JP2000278919A - Magnet member and production thereof - Google Patents
Magnet member and production thereofInfo
- Publication number
- JP2000278919A JP2000278919A JP11076331A JP7633199A JP2000278919A JP 2000278919 A JP2000278919 A JP 2000278919A JP 11076331 A JP11076331 A JP 11076331A JP 7633199 A JP7633199 A JP 7633199A JP 2000278919 A JP2000278919 A JP 2000278919A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- yoke
- powder
- molding
- green body
- 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
Links
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，電気モータ用ロータ等に使用さ
れる磁石部材及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet member used for an electric motor rotor and the like, and a method for manufacturing the same.
【０００２】[0002]
【従来技術】電気モータは，回転するロータと固定され
ているステータという部品から構成されている。上記ロ
ータ及びステータのどちらか一つは磁石とヨークとで構
成される磁石部材からなる（後述の図５参照）。上記磁
石部材を作製するに当たり，従来は磁石とヨークとを別
々に作製し，その後，接着剤，バネ等を用いて結合させ
る方法が採用されていた。2. Description of the Related Art An electric motor is composed of a rotating rotor and a fixed stator. One of the rotor and the stator is formed of a magnet member composed of a magnet and a yoke (see FIG. 5 described later). In manufacturing the magnet member, a method has conventionally been used in which a magnet and a yoke are separately manufactured and then bonded using an adhesive, a spring, or the like.
【０００３】[0003]
【解決しようとする課題】ところで，電気モータでの磁
石部材は回転して使用される（磁石部材がロータである
場合）または回転する物品と組み合わせて使用される
（磁石部材がステータである場合）ため，セグメント状
（後述する図４（ａ），（ｃ）参照），またはリング状
（後述する図４（ｂ），（ｄ）参照）といった形状をと
ることが多い。また，磁石部材の小型化や低コスト化の
ために，磁石やヨークを薄肉構成とすることも広く行わ
れている。しかしながら，薄肉とすることで磁石やヨー
クの強度が低下し，焼成時やその後の研削加工時等に割
れや欠けが発生しやすくなる。By the way, the magnet member in the electric motor is used while rotating (when the magnet member is a rotor) or used in combination with a rotating article (when the magnet member is a stator). Therefore, it often takes a shape such as a segment shape (see FIGS. 4A and 4C described later) or a ring shape (see FIGS. 4B and 4D described later). Also, in order to reduce the size and cost of the magnet member, it is widely practiced to make the magnet and the yoke thin. However, when the thickness is reduced, the strength of the magnet and the yoke is reduced, and cracks and chips are likely to occur during firing or subsequent grinding.
【０００４】割れや欠けを防止するために，小さな棒状
の磁石片やヨーク片を作製し，これを貼り合わせ加工し
て，所望の大きさや形状（例えば後述する図４にかかる
リング状やセグメント状）の磁石やヨークを作り出すこ
ともできる。しかし，このような貼り合わせで作製され
た磁石やヨークよりなる磁石部材は発生する磁界が不均
一になりやすく，磁石部材の特性低下，ひいてはモータ
の特性低下につながるという問題がある。[0004] In order to prevent cracking and chipping, small rod-shaped magnet pieces and yoke pieces are produced and bonded together to obtain a desired size and shape (for example, a ring shape or a segment shape shown in FIG. 4 described later). ) Magnets and yokes can be created. However, there is a problem that the magnetic field generated by the magnet member or the yoke manufactured by such a lamination tends to be non-uniform, which leads to a deterioration in the characteristics of the magnet member and, consequently, the characteristics of the motor.
【０００５】また，従来の磁石部材は磁石とヨークとが
別々に作製されているため，両者を結合して磁石部材を
作製していたが，この結合に先立って，磁石とヨークと
が接する面を高精度にしなければならないため，両者を
研削する必要があった。この研削にかかる費用は磁石部
材の単価の大きな部分を占めており，磁石部材のコスト
削減について大きな問題となっていた。Further, in the conventional magnet member, since the magnet and the yoke are separately manufactured, the magnet and the yoke are combined to form the magnet member. However, prior to the connection, the surface where the magnet and the yoke come into contact is formed. Both of them had to be ground because they had to be highly accurate. The cost of this grinding accounts for a large part of the unit price of the magnet member, and has been a major problem in reducing the cost of the magnet member.
【０００６】更に，従来技術において，磁石とヨークと
を同時焼成して磁石部材を作製する方法が提案されてい
た（特開平７−１７７７１２号）。この方法は磁石とヨ
ークとを別々に成形し，それら成形体同士を組み合わせ
焼結するため，磁石とヨークとの界面にポア等の欠陥が
発生し易い。よって，磁石特性の低下を招き，かつ薄肉
の成形体だと，成形体の強度が極端に低くなるため，成
形時及び成形体を組み合わせるときに割れ，欠けが発生
する。このため，歩留まりが悪くなる。更に，両者の界
面強度が低いことから，強度的に脆弱な磁石部材となっ
てしまうという問題があった。Further, in the prior art, there has been proposed a method of manufacturing a magnet member by simultaneously firing a magnet and a yoke (Japanese Patent Application Laid-Open No. 7-177712). In this method, a magnet and a yoke are separately formed, and the formed bodies are combined and sintered, so that defects such as pores are easily generated at an interface between the magnet and the yoke. Therefore, the magnet properties are reduced, and the strength of the molded body is extremely low when the molded body is thin, so that cracks and chips occur during molding and when the molded bodies are combined. For this reason, the yield is deteriorated. Further, since the interface strength between the two is low, there is a problem that the magnet member is fragile in terms of strength.
