WO2012057100A1 - Divided iron core and manufacturing method therefor - Google Patents

Divided iron core and manufacturing method therefor Download PDF

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Publication number
WO2012057100A1
WO2012057100A1 PCT/JP2011/074477 JP2011074477W WO2012057100A1 WO 2012057100 A1 WO2012057100 A1 WO 2012057100A1 JP 2011074477 W JP2011074477 W JP 2011074477W WO 2012057100 A1 WO2012057100 A1 WO 2012057100A1
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Prior art keywords
welding
iron core
split
core
divided
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PCT/JP2011/074477
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French (fr)
Japanese (ja)
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東　義高
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株式会社 明電舎
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Publication of WO2012057100A1 publication Critical patent/WO2012057100A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots

Definitions

  • the present invention relates to a split iron core and a method for manufacturing the same.
  • the idea is added to the method of stacking the divided core blocks.
  • Fig. 5 shows a general method for manufacturing a split core.
  • a cylindrical guide 10 is used to arrange arcuate electromagnetic steel plates (hereinafter referred to as divided cores) 20 one by one, and the divided iron core is shaped. That is, the inner diameter of the split core 20 is adjusted to the outer diameter of the columnar guide 10, and the groove of the split core 20 is fitted into the key 11 formed along the axial direction to the outer diameter of the guide 10.
  • divided cores arcuate electromagnetic steel plates
  • the laminated cores 20 are pressed by the hasher 30, further pressed by the glasses 40 so that the iron core is not opened, and the outer periphery is welded by the welding plate 50.
  • the hasher 30 is a plate having a thickness of 2 to 3 mm that suppresses the opening of the stator teeth
  • the pair of glasses 40 is a ring that fixes the hasher 30 and is fixed by welding to the welding plate 50.
  • the same structure is disclosed also in patent documents 1, 2 about the split iron core.
  • the split cores 20 are arranged one by one to manufacture the split iron core, which requires processing man-hours.
  • the iron core opens. Specifically, as shown in FIG. 7 (a), pressure is applied in the axial direction when the iron core is welded, but the pressure is released after welding, and as shown in FIG. It will cool and shrink as shown by the arrow. Moreover, the yoke portion 22 of the split iron core is thinner than the tooth portion 23. Therefore, as shown by arrows in FIG. 8, if the rigidity of the divided iron core is insufficient, the iron core opens (raises) due to distortion.
  • welding distortion can be absorbed by increasing the rigidity of the yoke portion 22 in the same manner as the tooth portion 23 to increase the rigidity.
  • the split core according to claim 1 of the present invention that solves the above problems is a split core that is formed by connecting arc-shaped split core blocks formed by laminating thin metal plates in an annular shape and stacking them in the thickness direction.
  • welding grooves are formed at equal intervals in the circumferential direction along the central axis.
  • a welding plate thinner than the depth of the welding groove is welded to the welding grooves, and further in the thickness direction.
  • the positions in the circumferential direction of the divided core blocks that are stacked are shifted at every interval at which the weld grooves are formed in the circumferential direction.
  • the split iron core according to claim 2 of the present invention for solving the above-mentioned problems is characterized in that in the split iron core according to claim 1, the weld groove is in close contact with the weld plate without a gap.
  • a split iron core according to claim 3 of the present invention for solving the above-mentioned problems is characterized in that in the split iron core according to claim 1 or 2, the metal thin plates are joined at a caulking portion.
  • the method of manufacturing a split core according to claim 4 of the present invention that solves the above-described problem includes a step of stacking metal thin plates to form an arc-shaped split core block, connecting the core blocks in an annular shape, and thickness.
  • the circumferential positions of the divided core blocks stacked in the thickness direction are the circumferential intervals of the weld grooves formed at equal intervals in the circumferential direction along the central axis on the outer peripheral surface of the divided core block. It is characterized by comprising a step of shifting each time and a step of welding a weld plate thinner than the depth of the welding groove to the welding groove.
  • the number of man-hours can be reduced since the split blocks are stacked instead of stacking the thin metal plates as compared with the conventional method described in the background art section.
  • the metal thin plates are joined by the caulking portion to form the divided blocks, there is no opening of the iron core, and the hash and the glasses can be omitted.
  • the lower surface of the weld groove and the weld plate are in close contact with each other, there is no caulking off due to distortion generated when the welded portion is cooled.
