International Journal on Emerging Trends in Mechanical & Production Engineering Vol. 1, Issue 1 - 2017 © Eureka Journals 2017. All Rights Reserved. www.eurekajournals.com ESTIMATION OF MACHINING COST WITH ENHANCED SURFACE FINISH IN WEDM FOR INCONEL 800 ARCHISMAN DASGUPTA * , PRASENJIT DUTTA ** ABSTRACT Wire EDM is a widely used non-conventional machining process in manufacturing industries where precision is the foremost criteria. On the other hand, the decrease in consumable items required to complete the machining process by maintaining the precision level has always been a challenging task for manufacturing industries. The total machining cost for a product is dependent on the machining time taken with respect to the consumption of power, wire electrode and dielectric fluid to complete the machining process. Now, an experimental study, analysis and practical measurements of all the Wire EDM consumables for the machining process has been done to find out the approximate amount of machining cost. This experimental work is projected on the determination of optimum machining parameters with respect to the less machining time and machining cost for best surface finish. The design for the experiment is scheduled by Taguchi’s orthogonal array L18 to cut the workpiece linearly up to 10 mm by means of zinc coated wire. Later on Response optimization method is used to find out the best combination of machining parameters and these machining parameters were validated by using oscilloscope for the justification of the actual units and correctness in time signals (pulse on/ off time). KEYWORDS: Wire EDM, Oscilloscope, Machining Consumables, Total Machining Cost, Surface Roughness, Response Optimization. INTRODUCTION Inconel 800 is a combination of iron-nickel- chromium with moderate strength (ultimate tensile 585 MPa and yield strength 276 MPa) and good resistance to oxidation and carburization at elevated temperatures. During the machining operation, the machining zone is continuously flushed with water passing through the nozzles on both sides of the workpiece. The spark discharge across the workpiece - wire electrodes causes ionization of the water which is used as a dielectric medium. It is an important note that ionization of water leads to the rise in water conductivity. A resin is used as an ion exchange in dielectric distribution system, in order to prevent the raise in conductivity and to keep the conductivity of water constant. * M Tech Student, Production Engg. Dept., National Institute of Technology Agartala, Tripura-799046, India. ** Assistant Professor, Production Engg. Dept., National Institute of Technology Agartala, Tripura-799046, India. Correspondence E-mail Id: editor@eurekajournals.com