JPS56124212A - Demagnetizing device - Google Patents

Demagnetizing device

Info

Publication number
JPS56124212A
JPS56124212A JP2669580A JP2669580A JPS56124212A JP S56124212 A JPS56124212 A JP S56124212A JP 2669580 A JP2669580 A JP 2669580A JP 2669580 A JP2669580 A JP 2669580A JP S56124212 A JPS56124212 A JP S56124212A
Authority
JP
Japan
Prior art keywords
demagnetizing
steel
demagnetization
cut
magnetizing
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
JP2669580A
Other languages
Japanese (ja)
Inventor
Susumu Ito
Kiyoshi Katsuta
Tadashi Kanetani
Katsutoshi Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Ltd filed Critical Hitachi Ltd
Priority to JP2669580A priority Critical patent/JPS56124212A/en
Publication of JPS56124212A publication Critical patent/JPS56124212A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)

Abstract

PURPOSE:To demagnetize the residual magnetism of a special steel by a method wherein the magnetic flux acting on a material to be demagnetized is so controlled as to vary as positive negative demagnetization negative. CONSTITUTION:U character type magnets consisting yokes 5, magnetic poles 6, 7 and exciting coils 8 are equipped on a frame 10 extending nearly over the whole length of the steel material 1 interposing a nonmagnetic material 9 between them to form the demagnetizing device. When the steel material 1 is an ordinary steel, the demagnetization can be performed simply by making one cycle of the demagnetizing current -i to flow against the magnetizing current +i. When the steel material 1 is the special steel, the demagnetization can be performed comparatively effectively by making one cycle of the demagnetizing current -i' to flow against the magnetizing current +i. Moreover when the special steel is Chrome-molybdenum steel, etc., two cycle demagnetization reversing the polarity proves effective. Namely it forms the demagnetizing pattern of magnetizing +i cut demagnetizing -i' cut reverse directional magnetizing -i cut reverse directional demagnetizing +i' cut. Accordingly even in the special steel, the residual magnetism can be demagnetized.
JP2669580A 1980-03-05 1980-03-05 Demagnetizing device Pending JPS56124212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2669580A JPS56124212A (en) 1980-03-05 1980-03-05 Demagnetizing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2669580A JPS56124212A (en) 1980-03-05 1980-03-05 Demagnetizing device

Publications (1)

Publication Number Publication Date
JPS56124212A true JPS56124212A (en) 1981-09-29

Family

ID=12200518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2669580A Pending JPS56124212A (en) 1980-03-05 1980-03-05 Demagnetizing device

Country Status (1)

Country Link
JP (1) JPS56124212A (en)

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