JPS5630706A - Method and device for formation of eare earth cobalt magnet in magnetic field - Google Patents

Method and device for formation of eare earth cobalt magnet in magnetic field

Info

Publication number
JPS5630706A
JPS5630706A JP10663479A JP10663479A JPS5630706A JP S5630706 A JPS5630706 A JP S5630706A JP 10663479 A JP10663479 A JP 10663479A JP 10663479 A JP10663479 A JP 10663479A JP S5630706 A JPS5630706 A JP S5630706A
Authority
JP
Japan
Prior art keywords
magnetic field
magnet
powder
magnetized
earth cobalt
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.)
Pending
Application number
JP10663479A
Other languages
Japanese (ja)
Inventor
Tetsuo Hori
Junichi Shiraishi
Hiroshi Shimizu
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP10663479A priority Critical patent/JPS5630706A/en
Publication of JPS5630706A publication Critical patent/JPS5630706A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

PURPOSE:To manufacture easily the magnet having a special magnetization distribution like the radial distribution, etc., by a method wherein the material powder of the rare earth cobalt magnet is magnetized in an optional direction by the magnetizing field, and is formed applying an orientational magnetic field. CONSTITUTION:A nonmagnetic lower punch 4 is inserted into a mortar 1 consisted of a magnetic material having a saturated magnetic flux density, a center bar 6 made of a magnetic material is made to protrude and the material powder 9 of the rare earth cobalt magnet is put in a penetrating hole 2. A D.C. current or a pulse current is made to flow through a magnetizing field-applying coil 7 to apply a strong magnetizing field in the optional direction, and the powder 9 is magnetized previously. After the current flowing through the coil 7 is cut, currents are made to flow through orientational magnetic field-applying coils 8A, 8B respectively to apply a relatively weak orientational magnetic field in the radial direction. In this state, an upper punch 3 is made to come down to compress and to form the powder 9. After the ring-shape formed substance is sintered, it is magnetized in a desired direction to manufacture the special magnet having the radial distribution etc.
JP10663479A 1979-08-23 1979-08-23 Method and device for formation of eare earth cobalt magnet in magnetic field Pending JPS5630706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10663479A JPS5630706A (en) 1979-08-23 1979-08-23 Method and device for formation of eare earth cobalt magnet in magnetic field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10663479A JPS5630706A (en) 1979-08-23 1979-08-23 Method and device for formation of eare earth cobalt magnet in magnetic field

Publications (1)

Publication Number Publication Date
JPS5630706A true JPS5630706A (en) 1981-03-27

Family

ID=14438537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10663479A Pending JPS5630706A (en) 1979-08-23 1979-08-23 Method and device for formation of eare earth cobalt magnet in magnetic field

Country Status (1)

Country Link
JP (1) JPS5630706A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154118A (en) * 1984-12-27 1986-07-12 Tdk Corp Molding method in magnetic field of rare earth magnet and device thereof
JPH0256904A (en) * 1989-03-10 1990-02-26 Seiko Epson Corp Manufacture of resin-bound rare-earth magnet
JP2015070749A (en) * 2013-09-30 2015-04-13 Tdk株式会社 Bow-shaped magnet piece and motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019619A (en) * 1973-06-23 1975-03-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019619A (en) * 1973-06-23 1975-03-01

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154118A (en) * 1984-12-27 1986-07-12 Tdk Corp Molding method in magnetic field of rare earth magnet and device thereof
JPH0256904A (en) * 1989-03-10 1990-02-26 Seiko Epson Corp Manufacture of resin-bound rare-earth magnet
JP2015070749A (en) * 2013-09-30 2015-04-13 Tdk株式会社 Bow-shaped magnet piece and motor

Similar Documents

Publication Publication Date Title
JPS6427208A (en) Cylindrical permanent magnet, motor using same and manufacture thereof
ES8502738A1 (en) RE-TM-B alloys, method for their production and permanent magnets containing such alloys.
US3640657A (en) Apparatus for extruding cylindrical magnets
DE2538320A1 (en) PERMANENT MAGNETIC RUNNER FOR DYNAMOELECTRIC MACHINERY AND PROCESS FOR THEIR PRODUCTION
EP0325403A3 (en) Resin bonded magnets
JPS5630706A (en) Method and device for formation of eare earth cobalt magnet in magnetic field
JPS57170501A (en) Production of magneto roll
US4920326A (en) Method of magnetizing high energy rare earth alloy magnets
EP0924716A3 (en) Rare earth-based permanent magnet material and method for the preparation thereof
JPS6134249B2 (en)
JPS5674907A (en) Manufacturing process of permanent magnet magnetized in radial direction
GB1449687A (en) Method of magnetising a magnet body
GB1447264A (en) Polymer bonded magnets
JPH0626169B2 (en) Method and apparatus for forming rare earth magnet in magnetic field
JPS5759465A (en) Dc electric nachine
JPS57148567A (en) Cylindrical magnet and manufacture thereof
JPS55160404A (en) Manufacture of magnetically anisotropic permanent magnet and device thereof
JPH045246B2 (en)
JPS63213907A (en) Magnetization of permanent magnet
JPS5663171A (en) Solenoid valve
JPS5640207A (en) Magnetizing distribution control method for rare earth cobalt magnet
DE3620970A1 (en) Mask holding device
JPH06330103A (en) Die for compacting magnetic powder
JP2822169B2 (en) Ring magnet forming apparatus and method
Oliveira et al. Magnetic Properties of Alloys of Pr--Fe--B Produced by Rapid Cooling.(Retroactive Coverage)