  • the frame can be frayed by hitting a surface without a weld groove.
  • FIG. 4A is an explanatory view showing a state in which the weld plate is welded to the outer peripheral surface of the yoke portion
  • FIG. 4B is an explanatory view showing a state in which the weld plate is welded to the weld groove. It is explanatory drawing of the manufacturing method of the conventional common division
  • FIG. 6A is a cross-sectional view illustrating a state in which the hash resistor and the glasses are fixed to the split core
  • FIG. 6B is a perspective view illustrating a state in which the hash resistor and the glasses are fixed to the split core.
  • FIG. 7A is an explanatory diagram of an iron core having a small yoke portion thickness
  • FIG. 7B is an explanatory diagram of an iron core having a large yoke portion thickness. It is a perspective view which shows the iron core opened by shrinkage
  • FIG. 1 is a plan view of a split core block
  • FIG. 2 is a perspective view of the split core block
  • FIG. 3 is a perspective view showing a manufacturing process of the split core.
  • the divided core block 1 is an arc-shaped block formed by laminating thin metal plates such as electromagnetic steel plates, and between the yoke portion 1 a that is an outer peripheral portion and the groove portion 1 c in the inner peripheral portion. And a plurality of teeth 1b formed at equal intervals in the circumferential direction.
  • the thickness of the laminated metal thin plates is, for example, 0.5 mm, and the number of laminated metal thin plates is, for example, about 10 to 20.
  • caulking portions 2 are formed at equal intervals in the circumferential direction on the yoke portion 1a in the divided core block 1, and caulking portions 2 are formed on the tooth portions 1b, respectively.
  • the split iron core block 1 is assembled by joining thin plates.
  • the crimped portion 2 is a concave portion and a convex portion formed by press molding.
  • welding grooves 1d are formed at equal intervals in the circumferential direction along the axial direction.
  • the axial direction is a divided iron core formed by connecting the divided iron core blocks 1 in an annular shape (ring shape), that is, the direction of the central axis of the completed divided iron core.
  • the bottom surface of the welding groove 1d is a plane perpendicular to the imaginary line in the radial direction (indicated by the alternate long and short dash line in the figure) with respect to the central axis (a straight line perpendicular to the vertical symbol in FIG. 1). ing.
  • a half-width welding groove 1d is disposed at both ends of the divided core block 1, and two welding grooves 1d are disposed therebetween.
  • a welding plate 3 thinner than the depth of the welding groove 1d is welded to each welding groove 1d.
  • the welding plate 3 is a flat plate having a rectangular cross section. Therefore, the height of the weld plate 3 welded to the welding groove 1d is lower than the outer peripheral surface located between the welding grooves 1d. Therefore, the outer peripheral surface located between the welding grooves 1d comes into contact with the frame (not shown). That is, the surface without the welding groove 1d hits the frame.
  • the bottom surface of the welding groove 1d is a plane perpendicular to the radial imaginary line with respect to the central axis
  • the welding plate 3 is a flat plate having a rectangular cross section.
  • the weld plate 3 comes into close contact.
  • FIG. 4A when the welding plate 3 is welded to the outer peripheral surface of the yoke portion 1a, the welded portion 3a is thickened to fill the gap with the outer peripheral surface of the yoke portion 1a, and the shrinkage is large. Become. Therefore, there was a risk of opening (peeling) by being pulled by the stress indicated by the arrow in the figure.
  • the weld plate 3 is in close contact with the bottom surface of the welding groove 1d, so that the welded portions 3a located on both sides of the weld plate 3 have a relatively small thickness. There is an advantage that the stress is small.
  • the divided core block 1 is shaped into an arc-shaped block having a thickness of 5 to 10 mm by progressive caulking.
  • progressive caulking refers to fixing a metal thin plate such as an electromagnetic steel sheet one by one using a progressive die.
  • the split core block 1 is shifted along the cylindrical guide 4 at intervals (hereinafter referred to as weld groove pitch) ⁇ in which the weld grooves 1d are formed in the circumferential direction. Arranged in an annular shape and stacked in the thickness direction to form a split iron core.
  • the position A of the divided core block 1 that is stacked in the first stage in the thickness direction is connected to the annular position of the divided core block 1 in the second stage in the circumferential direction.
  • the welding groove pitch ⁇ is shifted, and the third stage is similarly shifted further in the circumferential direction by the welding groove pitch ⁇ .
