【作者】 刘峰；

【导师】 杨建国；

【作者基本信息】 东华大学 ， 机械制造及其自动化， 2013， 硕士

【摘要】 天线罩不仅是无线电寻的制导系统的重要组成部分,而且是导弹弹体的重要部件,其加工质量直接影响导弹的制导准确率。天线罩一般由硬脆石英陶瓷材料制成,结构为复杂曲面薄壁回转体,制造工艺复杂,随着导弹性能要求的不断提高,对天线罩的加工精度也提出了越来越高的要求。然而,目前国内现有的天线罩加工装备技术落后,极大的限制了天线罩制造水平的提高。为了进一步提高天线罩的加工效率和加工质量,本文以主动式自寻的导弹的石英陶瓷复杂曲面天线罩为研究对象,在现有天线罩加工设备的基础上,进行天线罩工艺及其装备的优化与应用研究。论文的主要工作如下：(1)根据高性能天线罩的技术要求,深入分析了天线罩现有加工设备的一些关键技术,总结了天线罩加工误差产生的原因,并针对现有设备提出了一些有待于改进的关键问题,为进一步进行有效的设备改进提供了依据。(2)针对天线罩内型面磨削过程中安装支架悬臂刚性差的问题,提出了双V型块支撑圆筒夹具的方式实现天线罩内型面磨削夹具与机床的联接方案,并完成了V,型架的设计与制造；针对安装支架过重的问题,应用ANSYS Workbench中的DesignXplorer模块对支架结构进行拓扑优化,并对优化前后支架的静态性能进行了分析比较，减轻了支架重量，提高了支架的刚度。(3)对天线罩专用磨床进行了改造，在MGKS1332/H高精密高速外圆磨床的外圆磨砂轮架上,设计安装了天线罩专用磨具，同时在磨床头架上安装了带有莫氏5#锥柄的过渡盘。运用有限元软件ANSYS进行了砂轮架改造前后的模态分析,分析了机床改造对机床原有动态性能的影响,并运用机床内置动平衡仪进行了改造后机床的动态性能检测,检测结果表明,改造后的机床动态性能满足要求。(4)进行了改进后天线罩安装系统的性能测试,同时进行了天线罩磨削砂轮主轴系统精度的检验,检验结果表明,改进后天线罩安装系统的精度显著提高,天线罩磨削砂轮主轴系统精度满足设计要求。(5)进行了天线罩内外型面磨削加工实验,实验结果表明,改造后的专用磨床满足天线罩磨削加工要求,提高了天线罩的加工精度,为我国国防工业发展做出了贡献。更多还原

【Abstract】 The radome is not only one of the key parts of radio homing guidance missile, but also an important component of the missile body. Its processing quality directly affects missile guidance accuracy. Radome is made of hard brittle quartz ceramic materials, has a thin revolving body of complicated surface, and has complicated manufacturing process. With the continuous improvement of the missile performance requirements, more and more highly accuracy requirements is put forward in the process of radome machining. However, the current domestic radome processing equipment has low efficiency, which greatly limits the accuracy improvement of radome machining. In order to further improve the radome machining quality and efficiency, this paper studied quartz ceramic radome with complicated surface based on the existing processing equipment.(1) According to the technical requirements of high performance radome, the key technologies of the radome existing processing equipment are deeply analysis. The reasons of radome processing error are concluded. Then this paper puts forward some key problem which needs to be improved based on existing processing equipment, and it provides valuable basis for further effective improvement of equipment.(2) According to low rigidity of installation bracket in radome internal surface grinding process, this paper puts forward the double V shaped frame support cylinder jig way to realize the connection of fixture and machine tool, and designs the V shaped frame. According to overweight of cylinder support, we proceed topology optimization design for support, Using ANSYS Workbench, and reduce the support weight, improve the support stiffness.(3) The modification of MGKS1332/H grinding machine tool is made, design the suspension internal circular grinding device, and install the flange plate with 5# Morse taper. By using the fiite element analysis software ANSYS, make the grinding wheel frame transformation of modal analysis, test results show that the machine dynamic performance meet the requirements after modification.(4) The performance test of radome installation system and spindle system is done. The result shows that the precision of installation system increased significantly, and the performance of spindle system meet the requirements。(5) The experiment is made to verify the measurement, and its result shows that the installation system and machine tool after modification meet the radome grinding requirements. The radome machining precision is improved, and make contributed to the development of China’s defense industry.更多还原