Research On Prediction For Milling Force On Numerical Analysis

It is great significance of cutting force for research of cutting mechanism, computing power consumption, design of machine tools, cutting tools, fixture, optimization of tool geometry parameters. Therefore, establish the model of cutting force, state the cutting law of the size and influence, achieve the prediction of cutting on computer numerical analysis technology. It is one of the important issues on theoretical study of the cutting.Based on metal cutting theories, the finite element models of metal machining are first discussed. And the important technology of cutting modeling is summarized, including chip separation criteria, material fracture criteria, the contact friction model, the generation of heat and distributions of the temperature. Then an orthogonal cutting model is established, and the processes of metal cutting were modeled effectively under different cutting speeds using the sliding-sticking friction model. The analysis of the effect of cutting speed on the machining processes is given. Three finite element models including 7075 aluminum, 1045 steel and 52100 steel three-dimensional cutting model are established on the established material constitutive model. The law of cutting force in milling process are studied using these models, and the cutting force curves are established analyzed. Prediction of the chip morphology, cutting temperature, effective stress and strain distribution.Compared with experience of the traditional method, the finite element simulation of metal milling changes on the traditional way of qualitative analysis. The experience of the traditional method of cutting the need for a large number of experimental data, and in some exceptional circumstances, it is difficult to achieve the experience of law, which will undoubtedly increase the cost of production.The finite element simulation of metal milling process is very important for the production practice to select the optimal cutting conditions to improve machining efficiency and reduce cost of production. Finally, the study conclusion in this dissertation result from FEM is validated by comparing the value theory of experience through the milling process. The idea of this thesis research, methods are feasible, the results are also reliable.