Study on Combined Process of Ultrasonic Vibration-Pulse Discharge-Grinding

摘要

Sintered Nd-Fe-B magnet is the third generation rare earth permanent magnetic material. The combined process of ultrasonic vibration -pulse discharge-grinding is studied in this paper. The equipment for the ternary combined process is developed,including grinding wheel,pulse power,grinding tool and constant pressure feeding device. According to the experiment results,the change trend of material removal rate and normal grinding force was analyzed; contrasted with grinding process,the micro structure of machined surface of combined process was studied; the dressing of CBN grinding wheel was researched,and the advantage of pulse discharge dressing was pointed out.