Numerical simulation on cutting hardened steelCr12MoV with sandwich structure
                                          CHENG Jinqiang, WANG Yangyu, WANG Huiqiang, NI Pengcheng
                    (Key Laboratory of E＆M, Ministry of Education, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the problem that it is difficult to predict the complexity and cutting force of sandwich structure hardening steel，a numerical analysis model of Cr12MoV sandwich structure hardening steel was established by using ABAQUS，this model was based on physical failure chip separation criteria and JohnsonCook constitution model. The cutting processes of sandwich structure hardening steel were numerically simulated by the numerical analysis model, acquiring the distributions of cutting forces and temperatureby changing the parameters of the simulation in the process of machining. The effects of hardness on cutting temperature and cutting force were analyzed. The simulation results was verified by milling experiment.The results indicate that the cutting temperature become higher when the hardness of part become harder and the temperature with sandwich structure is higher than the temperature of part with corresponding hardness in the same cutting condition. The cutting force of the weld interlayer position is only influenced. The experimental results agree with the simulation results, so as to the validity of the simulation model verified.

Key words: sandwich structure; hardened steel; cutting force; cutting temperature