Simulation Research And Performance Analysis Of Micro-cutting Machining

The micromachining method is a method of ultra-precision machining specifically for minute parts.The uniqueness of micro-machining is even at the millimeter level to micron level,micro-cutting process there is the size effect of material and tool cutting negative anterior horn,resulting in micro-cutting The processing mechanism and the old micro-processing mechanism of the difference between the old-style processing technology and processing theory has been very accurate expression of micro-cutting process.Based on the current micro-miniaturization of the product is moving toward the direction of the urgent need to micro-cutting mechanism of the theoretical level of exploration and cutting performance analysis to sort out the role of micro-cutting process,each of the cutting parameters to enhance the micro-cutting Technology to optimize the quality of micro-machining.The subject of the cutting and machining of the old cutting-level comparative analysis of cutting theory,sort out the micro-cutting machining which exists in particular the cutting situation in the metal cutting Finite Element Analysis,The theoretical analysis and correction of the uniqueness of micromachining,the friction model to be used in the simulation of cutting simulation,the standard of the knife-chip separation,the material constitutive model and the cutting geometry model are carried out.A cutting simulation model suitable for the uniqueness of micro-cutting is established.In this model,the geometric model is simplified and transformed into a two-dimensional orthogonal cutting plane strain problem for further solving.The tool is also simplified in this model,simplifying it into a circular edge radius cutter;the material constitutive model uses the corrected Johnson-Cook cutaway model and the Johnson-Cook material model.This project uses the idea of finite element analysis,the use of non-linear simulation of large software ABAQUS,set up a finite element analysis of the micro-cutting model,the micro-cutting micro-cutting force which exists,the minimum cutting thickness,the actual negative The simulation results of angle and size effect are of great significance for exploring the theory of micro-cutting and the optimization of machining technology.Finite element simulation was performed on AISI 4340(ductile material)and single crystal silicon(hard and brittle material)using a single-element analysis method.The data obtained from the FEA simulation show that the micro-machining process is There is a size effect,and also collected not the same as before the chip cutting edge cutting process and cutting speed on the shape of the state of action.Through the simulation analysis,the law of the cutting force influenced by cutting edge radius,cutting speed and cutting rake angle is obtained,which proves that increasing the rake angle helps to reduce the cutting force and improve the micro-machining Quality.