AN ANALYTICAL MODEL FOR PREDICTION OF TOOL TEMPERATURE-FIELDS DURING CONTINUOUS AND INTERRUPTED CUTTING

An analytical model for prediction of tool temperature fields in metal cutting processes is developed. The model can be applied to any conti nuous or interrupted three-dimensional cutting process. To accurately represent the heating and cooling cycles encountered during interrupte d cutting, the analysis predicts time dependent heat fluxes into the c utting tool. A time history of this heat flux is obtained by performin g an energy balance on the chip formation zone. The variation with tim e of the tool temperature fields is determined from a heat transfer an alysis with prescribed heat generation rate. The analysis requires the cutting forces as inputs. The model tool-chip interface temperatures agree well with the experimental tests reported in the literature, for all cutting conditions and work materials investigated. The results i ndicate that the tool-chip interface temperature increases with cuttin g speed during both continuous and interrupted cutting.