JPH03173103A - Manufacture of bond magnet - Google Patents
Manufacture of bond magnetInfo
- Publication number
- JPH03173103A JPH03173103A JP1312758A JP31275889A JPH03173103A JP H03173103 A JPH03173103 A JP H03173103A JP 1312758 A JP1312758 A JP 1312758A JP 31275889 A JP31275889 A JP 31275889A JP H03173103 A JPH03173103 A JP H03173103A
- Authority
- JP
- Japan
- Prior art keywords
- rotating
- molded
- magnetic powder
- cylindrical
- molding
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 239000006247 magnetic powder Substances 0.000 claims abstract description 13
- 238000000748 compression moulding Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 5
- 239000003822 epoxy resin Substances 0.000 abstract description 4
- 229920000647 polyepoxide Polymers 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 abstract description 4
- 229930185605 Bisphenol Natural products 0.000 abstract description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 abstract description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
イ９発明の目的
〔産業上の利用分野〕
本発明は、磁性粉末と熱硬化性樹脂を混合し、圧縮成形
により円筒又は円柱状の成形体とした後、樹脂を硬化さ
せることによって得られるボンド磁石の寸法精度を高め
るための製造方法に関するものである。Detailed Description of the Invention A9.Objective of the Invention [Field of Industrial Application] The present invention involves mixing magnetic powder and a thermosetting resin, forming a cylindrical or cylindrical molded body by compression molding, and then molding the resin. The present invention relates to a manufacturing method for increasing the dimensional accuracy of bonded magnets obtained by curing.
ボンド磁石は次に挙げるような焼結磁石では得られない
特徴を有するため、近年需要が著しく増加している。Demand for bonded magnets has increased significantly in recent years because they have the following characteristics that cannot be obtained with sintered magnets.
１、複雑薄肉形状のものが容易に得られる。1. Complex thin shapes can be easily obtained.
２、ラジアル異方性の磁石が容易に得られる。2. Radial anisotropic magnets can be easily obtained.
３、焼結磁石に比軟して脆弱さが少ない。3. It is softer and less brittle than sintered magnets.
４、量産性に優れる。4. Excellent mass production.
このボンド磁石の代表的な製造方法は、例えばエポキシ
樹脂のような熱硬化性樹脂を磁性粉末に、対して２〜４
重量％加えた後、混合した混合物を所望の金型に装入し
、圧縮成形して成形体とし、加熱などの操作によって樹
脂を硬化させ、製品とするものである。その中でも円筒
又は円柱状の成形体はこのような製造工程においては、
圧縮成形した直後の成形体の機械的強度が小さく、成形
後のハンドリング等の取扱い時に変形しやすく、成形体
の真円度に悪影響を及ぼし、変形又は製品の寸法精度が
低下するという欠点があった。A typical manufacturing method for this bonded magnet is to mix thermosetting resin such as epoxy resin with magnetic powder,
After adding % by weight, the mixed mixture is charged into a desired mold, compression molded to form a molded body, and the resin is cured by heating or other operations to form a product. Among them, cylindrical or cylindrical molded bodies are manufactured in this manufacturing process.
The mechanical strength of the molded product immediately after compression molding is low, and it is easily deformed during handling after molding, which adversely affects the roundness of the molded product, resulting in deformation and reduced dimensional accuracy of the product. Ta.
本発明は、これらの欠点を除去するため円筒又は円柱状
の成形体を回転させながら樹脂を硬化させることにより
製品の真円度を向上させ、寸法精度の高いボンド磁石を
提供することを目的とする。The present invention aims to improve the roundness of the product by curing the resin while rotating a cylindrical or cylindrical molded body in order to eliminate these defects, and to provide a bonded magnet with high dimensional accuracy. do.
