JPS628506A - Radial direction bipolar magnet and apparatus for manufacturing same - Google Patents
Radial direction bipolar magnet and apparatus for manufacturing sameInfo
- Publication number
- JPS628506A JPS628506A JP14671785A JP14671785A JPS628506A JP S628506 A JPS628506 A JP S628506A JP 14671785 A JP14671785 A JP 14671785A JP 14671785 A JP14671785 A JP 14671785A JP S628506 A JPS628506 A JP S628506A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- magnet
- mold
- segment
- metal mold
- 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
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は半径方向に磁極を持つセグメント形状磁石及び
その製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a segment-shaped magnet having magnetic poles in the radial direction and an apparatus for manufacturing the same.
従来、この種の磁石は、第７図、第８図に示す様な直角
磁場プレス機でプレス成型することによシつくられてい
る。この装置は、非磁性体によるセグメント形状の金型
１．非磁性体の上パンチ２及び下・臂ンチ３とで金型１
内に充填された磁性粉末４をセグメント形状にプレス成
型する。そして。Conventionally, this type of magnet has been manufactured by press molding using a right-angle magnetic field press machine as shown in FIGS. 7 and 8. This device consists of a segment-shaped mold made of non-magnetic material. Mold 1 is formed with non-magnetic upper punch 2 and lower arm punch 3.
The magnetic powder 4 filled therein is press-molded into a segment shape. and.
このプレス成型体には、電磁石５により第７図に矢印Ｍ
で示す如く金型１の長手方向の軸に直角な一方向に磁場
が加えられる。このようにして半径方向に磁化されたプ
レス成型体は焼成され、第９〔発明が解決しようとする
問題点〕
このようにして得られた磁石は磁化方向が平行であるた
め、外周磁喋分布が第４図に曲線Ａで示すように正弦波
状となシ、磁石として使用する場合の総磁束が少ないと
いう欠点がある。This press-molded body is provided with an arrow M as shown in FIG. 7 by an electromagnet 5.
As shown, a magnetic field is applied in one direction perpendicular to the longitudinal axis of the mold 1. The press-molded body magnetized in the radial direction in this way is fired, and the magnets thus obtained have parallel magnetization directions, so the outer circumferential magnetic talk distribution However, since it has a sinusoidal shape as shown by curve A in FIG. 4, it has the disadvantage that the total magnetic flux when used as a magnet is small.
そこで２本発明の目的は、外周磁束分布を改良してよシ
多くの総磁束を得ることができるセグメント形状磁石及
びその製造装置を提供することにある。Accordingly, two objects of the present invention are to provide a segment-shaped magnet and a manufacturing apparatus thereof, which can improve the peripheral magnetic flux distribution and obtain a larger total magnetic flux.
本発明は、セグメント形状金型と、この金型内に充填さ
れた磁性粉末をプレスする手段と、金型内の磁性粉末に
対して金型の長手方向の軸と直角な方向の磁場を与える
手段とを有する磁石製造装置において、上記金型の内周
面近傍あるいは上記金型の内周面及び外周面近傍を強磁
性体としたことを特徴とする。この装置によれば、外周
磁束分布が大幅に改良されたセグメント形状磁石が得ら
れる。The present invention provides a segment-shaped mold, means for pressing magnetic powder filled in the mold, and applying a magnetic field perpendicular to the longitudinal axis of the mold to the magnetic powder in the mold. The magnet manufacturing apparatus has a ferromagnetic material in the vicinity of the inner peripheral surface of the mold, or in the vicinity of the inner peripheral surface and the outer peripheral surface of the mold. According to this device, a segment-shaped magnet with significantly improved outer circumferential magnetic flux distribution can be obtained.
以下２図面を参照して本発明の詳細な説明する。 The present invention will be described in detail below with reference to two drawings.
第１図は本発明による磁石製造装置の第１の実施例を示
した横断面図であシ、第７図と同一構成部分には同一参
照符号を付しである。この実施例では、金型１の内周面
近傍に金型１の長手方向に延びる円柱状の強磁性体７が
埋め込まれている。FIG. 1 is a cross-sectional view showing a first embodiment of a magnet manufacturing apparatus according to the present invention, and the same components as in FIG. 7 are given the same reference numerals. In this embodiment, a cylindrical ferromagnetic material 7 extending in the longitudinal direction of the mold 1 is embedded near the inner peripheral surface of the mold 1.
矢印は印加磁場の方向を示す。Arrows indicate the direction of the applied magnetic field.
