Actual Problems in Machine Building 2015 No. 2

Actual Problems in Machine Building. 2015. N 2 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 52 AN ALGORITHM FOR CALCULATING SURFACE ROUGHNESS IN TURNING STAINLESS STEELS IN CAD TP Zaitseva N.G., Ph.D. student, e-mail: zaicevang@mail.ru Sergeev A.S., Ph.D. (Engineering), Associate Professor, e-mail: sergeevapp@mail.ru Plotnikov A.L, D.Sc. (Engineering), Professor, e-mail: plotnikov.alexander1939@yandex.ru Volgograd State Technical University, 28 Prospect V.I. Lenina, Volgograd, 400005, Russian Federation Abstract A cutting speed effect on the roughness parameter R a in stainless steel surface turning is described in the paper. The peculiarities of the formation of the surface layer micro-geometry of parts from corrosion-resistant steels are specified. An effect of changes in thermal parameters of the machined material when the cutting speed changes, is revealed. An idea of using a natural tool- workpiece thermocouple signal from the cutting zone in mathematical models for calculating a roughness parameter as a factor in regression models, taking into account the variation of thermophysical properties of the tool and the workpiece is proposed. Mathematical models of the formation of the surface roughness parameter Ra with regard to the cutting speed factor are developed. An algorithm of automated calculation of the Ra parameter for a CNC system and the CAD TP module is also proposed. Key words thermoelectric power, mathematical model, parameter of roughness, cutting speed, thermal conductivity, algorithm, stainless steel