Magnetism keeping and guiding assembly method of aluminum-nickel-cobalt magnetic steel integral torque motor

Abstract

The invention relates to a magnetism keeping and guiding assembly method of an aluminum-nickel-cobalt magnetic steel integral torque motor. The method comprises the following steps: 1, extracting a motor stator from a magnetizing head assembly and pulling the motor stator into a magnetism-keeping bushing by adopting a stator operating rod, wherein in the process, the stator magnetic steel of the motor and the magnetizing iron core or the magnetism-keeping bushing or the two form a closed magnetic circuit. 2, pushing the motor stator arranged in the magnetism-keeping bushing into a magnetism-keeping base through the positioning operation rod, wherein in the process, a closed magnetic circuit is formed by the stator magnetic steel and the magnetism-keeping base or the magnetism-keeping bushing or the two; and 3, after the magnetic-keeping bushing and the positioning operation rod are dismounted, making the motor rotor coaxially pressed and fixed between a chassis base and the magnetic-keeping base by utilizing the chassis base, and making the motor stator in the magnetism-keeping base pressed into the motor rotor by utilizing a stator pressing-in piece, wherein in the process, the stator magnetic steel and the magnetism-keeping base, or a magnetic conductive cover, or the rotor iron core or two or three of the magnetism-keeping base, the magnetic conductive cover and the rotor iron core form a closed magnetic circuit. According to the invention, magnetism keeping in the whole assembling process of the aluminum-nickel-cobalt magnetic steel is realized.

Description

technical field [0001] The invention belongs to the technical field of precision assembly of special motors, and relates to the assembly technology of a torque motor using AlNiCo magnets, in particular to a magnetization-preserving and guiding assembly method for a nickel-cobalt magnet steel integral torque motor. Background technique [0002] NdFeB rare earth magnets have high coercive force, high remanence, and high energy product. They are the most widely used permanent magnet materials today, but they have obvious thermal expansion coefficient anisotropy, Defects such as high temperature coefficient and low Curie temperature. Alnico magnets have low coercive force, high remanence, and low energy product, but they have the advantages of isotropic linear expansion coefficient, low temperature coefficient of remanence, and high Curie temperature. Therefore, before the advent of NdFeB magnets, AlNiCo magnets were widely used in permanent magnet motors, and they are still wi...

AI Technical Summary

Problems solved by technology

However, in order to improve the performance of the output torque, the self-contained torque motor is generally designed as a structure with an iron core on the rotor. The rotor iron core is an indispensable part of the magnetic circuit. Therefore, the above design methods and technical measures are not suitable for the whole motor. Magnetic preservation in the whole process of assembly of AlNiCo magnets for mounted torque motors

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