Research on Statistical Parameters of 3-D<i> </i>Roughness for Micro Wire Electric Discharge Machining Surface

Abstract

Amplitude parameters and functional parameters of three-dimensionalroughness are established by statistics geometry. Since micro wire electric discharge machining (MWEDM) surface approximately follows the Gauss distribution, its statistical characteristics are different from cutting processing surface. Characterization meaning between MWEDM surface and cutting processing surface is rather different. This study begins with shape parameters’ mathematics essence of surface height distribution of three-dimensionalroughness, analyzes their definite characterization meanings for MWEDM surface, deeply researches bearing ratio curve of MWEDM surface, reasonably ascertains its functional areas and finally establishes nine functional parameters where volume parameter is the main one.