A Review Paper on Optimization of Process parameters in EDM of heat treated carbon tool steel (KEY IJP************834)

• Sumer Singh

Abstract

Manufacturing with machining contributes to a larger extent in most of the industry as even the formed parts needs finishing by removal of material. The conventional machining processing involving common machine tools is making use of modern technology high production through better tooling and computer numerical control machining. The conventional material can be process with normal tools and machined with ease and little stress on the system. But special alloys, with high hardness and toughness are difficult to be worked on by these machines. Especially heat treated components acquire such a high degree of surface hardness that these are impossible to be cut with the best of tool materials available as on date. To take care of these challenges, modern machining method has be evolved using non-conventional approaches for metal removal, such as Electric discharge machining (EDM). In this work, experiments are carried out to investigate the effect of process parameters on material removal rate of machined workpiece specimens and it is observed that the rate of material removal rate is calculated with high degree of accuracy after the machining process. The experiments are performed on ZNC-250 die-sink electric discharge machine for EDM drilling of carbon tool steel workpiece using copper rod as electrode. Experiments are designed using fractional and full factorial design of experiment (DOE) and experimental runs were conducted for various combinations of process parameters such as current (I), pulse on time