Abstract
A new machining method that combines textured surface and water lubrication is proposed in this paper to improve the friction characteristics of ground silicon carbide (SiC). The effects of water film thickness and grinding speed on the nano-machining behavior of monocrystal cubic SiC are revealed using molecular dynamics simulation. Moreover, a Rayleigh chip thickness model is employed to predict surface roughness. According to the obtained results, friction characteristics and machinability of textured samples are strengthened compared with the non-textured sample. Behavior characteristics are further improved in water-lubricated conditions, which show that the temperature, grinding force, and friction coefficient decrease, while the hydrostatic stress and the von Mises stress increase. Therefore, tool wear and sub-surface damage are improved. Furthermore, an improved material removal performance is also achieved under high-speed grinding. Lastly, it is observed that surface roughness of ground SiC is improved in water lubrication and under high-speed grinding.
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