JPH01206608A - How to magnetize rare earth magnets - Google Patents
How to magnetize rare earth magnetsInfo
- Publication number
- JPH01206608A JPH01206608A JP3219888A JP3219888A JPH01206608A JP H01206608 A JPH01206608 A JP H01206608A JP 3219888 A JP3219888 A JP 3219888A JP 3219888 A JP3219888 A JP 3219888A JP H01206608 A JPH01206608 A JP H01206608A
- Authority
- JP
- Japan
- Prior art keywords
- magnetization
- rare earth
- magnet
- magnetizing
- conducted
- 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
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 12
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 12
- 230000005415 magnetization Effects 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000006247 magnetic powder Substances 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052796 boron Inorganic materials 0.000 claims abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 3
- 239000011572 manganese Substances 0.000 claims 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052748 manganese Inorganic materials 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 150000003624 transition metals Chemical class 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 230000005405 multipole Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000007850 degeneration Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業の利用分野〕 本発明は永久磁石の着磁方法に関する。[Detailed description of the invention] [Field of industrial use] The present invention relates to a method of magnetizing a permanent magnet.
基本組成がＲ−Ｆｅ−Ｂからなる希土類磁石は保磁力（
ｉＨｃ）が大きいために、着磁の際に大きな着磁磁場が
必要で、ごく限られた形状の磁石で、２極着磁のような
単純なパターンの磁石しか得られていない。A rare earth magnet whose basic composition is R-Fe-B has a coercive force (
iHc) is large, a large magnetizing magnetic field is required for magnetization, and only magnets with very limited shapes and simple patterns such as bipolar magnetization have been obtained.
一般に希土類磁石を飽和着磁するためにはｉ ＨＣの２
−３倍の着磁磁場を必要とする。従って、磁石の形状に
よっては十分な着磁磁場が得られないために着磁できな
いものがある。また、着磁が出来るものについても装置
が大きなものになるので着磁のコストが高くなるという
問題点ををしている。In general, in order to saturately magnetize a rare earth magnet, i HC 2
- Requires 3 times as much magnetizing field. Therefore, depending on the shape of the magnet, some magnets cannot be magnetized because a sufficient magnetizing magnetic field cannot be obtained. Furthermore, even for devices that can be magnetized, the device is large and the cost of magnetization is high.
本発明は以上の問題を解決するもので、その目的は基本
組成がＲ−Ｆｅ−Ｂからなる希土類磁石を低い着磁磁場
で飽和着磁をさせることである。The present invention is intended to solve the above problems, and its purpose is to saturately magnetize a rare earth magnet whose basic composition is R-Fe-B with a low magnetizing magnetic field.
本発明は、基本組成がＲ−Ｆｅ−Ｂからなる樹脂結合型
希土類磁石において、着磁を５０〜２００℃に加熱し大
状態で行うことを特徴とする。The present invention is characterized in that a resin-bonded rare earth magnet having a basic composition of R-Fe-B is magnetized in a large state by heating to 50 to 200°C.
基本組成がＲ−Ｆｅ−Ｂからなる希土類磁石はｉ Ｈｃ
の温度係数が大きく、温度の上昇によるｉＨｃの低下の
度合が大きい。従って、磁石を加熱すればｉＨｃを低下
させることができ、低い着磁磁場で着磁することができ
る。特に、１ＨＣ＝８ｋｏｅ以上の場合にその効果が大
きくなる。また、本発明の着磁方法は磁性粉末の特性を
利用していることから圧粉成形、射出成形、カレンダー
ロール等、全ての機械的成形方法によって得られた磁石
に応用できる。A rare earth magnet whose basic composition is R-Fe-B is iHc
The temperature coefficient of is large, and the degree of decrease in iHc due to temperature rise is large. Therefore, by heating the magnet, iHc can be lowered, and magnetization can be achieved with a low magnetizing magnetic field. In particular, the effect becomes greater when 1HC=8koe or more. Further, since the magnetization method of the present invention utilizes the characteristics of magnetic powder, it can be applied to magnets obtained by all mechanical forming methods such as powder molding, injection molding, and calender roll.
