外文翻译-固定套筒零件机械加工工艺规程与机床夹具设计.doc

本科毕业设计 论文 外文翻译（附外文原文） 系 院 ： 机械与控制工程学院 课题名称：固定套筒零件机械加工工艺规程与 机床夹具设计 专业 方向 ： 机械设计制造及其自动化 （机械装备设计与制造） 班 级： 机械11-2 学 生： 覃志斌 指导教师： 李明涛 日 期： 2015年3月12 日 Application and development Of case based reasoning in fixture design Abstract: Based on the case based designing CBD methodology, the fixture similarity is in two respects: the function and the structure information. Then, the computer aided fixture design system is created on case based reasoning CBR ,in which the attributes of the main features of work piece and structure of fixture as case index code are designed for the retrieve of the similar cases, and the structure and hierarchical relation of case library are set up for store. Meanwhile, the algorithm based on the knowledge guided in the retrieve of the similar cases, the strategy of case adapt at ion and case storage in which the case indent if cat ion number is used to distinguish from similar cases are presented. The application of the system in some projects improves the design efficiency and gets a good result . Keywords: case based reasoning ;fixture design; computer aided design CAD Fixtures are devices that serve as the purpose of holding the work piece securely and accurately, and maintaining a consistent relationship with respect to the tools while machining. Because the fixture structure depends on the feature of the product and the status of the process planning in the enterprise, its design is the bottleneck during manufacturing, which restrains to improve the efficiency and lead-time. And fixture design is a complicated process, based on experience that needs comprehensive qualitative knowledge about a number of design issues including work piece configuration, manufacturing processes involved, and machining environment. This is also a very time consuming work when using traditional CAD tools such as Epigraphic, CATIA or Pro/E , which are good at performing detailed design tasks, but provide few benefits for taking advantage of the pre