Abstract
A new combination machining method of ELID-grinding & EDM was lately proposed by the authors. As the results, grinding forces were successfully diminished in comparison with the conventional ELID-grinding. The finished surface, however, severely deteriorated due to EDM using a DC power-source, and a loss of electrodes could not be ignored. In this paper, the DC power-source is replaced by a DC-pulse power-source in order to improve the surface roughness. As the results, both the surface roughness and the loss of the electrodes are successfully reduced. The maximum downfeed, in which a stable combination machining can be performed, increases with the applied voltage for EDM. Workpiece removal rate shows the peak value at a certain table speed under the constant combination machining condition. The finishing process through the combination machining to ELID-grinding is also discussed, and the most efficient process is proposed.
