Modeling and optimization of wire electrical discharge machining of γ-TiAl in trim cutting operation

2008 ◽  
Vol 205 (1-3) ◽  
pp. 376-387 ◽  
Author(s):  
S. Sarkar ◽  
M. Sekh ◽  
S. Mitra ◽  
B. Bhattacharyya
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Wire Electrical Discharge Machining ◽  
Modeling And Optimization ◽  
Cutting Operation ◽  
Trim Cutting

A Hybrid Approach for Process Optimization in Taper Cutting Operation Using Wire Electrical Discharge Machining

2014 ◽  
Vol 619 ◽  
pp. 83-88 ◽  
Author(s):  
Bijaya Bijeta Nayak ◽  
Siba Sankar Mahapatra
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Hybrid Approach ◽  
Angular Error ◽  
Wire Electrical Discharge Machining ◽  
Ann Model ◽  
Marquardt Algorithm ◽  
Input Parameters ◽  
Cutting Operation ◽  
Wedm Process

Angular error is a major concern for the tool engineers during the taper cutting operation in wire electrical discharge machining (WEDM) process. Due to the complexity and non-linearity involved in the process, it is difficult to obtain good functional relationship between responses and process parameters. To address this issue, the present study proposes artificial neural network (ANN) model to determine the relationship between input parameters and output response. Bayesian regularization is adopted for selection of optimum network architecture because of its ability to fix number of network parameters irrespective of network size. Levenberg-Marquardt algorithm has been used to train the ANN model and the resulting network has good generalization capability minimizing the chance of over fitting. The model is developed based on the data obtained from a laboratory scale experimental set up. A set of six important input parameters such as part thickness, taper angle, pulse duration, discharge current, wire speed and wire tension is chosen to study the tapering operation in WEDM. Finally, a recent meta-heuristic approach known as Bat algorithm is used to suggest the optimum parametric combination for minimizing the angular error during taper cutting process in WEDM.

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