表面织构对GCr15淬硬轴承钢切削过程影响分析

针对GCr15淬硬轴承钢切削过程中由于切削力大、切削温度高而导致的刀具磨损加剧问题,在工件表面预置织构,通过有限元仿真结合正交试验对切削过程进行模拟,并通过信噪比分析方法进行优化分析,利用极差分析、方差分析确定最优切削参数组合以及切削参数对于切削力以及温度的影响程度。切削仿真结果表明:切削速度120 m/min、进给量0.05 mm/r、切削深度0.1 mm为最优切削参数组合。在最优切削参数条件下,通过对表面织构GCr15轴承钢进行切削仿真模拟,得到切削力以及切削温度的仿真结果。将表面织构和无表面织构的切削仿真模拟结果进行对比,结果表明表面织构切削仿真的切削力及切削温度都得到有效降低,有利于减少刀具磨损,提高刀具寿命。

Analysis of the Influence of Surface Texture on the Cutting Process of GCr15 Hardened Bearing Steel

In order to solve the problem of tool wear aggravation caused by large cutting force and high cutting temperature during the cutting process of GCr15 hardened bearing steel, the texture was preset on the surface of the workpiece. The finite element simulation and orthogonal test were combined to simulate the cutting process, and the optimization analysis was carried out by using the signal to noise ratio analysis method. Range analysis and variance analysis were used to determine the optimal cutting parameter combination and the influence of cutting parameters on cutting force and temperature. The cutting simulation results show that cutting speed of 120 m/min, feed rateof 0.05 mm/r and cutting depth of 0.1 mm are the optimal cutting parameters combination. The cutting simulation of GCr15 bearing steel with surface texture was carried out under the condition of optimal cutting parameters, and the simulation results of cutting force and cutting temperature were obtained. The cutting simulation results of workpiece with and without surface texture were compared. The results show that the cutting force and cutting temperature of the workpiece with surface texture are reduced effectively, and the surface texture is beneficial to reduce tool wear and improve tool life.