H Moradi - Graduate Student School of Mechanical Engineering,Sharif University of Technology, Azadi Ave.,Tehran, Iran
M.R Movahhedy - - Associate Professor
G.R Vossoughi - - Associate Professor

Modeling of the Chatter vibration in machining processes is essential for suppression of this undesirable phenomenon. In this paper, orthogonal cutting process is modelled as a single degree of freedom dynamic system. A nonlinear delay differential equation is presented that models flank wear of the tool. Results of stability analysis for two distinct cases of a sharp tool and a worn tool are presented and compared. In addition, the effect of machining parameters such as tool wear length and cutting velocity is discussed in this analysis. It can be shown that in the case of a worn tool, the system is more stable.

Regenerative Chatter, Nonlinear Model, Tool Wear, Stability analysis