  • the split core block 1 is three times larger than the welding groove pitch ⁇ , the split core block 1 in the first stage and the position A connected to the annular shape of the split core block 1 in the fourth stage.
  • the position A connected in an annular shape coincides with the vertical direction.
  • the weld plate 3 is welded to the weld groove 1d of the split iron core.
  • the welding method is the same as the conventional method, the weld groove 1d is deeper than the thickness of the weld plate 3, so that the surface without the weld groove 1d hits the frame.
  • the split iron core and the manufacturing method thereof according to the present embodiment since the split blocks 1 are stacked instead of stacking the thin metal plates, the man-hours are increased. Can be reduced.
  • the metal thin plates are joined by progressive caulking to form the divided block 1, there is no opening of the iron core, and it is possible to omit the hash and the glasses.
  • the lower surface of the weld groove 1d and the weld plate 3 are in close contact, there is no staking peeling due to distortion that occurs when the welded portion is cooled. In particular, when the surface without the weld groove 1d hits the frame, it can be frayed.
  • the present invention is widely applicable industrially as a split iron core and a manufacturing method thereof.

Abstract

A divided iron core comprising arc-shaped divided-iron-core blocks (1), each of which comprises laminated sheet metal, joined so as to form a ring and stacked in the thickness direction. Welding grooves (1d) are formed in the outer surface of said divided iron core (1) at equal intervals in the circumferential direction around the central axis, and welding plates (3) thinner than the welding grooves (1d) are deep are welded in said welding grooves (1d). The circumferential positions of the divided-iron-core blocks (1) stacked in the thickness direction are offset per interval (θ) separating the welding grooves (1d) in the circumferential direction, thereby making it possible to reduce the amount of labor required and preventing the iron core from opening.

Description

分割鉄心及びその製造方法Split iron core and manufacturing method thereof
　本発明は、分割鉄心及びその製造方法に関する。詳しくは、分割鉄心ブロックの積み重ね方に工夫を加えたものである。 The present invention relates to a split iron core and a method for manufacturing the same. In detail, the idea is added to the method of stacking the divided core blocks.
　一般的な分割鉄心の製造方法を図５に示す。同図に示すように、円柱状のガイド１０を使い、円弧状の電磁鋼板（以下、分割コアという）２０を１枚ずつ並べて、分割鉄心を整形する。即ち、円柱状のガイド１０の外径に分割コア２０の内径を合わせると共に、ガイド１０の外径に軸方向に沿って形成されたキー１１に分割コア２０の溝を嵌め込んで揃える。 Fig. 5 shows a general method for manufacturing a split core. As shown in the figure, a cylindrical guide 10 is used to arrange arcuate electromagnetic steel plates (hereinafter referred to as divided cores) 20 one by one, and the divided iron core is shaped. That is, the inner diameter of the split core 20 is adjusted to the outer diameter of the columnar guide 10, and the groove of the split core 20 is fitted into the key 11 formed along the axial direction to the outer diameter of the guide 10.
　そして、分割コア２０の分割部分を、数枚並べた時点で別の場所に移動させる。つまり、作業者は、０．５ｍｍ程の厚さのコア２０を５枚程積むと周方向に移動して、もう一度同じように積むことを繰り返す。 Then, when several divided parts of the divided core 20 are arranged, they are moved to another place. That is, when the operator stacks about five cores 20 having a thickness of about 0.5 mm, the worker moves in the circumferential direction and repeats the same stacking again.
　引き続き、図６に示すように、積層された分割コア２０をハシイタ３０で押さえ、更にシメガネ４０で鉄心が開かないように押さえ、外周を溶接板５０にて溶接する。ハシイタ３０は、ステータ歯の開きを抑える厚さ２－３ｍｍの板であり、シメガネ４０は、ハシイタ３０を固定するリングであり、溶接板５０と溶接することで固定する。
　なお、分割鉄心については、特許文献１，２にも同様な構造が開示されている。 Subsequently, as shown in FIG. 6, the laminated cores 20 are pressed by the hasher 30, further pressed by the glasses 40 so that the iron core is not opened, and the outer periphery is welded by the welding plate 50. The hasher 30 is a plate having a thickness of 2 to 3 mm that suppresses the opening of the stator teeth, and the pair of glasses 40 is a ring that fixes the hasher 30 and is fixed by welding to the welding plate 50.
