Process for preparing hot deformed neodymium-iron-boron magnetic ring

CN120600505BActive Publication Date: 2026-06-16CHENGDU GALAXY MAGNETAB
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU GALAXY MAGNETAB
Filing Date
2025-06-12
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In the existing hot-deformed NdFeB magnetic ring manufacturing process, the insufficient ductility of the lubricant leads to low material utilization and poor performance of the magnetic ring cup. In particular, the lubricant is prone to cracking and falling off under high temperature and high pressure, which affects the surface quality and dimensional accuracy of the magnet.

Method used

Before the heat deformation treatment, a heat deformation auxiliary shim is placed between the magnetic ring blank and the core. The auxiliary shim deforms synchronously with the magnetic ring blank and serves as a carrier for the lubricant, ensuring that the lubricant is evenly distributed during the heat deformation process, avoiding cracking and falling off, and filling the cup mouth area to ensure consistent performance.

Benefits of technology

It significantly improves the surface quality of the inner wall of the magnetic ring, reduces wear during subsequent processing, increases the utilization rate of the magnetic ring blank, simplifies processing steps, reduces production costs, and is suitable for large-scale production.

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Abstract

The application relates to a preparation process of a hot-deformed neodymium-iron-boron magnetic ring and relates to the technical field of hot-deformed magnets. The preparation process adds a hot-deformed auxiliary gasket with specific ductility between a magnetic ring blank and a core as a carrier of a lubricant, and enables the hot-deformed auxiliary gasket to be synchronously deformed with the magnetic ring blank, so that the lubricant on the hot-deformed auxiliary gasket can move along with the deformation of the hot-deformed auxiliary gasket, the cracking and falling problems caused by the insufficient ductility of the lubricant due to the deformation of the magnetic ring blank are avoided, the inner wall surface quality of the magnetic ring is significantly improved, the grinding amount during later processing is reduced, and the utilization rate of the magnetic ring blank is improved. Meanwhile, the hot-deformed auxiliary gasket can fill the low-performance area of the cup opening of the magnetic ring during the hot-deformation process, the radial pressure received by the blank cup opening when the blank cup opening is ringed is uniform, the performance of the cup opening of the magnetic ring is guaranteed, the removal amount of the cup opening during the later processing of the magnetic ring is significantly reduced, and the utilization rate of the magnetic ring blank is greatly improved.
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Citation Information

Patent Citations

  • Methods to improve the performance and axial uniformity of hot-pressed / hot-deformed radiation-oriented NdFeB permanent magnet rings

    CN103123862B

  • Manufacturing method of high-performance hot-pressed neodymium iron boron magnetic ring

    CN113996791A

  • Method for preparing regenerated anisotropic magnetic powder by recycling waste thermal deformation neodymium iron boron magnetic ring

    CN117976402A

  • Systems And Methods For Making Radially Anisotropic Thin-Film Magnetic Torroidal Cores, And Radially Anisotropic Cores Having Radial Anisotropy, And Inductors Having Radially Anisotropic Cores

    US20140240074A1