IMPROVED MODELING OF CUTTING FORCE COEFFICIENTS IN PERIPHERAL MILLING

Titanium is one of the most widely used metals in the aircraft and tur bine manufacturing industries. Accurate prediction of cutting forces i s important in controlling the dimensional accuracy of thin walled aer ospace components. In this paper, a general three-dimensional mechanis tic model for peripheral milling processes is presented. The effects o f chip thickness, rake angle and cutting geometry on chip flow, rake f ace friction and pressure, and cutting forces are analyzed. A set of c losed form expressions with experimentally estimated cutting force fac tors are presented for the prediction of cutting forces. The model is verified experimentally in the peripheral milling of a titanium alloy. For a given set of cutting conditions and tool geometry, the model pr edicts the cutting forces accurately for the chip thickness and rake a ngle ranges tested.