High Precision Simulation of WEDM Using Parametric Programming

This paper describes the development of a simulation method for WEDM (Wire Electrical Discharge Machining) which can accurately reproduce the discharge phenomena of WEDM on computer. The simulation process consists of searching for discharge locations, removing the workpiece and analyzing wire vibration. Since unclarified parameters such as ignition delay time, explosive force, damping coefficient, and permittivity of dielectric in simulation are difficult to measure from experiments, they were obtained by solving the reverse problem using parametric programming. With the parametric programming method, optimum parameters for simulation are searched simultaneously to minimize differences between simulation results and experimental results.