Effect of Ultrasonic EDM on Machinability of Coarse PCD
For a purpose to improve electric discharge machinability of PCD composed of coarse (25μm) diamond particles,which has been thought to be extremely difficult to EDM,in this study,a method (US-EDM) to give an ultrasonic vibration to an electrode in axial direction,flexural direction and complex direction that couples axial and flexural directions was attempted.As a result,it was found that EDM efficiency could be improved to 6 times higher (0.065mm3/min) than a standard efficiency (0.011mm3/min) obtained in machining conventional PCD (C-PCD) and the electrode wear could be reduced to 1/2 by giving vibrations to the electrode in axial direction (frequency f=28kHz,amplitude δ=18μm).Further,this method (US-EDM) was applied also to a new PCD (EC-PCD) composed of electrically conductive diamond particles.As a result,it was made clear that EDM efficiency could be improved to 0.22mm3/min.This value is equivalent to approximately 5 times higher efficiency obtained in the machining of ordinary die steel and cemented carbide materials.
EDM electrically conductive PCD copper electrode ultrasonic vibration material removal rate electrode wear
Manabu Iwai Shinichi Ninomiya Zhirong Zhou Kiyoshi Suzuki
Toyama Prefectural University,Imizu,Toyama 939-0398,Japan Nippon Institute of Technology,Miyashiro,Saitama 345-8501,Japan
国际会议
杭州
英文
362-367
2013-09-23（万方平台首次上网日期，不代表论文的发表时间）