further, the caulking projection can be half-cut caulking.

また、前記実施の形態において、平面視して実質四角形の積層鉄心１０を用いて、固定子積層鉄心及び回転子積層鉄心を代表させたが、図５に本発明を適用させた固定子積層鉄心２０を示す。図５において、上下方向に積層された個々の鉄心片２１についてかしめ突起１４とかしめ孔１５の位置が交互に９０度位置を変えて形成されている。
また、図５は固定子積層鉄心２０を示しているが、中央に軸孔を備える回転子積層鉄心にも当然本発明は適用できる。 Moreover, in the said embodiment, the stator laminated iron core and the rotor laminated iron core were represented using the substantially square laminated iron core 10 in plan view, but the stator laminated iron core to which the present invention is applied in FIG. 20 is shown. In FIG. 5, the positions of the caulking projections 14 and the caulking holes 15 are alternately changed by 90 degrees with respect to the individual core pieces 21 stacked in the vertical direction.
5 shows the stator laminated core 20, the present invention can naturally be applied to a rotor laminated core having a shaft hole in the center.

本発明の一実施の形態に係る積層鉄心の各鉄心片の接続状況を示す説明図である。It is explanatory drawing which shows the connection condition of each core piece of the laminated core which concerns on one embodiment of this invention. 同積層鉄心の平面図である。It is a top view of the laminated core. 同積層鉄心の断面図である。It is sectional drawing of the same laminated iron core. 同積層鉄心を引き延ばした状態の断面図である。It is sectional drawing of the state which extended the same laminated iron core. 本発明の他の実施の形態に係る積層鉄心の斜視図である。It is a perspective view of the laminated iron core which concerns on other embodiment of this invention.

符号の説明Explanation of symbols

１０：積層鉄心、１１、１２：鉄心片、１３：開口部、１４：かしめ突起、１５：かしめ孔、１６：Ｖ字曲げ部、１７：部分、１８：隙間、２０：固定子積層鉄心、２１：鉄心片 10: laminated iron core, 11, 12: iron core piece, 13: opening, 14: caulking protrusion, 15: caulking hole, 16: V-shaped bent part, 17: part, 18: gap, 20: stator laminated iron core, 21 : Iron core piece

Claims (3)

中央に開口部を有する複数枚の同一形状の薄板材からなる鉄心片をかしめ突起と該かしめ突起が密着嵌入するかしめ孔を用いて積層して形成する積層鉄心であって、
それぞれ上下対となる前記鉄心片の同一位置に係合する前記かしめ突起と前記かしめ孔とを交互に形成し、積層された該積層鉄心を積層方向に、前記かしめ突起と前記かしめ孔との係合力以下で引っ張り荷重をかけた場合、前記各鉄心片の前記かしめ突起と前記かしめ孔とで連結されていない部分が弾性変形して、前記各鉄心片の間に隙間が形成されることを特徴とする積層鉄心。 A laminated core formed by laminating a plurality of sheets of the same shape thin plate material having an opening in the center using a caulking protrusion and a caulking hole into which the caulking protrusion is closely fitted,
The caulking projections and the caulking holes that engage with the same position of the iron core pieces that are paired in the upper and lower directions are alternately formed, and the laminated cores are laminated in the laminating direction, and the caulking projections and the caulking holes When a tensile load is applied below the resultant force, a portion of each iron core piece that is not connected by the caulking projection and the caulking hole is elastically deformed, and a gap is formed between each iron core piece. A laminated iron core. 請求項１記載の積層鉄心において、前記かしめ孔とかしめ突起は一枚の前記鉄心片に対してそれぞれ２箇所あって、前記各かしめ孔とかしめ突起は、前記鉄心片の中心を基準にしてそれぞれ９０度位相で形成さ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 caulking hole and the caulking projection are respectively provided at two positions with respect to one piece of the iron core piece, and the caulking hole and the caulking projection are respectively based on a center of the iron core piece. A laminated iron core characterized by being formed in a 90-degree phase. 請求項１及び２のいずれか１項に記載の積層鉄心において、前記中央の開口部の直径は、前記鉄心片の中心を通る最大幅の０．３〜０．８倍の範囲にあることを特徴とする積層鉄心。 3. The laminated core according to claim 1, wherein a diameter of the central opening is in a range of 0.3 to 0.8 times a maximum width passing through a center of the core piece. Characteristic laminated iron core.
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WO2020003906A1 (en) * 2018-06-29 2020-01-02 日本電産株式会社 Stacked core
JP7187287B2 (en) * 2018-11-30 2022-12-12 株式会社三井ハイテック Laminated core product manufacturing method

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH11187592A (en) * 1997-12-18 1999-07-09 Techno Excel Co Ltd Method of fixing stator iron core of motor
JP2001173741A (en) * 1999-11-08 2001-06-26 Luk Lamellen & Kupplungsbau Gmbh Transmission device
JP2004328865A (en) * 2003-04-23 2004-11-18 Mitsui High Tec Inc Skew-form variable laminated iron core and its manufacturing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11187592A (en) * 1997-12-18 1999-07-09 Techno Excel Co Ltd Method of fixing stator iron core of motor
JP2001173741A (en) * 1999-11-08 2001-06-26 Luk Lamellen & Kupplungsbau Gmbh Transmission device
JP2004328865A (en) * 2003-04-23 2004-11-18 Mitsui High Tec Inc Skew-form variable laminated iron core and its manufacturing method

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