基于Pro/E的CAD/CAPP/CAM集成系统的开发与研究
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摘要
CIMS是80年代以来国际上制造自动化领域的前沿研究课题,其关键是
    CAD/CAPP/CAM集成技术,这种集成不是简单的组合或叠加,而是各模块间信
    息的提取、交换、共享和处理的集成。随着FMS和CIMS的发展,人们逐渐认
    识到CAPP是实现CAD/CAPP/CAM真正集成的关键,是连接CAD和CAM之
    间的桥梁和纽带。因此,如何实现CAPP与CAD、CAM的有效集成,已经成为
    CAD/CAPP/CAM集成技术发展过程中不可忽视的关键问题之一。
    课题选取Pro/E为开发平台,以回转体零件为研究对象,研究在VC++环境
    下,如何从CAD系统中提取CAPP系统需要的零件信息,同时为后续环节CAM
    提供必要的数据和进行系统集成的接口。
    在课题开发过程中使用的方法有: (1) 基于特征的零件信息描述方法。采
    用这种描述方法解决了现有CAD/CAPP/CAM集成存在的三个问题:集成度不
    高、数据不全和描述层次低;(2) 面向对象的方法。以此方法建立特征的工艺知
    识库;(3) 采用关系型数据库建立工艺信息数据库。在本课题中,通过特征设计
    建立关系型数据库,实现数据共享,这样可提高数据传输效率和系统的集成化程
    度,保证各系统之间数据一致性、可靠性。
    本系统实现了CAD/CAPP/CAM三个子系统之间的信息传递和信息共享,从
    而为CIMS发展提供了良好的基础。
CIMS has been the advanced research problem in manufacture automation in the world since 1980's, in which the key problem is the integration of CAD/CAPP/CAM, the integration is not a simple combination or plus but the integration of extracting, exchange, share and of information among every modules. With the development of FMS and CIMS, people gradually realize that CAPP is the key for the integration of CAD/CAPP/CAM, which is the bridge between CAD and CAM. Therefore, how to carry out the effective integration of CAD/CAPP/CAM has become one of the crucial problems in the development of CAD/CAPP/CAM.
    The thesis chooses Pro/E as the developing platform and researches into the rational parts under the environment of VC ++. How to draw the information of part that CAPP system needs from CAD system? Besides, the system provides necessary data and an interface of the systemic integration for the next step-the CAM system.
    Some methods have been used in the study of the thesis. The first is to describe the parts' information in terms of feature. It has solved three problems: the low degree of the integration, the scarcity the data, and the low lever of describing information. The second is the method of 0-0 (Object-Oriented). The processing knowledge of features has been established by it. The third is to build the rational database. It can improve the efficiency of transmitting data and the level of integration degree, so as to ensure the consistency and reliability of data transmitting among systems. The thesis has achieved the share of data, by building relational database with features.
    This system has realized the transmission and share of information among CAD, CAPP and CAM systems. And it has provided good background for the development of CIMS.
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