JPS60211908A - Manufacture of cylindrical permanent magnet - Google Patents
Manufacture of cylindrical permanent magnetInfo
- Publication number
- JPS60211908A JPS60211908A JP6864684A JP6864684A JPS60211908A JP S60211908 A JPS60211908 A JP S60211908A JP 6864684 A JP6864684 A JP 6864684A JP 6864684 A JP6864684 A JP 6864684A JP S60211908 A JPS60211908 A JP S60211908A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- anisotropic
- space
- magnetic field
- cylindrical
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は希土類金属間化合物樹脂ボンド磁石でなかでも
、多極着磁して用いる円筒状磁石の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing a cylindrical magnet that is used with multipolar magnetization, particularly among rare earth intermetallic compound resin bonded magnets.
永久磁石材料の用途は、モーター、スピーカー各種磁気
センサー、アクチュエーターなど広汎である。Permanent magnetic materials have a wide range of applications, including motors, speakers, various magnetic sensors, and actuators.
永久磁石材料としては、フェライト磁石、アルニコ磁石
、希土類コバルト磁石などがあり、磁気特性は、この順
に大きいことが知られている。近時、希土類コバルト磁
石は、保磁力が高く且つエネルギー積も１０ＭＧＯｅ〜
３０ Ｍ Ｇ Ｏｅ級まで巾広く対応できる工業材料に
なった。本材料の用途の主流は、ステッピングモーター
である。ステッピングモーターに使用される磁石の形状
は、円筒状のものが多い。なかでもＰＭ型ステツビング
モ−ターにはほとんど円筒、円柱状磁石を多極着磁して
用いられる。径方向に多極着磁するためには、磁石は次
の程類を用いる。 、
■ 等方性、磁石
■ ラジアル異方性磁石
■ 極異方性磁石
■は、磁気性能が低い、エネルギー積で２〜５ＧＯｅ０
■は、形状の制限があり、内径１０１以下は配向磁場が
低い欠点がある。また量産性に乏しい。Permanent magnet materials include ferrite magnets, alnico magnets, rare earth cobalt magnets, and the like, and it is known that the magnetic properties are greatest in this order. Recently, rare earth cobalt magnets have a high coercive force and an energy product of 10 MGOe ~
It has become an industrial material that can be widely used up to 30 M G Oe class. The main application of this material is stepping motors. The magnets used in stepping motors are often cylindrical in shape. Among these, most PM type stepping motors use cylindrical or cylindrical magnets magnetized with multiple poles. In order to magnetize the magnet with multiple poles in the radial direction, the following equations are used for the magnet. , ■ Isotropic magnets ■ Radial anisotropic magnets ■ Polar anisotropic magnets ■ have low magnetic performance, energy product of 2 to 5 GOe0 ■ have shape restrictions, and inner diameters of 101 or less have a low orientation magnetic field. There are drawbacks. Also, it is not suitable for mass production.
■は、例えば特開昭５７−１２８９０９号にあるが、焼
結磁石の製造方法に用いるもので、焼結時の収縮率の差
による欠は割れ防止を目的とするものである。このため
連続量産性に欠ける。Item (2) is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-128909, and is used in a method for manufacturing sintered magnets, and is intended to prevent cracking due to the difference in shrinkage rate during sintering. Therefore, it lacks continuous mass production.
本発明は、この様な問題点を解決するもので、樹脂ボン
ド型磁石の新しい製造方法を提供するものである。本発
明の目的は、円筒状磁石で径方向に異方性を与えかつ複
数対極を有する高性能極異方性磁石ケつくることにある
。また第２の目的は量産性を高め大変コストパフォーマ
ンスの高い円筒状磁石をつくる。また最後ＶＣは、欠は
割れの少ない肉厚ｔ＝ｔ５χ〜０１χで、どんな長さの
磁石でも提供することにある。The present invention solves these problems and provides a new method for manufacturing resin-bonded magnets. An object of the present invention is to produce a high-performance polar anisotropic magnet which is a cylindrical magnet and has anisotropy in the radial direction and has a plurality of opposite poles. The second purpose is to improve mass productivity and produce cylindrical magnets with very high cost performance. Furthermore, the last VC is to provide a magnet of any length with a wall thickness t=t5χ~01χ with few cracks.
