Nonlinear dynamics in orthogonal turning process

In this paper, the nonlinear dynamics methods were applied to analyze the experimental data captured during the orthogonal turning process. The analyzed data were the acquired time series represented by the cutting and thrust forces acting on the cutting tool. Workpieces of aluminum alloy, ductile cast iron, and gray cast iron were machined. The false nearest neighbors and the largest Lyapunov methods were considered to study the nonlinear phenomena occurring in turning process. An index of stability was also defined and used to compare the turning processes of all tested workpieces.