FR2385196A1 - Procede de fabrication d'aimants incurves de faible epaisseur a partir de poudres d'alliages terre rare-cobalt - Google Patents

Procede de fabrication d'aimants incurves de faible epaisseur a partir de poudres d'alliages terre rare-cobalt

Info

Publication number
FR2385196A1
FR2385196A1 FR7808018A FR7808018A FR2385196A1 FR 2385196 A1 FR2385196 A1 FR 2385196A1 FR 7808018 A FR7808018 A FR 7808018A FR 7808018 A FR7808018 A FR 7808018A FR 2385196 A1 FR2385196 A1 FR 2385196A1
Authority
FR
France
Prior art keywords
blanks
mandrel
cobalt
rare
alloy powders
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.)
Withdrawn
Application number
FR7808018A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motors Liquidation Co
Original Assignee
General Motors Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Motors Corp filed Critical General Motors Corp
Publication of FR2385196A1 publication Critical patent/FR2385196A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • 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
    • H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 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
    • H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
    • 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
    • H01F41/14—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 applying magnetic films to substrates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/30—Reducing waste in manufacturing processes; Calculations of released waste quantities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
    • Y10T29/49076—From comminuted material

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Powder Metallurgy (AREA)

Abstract

Le procédé consiste à former des ébauches en poudre de terre rare - cobalt agglomérées à froid dans une presse entre une matrice et un mandrin, le mandrin portant les ébauches étant retiré de la matrice et placé dans un appareil d'aimantation pour aligner magnétiquement la poudre dans une direction radiale par rapport à la courbure des ébauches. Les ébauches sont ensuite placées sur un autre mandrin et dans une enveloppe d'acier 30 et l'ensemble est soumis à un compactage isostatique à chaud qui comprime les ébauches à une densité d'au moins 90 % de la densité théorique de la poudre et les lie métallurgiquement à l'enveloppe. Apres refroidissement, on retire le mandrin et on réaimante les aimants formés 42. L'invention est applicable à la fabrication de petits moteurs à courant continu à aimants permanents.
FR7808018A 1977-03-21 1978-03-20 Procede de fabrication d'aimants incurves de faible epaisseur a partir de poudres d'alliages terre rare-cobalt Withdrawn FR2385196A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/779,525 US4104787A (en) 1977-03-21 1977-03-21 Forming curved wafer thin magnets from rare earth-cobalt alloy powders

Publications (1)

Publication Number Publication Date
FR2385196A1 true FR2385196A1 (fr) 1978-10-20

Family

ID=25116724

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808018A Withdrawn FR2385196A1 (fr) 1977-03-21 1978-03-20 Procede de fabrication d'aimants incurves de faible epaisseur a partir de poudres d'alliages terre rare-cobalt

Country Status (4)

Country Link
US (3) US4104787A (fr)
CA (1) CA1085902A (fr)
DE (1) DE2810498A1 (fr)
FR (1) FR2385196A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526994A1 (fr) * 1982-05-11 1983-11-18 Draper Lab Charles S Procede et appareillage pour produire des aimants cobalt-terre rare en anneau a orientation radiale du champ magnetique et aimant permanent ainsi obtenu
FR2617345A1 (fr) * 1987-06-23 1988-12-30 Valeo Stator de machine tournante electrique a aimants permanents, et pole inducteur destine a ce stator
FR2768551A1 (fr) * 1997-09-12 1999-03-19 Rhodia Chimie Sa Aimant plat comportant une couche de revetement et son procede de preparation

Families Citing this family (49)