ここで、温度範囲を５０〜２００℃としたのは５０℃以
下ではｉＨｃの低下量が少なく着磁の困難さが変わらな
いためである。また、上限を２００℃としたのは２００
° Ｃ以上ではバインダーであるを板物樹脂が変質して
磁石の機械的強度が劣化するためである。Here, the reason why the temperature range is set to 50 to 200°C is that below 50°C, the amount of decrease in iHc is small and the difficulty of magnetization does not change. Also, the upper limit was set to 200℃.
This is because if the temperature exceeds °C, the binder plate resin changes in quality and the mechanical strength of the magnet deteriorates.
実施例
急冷薄帯法によって得られたＮｄ−Ｆｅ−Ｂ粉末（ｉＨ
ｃ＝１２ｋｏｅ）にエポキシ樹脂。２ｗｔ％を加え混練
した後、成形圧３ｔｏｎ／ｃｍ’リング状（外径１４ｍ
ｍ１内径１０ｍｍ５厚さ４ｍｍ）の磁石を成形した。成
形後、１５０℃で２ｈ焼成して樹脂を硬化させサンプル
を得た。Example Nd-Fe-B powder (iH
c=12koe) with epoxy resin. After adding 2 wt% and kneading, a molding pressure of 3 ton/cm' was applied to form a ring (outer diameter 14 m).
A magnet of m1 inner diameter 10 mm 5 thickness 4 mm was molded. After molding, the resin was baked at 150° C. for 2 hours to harden the resin to obtain a sample.
次に、磁石と着磁ヨークをそれぞれ５０° Ｃ１１００
° Ｃ１１２０” ｃ、ｔ５ｏ° Ｃに加熱し、加熱状
態で８［ｆｉ磁を行った。最後に室温で各サンプルのフ
ラックスを測定した。尚、比較例として加熱しないで着
磁したものについてもフラックス測定を行づた。Next, the magnet and magnetizing yoke were each set at 50° C1100.
The sample was heated to 1120°C, t5o°C, and subjected to 8[fi magnetization] in the heated state.Finally, the flux of each sample was measured at room temperature.Furthermore, as a comparative example, the flux of the sample magnetized without heating was also measured. Measurement was carried out.
第１図は加熱しないで着磁したサンプルのフラックスの
値を１００としたときの、各着磁温度でのフラックスの
相対値を示したものである。第１図に示す様に室温と１
２０° Ｃ，１５０℃では、約２５％の性能差があり、
室温では飽和着磁されていないものが１２０℃以上に加
熱して着磁・することによって飽和着磁されることがわ
かる。FIG. 1 shows the relative values of flux at each magnetization temperature, assuming that the flux value of a sample magnetized without heating is 100. As shown in Figure 1, room temperature and 1
There is a performance difference of about 25% at 20°C and 150°C.
It can be seen that something that is not saturated magnetized at room temperature becomes saturated magnetized by heating it to 120° C. or higher and magnetizing it.
実施例 ２
実施例１と同様に磁石サンプル（外径２４ｍｍ内径２０
ｍ ｍ Ｎ厚さ４ｍｍ）を作り室温、５０゜Ｃ，１０
０° Ｃ１１２０° Ｃ，１５０° Ｃ１１８０℃でそ
れぞれ４８極の着磁を行いフラックスの測定を行った。Example 2 A magnet sample (outer diameter 24 mm, inner diameter 20 mm) was prepared in the same manner as in Example 1.
M m N thickness 4 mm) was prepared at room temperature, 50°C, 10
48 poles were magnetized at 0°C, 1120°C, and 150°C, 1180°C, respectively, and the flux was measured.
