JPH071730B2 - Composite magnet and manufacturing method thereof - Google Patents
Composite magnet and manufacturing method thereofInfo
- Publication number
- JPH071730B2 JPH071730B2 JP2083665A JP8366590A JPH071730B2 JP H071730 B2 JPH071730 B2 JP H071730B2 JP 2083665 A JP2083665 A JP 2083665A JP 8366590 A JP8366590 A JP 8366590A JP H071730 B2 JPH071730 B2 JP H071730B2
- Authority
- JP
- Japan
- Prior art keywords
- metal
- capsule
- permanent magnet
- magnet
- composite
- 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 - Fee Related
Links
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- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、中心軸線に平行な境界面によって粉末冶金
的手段によって製造された永久磁石と他の金属部材とが
複合されている磁石、特に磁気センサー用の複合磁石
と、その製造方法とに関するものである。Description: TECHNICAL FIELD The present invention relates to a magnet in which a permanent magnet manufactured by powder metallurgical means and another metal member are combined with each other by a boundary surface parallel to the central axis, particularly, a magnet. The present invention relates to a composite magnet for a magnetic sensor and a manufacturing method thereof.
磁性体の接近や通過を検出するセンサーとして、複合磁
石と磁気半導体素子とを組合わせたものが知られてお
り、この複合磁石としては、例えば高透磁率の軟磁性材
料の両面に永久磁石材料を貼合わせたものが用いられて
いる。そして、永久磁石として強力な残留磁気を要求さ
れる場合には、例えば、Mn−Al−C系合金を粉末冶金的
手段で成形したものなどが用いられる。As a sensor for detecting the approach or passage of a magnetic material, a combination of a composite magnet and a magnetic semiconductor element is known. Examples of the composite magnet include, for example, a soft magnetic material having a high magnetic permeability and a permanent magnetic material on both sides. The one that is pasted is used. When a strong residual magnetism is required as the permanent magnet, for example, a Mn-Al-C alloy molded by powder metallurgical means is used.
〔発明が解決しようとする課題〕 上述のような貼合わせによる複合磁石を製造するには、
各貼合わせ面に高精度の仕切加工を施す必要があり、そ
の製造が著しく非能率的であった。これに加え、永久磁
石材料の溶接、ろう接、機械加工などが困難なために、
ヨークや支持部材などを取付けようとする場合も接着剤
によらざるを得ず、その結果耐振性や耐衝撃性に問題を
発生していた。[Problems to be Solved by the Invention] In order to manufacture a composite magnet by laminating as described above,
It was necessary to perform a highly accurate partitioning process on each bonding surface, and the production was extremely inefficient. In addition to this, it is difficult to weld, braze, and machine permanent magnet materials,
When attaching a yoke, a supporting member, or the like, it is unavoidable to use an adhesive, resulting in problems in vibration resistance and impact resistance.
この発明は、各材料ごとの仕上加工を不要にして製造能
率を高め、かつ、ヨークや支持部材を溶接、ろう接、機
械加工などの耐振性、耐衝撃性の高い手段によって取付
けることが可能な複合磁石を得ようとするものである。INDUSTRIAL APPLICABILITY The present invention makes it possible to increase the manufacturing efficiency by eliminating the finishing process for each material, and to attach the yoke and the supporting member by means of high vibration resistance and impact resistance such as welding, brazing and machining. It is intended to obtain a composite magnet.
この発明による複合磁石は、十分な強度及び展性を有す
る金属よりなる筒形の外殻内に、複数個の材料が、上記
外殻内壁面に密着し、かつ互に境界面において密着した
状態で保持されている。ここで、上記境界面は上記外殻
の中心軸線に事実上平行であり、上記材料は永久磁石金
属と非永久磁石金属とからなっており、これらの金属材
料は何れも充実質である。The composite magnet according to the present invention has a state in which a plurality of materials are in close contact with the inner wall surface of the outer shell and in a boundary surface of each other in a cylindrical outer shell made of a metal having sufficient strength and malleability. Is held in. Here, the boundary surface is substantially parallel to the central axis of the outer shell, the material is made of a permanent magnet metal and a non-permanent magnet metal, and all of these metal materials are solid.
