Method and device for measuring magnetic declination of tile-shaped magnet element

Abstract

The invention discloses a method and device for measuring the magnetic declination of a tile-shaped magnet element. Firstly, the deflection height, relative to the datum line, of a datum component is detected under the action of a magnetic field, the deflection height, relative to the datum line, of the datum component serves as the detection datum, and then when a product to be detected is detected in the magnetic filed, the deflection height, relative to the datum line, of the product to be detected and the deflection height, relative to the datum line, of the datum component are compared to obtain whether the magnetic declination of the product to be detected is qualified. The method and device have the advantages that operation is simple, cost is low, the tile-shaped magnet element (after orientation forming) without magnetizing is detected, full detection of the magnetic declination of the tile-shaped magnet element can be achieved, and the percent of pass of the magnetic declination of the tile-shaped magnet elements of the whole batch is guaranteed.

Description

technical field [0001] The invention relates to a method and equipment for measuring magnetic declination, in particular to a method and equipment for measuring magnetic declination of a tile-shaped magnet element. Background technique [0002] In recent years, the world's economies have suffered continuous financial crises and long-term economic downturns. The requirements for reducing labor costs have become more sensitive, and the demand for production automation has become more urgent. As the main components of automatic production, new motors of various types and sizes have also significantly improved their quality and demand. The tile-shaped magnetic component is an important component for developing a motor, and its performance directly affects the quality of the motor, so the tile-shaped magnetic component is required to have better performance. Magnetic declination, as a performance parameter of a tile-shaped magnetic element, refers to an angle between the actual ...

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Problems solved by technology

However, the above-mentioned method has the following defects: 1. The equipment is complicated and the cost is high; 2. The tile-shaped magnetic element must have magnetism when measuring the magnetic declination, that is, the tile-shaped magnetic element needs to be magnetized after pressing and oriented. For the test of magnetic declination, when it is necessary to provide non-magnetic tile-shaped magnetic components, it is necessary to demagnetize the tile-shaped magnetic components after the magnetic declination test is completed, but it is made of strong magnetic materials such as sintered NdFeB. It is difficult to demagnetize the tile-shaped magnetic components after magnetization, and it is difficult to re-magnetize after demagnetization, so the above method can only be used for random inspection, and cannot guarantee the magnetic declination of the whole batch of tile-shaped magnetic components is qualified. Rate

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