JPS5941840B2 - Magnetic field press device - Google Patents
Magnetic field press deviceInfo
- Publication number
- JPS5941840B2 JPS5941840B2 JP53161583A JP16158378A JPS5941840B2 JP S5941840 B2 JPS5941840 B2 JP S5941840B2 JP 53161583 A JP53161583 A JP 53161583A JP 16158378 A JP16158378 A JP 16158378A JP S5941840 B2 JPS5941840 B2 JP S5941840B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- coil
- impact
- powder
- 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.)
- Expired
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 44
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/008—Applying a magnetic field to the material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Press Drives And Press Lines (AREA)
Description
【発明の詳細な説明】
本発明は永久磁石や強磁性体等の磁性材料をプレス成型
するのに改良された装置に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved apparatus for press molding magnetic materials such as permanent magnets and ferromagnetic materials.
即ち本発明は得られる磁性材料の磁気特性を向上させる
とともに、簡単に短時間にプレスできることを目的とし
て提案されたものである。That is, the present invention was proposed for the purpose of improving the magnetic properties of the obtained magnetic material and making it possible to press the material easily and in a short time.
従来のプレス装置は第１図に示すように、ステンレス等
でできた型１内に充填された粉末を上下のカロ圧パンチ
２、３で、もしくはその一方でカロ圧し、そのときＮ、
Ｓ磁極を対向した磁場形成装置４で所要の磁場を形成作
用させながら磁場中でブレスするが、前記磁場形成装置
４はコイル５に直流電源６で励磁し直流静磁場を作用す
るようにしたものである。As shown in Fig. 1, a conventional press device presses the powder filled in a mold 1 made of stainless steel or the like with upper and lower Caro pressure punches 2 and 3, or with one of them, and then presses the powder with N, N,
Brace is performed in a magnetic field while forming a required magnetic field with a magnetic field forming device 4 having S magnetic poles facing each other, and the magnetic field forming device 4 has a coil 5 excited by a DC power source 6 to apply a DC static magnetic field. It is.
直流静磁場による異方性処理効果は少なく、そのため長
時間処理と、強い磁場を形成するコイルと、大容量直流
電源を必要とする。本発明は前記従来の静磁場に対して
衝撃磁場、即ちコイルに衝撃電流を流すことにより発生
する磁場で、磁場傾度−の高い強い変化磁場を作用させ
ることによつて、処理時間を短縮し、材料の磁気特性を
著しく向上せしめ得たものである。The effect of anisotropy processing using a DC static magnetic field is small, and therefore requires long processing times, a coil that generates a strong magnetic field, and a large-capacity DC power supply. The present invention shortens the processing time by applying a strong changing magnetic field with a high magnetic field gradient to the conventional static magnetic field, that is, a magnetic field generated by passing an impact current through a coil. This significantly improved the magnetic properties of the material.
以下一実施例図により説明する。ブレス装置は第１図の
ように構成されるが、磁場を発生するコイル、及び励磁
電源回路は第２図のように構成される。Ｔは磁場を発生
するコイル、８は衝撃蓄電器で、直流電源９によつて充
電される。１０は真空スイッチで、蓄電器８とコイルＴ
を結ぶ放電回路に挿入され、放電起動スイッチを作用す
る。An embodiment will be explained below with reference to drawings. The breath device is constructed as shown in FIG. 1, but the coil that generates the magnetic field and the excitation power supply circuit are constructed as shown in FIG. 2. T is a coil that generates a magnetic field, and 8 is an impact capacitor, which is charged by a DC power source 9. 10 is a vacuum switch, capacitor 8 and coil T
It is inserted into the discharge circuit that connects the battery, and acts as a discharge start switch.
衝撃蓄電器８による放電は短時間に行なわれ、−の大き
い、したがつて波高値の極めて大きい本電流が衝撃的に
流れ、起動スイッチ１０によつてコイルＴに流通する。Discharge by the impact capacitor 8 is carried out in a short time, and the main current having a large negative value and therefore an extremely large peak value flows impulsively, and is passed through the coil T by the starting switch 10.
これによりコイルＴは磁位傾度−の大きい、しかも電流
に比例して極めて大きい磁界強度Ｈの衝撃磁場を発生し
プレスされる粉末に作用する。As a result, the coil T generates an impact magnetic field with a large magnetic potential gradient - and an extremely large magnetic field strength H in proportion to the current, which acts on the powder being pressed.