このような複合磁石は、次のようにして製造する。先
ず、十分な強度及び展性を有する金属よりなる筒形のカ
プセル内に、充実質の非永久磁石材料からなる仕切りを
挿入して、カプセル内を仕切る。この仕切りは、カプセ
ルの中心軸線に平行な表面を有している。そして、カプ
セル内の仕切られた空間に金属の充実質または粉末材料
を充填するが、少なくとも一つの空間には永久磁石粉末
材料を充填する。次に、材料を充填したカプセルを封止
し、これをビレットとして熱間または温間押出加工を行
い、径が縮小された押出材を得る。最後に、この押出材
を所定の長さに切断して、製品である複合磁石を得る。Such a composite magnet is manufactured as follows. First, a partition made of a solid non-permanent magnet material is inserted into a cylindrical capsule made of metal having sufficient strength and malleability to partition the inside of the capsule. This partition has a surface parallel to the central axis of the capsule. Then, the partitioned space in the capsule is filled with a solid metal or powder material, and at least one space is filled with a permanent magnet powder material. Next, the capsule filled with the material is sealed, and hot or warm extrusion is performed using this as a billet to obtain an extruded material having a reduced diameter. Finally, this extruded material is cut into a predetermined length to obtain a product composite magnet.
上述の製造過程において、カプセル内に充填した金属粉
末材料は、押出加工時に充実質に変化し、カプセルから
移行した外殻と仕切りの表面に高度に密着する。また、
カプセル内に挿入した仕切りは、押出加工時にカプセル
と共に伸延されるが、その表面はカプセルから移行した
外殻の中心軸線にほぼ平行な状態を保ち続ける。In the above-mentioned manufacturing process, the metal powder material filled in the capsule is changed into a solid material during the extrusion process, and highly adheres to the outer shell transferred from the capsule and the surface of the partition. Also,
The partition inserted into the capsule is stretched together with the capsule during the extrusion process, but the surface thereof continues to be substantially parallel to the central axis of the outer shell transferred from the capsule.
従って、これを切断して得た複合磁石は、筒形外殻内に
おいて、粉末材料から移行した充実質の金属材料と、仕
切り等から移行した金属材料とが、外殻の中心軸線にほ
ぼ平行な境界面において高度に密着しており、これら材
料の中には永久磁石材料が含まれている。Therefore, in the composite magnet obtained by cutting this, the solid metal material transferred from the powder material and the metal material transferred from the partition etc. are almost parallel to the central axis of the outer shell in the cylindrical outer shell. These materials have a high degree of close contact with each other, and include permanent magnet materials among these materials.
よって、各材料ごとの仕上加工は不要で、接着剤を用い
ていないにも拘らず各材料が分離することがなく、押出
材を切断するだけで所定の寸法の製品が得られるため、
その製造能率が極めて高い。また、外殻に溶接、ろう
接、機械加工などによって、ヨークや支持部材などを取
付けることができるため、耐振性や耐衝撃性が高い最終
製品を得ることができる。Therefore, finishing processing for each material is unnecessary, each material does not separate even though no adhesive is used, and a product with a predetermined size can be obtained only by cutting the extruded material,
Its manufacturing efficiency is extremely high. Further, since the yoke, the supporting member and the like can be attached to the outer shell by welding, brazing, machining or the like, a final product having high vibration resistance and impact resistance can be obtained.
〔実施例〕 実施例1 第1図(a)のように、円筒形カプセル1内に仕切り2
を挿入し、仕切られた空間内に金属粉末3、3を充填
し、蓋4を溶接すると共に内部を排気してビレット5を
製作する。各部の材質及び寸法は次の通りである。6は
カプセル1の中心軸線である。Example 1 Example 1 As shown in FIG. 1 (a), a partition 2 is placed inside a cylindrical capsule 1.
Then, the metal powders 3 are filled in the partitioned space, the lid 4 is welded, and the inside is evacuated to manufacture the billet 5. The materials and dimensions of each part are as follows. 6 is a central axis of the capsule 1.
カプセル1 材質:SUS304 寸法:外径33mm、内径29mm、底厚5mm、 凹所深さ40mm 仕切り2 材質:45パーマロイ 寸法:厚さ1.5mm 金属粉末3 材質:MnAlC系永久磁石合金 蓋4 材質:SUS304 寸法:直径33mm、厚さ5mm 上記ビレット5を700℃に加熱し熱間押出加工を実施し
て第1図(b)に示す直径16.3mm、長さ145mmのき熱間
押出材7を得た。その中央のクラッド部分8の長さは10
9mmで、カプセルの底1a及び蓋4に由来する両端部分
9、9の長さはそれぞれ約18mmであった。Capsule 1 Material: SUS304 Dimension: Outer diameter 33mm, Inner diameter 29mm, Bottom thickness 5mm, Recess depth 40mm Partition 2 Material: 45 Permalloy Dimension: Thickness 1.5mm Metal powder 3 Material: MnAlC series permanent magnet alloy Lid 4 Material: SUS304 Dimensions: diameter 33 mm, thickness 5 mm The billet 5 was heated to 700 ° C. and hot extruded to obtain a hot extruded material 7 with a diameter of 16.3 mm and a length of 145 mm shown in FIG. 1 (b). . The length of the central cladding 8 is 10
The length of both end portions 9, 9 originating from the bottom 1a of the capsule and the lid 4 was about 18 mm.
