JPS61177142A - Manufacture of armature of flat motor - Google Patents

Manufacture of armature of flat motor

Info

Publication number
JPS61177142A
JPS61177142A JP1778485A JP1778485A JPS61177142A JP S61177142 A JPS61177142 A JP S61177142A JP 1778485 A JP1778485 A JP 1778485A JP 1778485 A JP1778485 A JP 1778485A JP S61177142 A JPS61177142 A JP S61177142A
Authority
JP
Japan
Prior art keywords
coil
commutator
base
coils
manufacturing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1778485A
Other languages
Japanese (ja)
Inventor
Koichi Ito
伊藤　光市
Riyuusuke Anshita
庵下　隆介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1778485A priority Critical patent/JPS61177142A/en
Publication of JPS61177142A publication Critical patent/JPS61177142A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • 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
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

PURPOSE:To reduce the number of steps by connecting a plurality of unit coils positioned by supporting pins in a circumferential direction on a coil supporting base with commutator segments, and then filling and curing resin as part of molding die with the base. CONSTITUTION:A coil supporting base 13 having a recess at the center is rotatably supported to a substrate 12 to form a jig 11. The base 13 has a positioning pin P of a unit coil 4 on the circumference near the outer periphery, and a plurality of unit coils 4 disposed. A rotational shaft 15 is inserted to the recess of the base 13 in a commutator 5, and the segment 5a and the coils 4 are soldered. Then, an upper die 22 is contacted with a lower die assembly 21 of the jig 11, resin is filled from a hole 22a, cured, and a rotor is removed. The hole of the pin P remains in the rotor, but is used as a rotary balance regulator. Thus, the manufacturing steps can be simplified to reduce the manufacturing cost.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フラットモートルのアマチュア製造方法の
改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in an amateur manufacturing method for a flat motor.

〔従来の技術〕[Conventional technology]

第５図乃至第１０図は実開昭５８−１４５０８号公報に
示された従来のフラットモートルのアマチュア（無鉄心
電機子）及びその製造方法を示す図であり、要約して説
明すると、第５図は所定形状に形成された単コイル（４
）の平面図であって、整流子（後述）の整流子片に電気
的に接続される接続用日出線（ＩＬ）が導出される。第
４Ｘ図は・イル整列治具上に外周部と内周部に埋設され
た支持ピン（ｋ′）により位置決めされて整流子（５１
の周りに偏平状に配列された多数の単コイル（４）の正
面図であり、単コイル（４）を配列すると同時に整流子
片（５ａ）と口出線（匂とが互いに電気的に接続される
。次いで、各単コイル（４）は溶剤の付着若しくは局部
的加熱によりお互いに接着されて、第７図の正面図に示
す仮固着コイル−が得られる。次に、第８図に示す如く
仮固着コイル麹をピンＰ、が植設されたモールド下金型
（７）上に載置し、更に、下金型（７）上に上金型（６
）を載置してモールド樹脂を注型、硬化させることＥζ
より第９図及び第１０図に示す無鉄心電機子（９）が得
られる。5 to 10 are diagrams showing a conventional flat motor armature (iron core armature) and its manufacturing method disclosed in Utility Model Application Publication No. 58-14508. The figure shows a single coil (4
), in which a connecting sun wire (IL) electrically connected to a commutator piece of a commutator (described later) is led out. Figure 4X shows the commutator (51
It is a front view of a large number of single coils (4) arranged in a flat shape around Next, each single coil (4) is bonded to each other by adhesion of a solvent or local heating to obtain a temporarily fixed coil shown in the front view of FIG. Place the temporarily fixed coil koji on the lower mold (7) in which the pin P is implanted, and then place the upper mold (6) on the lower mold (7).
) to cast and harden the mold resin.Eζ
As a result, a coreless armature (9) shown in FIGS. 9 and 10 is obtained.

