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With the changes of social needs and development of science and technology, the miniaturization of products has become a trend of globalization, in the biomedical, aerospace, defense and high-tech, electronics products has broad application pros-pects. one of the micro/meso-mechanical manufacturing technology, the micro-milling technology machining complex 3D product in the miniaturization machine tool equipment, it is cheap, low energy consumption and lower costs. However, due to its own characteristic such as the scale effect, tool edge radius effect, the minimum cutting thickness effect, the many conclusions of conventional milling is no longer applicable, so, the study for the mechanism characteristics of micro-milling process-ing has an important theoretical and practical application value.In this paper, based on an analysis of the current micro-milling technology and characteristics, using the finite element method and experimental method study tool edge radius effect, the minimum cutting thickness effect, workpiece material dy-namic mechanical properties and micro milling force. The main content is as follows:First of all, the use of numerical simulation methods, in view of the characteris-tics of micro-milling process, finite element simulation model suitable for micro-milling process is established.Secondly, based on the finite element model established, micro-milling process is simulated considering cutting edge inclination angle and cutting edge radius to study the influence on chip formation and chip morphology etc, and simulations on milling force are performed.Once again, based on the finite element model established, to explore the micro-milling process of the workpiece material dynamic mechanical properties, to analyze the strain and strain rate distribution and the stress-strain relationship of the first, second, third deformation zone and formed surface, cutting edge round zone of the workpiece materials, chip in micro-milling process.Finally, the use of orthogonal experiment method, micro-milling force to carry out orthogonal experiment, the empirical formula of slot milling cutting force is es-tablished to study the effect of cutting parameters on cutting force,and under certain conditions, to predict the the slot milling cutting force.
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