* Cited by examiner, † Cited by third party
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US4250423A (en) * 1978-08-25 1981-02-10 Sundstrand Corporation Generator with stator retention
US4325757A (en) * 1979-09-04 1982-04-20 General Motors Corporation Method of forming thin curved rare earth-transition metal magnets from lightly compacted powder preforms
US4296343A (en) * 1979-10-05 1981-10-20 Ambac Industries, Incorporated Electric motor housing, or the like, with integral pole and methods for making same
US4385944A (en) * 1980-05-29 1983-05-31 Allied Corporation Magnetic implements from glassy alloys
US4460839A (en) * 1980-06-09 1984-07-17 The Singer Company Magnetic laminae sections for single air gap motor
US4308479A (en) * 1980-08-28 1981-12-29 General Electric Company Magnet arrangement for axial flux focussing for two-pole permanent magnet A.C. machines
US4533407A (en) * 1981-03-30 1985-08-06 The Charles Stark Draper Laboratory, Inc. Radial orientation rare earth-cobalt magnet rings
US4628809A (en) * 1981-03-30 1986-12-16 The Charles Stark Draper Laboratory Radial orientation rare earth-cobalt magnet rings
DE3205158C1 (de) * 1982-02-13 1983-08-25 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Kapsel fuer das heissisostatische Pressen von hochbeanspruchten und kompliziert geformten Werkstuecken fuer Turbomaschinen
US4453097A (en) * 1982-09-01 1984-06-05 Powertron Division Of Contraves Goerz Corp. Permanent magnet DC motor with magnets recessed into motor frame
US4508988A (en) * 1982-12-21 1985-04-02 Kollmorgen Technologies Corporation Permanent magnet motor stator for d.c. motors
US4606883A (en) * 1983-10-21 1986-08-19 J. Wizemann Gmbh & Co. Method of manufacturing a metallic composite article
US4686397A (en) * 1985-04-11 1987-08-11 The United States Of America As Represented By The Secretary Of The Air Force Brush and commutator segment torquer motor
JPS62180005A (ja) * 1986-01-31 1987-08-07 Kobe Steel Ltd 複合中空部材の製造方法
US4713877A (en) * 1986-02-05 1987-12-22 Ford Motor Company Method of forming permanent magnets within a motor yoke
JPS62161569U (fr) * 1986-04-04 1987-10-14
JPS6328844A (ja) * 1986-07-23 1988-02-06 Toshiba Corp 永久磁石材料
GB8727851D0 (en) * 1987-11-27 1987-12-31 Ici Plc Process for production of bonded magnet
US4920009A (en) * 1988-08-05 1990-04-24 General Motors Corporation Method for producing laminated bodies comprising an RE-FE-B type magnetic layer and a metal backing layer
US5049053A (en) * 1988-08-18 1991-09-17 Hitachi Metals, Ltd. Metal mold for molding anisotropic permanent magnets
US4980593A (en) * 1989-03-02 1990-12-25 The Balbec Corporation Direct current dynamoelectric machines utilizing high-strength permanent magnets
US5032352A (en) * 1990-09-21 1991-07-16 Ceracon, Inc. Composite body formation of consolidated powder metal part
US5242508A (en) * 1990-10-09 1993-09-07 Iowa State University Research Foundation, Inc. Method of making permanent magnets
US5240513A (en) * 1990-10-09 1993-08-31 Iowa State University Research Foundation, Inc. Method of making bonded or sintered permanent magnets
IT1245838B (it) * 1990-11-15 1994-10-24 Getters Spa Motore elettrico senza spazzole e rotore relativo.
DE4228519B4 (de) * 1992-08-27 2006-04-27 Vacuumschmelze Gmbh Verfahren zur Herstellung von kunststoffgebundenen anisotropen Dauermagnetformteilen
DE4228520C2 (de) * 1992-08-27 2000-10-26 Vacuumschmelze Gmbh Verfahren zur Herstellung von dünnwandigen kunststoffgebundenen Dauermagnetformteilen, wie zum Beispiel Schalenmagneten
KR100348962B1 (ko) * 1997-01-20 2003-01-24 가부시키 가이샤 메이덴샤 희토류자석과금속재료의일체접합구조물및그의접합방법
US5893206A (en) * 1997-02-04 1999-04-13 Eastman Kodak Company Method for the formation and polarization of micromagnets
AU735668B2 (en) 1997-03-24 2001-07-12 Materials Innovation Inc. Method for making parts from particulate ferrous material
US6624539B1 (en) * 1997-05-13 2003-09-23 Edge Technologies, Inc. High power ultrasonic transducers
DE19845370A1 (de) * 1998-10-02 2000-04-06 Bosch Gmbh Robert Dauermagneterregter Kleinmotor
EP1237261B1 (fr) * 2001-02-27 2004-04-14 Grundfos A/S Procédé pour la production d'un rotor encapsulé d'un moteur à aimant permanent
WO2002089294A1 (fr) * 2001-04-25 2002-11-07 Toshiba Tec Kabushiki Kaisha Moteur electrique c.c.
US20030214194A1 (en) * 2002-05-20 2003-11-20 General Electric Company Rotor assembly and method of making
US20040169434A1 (en) * 2003-01-02 2004-09-02 Washington Richard G. Slip ring apparatus
US7071591B2 (en) * 2003-01-02 2006-07-04 Covi Technologies Electromagnetic circuit and servo mechanism for articulated cameras
US20050001499A1 (en) * 2003-07-01 2005-01-06 Litton Systems, Inc. Permanent magnet rotor for brushless D.C. motor
US7034427B2 (en) * 2003-08-18 2006-04-25 Light Engineering, Inc. Selective alignment of stators in axial airgap electric devices comprising low-loss materials
US20070024147A1 (en) * 2003-08-18 2007-02-01 Hirzel Andrew D Selective alignment of stators in axial airgap electric devices comprising low-loss materials
DE102006061957A1 (de) * 2006-12-29 2008-07-03 Robert Bosch Gmbh Scheibenwischvorrichtung
CN101689424B (zh) * 2007-06-28 2014-07-09 日立金属株式会社 R-tm-b系径向各向异性环状磁铁、该磁铁的制造方法、及用于制造该磁铁的模具、以及无刷电动机用转子
US9099905B2 (en) 2012-10-15 2015-08-04 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9246364B2 (en) 2012-10-15 2016-01-26 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
US9831727B2 (en) 2012-10-15 2017-11-28 Regal Beloit America, Inc. Permanent magnet rotor and methods thereof
US9362792B2 (en) 2012-10-15 2016-06-07 Regal Beloit America, Inc. Radially embedded permanent magnet rotor having magnet retention features and methods thereof
US9882440B2 (en) 2012-10-15 2018-01-30 Regal Beloit America, Inc. Radially embedded permanent magnet rotor and methods thereof
CN106270519A (zh) * 2015-06-12 2017-01-04 中国科学院物理研究所 一种永磁材料的制备方法
FR3045924B1 (fr) * 2015-12-17 2021-05-07 Commissariat Energie Atomique Noyau d'inductance a pertes magnetiques reduites