【０００７】本発明は，かかる従来の問題点に鑑みてな
されたもので，強度が高く，価格が安価な磁石部材及び
その製造方法を提供しようとするものである。The present invention has been made in view of such conventional problems, and has as its object to provide a magnet member having high strength and low cost and a method of manufacturing the same.
【０００８】[0008]
【課題の解決手段】請求項１に記載の発明は，磁石とヨ
ークとからなる磁石部材を製造するに当たり，磁石用粉
末を成形部に充填して磁石用未焼成形体となし，上記磁
石用未焼成形体を上記成形部より取り出すことなく，ヨ
ーク用粉末を上記成形部に充填して上記磁石用未焼成形
体と一体化された状態にあるヨーク用未焼成形体を作製
するか，またはこれとは反対に，ヨーク用粉末を成形部
に充填してヨーク用未焼成形体となし，上記ヨーク用未
焼成形体を上記成形部より取り出すことなく，磁石用粉
末を上記成形部に充填して上記ヨーク用未焼成形体と一
体化された状態にある磁石用未焼成形体を作製し，その
後，両成形体を同時焼成することを特徴とする磁石部材
の製造方法にある。According to a first aspect of the present invention, in manufacturing a magnet member comprising a magnet and a yoke, a molding part is filled with a powder for a magnet to form an unsintered form for a magnet, Filling the molded part with the yoke powder without removing the fired form from the molded part to produce a green form for the yoke integrated with the green form for the magnet, or Conversely, the yoke powder is filled in the molded part to form a green body for the yoke, and the green powder for the magnet is filled in the molded part without removing the green body for the yoke from the molded part. There is provided a method for manufacturing a magnet member, comprising: preparing an unsintered form for a magnet in an integrated state with the unsintered form, and then simultaneously firing both formed bodies.
【０００９】本発明にかかる製造方法では，磁石用粉末
（またはヨーク用粉末）を成形し，磁石用未焼成形体
（またはヨーク用未焼成形体）を作製した後，これを成
形部内にそのままの状態で配置しておいて，更に成形部
内にヨーク用粉末（または磁石用粉末）を充填して，ヨ
ーク用未焼成形体（または磁石用未焼成形体）を作製す
る。このようにして磁石用未焼成形体とヨーク用未焼成
形体とが一体となった成形体を得ることができる。In the manufacturing method according to the present invention, the magnet powder (or yoke powder) is molded to produce an unsintered form for magnet (or unsintered form for yoke). Then, the yoke powder (or magnet powder) is further filled in the molded portion to produce an unsintered form for yoke (or unsintered form for magnet). In this way, it is possible to obtain a molded body in which the unsintered form for the magnet and the unsintered form for the yoke are integrated.
【００１０】本発明の作用効果について説明する。本発
明において最も注目すべきことは，次の通りである。上
記のように磁石粉末及びヨーク粉末のどちらか一方が粉
末の状態のままで，もう一方の成形体に接触することで
両者を隙間なく完全に密着させる。このような状態で一
体化された磁石用未焼成形体とヨーク用未焼成形体とを
同時焼成して磁石部材を製造する。このため，得られた
磁石部材において磁石とヨークとの界面に空気等の磁性
体以外の物質が入り込むことが防止され，ポアが生じ難
い。The operation and effect of the present invention will be described. The most remarkable aspects of the present invention are as follows. As described above, one of the magnet powder and the yoke powder is kept in a powder state, and is brought into contact with the other molded body, so that both are brought into close contact with each other without any gap. A magnet member is manufactured by simultaneously firing the unsintered form for magnet and the unsintered form for yoke integrated in such a state. Therefore, in the obtained magnet member, a substance other than a magnetic substance such as air is prevented from entering the interface between the magnet and the yoke, and pores are unlikely to occur.
【００１１】また，一体化された磁石部材が製造できる
ため，磁石とヨークとを結合する手間や加工賃が省略で
き，さらに磁石とヨークとの界面の研削等も不要とな
り，研削時の割れ，欠け等もなくなるため，磁石部材全
体の製造コストを下げることができる。In addition, since an integrated magnet member can be manufactured, the labor and processing cost for connecting the magnet and the yoke can be omitted, and the interface between the magnet and the yoke is not required. Since there is no chipping or the like, the manufacturing cost of the entire magnet member can be reduced.
【００１２】また，磁石とヨークとが一体化されている
ため，その分全体の強度が高まるため，焼成時やその後
の研削加工の際に，割れや欠けが生じ難い。つまり，本
発明より得られた磁石部材は強度が高い。In addition, since the magnet and the yoke are integrated, the overall strength is increased by that amount, so that cracks and chips are less likely to occur during firing or subsequent grinding. That is, the magnet member obtained according to the present invention has high strength.
【００１３】以上，本発明によれば，強度が高く，価格
が安価な磁石部材の製造方法を提供することができる。As described above, according to the present invention, it is possible to provide a method of manufacturing a magnet member having high strength and low cost.
【００１４】上記磁石用粉末としては，例えばＮｄ−Ｆ
ｅ−Ｂ系の粉末，Ｓｍ−Ｃｏ系の粉末を使用することが
できる。また，上記ヨーク用粉末としては，例えば電磁
ステンレス（ＳＵＳ４１０等），Ｆｅ−Ｓｉ鋼，Ｆｅ−
Ｎｉ系，Ｆｅ−Ｃｏ系の粉末を使用することができる。As the magnet powder, for example, Nd-F
An eB-based powder and an Sm-Co-based powder can be used. Examples of the yoke powder include electromagnetic stainless steel (SUS410 etc.), Fe-Si steel, Fe-
Ni-based or Fe-Co-based powders can be used.
