无人飞行器输出轴系组件分层切割加工优化

Optimization of Layered CuttingProcess for Output Shaft Assemblyof Unmanned Aerial Vehicle

以某航空无人飞行器的输出轴系组件为研究对象,研究在交变温度下机械分层切割加工优化方法,在输出轴系机械组件多轴分层切割过程中,随着多轴分层切割点散热系数的变化出现疲劳损伤,通过对疲劳损伤的预测和补偿,防止过切割和摩擦热对组件的损坏。提出一种基于两轴联动切割热误差补偿控制的交变温度下机械多轴分层切割优化方法。对交变温度下飞行器输出轴系多轴分层切割点进行应力分析和有限元建模,构建切割加工的评价参量体系,输出轴系组件多轴分层切割点最优路径分为前向轴控制和后向轴控制分层切割路径,采用前向轴和后向轴两轴联动切割控制方法,设计两轴联动切割热误差补偿控制的切割方法,实现加工优化。仿真试验结果表明,采用该方法能有效实现对交变温度下的两轴联动切割热误差补偿控制,改善多轴分层切割工艺,避免了过切割和摩擦热对组件的损坏。

A certain type of unmanned aerial vehicle output shaft assemblies is taken as the object of research, under alternating temperature, stratified mechanical cutting optimization method is studied, in the output shaft mechanical components for a multi axis layered cutting process, with the multi axis layered cut point heat transfer coefficient changes occur fatigue damage by prediction and compensation of the fatigue damage, prevent over cutting and friction heat damage to components. A mechanical axis cutting control thermal error compensation of alternating temperature under multi axial cutting based on hierachical optimization method. Alternating temperatures vehicle output shaft axis layered cut point of force analysis and finite element modeling to construct cutting processing parameter of assessment system, output shaft assembly for a multi axis layered cuttingpoint optimal path for the former to the control shaft and shaft to hierachical control cutting path, mining, the shaft and the rear shaft axis to cutting control method, two axis cutting method of thermal error compensation control is designed, and the processing optimization is realized. Simulation results show that using this method can effectively realize the alternating temperatures of two axes linkage cutting thermal error compensation control,it improves the multi axis layered cutting process, avoids the over cutting and friction heat on component damage.