Research On Meso Scale Turning Precision And Error Control

Definition of meso scale is that the size of parts is in the range of 0.1~10mm,and the size of characteristics is in the range of 0.01~1mm,which is between micro scale and macro scale.In recent years,with the development of the miniaturization of products,application of meso scale components in biomedicine,information communication,aerospace,military and other fields of high-tech electronic products are more and more widely.Micro cutting is capable for manufacturing 3D features,such as deep hole,deep groove,free surface,and it has little limit with the materials of work piece.Thus,many scholars of various countries have turned to the field of micro cutting,making the micro cutting technology has become a research hotspot in recent years.Because of several reasons,such as the small size of part and tiny feed rate,the machining mechanism of meso scale milling is different with that in macro scale.Such situation,named size effects,has a great influence on machining accuracy.In addition,meso scale part has many structures,and high requirement of accuracy.A lot of error sources affect the machining precision during multistage machining.All of these result in difficulties of accuracy control.To deal with this problem,series of researches have done in this paper:(1)mesoscale Turning Force Prediction ModelFirst,we analysed the relationship between friction and cutting angle in mesoscale turning process,and simplified the cutting and the entire model;then established the unit cutting force model of mesoscopic turning.By seek further calculations amazing cutting force throughout the cutting process,and verified by experiments(2)WorkpieceTolerance Forecast in mesoscale TurningBy analyzing the micro-turning process workpiece geometry changes by turning and cutting force generated by the main cutting force,feed two directions Resistance cutting force decomposition,perfected in mesoscale modeling turning cutting force,and by mesoscopic structures turning and cutting force measurements of experimental platform for testing had a fine shaft parts in the process of turning the actual turning force to verify the correctness of the cutting force prediction model,but also explores the mesoscopic scale turning three elements specific impact of cutting forces.We found a variation of the cutting force on the cutting parameters.Meanwhile,the cutting force prediction model and has established a unique feature of turning under the same macro-force model accuracy and mesoscopic scale,it can satisfy mesoscale Turning Force Prediction demand to fill the previous gaps in this regard.(3)Deformation Simulation of micro-Shaft in mesoscale TurningThe deformation of weak rigidity is relatively bigger in cutting process,this article started from the theory,simulation and experimental,established the solution of the model of deformation of the stiffness weak workpiece caused by cutting force.For predictable results,calculate and design the corresponding cutter compensation track,and finally through the test mode,the compensation trajectory prediction results are verified.All of the researches in this paper supports for the implementation of the meso scale turning process optimization.