【００１５】次に，請求項２の発明は，磁石とヨークと
からなる磁石部材を製造するに当たり，磁石用粉末を成
形部に充填し，続いてヨーク用粉末を上記成形部に充填
し，これらを同時成形して一体化された磁石用未焼成形
体とヨーク用未焼成形体とを作製するか，またはこれと
は反対に，ヨーク用粉末を成形部に充填し，続いて磁石
用粉末を上記成形部に充填し，これらを同時成形して一
体化された磁石用未焼成形体とヨーク用未焼成形体とを
作製し，その後，両成形体を焼成することを特徴とする
磁石部材の製造方法にある。Next, according to a second aspect of the present invention, in manufacturing a magnet member including a magnet and a yoke, a molding powder is filled in a molding portion, and subsequently, a yoke powder is filled in the molding portion. To form an integrated green body for magnet and a green body for yoke, or conversely, fill the molded part with powder for yoke and then transfer the powder for magnet A method for producing a magnet member, comprising: filling a molded part, simultaneously molding them, and forming an unsintered form for a magnet and an unsintered form for a yoke, and then sintering both the forms. It is in.
【００１６】本発明にかかる製造方法では，磁石用粉末
（またはヨーク用粉末）を充填し，続いてヨーク用粉末
（または磁石用粉末）を充填し，同時成形を施して，磁
石用未焼成形体とヨーク用未焼成形体とが一体となった
成形体を得る。In the manufacturing method according to the present invention, the powder for magnet (or powder for yoke) is filled, then the powder for yoke (or powder for magnet) is charged, and the molding is performed at the same time. And a green body for the yoke are obtained.
【００１７】本請求項の発明においても，上記のように
一体化された磁石用未焼成形体とヨーク用未焼成形体を
同時焼成して磁石部材を製造するため，得られた磁石部
材において磁石とヨークとの界面に空気等の磁性体以外
の物質が入り込むことが防止され，ポアが生じ難い。ま
た，一体化された磁石部材が製造できるため，磁石とヨ
ークとを結合する手間や加工賃が省略でき，さらに磁石
とヨークとの界面の研削等も不要となるため，磁石部材
全体の製造コストを下げることができる。Also in the present invention, the magnet member is manufactured by simultaneously firing the unsintered form for magnet and the unsintered form for yoke integrated as described above. Substances other than magnetic substances such as air are prevented from entering the interface with the yoke, and pores are unlikely to occur. In addition, since an integrated magnet member can be manufactured, the labor and processing cost for connecting the magnet and the yoke can be omitted, and the grinding of the interface between the magnet and the yoke is not required. Can be lowered.
【００１８】また，磁石とヨークとが一体化されている
ため，その分全体の強度が高まるため，焼成時や研削加
工の際に割れや欠けが生じ難く，強度に優れた磁石部材
を得ることができる。以上，本発明によれば，強度が高
く，価格が安価な磁石部材の製造方法を提供することが
できる。Also, since the magnet and the yoke are integrated, the strength of the whole is increased by that amount, so that a crack or chipping is less likely to occur during firing or grinding, and a magnet member having excellent strength is obtained. Can be. As described above, according to the present invention, it is possible to provide a method for manufacturing a magnet member having high strength and low cost.
【００１９】次に，請求項３の発明のように，上記磁石
用未焼成形体及び上記ヨーク用未焼成形体の作製はプレ
ス成形または磁場中プレス成形により行うことが好まし
い。通常の各種成形方法においては磁石用粉末やヨーク
用粉末の他にバインダーをいくらか添加して，粉末の流
動性，成形後の保形性を確保している。プレス成形や磁
場中プレス成形はバインダーの添加量を少なくできるた
め，後工程でのバインダー除去に伴う磁石部材の割れや
歪みの発生を少なくすることができ，生産性を高めるこ
とができる。Next, as in the third aspect of the present invention, it is preferable that the green body for the magnet and the green body for the yoke are manufactured by press molding or press molding in a magnetic field. In various usual molding methods, a binder is added to some extent in addition to the powder for the magnet and the powder for the yoke to ensure the fluidity of the powder and the shape retention after the molding. Since press forming and press forming in a magnetic field can reduce the amount of the binder to be added, it is possible to reduce the occurrence of cracks and distortion of the magnet member due to the removal of the binder in a later step, and to increase the productivity.
【００２０】また，上記プレス成形や磁場中プレス成形
に当たっては，例えば後述する実施形態例に示すごと
く，ダイに配置した下パンチや上パンチよりなる成形部
を用いることができる。また，上記プレス成形のプレス
圧０．５〜２．０ｋｇ／ｃｍ2で行なうことが好まし
い。また，各未焼成形体の相対密度が５０〜７０％とな
るようなプレス圧でプレス成形することが好ましい。In the press forming and the press forming in a magnetic field, for example, as shown in an embodiment to be described later, a formed portion including a lower punch and an upper punch arranged on a die can be used. Further, it is preferable to carry out the press molding at a press pressure of 0.5 to 2.0 kg / cm 2 . Further, it is preferable to press-mold at a pressing pressure such that the relative density of each green body is 50 to 70%.
【００２１】次に，請求項４の発明は，磁石とヨークと
からなる磁石部材であって，磁石用粉末を成形部に充填
して磁石用未焼成形体となし，上記磁石用未焼成形体を
上記成形部より取り出すことなく，ヨーク用粉末を上記
成形部に充填して上記磁石用未焼成形体と一体化された
状態にあるヨーク用未焼成形体を作製するか，またはこ
れとは反対に，ヨーク用粉末を成形部に充填してヨーク
用未焼成形体となし，上記ヨーク用未焼成形体を上記成
形部より取り出すことなく，磁石用粉末を上記成形部に
充填して上記ヨーク用未焼成形体と一体化された状態に
ある磁石用未焼成形体を作製し，その後，両成形体を同
時焼成してなることを特徴とする磁石部材にある。Next, a fourth aspect of the present invention is a magnet member comprising a magnet and a yoke, wherein a molding portion is filled with magnet powder to form an unsintered form for the magnet. Filling the molded part with the yoke powder without removing it from the molded part to produce a green form for the yoke that is integrated with the green form for the magnet, or conversely, The powder for yoke is filled in a molding part to form a green body for yoke, and the green body for magnet is filled in the molding part without removing the green body for yoke from the molding part. A magnet member characterized in that an unsintered form for a magnet in a state integrated with the above is produced, and then both molded bodies are simultaneously sintered.
