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Brittle material because of its high mechanical strength, good chemical resistance , high temperature resistance , corrosion resistance, low coefficient of thermal expansion , is now widely used in aerospace , communications , biomedical and other high-tech industries. However, due to its brittleness, hardness, fracture toughness is low, typical of difficult to machine materials . Glass is a brittle material , the glass member is currently the main methods of processing precision and ultra-precision grinding , grinding, polishing , and the use of hydrofluoric acid etching the glass surface , these methods are mostly processing cycle is long, the cost high pollution of the environment . Micro- milling , high efficiency, flexible large , as well as the diversity of processing materials , has been more widely used. In this paper, micro- milling method of glass for plastic processing , micro- milling of glass material in the process of brittle ductile transition critical condition while studying micro- milling parameters on cutting force and machined surface roughness were investigated. On crack propagation mechanism of brittle materials based on the analysis of micro-diameter ball mill for milling plastic glass studied the mechanism established to consider the tool inclination angle Ball End Milling force model , determined by testing the model of milling force coefficient, theoretical calculations and experimental results of milling force milling forces were compared to verify the rationality of the model . Regression orthogonal rotary test methods , select the spindle speed, depth of cut , feed rate , tool tilt angle variables studied milling parameters for glass brittle ductile transition critical conditions, have been able to carry plastic glass micro- milling machining parameter range . Regression orthogonal rotary surface roughness test method to establish a regression model , based on the response surface methodology was milling parameters on surface roughness were investigated. Using single factor method examined the milling parameters on milling force of impact , the use of regression orthogonal rotation combination design method of milling force fitting experimental model , and verify its legitimacy . The same time through a series of experiments to study the processing of brittle materials in the form of tool wear and wear mechanism for subsequent practical application provides some guidance and reference .
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