前述の磁性粉末と熱硬化性樹脂の混合物を圧縮成形によ
り円筒又は円柱状の成形体とした後、成形金型から抜い
た成形体は、−膜内には成形金型の寸法より大きい場合
が多い。これは圧縮成形において一般的にみられるスプ
リングバックによる膨張と解される。又、その成形体は
機械的強度が小さく、その後のハンドリング等の操作に
より真円度に悪影響を及ぼし、製品の寸法精度が低下す
るという欠点がある。そこで本発明は、製品の真円度を
向上させ、寸法精度を高めるよう構成したもので、真円
度の低下した成形体を回転させながら硬化することによ
り真円度を高めながら硬化することを特徴とする。After the mixture of magnetic powder and thermosetting resin described above is compression molded into a cylindrical or cylindrical molded body, the molded body is removed from the molding die. many. This is understood to be expansion due to springback, which is commonly seen in compression molding. In addition, the molded product has a low mechanical strength, and subsequent handling operations adversely affect the roundness, resulting in a reduction in the dimensional accuracy of the product. Therefore, the present invention is configured to improve the roundness of the product and increase the dimensional accuracy.The present invention is designed to improve the roundness of the product and increase the dimensional precision. Features.
以下余白
口０発明の構成
〔課題を解決するための手段〕
即ち本発明は、磁性粉末と熱硬化性樹脂を混合し、圧縮
成形により円筒、又は円柱状の成形体とした後、該成形
体を、熱硬化させる際に回転させながら硬化させること
を特徴とするボンド磁石の製造方法である。Structure of the Invention [Means for Solving the Problem] The present invention has the following features: After mixing magnetic powder and a thermosetting resin and forming a cylindrical or cylindrical molded body by compression molding, the molded body is This is a method for manufacturing a bonded magnet, which is characterized in that the bonded magnet is cured while being rotated during thermal curing.
成形体を回転させる際、その成形体の高さより大きい幅
の溝を付けた円筒内に入れ、熱を加えながらその真円度
のよい円筒を所定の速度で回すことで、しかも成形体が
円筒の中で位置をかえて円筒の溝からはみだしたり、内
周面を遠心力で円筒の回転とついて回ったのでは真円度
はおろか、所定の真円度は得られない。又、円筒内径面
に掘られた溝は成形体がかくれるほど深くなくてよいが
、少なくとも成形体の半径より浅くない方がよい。When rotating a molded object, the molded object is placed in a cylinder with a groove with a width larger than the height of the molded object, and the well-rounded cylinder is rotated at a predetermined speed while applying heat. If the cylinder changes its position inside the cylinder and protrudes from the groove of the cylinder, or if the inner peripheral surface follows the rotation of the cylinder due to centrifugal force, it will not be possible to obtain the desired roundness, let alone the roundness. Further, the groove dug in the inner diameter surface of the cylinder does not have to be so deep that it hides the molded body, but it is better that it is at least not shallower than the radius of the molded body.
成形体の回転を絶えず一定で促し、常に一定の力が加わ
り、しかも成形体の回転位置を変えないようにする条件
を別のシュミレーションで見つけ出し、成形体の外径内
径高さの寸法で成形体の位置がかわるので、シュミレー
ションにより見つけ出すのがよく、原理的には球をつく
るのにドラムの中を回転させ球体を製造する方法と同じ
理由で真円度のよい製品を作ることにあるが、成形体の
回転面に常に一定の力が加わり、低下した真円度を、熱
硬化する際、矯正しながら硬化させることが出来る。又
、円筒に付けた溝をらせん状にすることで成形体の熱硬
化工程の出し入れが連続的になりより量産性に優れた方
法となる。We conducted another simulation to find conditions that would encourage constant rotation of the molded object, apply a constant force at all times, and prevent the rotational position of the molded object from changing. Since the position of the ball changes, it is best to find out through simulation.The principle is to make a product with good roundness for the same reason as the method of manufacturing a sphere by rotating the inside of a drum. A constant force is always applied to the rotating surface of the molded body, and the reduced roundness can be corrected and hardened during heat curing. Furthermore, by making the groove formed in the cylinder spiral, the molded body can be continuously taken in and out of the heat curing process, resulting in a method that is more suitable for mass production.
