Manufacturing method of small-size sintered NdFeB multi-pole magnetic ring

A technology of multi-pole magnetic ring and manufacturing method, which is applied in the direction of inductance/transformer/magnet manufacturing, magnetic materials, magnetic objects, etc., can solve the problems of inconvenient manufacturing, poor magnetic performance, low pressing pass rate and efficiency, and achieve pressing qualified The effects of increased efficiency, uniform magnetic ring density, improved pressing efficiency and pressing qualified rate
CN112164575AActive Publication Date: 2021-01-01SINOSTEEL ANHUI TIANYUAN TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SINOSTEEL ANHUI TIANYUAN TECH
Publication Date
2021-01-01

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Abstract

The invention discloses a manufacturing method of a small-size sintered NdFeB multi-pole magnetic ring, and belongs to the technical field of permanent magnet material preparation. According to the method, a pneumatic pressing device is adopted for pressing and forming sintered neodymium-iron-boron powder, then a pressed blank is taken out and subjected to isostatic pressing treatment, high-temperature sintering, tempering treatment and trepanning and grinding treatment, and the sintered NdFeB multi-pole magnetic ring is obtained. The pneumatic pressing device comprises an orientation mechanism and a pressing die, the orientation mechanism is composed of an even number of sintered NdFeB magnetic shoes which are evenly distributed in the circumferential direction at intervals, a die installation cavity is formed among the sintered NdFeB magnetic shoes in a surrounding mode, and the pressing die is correspondingly installed in the die installation cavity. By the adoption of the technicalscheme, the small-size sintered NdFeB multi-pole magnetic ring can be effectively manufactured, the manufacturing process is convenient, the equipment investment cost is low, the manufactured multi-pole magnetic ring is good in magnetic performance, and meanwhile the pressing percent of pass and the overall efficiency of the multi-pole magnetic ring are improved.
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Description

technical field

[0001] The invention belongs to the technical field of permanent magnet material preparation, and more specifically, designs a method for manufacturing a small-sized sintered NdFeB multi-pole magnetic ring. Background technique

[0002] Sintered NdFeB multi-pole magnetic ring is a new product developed in recent years. It is a new direction for the development of sintered NdFeB permanent magnet materials. It is mainly used in high-performance permanent magnet motors and sensors. It has high precision, stable operation and Low noise and other advantages, it is the first choice for high-speed, high-precision control motors, and is widely used in high-speed drive motors, servo motors and other industrial equipment automation, digital, intelligent equipment and other fields.

[0003] Sintered NdFeB multi-pole magnetic ring has the following advantages compared with the traditional magnetic ring spliced ​​by multi-tile-shaped magnetic blocks: its overall magnetic ...

Claims

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