In addition, the same structure is disclosed also in patent documents 1, 2 about the split iron core.
特開２００４－３２０８７８JP 2004-320878 A 特開２００２－２９１１８４JP 2002-291184 A
　上述した一般的な分割鉄心製造方法では、分割コア２０を１枚１枚並べて、分割鉄心を製造するため、加工工数がかかる。 In the above-described general split iron core manufacturing method, the split cores 20 are arranged one by one to manufacture the split iron core, which requires processing man-hours.
　また、ハシイタ３０、シメガネ４０による押さえが無いと、鉄心の開きが生じる。具体的には、図７（ａ）に示すように、鉄心を溶接する際には軸方向に圧力をかけているが、溶接後は圧力が抜け、図８に示すように、溶接部２１も冷めて矢印に示すように縮むことになる。しかも、分割鉄心のヨーク部２２は歯部２３に比べて厚みが薄い。そのため、図８に矢印で示すように、分割鉄心の剛性が足りないと歪により鉄心が開く（浮き上がる）ことになる。 In addition, if there is no holding by the hash resistor 30 and the shiglass 40, the iron core opens. Specifically, as shown in FIG. 7 (a), pressure is applied in the axial direction when the iron core is welded, but the pressure is released after welding, and as shown in FIG. It will cool and shrink as shown by the arrow. Moreover, the yoke portion 22 of the split iron core is thinner than the tooth portion 23. Therefore, as shown by arrows in FIG. 8, if the rigidity of the divided iron core is insufficient, the iron core opens (raises) due to distortion.
　また、図７（ｂ）に示すように、ヨーク部２２の厚みを歯部２３と同様に厚くして剛性を高めると溶接の歪を吸収することができる。溶接ではなく、ボルトで押える方法もあるが、その場合、ヨーク厚みが厚くないと鉄心の開きが生じる。 Further, as shown in FIG. 7B, welding distortion can be absorbed by increasing the rigidity of the yoke portion 22 in the same manner as the tooth portion 23 to increase the rigidity. There is a method of pressing with a bolt instead of welding, but in that case, if the yoke thickness is not thick, the iron core opens.
　上記課題を解決する本発明の請求項１に係る分割鉄心は、金属薄板を積層してなる円弧状の分割鉄心ブロックを円環状に連結すると共に厚さ方向に積み上げて構成される分割鉄心において、前記分割鉄心の外周面には溶接用溝が中心軸に沿って周方向等間隔に形成され、該溶接用溝には当該溶接溝の深さより薄い溶接板が溶接され、更に、厚さ方向に積み上げられる前記分割鉄心ブロックの周方向の位置は、前記溶接溝が周方向に形成される間隔毎にずらしていることを特徴とする。 The split core according to claim 1 of the present invention that solves the above problems is a split core that is formed by connecting arc-shaped split core blocks formed by laminating thin metal plates in an annular shape and stacking them in the thickness direction. On the outer peripheral surface of the divided core, welding grooves are formed at equal intervals in the circumferential direction along the central axis. A welding plate thinner than the depth of the welding groove is welded to the welding grooves, and further in the thickness direction. The positions in the circumferential direction of the divided core blocks that are stacked are shifted at every interval at which the weld grooves are formed in the circumferential direction.
　上記課題を解決する本発明の請求項２に係る分割鉄心は、請求項１記載の分割鉄心において、前記溶接溝は、前記溶接板と隙間なく密着することを特徴とする。 The split iron core according to claim 2 of the present invention for solving the above-mentioned problems is characterized in that in the split iron core according to claim 1, the weld groove is in close contact with the weld plate without a gap.
　上記課題を解決する本発明の請求項３に係る分割鉄心は、請求項１又は２記載の分割鉄心において、前記金属薄板はカシメ部にて結合されることを特徴とする。 A split iron core according to claim 3 of the present invention for solving the above-mentioned problems is characterized in that in the split iron core according to claim 1 or 2, the metal thin plates are joined at a caulking portion.