上述の押出材7を長さ10.0mmに切断することにより、第
1図(c)に縦断面を示し同図(d)に横断面を示す複
合磁石10を得ることができる。この複合磁石10は、厚さ
1.2mmの45パーマロイよりなる仕切り11の両側に、MnAlC
系合金の永久磁石12、13が密着しており、これらの周囲
に非磁性材であるSUS304材の円筒形の外殻14が密着して
いて仕切り11と永久磁石12、13との境界面は中心軸線15
に平行である。By cutting the above-mentioned extruded material 7 into a length of 10.0 mm, a composite magnet 10 having a longitudinal section in FIG. 1 (c) and a transverse section in FIG. 1 (d) can be obtained. This composite magnet 10 is
On both sides of partition 11 made of 1.2 mm 45 permalloy, MnAlC
The permanent magnets 12 and 13 of the system alloy are in close contact with each other, and the cylindrical outer shell 14 of SUS304 material which is a non-magnetic material is in close contact with them, and the boundary surface between the partition 11 and the permanent magnets 12 and 13 is Central axis 15
Parallel to.
第2図は上記複合磁石10を用いた磁気センサーを示す。
永久磁石12と13とは図示のように互いに反対方向に磁化
されており、複合磁石10の一端面には45パーマロイで作
ったヨーク16が設けられ、外殻14に溶接されている。1
7、17はヨーク16に穿設した取付螺孔である。複合磁石1
0の他端面に接近して磁気半導体素子18を配置するとき
は、矢印19、20方向に物体21が移動したとき、素子18に
検出信号が現われる。FIG. 2 shows a magnetic sensor using the composite magnet 10.
The permanent magnets 12 and 13 are magnetized in opposite directions as shown in the figure, and a yoke 16 made of 45 permalloy is provided on one end surface of the composite magnet 10 and welded to the outer shell 14. 1
Reference numerals 7 and 17 denote mounting screw holes formed in the yoke 16. Composite magnet 1
When the magnetic semiconductor element 18 is arranged close to the other end surface of 0, a detection signal appears in the element 18 when the object 21 moves in the directions of arrows 19 and 20.
第3図に示す実施例では、ヨーク16を外殻14に溶接する
代りに、外殻14に加工したねじ22にヨーク16が螺合され
ている。In the embodiment shown in FIG. 3, instead of welding the yoke 16 to the outer shell 14, the yoke 16 is screwed to the screw 22 processed on the outer shell 14.
実施例2 実施例1におけるSUS304材製のカプセル1及び蓋4に代
えて、真鍮製のカプセル1及び蓋4を使用し、底1aの厚
さだけを15mmとした。これ以外の事項は、すべて実施例
1と同じである。なお、底1aを厚くした理由は、700℃
での熱間押出加工時に、真鍮が極めて軟らかくなって、
カプセル1の側壁部分1bまでが永久磁石材料3、3に先
立ってダイイスから絞り出される傾向があるが、厚肉の
底1a側からダイスを通過させれば、永久磁石材料3、3
が円滑にダイス内に導入されるためである。Example 2 Instead of the capsule 1 and the lid 4 made of the SUS304 material in Example 1, the capsule 1 and the lid 4 made of brass were used, and only the thickness of the bottom 1a was set to 15 mm. All other matters are the same as in Example 1. The reason for thickening the bottom 1a is 700 ° C.
The brass becomes extremely soft during hot extrusion at
The capsule 1 has a tendency to be squeezed out from the die before the side wall portion 1b of the permanent magnet materials 3 and 3, but if the die is passed through from the thick bottom 1a side, the permanent magnet materials 3 and 3 are formed.
Is smoothly introduced into the die.
この実施例による製品では、真鍮製の外殻14が、内部の
仕切り11、永久磁石12及び13の外周面に溶着して、極め
て高い強度で一体化される。In the product according to this embodiment, the brass outer shell 14 is welded to the inner partition 11 and the outer peripheral surfaces of the permanent magnets 12 and 13 to be integrated with extremely high strength.
このほか、両実施例とも第4図に示すような外殻41、軟
磁性材料42、42・・・・および永久磁石材料43、43・・
・・からなる各種の形状の複合磁石の製造に応用するこ
とができる。In addition, the outer shell 41, the soft magnetic materials 42, 42 ... And the permanent magnet materials 43, 43 ... As shown in FIG.
.. can be applied to the production of composite magnets of various shapes.
