International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 02 | Feb 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 2365 A Systematic Review on Powder Mixed Electric Discharge Machining (PMEDM) Process Mohit Varma 1 , Aniket Kabara 2 , Pankaj Kumar 3 1 B. Tech Scholar, Department of Mechanical Engineering, Arya Institute of Engg. & Technology, Rajasthan, India 2 B. Tech Scholar, Department of Mechanical Engineering, Arya Institute of Engg. & Technology, Rajasthan, India 3 Asst. Professor, Department of Mechanical Engineering, Arya Institute of Engg. & Technology, Rajasthan, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract The electric discharge machining is also called as spark eroding mechanism. The use of thermoelectric source of energy in developing the non-traditional techniques has greatly helped in achieving an economic machining of the extremely low machinability materials and difficult jobs. The process of material removal by controlled erosion through a series of electric sparks, commonly known as electric discharge machining. Thermal energy gets produced as a result of applied electrical energy in EDM. Therefore, to enhance the process efficiency there should be improvement in different process parameters and also there should be improvement in the performance of different major component of process. The study discusses about having an overview of the EDM mechanism, its process parameters, and how to improve performance of dielectric fluid by adding various additives in it. After reviewing, according to results it has been observed that process efficiency can only be improved by optimizing the process parameters and addition of additives to the dielectric fluid. Key Words: EDM, PMEDM, mechanism, electrode, dielectric 1. INTRODUCTION Electric discharge machining (EDM) is an unconventional machining process which is mainly used for hard material which is difficult to machine by conventional methods like hardened steel, carbide, Inconel based super alloys etc. EDM is non-contact machining operation which is used in industry for high precision products especially in manufacturing industries, aerospace and automotive industries, communication and biotechnology industries [1-7]. No relative hardness between tool and work piece is required as there is no contact between tool & work piece. Due to this non- contact nature there is no force and vibration during machining process [8]. And this force free nature of machining process allows a soft and easy to machine electrode materials to machine a very hard, fragile or thin work pieces [9-11].EDM is a thermal process which makes use of spark discharges to erode material from the work piece surface [5, 12, and 13]. EDM is a high precision process in which the replica of tool can be achieved on the work piece. The general limitation of the process is that it is applicable only for conductive or some semi conductive work piece & tool materials [4, 5]. EDM machine has broad application in the production of die cavities and other pré cised complex parts. Material removal takes place due to repetitive produced sparks between tool and work piece. The produced sparks are non- continuous in nature and a series of sparks occurs within a short span of time. The tool and electrode both are submerged in dielectric like kerosene, paraffin oil, unionized water etc. [5, 14, 15]. Fig -1: Schematic diagram of EDM.