数字化协同测量在飞机弱刚性零件加工中的应用

Digital Collaborative Measurement Used to Processing Weak Rigid Parts on Aircraft

针对飞机弱刚性蒙皮零件的高精度加工要求,通过机器人铣削系统协同标定、蒙皮边界提取与逆向建模、末端执行器定位修正等技术研究,实现飞机蒙皮、口盖、壁板类结构件边部余量检测及加工在线修正,边界测量精度0.1mm,末端执行器定位误差不大于0.2mm。经验证,本研究满足了四代机制造对数字化测量的要求,显著提高了飞机蒙皮壁板自动化铣削和数字化水平,促进了飞机制造从传统的手工装配向智能化装配模式的跨越。

Aiming at the high precision machining for weak rigid parts of aircraft, the digital measure technologies including collaborative calibration for robot milling system, edge extracting and reverse modeling of skins, and positioning correction of end-effector were developed. Based on the above measure of edge machining allowance and on-line correction of machining process, the measurement error of skin edge was 0.1mm and end-effector positioning error was no more than 0.2mm for skin, cover and panel of aircraft. The digital collaborative measure in this paper meets the requirements of digital measurement for advanced aircraft manufacture, improves level of automatization and digitization for skin and panel milling of aircraft, and accelerates the progress from handwork assembly to intelligent assembly.