したがつて磁性粉末はこの強力磁場による磁気駆動を受
けて結晶軸が揃えられ配列整揃が容易に行なわれ、高効
率をもつて作用されるので、極く短時間に所期の磁場プ
レスを完成させることができる。これは従来直流静磁場
でプレスしていたのに比較して衝撃磁場の作用により約
一以下の時間で正確に且つ充分にプレスすることができ
る。Therefore, the magnetic powder is magnetically driven by this strong magnetic field, and the crystal axes are aligned, alignment is easily achieved, and the magnetic powder is operated with high efficiency, allowing the desired magnetic field pressing to be carried out in an extremely short time. can be completed. Compared to the conventional method of pressing using a direct current static magnetic field, the effect of the impact magnetic field allows for accurate and sufficient pressing in about one or less time.
そして直流電源９は時間をかけて蓄電器８を充電すれば
よいから、従来の直接コイルを励磁するための電源６に
比べて小容量のものでもよく、小型に構成できる。衝撃
プレスは通常１回では間合ず、数回に分けて、蓄電器８
を充電しコイル７にスイツチ１０放電することを繰返し
て行なうが、この総和の時間が前記のように著しく短時
間で処理することができるものである。Since the DC power supply 9 only needs to charge the capacitor 8 over time, it may have a smaller capacity than the conventional power supply 6 for directly exciting the coil, and can be configured to be compact. Normally, the impact press cannot be done in one time, but it is divided into several times and the capacitor 8 is
The process of charging the coil 7 and discharging the switch 10 to the coil 7 is repeated, but the total time can be extremely short as described above.
そしてプレスされた成品の磁気特性は前記のように磁区
結晶の充分な整揃処理により極めて強力なものが得られ
る。例えばＳｍ，ＣＯ，Ｃｕ，Ｆｅ，Ｚｒの５μφの粉
末を４２０ｔ）Ｓｍ−４５％ＣＯ−５（ｆｌ）Ｃｕ−７
％Ｆｅ−１％Ｚｒの割合で混合したものを磁場プレスす
るとき、１００Ｋ０ｅの衝撃磁場を１５回加えてプレス
した成形品を焼結した磁石は最大エネルギー積が２７Ｍ
Ｇ０ｅが得られた。The magnetic properties of the pressed product can be extremely strong due to the sufficient alignment of the magnetic domain crystals as described above. For example, 5μφ powder of Sm, CO, Cu, Fe, Zr is 420t)Sm-45%CO-5(fl)Cu-7
When a mixture of %Fe-1%Zr is pressed in a magnetic field, the maximum energy product of the magnet obtained by sintering the pressed molded product by applying an impact magnetic field of 100K0e 15 times is 27M.
G0e was obtained.
これは従来のものが５〜９ＭＧ０ｅであるのに比較して
４〜５倍の特性向上である。This is a 4 to 5 times improvement in characteristics compared to the conventional one, which has 5 to 9 MG0e.
第３図は蓄電器８に直列に結合コイル１１を挿入し高周
波電源１２を結合したもので、蓄電器８の放電時に高周
波を重畳した衝撃電流をコイル７に加えそれにより発生
する磁場を粉末に作用させることができ、これによりプ
レス効果はより一層高まり、処理時間の短縮と磁気特性
の向上に効果が顕著となる。Figure 3 shows a capacitor 8 with a coupling coil 11 inserted in series and coupled with a high-frequency power source 12. When the capacitor 8 is discharged, a shock current with a high frequency superimposed is applied to the coil 7, and the resulting magnetic field acts on the powder. As a result, the pressing effect is further enhanced, and the effect of shortening processing time and improving magnetic properties becomes remarkable.
なお以上は本発明を一実施例によつて説明したが、衝撃
磁場を発生するコイルは磁気鉄心のフイールドシエーパ
一の作用により集中的に磁場作用することができるが、
衝撃的に作用させる場合は鉄心を心ずしも必要ではなく
、空心コイルで衝撃磁場を作用できる。Although the present invention has been explained above by way of one embodiment, the coil that generates the impact magnetic field can act on the magnetic field intensively by the action of the field shaper of the magnetic core.
