Space rotary alternating magnetic field demagnetizing pole set

Abstract

Disclosed demagnezing pole subassembly of spatial rotating alternating magnetic field includes one or two groups, and one demagnezing pole group includes multiple demagnezing poles. Being connected to AC power source in certain phase, pole winding is installed onto magnetic iron core constitutes a magnetic pole. Demagnezing poles are distributed in array, and each demagnezing pole is connected to AC power source in different phases. There are certain spatial distances between magnetic poles in demagnezing device so as to form spatial rotating alternating magnetic field. Thus, there are demagnetizing fields in space in any direction so that direction of residual magnetism in work piece does not need to be determined in advance. The invention raises demagnezing efficiency, applicable to fields such as milling process, detection of defects, precision work, instrument and meters.

Description

Technical field [0001] The invention relates to fields with specific requirements for residual magnetism in grinding, flaw detection, precision machining, instrumentation, etc., and mainly relates to a space rotating alternating magnetic field demagnetization pole group. Background technique [0002] The demagnetization process is to disturb the magnetization to cause the direction consistency of the magnetic domains, and restore the magnetic neutral state of the disordered direction before the magnetic domains are not magnetized. There are two current demagnetization methods, one is heat treatment demagnetization method, and the other is diamagnetic field demagnetization method. The heat treatment demagnetization method is to heat the demagnetized workpiece above the Curie temperature point, so that the magnetism becomes paramagnetic and loses its magnetism. The anti-magnetic field demagnetization method has two necessary conditions, that is, the direction of the demagneti...

AI Technical Summary

Problems solved by technology

Because the magnetization of the workpiece and the direction of the residual magnetism in the processing process are affected by many factors, such as the shape of the workpiece, the magnetization method, the diffraction and decomposition of the residual magnetism and other factors, the direction of the residual magnetism may be diversified, which greatly increases the difficulty of determining the magnetization direction of the workpiece.

However, the currently used demagnetizers form an alternating magnetic field in a single direction, so demagnetization in a single direction cannot solve the diversification of the residual magnetism direction of the workpiece.

Therefore, it is impossible to demagnetize the workpiece with multiple magnetization, and the demagnetization effect is poor

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