Hard Turning Numerical Simulation And Experimental Study

Ultra-hard material has been widely used in many industries, however, due to cutting power and high cutting temperature and rapid tool wear in the processing, all of these leaded to the high cost and low efficiency. The hardened steel as a typical Ultra-hard material, its processing mode commonly used grinding; it has low processing efficiency and large environmental impact. Hard turning has some features, such as good malleability, high precision, low coast and green, hard turning is used to instead of the grinding hardened steel. But as a emerging metal cutting process, its working mechanism of the present study is not deep enough, these resulted in many problems in the hard turning process, the process needs to be studied by a large number of experiments. With the rapid development of numerical simulation techniques, finite element method in metal-cutting areas to be more widely used, we can use the finite element method to replace part of the experiment on the hard turning process research.This paper based on the theory of metal cutting, combing with finite element simulation technology, using the metal-cutting processional simulation software AdvantEdge FEM to build a three-dimensional model of hard turning, researching the cutting force and cutting temperature in the process of turning hardened steel H13, discussing the variation of cutting force and cutting temperature in the hard turning process. During the test the design method using the orthogonal regression, using the cutting speed, cutting depth, feed rate as the experimental factors, choosing the cutting force and temperature as the test indicator, getting the empirical formula about the cutting force and temperature in the hard turning. In order to verify the reliability of the test program, through the appropriate test methods to test the regression equation, the test results show that using the orthogonal regression to design the regression equation had a high degree of confidence. Meanwhile using the single factor analysis, analyzed the tendency of the cutting force and cutting temperature changes with the cutting speed, cutting depth and feed rate in the cutting process, deepened the study of hard turning mechanism.In order to verify the accuracy of AdvantEdge FEM numerical simulation of three-dimensional model, using carbide coated tools for turning HI3hardened steel on digital controlled lathe. To compare the experimental data and simulation data, the comparative results have a better consistency.Through experiment show the finite element method simulation value with higher reliability, the finite element method can be used to replace the part of experimental study in hard turning. Finite element method not only can obtain higher accuracy, lower costs and improve the efficiency of research, but also can get the mechanical characteristics and physical characteristics which is difficult to obtain through experiments, thus contributing to the development of hard turning technology.