Energetic Consideration of the Spark Erosion Using Different Process Energy Sources and Pulse-Unit-Gap Conditions

Abstract

The energetic calculations of pulse energies are only very rough approximations in many publications, because some boundary conditions are not known or are not considered. In the paper is shown that problems resulting from the choice of process energy source and the supply-gap conditions. Approximations that were still considered for long pulse durations, for example, can for micro and nanoEDM no longer be accepted. The smaller the pulse energy, it can also not allow for the simulation of a linear rising enthalpy may be used. The shifts between the measured current and voltage must not be neglected. Practical tests to have shown, that the peak of the energy input is shifted in time and the maximum is lower by about 70%. The parasitic capacitances of the connection pulse unit - working gap and electrode arrangement results in the largest errors in the power calculation. It follows that the connection conditions of industrial plants may not be changed or should be recalculated.