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Estonian Journal of Engineering

On precision improvement by ultrasonics-aided electrodischarge machining; pp. 24–33

Full article in PDF format | doi: 10.3176/eng.2009.1.03

Daniel Ghiculescu, Niculae Ion Marinescu, Gheorghe Jitianu, George Seritan


The paper deals with increasing the precision by electrodischarge machining, aided by ultrasonic longitudinal vibration of the electrode tool. Increasing the dimensional precision of machined surfaces is strongly related to the decrease of volumetric relative wear. This essential parameter of electrodischarge machining depends on several input parameters, which are described in detail. Several optimization conditions, concerning the technological input parameters, are elaborated, aiming at the maximization of the dimensional precision through volumetric relative wear. These conditions address overall parameters as acoustic pressure, discharge energy level and power supply of the ultrasonic chain. Several technological solutions are elaborated like the synchronization of pulses with tool oscillation semiperiods, decreasing the supply power of the acoustic chain and working with frontal flat surfaces of electrodes by generating complex surfaces through 3D technological movements provided by CNC machines. All these can lead to up to 50% decrease of volumetric relative wear.


  1. Kavtaradze, O. and Lipceanski, A. Research of hydrodynamics process mechanisms in working gap under influence of ultrasonic oscillations applied on tool. Elektronnaya Obrabotka Materyalov, 1989, 120, 52–54 (in Russian).

  2. Kremer, D., Lhlaubet, C. and Moisan, A. A study of the effect of synchronizing ultrasonic vibrations with pulses in EDM. CIRP Annals, STC E, 1991, 211. http://

  3. Sundaram, M., Pavalarajan, G. and Rajurkar, K. A study on process parameters of ultrasonic assisted micro EDM based on Taguchi method. J. Mater. Eng. Performance, 2008, 17(2).

  4. Ghiculescu, D. Nonconventional Machinings. Printech, Bucharest, 2004.

  5. van Dijck, F. and Snoeys, R. Theoretical and experimental study of the main parameters govern­ing the electrodischarge machining process. Mecanique, 1975, Nos. 301–302, 9–16.

  6. Marinescu, N. I. and Ghiculescu, D. Ultrasonically assisted nonconventional machining. In Treatise of Nonconventional Technologies (Marinescu, N. I. et al., eds.), vol. 8, Bren, Bucharest, 2004, 320–351.

  7. Anton, I. Cavitation. Romanian Academy, Bucharest, 1984.

  8. Isuzugawa, K., Tsuji, M. and Horiuchi, M. High-speed photographic study of spark-induced shock waves in water. In Proc. 9th International Symposium for Electro Machining. Nagoya, 1989, 289–292.

  9. Mohri, N., Suzuki, M., Furuya, M. and Saito, N. Electrode wear in electrical discharge machining. CIRP Annals, 1995, 44, 165–168.

10. Suzuki, M., Mohri, N., Saito, N. and Ozaki, Y. Thermal machinability and electrode wear material in EDM. In Proc. 2nd International Conference on Die and Mould Technology. Singapore, 1992, 403–412.

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