WO2014174935A1 - 焼結磁石製造用モールド、及びそれを用いた焼結磁石製造方法 - Google Patents
焼結磁石製造用モールド、及びそれを用いた焼結磁石製造方法 Download PDFInfo
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- WO2014174935A1 WO2014174935A1 PCT/JP2014/057263 JP2014057263W WO2014174935A1 WO 2014174935 A1 WO2014174935 A1 WO 2014174935A1 JP 2014057263 W JP2014057263 W JP 2014057263W WO 2014174935 A1 WO2014174935 A1 WO 2014174935A1
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- WIPO (PCT)
- Prior art keywords
- main body
- cavity
- sintered magnet
- alloy powder
- lid
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- 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
- H01F41/0266—Moulding; Pressing
-
- 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
- H01F41/0273—Imparting anisotropy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0097—Press moulds; Press-mould and press-ram assemblies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/086—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together sintered
Definitions
- the method for producing a sintered magnet according to the present invention comprises: A filling step of filling the alloy powder of the raw material into the sintered magnet manufacturing mold according to the present invention; An orientation step of magnetically orienting the alloy powder by applying a magnetic field without applying pressure to the alloy powder; A sintering step of sintering the alloy powder by heating to a sintering temperature without applying pressure is performed in this order.
- the alloy powder P is heated to a predetermined sintering temperature while being stored in the powder storage space 19 to sinter the alloy powder P (e).
- the sintering temperature may be about 900 to 1050 ° C., for example, when the alloy powder P is of RFeB type.
- the volume of the whole powder decreases, that is, the sintered body shrinks.
- the sintered body naturally contracts toward the lowermost part of the lower cavity 111B according to gravity. Can be prevented.
- the steps of orientation and sintering can be performed with the sintered magnet manufacturing mold 10 stacked vertically as described above being accommodated in the cylindrical outer cylinder 24 as shown in FIG. 6 (b). desirable.
- the radius of the inner wall of the outer cylinder 24 is made to coincide with the radius of curvature of the arc drawn by the chamfered portion 15 of the sintered magnet manufacturing mold 10.
- the saucer 25 which has the hollow 251 which has the same radius as the outer wall of the outer cylinder 24 is provided in the upper surface of a board
- the outer cylinder 24 and the tray 25 are made of the same material as the sintered magnet manufacturing mold 10.
- the sintered magnet production mold 30 of the second embodiment is a mold used in the PLP method, and can produce a plurality of arcuate plate magnets from one mold. As shown in FIGS. 8 to 11, the sintered magnet manufacturing mold 30 includes a main body 31 and a lid 32. Both the main body 31 and the lid 32 are made of the same material as the sintered magnet manufacturing mold 10 of the first embodiment.
- a lid 32 By placing the lid 32 on the main body 31 so that the upper surface of the main body surface 310A and the base surface 321A, and the upper surface of the first side cavity 312A and the second side cavity 312B and the lower surface of the convex rib 322 are aligned, A lid 32 is attached. As a result, the convex rib 322 blocks the first side cavity 312A and the second side cavity 312B and the partially cylindrical virtual cavity 313 (shaded portion in FIG. 9) connecting them in the main body cavity 311, and the main body cavity 311. An arcuate plate-shaped powder containing space 39 is formed in the remaining portion (FIG. 11).
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
a) 前記本体が、
a-1) 本体面から内部に設けられた、直方体状の上部キャビティと、その下に連接している下に凸の部分円筒状の下部キャビティとから成る本体キャビティと、
a-2) 前記本体面における前記上部キャビティの開口の、前記部分円筒の軸方向の両外部にそれぞれ、前記本体面から内部に設けられた、前記下部キャビティの部分円筒の軸と平行な軸を有する部分円筒状の側キャビティと
を有し、
b) 前記蓋が、前記本体面に対応する基礎面と、該基礎面から前記2つの側キャビティ及びそれら両側キャビティを接続する部分円筒状の仮想キャビティに対応して突出する凸リブを有する
ことを特徴とする。
この場合、前記本体は、複数個の本体キャビティのうちの少なくとも一部が一方向に並び、該方向に隣接する本体キャビティ間に、共通の側キャビティを備えると共に、前記蓋は、前記一方向に並んだ複数のキャビティの両端間の距離よりも長い部分円筒状の前記凸リブを備えることが望ましい。このような構成においては、複数のキャビティに対して蓋を1個のみを取り付ければよいため、蓋の着脱の手間を少なくすることができる。