以下本発明の具体的構成について説明する。 The specific configuration of the present invention will be explained below.
本発明の異方性円筒状磁石は、第２図−Ａに示した、押
出成形装置によって製造される。The anisotropic cylindrical magnet of the present invention is manufactured by an extrusion molding apparatus shown in FIG. 2-A.
強磁性粉末１２はバレル１１の中でスクリュー１０によ
って、前方に送り込まれる。次に１３の軸（スピンドル
）と金型ダイス１９によって形成される空間部１５を、
コンパウンドは通過する。Ferromagnetic powder 12 is fed forward in barrel 11 by screw 10. Next, the space 15 formed by the 13 shafts (spindles) and the mold die 19,
The compound passes through.
この空間部は磁場全６〜２５ＫＯｅ加えである。磁場は
この空間を流動するコンパウンドの磁石粉末を異方性化
するため（粉末配向）に必要である。This space has a total magnetic field of 6 to 25 KOe. A magnetic field is necessary to anisotropize (powder orientation) the magnetic powder of the compound flowing in this space.
この時の磁場は６ＫＯθ以下では、配向度が落ちるため
で、２５ ＫＯｅ以上では消費電力に比べ、磁気性能向
上度合は少ない。また電磁石コイル電源が大型となり生
産に支障？来たし易いためである。At this time, if the magnetic field is less than 6 KOe, the degree of orientation decreases, and if it is more than 25 KOe, the degree of improvement in magnetic performance is small compared to the power consumption. Also, will the electromagnetic coil power supply become large and hinder production? This is because it is easy to come.
異方性全付与された円筒状磁石２２は、２１の冷却ダイ
ス及び２０の水冷コイルによって、冷却固化されて、つ
くられる。A fully anisotropic cylindrical magnet 22 is produced by being cooled and solidified using a cooling die 21 and a water cooling coil 20.
第１図−Ａは従来法のラジアルプレス装置の断面図であ
る。第２図−Ｂはこのプレス装置によってつくられたラ
ジアル異方性円筒磁石である。FIG. 1-A is a sectional view of a conventional radial press apparatus. FIG. 2-B shows a radially anisotropic cylindrical magnet produced by this press device.
捷ず原料の磁石粉末は、Ｓ ｍ （Ｃｏｂｏｌ ｃｌｉ
ｏ−０！ｌ Ｆｅｏ、２２ｚｒ０．０２Ｍ ）８．ｓ組
成で２−１７系希土類金属間化合物を用いた。その粒度
は２μｍ〜１００μｍであった。The raw material magnet powder without crushing is S m (Cobol cli
o-0! l Feo, 22zr0.02M)8. A 2-17 rare earth intermetallic compound with a composition of s was used. Its particle size was 2 μm to 100 μm.
この粉末に２．２ｗｔ％のエポキシ樹Ｉｎ混合し原料と
した。この混合粉末全第１図に示すプレス装置で加圧成
形した。該粉末は５の型内に装入され、磁場コイル６−
ａ、ｂに通電し発生した磁場はヨーク７およびコア１，
２の強磁性材料で導かれ、８でラジアル配向され力から
、非磁性のバンチ６゜４を介して、ｚｔｏｎ／ｍに加圧
され成形した。ガお９は油圧プレスシリンダーである。This powder was mixed with 2.2 wt% of epoxy tree In and used as a raw material. The entire mixed powder was press-molded using a press apparatus shown in FIG. The powder is charged into a mold 5, and a magnetic field coil 6-
The magnetic field generated by energizing a and b causes the yoke 7 and the core 1,
The material was guided by a ferromagnetic material No. 2, radially oriented at No. 8, and was pressurized to zton/m through a non-magnetic bunch 6°4. Gao 9 is a hydraulic press cylinder.
