【摘要】 为了解决新型转子材料难加工的问题,研究涂层对刀具切削性能的影响,并确定涂层刀具在切削过程中的最佳工艺参数。利用Deform-3D有限元软件进行26NiCrMoV145材料切削过程的数值分析,并在相同切削条件下,研究了未涂层刀具与经过不同镀层厚度处理的TiN-TiCN交替复合涂层刀具在切削过程中切削力与切削温度的变化情况。结合正交试验,以刀具磨损量为优化目标,获得最优工艺参数。结果表明:经涂层处理的刀具切削效果更佳,具有较低的摩擦系数,其中4μm涂层刀具在减小切削力方面更为明显;经涂层处理的刀具在切削温度方面同样表现更优,在切削前期,4μm涂层刀具的切削温度低于8μm涂层刀具的温度;切削后期,4μm涂层刀具的温度高于8μm涂层刀具;涂层刀具的切削最优参数组合为切削速度300m/min,进给量0.2mm/r,切削深度0.45mm。更多还原

【Abstract】 In order to solve the difficult machining problem of the new rotor material, the coating technology is used to study the influence of coating on the cutting performance of the cutting tool, and the optimal process parameters of the coated tool in the cutting process are determined.The cutting process of 26 NiCrMoV145 material is numerically analyzed by finite element software Deform-3 D.Under the same cutting conditions, the changes of cutting force and cutting temperature of uncoated tool and TiN-TiCN coated tool with different coating thickness are studied in the cutting process.Combining the orthogonal experiment, the optimal process parameters are obtained with the tool wear as the optimization objective.The results show that the cutting effect of the coated tools is better, and the friction coefficient is lower, especially for the 4μm coated tools.The cutting temperature of the coated tools is better, and the temperature of the 4μm coated tools is lower than that of the 8μm coated tools in the early cutting stage, and the temperature of the 4μm coated tools is higher in the later stage.The results show that the optimal cutting parameters are as follow, cutting speed is 300 m/min, feed rate is 0.2 mm/r and cutting depth is 0.45 mm.更多还原