Manufacturing method of radial orientation permanent magnetic ferrite magnetic rotor

Abstract

The invention discloses a manufacturing method of a radial orientation permanent magnetic ferrite magnetic rotor. The manufacturing method comprises the following steps: 1, weighing raw materials; 2,mixing the raw materials; 3, refining and blending; 4, crushing, and carrying out ball milling; 5, forming and sintering; and 6, assembling a rotor, wherein in the step 1, the selected raw materials comprise, by weight, 80-88% of Fe2O3, 6-12% of SrCO3, 2-4% of CaCO3, 0.3-1.0% of Si02, 3-6% of a modifier, 0.3-0.5% of a plasticizer and 0.1-0.6% of an additive. According to the manufacturing method,a proper amount of SiO2 is added into production raw materials of the permanent magnetic ferrite so as to improve the magnetism of the permanent magnetic ferrite, and SiO2 plays a role in refining grains, so that the problem of magnetism weakening is well solved; and the manufacturing process of the rotor is standardized, the raw materials are fully crushed, the granularity and mixing uniformity of the raw materials are guaranteed, later forming is tighter, sufficient sintering treatment is matched, and the bearing strength and wear resistance of the rotor magnetic shoe are guaranteed.

Description

technical field [0001] The invention relates to the field of magnet rotors, in particular to a method for manufacturing a radially oriented permanent magnet ferrite rotor. Background technique [0002] With the development of permanent magnet motor manufacturing technology and its control technology, permanent magnet motors, especially high-power permanent magnet motors, have gradually replaced asynchronous motors and are widely used in various industrial fields; The rationality of the design and the simplicity of the process have an important impact on the manufacture and stable operation of the motor; the radially oriented permanent magnets on the existing market are widely used on the rotor; [0003] Radial oriented permanent magnets are a category of permanent magnets. Radial oriented permanent magnets entered the market about 20 years later than ordinary axial permanent magnets; with the development of home appliance industry and information industry, permanent magnet s...

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Problems solved by technology

[0004] The magnetic properties of the existing permanent magnet ferrite are insufficient, and the problem of magnetic degradation of the rotor will occur during long-term use. The defects of the traditional rotor manufacturing method cannot realize the one-time forming of the rotor magnetic tile, and the rotor magnetic tile does not have a good bearing capacity. Compressive strength and wear resistance, so it is meaningful to design a manufacturing method for radially oriented permanent ferrite magnetic rotors

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