Research On Physical Simulation In Cutting Process And Technical Parameters Optimization

In recent years, with the development of computer technology, virtual manufacturing technology has emerged.The virtual manufacturing technology has been widely used in manufacturing industry. Physical simulation in cutting process belongs to the virtual manufacturing technology category and has an important significance in the development of manufacturing technology. However, due to the restrictions on the standard of technology, physical simulation technology is limited to the cutting simulation of simple parts and common material at present. It is still a difficulty problem for the physical simulation in cutting process of difficult to cut materials.This paper closely combines rapid development needs of advanced manufacturing technology, using the finite element numerical simulation technology to simulate the cutting process. This paper uses method of combining the theoretical modeling, software analysis and experimental research. The main research contents of text as follows:(1) First, summarize cutting processing and difficult to cut materials, understanding the applications of virtual simulation technology used in cutting processing. Discusses the background of research and the research status of domestic and foreign, analysing the current problems which exist in research and development trend of finite element simulation.This explains the purpose and meaning of subject research.(2) According to the finite element software DEFORM, analysis and research the formation of the chip, cutting force and heat cutting in metal cutting process. And briefly expound the characteristics of difficult to cut materials and cutting tools selection.(3) Based on the key technology of finite element simulation, a three-dimension finite element model of the cutting process will be established and realize cutting process simulation of difficult to cut materials of superalloys. The formation of the chip in cutting process and variation of the chip will be gained, also the distribution of the stress, strain, cutting force and cutting temperature of the workpiece willed be concluded. Through simulated in different workpiece materials, the cutting performance of difficult materials will be analysed. (4) Through the finite element software, different cutting parameters and tool parameters will be simulated, and the influence curves of cutting force and cutting temperature will be getted. With cutting force, cutting temperature and tool stress as the judging criterion, realize the technical parameters optimization in cutting process. And with the simulation in different tool materials to cut high temperature alloy, realize the reasonable selection of the tools.(5) According to the characteristics of the milling, a three-dimensional finite element model of milling will be established to simulate and the size of milling force will be gained. Then through the milling experiments, the size of the milling force will be measured and compared with simulation value to verify the feasibility and rationality of the finite element simulation.