Abstract
Electric discharge machine (EDM) or may be call electric spark machine is one of the most important cutting process or manufacturing process because it gives high accurate dimension and can be produced the most complex shape. In this present material removal rate and surface roughness for tool steel AISI L2 studied. The input parametric for this process is current, pulse on time (Ton) and pulse off time (Toff).A full factorial method is used to formulate machine parameters and find the optimal process parameters of an electric spark. The result shows that the Surface roughness increasing with increasing current and pulse on time is increases while no effect by increase in pulse off time. Best surface roughness when using low current and pulse in time. The material removal rate is increasing with increasing in current and pulse on time while decreasing when pulse of time is increased. The experimented and predicted values by using Minilab17 software of this process are approximately equal.
Highlights
Electric spark machine (EDM) is non-traditional, thermal electric machine
Electric discharge machines can be classified into two types, die sinking Electrical discharge machining (EDM)'ed and wire EDM [1].Wire-EDM applications almost like the cutting by electrical saw while in die-sinking the workpiece is taken the same shape in the tool electrode
Fadhil found the best value of Material removal rate (MRR) and Ra was found by using Gr powder, whereas the best value of EWR was found by using Al2O3 powder she seen MRR and surface roughness (SR) increasing with any rise in the current [9]
Summary
Electric spark machine (EDM) is non-traditional, thermal electric machine. It's used in wide range number of industrial applications. The performance of the EDM process is mainly affected by many electric parameters as far as current, polarity, Voltage, Pulse on time, Pulse off time, Electrode gap and non electrical parameters such as workpiece and tool material, dielectric liquid pressure. All of these parameters (electrical and non-electrical) has a significant impact on the EDM'ed output response like surface roughness (SR), Metal removal rate (MRR) [6].Many research was done on this topic as B. Fadhil found the best value of MRR and Ra was found by using Gr powder, whereas the best value of EWR was found by using Al2O3 powder she seen MRR and SR increasing with any rise in the current [9]
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