电加工钕铁硼材料的温度场与热应力研究

Electric Processing Research on Temperature Field and Thermal Stress of Ndfeb Material

钕铁硼材料属于硬脆性材料,采用传统的切削加工方式很难对其进行加工,加工过程中容易造成工件的崩裂、断裂并且内部容易产生裂纹,因此成品率低,属于难加工材料,采用电火花加工方式对其进行加工可以克服其成品率低的问题。但是,目前电火花加工效率极为低下,因此就要对电火花加工过程中的机理进行研究,在保证加工质量的前提下,提高加工效率。以前人的研究为基础,利用有限元软件ANSYS对电火花加工过程中产生的温度场进行模拟仿真,获得温度分布云图,并对其由热产生的应力进行分析。以此项研究为基础,为日后的研究或生产过程提供理论依据,从而优化加工参数,提高生产效率。

Nd-Fe-B material is hard and brittle materials, and its processing is difficult using conventional machining, and processing is likely to cause the workpiece crack, fracture and internal cracks. Therefore its low yield belongs to the difficult- to-machine materiall; however EDM processing can overcome the problem of low yield. Currently, EDM processing efficiency is extremely low, so it must study its mechanism in the EDM process, in the precondition of ensuring the quality of processing, it should improve the processing efficiency. In previous research, using the finite element software ANSYS simulation of the temperature field in the EDM process, gets its temperature contours, and analyzes the stress generated by the thermal. This study as a basis, provides a theoretical basis for future research or production process, to optimize the pracessing parameters and improve production effwiency.