Abstract
In this paper, different optimization techniques such as multi-objective optimization based on ratio analysis, the -nD angle, information divergence and multi-angle optimization methods were considered for comparative study in order to check their variation in results. These four techniques were considered asthese techniques were made from completely different methodologies, such as MOORA, is one of the latest multi-criteria decision-making methods that cover the weakness of other older methods and the latter three (-nD angle, Information Divergence and MAOT) methods are based on trigonometric methodologies. These optimization techniques were carried out using the effect of EDM process parameters viz., material removal rate and surface roughness as output parameters and current, pulse on time, pulse off time and different electrode materials as input process parameters. These parameters were obtained from the experiments modelled according to the Taguchi experimental design procedure in which the L18 orthogonal array was used to perform experimentation with the material of titanium alloy (Ti-6Al-4V). All the optimization techniques have obtained similar results among which -nD angle and Information Divergence technique tend to be easier and understandable for any similar application. The latter two methods avoid complexity and can be used for optimizing any relevant manufacturing process parameters such as the parameters of EDM, additive manufacturing, etc.
Highlights
Published: 21 October 2021Decision-making is an important task in almost every field of engineering when there are multiple factors involved
As it is known that traditional machining results in higher tooling costs, we use ElectricalDischarge Machining (EDM), which is non-traditional machining is used to machine the material considering the economic constraints as shown in Figure 1 [22,23,24]
(Ra) is is the which is not directly considered in Surface the output outputparameter, parameter, which is not directly considered in this study, but desired values of input parameters are fixed with respect to the surface this study, but desired values of input parameters are fixed with respect to the surface roughness
Summary
Published: 21 October 2021Decision-making is an important task in almost every field of engineering when there are multiple factors involved. Discharge Machining (EDM), the input process parameters affect the output parameters. When pursuing advances in computing systems, optimization techniques have become increasingly popular and important in different engineering applications [4]. The output process parameters of the EDM were considered to optimize and find the suitable input process parameters for future machining procedures [5]. The EDM process follows a non-conventional machining procedure that removes the material from the substrate without being in physical contact with it. It is based on thermal energy by conversion from electrical energy which removes material by innumerable sparks between the tool electrode and the workpiece. In straight polarity, Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
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