Comparative study of ultrasonic vibrations assisted EDM and magnetic field assisted EDM processes

In this investigation, the material removal rate, tool wear rate and surface integrity obtained by EDM, ultrasonic vibrations assisted EDM and magnetic field assisted EDM were studied and compared with together to show the quality of the effects of applying each of ultrasonic vibrations to tool and magnetic field around gap distance of EDM process on material removal rate, tool wear rate, and surface integrity. According to the results, applying ultrasonic vibrations to tool electrode leads to an increase of 71% in material removal rate of EDM process while applying magnetic fields around gap distance of EDM process leads to an increase of 41% in material removal rate (of course in the best conditions). Also, applying magnetic fields around gap distance of EDM process leads to a decrease of 35% in surface roughness obtained by EDM process while the surface roughness of ultrasonic vibrations assisted EDM is higher than EDM process. Also, the created surface damages in the case of ultrasonic vibrations assisted EDM is the lowest and in the case of EDM process is the highest.