JPS60160352A - Manufacture of stator for rotary electric machine - Google Patents

Abstract

PURPOSE:To have no need of cutting operations by fixing a pole core into a yoke availing a tapered and deformed hole made after rounding process of materials. CONSTITUTION:Plural holes 5 are processed by die press simultaneously to be fit to the fixing positions for each pole core 6. The material is rounding-processed in a cylindrical form, and the hole 5 is tapered. Availing the tapered and deformed hole 5, a field winding 4 is inserted into the boss 6a of the pole core 6, a projection 6b for fastening the boss 6a is inserted into the hole 5 and is fastened and fit to the tapered hole 5, and thus, the pole core 6 and the field winding 4 are fixed inside a yoke 1 without being taken out. The pole core 6 after being fastened can be fixed securely into the yoke 1 due to the tapered hole 5.

Description

【発明の詳細な説明】 （産業上の利用分野） （１） 本発明は電動機１発電機等の回転電機の固定子の製造方
法に関し、特に継鉄に対するボールコアの固定法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) (1) The present invention relates to a method for manufacturing a stator for a rotating electric machine such as a motor/generator, and particularly to a method for fixing a ball core to a yoke.

（従来技術） 従来、継鉄にボールコアを固定する方法として、。(Conventional technology) Conventionally, as a method of fixing a ball core to a yoke.

スクリューによる方法や絞めによる方法を用いていたが
、どちらの場合も継鉄にボールコアを取付けるための切
削穴加工をすることが必要であった。A screw method and a choke method were used, but in both cases it was necessary to cut a hole to attach the ball core to the yoke.

例えば、絞めによる方法では冷鍛等で製作されたボール
コアのボス部を継鉄に通す為、筒状のヨーク表面に穴を
あけ、かつボールコアを絞め時に固定する為のテーパ状
あるいは段付の穴加工を行なっていた。従って、加工が
複雑で生産性が悪いという欠点がある。For example, in the tightening method, in order to pass the boss part of the ball core made by cold forging etc. through the yoke, a hole is made on the surface of the cylindrical yoke, and a tapered or stepped hole is formed to fix the ball core during tightening. The holes were being machined. Therefore, there are disadvantages in that processing is complicated and productivity is poor.

（発明の目的） 本発明は上記の欠点を解消するため、継鉄の丸め加工前
の素材の段階にてボールコア固定用穴を素材に予めプレ
ス加工し、素材の丸め加工後の穴のテーパ状変形を利用
してボールコアを継鉄に固定することにより、加工が容
易で生産性を大幅に（２） 向上することを目的とする。(Object of the Invention) In order to solve the above-mentioned drawbacks, the present invention has been developed by press-forming a ball core fixing hole into the material before rounding the yoke, so that the taper of the hole after the rounding of the material is reduced. By fixing the ball core to the yoke using shape deformation, the purpose is to facilitate machining and significantly improve productivity (2).

（実施例） 以下本発明を図に示す実施例について説明する。(Example) The present invention will be described below with reference to embodiments shown in the drawings.

第１図および第２図において、■は機関始動用電動機の
継鉄素材で、所定寸法の長方形状に切断されており、か
つその中間部分には所定間隔でボールコア固定用穴５が
打ち抜き形成されている。１′は素材１を丸め加工して
筒状に形成した継鉄、４は界磁巻線である。６はボール
コアで、界磁巻線４が外周に装着されるボス６ａと、ボ
ス６ａの外周側端部に径方向に向かって突出形成されて
いて継鉄ｌ′の穴５に嵌合する絞め用突起６ｂと、ボス
６ａの内周端に円周方向に向かって円弧状に突出形成さ
れたポールピース６ｃと、絞め用突起６ｂの外端面に形
成された絞め部６ｄとを有している。In Figures 1 and 2, ■ is a yoke material for an engine starting motor, which is cut into a rectangular shape with predetermined dimensions, and holes 5 for fixing ball cores are punched out at predetermined intervals in the middle of the rectangular shape. has been done. 1' is a yoke formed into a cylindrical shape by rolling the material 1, and 4 is a field winding. Reference numeral 6 denotes a ball core, which includes a boss 6a on which the field winding 4 is attached, and a ball core formed protruding in the radial direction at the outer peripheral end of the boss 6a, which fits into the hole 5 of the yoke l'. It has a constriction protrusion 6b, a pole piece 6c formed to protrude in an arc shape toward the circumference from the inner peripheral end of the boss 6a, and a constriction part 6d formed on the outer end surface of the constriction protrusion 6b. There is.

