Cutting Process Tribometer Experiments for Evaluation of Friction Coefficient Close to a CFRP Machining Operation

To address the lack of friction coefficient at the tool/workpiece interface, a cutting process tribometer (CP-T) is utilised. This tribometer enables for friction measurements between diamond-coated cemented carbide pins and freshly generated CFRP surfaces downstream of a orthogonal cutting process. The tribological conditions in the measurement setup (e.g. velocity, pressure and presence of loose particles) are very similar to those occurring at the tool/workpiece interface during the cutting process. It is shown that the magnitude of friction coefficient as well as the influence of the fibre orientation is much lower compared to results of pin-on-disk tribometer (POD-T) experiments. This measurement data is of high relevance for machining force and wear modelling as well as cutting process optimisation.