Optimization of Multiple Response Characteristics of EDM Process Using Taguchi-Based Grey Relational Analysis and Modified PSO

Electrical discharge machining is an alternative process for machining complex and intricate shapes. In this paper, an inter-relationship of various electrical discharge machining parameters, namely discharge current, pulse on and off time and dielectric flow rate on material removal rate (MRR), tool wear rate (TWR), surface finish (SRa) and dimensional tolerance using a Taguchi–Grey relational analysis. The response surface methodology is used to develop a second order model for MRR, TWR and SRa in terms of process parameters. Finally, a multi-objective optimization problem is formulated by using MRR, TWR and SRa. The multi-objective problem is then optimized through a modified particle swarm optimization (PSO) algorithm to find the optimum level of parameters. In this research, the results of the proposed method are validated through confirmation experiment. The work piece material used for experimentation is stainless steel of S304 grade.

[1]  Y. S. Tarng,et al.  Optimization of the electrical discharge machining process based on the Taguchi method with fuzzy logics , 2000 .

[2]  Takahisa Masuzawa,et al.  Improved Jet Flushing for EDM , 1992 .

[3]  C. L. Lin,et al.  Optimisation of the EDM Process Based on the Orthogonal Array with Fuzzy Logic and Grey Relational Analysis Method , 2002 .

[4]  N Tosun,et al.  Determination of optimum parameters for multi-performance characteristics in drilling by using grey relational analysis , 2006 .

[5]  C. J. Luis,et al.  Material removal rate and electrode wear study on the EDM of silicon carbide , 2005 .

[6]  S. M. Pandit,et al.  Verification of On-Line Computer Control of EDM by Data Dependent Systems , 1987 .

[7]  W. D. Liu,et al.  Machining Characteristics of Al2O3/6061Al Composite using Rotary EDM with a Disklike Electrode , 2000 .

[8]  Yoke San Wong,et al.  Effects of flushing on electro-discharge machined surfaces , 1995 .

[9]  T. Mizutani,et al.  The development of an electrodischarge machine for micro-hole boring , 1986 .

[10]  Sehijpal Singh,et al.  Application of Taguchi method for optimisation of powder mixed electrical discharge machining , 2005, Int. J. Manuf. Technol. Manag..

[11]  C. Fung.  Manufacturing process optimization for wear property of fiber-reinforced polybutylene terephthalate composites with grey relational analysis , 2003 .

[12]  Stephen T. Newman,et al.  State of the art electrical discharge machining (EDM) , 2003 .

[13]  H. Hocheng,et al.  EFFECTS OF WORKPIECE ROTATION ON MACHINABILITY DURING ELECTRICAL-DISCHARGE MACHINING , 2001 .

[14]  B. Yan,et al.  Surface modification of SKD 61 during EDM with metal powder in the dielectric , 2001 .

[15]  J. Deng,et al.  Introduction to Grey system theory , 1989 .

[16]  Yih-fong Tzeng,et al.  A simple approach for robust design of high-speed electrical-discharge machining technology , 2003 .

[17]  J. Soni,et al.  Machining characteristics of titanium with rotary electro-discharge machining , 1994 .

[18]  Agostino G. Bruzzone,et al.  Effect of Flushing and Electrode Material on Die Sinking EDM , 1999 .

[19]  Liam Blunt,et al.  Effect of EDM process parameters on 3D surface topography , 2004 .

[20]  Robert Heinemann,et al.  Effect of MQL on the tool life of small twist drills in deep-hole drilling , 2006 .

[21]  Zone-Ching Lin,et al.  Analysis and Application of Grey Relation and ANOVA in Chemical–Mechanical Polishing Process Parameters , 2003 .

[22]  Pradeep Kumar,et al.  PARAMETRIC OPTIMIZATION OF POWDER MIXED ELECTRICAL DISCHARGE MACHINING BY RESPONSE SURFACE METHODOLOGY , 2005 .

[23]  C. Wykes,et al.  A new method of optimising material removal rate using EDM with copper–tungsten electrodes , 2000 .

[24]  Sachin Maheshwari,et al.  Some investigations into the electric discharge machining of hardened tool steel using different electrode materials , 2004 .

[25]  Omar S. Es-Said,et al.  Formation of a crater in the workpiece on an electrical discharge machine , 2002 .

[26]  K. Yada,et al.  Micro-electrodischarge machining using water as a working fluid—I: micro-hole drilling , 1986 .