〔発明が解決しようとする問題点〕 以上のように、従来のフラットモートルのアマチュアの
製造装置では、仮着コイル輪を製造する工程で使用する
治具には単コイル（４）と整流子片（５ａ）との電気的
接続を容易にするための工夫がなされておらず、上記治
具に単コイル（４）を配列する毎に整流子片（５ａ）に
接続しなければならないため、全部の接続作業を完了す
るまでに長い時間を要するという問題点があった。また
、仮固着コイル帥を製造する製造工程と樹脂モールド工
程とでそれぞれ治工具を変更しているため、モールド成
形時にに装着する作業が必要であって、単コイル（４）
が虫んだり口出線（ト）が傷んだり、また仮固着コイル
に）全体が歪んだりするという問題点があった。更に、
単コイル（４）の出みや、口出線（目の傷み、あるいは
、仮固着コイル−全体の侑みを防止するために、仮固着
コイルに）を製造する際に溶剤を付着させたり局部的に
加熱して互いに固着しなければならないという間細点が
あった。[Problems to be Solved by the Invention] As described above, in the conventional flat motor armature manufacturing equipment, the jig used in the process of manufacturing the temporary coil ring has a single coil (4) and a commutator piece. (5a), and every time a single coil (4) is arranged in the jig, it must be connected to the commutator piece (5a), so all There was a problem in that it took a long time to complete the connection work. In addition, since the jigs and tools are changed between the manufacturing process for manufacturing the temporary fixed coil and the resin molding process, it is necessary to attach the single coil (4) during molding.
There were problems in that the lead wire (G) could be damaged, and the entire temporarily fixed coil could become distorted. Furthermore,
Protrusion of the single coil (4) and lead wire (to prevent damage to the eyes or the temporary fixed coil - to prevent the overall appearance of the temporarily fixed coil), when manufacturing the temporary fixed coil, do not apply solvent or locally. The problem was that they had to be heated to make them stick together.

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、作業工程が簡略化されると共に、単コイルと
整流子片との電気接続を容易にし、単コイルの日出線が
傷んだり、コイル全体が歪んだすするのを防止して組上
り精度を高める事の可能なフラットモートルのアマチュ
ア整遣方法を得ることを目的とする。This invention was made to solve the above-mentioned problems, and it not only simplifies the work process, but also facilitates the electrical connection between the single coil and the commutator piece, and prevents damage to the single coil Hiji wire. To provide an amateur maintenance method for a flat motor capable of improving assembly accuracy by preventing the entire coil from becoming distorted or leaking.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係るフラットモートルのアマチュア製造方法
は、中心部に凹溝を有する基盤と、この基盤上に回動支
持され、中央に上記凹溝蕾こ対応する貫通孔を有し、周
辺部に複数のコイル支持ピンを有したコイル支持台とを
備え、少なくとも上記コイル支持台を、複数の単コイル
と整流子の載置、整流子と単コイルの電気的接続、およ
びモールド成形の各工程に共用したものである。The amateur manufacturing method for a flat motor according to the present invention includes a base having a groove in the center, a base rotatably supported on the base, a through hole in the center corresponding to the groove bud, and a plurality of holes in the periphery. and a coil support stand having coil support pins, and at least the coil support stand is used in common for each process of mounting a plurality of single coils and a commutator, electrically connecting the commutators and single coils, and molding. This is what I did.

〔作用〕[Effect]

