Al2O3/TiC陶瓷材料铣削加工的离散元模拟和试验分析
2018-07-13
作者：杜浩，谷美林，谷婷婷，赵百强
单位：河北工业大学
摘要：针对Al2O3/TiC陶瓷材料铣削过程，采用离散元模拟软件PFC3D建立离散元模型，模拟裂纹的扩展情况，得到不同进给速度、铣削深度、铣刀球头直径下的铣削力图线以及裂纹数，并优化加工参数。通过铣削试验验证离散元模拟结果的正确性。基于模拟结果与试验结果相一致，得到不同铣削参数与铣削力、陶瓷材料裂纹数之间的变化规律：随进给速度增大，铣削力随之增大，裂纹数先减小后增大；随切削深度增大，铣削力与裂纹数增大；铣刀球头直径增大，铣削力变化不大，裂纹数随球头直径的增大而增大。
关键词：Al2O3/TiC陶瓷材料；微铣削；离散元仿真；裂纹；铣削力
中图分类号：TG115；TG61；TH161.3文献标志码：A
Discrete Element Simulation and Experimental Analysis for Milling
Process of Al2O3/TiC Ceramic Material
Du Hao，Gu Meilin，Gu Tingting，Zhao Baiqiang
Abstract:Aiming at the milling process of Al2O3/TiC ceramic materials，the discrete element model is established by discrete element simulation software PFC3D，and the propagation speed of the crack is simulated.The milling force line and the number of cracks are obtained under different feed rate，milling depth，milling head diameter，and optimized machining parameters are obtained.And the correctness of the discrete element simulation results is verified by the milling test.Based on the simulation results and the experimental results，the change rules of milling parameters and milling force and the number of cracks in ceramic materials are obtained.With the increase of feed rate，the milling force increases and the number of cracks decreases and then increases.With the increase of cutting depth，the milling force and the number of cracks increase.With the increase of the nominal ball diameter，the milling force does not change greatly，and the number of cracks increases with the nominal ball diameter.
Keywords:Al2O3/TiC ceramic material；micromilling；discrete element simulation；crack；cutting force