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Molecular dynamics study of the effects of tool geometric parameters on titanium nanometric cutting 预览

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摘要 A nanometric cutting model of titanium was built based on the basic principles of molecular dynamics(MD) method. EAM (embedded atom method) and Morse potential function were used, respectively, to computethe interactions between atoms. Effects and variations of different cutting edge radius and tool rake angle on sur-face morphology, system potential energy, cutting force and temperature of titanium workpiece in nanometrie cut-ting process were analyzed. Results show that: When cutting with a bigger cutting edge radius, roughness of ma-chined surface gets increased and the size of cutting force, temperature of workpiece and volume of chips will bedecreased. Titanium atoms are suffered by compressive stress and shear stress when cutting with negative and pos-itive rake angle, respectively. Positive rake angle is more conducive to cutting, and the sizes of tangential forceand normal force also have significant changes under different tool rake angle.
出处 《机床与液压》 北大核心 2015年第24期44-50,共7页 Machine Tool & Hydraulics
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