この発明においては、コイル支持台上に複数の単コイル
を円周方向に支持ピンにより位置決めして偏平状に配設
し、単コイルと整流子の整流子片とを電気的に接続した
後、上記コイル支持台をモールド型の一部としてモール
ド樹脂を注型、硬化させて上記複数の単コイルを一体化
することができるので、複数の単コイルを配列する工程
と仮固着コイルの製造工程と樹脂モールド工程とを同一
の治具を用いて行なうことができ、仮固着コイル製造時
に浴剤を使用したり、加熱したりする必要がなくなりま
た、製造工程の途中で加工品の脱着工程がなくなる。In this invention, a plurality of single coils are positioned in the circumferential direction using support pins and arranged in a flat shape on a coil support base, and after electrically connecting the single coils and the commutator pieces of the commutator, Since the plurality of single coils can be integrated by using the coil support as part of the mold and molding resin is cast and cured, the process of arranging the plurality of single coils and the manufacturing process of temporarily fixed coils can be performed. The same jig can be used for the resin molding process, eliminating the need to use bath additives or heating when manufacturing temporary fixed coils, and eliminating the need to attach and detach processed products during the manufacturing process. .

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を第１図乃至第４図に従って
説明する。同一符号は上述の従来装置と同様物を示すも
ので、まず第１図および第２図に於て、（ロ）は治具で
あって基盤（ロ）とこの！ｆｆ１（２）に回動可能に支
持されるコイル支持台（至）とで構成され基盤の凹溝（
１２ａ）に対応する貫通孔（１８ｂ）が設けられている
。α→は電気抵抗溶接装置であって、電源装置Ｑηと２
つの電極棒（至）、α呻とで構成されている。An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The same reference numerals indicate the same parts as the conventional device described above. First, in FIGS. 1 and 2, (B) is a jig, and the base (B) and this! It consists of a coil support stand (to) which is rotatably supported by ff1 (2), and a concave groove (to) on the base.
A through hole (18b) corresponding to 12a) is provided. α→ is an electric resistance welding device, and the power supply device Qη and 2
It consists of two electrode rods (to) and one electrode.

まず、第１図に示すように第５図と同様の単コイル（４
）がコイル支持ピンＰによって位置決めされてコイル支
持台μｓに形成された円盤状の凹溝（ｌ５ａ）上に整列
載置される。次に第２図に示すように回転軸ａＱに圧入
固着された整流子（６）がコイル支持台Ｑの貫通孔（１
３ｂ）と基盤０（２）の凹Ｆｓ（１２ａ）に挿入装着さ
れる。なお整流子（５）の凹溝（１２ａ）・貫通孔抵抗
浴接装置α・の一方の電極棒（至）を単一コイル（４）
の日出線りと整流子の整流子片（５ａ）とが接続される
位置に配置し、他方の電極棒ａ９を基盤（２）の切欠部
０４を介して整流子の整流子片（５ａ）の下部に接触位
置させる。そしてコイル支持合口をモータなどで回動さ
せながら電気抵抗溶接装置αＱによってコイルの口出線
りと整流子（５）の整流子片（５ａ）とを順次電気的機
械的に接続し、仮固着コイル−を得る。First, as shown in Fig. 1, a single coil (4
) are positioned by the coil support pin P and aligned and placed on the disc-shaped groove (l5a) formed in the coil support stand μs. Next, as shown in FIG.
3b) and the concave Fs (12a) of the base plate 0 (2). In addition, one electrode rod (to) of the concave groove (12a) of the commutator (5) and the through-hole resistance bath contacting device α is connected to the single coil (4).
Place the electrode bar a9 at a position where the commutator bar (5a) of the commutator is connected to the commutator bar (5a) of the commutator through the notch 04 of the base (2). ). Then, while rotating the coil support abutment with a motor or the like, the lead wire of the coil and the commutator piece (5a) of the commutator (5) are sequentially electrically and mechanically connected using an electric resistance welding device αQ, and temporarily fixed. Obtain a coil.

第２図の溶接工程の後、コイル支持台□□□上に仮固着
コイル■を載置した状態で、基盤（２）からコイル支持
台（至）をはずし、第８図に示すように成型金型のベー
ス四の凹溝（２０ａ）に挿入装着する。After the welding process shown in Figure 2, with the temporarily fixed coil ■ placed on the coil support □□□, the coil support (to) is removed from the base (2) and molded as shown in Figure 8. Insert it into the concave groove (20a) in the base 4 of the mold.

