Virtual Simulation Technology For High Speed Cutting

With a very small within the scope of high strain and high strain rate and instantaneoustemperature, metal high-speed cutting process is a typical process of nonlinear thermalcoupling. The simulation of FEM cutting via simulation of computer CAE softwarereproducing the whole process of relative motion of work piece and tool in the Process ofhigh speed cutting, and dynamically displaying the distribution of heat, stress-strain,temperature, and exporting the time or displacement curve of cutting force and temperature,and making it break through the defect of study methods and become a effective way to studymechanism of high-speed cutting.In this paper, firstly, we had studied the key technical problems of FEM simulation andits basic theory in the application of high speed cutting. Secondly, we focused study of theeach characteristics and differences of chip shape, cutting force and temperature distributionin the process of metal homeostasis and non-steady state high-speed cutting and had acomparison and synthesis of constitutive model, chip separation criterion and friction modelproposed by predecessors, and established the respective finite element model of two differentstates of cutting process. Using the general-purpose finite element software(ABAQUS/Explicit)and the special software of metal plastic deformation(Deform 3D),we separately conduct two-dimensional and three-dimensional modeling analysis, inputmaterial model, modify the frictional contact types, local sub-grid, and vividly simulate theformation of ribbon and the jagged chip, and analyze the equivalent stress and principal stressof chip, work piece, cutting tool and distribution of equivalent plastic strain, and calculate thegeneral laws of the three elements of cutting impacting cutting force and cutting temperaturein the process of metal-cutting when using orthogonal analysis. Furthermore, tested byturning , it Reveals, in the process of orthogonal cutting, the forming characteristics of chipwhile under different processing conditions and the general laws between cutting force,cutting temperature and cutting parameters. Compared to the result and simulation results, we verified the accuracy of finite element simulation and feasibility.