Simulation and experiment study on cutting force of coated tool milling natural marble

Abstract

The simulation of coated tool milling natural marble is constructed based on Deform-3D. The influence mechanism of machining parameters on cutting force is analyzed. The results show that the error between cutting forces of simulation and experiment is within 10%, sug-gesting the reliability of the simulation results. According to the study, the cutting force decreases along with the in-crease of spindle speed while the downtrend of cutting force slows down because of workpiece work-hardening when spindle speed reaches around 3000-5000 r/min; the cutting force linearly increases with the changes of cutting depth due to the increase of axial cutting quantity; the cut-ting force increases as the increase of feed speed below 3000 mm/min. Once feed speed reaches to 3000 mm/min, the brittle-ductile transition appears, resulting in redistribu-tion on the surface which decreases the real cutting force; The empirical equation of cutting force is obtained through experimental data, which indicated that large spindle speed and feed speed, small cutting depth can reduce cutting force; the appearance of brittle-ductile transition will in-crease the surface quality and thus improve cutting per-formance of coated tool.