JPH08242548A - Method for joining permanent magnet to iron - Google Patents
Method for joining permanent magnet to ironInfo
- Publication number
- JPH08242548A JPH08242548A JP7041731A JP4173195A JPH08242548A JP H08242548 A JPH08242548 A JP H08242548A JP 7041731 A JP7041731 A JP 7041731A JP 4173195 A JP4173195 A JP 4173195A JP H08242548 A JPH08242548 A JP H08242548A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- iron
- magnet
- joining
- solder
- 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.)
- Withdrawn
Links
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、永久磁石と鉄とを接合
する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a permanent magnet and iron.
【０００２】[0002]
【従来の技術】従来、界磁極に永久磁石を有する同期電
動機では、高速回転時に発生する遠心応力によって、永
久磁石が回転子から脱落しないように固着するため、
接着材を用いる方法、補強リングの焼きばめによる方
法、アラミド繊維等の強化繊維を巻き付ける方法、
機械的にかしめる方法等の４つの方法が採用されてい
る。一方、永久磁石には、防食を目的として、永久磁石
表面にＮiめっき或いＡlコーティングを施している。2. Description of the Related Art Conventionally, in a synchronous motor having a permanent magnet in a field pole, the permanent magnet is fixed so as not to fall off from the rotor due to centrifugal stress generated during high speed rotation.
A method of using an adhesive, a method of shrink-fitting a reinforcing ring, a method of winding reinforcing fibers such as aramid fibers,
Four methods such as a mechanical caulking method are adopted. On the other hand, the permanent magnet has Ni plating or Al coating on the surface of the permanent magnet for the purpose of anticorrosion.
【０００３】[0003]
【発明が解決しようとする課題】従来、回転子に界磁極
を有する場合、高速回転時に発生する遠心応力によっ
て、永久磁石が回転子から脱落しないように固着されて
いる。その手法として、以下の四つの手法が挙げられ
る。Conventionally, in the case where the rotor has a field pole, the permanent magnet is fixed so as not to fall off from the rotor due to centrifugal stress generated during high speed rotation. The following four methods are mentioned as the method.
【０００４】接着剤を用いる方法 補強リング等の焼きばめによる方法 アラミド繊維などの強化繊維を巻き付ける方法 機械的にかしめる方法Method using an adhesive Method by shrink fitting a reinforcing ring Method of winding reinforcing fibers such as aramid fiber Method of mechanical crimping
【０００５】しかしながら、上述した〜の手法で
は、次の問題を生じていた。上記の方法は、永久磁石
と回転子とを接着剤により固着する方法であが、回転数
が上昇すると、遠心力に耐えられないという欠点があ
る。上記の方法は、非磁性の補強リングを永久磁石装
着後に焼きばめをし、固着する方法であるが、焼きばめ
リングに高精度の加工を必要とし、また、組立にも高い
精度が要求されるという欠点がある。However, the methods (1) to (3) described above have the following problems. Although the above method is a method of fixing the permanent magnet and the rotor to each other with an adhesive, there is a drawback that the centrifugal force cannot be endured when the rotation speed increases. The above method is a method of shrink-fitting a non-magnetic reinforcing ring after mounting it with a permanent magnet, and then fixing it. There is a drawback that is done.
【０００６】上記の方法は、アラミド繊維などの強化
繊維を巻き付ける方法であるが、張力を掛けながら巻き
付ける必要があり、困難な作業を必要とするという欠点
がある。上記の方法は、機械的なひっかかり、即ち、
かしめ用のピンを用いて固着する方法であるが、永久磁
石が脆性材料のため、引っ掛かり部またはかしめ部等に
応力が集中した場合、信頼性に乏しいという欠点があ
る。The above method is a method of winding a reinforcing fiber such as an aramid fiber, but it has a drawback that it needs to be wound while applying tension, which requires a difficult work. The above method is mechanically trapped, i.e.
This is a method of fixing by using a crimping pin, but since the permanent magnet is a brittle material, there is a drawback that reliability is poor when stress is concentrated on a catching portion or a crimping portion.
【０００７】以上のことから、上記〜の手法に代わ
る、永久磁石と鉄との新たな接合法が望まれている。
尚、金属材料の接合に一般に用いられている硬ろう付け
では、その接合温度が８００℃程度の高温となるので、
永久磁石の性能が低下してしまうという欠点もある。本
発明は、上記従来技術に鑑みてなされたものであり、永
久磁石と鉄とを低い温度で接合し、永久磁石の性能が損
なわれないようにすることのできる接合法を提供するこ
とを目的とする。From the above, there is a demand for a new joining method of permanent magnets and iron, which is an alternative to the above methods (1) to (3).