磁場配向の強さは、約１０ＫＯθ加え々から加圧成形し
、次に脱磁して、磁石を金型より取り出し、恒温槽で１
５０℃×１時間加熱キュアーした。得られたラジアル異
方性磁石の外形寸法は、φ２０×φ１７×５ｔ１であっ
た。The strength of the magnetic field orientation is approximately 10 KOθ. Pressure molding is performed, then demagnetized, the magnet is removed from the mold, and placed in a constant temperature bath for 1 hour.
It was heated and cured at 50°C for 1 hour. The outer dimensions of the obtained radial anisotropic magnet were φ20×φ17×5t1.
次に本磁石の磁気性能は以下の通りである。Next, the magnetic performance of this magnet is as follows.
また本磁石の生産性は、以下に示す。The productivity of this magnet is shown below.
〔実施例−１〕
比較例と同じ磁石粉末を用い、結合剤として、ナイロン
１２ｉ３５Ｖｏ１％加え、押出混練機で、３００℃に加
熱しながら予備混合した。このコンパウンドをペレット
状とし、第２図−八に示す、押出成形装置で円筒状異方
性磁石を製造した。[Example-1] Using the same magnet powder as in the comparative example, 1% of nylon 12i35Vo was added as a binder, and premixed with an extrusion kneader while heating at 300°C. This compound was formed into pellets, and cylindrical anisotropic magnets were manufactured using an extrusion molding apparatus shown in FIG. 2-8.
本実施例の製造条件は、仄の通りである。The manufacturing conditions of this example are as shown below.
Ｏダイス空間磁場強さ・・・１０ＫＯｅＯ加熱温度・パ
・・・・・・・・・・・・・・・・・・・２７０℃０加
圧力・・・・・・・・・・・・・・・・・・・・・・・
・８００Ｋｖ／ｃｒＡ第２図−Ｂは、第２図−Ａ、Ａ−
Ａ’の断面図で特に磁場かけと成形兼用金型ダイスの構
造を示す。O-dice space magnetic field strength...10KOeO Heating temperature/Pa......270℃0 Pressure......・・・・・・・・・・・・
・800Kv/crA Figure 2-B is Figure 2-A, A-
The cross-sectional view A' particularly shows the structure of the die for both magnetic field application and molding.
本例は、８極異方性成形の、コイル１６．磁極１７．１
７−ａ磁極先端により磁場かけ法は構成される。第３図
は、本発明方法によって得らｉ″した円筒状極異方性磁
石で、８極成形したものの消磁パターンを示す。本発明
磁石の磁気性能は次の通りである。In this example, the coil 16 is made of 8-pole anisotropic molding. magnetic pole 17.1
7-a The magnetic field application method is configured by the magnetic pole tip. FIG. 3 shows the demagnetization pattern of an 8-pole cylindrical polar anisotropic magnet obtained by the method of the present invention. The magnetic performance of the magnet of the present invention is as follows.
また生産性は以下の通りであった。The productivity was as follows.
・金 型・・・・・・・・・・・・１個取り、但し押出
成形なので連続生産される。・Mold・・・・・・・・・・・・Make one piece, but since it is extrusion molding, it is produced continuously.
０成形加工速度・・・２５０％／分
したがって磁石形状φ２０×φ１７×ｔｚは、５０コ／
分でできることになる。0 Molding processing speed...250%/min Therefore, the magnet shape φ20 x φ17 x tz is 50 pieces/min.
You can do it in minutes.
比較例の２コ／分の生産速度の約２．５倍という大変量
産性にすぐれたものであることが判明した。It was found that the production rate was approximately 2.5 times the production rate of 2 pieces/min of the comparative example, which was extremely excellent in mass productivity.
仄に８極着磁した円筒状磁石の表面磁束密度をガウスメ
ーターを用いて測定し以下の結果を得た。The surface magnetic flux density of a cylindrical magnet slightly magnetized with eight poles was measured using a Gauss meter, and the following results were obtained.