【００２２】上記のように磁石粉末及びヨーク粉末のど
ちらか一方が粉末の状態のままで，もう一方の成形体に
接触することで両者を隙間なく完全に密着させる。この
ような状態で一体化された磁石用未焼成形体とヨーク用
未焼成形体とを同時焼成することで本請求項にかかる磁
石部材が得られる。よって，磁石とヨークとの界面に空
気等の磁性体以外の物質が入り込むことが防止されてい
るため，本請求項にかかる磁石部材にはポアが殆どな
い。As described above, while either one of the magnet powder and the yoke powder remains in the powder state, the powder is brought into contact with the other molded body, so that both are brought into close contact with no gap. The magnet member according to the present invention is obtained by simultaneously firing the unsintered form for magnet and the unsintered form for yoke in such a state. Therefore, since a substance other than a magnetic substance such as air is prevented from entering the interface between the magnet and the yoke, the magnet member according to the present invention has few pores.
【００２３】また，磁石とヨークとが一体化されている
ため，両者を結合する手間や加工賃が省略でき，さらに
両者の界面の研削等も不要となり，研削時の割れ，欠け
等もなくなるため，磁石部材全体の製造コストを下げる
ことができる。Further, since the magnet and the yoke are integrated, the labor and processing cost for joining the magnet and the yoke can be omitted, and further, the grinding or the like of the interface between the two is not required, and cracking and chipping at the time of grinding are eliminated. The manufacturing cost of the entire magnet member can be reduced.
【００２４】また，磁石とヨークとが一体化されている
ため，その分全体の強度が高まるため，焼成時やその後
の研削加工の際に，割れや欠けが生じ難い。つまり，強
度の高い磁石部材である。Further, since the magnet and the yoke are integrated, the strength of the whole is increased by that amount, so that cracking and chipping hardly occur during firing and subsequent grinding. That is, it is a high strength magnet member.
【００２５】以上，本発明によれば，強度が高く，価格
が安価な磁石部材を提供することができる。As described above, according to the present invention, it is possible to provide a magnet member having high strength and low cost.
【００２６】次に，請求項５の発明は，磁石とヨークと
からなる磁石部材であって，磁石用粉末を成形部に充填
し，続いてヨーク用粉末を上記成形部に充填し，これら
を同時成形して一体化された磁石用未焼成形体とヨーク
用未焼成形体とを作製するか，またはこれとは反対に，
ヨーク用粉末を成形部に充填し，続いて磁石用粉末を上
記成形部に充填し，これらを同時成形して一体化された
磁石用未焼成形体とヨーク用未焼成形体とを作製し，そ
の後，両成形体を焼成してなることを特徴とする磁石部
材にある。Next, a fifth aspect of the present invention is a magnetic member comprising a magnet and a yoke, wherein a magnet powder is filled in a molding portion, and subsequently, a yoke powder is filled in the molding portion. Simultaneously molding to produce an unsintered form for magnet and an unsintered form for yoke, or vice versa,
The molding part is filled with the powder for yoke, and then the powder for magnet is filled into the molding part, and these are simultaneously molded to produce an unsintered form for magnet and an unsintered form for yoke. And a magnet member obtained by firing both molded bodies.
【００２７】このようにして得られた磁石部材は，一体
化された磁石用未焼成形体とヨーク用未焼成形体とが同
時焼成されているため，磁石とヨークとの界面に空気等
の磁性体以外の物質が入り込むことが防止され，ポアを
殆どもたない。また，一体化された磁石部材が製造でき
るため，磁石とヨークとを結合する手間や加工賃が省略
でき，さらに磁石とヨークとの界面の研削等も不要とな
るため，磁石部材全体の製造コストを下げることができ
る。In the magnet member obtained in this manner, since the unsintered form for the magnet and the unsintered form for the yoke are simultaneously fired, a magnetic material such as air is formed at the interface between the magnet and the yoke. Other substances are prevented from entering and have almost no pores. In addition, since an integrated magnet member can be manufactured, the labor and processing cost for connecting the magnet and the yoke can be omitted, and the grinding of the interface between the magnet and the yoke is not required. Can be lowered.
【００２８】また，磁石とヨークとが一体化されている
ため，その分全体の強度が高まるため，焼成時や研削加
工の際に割れや欠けが生じ難く，強度に優れた磁石部材
を得ることができる。以上，本発明によれば，強度が高
く，価格が安価な磁石部材を提供することができる。Further, since the magnet and the yoke are integrated, the strength of the whole is increased by that amount, so that cracks and chips are less likely to occur during firing or grinding, and a magnet member having excellent strength is obtained. Can be. As described above, according to the present invention, it is possible to provide a magnet member having high strength and low cost.
