70 m天线俯仰扇齿组合的加工与安装

俯仰扇齿组合是70 m天线结构系统的关键部件，其加工与安装的精度直接决定天线俯仰运动的精度，最终影响天线的指向精度。文中从俯仰扇齿组合施工现场保精度安装需求出发，介绍了俯仰扇齿组合前期生产加工、检测及预组装的详细工艺策划方案。通过设计合理的工艺检测基准、安装基准、工艺模板及工艺复位工装，解决了俯仰扇齿组合安装、检测及定位问题，最终安装精度达到了70 m天线俯仰扇齿组合的设计精度要求，为70 m天线结构系统现场顺利安装奠定了坚实的基础。

Manufacturing and Installation of Elevation Gear Combination of 70 m Antenna

The elevation gear combination is the key component of the 70 m antenna structure system. Its manufacturing and installation accuracy directly determines the accuracy of the antenna pitch motion and finally affects the pointing accuracy of the antenna. The detailed process planning scheme for the early production, processing, inspection and preassembly of the elevation gear combination is introduced in this paper according to the installation requirements on the construction site of the elevation gear combination. By designing reasonable process inspection benchmark, installation benchmark, process template and process reset tooling, the problems of installation, detection and positioning of elevation gear combination are solved. The final installation accuracy meets the design accuracy requirements of elevation gear combination of 70 m antenna, which lays a solid foundation for the smooth installation of 70 m antenna structure system on site.