考虑热力耦合作用的钻削钛合金材料有限元仿真研究

Finite Element Simulation Research on Drilling Titanium Alloy Material Based on Thermal Mechanical Coupling

针对钛合金板钻削过程中考虑热力耦合和不考虑热力耦合的情况,分别建立三维钻削模型并进行有限元仿真分析。采用单因素法分析每转进给量和钻削速度对三维钻削模型和扭矩的影响。结果表明,采用大钻削速度和小进给量能减小钛合金钻削时产生的轴向力。考虑热力耦合模型的轴向力和扭矩大于不考虑热力耦合模型的轴向力和扭矩,但在相同钻孔参数下曲线变化趋势基本一致。采用多元线性回归分析拟合了钛合金板钻削过程中考虑热力耦合和不考虑热力耦合的轴向力预测公式。

Three-dimensional drilling models of titanium alloy plate drilling process considering thermal mechanical coupling and without considering thermal-mechanical coupling are established for finite element simulation analysis.The influence of two drilling parameters,feed per revolution and drilling speed,on the axial force and torque of 3D drilling model is analyzed by single factor analysis.The results show that high drilling speed and small feed per revolution can reduce the axial force during titanium alloy drilling.The axial force and torque of the model considering thermal-mechanical coupling are larger than those without considering thermal-mechanical coupling,but the curve change trend is basically the same under the same drilling parameters.By multiple linear regression analysis,the axial force prediction formulas of titanium alloy plate drilling process considering thermal-mechanical coupling and without considering thermal-mechanical coupling are fitted.