Finite Element Modelling and Simulating of Drilling of Titanium Alloy
Finite Element Modelling and Simulating of Drilling of Titanium Alloy
复制标题
钛合金钻削的有限元建模与仿真
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Jie Sun
中科院分区：
文献类型：
--
作者：
Yong Yang;Jie Sun
由于材料在钻削过程中的变形过程十分复杂，利用有限元模拟进行钻削加工的研究较少，报道较少。为了研究钻削过程，建立了钻削过程的热力耦合有限元模型。实现了材料本构模型、材料破坏规律、接触摩擦规律等关键技术，提高了有限元模拟的精度。利用该有限元模型对Ti6Al4V合金的钻削过程进行了预测。将预测的切削力与实测力进行比较，验证了有限元模型的合理性。分析表明，钻进过程中漏失应力和温度的分布都是先增大的，在钻进稳定状态时达到最大值，然后逐渐减小，直至钻穿完孔为止。这些结果证实了有限元模拟在预测钻削过程、选择最佳刀具和切削参数方面的能力。
Due to the material deformation process in drilling are quite complicated, research using finite element simulation on drilling is limited and not widely reported. To investigate drilling process, a coupled thermo-mechanical finite element model of drilling is developed. Several key technologies, such as material constitutive model, material failure law, contact and friction law, have been implemented to improve the accuracy of finite element simulation. Using this finite element model, drilling process of Ti6Al4V alloy is predicted. Comparing the predicted cutting forces with the measured forces shows the finite element model is reasonable. Analyses show that the distributions of Misses stress and temperature during drilling process all increase at first, and get maximal value when drilling is in steady state, then decrease gradually till the hole is drilled through. These results confirm the capability of finite element simulation in predicting drilling process and selecting optimal tool and cutting parameters.