こうして樹脂モールド時の下型アセンブリ？υが構成さ
れている。そして、上型（２）が図示の如く上方から装
着（型締め）され、樹脂注入穴（２２ａ）から円盤型の
凹溝（ｉｓａ）と、上型（２）の凹溝（２２ａ）との間
で構成される空間に成型用樹脂が注入、硬化され、第４
図に示す電機子組立体（２）が得られる。Is this the lower mold assembly during resin molding? υ is constructed. Then, the upper mold (2) is attached (mold clamped) from above as shown in the figure, and the resin injection hole (22a) connects the disc-shaped groove (ISA) with the groove (22a) of the upper mold (2). Molding resin is injected and hardened into the space formed between
The armature assembly (2) shown in the figure is obtained.

（ｆ’ｔｏ）は樹脂モールド時、外周部のピン（ｋ″）
によって形成される***であって、回転のバランスを調
整する小片が***ＣＰｌｏ）の必要ケ所に埋設固着され
て電機子のバランスが取られる。なお、（財）はシール
ゴムであって耐熱性ゴムリングで構成され、金型の型締
機能を高めている。また、電機子組立体□□□は上述の
後、若干の後加工（整流子外周精密加工）がなされ、製
品が完成する。(f'to) is the pin (k'') on the outer periphery when resin molding
The armature is balanced by embedding and fixing small pieces for adjusting the balance of rotation in the necessary places in the small hole CPlo). The seal rubber is composed of a heat-resistant rubber ring that enhances the mold clamping function. Further, after the above-mentioned armature assembly □□□, some post-processing (commutator outer periphery precision processing) is performed to complete the product.

なお、上述では、コイル支持台μｓを成型金型の一部と
して構成したが、治具αυで下型を一体構成しても良い
。さらに、シールゴムの装着は治Ａ（７）外周縁部に装
着する構造であっても良い。In addition, although the coil support stand μs was configured as a part of the molding die in the above description, the lower die may be integrally configured with the jig αυ. Further, the seal rubber may be attached to the outer peripheral edge of the seal A (7).

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、回転軸とこの回転軸
に取り付けられた整流子とが挿入支持される凹溝が形成
された基盤と、この基盤上に回動可能に支持され、上記
整流子の整流子片に電機的に接続される複数の単コイル
が載置されると共に、モールド型として使用できるコイ
ル支持台とを備え、コイル載置−コイル接続−成型加工
の主要な製造工程に同一治具を用いて連続して使用する
如くとしたので、仮固着コイルの製造時に溶剤を使用し
たり、加熱したりする必要がなくなり、加工品の脱着工
程が少なくなり、また、単コイルと整流子片との電気接
続が容易になり、作業工程間で生じるコイルの傷み・変
形が防止されると共に、回転バランスが良好で位置精度
（コイルの配置）および組上り精度の高められるものが
低製造コストで得られる効果がある。As described above, according to the present invention, there is provided a base having a concave groove into which a rotary shaft and a commutator attached to the rotary shaft are inserted and supported; A plurality of single coils electrically connected to the commutator pieces of the commutator are mounted, and a coil support stand that can be used as a mold is provided, and the main manufacturing steps of coil mounting, coil connection, and molding are carried out. Since the same jig is used for continuous use, there is no need to use solvent or heat during the production of temporarily fixed coils, reducing the number of steps for attaching and detaching processed products, and making it possible to produce single coils. This makes electrical connection between the coil and the commutator piece easier, prevents damage and deformation of the coil during work processes, and improves rotational balance, positioning accuracy (coil arrangement), and assembly accuracy. There is an effect obtained at low manufacturing cost.

