EDM with USM Combination Process of Sintered NdFeB Permanent Magnet
This paper presents an experimental investigation of the machining characteristics of sintered NdFeB permanent magnet using a combination process of electro-discharge machining (EDM) with ultrasonic machining (USM). Concentration of abrasive in the dielectric fluid is changed to explore its effect on the material removal rate (MRR). MRR of EDM /USM, conventional EDM are compared, machined surface characteristics are also compared between them. It is concluded that the combination EDM/USM process can increase the MRR and decrease the thickness of the recast layer. In the combination process, an appropriate abrasive concentration can improve its machining efficiency.
L. Li et al., "EDM with USM Combination Process of Sintered NdFeB Permanent Magnet", Applied Mechanics and Materials, Vols. 44-47, pp. 1066-1069, 2011