Empirical Modeling of High-speed WEDM Finishing in Gas

This paper aims at getting the finishing process models in HS-WEDM in gas. Using cutting speed and the roughness Ra as index, the five factors of pulse-on time, peak current, offset, pulse interval ratio and worktable feed were chosen in dry finishing. The effects of the five factors and their interaction on cutting speed and the Surface roughness Ra and empirical models for cutting speed and roughness Ra were developed by performing a designed experiment based on the central composite design (CCD) experiments, significant order influencing cutting speed and roughness were found. The results of the verification test show that Ra Regression Model and Cutting Speed Regression Model have high reliability, and can achieve significant prediction effect, more accurate mathematical models are provided for the further HS-WEDM process research.