【００２９】次に，請求項６の発明のように，上記磁石
用未焼成形体及び上記ヨーク用未焼成形体の作製はプレ
ス成形または磁場中プレス成形により行うことが好まし
い。上述と同様に，プレス成形や磁場中プレス成形はバ
インダーの添加量を少なくできるため，後工程でのバイ
ンダー除去に伴う磁石部材の割れや歪みの発生を少なく
することができ，生産性の高い磁石部材を得ることがで
きる。Next, as in the sixth aspect of the present invention, it is preferable that the green body for the magnet and the green body for the yoke are manufactured by press molding or press molding in a magnetic field. As described above, press forming and press forming in a magnetic field can reduce the amount of binder to be added, so that the occurrence of cracks and distortion of the magnet member due to binder removal in the subsequent process can be reduced, and a magnet with high productivity can be obtained. A member can be obtained.
【００３０】このような本発明の磁石部材は永久磁石使
用の電気モーター回転型，リニア型として使用すること
ができる。Such a magnet member of the present invention can be used as an electric motor rotating type or a linear type using a permanent magnet.
【００３１】[0031]
【発明の実施の形態】実施形態例 本発明の実施形態例にかかる磁石部材及びその製造方法
につき，図１〜図５を用いて説明する。本例の製造方法
の概略について説明する。図１，図２に示すごとく，磁
石用粉末１１９をダイ２１と下パンチ２３等よりなる成
形部２１０，２２０に充填して磁石用未焼成形体１１０
となし，上記磁石用未焼成形体１１０を上記成形部２１
０，２２０より取り出すことなく，ヨーク用粉末１２９
を上記成形部２１０，２２０に充填して上記磁石用未焼
成形体１１０と一体化された状態にあるヨーク用未焼成
形体１２０を作製する。その後，両成形体１１０，１２
０を同時焼成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment A magnet member and a method of manufacturing the same according to an embodiment of the present invention will be described with reference to FIGS. The outline of the manufacturing method of this example will be described. As shown in FIGS. 1 and 2, the magnet powder 119 is filled into molding parts 210 and 220 including a die 21 and a lower punch 23, and the unsintered form 110 for a magnet is filled.
Then, the unsintered form 110 for magnets is
0, 220 without removing the powder for yoke 129
Is filled in the molded portions 210 and 220 to produce the unsintered shape for yoke 120 integrated with the unsintered shape for magnet 110. After that, both molded bodies 110, 12
0 are fired simultaneously.
【００３２】以下，詳細に説明する。本例において作製
した磁石部材１は図５にかかる電気モータ３において，
ロータまたはステータとして使用される部材である。電
気モーター３は回転するロータと固定されているステー
タとからなり，ロータが磁石部材１の時はステータが電
磁石３２，逆にロータが電磁石３２の時はロータが磁石
部材１となる。The details will be described below. The magnet member 1 manufactured in this example is an electric motor 3 according to FIG.
A member used as a rotor or a stator. The electric motor 3 includes a rotating rotor and a fixed stator. When the rotor is the magnet member 1, the stator is the electromagnet 32, and when the rotor is the electromagnet 32, the rotor is the magnet member 1.
【００３３】図５（ａ）は磁石部材１の内周側にコイル
３２１と鉄心であるヨーク３２２とよりなる電磁石３２
が配置された電気モータ３である。図５（ｂ）は磁石部
材１の外周側にコイル３２１と鉄心であるヨーク３２２
とよりなる電磁石３２が配置された電気モータ３であ
る。図５（ｂ）は磁石部材１の外周側に電磁石３２が配
置された電気モータ３である。更に，図５（ａ）の電磁
石３２，図５（ｂ）の磁石部材１がロータの時はインナ
ーロータ型モータという。図５（ａ）の磁石部材がロー
タの時はアウターロータ型モータという。主にインナー
ロータ型モータは高回転型モータ，アウターロータ型モ
ータは高トルクモータに使用される。FIG. 5A shows an electromagnet 32 having a coil 321 and a yoke 322 as an iron core on the inner peripheral side of the magnet member 1.
Is the electric motor 3 arranged. FIG. 5B shows a coil 321 and a yoke 322 as an iron core on the outer peripheral side of the magnet member 1.
This is the electric motor 3 in which the electromagnet 32 is disposed. FIG. 5B shows an electric motor 3 in which an electromagnet 32 is arranged on the outer peripheral side of the magnet member 1. Further, when the electromagnet 32 in FIG. 5A and the magnet member 1 in FIG. 5B are rotors, they are called inner rotor type motors. When the magnet member in FIG. 5A is a rotor, it is called an outer rotor type motor. Mainly, the inner rotor type motor is used for a high rotation type motor, and the outer rotor type motor is used for a high torque motor.
【００３４】次に，本例にて作製した磁石部材１につい
て説明すると，図３（ａ），（ｂ）に示すごとく，リン
グ状の磁石１１と該磁石１１の側面と上面とを覆うよう
に設けたヨーク１２とよりなり，ヨーク１２の中心には
磁石部材１１の内側に入る電磁石固定用ベアリングの挿
入穴１９が設けてある。このものは図５（ａ）にかかる
電気モータに適用される。Next, the magnet member 1 manufactured in this embodiment will be described. As shown in FIGS. 3 (a) and 3 (b), the ring-shaped magnet 11 and the side and top surfaces of the magnet 11 are covered. The yoke 12 is provided with an insertion hole 19 for an electromagnet-fixing bearing that enters the inside of the magnet member 11 at the center of the yoke 12. This is applied to the electric motor according to FIG.
