Workpiece demagnetizing method and workpiece demagnetizing device

A degaussing method and a technology of a degaussing device, which are applied in the field of degaussing, can solve problems such as unsatisfactory degaussing effect and failure to be used in real applications, and achieve the effects of good degaussing effect, compact structure, and reduced device volume
CN101593604AInactive Publication Date: 2009-12-02HUAIYIN INSTITUTE OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAIYIN INSTITUTE OF TECHNOLOGY
Publication Date
2009-12-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a workpiece demagnetizing method and a workpiece demagnetizing device. The method selects a square wave signal with unchanged frequency and amplitude; an amplifying circuit and a push-pull circuit are connected into a drive circuit; and the drive circuit is connected with a coil. Corresponding to the method, the demagnetizing device mainly comprises a power supply, a signal generator, a driver and a coil. An unfading alternating magnetic field generated by the method and the device can not only demagnetize a static workpiece but also can carry out continuous demagnetization on a dynamic workpiece and have wide application range; a ferrite is adopted as a magnetic core; demagnetizing current with high frequency and unchanged amplitude is conducted to the coil; the alternating magnetic field generated by the coil can disturb the residual magnetic domain of the workpiece; the demagnetizing effect is good; and the method is simple and feasible and the device has a compact structure so as to solve the difficult problem of demagnetization in the field and have practical value.
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Description

technical field

[0001] The invention relates to degaussing technology, in particular to a degaussing method and a degaussing device for workpieces. Background technique

[0002] In industrial production, due to the process conditions, there is often residual magnetism on the workpiece. When the residual magnetism exceeds a certain value, it will cause misjudgment during workpiece flaw detection, so the workpiece must be demagnetized; however, sometimes Due to the needs of workpiece flaw detection, it is necessary to smear magnetic powder on the surface of the workpiece for comparison test to assist in the judgment of flaw detection, but eventually the residual magnetism on the workpiece must be eliminated. At this stage, foreign degaussing methods for workpieces mainly use alternating power supply and supply power frequency current of appropriate strength to the coil, so that the alternating magnetic field generated by the coil acts on the residual magnetic area of ​​the wor...

Claims

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