Ｏ本発明法・・・２０３０Ｇ〜２０５０Ｇ（Ｒ＝２０（
））Ｏ比較例・・・１９００Ｇ〜２０００Ｇ（Ｒ＝１０
０．ＯＧ）〔効果〕
以上詳記したように本発明法によれば、希土類金属間化
合物磁石粉末と樹脂バインダーからなる組成物を極異方
性磁場押出成形金型空間全通過させてつくる方法である
。その結果従来法にはない次のようなすぐれた効果を得
た。O Inventive method...2030G to 2050G (R=20(
)) O Comparative example...1900G to 2000G (R=10
0. OG) [Effects] As detailed above, according to the method of the present invention, a composition consisting of rare earth intermetallic compound magnet powder and a resin binder is made by passing through the entire space of a polar anisotropic magnetic field extrusion mold. . As a result, the following excellent effects not found in conventional methods were obtained.
（１）量産性は格段にすぐれ、低コスト円筒状磁石を提
供できる。(1) Mass production is much better, and low-cost cylindrical magnets can be provided.
（２）磁石の厚さが１．５％以下で且つ長尺物が自由′
にできる。(2) The thickness of the magnet is 1.5% or less and long objects are free.
Can be done.
（３）磁気性能を高められる。(3) Magnetic performance can be improved.
第１図Ａ、Ｂは従来法の磁場成形及び得られた磁石。
第２図Ａ、Ｂ、第６図は本発明方法の押出成形機、極異
方性金型、およ、び円筒状磁石を示す。
１・・・上コア−２・・・下コア−
３・・・上ハンチ ４・・・下ハンチ
５・・・磁石粉末 ６−ａ、’ｂ・・・コイル７・・・
ヨーク兼ダイ ８・・・磁束の流れ？・・・油圧シリン
ダー
１０・・・スクリュー １１・・・バレル１２・・・コ
ンパウンド １３・・・軸棒１４・・・ヒーター １５
・・・ダイス空間１６・・・コイル １７・・・ポール
ピース１７−ａ・・・ポールピース先端 １８・・・ヨ
ーク↑９・・・ダイス ２０・・・水冷コイル２１・・
・冷却ダイス ２２・・・極異方性円筒状磁石以 上
出願人 株式会社諏訪精工舎
第１図
Ａ
第２図
ζζ２図
第３図Figures 1A and 1B show conventional magnetic field forming and the resulting magnets. FIGS. 2A and 2B and FIG. 6 show an extrusion molding machine, a polar anisotropic mold, and a cylindrical magnet according to the method of the present invention. 1... Upper core - 2... Lower core - 3... Upper haunch 4... Lower haunch 5... Magnet powder 6-a,'b... Coil 7...
Yoke and die 8...Flow of magnetic flux? ... Hydraulic cylinder 10 ... Screw 11 ... Barrel 12 ... Compound 13 ... Shaft rod 14 ... Heater 15
...Dice space 16...Coil 17...Pole piece 17-a...Pole piece tip 18...Yoke ↑9...Dice 20...Water cooling coil 21...
・Cooling die 22... Polar anisotropic cylindrical magnet or more Applicant Suwa Seikosha Co., Ltd. Figure 1A Figure 2 ζζ2 Figure 3
Claims (1)
極異方性円筒状磁石を次の工程によりつくることを特徴
とする円筒状永久磁石の製造方法。 （１）押出成形装置によりつくる （２） 強磁性粉末は、イツトリウムおよびラントナイ
ド系希土類金属間化合物である （３）樹脂バインダーは、熱可塑性樹脂を用いる（４）
押出時の金型ダイの外周に沿って、Ｎ極とＳ極を交互
に配設してなる多極電磁石を配し金型ダイス空間に、６
Ｋ Ｏｅ〜２５ＫＯｅの磁場ケ加える。 （５）金型空間全通過する時の混合物は１００℃〜３５
０℃に加熱され流堂状を形成する。 （６） 押出成形された、円筒状磁石は、冷却固化され
、脱磁されて、ダイスより外部に排出される。[Claims] Using Conobound of ferromagnetic powder and resin binder,
A method for producing a cylindrical permanent magnet, characterized by producing a polar anisotropic cylindrical magnet through the following steps. (1) Produced using an extrusion molding device (2) The ferromagnetic powder is a yttrium and lantnide rare earth intermetallic compound (3) The resin binder is a thermoplastic resin (4)
Multi-pole electromagnets with N and S poles alternately arranged along the outer periphery of the mold die during extrusion are arranged in the mold die space.
