基于知识的翻边工艺设计支持系统

摘要

钣金零件是组成飞机机体的主要部分,为了提高钣金工艺设计的质量与效率,实现知识的重用和共享,对翻边工艺设计的智能化、知识获取技术进行了研究.根据翻边成形受力状态的不同,提出了翻边件的特征表示方法,总结了3种翻边组合模式,用于建立相应的设计模块；提出了面向实验和有限元数据的知识获取方法,将隐式知识从数据中提取出来,构建知识库,支持系统的智能设计.根据提出的方法,结合CAE模拟,建立翻边工艺设计支持系统,具体实际事例表明所建立的系统提高了设计的质量和效率.%In order to improve the aircraft sheet metal forming process planning quality and efficiency based on the knowledge reuse, the knowledge based flanging process planning system and process knowledge acquisition technology are developed. Based on the strained condition of the flanging process, the flanging geometrical characteristic represent method is built to establish the design module, including 12 different combined models. And then, the process knowledge acquisition technology is constructed to abstract implicit knowledge form the database, which is achieved from the experiments or the finite element methods. The knowledge is used to construct the knowledge base, in order to support the intelligent process planning. After that, the knowledge based design support system for the complex flanging process planning is developed. An example of flanging part is used to verify the effectiveness and practicability of the system.