JPS5550609A - Demagnetizer - Google Patents
DemagnetizerInfo
- Publication number
- JPS5550609A JPS5550609A JP12354878A JP12354878A JPS5550609A JP S5550609 A JPS5550609 A JP S5550609A JP 12354878 A JP12354878 A JP 12354878A JP 12354878 A JP12354878 A JP 12354878A JP S5550609 A JPS5550609 A JP S5550609A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- remained
- coil
- passes
- magnetic
- 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.)
- Granted
Links
Abstract
PURPOSE:To effectively demagnetize the residual magnetism in a steel material by passing the steel material being magnetically saturated by direct currents at eddy- current flaw detecting procedure and the like through the three-staged coils which generate DC, AC, and DC or AC magnetic fields respectively at a low electric power level. CONSTITUTION:A steel material 3 is magnetically saturated by direct currents in eddy-current defect-detecting or magnetic defect-detecting operations, and the magnetic flux 1 is remained in the inside of the steel material 3. When the steel material 3 passes through a coil A, the magnetic flux 1 is demagnetized to the extent it is not inverted by the de-variable magnetic field of the coil. When the steel material 3 passes through the ac magnetic field of a coil B, the still-remained remanence is stably reduced to the vicinity of zero. Then, when the steel material 3 passes through a coil C, the magnetism remained in the steel material 3 caused by geomagnetism or external magnetism is completely dissapeared by the dc or ac magnetic field. In this constitution the remanence remained in the steel material 3 after the defect detection is effectively demagnetized at a low electric power level.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12354878A JPS5550609A (en) | 1978-10-09 | 1978-10-09 | Demagnetizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12354878A JPS5550609A (en) | 1978-10-09 | 1978-10-09 | Demagnetizer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5550609A true JPS5550609A (en) | 1980-04-12 |
JPS6336123B2 JPS6336123B2 (en) | 1988-07-19 |
Family
ID=14863318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12354878A Granted JPS5550609A (en) | 1978-10-09 | 1978-10-09 | Demagnetizer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5550609A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3500011A1 (en) * | 1985-01-02 | 1985-06-13 | Axel R. Dr.-Ing. 5900 Siegen Hidde | Method and arrangement for the regulated demagnetisation of rod-shaped, ferromagnetic and heat-treated semi-finished goods or finished goods in a continuous production process |
US4956728A (en) * | 1984-07-16 | 1990-09-11 | Fuji Photo Film Co., Ltd. | Method of and device for demagnetizing magnetic recording medium |
-
1978
- 1978-10-09 JP JP12354878A patent/JPS5550609A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4956728A (en) * | 1984-07-16 | 1990-09-11 | Fuji Photo Film Co., Ltd. | Method of and device for demagnetizing magnetic recording medium |
US5053893A (en) * | 1984-07-16 | 1991-10-01 | Fuji Photo Film Co., Ltd. | Method of and device for demagnetizing magnetic recording medium |
DE3500011A1 (en) * | 1985-01-02 | 1985-06-13 | Axel R. Dr.-Ing. 5900 Siegen Hidde | Method and arrangement for the regulated demagnetisation of rod-shaped, ferromagnetic and heat-treated semi-finished goods or finished goods in a continuous production process |
DE3500011C2 (en) * | 1985-01-02 | 1986-04-17 | Axel R. Dr.-Ing. 5900 Siegen Hidde | Process for the controlled demagnetization of rod-shaped, ferromagnetic and tempered semi-finished or finished products in the ongoing production process |
Also Published As
Publication number | Publication date |
---|---|
JPS6336123B2 (en) | 1988-07-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56148052A (en) | Electromagnetic flaw detector for continuous magnetic material | |
US3560846A (en) | Magnetic proximity detector | |
GB936033A (en) | Method of, and means for detecting defects in elongated metallic objects | |
JPS5550609A (en) | Demagnetizer | |
JPS5730971A (en) | Metal detector | |
JPS56158967A (en) | Magnetism detector | |
JPS54128719A (en) | Vertical magnetization recorder | |
JPS5585249A (en) | Vortex flow detector | |
GB1424986A (en) | Electromagnetic device | |
JPS57161631A (en) | Detecting device for surface stress | |
SU151853A1 (en) | Magnetizing device for magnetic flaw detector | |
JPS57187651A (en) | Flaw detection of cast iron tube | |
JPS54104888A (en) | Magnetic flaw detector of steel rope | |
SU624181A1 (en) | Method of measuring resiual magnetic flux in electromagnet core | |
JPS55114947A (en) | Magnetic flaw detector of rope | |
SU459257A1 (en) | Demagnetizer | |
JPS56132558A (en) | Electromagnetic ultrasonic wave probe | |
JPS5764188A (en) | Ferrite detector | |
SU151091A1 (en) | Method for detecting defects in articles made of ferromagnetic materials | |
JPS567054A (en) | Magnetic flaw detector for rope | |
JPS55129747A (en) | Damage detection and measuring method for terminal part of steel wire | |
SU707882A1 (en) | Load-lifting device | |
SU7570A1 (en) | Permanent magnetization device | |
SU67549A1 (en) | Device for measuring magnetic and electrical quantities | |
SU957091A1 (en) | Magnetizing device |