Research on the Topography Model of Micro Wire Electrical Discharge Machining Surface

摘要

Micro Wire Electrical Discharge Machining (Micro-WEDM) surface consists of many approximate spherical peaks and craters with interphase distribution. According to the micro-WEDM mechanism, the surface micro-topography is simulated by using ANSYS, and the mathematical models about single crater and multi-crater are established. The formula of surface arithmetic average deviation Sa is deduced based on the overlap principle. It proves the validity of the surface micro-topography mathematical model comparing the simulation result with measurement calculation value from SPM, which can provide a new method and theoretical basis for evaluating the isotropy surface topography.