When applying an impulsive magnetic field, it is not necessary to center the iron core, and an air-core coil can be used to apply an impulsive magnetic field.
また前記した実施例のようにプレス品を焼結する場合、
この焼結中にも磁場を作用しながら行なうことが成品の
磁気特性向上に効果があるが、前記作用磁場も静的磁場
より衝撃磁場を作用することの方が効果が大きい。In addition, when sintering a pressed product as in the above embodiment,
It is effective to improve the magnetic properties of the product by applying a magnetic field during this sintering, but it is more effective to apply an impact magnetic field than a static magnetic field.
第１図は従来例の構成図、第２図は本発明の一実施例要
部回路図、第３図は他の実施例回路図である。
１は型、２，３はパンチ、４は磁場発生装置、５，７は
コイル、８は衝撃蓄電器、９は直流電源、１０は起動ス
イツチ、１１は結合コイル、１２は高周波電源である。FIG. 1 is a block diagram of a conventional example, FIG. 2 is a circuit diagram of a main part of an embodiment of the present invention, and FIG. 3 is a circuit diagram of another embodiment. 1 is a mold, 2 and 3 are punches, 4 is a magnetic field generator, 5 and 7 are coils, 8 is an impact capacitor, 9 is a DC power supply, 10 is a starting switch, 11 is a coupling coil, and 12 is a high frequency power supply.
Claims (1)
加圧するパンチと、前記加圧される型内充填粉末に磁場
を加えるコイルと、該コイルに起動スイッチのオン・オ
フにより衝撃電流を供給する電源装置とを設け、前記型
内充填粉末に衝撃電流による磁場を加えながら前記パン
チによりプレスするようにしたことを特徴とする磁場プ
レス装置。 ２ コイルに起動スイッチのオン・オフにより衝撃電流
を供給する衝撃蓄電器からなる電源装置を設けた特許請
求の範囲第１項に記載の磁場プレス装置。 ３ コイルに起動スイッチのオン・オフにより高周波重
畳衝撃電流を供給する衝撃蓄電器及び高周波電源からな
る電源装置を設けた特許請求の範囲第１項に記載の磁場
プレス装置。[Claims] 1. A mold for filling powder of a magnetic material, a punch for pressurizing the filling powder in the mold, a coil for applying a magnetic field to the pressurized filling powder in the mold, and a starting switch for the coil. a power supply device that supplies an impact current by turning on and off the magnetic field pressing device, and the punch presses the powder while applying a magnetic field caused by the impact current to the powder filled in the mold. 2. The magnetic field press device according to claim 1, further comprising a power supply device comprising an impact capacitor that supplies an impact current to the coil by turning on and off a starting switch. 3. The magnetic field press device according to claim 1, wherein the coil is provided with a power supply device consisting of an impact capacitor and a high frequency power source that supply a high frequency superimposed impact current to the coil by turning on and off a starting switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53161583A JPS5941840B2 (en) | 1978-12-28 | 1978-12-28 | Magnetic field press device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53161583A JPS5941840B2 (en) | 1978-12-28 | 1978-12-28 | Magnetic field press device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5588998A JPS5588998A (en) | 1980-07-05 |
| JPS5941840B2 true JPS5941840B2 (en) | 1984-10-09 |
Family
ID=15737875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53161583A Expired JPS5941840B2 (en) | 1978-12-28 | 1978-12-28 | Magnetic field press device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5941840B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1176814A (en) * | 1981-05-11 | 1984-10-30 | Kalatur S. V. L. Narasimhan | Method of improving magnets |
| JPH0612728B2 (en) * | 1981-05-21 | 1994-02-16 | セイコーエプソン株式会社 | Manufacturing method of cylindrical radial anisotropic permanent magnet |
| JPS58200517A (en) * | 1982-05-18 | 1983-11-22 | Mitsubishi Metal Corp | Formation magnetic field of powder |
| JPS58200518A (en) * | 1982-05-18 | 1983-11-22 | Mitsubishi Metal Corp | Formation of magnetic field of powder |
| JPH06224018A (en) * | 1993-12-22 | 1994-08-12 | Hitachi Metals Ltd | Manufacture of r-fe-b-based sintered magnet |
-
1978
- 1978-12-28 JP JP53161583A patent/JPS5941840B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5588998A (en) | 1980-07-05 |
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