純度９５％以上のＮｄ、電解鉄、フェロボロンを所定量
秤量し、アルゴンガス雰囲気中高周波加熱により溶解し
て鋳込み、３１．１ｗｔ％Ｎｄ −６７、９ｗｔ％Ｆｅ
−１、Ｏｗｔ％Ｂなる組成のインゴットを得た。次に
このインゴットをアルゴンガス雰囲気中で高周波加熱に
より、再溶解した後、周速３５ｍ／ｓｅｃで回転する銅
製のロールの表面に噴射し、厚さ約３０μｍの合金薄帯
を得、平均粒径５０μｍｍまで粉砕し、磁性粉末を得た
。ビスフェノール系エポキシ樹脂を重量比で３ｗｔ％と
なるように秤量してこの磁性粉末を混合した。Weigh a predetermined amount of Nd, electrolytic iron, and ferroboron with a purity of 95% or higher, melt and cast them by high-frequency heating in an argon gas atmosphere, and make 31.1wt%Nd-67, 9wt%Fe.
An ingot having a composition of -1, Owt%B was obtained. Next, this ingot was remelted by high-frequency heating in an argon gas atmosphere, and then sprayed onto the surface of a copper roll rotating at a circumferential speed of 35 m/sec to obtain an alloy ribbon with a thickness of about 30 μm, with an average particle size of The powder was ground to 50 μmm to obtain magnetic powder. Bisphenol-based epoxy resin was weighed out to a weight ratio of 3 wt %, and this magnetic powder was mixed.
この原料粉末を外径３０ｍｍ、内径２４ｍｍの金型で５
ｔｏｎ／ｃ１１２の圧力で圧縮成形し、高さ２５ｍｍ＋
のリング状成形体を５０個作製した。This raw material powder was molded into a mold with an outer diameter of 30 mm and an inner diameter of 24 mm.
Compression molded at a pressure of 112 tons/c, height 25mm+
Fifty ring-shaped molded bodies were produced.
次にこれらの成形体を第１図に示した回転式熱硬化装置
の中に入れ、幅２７ｍｍの試料保持のための溝３に試料
１のように置き、回転軸支持体６と回転数制御装置付モ
ーター５によりシュミレーションによって得られた回転
速度、即ち５０回転／分で回転円筒２を回転させ、温度
制御装置付電気炉４で１００℃で２時間回転させながら
硬化を行った。Next, these molded bodies were placed in the rotary thermosetting apparatus shown in Fig. 1, placed in the groove 3 for holding the sample with a width of 27 mm like sample 1, and connected to the rotating shaft support 6 and the rotation speed control device. The rotating cylinder 2 was rotated by a motor 5 equipped with a device at a rotational speed obtained by simulation, that is, 50 revolutions/minute, and curing was performed while rotating at 100° C. for 2 hours in an electric furnace 4 equipped with a temperature control device.
又比較例として本発明と同様に調整したＮｄ−Ｆｅ−Ｂ
粉末を本発明と同様に圧縮成形して５０個のリング状成
形体を作製した。これらを恒温槽の中に置き、１００℃
で２時間硬化を行った。これらの試料の外径、内径寸法
を測定し、その平均値、範囲、標準偏差を第１表に示し
た。Also, as a comparative example, Nd-Fe-B prepared in the same manner as in the present invention
The powder was compression molded in the same manner as in the present invention to produce 50 ring-shaped molded bodies. Place these in a constant temperature bath at 100°C.
Curing was performed for 2 hours. The outer diameter and inner diameter of these samples were measured, and the average value, range, and standard deviation are shown in Table 1.
以下余白
第１表
この結果より、本発明は明らかにボンド磁石成形体真円
度が向上し、寸法のばらつきが極めて小さくなり、寸法
精度の高い成形体が得られることが理解出来た。From the results, it can be seen that the present invention clearly improves the roundness of the bonded magnet molded product, extremely reduces dimensional variation, and provides a molded product with high dimensional accuracy.
本発明に使用される磁性粉末は、粉末として得られる磁
性材料であれば基本的に特に使用制限なく使用可能で、
例えば硬質磁性材料としてバリウムフェライト、ストロ
ンチウムフェライト、希土類コバルト、ネオジウム鉄ホ
ウ素が挙げられ、軟磁性材料として、マンガン亜鉛フェ
ライト、パーマロイ等が挙げられる。磁性粉末の粒度は
特に規制されるものではないが、混合、成形等の作業性
、製品の外観等を考慮すると粒径２００μｍ以下とした
方が望ましい。The magnetic powder used in the present invention can basically be used without any particular restrictions as long as it is a magnetic material obtained as a powder.