A magnetic field of KOe to 25KOe is applied. (5) The mixture when passing through the mold space is 100℃~35
It is heated to 0°C and forms a stream shape. (6) The extruded cylindrical magnet is cooled, solidified, demagnetized, and discharged from the die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6864684A JPS60211908A (en) | 1984-04-06 | 1984-04-06 | Manufacture of cylindrical permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6864684A JPS60211908A (en) | 1984-04-06 | 1984-04-06 | Manufacture of cylindrical permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60211908A true JPS60211908A (en) | 1985-10-24 |
Family
ID=13379680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6864684A Pending JPS60211908A (en) | 1984-04-06 | 1984-04-06 | Manufacture of cylindrical permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60211908A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6426348A (en) * | 1987-06-16 | 1989-01-27 | Kinetoron Bv | Multipole rotor |
| EP0548952A2 (en) * | 1991-12-25 | 1993-06-30 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Method for producing a magnet roll |
| US5888416A (en) * | 1992-05-12 | 1999-03-30 | Seiko Epson Corporation | Rare-earth bonded magnet composition, rare-earth bonded magnet and process for producing said rare-earth bonded magnet |
| US6451221B1 (en) | 2000-12-28 | 2002-09-17 | Xerox Corporation | Extrudable magnet compound with improved flow properties |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49120196A (en) * | 1973-03-23 | 1974-11-16 | ||
| JPS5214440A (en) * | 1975-06-13 | 1977-02-03 | Finike Italiana Marposs | Apparatus for measuring geometric dimensions and errors of machine parts |
| JPS5326993A (en) * | 1976-08-24 | 1978-03-13 | Kanegafuchi Chemical Ind | Plastic magnet and method of manufactre thereof |
| JPS5623711A (en) * | 1979-08-02 | 1981-03-06 | Seiko Epson Corp | Production of intermetallic compound magnet |
| JPS57170502A (en) * | 1981-04-15 | 1982-10-20 | Fuji Xerox Co Ltd | Production of magneto roll |
| JPS58219705A (en) * | 1982-06-14 | 1983-12-21 | Maguetsukusu:Kk | Anisotropic ring polymer magnet and apparatus for manufacturing the same |
-
1984
- 1984-04-06 JP JP6864684A patent/JPS60211908A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49120196A (en) * | 1973-03-23 | 1974-11-16 | ||
| JPS5214440A (en) * | 1975-06-13 | 1977-02-03 | Finike Italiana Marposs | Apparatus for measuring geometric dimensions and errors of machine parts |
| JPS5326993A (en) * | 1976-08-24 | 1978-03-13 | Kanegafuchi Chemical Ind | Plastic magnet and method of manufactre thereof |
| JPS5623711A (en) * | 1979-08-02 | 1981-03-06 | Seiko Epson Corp | Production of intermetallic compound magnet |
| JPS57170502A (en) * | 1981-04-15 | 1982-10-20 | Fuji Xerox Co Ltd | Production of magneto roll |
| JPS58219705A (en) * | 1982-06-14 | 1983-12-21 | Maguetsukusu:Kk | Anisotropic ring polymer magnet and apparatus for manufacturing the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6426348A (en) * | 1987-06-16 | 1989-01-27 | Kinetoron Bv | Multipole rotor |
| EP0548952A2 (en) * | 1991-12-25 | 1993-06-30 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Method for producing a magnet roll |
| US5888416A (en) * | 1992-05-12 | 1999-03-30 | Seiko Epson Corporation | Rare-earth bonded magnet composition, rare-earth bonded magnet and process for producing said rare-earth bonded magnet |
| US6451221B1 (en) | 2000-12-28 | 2002-09-17 | Xerox Corporation | Extrudable magnet compound with improved flow properties |
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