室温のフラックス値を１００として各温度の値を第２図
に示した。The values at each temperature are shown in FIG. 2, with the flux value at room temperature being 100.
第２図より、室温に比べて１５０℃１１８０℃の値は約
４０％あがっていることがわかる。From FIG. 2, it can be seen that the value at 150°C and 1180°C is approximately 40% higher than at room temperature.
実施例 ３
実施例１と同形状のサンプルを射出成形法のより作り、
室温、５０℃，１００℃，１２０゜Ｃでそれぞれ４８極
の着磁を行いフラックスの測定を行った。室温の値を１
００として各温度の値を第３図に示した。Example 3 A sample with the same shape as Example 1 was made by injection molding,
The flux was measured by magnetizing 48 poles at room temperature, 50°C, 100°C, and 120°C. The value of room temperature is 1
The values of each temperature are shown in FIG.
第３図より、室温に比べて１００° Ｃ１１２０” Ｃ
の値は約２５％〜３０％上がっていることが分かる。From Figure 3, 100° C1120” C compared to room temperature
It can be seen that the value has increased by about 25% to 30%.
以上述べてきたように、本発明によって従来困難であっ
たＮｄ−Ｆｅ−Ｂ系磁石の多極着磁が容易に行うことが
できるようになり、Ｎｄ−Ｆｅ−Ｂ系磁石の各種ステッ
プモータへの応用が可能となった。As described above, the present invention makes it possible to easily perform multi-pole magnetization of Nd-Fe-B magnets, which was difficult in the past, and to apply Nd-Fe-B magnets to various step motors. became possible to apply.
第１図は８極看磁の場合の着磁温度とフラックス量の相
関図。
第２図は４８極看磁の場合の着磁畠度とフラックス量の
相関図。
第３図は射出成形磁石の４８極着磁の場合の着磁温度の
フラックス量の相関図。
以 上
出願人 セイコーエプソン株式会社Figure 1 is a correlation diagram between magnetization temperature and flux amount in the case of 8-pole magnetization. Figure 2 is a correlation diagram between magnetization density and flux amount in the case of 48-pole magnetization. FIG. 3 is a correlation diagram of flux amount and magnetization temperature in the case of 48-pole magnetization of an injection molded magnet. Applicant: Seiko Epson Corporation
Claims (2)
ロン（Ｂ）からなる磁性粉末にバインダーとして有機物
樹脂を加え成形した磁石において、着磁を５０〜２００
℃に加熱した状態で行うことを特徴とした希土類磁石の
着磁方法。(1) In a magnet formed by adding an organic resin as a binder to magnetic powder whose basic composition is rare earth metal (R), iron (Fe), and boron (B), the magnetization is 50 to 200%.
A method for magnetizing rare earth magnets, which is characterized in that it is carried out in a state heated to ℃.
）ニッケル（Ｎｉ）などの遷移金属で置換した第１項記
載の希土類磁石の着磁方法。(2) Part of the iron is cobalt (Co) manganese (Mn)
) A method for magnetizing a rare earth magnet according to item 1, in which the rare earth magnet is substituted with a transition metal such as nickel (Ni).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3219888A JPH01206608A (en) | 1988-02-15 | 1988-02-15 | How to magnetize rare earth magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3219888A JPH01206608A (en) | 1988-02-15 | 1988-02-15 | How to magnetize rare earth magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01206608A true JPH01206608A (en) | 1989-08-18 |
Family
ID=12352207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3219888A Pending JPH01206608A (en) | 1988-02-15 | 1988-02-15 | How to magnetize rare earth magnets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01206608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026048466A1 (en) * | 2024-08-29 | 2026-03-05 | 株式会社デンソー | Magnetizing device |
-
1988
- 1988-02-15 JP JP3219888A patent/JPH01206608A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026048466A1 (en) * | 2024-08-29 | 2026-03-05 | 株式会社デンソー | Magnetizing device |
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