JP6079643B2 - 焼結磁石の製造方法および製造装置 - Google Patents
焼結磁石の製造方法および製造装置 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 32
- 238000012937 correction Methods 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 38
- 238000005245 sintering Methods 0.000 claims description 20
- 238000000465 moulding Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000003860 storage Methods 0.000 description 30
- 238000001816 cooling Methods 0.000 description 20
- 238000012360 testing method Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 12
- 229910052692 Dysprosium Inorganic materials 0.000 description 9
- 238000003754 machining Methods 0.000 description 9
- 229910052771 Terbium Inorganic materials 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 8
- 230000032683 aging Effects 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 229910052777 Praseodymium Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005324 grain boundary diffusion Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 pulverization method Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- 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
- B22F3/003—Apparatus, e.g. furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/35—Iron
- B22F2301/355—Rare Earth - Fe intermetallic alloys
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
Description
図1は本発明の第1実施形態に係る焼結磁石の製造方法を示すフローチャートである。本実施形態においてR−Fe−B系の焼結磁石は、原料となる合金の作製(ステップS1)、粗粉砕(ステップS2)、微粉砕(ステップS3)、磁場中成形(ステップS4)、焼結(ステップS5)、寸法矯正(ステップS6)、時効熱処理(ステップS7)、表面処理(ステップS8)、検査(ステップS9)、及び着磁(ステップS10)の工程を経ることによって製造される。
図7は第2実施形態に係る寸法矯正装置を示す側面図、図8は同寸法矯正装置中の格納容器の内部を示す平面図、図9はワークである焼結磁石を金型上に載置する位置決め固定治具について示す平面図、図10は焼結磁石を下金型に位置決めする様子の説明に供する説明図である。なお、符号は第1実施形態と共通する構成は同一符号とし、第2実施形態に係る寸法矯正装置は、基本的に第1実施形態と同様であるため説明を省略する。
次に本実施形態に係る焼結磁石の製造方法において。寸法矯正工程時に行うプレス加工の成形温度に関する実験を行ったので説明する。
次に上記焼結磁石の製造方法によって製造した焼結磁石の寸法精度に関して、焼結磁石の反り量を確認したので説明する。
12 下ダイ、
13 上金型(第1の型)、
14 下金型(第2の型)、
15 外周金型、
16 固定治具、
17 クランクピン、
100 ダイセット、
20 格納容器、
200 プレス装置本体、
201 上スライド、
202 ボルスタ、
203 ノックアウトバー、
204 油圧シリンダ、
21 加熱装置(加熱部)、
22 グローブ、
23 配管ダクト
24 冷却プレート、
25 冷却パイプ、
26 ロータリーテーブル、
26A〜26G 位置決め固定治具、
27 冷却ノズル、
28 押さえピン、
29 駆動シリンダ、
40 調節機構、
41 ガイドロッド、
42 ガイドシリンダ、
W ワーク。
Claims (6)
- R−Fe−B(RはNdを主成分とする希土類元素)を構成する磁石粉末をプレス成形することによって前記磁石粉末が圧縮して形成された圧粉体を成形し、
所定の焼結温度に前記圧粉体を加熱して焼結させることによって焼結磁石を成形し、
前記焼結温度を超えない温度に前記焼結磁石を加熱するとともに前記焼結磁石にプレス成形を行う上型、下型及び前記上型と前記下型とが加圧する加圧方向と交差する方向に焼結磁石を加圧する外周型により加圧成形することによって前記焼結磁石の寸法を矯正し、
前記焼結磁石の寸法矯正の後に、前記焼結磁石は前記上型および前記下型によって挟み込まれながら前記外周型から抜き出される、焼結磁石の製造方法。 - 前記焼結磁石の寸法を矯正する際には、前記焼結磁石の温度を620℃以上に加熱することを特徴とする請求項1に記載の焼結磁石の製造方法。
- 前記焼結磁石の寸法を矯正する際には、前記焼結磁石の温度を800℃以下に加熱することを特徴とする請求項1または2に記載の焼結磁石の製造方法。
