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JPS55141710A - Manufacture of permanent magnet - Google Patents

Manufacture of permanent magnet

Info

Publication number
JPS55141710A
JPS55141710A JP5015779A JP5015779A JPS55141710A JP S55141710 A JPS55141710 A JP S55141710A JP 5015779 A JP5015779 A JP 5015779A JP 5015779 A JP5015779 A JP 5015779A JP S55141710 A JPS55141710 A JP S55141710A
Authority
JP
Japan
Prior art keywords
magnetic
die
poles
magnetic fields
rare
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
JP5015779A
Other languages
Japanese (ja)
Inventor
Akio Kobayashi
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.)
Proterial Ltd
Original Assignee
Hitachi Metals Ltd
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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP5015779A priority Critical patent/JPS55141710A/en
Publication of JPS55141710A publication Critical patent/JPS55141710A/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)
  • Powder Metallurgy (AREA)

Abstract

PURPOSE:To make the magnetic-flux waveform of the external portion of magnetic fields to be a smooth sinusoidal wave and to make the total amount of the magnetic fuluxes large, by providing 4 magnetic poles which contact with a metal mold and forming fine powder comprising rare-earth elements and an alloy of Co, Fe, Cu and the like in the hyperbolic magnetic fields. CONSTITUTION:Magnetic poles 11 and 12 contacted with a nonmagnetic die holder 10, and alloy powder is filled in the cavity between a core pin 7 and a die. The powder body is compressed and formed by applying DC magnetic fields. The number of poles is 4, and the poles are arranged as shown in the Figure. A nonmagnetic material is used as a die-holder material. The magnetic fields are distributed in a shape of hyperbolic lines and acted on the die. As a result, the rare-earth magnet for coreless motors whose rotation is smooth and driving force is large and which have a civity in the direction of the diameter can be obtained.
JP5015779A 1979-04-23 1979-04-23 Manufacture of permanent magnet Pending JPS55141710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5015779A JPS55141710A (en) 1979-04-23 1979-04-23 Manufacture of permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5015779A JPS55141710A (en) 1979-04-23 1979-04-23 Manufacture of permanent magnet

Publications (1)

Publication Number Publication Date
JPS55141710A true JPS55141710A (en) 1980-11-05

Family

ID=12851347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5015779A Pending JPS55141710A (en) 1979-04-23 1979-04-23 Manufacture of permanent magnet

Country Status (1)

Country Link
JP (1) JPS55141710A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211502A (en) * 1983-05-18 1984-11-30 Tdk Corp Production of permanent magnet body having surface multipolar anisotropy
CN111516119A (en) * 2020-05-09 2020-08-11 湖北华磁电子科技有限公司 Soft magnetic ferrite unburned bricks grinding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211502A (en) * 1983-05-18 1984-11-30 Tdk Corp Production of permanent magnet body having surface multipolar anisotropy
CN111516119A (en) * 2020-05-09 2020-08-11 湖北华磁电子科技有限公司 Soft magnetic ferrite unburned bricks grinding device

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