摘要
目前国内烧结钕铁硼永磁材料生产过程中普遍存在粉末颗粒尺寸分布均匀性差、气流磨工序出材率低等问题。针对以上问题,以提高气流磨制粉出材率和改善粉末颗粒尺寸分布一致性为目的,运用6σ中的试验设计(DOE)方法,对气流磨设备进行改进和工艺参数优化设计。试验结果表明,优化设计后的气流磨工艺出材率高,颗粒分布细小且均匀性好,使制备的磁体微观结构明显改善,磁性能得到显著提高,同时减少了过程材料的损耗。
At present, the problems of poor uniformity of particle size distribution and low powder output of air jet mill process are common in the production of sintered neodymium-iron-boron permanent magnet. In order to increase the output rate of the powder of air jet mill and improve the uniformity of the particle size distribution, the design of experiment method of 6o- was used to improve the air jet mill and optimize the design of the processing parameters. The experimental results show that the optimized design of the air jet mill has a high output rate, fine particle distribution and good uniformity, which can improve the microstructure of the prepared magnet, upgrade the magnetic properties and reduce the loss of the material during processing.
出处
《机械制造》
2017年第2期47-51,共5页
Machinery