次に、上記構成においてその製造方法を説明する。継鉄
素材１が板状に切断加工される際、第２図（ａｌに示す
ごとく５なる穴を各ボールコア６の固定位置に合わせて
複数個同時にプレスにより打ち（３） 抜き加工する。これは例えば、長大、四角の形状いずれ
にても可である。この素材１は第２図（ｂｌに示すごと
く円筒状に丸め加工され、電動機の継鉄ｌ′とされるが
、この際、素材１から丸められる時の素材ｌの変形によ
り、穴５の外周側の円周方向寸法は第２図（ｂｌの矢印
イで示すごとく広がり、内周側の円周方向寸法は第２図
Ｔｂｌの矢印口で示すごとく縮み、丸め加工後テーパ状
の穴となる。これは素材１の丸め加工時自然になるもの
である。Next, a method of manufacturing the above structure will be explained. When the yoke material 1 is cut into a plate shape, a plurality of holes (5) are simultaneously punched using a press (3) in alignment with the fixing position of each ball core 6 as shown in FIG. 2 (al). For example, the material 1 can be long or square in shape.This material 1 is rolled into a cylindrical shape as shown in Figure 2 (bl) and used as a yoke l' for an electric motor. Due to the deformation of the material 1 when it is rolled up from 1, the circumferential dimension on the outer circumferential side of the hole 5 expands as shown by arrow A in Fig. 2 (bl), and the circumferential direction dimension on the inner circumferential side expands as shown in Fig. 2 Tbl. As shown by the arrow, it shrinks and becomes a tapered hole after being rounded.This is something that occurs naturally when the material 1 is rounded.

この穴５のテーパ形状の変形を利用し、界磁巻線４をボ
ールコア６のボス６ａに挿入し、ボス６ａの絞め用突起
６ｂを穴５に挿入し、この突起６ｂを絞めてテーパ穴５
になられせることによりボールコア６および界磁巻線４
を継鉄１′の内周に固定する。このテーパ穴５により、
絞め後のボールコア６は、ぬけず確実に継鉄１′に固定
することができる。ここで、素材１の板厚が大の場合は
ど内外周の変形差も大きくなり、より確実な固定ができ
る。Utilizing the deformation of the tapered shape of the hole 5, the field winding 4 is inserted into the boss 6a of the ball core 6, the constricting protrusion 6b of the boss 6a is inserted into the hole 5, and this protrusion 6b is constricted to make the taper hole. 5
By bending the ball core 6 and the field winding 4
is fixed to the inner circumference of the yoke 1'. This tapered hole 5 allows
The ball core 6 after tightening can be reliably fixed to the yoke 1' without slipping out. Here, if the thickness of the material 1 is large, the difference in deformation between the inner and outer circumferences will be larger, allowing for more reliable fixing.

なお、本実施例は四角形状の穴について図示しく４） であるが、長大、丸穴にても同様の効果が得られる。In this example, a rectangular hole is illustrated.4) However, the same effect can be obtained with long and round holes.

また、冷鍛打ち抜き時のだれを利用することにより、よ
り大きなテーパも得られる。即ち、穴５をプレスにより
冷鍛打ち抜き加工する際、穴５の周縁に素材ｌのだれが
生じて、第３図に示すごとく、穴５は若干の傾斜角θを
持ったテーパ状となる。そこで、この穴５の小径側の面
（第３図の下面）が内周側となるように素材１を丸め加
工することにより、この丸め加工時の素材１の変形によ
ってミ丸め加工後の穴５を、傾斜角θのより大きなテー
パ穴とすることができ、より確実なボールコア６の固定
ができる。また、プレス打ち抜き型として、テーパ穴が
積極的に形成されるようなものを用いるようにしてもよ
い。Furthermore, a larger taper can be obtained by utilizing the droop during cold forging punching. That is, when the hole 5 is cold-forged punched by a press, the material 1 sags around the periphery of the hole 5, and the hole 5 becomes tapered with a slight inclination angle θ, as shown in FIG. Therefore, by rounding the material 1 so that the surface on the small diameter side of the hole 5 (lower surface in Fig. 3) becomes the inner circumferential side, the deformation of the material 1 during this rounding will cause the hole after rounding to be 5 can be made into a tapered hole with a larger inclination angle θ, and the ball core 6 can be fixed more reliably. Furthermore, a press punching die in which a tapered hole is positively formed may be used.

