Methodology for database development for electro discharge boring of aerospace material
by Sudhanshu Kumar; Harshit K. Dave; Keyur P. Desai
International Journal of Materials and Product Technology (IJMPT), Vol. 56, No. 4, 2018

Abstract: In the present investigation, boring of an aerospace material (Inconel 718) is performed on electro discharge machine. Boring operation of predrilled circular cavity is achieved using tool movement on radial path during EDM process. The actuation of tool electrode is guided and controlled in such a way that it moves on a radial path with an angular increment of five degree from previous path. Using Taguchi design of experiment and application of multiple regression equations, a database is generated for the selection of suitable combination of process parameters for boring operation in EDM process. The criterion of creating the database for proper selection of parameters is to minimise the overcut while maintaining the surface roughness within the specified range during boring operation. In this methodology, the parameters that have lesser influence on surface roughness are identified and then their levels are suitably chosen for minimum overcut generation. Remaining factors levels are varied in such a way that the surface roughness will remain within the specified range. This type of technological database will be very useful for application in the future, as it will provide direct selection of appropriate combination of parameters for boring of Inconel 718 using EDM process.

Online publication date: Thu, 31-May-2018

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