　上記課題を解決する本発明の請求項４に係る分割鉄心の製造方法は、金属薄板を積層して円弧状の分割鉄心ブロックを形成する工程と、前記鉄心ブロックを円環状に連結すると共に厚さ方向に積み上げる際、厚さ方向に積み上げられる前記分割鉄心ブロックの周方向の位置を、前記分割鉄心ブロックの外周面に中心軸に沿って周方向等間隔に形成される溶接溝の周方向の間隔毎にずらす工程と、前記溶接用溝に当該溶接溝の深さより薄い溶接板を溶接する工程とからなることを特徴とする。 The method of manufacturing a split core according to claim 4 of the present invention that solves the above-described problem includes a step of stacking metal thin plates to form an arc-shaped split core block, connecting the core blocks in an annular shape, and thickness. When stacking in the direction, the circumferential positions of the divided core blocks stacked in the thickness direction are the circumferential intervals of the weld grooves formed at equal intervals in the circumferential direction along the central axis on the outer peripheral surface of the divided core block. It is characterized by comprising a step of shifting each time and a step of welding a weld plate thinner than the depth of the welding groove to the welding groove.
　本発明の分割鉄心及びその製造方法によれば、背景技術の欄に記載した従来の方法に対して、金属薄板を積むのではなく、分割ブロックを積み上げるので工数が削減できる。しかも、金属薄板をカシメ部により結合して分割ブロックとするので、鉄心開きが無く、ハシイタ・シメガネが省略できる。更に、溶接溝の下面と溶接板が密着しているので、溶接箇所が冷えた際に発生する歪によるカシメの剥がれが無い。特に、フレームには溶接溝が無い面が当たることにより、ヤキバメが可能となる。 According to the split iron core and the method for manufacturing the same according to the present invention, the number of man-hours can be reduced since the split blocks are stacked instead of stacking the thin metal plates as compared with the conventional method described in the background art section. In addition, since the metal thin plates are joined by the caulking portion to form the divided blocks, there is no opening of the iron core, and the hash and the glasses can be omitted. Further, since the lower surface of the weld groove and the weld plate are in close contact with each other, there is no caulking off due to distortion generated when the welded portion is cooled. In particular, the frame can be frayed by hitting a surface without a weld groove.
本発明の一実施例に係る分割鉄心における分割鉄心ブロックの平面図である。It is a top view of the split iron core block in the split iron core which concerns on one Example of this invention. 本発明の一実施例に係る分割鉄心における分割鉄心ブロックの斜視図である。It is a perspective view of the split iron core block in the split iron core which concerns on one Example of this invention. 本発明の一実施例に係る分割鉄心の製造過程を示す斜視図である。It is a perspective view which shows the manufacture process of the split iron core which concerns on one Example of this invention. 図４（ａ）はヨーク部外周面に溶接板が溶接された様子を示す説明図、図４（ｂ）は溶接溝に溶接板が溶接された様子を示す説明図である。FIG. 4A is an explanatory view showing a state in which the weld plate is welded to the outer peripheral surface of the yoke portion, and FIG. 4B is an explanatory view showing a state in which the weld plate is welded to the weld groove. 従来の一般的な分割鉄心の製造方法の説明図である。It is explanatory drawing of the manufacturing method of the conventional common division | segmentation iron core. 図６（ａ）は分割コアにハシイタ及びシメガネが固定された様子を示す断面図、図６（ｂ）分割コアにハシイタ及びシメガネが固定された様子を示す斜視図である。FIG. 6A is a cross-sectional view illustrating a state in which the hash resistor and the glasses are fixed to the split core, and FIG. 6B is a perspective view illustrating a state in which the hash resistor and the glasses are fixed to the split core. 図７（ａ）はヨーク部の厚さの小さな鉄心の説明図、図７（ｂ）ヨーク部の厚さの大きな鉄心の説明図である。FIG. 7A is an explanatory diagram of an iron core having a small yoke portion thickness, and FIG. 7B is an explanatory diagram of an iron core having a large yoke portion thickness. 溶接部及び溶接部の縮みにより開いた鉄心を示す斜視図である。It is a perspective view which shows the iron core opened by shrinkage | contraction of the welding part and the welding part.
　以下、本発明を実施するための形態について、実施例に基づいて具体的に説明する。 Hereinafter, modes for carrying out the present invention will be specifically described based on examples.
　本発明の一実施例に係る分割鉄心を図１－図３を参照して説明する。
　図１は分割鉄心ブロックの平面図、図２は分割鉄心ブロックの斜視図、図３は分割鉄心の製造過程を示す斜視図である。 A split iron core according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a plan view of a split core block, FIG. 2 is a perspective view of the split core block, and FIG. 3 is a perspective view showing a manufacturing process of the split core.
