Breathing type pulse sintering furnace for grain boundary diffusion of elevator traction machine thick magnet
By designing a heat dissipation and insulation system and a feeding mechanism for a breathing pulse sintering furnace, combined with an alternating temperature field and a non-uniform coating, the problems of insufficient penetration depth and low heat exchange efficiency in thick NdFeB magnets have been solved. This has enabled efficient grain boundary diffusion and feeding processes, and improved the coercivity and thermal stability of the magnets.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for processing thick NdFeB magnets suffer from a sharp increase in the penetration resistance of heavy rare earth elements, resulting in insufficient deep penetration into the core, low heat exchange efficiency, and the tendency for materials to melt and become blocked during high-temperature feeding. This makes it impossible to meet the high coercivity and thermal stability requirements of high-power motors.
The breathing pulse sintering furnace is adopted. Through the design of heat dissipation and heat preservation mechanism and feeding mechanism, the furnace space and airflow can be dynamically adjusted. Combined with alternating temperature field and non-uniform heavy rare earth coating, it overcomes the penetration resistance and improves the penetration depth. A cooling system is used during the feeding process to prevent the material from melting.
It improves the coercivity consistency of thick magnets, solves the problem of insufficient penetration depth, ensures the smooth progress of high-temperature feeding, and enhances heat exchange efficiency and material transfer reliability.
Smart Images
Figure CN122408455A_ABST