基于知识的飞机钣金制造数据集研究与开发

发布时间：2018-09-14 10:45

【摘要】：飞机钣金设计模型传递到制造部门前,技术人员需要根据制造部门需求在零件设计模型的基础上添加制造工艺信息,这些数据信息的添加主要依靠技术人员的知识经验,过程繁琐、准确性差,直接影响零部件研制周期。飞机钣金零件种类繁多、制造工艺复杂,其产品数字化制造过程中涉及较多的经验知识,如何重用已有的知识快速创建三维制造模型并完善附属工艺信息成为制约钣金生产准备效率的关键问题。论文以飞机钣金制造数据集为研究对象,研究数据集构成及快速创建方法,在CATIA平台上完成数据集应用系统开发。论文的主要研究内容如下:(1)分析飞机钣金数字化制造过程对制造数据集的需求,从数据内容、组织方式等方面对比设计数据与制造数据,依据制造数据集的组成及数据结构提出数据集构建要求,形成一套制造数据集设计规范。(2)归纳总结技术人员知识经验,将获取的钣金零件设计及制造知识以数字量形式存储、表示,通过基于规则的推理及基于模型的推理应用到实际问题求解中,构建完成钣金制造特征模型库、标准件库和文本数据库。(3)基于钣金制造知识库,对数据集中几何信息和非几何信息两个部分内容创建方法进行研究,采用数字化制造的快速设计思想,完成制造数据集各要素信息创建的关键算法,为数据集应用系统提供技术基础。(4)采用CAA技术对CATIA进行二次开发,开发完成“制造数据集应用系统”,搭建系统框架,详细设计功能界面及应用流程,几何信息模块和非几何信息模块实现了钣金制造结构特征及基本工艺信息的添加,满足企业快速创建制造数据的需求。
[Abstract]:Before the aircraft sheet metal design model is transferred to the manufacturing department, the technicians need to add the manufacturing process information on the basis of the part design model according to the requirements of the manufacturing department. The addition of these data information mainly depends on the knowledge and experience of the technicians. The process is tedious and the accuracy is poor, which directly affects the development cycle of parts. There are many kinds of aircraft sheet metal parts, the manufacturing process is complex, and the digital manufacturing process of aircraft products involves a lot of experience and knowledge. How to reuse existing knowledge to quickly create 3D manufacturing model and improve the ancillary process information are the key issues that restrict the efficiency of sheet metal production preparation. This paper takes the aircraft sheet metal manufacturing data set as the research object, studies the data set constitution and the fast creation method, completes the data set application system development on the CATIA platform. The main research contents of this paper are as follows: (1) analyze the requirement of manufacturing data set in aircraft sheet metal digital manufacturing process, compare design data with manufacturing data from data content, organization mode and so on. According to the composition and data structure of manufacturing data set, the data set construction requirements are put forward, and a set of manufacturing data set design specification is formed. (2) summarize the knowledge experience of technicians, and store the acquired sheet metal parts design and manufacturing knowledge in the form of digital quantity. By applying rule-based reasoning and model-based reasoning to practical problem solving, the characteristic model base, standard part database and text database of sheet metal manufacturing are constructed. (3) based on sheet metal manufacturing knowledge base. The methods of creating geometric information and non-geometric information in data set are studied. The key algorithm of creating every element information of manufacturing data set is completed by using the fast design idea of digital manufacturing. To provide the technical foundation for the data set application system. (4) using CAA technology to carry on the secondary development to the CATIA, develop and complete the "manufacturing data set application system", set up the system frame, design the function interface and the application flow in detail, The geometric information module and the non-geometric information module can add the structural features and basic process information of sheet metal manufacturing to meet the needs of rapid manufacturing data creation.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V262

【参考文献】