　図１及び図２に示す通り、分割鉄心ブロック１は、電磁鋼板等の金属薄板を積層してなる円弧状のブロックであり、外周部であるヨーク部１ａと、内周部において溝部１ｃの間に周方向等間隔に形成される複数の歯部１ｂとから構成される。
　積層される金属薄板の厚さとしては、例えば、０．５ｍｍであり、積層される金属薄板の枚数は、例えば、１０枚から２０枚程度である。 As shown in FIGS. 1 and 2, the divided core block 1 is an arc-shaped block formed by laminating thin metal plates such as electromagnetic steel plates, and between the yoke portion 1 a that is an outer peripheral portion and the groove portion 1 c in the inner peripheral portion. And a plurality of teeth 1b formed at equal intervals in the circumferential direction.
The thickness of the laminated metal thin plates is, for example, 0.5 mm, and the number of laminated metal thin plates is, for example, about 10 to 20.
　分割鉄心ブロック１におけるヨーク部１ａには周方向等間隔に３個のカシメ部２が形成され、その歯部１ｂにはそれぞれカシメ部２が形成され、これらのカシメ部２を位置合わせして金属薄板を結合することにより、分割鉄心ブロック１が組み立てられる。なお、カシメ部２とは、プレス成型により形成される凹部と凸部のことである。 Three caulking portions 2 are formed at equal intervals in the circumferential direction on the yoke portion 1a in the divided core block 1, and caulking portions 2 are formed on the tooth portions 1b, respectively. The split iron core block 1 is assembled by joining thin plates. The crimped portion 2 is a concave portion and a convex portion formed by press molding.
　分割鉄心ブロック１における外周部であるヨーク部１ａの外周面には、溶接用溝１ｄが軸方向に沿って周方向等間隔に形成されている。軸方向とは、分割鉄心ブロック1が円環状（リング状）に連結されて構成された分割鉄心、つまり、完成された分割鉄心の中心軸の方向のことである。溶接用溝１ｄの底面は、上記中心軸に対する径方向（図中一点鎖線で示す）の仮想線に対して直角な平面（図１中において、垂直を示す記号に対して直角な直線）となっている。 On the outer peripheral surface of the yoke portion 1a which is the outer peripheral portion of the divided core block 1, welding grooves 1d are formed at equal intervals in the circumferential direction along the axial direction. The axial direction is a divided iron core formed by connecting the divided iron core blocks 1 in an annular shape (ring shape), that is, the direction of the central axis of the completed divided iron core. The bottom surface of the welding groove 1d is a plane perpendicular to the imaginary line in the radial direction (indicated by the alternate long and short dash line in the figure) with respect to the central axis (a straight line perpendicular to the vertical symbol in FIG. 1). ing.
　本実施例においては、分割鉄心ブロック１の両端には半幅の溶接用溝１ｄが配置されると共にその間には二つの溶接用溝１ｄが配置されている。
　各溶接用溝１ｄには、溶接用溝１ｄの深さより薄い溶接板３がそれぞれ溶接されている。溶接板３は、長方形断面を有する平板である。
　そのため、溶接用溝１ｄに溶接された溶接板３の高さは、各溶接用溝１ｄの間に位置する外周面よりも低くなっている。従って、フレーム（図示省略）には、各溶接用溝１ｄの間に位置する外周面が接触することになる。つまり、フレームには溶接溝１ｄがない面が当たることになる。 In the present embodiment, a half-width welding groove 1d is disposed at both ends of the divided core block 1, and two welding grooves 1d are disposed therebetween.
A welding plate 3 thinner than the depth of the welding groove 1d is welded to each welding groove 1d. The welding plate 3 is a flat plate having a rectangular cross section.
Therefore, the height of the weld plate 3 welded to the welding groove 1d is lower than the outer peripheral surface located between the welding grooves 1d. Therefore, the outer peripheral surface located between the welding grooves 1d comes into contact with the frame (not shown). That is, the surface without the welding groove 1d hits the frame.