原料の合金粉末を本発明に係る焼結磁石製造用モールドに充填する充填工程と、
前記合金粉末に圧力を印加することなく磁界を印加することにより、該合金粉末を磁気配向させる配向工程と、
前記合金粉末に圧力を印加することなく焼結温度まで加熱することにより焼結させる焼結工程と
をこの順で行うことを特徴とする。
11、31…本体
110、310…本体材
110A、310A…本体面
111、311…本体キャビティ
111A、311A…上部キャビティ
111B、311B…下部キャビティ
112…側キャビティ
113、313…仮想キャビティ
12、32…蓋
121、321…上板
121A、321A…基礎面
122、322…凸リブ
15…角取り部
19、39…粉末収容空間
21…当接材
22…空芯コイル
23…ピストン
24…外筒
25…受け皿
251…受け皿の窪み
312A…第1側キャビティ
312B…第2側キャビティ
90…弓形板状磁石
91…凸面
92…凹面
93…長方形側面
94…弓形側面
M…焼結磁石
Claims (5)
- 本体及び蓋を有する焼結磁石製造用モールドであって、
a) 前記本体が、
a-1) 本体面から内部に設けられた、直方体状の上部キャビティと、その下に連接している下に凸の部分円筒状の下部キャビティとから成る本体キャビティと、
a-2) 前記本体面における前記上部キャビティの開口の、前記部分円筒の軸方向の両外部にそれぞれ、前記本体面から内部に設けられた、前記下部キャビティの部分円筒の軸と平行な軸を有する部分円筒状の側キャビティと
を有し、
b) 前記蓋が、前記本体面に対応する基礎面と、該基礎面から前記2つの側キャビティ及びそれら両側キャビティを接続する部分円筒状の仮想キャビティに対応して突出する凸リブを有する
ことを特徴とする焼結磁石製造用モールド。 - 前記本体が、前記本体キャビティを複数個備え、該複数個の本体キャビティのうちの少なくとも一部が一方向に並び、該方向に隣接する本体キャビティ間に、共通の前記側キャビティ備えると共に、
前記蓋が、前記一方向に並んだ複数のキャビティの両端間の距離よりも長い部分円筒状の前記凸リブを備える
ことを特徴とする請求項1に記載の焼結磁石製造用モールド。 - 請求項1又は2に記載の焼結磁石製造用モールドに原料の合金粉末を充填したうえで、前記本体に前記蓋を取り付ける充填工程と、
前記合金粉末に圧力を印加することなく磁界を印加することにより、該合金粉末を磁気配向させる配向工程と、
前記合金粉末に圧力を印加することなく焼結温度まで加熱することにより焼結させる焼結工程と
をこの順で行うことを特徴とする焼結磁石製造方法。 - 前記充填工程において、合金粉末を前記本体キャビティに供給した後、前記凸リブと同形状の当接材を、上方から該合金粉末に当接させることを特徴とする請求項3に記載の焼結磁石製造方法。
- 前記配向工程において、前記蓋を前記本体に付勢するように、前記蓋を押圧することを特徴とする請求項3又は4に記載の焼結磁石製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14788918.2A EP2991086A4 (en) | 2013-04-24 | 2014-03-18 | SINTER MAGNET MANUFACTURING MOLD AND METHOD OF MANUFACTURING SINK MAGNET USING SAID MOLD |
JP2015513615A JPWO2014174935A1 (ja) | 2013-04-24 | 2014-03-18 | 焼結磁石製造用モールド、及びそれを用いた焼結磁石製造方法 |
US14/785,750 US20160104571A1 (en) | 2013-04-24 | 2014-03-18 | Sintered magnet production mold, and sintered magnet production method using the same |
CN201480022697.0A CN105144322A (zh) | 2013-04-24 | 2014-03-18 | 烧结磁体制造用模具以及使用该烧结磁体制造用模具的烧结磁体制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-091174 | 2013-04-24 | ||
JP2013091174 | 2013-04-24 |
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WO2014174935A1 true WO2014174935A1 (ja) | 2014-10-30 |
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PCT/JP2014/057263 WO2014174935A1 (ja) | 2013-04-24 | 2014-03-18 | 焼結磁石製造用モールド、及びそれを用いた焼結磁石製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160104571A1 (ja) |
EP (1) | EP2991086A4 (ja) |
JP (1) | JPWO2014174935A1 (ja) |
CN (1) | CN105144322A (ja) |
WO (1) | WO2014174935A1 (ja) |
Cited By (5)
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---|---|---|---|---|
JP2017028141A (ja) * | 2015-07-24 | 2017-02-02 | 大同特殊鋼株式会社 | 焼結磁石製造方法 |
JP2018082168A (ja) * | 2016-11-09 | 2018-05-24 | Tdk株式会社 | 希土類磁石の製造方法 |
JP2018125478A (ja) * | 2017-02-03 | 2018-08-09 | 大同特殊鋼株式会社 | 希土類焼結磁石製造方法 |
JP2019145747A (ja) * | 2018-02-23 | 2019-08-29 | Tdk株式会社 | 希土類磁石の製造方法 |
JP2020113578A (ja) * | 2019-01-08 | 2020-07-27 | 大同特殊鋼株式会社 | 成形型および磁石材料の成形方法 |
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2014
- 2014-03-18 CN CN201480022697.0A patent/CN105144322A/zh active Pending
- 2014-03-18 EP EP14788918.2A patent/EP2991086A4/en not_active Withdrawn
- 2014-03-18 US US14/785,750 patent/US20160104571A1/en not_active Abandoned
- 2014-03-18 WO PCT/JP2014/057263 patent/WO2014174935A1/ja active Application Filing
- 2014-03-18 JP JP2015513615A patent/JPWO2014174935A1/ja not_active Ceased
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JP2017028141A (ja) * | 2015-07-24 | 2017-02-02 | 大同特殊鋼株式会社 | 焼結磁石製造方法 |
JP2018082168A (ja) * | 2016-11-09 | 2018-05-24 | Tdk株式会社 | 希土類磁石の製造方法 |
JP7056086B2 (ja) | 2016-11-09 | 2022-04-19 | Tdk株式会社 | 希土類磁石の製造方法 |
JP2018125478A (ja) * | 2017-02-03 | 2018-08-09 | 大同特殊鋼株式会社 | 希土類焼結磁石製造方法 |
JP2019145747A (ja) * | 2018-02-23 | 2019-08-29 | Tdk株式会社 | 希土類磁石の製造方法 |
WO2019163766A1 (ja) * | 2018-02-23 | 2019-08-29 | Tdk株式会社 | 希土類磁石の製造方法 |
JP2020113578A (ja) * | 2019-01-08 | 2020-07-27 | 大同特殊鋼株式会社 | 成形型および磁石材料の成形方法 |
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EP2991086A4 (en) | 2016-03-23 |
US20160104571A1 (en) | 2016-04-14 |
EP2991086A1 (en) | 2016-03-02 |
JPWO2014174935A1 (ja) | 2017-02-23 |
CN105144322A (zh) | 2015-12-09 |
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