Identification of roughness parameter when turning process with helical cutting edge for machining of automotive transmission parts

Abstract This article describes process of identifying of the value of roughness parameters from basic kinematic and geometric characteristics of turning process with tool with helical cutting edge. The final mathematical formula is deduced from graphic sketch of turning process and consequently identified using all the known geometric and kinematic parameters. This formula can be used to theoretic evaluation of geometric and cutting parameters influence on the quality of machined surface determined by roughness characteristic of theoretic parameters.