Parameter optimization for surface roughness of multiple cut on HS-WEDM based on genetic algorithm

High speed wire electrical discharge machining ( HS-WEDM) technique is a kind of original electrical processing technology in China. It has the advantages of low cost and simple fabrication, but its lower surface quality limits its wide utilize. Multiple cut on HS-WEDM technique can improve the machining accuracy and surface roughness. Orthogonal experiment was designed to analyze the most significant factors determining the surface roughness. Lots of single factor experiments were carried out, and formula concerning the significant factors was established and modified by the method of least squares. The best machining parameters in which the best surface roughness were analyzed using genetic algorithm in certain range. This method has high values in the practical use of HS-WEDM.