Prediction of cutting forces in slotting of multidirectional CFRP laminate

Abstract

This paper focuses on experimental study of slotting of carbon fiber reinforced plastic (CFRP) laminate (G803/914) with three micrograin carbide knurled tools: fine, medium, and coarse toothings. It highlights the influence of tool geometry and cutting conditions (cutting speed and feed per tooth) on cutting forces and presents the damage that occurs to the composite material in response to mechanical effects. The experiment is made on CNC machine with cutting speed ranging from 80 to 200 m/min and feed per tooth from 0.008 to 0.060 mm/rev/tooth. The data was analyzed in order to establish empirical models showing the dependence of cutting forces on tool geometry and cutting conditions. The results illustrate that feed per tooth is the cutting parameter that presents the highest statistical and physical influence on cutting forces and that knurled tool fine toothings is the suitable tool that produces the least damage to the composite plate.