Study For SiC_p/Al Composites Milling

SiC_p/Al composite material has many advantages, such as high strength, high modulus,high temperature, good wear resistance and low coefficient of thermal expansion, and have broad applications in aerospace, automotive, optics and other fields. At the same time,because of the existence of high hardness of SiC particles, it can easily cause wear on cutting tool in the milling process. The above problems have become the difficulty of processing such composite materials, thus the research on cutting technology and the optimization of processing parameters have important significance on the promotion of the application and development of such materials in the field of engineering.The topic selects SiC_p/2024 Al as the research target, establishes dimensional milling model based on finite element analysis software ABAQUS, and conducts finite element analog simulation on SiC_p/Al composite materials. This paper first discusses equivalent simplified model of the material, various parameters of the material, the friction type between the chip and tool, the delineation of the grid, and other key technical issues. By means of FEA, simulation results of the milling force components curve are obtained and its results are analyzed. We also have studied the simulation results of residual stresses on the machined surface, which coincides with the experimental results under the same milling conditions as the simulations. With the orthogonal test, this paper analyses what the impaction of the cutting force by spindle speed, feed rate, cutting depth, which is using multiple linear regression analysis processing and milling force fitting formula contrasted with the simulation results using the least squares regression. The results show that: the impact of factors that affect the degree of cutting forces are arranged in descending order of the feed rate, cutting speed, spindle speed; Cutting force increases as the feed rate and cutting speed increases, while, it increases as the spindle speed reduces; Simulation results and experimental results are consistent with the error in the range of 10%. It is feasible for milling simulation by finite element analysis software.