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

第１図はこの発明の一実施例によるフラットモートルの
アマチュア製造装置を使用して電機子を組立てる状態を
説明する為の上面図、第２図は同じく第２段階工程仮面
着コイルの製造工程を示す断面図、第８図は同じく最終
工程（モールド成型工程）を示す成型金型装置の断面図
、第４図は成品（アマチュア）の外観略図、第５図乃至
第１０図は従来のアマチュア製造工程を示す図である。 図中、（４）・・・単コイル、（５）・・・整流子、σ
υ・・・治具、四・・・基盤、（１２ａ）・・・凹溝、
ａト・・コイル支持台、（１８ａ）・・・円盤上の凹溝
、（１８ｂ）・・・貫通孔、Ｑ４・・・切欠部、四・・
・回転軸、陵・・・電気抵抗溶接装置、αη・・・電源
装置、（至）及び０９・・・電極棒、（１）・・・モー
ルド金型のベース、（２０ａ）・・・凹＊Ｌ’２Ｉ／・
・・下型アセンブリ、（２）・・・上型、（２２ａ）・
樹脂注入穴、（２２ｂ）・・・凹溝、翰・・・電機子組
立体、（財）・・・シールゴム、Ｗｔ・・・仮固着コイ
ルアセンブリ、（ＰＩ・・・支持ピン、（４）・・***
である。 なお、図中、同一符号は同−又は相当部分を示す。Fig. 1 is a top view for explaining the state of assembling an armature using a flat motor armature manufacturing device according to an embodiment of the present invention, and Fig. 2 is a top view showing the manufacturing process of masked coils in the second stage. 8 is a sectional view of the molding device showing the final process (mold forming process), FIG. 4 is a schematic external view of the finished product (amateur), and FIGS. 5 to 10 are conventional amateur manufacturing. It is a figure showing a process. In the figure, (4)...Single coil, (5)...Commutator, σ
υ...Jig, 4...Base, (12a)...Concave groove,
a...Coil support base, (18a)...Concave groove on disk, (18b)...Through hole, Q4...Notch, 4...
・Rotating shaft, ridge...electric resistance welding device, αη...power supply, (to) and 09...electrode rod, (1)...base of mold, (20a)...concave *L'2I/・
・・Lower mold assembly, (2) ・・Upper mold, (22a)・
Resin injection hole, (22b)...concave groove, wire...armature assembly, (Foundation)...seal rubber, Wt...temporarily fixed coil assembly, (PI...support pin, (4) ...It is a small hole. In the figures, the same reference numerals indicate the same or equivalent parts.

Claims (3)

【特許請求の範囲】[Claims] （１）中心部に凹溝を有する基盤と、この基盤に回動可
納に支持され、中央に上記凹溝に対応する貫通孔を有し
、周辺部に複数のコイル支持ピンを有したコイル支持台
とを備え、上記基盤の凹溝と上記コイル支持台の貫通孔
とに、回転軸とこの回転軸に取り付けられた整流子を挿
入支持すると共に、予め所定形状に形成された複数の単
コイルを上記支持ピンにより位置決めして偏平状に配列
し、上記基盤上で上記コイル支持台を回動させながら上
記複数の単コイルと整流子の整流子片を電気的に接続し
た後、上記単コイルと整流子が載置された上記コイル支
持台をモールド型としてモールド材を注型、硬化させて
上記複数の単コイルを一体化するようにしたフラットモ
ートルのアマチュア製造方法。(1) A coil that is rotatably supported by a base having a groove in the center, a through hole corresponding to the groove in the center, and a plurality of coil support pins around the periphery. a support base, a rotary shaft and a commutator attached to the rotary shaft are inserted and supported into the concave groove of the base and the through hole of the coil support base, and a plurality of units preformed in a predetermined shape are provided. After positioning the coils with the support pins and arranging them in a flat shape and electrically connecting the plurality of single coils and the commutator pieces of the commutator while rotating the coil support on the base, An amateur manufacturing method for a flat motor, in which the coil support base on which the coil and commutator are mounted is used as a mold, and the plurality of single coils are integrated by casting and curing a molding material. （２）コイル支持台には複数の単コイルが載置される円
盤状の凹溝が形成されていることを特徴とする特許請求
の範囲第１項記載のフラットモートルのアマチュア製造
方法。(2) The method for manufacturing a flat motor amateur according to claim 1, wherein the coil support base is formed with a disc-shaped groove in which a plurality of single coils are placed. （３）基盤には整流子が挿入される凹溝に連通する切欠
部が形成され、この切欠部を介して、整流子片と単コイ
ルとを電気的に接続する一対の電極棒の一方を上記整流
子片の下部に接触させ、他方は単コイルを介して上記整
流子片の上部に接触させることを特徴とする特許請求の
範囲第１項記載のフラットモートルのアマチュア製造方
法。(3) A notch is formed in the base that communicates with the groove into which the commutator is inserted, and one of the pair of electrode rods that electrically connects the commutator piece and the single coil is inserted through this notch. 2. The method of manufacturing a flat motor armature according to claim 1, wherein one of said commutator pieces is brought into contact with the lower part of said commutator piece, and the other is brought into contact with the upper part of said commutator piece through a single coil.
JP1778485A 1985-01-30 1985-01-30 Manufacture of armature of flat motor Pending JPS61177142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1778485A JPS61177142A (en) 1985-01-30 1985-01-30 Manufacture of armature of flat motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1778485A JPS61177142A (en) 1985-01-30 1985-01-30 Manufacture of armature of flat motor