　上述した通り、溶接用溝１ｄの底面は、上記中心軸に対する径方向の仮想線に対して直角な平面であり、溶接板３は長方形断面を有する平板であるため、溶接用溝１ｄの底面に溶接板３が密着することになる。
　仮に、図４（ａ）に示すように、ヨーク部１ａの外周面に溶接板３を溶接すると、ヨーク部１ａの外周面との隙間を埋めるために溶接部３ａが厚くなり、縮み代も大きくなる。そのため、図中矢印で示す応力に引っ張られて開く（剥がれる）恐れがあった。
　これに対し、本実施例では、図４（ｂ）に示す通り、溶接用溝１ｄの底面に溶接板３が密着するため、溶接板３の両側に位置する溶接部３ａは比較的厚みが小さく、応力が少ないという利点がある。 As described above, the bottom surface of the welding groove 1d is a plane perpendicular to the radial imaginary line with respect to the central axis, and the welding plate 3 is a flat plate having a rectangular cross section. The weld plate 3 comes into close contact.
As shown in FIG. 4A, when the welding plate 3 is welded to the outer peripheral surface of the yoke portion 1a, the welded portion 3a is thickened to fill the gap with the outer peripheral surface of the yoke portion 1a, and the shrinkage is large. Become. Therefore, there was a risk of opening (peeling) by being pulled by the stress indicated by the arrow in the figure.
On the other hand, in this embodiment, as shown in FIG. 4B, the weld plate 3 is in close contact with the bottom surface of the welding groove 1d, so that the welded portions 3a located on both sides of the weld plate 3 have a relatively small thickness. There is an advantage that the stress is small.
　以下、本発明の一実施例に係る分割鉄心の製造方法について説明する。
　先ず、分割鉄心ブロック１は順送カシメにより、５～１０ｍｍ厚さの円弧状のブロックに整形する。ここで、順送カシメとは、順送り金型を用い、カシメにより電磁鋼板等の金属薄板を１枚１枚固定することを言う。
　次に、分割鉄心ブロック１は、図３に示すように、円柱状のガイド４に沿わせて、溶接溝１ｄが周方向に形成される間隔（以下、溶接溝ピッチという）θ毎にずらして円環状に並べられると共に厚さ方向にも積み重ねて分割鉄心とする。 Hereinafter, the manufacturing method of the split iron core which concerns on one Example of this invention is demonstrated.
First, the divided core block 1 is shaped into an arc-shaped block having a thickness of 5 to 10 mm by progressive caulking. Here, progressive caulking refers to fixing a metal thin plate such as an electromagnetic steel sheet one by one using a progressive die.
Next, as shown in FIG. 3, the split core block 1 is shifted along the cylindrical guide 4 at intervals (hereinafter referred to as weld groove pitch) θ in which the weld grooves 1d are formed in the circumferential direction. Arranged in an annular shape and stacked in the thickness direction to form a split iron core.
　従って、厚さ方向に積み上げられる第１段目における分割鉄心ブロック１の円環状に連結される位置Ａは、第２段目における分割鉄心ブロック１の円環状に連結される位置とは周方向に溶接溝ピッチθだけずれることになり、第３段目も同様に周方向に更に溶接溝ピッチθだけずれることになる。
　ここで、分割鉄心ブロック１は溶接溝ピッチθの３倍の大きさであるので、第４段目における分割鉄心ブロック１の円環状に連結される位置Ａと第１段目における分割鉄心ブロック１の円環状に連結される位置Ａとは上下方向で一致することになる。 Therefore, the position A of the divided core block 1 that is stacked in the first stage in the thickness direction is connected to the annular position of the divided core block 1 in the second stage in the circumferential direction. The welding groove pitch θ is shifted, and the third stage is similarly shifted further in the circumferential direction by the welding groove pitch θ.
Here, since the split core block 1 is three times larger than the welding groove pitch θ, the split core block 1 in the first stage and the position A connected to the annular shape of the split core block 1 in the fourth stage. The position A connected in an annular shape coincides with the vertical direction.
　引き続き、分割鉄心の溶接溝１ｄに溶接板３を溶接する。溶接方法は従来どおりであるが、溶接溝１ｄは溶接板３の厚よりも深いので、フレームには溶接溝１ｄが無い面が当たることになる。 Subsequently, the weld plate 3 is welded to the weld groove 1d of the split iron core. Although the welding method is the same as the conventional method, the weld groove 1d is deeper than the thickness of the weld plate 3, so that the surface without the weld groove 1d hits the frame.