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US3977918A (en) * 1975-04-07 1976-08-31 Raytheon Company Method of making magnets
US3992202A (en) * 1974-10-11 1976-11-16 Crucible Inc. Method for producing aperture-containing powder-metallurgy article

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JPS5022209A (fr) * 1973-07-04 1975-03-10
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US4091300A (en) * 1975-08-30 1978-05-23 Lucas Industries Limited Permanent magnet electrical machines
US4076561A (en) * 1976-10-15 1978-02-28 General Motors Corporation Method of making a laminated rare earth metal-cobalt permanent magnet body

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US3977918A (en) * 1975-04-07 1976-08-31 Raytheon Company Method of making magnets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526994A1 (fr) * 1982-05-11 1983-11-18 Draper Lab Charles S Procede et appareillage pour produire des aimants cobalt-terre rare en anneau a orientation radiale du champ magnetique et aimant permanent ainsi obtenu
FR2617345A1 (fr) * 1987-06-23 1988-12-30 Valeo Stator de machine tournante electrique a aimants permanents, et pole inducteur destine a ce stator
FR2768551A1 (fr) * 1997-09-12 1999-03-19 Rhodia Chimie Sa Aimant plat comportant une couche de revetement et son procede de preparation

Also Published As

Publication number Publication date
CA1085902A (fr) 1980-09-16
US4151435A (en) 1979-04-24
US4104787A (en) 1978-08-08
DE2810498A1 (de) 1978-09-28
US4123297A (en) 1978-10-31

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