以上の実施例によって明らかなように、この発明によれ
ば、粉末原料塑性加工による金属永久磁石をその一部に
含む複合磁石を極めて能率良く製造することができ、し
かもその複合磁石は溶接、ろう接、機械加工などが容易
で、耐振性や耐衝撃性に勝れている。As is clear from the above examples, according to the present invention, it is possible to extremely efficiently manufacture a composite magnet including a metal permanent magnet as a part of the powder raw material plastic working, and the composite magnet is welded or brazed. It is easy to contact and machine, and has excellent vibration resistance and impact resistance.
第1図はこの発明の実施例における製造過程を説明する
縦断面図、第2図及び第3図は同実施例による製品の加
工例を示す断面図で、第4図は断面形状を異にする各種
実施例製品の横断面図である。 1……カプセル、2……仕切り、3……金属粉末、4…
…蓋、6……中心軸線、7……熱間押出材、10……複合
磁石、11……仕切り、12及び13……永久磁石、14……外
殻、15……中心軸線、41……外殻、42……軟磁性材料、
43……永久磁石。FIG. 1 is a vertical sectional view for explaining a manufacturing process in an embodiment of the present invention, FIGS. 2 and 3 are sectional views showing a processing example of a product according to the same embodiment, and FIG. It is a cross-sectional view of various examples of products. 1 ... Capsule, 2 ... Partition, 3 ... Metal powder, 4 ...
... Lid, 6 ... Central axis, 7 ... Hot extruded material, 10 ... Composite magnet, 11 ... Partition, 12 and 13 ... Permanent magnet, 14 ... Outer shell, 15 ... Central axis, 41 ... … Outer shell, 42… Soft magnetic material,
43 …… Permanent magnet.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高須 一郎 兵庫県姫路市飾磨区中島字一文字3007番地 山陽特殊製鋼株式会社内 (72)発明者 黒田 直人 兵庫県姫路市飾磨区中島字一文字3007番地 山陽特殊製鋼株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ichiro Takasu 3007 Nakajima, Shikama-ku, Himeji, Hyogo Prefecture Sanyo Special Steel Co., Ltd. Special Steel Co., Ltd.
Claims (2)
筒形の外殻内に、少なくともその1つは粉末原料を塑性
加工により充実質化させた金属永久磁石材料である複数
種類の金属材料が存在しており、これらの材料は、上記
筒の中心軸線にほぼ平行な境界面において互に密接して
いることを特徴とする複合磁石。1. A plurality of kinds of metals, each of which is a metal permanent magnet material, in which at least one of which is a powder raw material is enriched by plastic working in a cylindrical outer shell made of a metal having sufficient strength and malleability. A composite magnet, wherein materials are present and these materials are in close contact with each other at a boundary surface substantially parallel to the central axis of the cylinder.
筒形カプセル内に、このカプセルの中心軸線に平行な表
面を持った充実質金属よりなる仕切りを挿入し、残存空
間の少なくとも一つに永久磁石金属の粉末材料を充填す
ると共に、残余の残存空間に適宜の金属の粉末または充
実質金属材料を収容し、このカプセルを密閉して熱間ま
たは温間押出加工を施し、得られた押出材を所定の長さ
に切断することを特徴とする複合永久磁石の製造方法。2. A partition made of solid metal having a surface parallel to the central axis of the capsule is inserted into a cylindrical capsule made of metal having sufficient strength and malleability, and at least one of the remaining spaces. Was filled with a powder material of a permanent magnet metal, and a powder of a suitable metal or a solid metal material was housed in the remaining space, and the capsule was sealed and subjected to hot or warm extrusion processing. A method for producing a composite permanent magnet, which comprises cutting an extruded material into a predetermined length.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2083665A JPH071730B2 (en) | 1990-03-29 | 1990-03-29 | Composite magnet and manufacturing method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2083665A JPH071730B2 (en) | 1990-03-29 | 1990-03-29 | Composite magnet and manufacturing method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03283407A JPH03283407A (en) | 1991-12-13 |
JPH071730B2 true JPH071730B2 (en) | 1995-01-11 |
Family
ID=13808760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2083665A Expired - Fee Related JPH071730B2 (en) | 1990-03-29 | 1990-03-29 | Composite magnet and manufacturing method thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH071730B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6454993B1 (en) | 2000-01-11 | 2002-09-24 | Delphi Technologies, Inc. | Manufacturing technique for multi-layered structure with magnet using an extrusion process |
JP4538166B2 (en) * | 2001-06-12 | 2010-09-08 | 信越化学工業株式会社 | Magnetic sensor |
CN103915233B (en) * | 2013-01-05 | 2017-02-08 | 江苏多维科技有限公司 | Permanent magnet suitable for magnetic angle encoder |
-
1990
- 1990-03-29 JP JP2083665A patent/JPH071730B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03283407A (en) | 1991-12-13 |
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