In addition, in hard brazing generally used for joining metal materials, the joining temperature is as high as about 800 ° C.,
There is also a drawback that the performance of the permanent magnet is reduced. The present invention has been made in view of the above conventional technique, and an object of the present invention is to provide a joining method capable of joining a permanent magnet and iron at a low temperature so as not to impair the performance of the permanent magnet. And
【０００８】[0008]
【課題を解決するための手段】斯かる目的を達成する本
発明の構成は、永久磁石と鉄とを接合する際に、アルミ
ニウム用半田を用いること特徴とし、更に、記永久磁石
を着磁したままで接合することを特徴とする。The structure of the present invention which achieves such an object is characterized in that a solder for aluminum is used when joining a permanent magnet and iron, and the permanent magnet is magnetized. It is characterized by joining up to the end.
【０００９】[0009]
【作用】本発明によれば、永久磁石と鉄とを接合する際
に、アルミニウム用半田を用いることで、低い温度での
接合が可能となる。更に、アルミニウム用半田の半田付
けの温度は、永久磁石の性能を損なわない程度の温度で
あるため、着磁された永久磁石をそのまま接合できる。According to the present invention, when the permanent magnet and the iron are joined, the solder for aluminum is used, so that the joining can be performed at a low temperature. Furthermore, since the soldering temperature of the aluminum solder is such that the performance of the permanent magnet is not impaired, the magnetized permanent magnet can be joined as it is.
【００１０】[0010]
【実施例】以下、本発明について、図面に示す実施例を
参照して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings.
【００１１】本発明の一実施例を図１に示す。本実施例
は、永久磁石と鉄とを半田付けする方法に関するもので
ある。先ず、永久磁石を１００℃程度に加熱する。永久
磁石を半田付したときに表面と内部との温度差による割
れが発生しないようにするためである。次に、永久磁石
にフラックスを塗布する。An embodiment of the present invention is shown in FIG. The present embodiment relates to a method of soldering a permanent magnet and iron. First, the permanent magnet is heated to about 100 ° C. This is to prevent cracking due to the temperature difference between the surface and the inside when soldering the permanent magnet. Next, flux is applied to the permanent magnet.
【００１２】引き続き、アルミニウム用半田を用いて、
永久磁石と鉄とを半田付けする。本実施例では、永久磁
石として、Ｓm-Ｃo系永久磁石を採用した。ここで、Ｓm
-Ｃo系永久磁石は４００〜４５０℃で消磁が生じ、ま
た、Ｎd-Ｆe-Ｂ系永久磁石は２００〜２５０℃で消磁が
消磁が生じる。Subsequently, using aluminum solder,
Solder the permanent magnet and iron. In this embodiment, an Sm-Co based permanent magnet is used as the permanent magnet. Where Sm
The demagnetization occurs at 400 to 450 ° C for the -Co type permanent magnet, and the demagnetization occurs at 200 to 250 ° C for the Nd-Fe-B type permanent magnet.
【００１３】従って、半田付けの温度を、高くとも２５
０℃程度とすると、Ｓm-Ｃo系永久磁石の性能を損なう
ことはない。また、この程度の温度ならば、着磁したま
まの作業が可能であり、磁気を消すことなく作業をする
ことができる。更に、接合完了後に、硬ろう付けの場合
には、着磁を行う。本実施例では、半田及びフラックス
として、日本ウェルディングロット製アルミニウム用半
田（商品名：Ｔ２３５）及びフラックス（商品名：ＳＤ
Ｇ）を用いた。Therefore, the soldering temperature should be 25 at maximum.
At about 0 ° C, the performance of the Sm-Co based permanent magnet will not be impaired. Further, at this temperature, it is possible to work while magnetized, and it is possible to work without erasing the magnetism. Further, after the joining is completed, magnetization is performed in the case of hard brazing. In this embodiment, as the solder and the flux, the solder for aluminum (trade name: T235) and the flux (trade name: SD) manufactured by Nippon Welding Lot are used.
G) was used.
【００１４】上述したように本実施例では、永久磁石と
鉄とを接合する際に、アルミニウム用半田を用いること
で、低い温度での接合が可能となるため、接着に代わる
密着性の高い接合が可能となる。具体的には、密着強度
はおよそ８０ＭＰａ（≒８ｋｇｆ／ｍｍ2)であり、従来
の接着材による方法の２０ＭＰａに比べて高くなってい
る。また、アルミニウム用半田の半田付けの温度は、永
久磁石の性能を損なわない程度の温度であるため、着磁
された永久磁石をそのまま接合でき、作業工程が簡略化
される。As described above, in this embodiment, when the permanent magnet and the iron are joined, the solder for aluminum is used, so that the joining can be performed at a low temperature. Is possible. Specifically, the adhesion strength is approximately 80 MPa (≈8 kgf / mm 2 ), which is higher than 20 MPa of the conventional adhesive method. Moreover, since the soldering temperature of the aluminum solder is a temperature that does not impair the performance of the permanent magnet, the magnetized permanent magnet can be bonded as it is, and the working process is simplified.
