飞机钛合金结构件侧壁精铣动力学仿真与试验

Dynamic Simulation and Experiment of Finishing Side Wall of Aircraft Titanium Alloys Structural Parts

为了实现飞机结构件数控铣削精加工工艺规范化,获得稳定高效的钛合金精铣切削参数,梳理了飞机钛合金结构件侧壁特征尺寸范围,设计了7种不同精铣余量的切削力仿真与试验方案,分析了顺铣和逆铣情况下切削力随切削余量的变化规律,并进行了试验验证和表面粗糙度测量,其切削力仿真误差仅为0.78%,加工后的表面粗糙度Ra均小于0.4μm,Rz均小于2.9μm,满足飞机零件表面精度要求。试验与测量结果验证了切削力仿真结果的正确性以及工艺参数的可实用性。

In order to standardize theNC finishing milling process of aircraft structural parts,obtain the stable and efficient finishing parameters of titanium alloy,the range of side wall features of titanium alloy structural parts was sorted out,and the cutting force simulation and experimental schemes of 7 different finishing allowances were designed.The variation law of cutting force with the allowances in the down milling and up milling was analyzed,and the test verification and surface roughness measurement were carried out. The cutting force simulation error was only 0.78%,the surface roughness Ra after processing was less than 0.4μm,and the Rz was less than 2.9μm,the surface accuracy requirements of aircraft parts was met.The test and measurement results verified the correctness of the cutting force simulation results and the practicability of the process parameters.