【００３５】このものを作製するに当り，図１（ａ）に
示すごとく，ダイ２１と複数の可動部より構成された下
パンチ２３とにより形成された成形部２１０に対し，フ
ィーダ２２を用いて磁石用粉末１１９を充填した。次
に，図１（ｂ）に示すごとく，複数の可動部より構成さ
れた上パンチ２４を上記成形部２１０の上方に配置し，
可動部を適宜動かして，成形部２１０における磁石用粉
末１１９を押圧し，磁石用未焼成形体１１０を作製し
た。In manufacturing this device, as shown in FIG. 1A, a forming part 210 formed by a die 21 and a lower punch 23 composed of a plurality of movable parts is formed by using a feeder 22. The magnet powder 119 was filled. Next, as shown in FIG. 1B, the upper punch 24 composed of a plurality of movable parts is arranged above the molding part 210,
The movable part was appropriately moved to press the magnet powder 119 in the molding part 210 to produce the unfired magnet body 110.
【００３６】続いて，図１（ｃ）に示すごとく，下パン
チ２１を磁石用未焼成形体１１０ごとダイ２１の下方に
移動し，成形部２２０を形成する。そして，フィーダ２
５を用いて上記成形部２２０にヨーク用粉末１２９を充
填した。そして，図２（ａ）に示すごとく，上パンチ２
４を上方に配置し，可動部を適宜動かして，成形部２２
０におけるヨーク用粉末１２９を押圧し，ヨーク用未焼
成形体１２０を得た。Subsequently, as shown in FIG. 1C, the lower punch 21 is moved below the die 21 together with the unfired form 110 for the magnet to form the forming part 220. And feeder 2
5, the molding part 220 was filled with the yoke powder 129. Then, as shown in FIG.
4 is disposed above, and the movable part is appropriately moved to form the molded part 22.
The powder 129 for the yoke in No. 0 was pressed to obtain a green body 120 for the yoke.
【００３７】その後，図２（ｂ）に示すごとく，上パン
チ２４を取り除き，下パンチ２３を動かして一体化成形
された両未焼成形体１１０，１２０をダイ２１の上方に
押し上げて，取り外す。このようにして一体化された未
焼成形体１１０，１２０が得られた。これを加熱炉に投
入し，焼成し，磁石１１とヨーク１２とよりなる磁石部
材１を得た。Then, as shown in FIG. 2B, the upper punch 24 is removed, and the lower punch 23 is moved to push the unmolded green bodies 110 and 120 integrally formed above the die 21 to be removed. The unfired shaped bodies 110 and 120 integrated in this way were obtained. This was put into a heating furnace and fired to obtain a magnet member 1 including a magnet 11 and a yoke 12.
【００３８】次に，本例の作用効果について説明する。
本例では，ダイ２１に配置された下パンチ２３やこれと
組み合わせた上パンチ２４とを適宜動かして成形部２１
０，２２０を形成し，磁石用粉末１１９から磁石用未焼
成形体１１０を作製し，これを成形部２１０，２２０よ
り取り出すことなく，ヨーク用粉末１２９を充填して磁
石用未焼成形体１２０と一体化された状態にあるヨーク
用未焼成形体１１０を作製した。Next, the operation and effect of this embodiment will be described.
In this example, the lower punch 23 disposed on the die 21 and the upper punch 24 combined with the lower punch 23 are appropriately moved to form the forming section 21.
No. 0, 220 is formed, and a green body for magnet 110 is produced from the powder for magnet 119, and is not taken out from the molding parts 210, 220, but is filled with the powder for yoke 129 and integrated with the green body for magnet 120. An unfired shaped body for yoke 110 in a liquefied state was produced.
【００３９】このため，磁石用未焼成形体１１０とヨー
ク用未焼成形体１２０との間に空気等の磁性体以外の物
質が入り難く，よってこの未焼成形体１１０，１２０に
より作製された磁石部材１の磁石１１とヨーク１２との
界面１３にはポアが殆どない。For this reason, it is difficult for substances other than the magnetic substance such as air to enter between the green body 110 for the magnet and the green body 120 for the yoke. The interface 13 between the magnet 11 and the yoke 12 has almost no pores.
【００４０】また，本例では一体化された磁石部材１が
製造できるため，磁石１１とヨーク１２とを結合する手
間や加工賃が省略でき，さらに磁石１１とヨーク１２と
の界面の研削等も不要となり，研削時の割れ，欠けもな
くなるため，磁石部材１全体の製造コストを下げること
ができる。また，磁石１１とヨーク１２とが一体化され
ているため，その分全体の強度が高まるため，焼成時や
研削加工の際に，割れや欠けが生じ難い。つまり，本発
明により得られた磁石部材は強度が高い。Further, in this embodiment, since the integrated magnet member 1 can be manufactured, the labor and processing cost for connecting the magnet 11 and the yoke 12 can be omitted, and the interface between the magnet 11 and the yoke 12 can be ground. Since it becomes unnecessary and cracks and chips are not generated during grinding, the manufacturing cost of the entire magnet member 1 can be reduced. In addition, since the magnet 11 and the yoke 12 are integrated, the overall strength is increased by that amount, so that cracking and chipping hardly occur during firing or grinding. That is, the magnet member obtained by the present invention has high strength.
【００４１】以上，本例によれば，強度が高く，価格が
安価な磁石部材及びその製造方法を提供することができ
る。As described above, according to the present embodiment, it is possible to provide a magnet member having high strength and low cost, and a method for manufacturing the same.
【００４２】なお，図４は各種形状の磁石部材１を説明
するものである。図４（ａ），（ｃ）はセグメント状の
磁石１１を持った磁石部材１である。図４（ｂ），
（ｄ）はリング状の磁石１１を持った磁石部材１であ
る。図４（ａ），（ｂ）は磁石部材１の外側に電磁石３
２を配置した構造の電気モータ３に使用され（図５
（ｂ）参照），内側の磁石部材１がロータとなるインナ
ーロータ型モータに適用される。符号１８は回転軸穴で
ある。FIG. 4 illustrates the magnet member 1 having various shapes. FIGS. 4A and 4C show a magnet member 1 having a segment-shaped magnet 11. FIG. 4 (b),
(D) is a magnet member 1 having a ring-shaped magnet 11. FIGS. 4A and 4B show an electromagnet 3 on the outside of the magnet member 1.