- 前記焼結磁石の寸法を矯正する際には、前記焼結磁石を配置した空間を大気よりも低酸素雰囲気とすることによって行なわれる請求項1〜3のいずれか1項に記載の焼結磁石の製造方法。
- 前記焼結磁石の寸法を矯正する際には、前記焼結磁石が塑性変形する降伏応力以上の圧力において加圧成形が行われることを特徴とする請求項1〜4のいずれか1項に記載の焼結磁石の製造方法。
- R−FeーB系焼結磁石(RはNdを主成分とする希土類元素)を構成する磁石粉末をプレス成形することによって前記磁石粉末が圧縮して形成された圧粉体を所定の焼結温度に加熱することで形成された焼結磁石の寸法を矯正する寸法矯正部を備えた焼結磁石の製造装置であって、
前記寸法矯正部は、相対的に接近離間して前記焼結磁石にプレス成形を行う上型及び下型と、前記上型と前記下型とが加圧する加圧方向と交差する方向に前記焼結磁石を加圧する外周型と、前記焼結磁石を加熱する加熱部と、を有し、
前記加熱部によって前記焼結磁石を前記焼結温度を超えない温度に加熱するとともに前記上型、前記下型及び前記外周型によって前記焼結磁石を加圧成形することによって前記焼結磁石の寸法矯正を行い、
前記上型および前記下型によって前記焼結磁石を挟み込みながら前記焼結磁石を前記外周型から抜き出すことを特徴とする焼結磁石の製造装置。
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JP2012022471 | 2012-02-03 | ||
JP2012022471 | 2012-02-03 | ||
PCT/JP2013/052235 WO2013115325A1 (ja) | 2012-02-03 | 2013-01-31 | 焼結磁石の製造方法および製造装置 |
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JP6136146B2 (ja) * | 2012-08-31 | 2017-05-31 | 大同特殊鋼株式会社 | NdFeB系板状磁石の湾曲矯正方法、及びNdFeB系板状磁石の製造方法 |
CN109676129A (zh) * | 2018-12-17 | 2019-04-26 | 浙江东阳东磁稀土有限公司 | 一种高材料利用率的钕铁硼磁体制备方法 |
CN112509798B (zh) * | 2020-10-27 | 2022-05-06 | 宁波瑞途智能科技有限公司 | 一种钕铁硼磁铁成型压机 |
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JPS58164704A (ja) * | 1982-03-23 | 1983-09-29 | Sumitomo Metal Ind Ltd | 焼結品の製造法 |
JPS6159811A (ja) * | 1984-08-31 | 1986-03-27 | Fujitsu Ltd | 焼結希土類磁石を製造する方法 |
JPS61136656A (ja) * | 1984-12-07 | 1986-06-24 | Sumitomo Special Metals Co Ltd | 高性能焼結永久磁石材料の製造方法 |
JPS61140108A (ja) * | 1984-12-12 | 1986-06-27 | Namiki Precision Jewel Co Ltd | 永久磁石の製造方法 |
JPH0617535B2 (ja) * | 1985-08-01 | 1994-03-09 | 住友特殊金属株式会社 | 永久磁石材料の製造方法 |
JPS62262405A (ja) * | 1986-05-09 | 1987-11-14 | Hitachi Metals Ltd | 永久磁石合金の加工方法 |
JPH01270210A (ja) * | 1988-04-21 | 1989-10-27 | Hitachi Metals Ltd | アーク状永久磁石及びその製造方法 |
JP2791616B2 (ja) * | 1991-12-28 | 1998-08-27 | 山陽特殊製鋼株式会社 | リング状磁石材料の製造方法 |
JP2874432B2 (ja) * | 1992-03-13 | 1999-03-24 | トヨタ自動車株式会社 | 金属粉末焼結体のサイジング方法 |
JPH0885805A (ja) * | 1993-10-12 | 1996-04-02 | Hitachi Metal Ee F T:Kk | 焼結部品の製造方法 |
JP3491864B2 (ja) * | 1996-06-11 | 2004-01-26 | Tdk株式会社 | 金属素形体のサイジング方法 |
JP2004292840A (ja) * | 2003-03-25 | 2004-10-21 | Sumitomo Denko Shoketsu Gokin Kk | 焼結部品のサイジング方法及びサイジング用金型 |
JP2005079401A (ja) * | 2003-09-01 | 2005-03-24 | Ms Consulting:Kk | 磁気異方性焼結フェライト磁石の製造方法 |
JP2005310975A (ja) * | 2004-04-20 | 2005-11-04 | Toyota Motor Corp | 焼結ネオジム磁石および製造方法、回転電機 |
JP2008192696A (ja) * | 2007-02-01 | 2008-08-21 | Tdk Corp | 積層型電子部品の製造方法 |
JP2013098485A (ja) * | 2011-11-04 | 2013-05-20 | Toyota Motor Corp | 希土類磁石の製造装置と製造方法 |
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