Optimisation of WEDM process parameters during machining of HCHCr steel using TOPSIS method

Sahoo, Sarat Kumar; Naik, Sunita Singh; Rana, Jaydev

doi:10.1504/ijpmb.2019.099332

Cited by 16 publications

(10 citation statements)

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“…The maximizing response variable CR and minimizing SR are considered as beneficiary and non-beneficiary attributes respectively. The positive and negative ideal solutions are nominated based on the long and short distances from ideal/best solutions [33,34]. The number of alternative solutions ('m') is 27 and the total number of attributes ('n') is 2.…”

Section: Topsis Methodsmentioning

confidence: 99%

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Influences of cryogenically treated work material on near-dry wire-cut electrical discharge machining process

Kannan

Trabelsi

Boopathi³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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In this research, influences of cryogenically treated Inconel 718 work material in near-dry wire-cut electrical discharge machining (WEDM) characteristics have been studied using argon-mist (mixing of pressurized argon gas and minimum amount of tap-water) and a reusable Molybdenum wire tool. The effect of cutting parameters (pulse width (PW), spark current(C), pulse interval (PI), and flow rate(F)) on surface roughness (SR) and cutting rate (CR) and using Box-Behnken response surface analysis. It was observed that CR and SR are increased by increasing PW, and C; conversely, reduced by increasing PI. The technique for order of preference by similarity to ideal solution (TOPSIS) method has been utilized to estimate the best parameters’ settings for improving both machining characteristics. The optimum CR (9.81 mm3/min) and SR (1.9 µm) have been obtained by optimum settings of 4 Ampere spark current, PW of 20µs, PI of 72µs, and 18ml/min of the flow rate of mixing water using the TOPSIS method. The best settings of cutting parameters obtained from the TOPSIS method were considered to compare the near-dry WEDM performance using cryogenically treated/ untreated work materials. It was observed that CR and SR of the cryogenically treated work material are 9.17% increased and 21.58% reduced than the untreated work material due to an increase in electrical and thermal conductivities.

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Section: Topsis Methodsmentioning

confidence: 99%

“…Step 1. the decision matrix has been framed from Box-Behnken method experimental observations by using equation (2). The response data is used to construct the response matrix [33].…”

Section: Topsis Methodsmentioning

confidence: 99%

Influences of cryogenically treated work material on near-dry wire-cut electrical discharge machining process

Kannan

Trabelsi

Boopathi³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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show abstract

“…The alternative which has the highest distance from the Negative Ideal Solution (NIS) and the shortest distance from Positive Ideal Solution (PIS) will be selected as best. In TOPSIS, the response parameter to be maximized is considered as the beneficial attribute, and the response to be minimized is considered as a non-beneficial attribute [58,59]. The steps of TOPSIS are explained as follows.…”

Section: Multi-objective Optimization Using Topsis Techniquementioning

confidence: 99%

“…Step 3: Weighted normalized matrix (equation 5) is calculated by assigning appropriate weights to each attribute. Always, the sum of weights should be equal to 1 [58].…”

Section: Wherementioning

confidence: 99%

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Experimental Investigation and Multi-Objective Optimization of Cryogenically Cooled Near-Dry Wire-Cut EDM Using TOPSIS Technique

Boopathi¹,

Myilsamy²,

Sukkasamy³

2021

Preprint

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In this research, the mixing of compressed air with the minimum quantity of water is used as a dielectric medium and the cryogenically cooled molybdenum wire is used as a tool in wire-cut electrical discharge machining (WEDM) to encourage the eco-friendly production, called cryogenically cooled near-dry WEDM process. The nitrogen gas-cooled wire tool is utilized to cut the Inconel 718 alloy workpiece to prevent wire breakage and maintain enough electrical conductivity. The preliminary experiments were conducted to compare wet, dry, near-dry, and cryogenically cooled near-dry WEDM processes. It was revealed that cryogenic cooled near-dry WEDM is better performance than dry, near-dry WEDM except for the wet process. The systematic experiments of eco-friendly cryogenically cooled near-dry WEDM have been conducted to analyse the effect of input factors like spark current, pulse-width, pulse-interval, and mixing water flow rate on material removal rate (MRR) and surface roughness (SR) using Box–Behnken method. The fitted models and response surface graphs were developed to analyse the influences of input factors on each response parameter. It was concluded that MRR and SR of cryogenically cooled near-dry WEDM are increased by maximizing spark current, pulse-width, and flow rate, conversely, both responses were decreased by increasing pulse-interval. The technique for order of preference by similarity to ideal solution (TOPSIS) technique has been applied to predict the best combination of input factors for satisfying the optimal values of both responses.

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Sustainable developments in near-dry electrical discharge machining process using sunflower oil-mist dielectric fluid

Boopathi¹,

Alqahtani

Mubarakali

et al. 2023

Environ Sci Pollut Res

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In this study, a near-dry electrical discharge machining (NDEDM) process has been conducted using compressed air mixed with a low quantity of biodegradable re ned sun ower oil (called oil-mist) to investigate the machining characteristics. The in uences of oil ow rate (OR), air pressure (AR), spark current (SC), and pulse width (PW) on gas emission concentration (GEC), machining rate (MR), and surface roughness (SR) by the Box-Behnken method. The TOPSIS (The Technique for Order of Preference by Similarity to the Ideal Solution) technique estimates the parameter optimal set for the best machining characteristics. The optimal machining parameters have been used to examine the microstructure of the machined surfaces using a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) analysis. The 0.981 mg/min of GEC, 55.145 mg/min of machining rate, and 2.43 µm of surface roughness have been attained by the 14 ml/min ow rate, 7 bar of air pressure, 10 A spark current, and 48 µs pulse duration of the sun-ower oil-mist NDEDM process.

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Optimisation of WEDM process parameters during machining of HCHCr steel using TOPSIS method

Cited by 16 publications

References 0 publications

Influences of cryogenically treated work material on near-dry wire-cut electrical discharge machining process

Influences of cryogenically treated work material on near-dry wire-cut electrical discharge machining process

Experimental Investigation and Multi-Objective Optimization of Cryogenically Cooled Near-Dry Wire-Cut EDM Using TOPSIS Technique

Sustainable developments in near-dry electrical discharge machining process using sunflower oil-mist dielectric fluid

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