A ROBUST OPTIMISATION-EFFICIENCY-DECISION SCHEME FOR ELECTROHYDRAULIC FORMING USING HYBRID TAGUCHI-DATA ENVELOPMENT ANALYSIS-PARETO METHOD FOR ALUMINIUM ALLOY 1100 SHEETS IN AUTOMOTIVE PANELS

Olusola Michael  Adeyemi; Boluvar  Lathashankar; John Rajan; Swaminathan Jose; Sunday Ayoola Oke

doi:10.30572/2018/KJE/150311

Authors

Olusola Michael Adeyemi Department of Mechanical Engineering, University of Lagos, Lagos, Nigeria
Boluvar Lathashankar Department of Industrial Engineering and Management, Siddaganga Institute of Technology, Tumkur-572103, Karnataka, India
John Rajan Department of Manufacturing Engineering, School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India
Swaminathan Jose School of Mechanical Engineering, Vellore Institute of Technology, Vellore, India
Sunday Ayoola Oke University of Lagos, Lagos, Nigeria https://orcid.org/0000-0002-0914-8146

DOI:

https://doi.org/10.30572/2018/KJE/150311

Keywords:

Parameter, setting, optimisation, forming, process, Aluminium-Zinc alloy

Abstract

This paper proposes a hybrid T-DEA-P (Taguchi-Data Envelopment Analysis-Pareto) method to optimise and rank parameters of the electrohydraulic forming process using the aluminium (AA1100) sheets for automotive panel application. A linear programming model was formulated based on the integrated Taguchi – DEA data and solved using DEA software. The design variables are the stand-off distance, electrode gap voltage and medium. The constraints are formulated according to the levels specified in the level-factor table. Using literature data, the validation of the method was made. An important result shows that case 1 has the optimal parametric setting is SOD3E2V2M2. This is interpreted as a stand-off distance of 3mm, an electrode gap of 30mm a voltage of 260 volts and the medium as Oil with a viscosity of 0.89cP. The delta values are 16.026, 16.0605, 17.1109 and 37.3587. Delta values measure the rate of change of the average signal-to-noise ratios relative to the changes in levels. Based on the Pareto intervention, the medium is ranked first while voltage, electrode gap and stand-off distance are ranked second, third and fourth, respectively. The method aids in the planning activity for the forming process.

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