2 is used for an electric motor 3 having a structure in which
(See (b)), the invention is applied to an inner rotor type motor in which the inner magnet member 1 is a rotor. Reference numeral 18 denotes a rotation shaft hole.
【００４３】図４（ｃ），（ｄ）は磁石部材１の内側に
電磁石３２を配置した構造の電気モータ３に使用され
（図５（ａ）），外側の磁石部材１がロータとなるアウ
ターロータ型モータ，または内側の電磁石３２がロータ
となるインナーロータ型モータとなる。符号１７は電磁
石３２が配置される空間である。いずれの構造にかかる
磁石部材１であっても本例の製造方法によって作製する
ことができる。FIGS. 4C and 4D are used for an electric motor 3 having a structure in which an electromagnet 32 is arranged inside the magnet member 1 (FIG. 5A), and the outer magnet member 1 serves as a rotor. A rotor type motor or an inner rotor type motor in which the inner electromagnet 32 is a rotor. Reference numeral 17 denotes a space in which the electromagnet 32 is arranged. The magnet member 1 according to any structure can be manufactured by the manufacturing method of this example.
【図１】実施形態例における，磁石部材の製造工程を示
す説明図。FIG. 1 is an explanatory view showing a manufacturing process of a magnet member in the embodiment.
【図２】実施形態例における，図１に続く，磁石部材の
製造工程を示す説明図。FIG. 2 is an explanatory view showing a manufacturing process of the magnet member, following FIG. 1, in the embodiment.
【図３】実施形態例における，磁石部材の（ａ）断面
図，（ｂ）平面図。3A and 3B are a sectional view and a plan view of a magnet member according to the embodiment.
【図４】実施形態例における，各種形状を有する磁石部
材の説明図。FIG. 4 is an explanatory view of magnet members having various shapes according to the embodiment.
【図５】実施形態例における，２種類の電気モータを示
す説明図。FIG. 5 is an explanatory view showing two types of electric motors in the embodiment.
１．．．磁石部材， １１．．．磁石， １１０．．．磁石用未焼成形体 １１９．．．磁石用粉末， １２．．．ヨーク， １２０．．．ヨーク用未焼成形体， １２９．．．ヨーク用粉末， ２１０，２２０．．．成形部， 1. . . Magnet member, 11. . . Magnet, 110. . . Unfired form for magnet 119. . . 11. powder for magnet, . . York, 120. . . 129. Green body for yoke, . . Powder for yoke, 210, 220. . . Molding part,
───────────────────────────────────────────────────── フロントページの続き (72)発明者 茅野 久 愛知県刈谷市昭和町１丁目１番地 株式会 社デンソー内 Ｆターム(参考） 5H002 AA07 AB02 AC07 AE08 5H622 CA01 CA02 CA06 CA10 CB05 CB06 DD02 PP05 PP20 QA02 QA06 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hisashi Hisano 1-1-1, Showa-cho, Kariya-shi, Aichi F-term in Denso Co., Ltd. (Reference) 5H002 AA07 AB02 AC07 AE08 5H622 CA01 CA02 CA06 CA10 CB05 CB06 DD02 PP05 PP20 QA02 QA06
Claims (6)
するに当たり，磁石用粉末を成形部に充填して磁石用未
焼成形体となし，上記磁石用未焼成形体を上記成形部よ
り取り出すことなく，ヨーク用粉末を上記成形部に充填
して上記磁石用未焼成形体と一体化された状態にあるヨ
ーク用未焼成形体を作製するか，またはこれとは反対
に，ヨーク用粉末を成形部に充填してヨーク用未焼成形
体となし，上記ヨーク用未焼成形体を上記成形部より取
り出すことなく，磁石用粉末を上記成形部に充填して上
記ヨーク用未焼成形体と一体化された状態にある磁石用
未焼成形体を作製し，その後，両成形体を同時焼成する
ことを特徴とする磁石部材の製造方法。In manufacturing a magnet member comprising a magnet and a yoke, a molding part is filled with a magnet powder to form a green body for a magnet, and the green body for a magnet is not taken out from the molding part. And filling the yoke powder into the molding section to produce an unsintered yoke form integrated with the green form for the magnet, or conversely, applying the yoke powder to the molding section. Filled to form a green body for yoke, without removing the green body for yoke from the molded part, filling the molded part with magnet powder and integrating it with the green body for yoke. A method for producing a magnet member, comprising: preparing a green body for a magnet, and then simultaneously firing both formed bodies.
するに当たり，磁石用粉末を成形部に充填し，続いてヨ
ーク用粉末を上記成形部に充填し，これらを同時成形し
て一体化された磁石用未焼成形体とヨーク用未焼成形体
とを作製するか，またはこれとは反対に，ヨーク用粉末
を成形部に充填し，続いて磁石用粉末を上記成形部に充
填し，これらを同時成形して一体化された磁石用未焼成
形体とヨーク用未焼成形体とを作製し，その後，両成形
体を焼成することを特徴とする磁石部材の製造方法。2. In manufacturing a magnet member comprising a magnet and a yoke, a magnet part is filled in a molding part, and subsequently a yoke powder is filled in the molding part, and these parts are simultaneously molded and integrated. The green body for the magnet and the green body for the yoke are manufactured or, on the contrary, the yoke powder is filled in the molded part, and then the magnet powder is filled in the molded part, and these are mixed. A method for producing a magnet member, comprising: simultaneously forming and integrating an unsintered form for a magnet and an unsintered form for a yoke, and thereafter firing both the formed bodies.
