Optimization And Experimental Research On Micro Parts Of High-hard Material

With the application of high-speed cutting technology has become more widespread,the research on high speed machining of titanium alloy has got more attention, this paper takes titanium alloy Ti6Al4 V as the research object, then carry on the research of process optimization and experimental technology.Firstly, for the characteristics of titanium alloy materials, we will make an analysis of the causes of shear localization and the formation of serrated chips. The cutting process of micro parts is more complex, therefore, analyze the deformation characteristics of each deformation zone near the tip and the formation of chips in the micro-cutting process.By means of single factor experiments and orthogonal experiments, the influence rules of cutting parameters including spindle speed?cutting depth?feed rate to cutting force are analyzed during high speed cutting titanium alloy Ti6Al4 V through the micro-milling machine tool. From the analysis of results can known that: spindle speed makes maximum effect on cutting force, followed by cutting depth, feed rate has the minimum effect.By means of single factor experiments and orthogonal experiments, the influence rules of cutting parameters including spindle speed?cutting depth?feed rate to surface roughness are analyzed during high speed cutting titanium alloy Ti6Al4 V, in conclusion that: feed fate has the most remarkable influence on surface roughness, followed by spindle speed, the last is cutting depth. Then optimal parameters are obtained. The predictive model of surface roughness is set up by the results of orthogonal experiments:Ra=0.0935n-0.0831ap-0.1713vf0.1302the model has higher significance.Finally, the milling parameter optimization methods are introduced, including the objective function?restrictions etc.