Publications (1)

Publication Number Publication Date
JPS61177142A true JPS61177142A (en) 1986-08-08

Family

ID=11953339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1778485A Pending JPS61177142A (en) 1985-01-30 1985-01-30 Manufacture of armature of flat motor

Country Status (1)

Country Link
JP (1) JPS61177142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265279A2 (en) * 1986-10-23 1988-04-27 Nihon Radiator Co., Ltd. Flat motor device, method and apparatus for producing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0265279A2 (en) * 1986-10-23 1988-04-27 Nihon Radiator Co., Ltd. Flat motor device, method and apparatus for producing the same
EP0265279A3 (en) * 1986-10-23 1989-07-19 Nihon Radiator Co., Ltd. Flat motor device, method and apparatus for producing the same

Similar Documents

Publication Publication Date Title
US3165816A (en) Method of manufacturing dynamoelectric machines
US6396189B1 (en) Stator assembly of rotary electric device and method of assembling the same
JPH01186143A (en) Coreless armature and manufacture thereof, and molding tool for coreless armature
US9824806B2 (en) Coil, rotating electrical machine, and method of manufacturing coil
JPH0412656A (en) Manufacture of stepping motor
CN109245349B (en) Hollow cup motor rotor and manufacturing method thereof
JPS61177142A (en) Manufacture of armature of flat motor
US20030151327A1 (en) Process for forming the stack of metallic laminations for the stator of an eletric motor and the stack of metallic laminations
US4782580A (en) Method of manufacture of slip ring assembly
US4420875A (en) Method of mounting and casting a flat rotor
CN207884382U (en) metal welding connector for motor stator
WO2020000698A1 (en) Rotor structure of motor, and motor
JPH0568939B2 (en)
JPS61214740A (en) Molded motor
JP7333887B1 (en) Stator, electric motor, stator manufacturing method, and electric motor manufacturing method
JPS6226260B2 (en)
CN219107165U (en) Motor and electronic equipment with motor
CN209881615U (en) Positioning tool for bonding magnetic steel
JPH06105506A (en) Manufacture of coreless coil
JPH1052018A (en) Resin-molded rotor for flat coreless motor, and manufacture thereof
JPS5694950A (en) Manufacture of flat type armature
JPS6233509Y2 (en)
JPS6051436A (en) Manufacture of motor with stator winding
JPH05122880A (en) Rotor for rotary electric machine
JPS6260446A (en) Manufacture of armature