Journal of Research in Mechanical Engineering and Applied Mechanics ISSN: 3107-4510 (Online)

Author: Dr. BSV Rama Rao

Abstract: Identification of input parameters and along with its range is important task to proceed with the research work especially when some specific methods in DOE like Taguchi, RSM etc. are used. It is preferable to fix the values for few parameters to identify the remaining in non-conventional machining.  Once the selection of parameters is done, the immediate next task is the selection of range of its values. Most of the researchers prefer to have literature survey for this. But, along with the study of the literature, it is always preferable to have one procedure to select the suitable set of values in the orthogonal array as a support. Here, in this paper the selection of range of values for ‘Pulse OFF Time’ is discussed. Out of the four input parameters which are proposed to use in the experiment, three of them are assumed as static and ten experiments were conducted to determine the range for the fourth parameter. As a result of ten experiments, output parameters MRR and SR were found out for the ten unique sets of input values. Modified TOPSIS was applied on these observations and better values of T_off were identified considering high relative closeness of the method applied, along with the values of MRR and SR obtained initially, literature survey, limitations of the machine, to proceed further.