Study of the High-Efficiency Ejecting-Explosion EDM of SiCp/Al Composite

SiCp/Al composites have excellent physical properties and are widely used in aerospace other fields. Because of their poor machinability, they often machined by non-traditional machining methods such as electrical discharge (EDM). In the process EDM, due to “shielding” effect reinforced particles SiC, local ejection force is low during processing process, it difficult throw smoothly, which ultimately leads a material removal rate surface quality. this paper, high–low-voltage composite ejecting-explosion EDM power supply developed explore explosive unique law explosion process. The experiment platform uses self-developed CNC machine tools based on an ejecting-explosive supply, influence detonation-increasing wave with different volume fractions was studied changing four factors: open-circuit voltage difference, pulse current phase width difference back behind step front. roughness were measured. research results showed that could be increased 164.63%, 30.03% adjusting high from 1 A 8 A. When between (HLW) pulses increases 40 V 120 V, can 150.39%, 20.49%. increase difference. With peak becomes faster at first then slower. materials growth