この装置によれば、金型１内の磁性粉末４の磁束分布は
、金型１の内周面近傍に円柱状強磁性体７があることに
よシ１円柱状強磁性体７部に集中する。この磁性粉末４
を焼成して得られるセグメ、ント形状半径方向２極磁石
は、第３図に示すように、磁極に近い外周面において広
い範囲にわたって外周面に対して、実質上垂直方向に磁
化されたものが得られる。このようにして得られたセグ
メント形状磁石６の外周磁束分布は第４図に曲線Ｂで示
す通シである。According to this device, the magnetic flux distribution of the magnetic powder 4 in the mold 1 is concentrated in the 7 parts of the cylindrical ferromagnetic material 1 due to the presence of the cylindrical ferromagnetic material 7 near the inner peripheral surface of the mold 1. do. This magnetic powder 4
As shown in Figure 3, the segment-shaped radial dipole magnet obtained by firing the magnet is magnetized in a direction substantially perpendicular to the outer circumferential surface over a wide range on the outer circumferential surface near the magnetic pole. can get. The outer periphery magnetic flux distribution of the segment-shaped magnet 6 thus obtained is as shown by curve B in FIG.
第２図は本発明による磁石製造装置の第２の実施例を示
した横断面図である。この実施例は、金型１の内周面近
傍に円柱状の強磁性体７が埋め込まれていると共に、金
型１の外周面近傍に強磁性体８が設けられている。厳密
には、金型１に外周面側から切込みを設けて、この切込
みに強磁性体８を嵌着している。FIG. 2 is a cross-sectional view showing a second embodiment of the magnet manufacturing apparatus according to the present invention. In this embodiment, a cylindrical ferromagnetic material 7 is embedded near the inner peripheral surface of the mold 1, and a ferromagnetic material 8 is provided near the outer peripheral surface of the mold 1. Strictly speaking, a notch is provided in the mold 1 from the outer peripheral surface side, and the ferromagnetic material 8 is fitted into this notch.
なお、第４図の特性は、外周面の曲率半径Ｒｏｕｔ＝
ｌ Ｑ ｔｍ 、内周面の曲率半径Ｒｉｎ ＝ ６ ｔ
ｅａ ｐ長さＬ＝ １０１１ＩＩ及び角度０２１２０度
のセグメント形状希土類永久磁石に対しての測定結果を
示す。そして、総磁束φｇの測定励果は、従来（第９図
）のものに比較して２本発明（第３図）のものが約１５
−の大幅な向上を示した。Note that the characteristics shown in FIG. 4 are the radius of curvature of the outer peripheral surface Rout=
l Q tm, radius of curvature of inner peripheral surface Rin = 6 t
The measurement results are shown for a segment-shaped rare earth permanent magnet with a length L=1011II and an angle of 02120 degrees. The measured excitation result of the total magnetic flux φg is approximately 15
− showed a significant improvement.
上述した実施例は、１個のセグメント形状磁石を製造す
る装置について述べているが、第５図。Although the above-mentioned embodiment describes an apparatus for manufacturing one segment-shaped magnet, FIG.
第６図に示されるように、１対のセグメント形状磁石を
製造するものにも適用できるのは勿論である。Of course, the present invention can also be applied to manufacturing a pair of segment-shaped magnets as shown in FIG.
以上説明してきたように１本発明によれば異方性の方向
を磁石の外周面に対して垂直方向にすることにより、従
来のものよシ多い総磁束を得ることができる。本発明に
よる磁石は、モータ等に組み込むことによシ、従来のも
のより消費電力を少なくでき、よシ高能率のモータへの
使用に最適である。また、従来のものよシ総磁束量が多
いので。As explained above, according to the present invention, by making the direction of anisotropy perpendicular to the outer circumferential surface of the magnet, it is possible to obtain a total magnetic flux greater than that of the conventional method. When the magnet according to the present invention is incorporated into a motor or the like, it can consume less power than conventional magnets, and is most suitable for use in highly efficient motors. Also, the total amount of magnetic flux is larger than the conventional one.
小型化を図ることができ、かつ小型化によシ安価な磁石
を提供でき、産業上寄与する効果は大きい。It is possible to achieve miniaturization, and the miniaturization makes it possible to provide an inexpensive magnet, which has a great effect on industrial contribution.