For example, hard magnetic materials include barium ferrite, strontium ferrite, rare earth cobalt, neodymium iron boron, and soft magnetic materials include manganese zinc ferrite, permalloy, and the like. Although the particle size of the magnetic powder is not particularly restricted, it is preferable that the particle size is 200 μm or less in consideration of workability such as mixing and molding, and the appearance of the product.
又、本発明に使用される熱硬化性樹脂としては、エポキ
シ樹脂、不飽和ポリエステル樹脂、フェノール樹脂等が
挙げられるがこれらに限定されるものではない。磁性粉
末と熱硬化性樹脂の混合比率は製品に要求される磁気特
性、機械的強度によって異なるが、熱硬化性ｍ脂が多過
ぎると、磁気特性の低下を招き、少な過ぎると機械的強
度が低下するばかりか、満足な成形体が得られないこと
があり、その最も望ましい混合比率は重量比で熱硬化性
樹脂が０〜１０ｗｔ％（ただしＯは含まない）である。Further, the thermosetting resin used in the present invention includes, but is not limited to, epoxy resin, unsaturated polyester resin, and phenol resin. The mixing ratio of magnetic powder and thermosetting resin varies depending on the magnetic properties and mechanical strength required for the product, but too much thermosetting resin will lead to a decrease in magnetic properties, and too little will lead to a decrease in mechanical strength. In addition, a satisfactory molded product may not be obtained, and the most desirable mixing ratio is 0 to 10 wt % of the thermosetting resin (not including O).
ハ１発明の効果
〔発明の効果〕
以上述べたごとく本発明によれば、磁性粉末と熱硬化性
樹脂の混合物を圧縮成形し、得られた成形体を回転させ
ながら硬化することによりハンドリング等により真円度
の低下した成形体を真円度を高めながら硬化させる利点
を持った寸法精度の高いボンド磁石の提供が可能となっ
た。C1 Effects of the invention [Effects of the invention] As described above, according to the present invention, a mixture of magnetic powder and thermosetting resin is compression molded, and the resulting molded product is cured while being rotated, so that it can be easily handled, etc. It has become possible to provide a bonded magnet with high dimensional accuracy that has the advantage of hardening a molded body with reduced roundness while increasing its roundness.
第１図は、本発明による回転式熱硬化法を用いた装置の
簡単な原理図である。
１・・・試料、２・・・回転円筒、３・・・溝、４・・
・温度制御装置付電気炉、５・・・回転数制御装置付モ
ーター、６・・・回転軸支持体。
第７図FIG. 1 is a simple principle diagram of an apparatus using a rotary thermosetting method according to the present invention. 1... Sample, 2... Rotating cylinder, 3... Groove, 4...
- Electric furnace with temperature control device, 5... Motor with rotation speed control device, 6... Rotating shaft support. Figure 7
Claims (1)
円筒、又は円柱状の成形体とした後、該成形体を、熱硬
化させる際に回転させながら硬化させることを特徴とす
るボンド磁石の製造方法。1. Production of a bonded magnet characterized by mixing magnetic powder and thermosetting resin, forming a cylindrical or cylindrical molded body by compression molding, and then curing the molded body while rotating during thermosetting. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1312758A JPH03173103A (en) | 1989-11-30 | 1989-11-30 | Manufacture of bond magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1312758A JPH03173103A (en) | 1989-11-30 | 1989-11-30 | Manufacture of bond magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03173103A true JPH03173103A (en) | 1991-07-26 |
Family
ID=18033071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1312758A Pending JPH03173103A (en) | 1989-11-30 | 1989-11-30 | Manufacture of bond magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03173103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570705A (en) * | 2017-07-20 | 2018-01-12 | 武汉大学 | Metal increasing material manufacturing magnetically controlled sputter method and device |
-
1989
- 1989-11-30 JP JP1312758A patent/JPH03173103A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570705A (en) * | 2017-07-20 | 2018-01-12 | 武汉大学 | Metal increasing material manufacturing magnetically controlled sputter method and device |
| CN107570705B (en) * | 2017-07-20 | 2019-11-29 | 武汉大学 | Metal increasing material manufacturing magnetically controlled sputter method and device |
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