　このように説明した通り、本実施例の分割鉄心及びその製造方法によれば、背景技術の欄に記載した従来の方法に対して、金属薄板を積むのではなく、分割ブロック１を積み上げるので工数が削減できる。しかも、金属薄板を順送カシメにより結合して分割ブロック１とするので、鉄心開きが無く、ハシイタ・シメガネが省略できる。更に、溶接溝１ｄの下面と溶接板３が密着しているので、溶接箇所が冷えた際に発生する歪によるカシメの剥がれが無い。特に、フレームには溶接溝１ｄが無い面が当たることにより、ヤキバメが可能となる。 As described above, according to the split iron core and the manufacturing method thereof according to the present embodiment, since the split blocks 1 are stacked instead of stacking the thin metal plates, the man-hours are increased. Can be reduced. In addition, since the metal thin plates are joined by progressive caulking to form the divided block 1, there is no opening of the iron core, and it is possible to omit the hash and the glasses. Further, since the lower surface of the weld groove 1d and the weld plate 3 are in close contact, there is no staking peeling due to distortion that occurs when the welded portion is cooled. In particular, when the surface without the weld groove 1d hits the frame, it can be frayed.
　本発明は、分割鉄心及びその製造方法として広く産業上利用可能なものである。 The present invention is widely applicable industrially as a split iron core and a manufacturing method thereof.
１　分割鉄心ブロック
１ａ　ヨーク部
１ｂ　歯部
１ｃ　溝部
２　カシメ部
３　溶接板
４　ガイド 1 Divided Iron Core Block 1a Yoke 1b Tooth 1c Groove 2 Caulking 3 Welding Plate 4 Guide

Claims (4)

  1. 金属薄板を積層してなる円弧状の分割鉄心ブロックを円環状に連結すると共に厚さ方向に積み上げて構成される分割鉄心において、前記分割鉄心の外周面には溶接用溝が中心軸に沿って周方向等間隔に形成され、該溶接用溝には当該溶接溝の深さより薄い溶接板が溶接され、更に、厚さ方向に積み上げられる前記分割鉄心ブロックの周方向の位置は、前記溶接溝が周方向に形成される間隔毎にずらしていることを特徴とする分割鉄心。 In a split core constructed by connecting arc-shaped split core blocks formed by laminating thin metal plates in an annular shape and stacked in the thickness direction, a welding groove is formed along the central axis on the outer peripheral surface of the split core. The welding groove is welded with a welding plate thinner than the depth of the welding groove, and the circumferential position of the divided core block stacked in the thickness direction is determined by the welding groove. A split iron core characterized by being shifted at intervals formed in the circumferential direction.
  2. 前記溶接溝は、前記溶接板と隙間なく密着することを特徴とする請求項１記載の分割鉄心。 The split iron core according to claim 1, wherein the weld groove is in close contact with the weld plate without a gap.
  3. 前記金属薄板はカシメ部にて結合されることを特徴とする請求項１又は２記載の分割鉄心。 The split iron core according to claim 1, wherein the metal thin plates are joined at a caulking portion.
  4. 金属薄板を積層して円弧状の分割鉄心ブロックを形成する工程と、前記鉄心ブロックを円環状に連結すると共に厚さ方向に積み上げる際、厚さ方向に積み上げられる前記分割鉄心ブロックの周方向の位置を、前記分割鉄心ブロックの外周面に中心軸に沿って周方向等間隔に形成される溶接溝の周方向の間隔毎にずらす工程と、前記溶接用溝に当該溶接溝の深さより薄い溶接板を溶接する工程とからなることを特徴とする分割鉄心の製造方法。 Laminating metal thin plates to form an arc-shaped split core block, and connecting the core blocks in an annular shape and stacking them in the thickness direction, the circumferential positions of the split core blocks stacked in the thickness direction For each circumferential interval of welding grooves formed at equal circumferential intervals along the central axis on the outer peripheral surface of the divided core block, and a welding plate thinner than the depth of the welding groove in the welding groove A method of manufacturing a split iron core comprising the steps of welding
PCT/JP2011/074477 2010-10-28 2011-10-25 Divided iron core and manufacturing method therefor WO2012057100A1 (en)

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JP6092010B2 (en) * 2013-06-12 2017-03-08 株式会社三井ハイテック Manufacturing method of stator core
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JP2019103219A (en) * 2017-11-30 2019-06-24 三菱電機株式会社 Electric rotary machine and method of manufacturing the same
JP2019187056A (en) * 2018-04-09 2019-10-24 三菱電機株式会社 Core of rotary electric machine, and method of manufacturing core of rotary electric mashine
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