第１図は本発明による磁石製造装置の第１の実施例を示
した横断面図、第２図は本発明による磁石製造装置の第
２の実施例を示した横断面図、第３図は本発明によシ得
られる磁石の磁化方向を説明するための図、第４図は従
来例と本発明の一実施例とを比較するための外周磁束分
布図、第５図は本発明による磁石製造装置の第３の実施
例を示した横断面図、第６図は本発明による磁石製造装
置の第４の実施例を示した横断面図、第７図は従来の磁
石製造装置を示した第８図のＤ−Ｄ線から見た横断面図
、第８図は第７図のＣ−Ｃ線から見た縦断面図、第９図
は従来の磁石の磁化方向を説明するための図である。
１・・・金型、２・・・上ノクンチ、３・・・下パンチ
、４・・・磁性粉末、５・・・電磁石、６・・・永久磁
石、７・・・円柱状強磁性体、８・・・強磁性体。
第３図
第４図
−ｔ）ｌ） Ｃ）
ｔｉｌｌ （浅）第７図FIG. 1 is a cross-sectional view showing a first embodiment of a magnet manufacturing apparatus according to the present invention, FIG. 2 is a cross-sectional view showing a second embodiment of a magnet manufacturing apparatus according to the present invention, and FIG. A diagram for explaining the magnetization direction of a magnet obtained according to the present invention, FIG. 4 is an outer circumferential magnetic flux distribution diagram for comparing a conventional example and an embodiment of the present invention, and FIG. 5 is a diagram for explaining the magnetization direction of a magnet according to the present invention. FIG. 6 is a cross-sectional view showing a third embodiment of the magnet manufacturing device, FIG. 6 is a cross-sectional view showing a fourth embodiment of the magnet manufacturing device according to the present invention, and FIG. 7 is a conventional magnet manufacturing device. FIG. 8 is a cross-sectional view taken from line D-D in FIG. 8, FIG. 8 is a longitudinal cross-sectional view taken from line C-C in FIG. 7, and FIG. 9 is a diagram for explaining the magnetization direction of a conventional magnet. It is. DESCRIPTION OF SYMBOLS 1...Mold, 2...Upper punch, 3...Lower punch, 4...Magnetic powder, 5...Electromagnet, 6...Permanent magnet, 7...Cylindrical ferromagnetic material , 8... ferromagnetic material. Figure 3 Figure 4-t) l) C)
till (shallow) Figure 7
Claims (1)
、上記磁極周辺の磁化方向が該磁石の外周面に対して実
質上垂直にされていることを特徴とする半径方向２極磁
石。 ２、セグメント形状金型と、該金型内に充填された磁性
粉末をプレスする手段と、該金型内の磁性粉末に対して
該金型の長手方向の軸と直角な方向の磁場を与える手段
とを有する磁石製造装置において、上記金型の内周面近
傍又は上記金型の内周面及び外周面近傍を強磁性体とし
たことを特徴とする磁石製造装置。[Claims] 1. A segment-shaped magnet having magnetic poles in the radial direction, characterized in that the direction of magnetization around the magnetic poles is substantially perpendicular to the outer peripheral surface of the magnet. magnet. 2. A segment-shaped mold, a means for pressing the magnetic powder filled in the mold, and applying a magnetic field in a direction perpendicular to the longitudinal axis of the mold to the magnetic powder in the mold. 1. A magnet manufacturing apparatus comprising: a ferromagnetic material in the vicinity of an inner peripheral surface of the mold, or in the vicinity of the inner peripheral surface and the outer peripheral surface of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14671785A JPS628506A (en) | 1985-07-05 | 1985-07-05 | Radial direction bipolar magnet and apparatus for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14671785A JPS628506A (en) | 1985-07-05 | 1985-07-05 | Radial direction bipolar magnet and apparatus for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS628506A true JPS628506A (en) | 1987-01-16 |
Family
ID=15413950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14671785A Pending JPS628506A (en) | 1985-07-05 | 1985-07-05 | Radial direction bipolar magnet and apparatus for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628506A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150308A (en) * | 1987-12-08 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Anisotropic permanent magnet |
| WO2012090841A1 (en) * | 2010-12-28 | 2012-07-05 | 日立金属株式会社 | Arc-shaped magnet having polar-anisotropy orientation, method of manufacturing for same, and die for manufacturing same |
| CN107617740A (en) * | 2016-07-15 | 2018-01-23 | 日立金属株式会社 | Sintered body, its manufacture method, decompressor and resin molded ring |
| WO2019238981A3 (en) * | 2019-08-20 | 2020-04-02 | Siemens Gamesa Renewable Energy A/S | Mould and method for manufacturing flux focusing permanent magnets comprising spread magnetic flux lines |
-
1985
- 1985-07-05 JP JP14671785A patent/JPS628506A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150308A (en) * | 1987-12-08 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Anisotropic permanent magnet |
| WO2012090841A1 (en) * | 2010-12-28 | 2012-07-05 | 日立金属株式会社 | Arc-shaped magnet having polar-anisotropy orientation, method of manufacturing for same, and die for manufacturing same |
| CN103299381A (en) * | 2010-12-28 | 2013-09-11 | 日立金属株式会社 | Arc-shaped magnet having polar-anisotropy orientation, method of manufacturing for same, and die for manufacturing same |
| US9646751B2 (en) | 2010-12-28 | 2017-05-09 | Hitachi Metals, Ltd. | Arcuate magnet having polar-anisotropic orientation, and method and molding die for producing it |
| CN107617740A (en) * | 2016-07-15 | 2018-01-23 | 日立金属株式会社 | Sintered body, its manufacture method, decompressor and resin molded ring |
| CN107617740B (en) * | 2016-07-15 | 2022-02-15 | 日立金属株式会社 | Sintered body, method for producing same, press device, and resin mold ring |
| WO2019238981A3 (en) * | 2019-08-20 | 2020-04-02 | Siemens Gamesa Renewable Energy A/S | Mould and method for manufacturing flux focusing permanent magnets comprising spread magnetic flux lines |
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