Study the effect of electrical current on average surface roughness of borosilicate glass at edm machining and comparison using matlab program

Abstract EN

Machining of electrically non-conducting materials like glass is still a major problem.

The principle of electric arc was used to generate high electrical discharge (spark) at high currents to machine non-conducting materials at any hardness.

EDM system was built for machining of non-conducting cutting materials such as glass including the use of powder (graphite) mixed for dielectric solution (tap water) by supplied DC current values (200, 250, 300, 350 and 400A).

Voltage of (70V) was used to cut 3mm thickness of borosilicate glass (BSG) to obtain the average surface roughness (Ra) of about (0.003-0.012μm).

Mat lab program has been used to investigate the process control for EDM that could the Ra experimental and theoretical with accuracies of 94.236, 94.034, 96.628 and 92.875% respectively.

From the reading of the magnitude of the roughness it was found that differences between the theoretical and experimental values for 3mm thickness of BSG was never exceed (8%).