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通过对飞机结构件数控加工工艺进行分析,说明了角度头在飞机结构件难加工结构中的优势,给出了数控加工中角度头位姿的选取方法和角度头加工刀轨生成方法。依据加工机床的结构形式和运动变换特征,给出角度头后置处理坐标转换的计算方法,并基于RTCP给出角度头后置处理非线性误差的补偿方法。以复杂舱盖工件为例对角度头数控加工技术进行验证,结果表明,角度头加工技术不仅提高了工件的加工质量和加工效率,降低了难加工结构的成本,也拓展了数控机床的加工范围。
Through the analysis of the numerical control machining process of aircraft structural parts, the advantage of the angle head in the difficult-to-process structure of the aircraft structural parts is illustrated. The method of choosing the attitude and attitude of the angle head in the NC machining and the generation of tool path in the angle machining are given. According to the structure of machine tools and the characteristics of motion transformation, the calculation method of coordinate conversion of angle head post-processing is given. And the compensation method of post-processing non-linearity error of angle head is given based on RTCP. The case of complex hatch cover is taken as an example to verify the NC machining technology of angle head. The results show that the angle head machining technology not only improves the machining quality and processing efficiency of the workpieces, but also reduces the cost of difficult structure and expands the machining range of CNC machine tools .