また、上述した実施例においては、素材１の所定形状へ
の切断時に穴５を同時に加工するようにしたが、所定形
状に予め切断されている素材１に穴５をプレス加工する
ようにしてもよい。また、界磁巻線４は、ボールコア６
を継鉄１′に固定しく５） た後、ボールコア６に直巻きするようにしてもよい。Further, in the above-described embodiment, the holes 5 are machined simultaneously when cutting the material 1 into a predetermined shape, but the holes 5 may also be formed by press-machining the material 1 that has been cut into a predetermined shape in advance. good. Further, the field winding 4 is connected to the ball core 6
After fixing 5) to the yoke 1', it may be directly wound around the ball core 6.

また、本発明は電動機に限らず、ボールコアを継鉄に固
定する構造の回転電機であれば、発電機等の他のものに
も適用可能である。Further, the present invention is not limited to electric motors, but can be applied to other rotating electric machines such as generators as long as the ball core is fixed to a yoke.

また、ボールコアの固定をビス締めで行なうものにも本
発明を適用できる。この場合、穴５はビスの円錐台状頭
部が収納されることになる。Further, the present invention can also be applied to a device in which the ball core is fixed by screw tightening. In this case, the hole 5 accommodates the truncated conical head of the screw.

（発明の効果） 以上述べたように本発明においては、継鉄の丸め加工前
の素材の段階にてボールコア固定用穴を素材に予めプレ
ス加工し、素材の丸め加工後の穴のテーパ状変形を利用
してボールコアを継鉄に固定するから、切削加工が不要
で工数低減ができ、加工が容易で生産性を大幅に向上す
ることができるという優れた効果がある。(Effects of the Invention) As described above, in the present invention, a ball core fixing hole is pre-pressed into the material before the rounding of the yoke, and the hole is tapered after the material is rounded. Since the ball core is fixed to the yoke using deformation, there is no need for cutting, reducing the number of man-hours, making the process easy, and greatly improving productivity.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明固定子の一実施例を示す正面図、第２図
（ａｌ〜（ｄ）は第１図図示固定子の製造工程を順次示
す斜視図および要部横断面図、第３図は第２（６） 図（ａ）図示のＡ−Ａ線に沿う縦断面図である。 １・・・継鉄素材、１′・・・継鉄、５・・・ボールコ
ア固定用穴、６・・・ボールコア。 代理人弁理士　岡　部　隆 （７）FIG. 1 is a front view showing one embodiment of the stator of the present invention, FIGS. 2 (al to d) are perspective views and cross-sectional views of essential parts sequentially showing the manufacturing process of the stator shown in FIG. The figure is a longitudinal sectional view taken along the line A-A in Figure 2 (6) (a). 1...Yoke material, 1'...Yoke, 5...Ball core fixing hole , 6...Ball Core. Attorney Takashi Okabe (7)

Claims (1)

【特許請求の範囲】 （１１平板状素材の丸め加工により筒状の継鉄を構成す
る回転電機用固定子において、前記継鉄の丸め加工前の
素材の段階にてポールコア固定用穴をこの素材に予めプ
レス加工し、前記素材を丸め加工後前記穴のテーパ状変
形を利用して前記ボールコアを前記継鉄に固定する回転
電機用固定子の製造方法。 （２）前記素材の丸め加工は、前記穴のプレス加工時に
生ずる前記欠周縁の素材だれによる径小側の面を内周側
としてなされる特許請求の範囲第１項記載の回転電機用
固定子の製造方法。 （３）前記穴のプレス加工は前記素材の平板状への切断
時に同時になされる特許請求の範囲第１項又は第２項記
載の回転電機用固定子の製造方法。[Scope of Claims] (11) In a stator for a rotating electric machine in which a cylindrical yoke is formed by rounding a flat plate-like material, a pole core fixing hole is formed in the material before the yoke is rounded. A method for manufacturing a stator for a rotating electric machine, in which the ball core is fixed to the yoke using the tapered deformation of the hole after the material is pressed in advance and the material is rolled. The method for manufacturing a stator for a rotating electric machine according to claim 1, wherein the surface of the small diameter side due to material sagging of the notch edge that occurs during press working of the hole is the inner peripheral side. (3) The hole 3. The method for manufacturing a stator for a rotating electric machine according to claim 1, wherein the pressing is performed simultaneously when cutting the material into a flat plate shape.