【００１５】[0015]
【発明の効果】以上、実施例に基づいて具体的に説明し
たように、本発明によれば、永久磁石と鉄とを接合する
際に、アルミニウム用半田を用いることで、低い温度で
の接合が可能となるため、接着に代わる密着性の高い接
合が可能となる。また、半田付けの温度は、永久磁石の
性能を損なわない程度の温度であるため、着磁された永
久磁石をそのまま接合でき、作業工程が簡略化される。As described above in detail with reference to the embodiments, according to the present invention, when the permanent magnet and the iron are joined, by using the solder for aluminum, the joining is performed at a low temperature. As a result, it is possible to perform bonding with high adhesion instead of adhesion. Moreover, since the soldering temperature is a temperature at which the performance of the permanent magnet is not impaired, the magnetized permanent magnet can be bonded as it is, and the working process is simplified.
【図１】永久磁石と鉄との接合を示すフローチャートで
ある。FIG. 1 is a flowchart showing joining of a permanent magnet and iron.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成７年６月８日[Submission date] June 8, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Name of item to be corrected] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】従来、界磁極に永久磁石を有する同期電
動機では、高速回転時に発生する遠心応力によって、永
久磁石が回転子から脱落しないように固着するため、
接着材を用いる方法、補強リングの焼きばめによる方
法、アラミド繊維等の強化繊維を巻き付ける方法、
機械的にかしめる方法等の４つの方法が採用されてい
る。一方、永久磁石には、防食を目的として、永久磁石
表面にＮiめっき或いはＡlコーティングを施している。2. Description of the Related Art Conventionally, in a synchronous motor having a permanent magnet in a field pole, the permanent magnet is fixed so as not to fall off from the rotor due to centrifugal stress generated during high speed rotation.
A method of using an adhesive, a method of shrink-fitting a reinforcing ring, a method of winding reinforcing fibers such as aramid fibers,
Four methods such as a mechanical caulking method are adopted. On the other hand, the permanent magnets, the purpose of corrosion prevention, Ni plating some are in the permanent magnet surface is subjected to Al coating.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】引き続き、アルミニウム用半田を用いて、
永久磁石と鉄とを半田付けする。本実施例では、永久磁
石として、Ｓm-Ｃo系永久磁石を採用した。ここで、Ｓm
-Ｃo系永久磁石は４００〜４５０℃で消磁が生じ、ま
た、Ｎd-Ｆe-Ｂ系永久磁石は２００〜２５０℃で消磁が
生じる。Subsequently, using aluminum solder,
Solder the permanent magnet and iron. In this embodiment, an Sm-Co based permanent magnet is used as the permanent magnet. Where Sm
-Co-based permanent magnet demagnetization occurs at 400 to 450 ° C., also, Nd-Fe-B based permanent magnet demagnetization occurs at 200 to 250 ° C..
Claims (2)
ニウム用半田を用いること特徴とする永久磁石と鉄との
接合方法。1. A method for joining a permanent magnet and iron, wherein a solder for aluminum is used when joining the permanent magnet and iron.
ことを特徴とする請求項１記載の永久磁石と鉄の接合方
法。2. The method for joining a permanent magnet and iron according to claim 1, wherein the permanent magnet is joined while being magnetized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7041731A JPH08242548A (en) | 1995-03-01 | 1995-03-01 | Method for joining permanent magnet to iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7041731A JPH08242548A (en) | 1995-03-01 | 1995-03-01 | Method for joining permanent magnet to iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08242548A true JPH08242548A (en) | 1996-09-17 |
Family
ID=12616575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7041731A Withdrawn JPH08242548A (en) | 1995-03-01 | 1995-03-01 | Method for joining permanent magnet to iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08242548A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002538596A (en) * | 1999-03-05 | 2002-11-12 | エテック システムズ インコーポレイテッド | Schottky and field emission electron guns with enhanced angular strength |
| JP2016533148A (en) * | 2013-10-11 | 2016-10-20 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Assembly for electric machine, method for manufacturing assembly, and electric machine provided with assembly |
-
1995
- 1995-03-01 JP JP7041731A patent/JPH08242548A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002538596A (en) * | 1999-03-05 | 2002-11-12 | エテック システムズ インコーポレイテッド | Schottky and field emission electron guns with enhanced angular strength |
| JP2016533148A (en) * | 2013-10-11 | 2016-10-20 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Assembly for electric machine, method for manufacturing assembly, and electric machine provided with assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020507 |