基于纳米流体冷却的钛合金车削温度场分析

车削钛合金时加工区温度高，会降低工件表面质量、加剧金刚石车刀磨损。可使用雾化纳米流体喷射等冷却方式改善车削环境，提高钛合金表面的加工质量和金刚石刀具的耐用度。基于ABAQUS仿真软件建立Ti-6Al-4V钛合金材料模型，研究不同冷却方式下切屑和刀具的温度变化规律，并进行钛合金车削试验对仿真结果进行验证。结果表明:车削钛合金时使用雾化纳米流体喷射方式降温效果良好，切屑和刀具表面最高温度分别为168 ℃和142 ℃，相比于普通冷却方式的温度下降了约70%。在稳定切削状态下的切屑和刀具温度仿真和试验结果误差在5%以内，仿真结果合理。 

Analysis of turning temperature field of titanium alloy based on nanofluid cooling

When turning titanium alloys, the high temperature in the processing zone reduces the surface quality and intensifies the wear of diamond turning tools. Cooling methods such as atomized nano-fluid injection are used to improve the turning environment, improve the processing quality of titanium alloy surface and the durability of diamond cutting tools. A Ti-6Al-4V titanium alloy material model was established based on ABAQUS simulation software. The temperature variation of chips and tools under different cooling modes was studied, and the simulation results were verified by turning experiments of titanium alloy. The results show that the cooling effect of atomized nano-fluid injection is good when turning titanium alloy. The maximum surface temperatures of chips and tools are 168 ℃ and 142 ℃, respectively, which is about 68% lower than that of common cooling mode. The simulation and experimental results of chips and tools under stable cutting state have errors within 5%, which verifies the rationality of the simulation results.