Parametric optimization of EDD using RSM-Grey-TLBO-based MCDM approach for commercially pure titanium. Issue 2 (6th April 2020)

• Record Type: Journal Article
• Authors: Sharma, Neeraj; Ahuja, Neeraj; Goyal, Rachin; Rohilla, Vinod
• Is Part Of: Grey systems. Volume 10:Issue 2(2020)
• Page Start: 231
• Page End: 245
• Publication Date: 2020-04-06
• Subjects: DR -- EDD -- EWR -- Titanium grade-2 -- TLBO; Cybernetics -- Periodicals; Systems engineering -- Periodicals; 003.5
• DOI: 10.1108/GS-01-2020-0008
• Languages: English
• ISSNs: 2043-9377

Abstract

Abstract : Purpose: Electric discharge drilling (EDD) is used to drill quality microholes on any conductive materials. EDD process parameters play a crucial role in the drilling. Depending upon the material characteristics, the cost of drilling also changes. Therefore, a suitable method is required to control the process parameters and drill quality microholes. Design/methodology/approach: The input process parameters in the present work are peak current (Ip), pulse on-time (Ton) and pulse off-time (Toff). The trials were intended in accordance to central composite face-centered design of response surface methodology (RSM). The output responses, namely drilling rate (DR) and electrode wear ratio (EWR), were converted into a single response, that is, grade using Grey relational analysis (GRA). The grade value is further modeled by regression analysis. The empirical model was figured out using teaching–learning-based optimization (TLBO). The RSM-Grey-TLBO-based multicriteria decision-making (MCDM) is used to investigate the optimized process parameter setting. Findings: The RSM-Grey-TLBO-based MCDM approach suggests that the optimized setting for DR and EWR is Ip: 3A; Ton: 40 µs; Toff: 42 µs. The percentage errors for the predicted and experimental results are 8.1 and 7.5% in DR and EWR, respectively. Originality/value: The parametric optimization of EDD using RSM-Grey-TLBO-based MCDM approach while machining commercially pure titanium is still underway. Thus, this MCDM approach will give a path to the researchers working in this direction.