Electrical discharge machining of a deep groove is generally difficult by the conventional method, since the removal of debris generated during the machining becomes more difficult with an increase of the groove depth.
EDM of groove with a rotating disk electrode is proposed in this paper and the performance of this method is experimentally investigated, comparing with that of conventional method. Main conclusions obtained in this study are as follows;
(1) The bottom profile of groove machined with a rectangular electrode has complex undulation along the groove, since the smooth flow of dielectric fluid is obstructed.
(2) Stable EDM of groove is attainable with a rotating disk electrode, since the smooth flow of machining fluid leads to effective removal of debri.
(3) The machining time of EDM with a rotating disk electrode is shorter than that of EDM with a rectangular electrode for larger number of revolution.
(4) The groove of setting depth can be generated by controlling the depth of cut according to the analysis of electrode wear in EDM with a rotating disk electrode.
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