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Ka频段通信卫星天线反射器产品通常是由内面板、蜂窝芯子和外面板胶粘剂固化成型的碳纤维蜂窝夹层结构,内面板形成的反射面为满足一定精度要求的二次曲面。由于反射器本身特征无法作为准确基准进行找正,且在工装上的安装位姿不确定性,因此反射器在固化成型后的数控加工过程中无法直接获取定位基准。针对反射面的三坐标测量机检测数据,采用基于曲面最佳拟合数据调整理论模型位姿的方法,解决了碳纤维蜂窝夹层结构二次曲面产品加工基准的精确获取难题,并在数控程序编制中提出“虚拟理论曲面位姿”方法,对已有的数控程序操作进行重用,大幅提高了反射器产品批量研制的数控编程效率。
Ka-band communications satellite antenna reflector products are usually cured by the inner panel, honeycomb core and outer panel adhesive carbon honeycomb sandwich structure, the inner panel to form a reflective surface to meet a certain accuracy requirements of the quadric surface. Because the reflector itself can not be used as an accurate reference to find the correct position, and the mounting pose uncertainty in the tooling, the reflector can not directly acquire the positioning reference during the CNC machining after solidification. According to the CMM inspection data of the reflective surface, the method of adjusting the pose of the theoretical model based on the best fitting data of the surface is adopted to solve the problem of accurately obtaining the machining reference of the secondary surface of the carbon fiber honeycomb sandwich structure. In the process of NC programming Put forward the method of “virtual theoretical surface pose”, reused the existing NC program operation, and greatly improved the numerical programming efficiency of the batch product of reflector products.