未焼成形体及び上記ヨーク用未焼成形体の作製はプレス
成形または磁場中プレス成形により行うことを特徴とす
る磁石部材の製造方法。3. The method for manufacturing a magnet member according to claim 1, wherein the green body for a magnet and the green body for a yoke are manufactured by press molding or press molding in a magnetic field.
て，磁石用粉末を成形部に充填して磁石用未焼成形体と
なし，上記磁石用未焼成形体を上記成形部より取り出す
ことなく，ヨーク用粉末を上記成形部に充填して上記磁
石用未焼成形体と一体化された状態にあるヨーク用未焼
成形体を作製するか，またはこれとは反対に，ヨーク用
粉末を成形部に充填してヨーク用未焼成形体となし，上
記ヨーク用未焼成形体を上記成形部より取り出すことな
く，磁石用粉末を上記成形部に充填して上記ヨーク用未
焼成形体と一体化された状態にある磁石用未焼成形体を
作製し，その後，両成形体を同時焼成してなることを特
徴とする磁石部材。4. A magnet member comprising a magnet and a yoke, wherein a powder for magnets is filled in a molding part to form an unsintered form for magnet without removing the unsintered form for magnet from the molding part. Filling the molded part with the yoke powder to produce a green form for the yoke which is integrated with the green form for the magnet, or, on the contrary, filling the molded part with the yoke powder The unformed green body for yoke is formed, and the unformed green body for yoke is filled with the powder for magnet without being taken out of the formed part, and is in a state of being integrated with the unformed green body for yoke. A magnet member characterized by producing an unsintered form for a magnet, and then simultaneously sintering both molded bodies.
て，磁石用粉末を成形部に充填し，続いてヨーク用粉末
を上記成形部に充填し，これらを同時成形して一体化さ
れた磁石用未焼成形体とヨーク用未焼成形体とを作製す
るか，またはこれとは反対に，ヨーク用粉末を成形部に
充填し，続いて磁石用粉末を上記成形部に充填し，これ
らを同時成形して一体化された磁石用未焼成形体とヨー
ク用未焼成形体とを作製し，その後，両成形体を焼成し
てなることを特徴とする磁石部材。5. A magnet member comprising a magnet and a yoke, wherein a powder for magnets is filled in a molding portion, and then a powder for yoke is charged in the molding portion, and these are simultaneously molded and integrated. A green body for magnet and a green body for yoke are prepared, or conversely, powder for yoke is filled in the molded part, and then powder for magnet is filled in the molded part, and these are simultaneously formed. A magnet member formed by forming a green body for a magnet and a green body for a yoke that are integrated by molding, and then firing both the green bodies.
未焼成形体及び上記ヨーク用未焼成形体の作製はプレス
成形または磁場中プレス成形により行うことを特徴とす
る磁石部材。6. The magnet member according to claim 4, wherein the green body for the magnet and the green body for the yoke are manufactured by press molding or press molding in a magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076331A JP2000278919A (en) | 1999-03-19 | 1999-03-19 | Magnet member and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076331A JP2000278919A (en) | 1999-03-19 | 1999-03-19 | Magnet member and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000278919A true JP2000278919A (en) | 2000-10-06 |
Family
ID=13602382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11076331A Pending JP2000278919A (en) | 1999-03-19 | 1999-03-19 | Magnet member and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000278919A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006064948A1 (en) * | 2004-12-17 | 2006-06-22 | Hitachi Metals, Ltd. | Rotor for motor and method for producing the same |
| JP2007074888A (en) * | 2004-12-17 | 2007-03-22 | Hitachi Metals Ltd | Rotor for motor and manufacturing method therefor |
| US7847460B2 (en) | 2006-03-01 | 2010-12-07 | Hitachi Metals, Ltd. | Yoke-integrated bonded magnet and magnet rotator for motor using the same |
| FR2969415A1 (en) * | 2010-12-17 | 2012-06-22 | Bosch Gmbh Robert | Component i.e. rotor, producing method for electric machine, involves magnetizing and hardening magnetic material, and designing body in hollow cylindrical shape and with bridge for coaxially holding body on shaft |
| JP2013169085A (en) * | 2012-02-15 | 2013-08-29 | Sumitomo Electric Ind Ltd | Magnet for rotary machine, component for rotary machine and rotary machine |
-
1999
- 1999-03-19 JP JP11076331A patent/JP2000278919A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006064948A1 (en) * | 2004-12-17 | 2006-06-22 | Hitachi Metals, Ltd. | Rotor for motor and method for producing the same |
| JP2007074888A (en) * | 2004-12-17 | 2007-03-22 | Hitachi Metals Ltd | Rotor for motor and manufacturing method therefor |
| KR100908424B1 (en) * | 2004-12-17 | 2009-07-21 | 히타치 긴조쿠 가부시키가이샤 | Parts for magnetic circuits and manufacturing method thereof |
| US8039998B2 (en) | 2004-12-17 | 2011-10-18 | Hitachi Metals, Ltd. | Rotor for motor and method for producing the same |
| US7847460B2 (en) | 2006-03-01 | 2010-12-07 | Hitachi Metals, Ltd. | Yoke-integrated bonded magnet and magnet rotator for motor using the same |
| FR2969415A1 (en) * | 2010-12-17 | 2012-06-22 | Bosch Gmbh Robert | Component i.e. rotor, producing method for electric machine, involves magnetizing and hardening magnetic material, and designing body in hollow cylindrical shape and with bridge for coaxially holding body on shaft |
| JP2013169085A (en) * | 2012-02-15 | 2013-08-29 | Sumitomo Electric Ind Ltd | Magnet for rotary machine, component for rotary machine and rotary machine |
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