箱体类零件CAD\CAPP\CAM在NC机床上的研究与应用

【作者】 李宗刚；

【导师】 胡赤兵； 邬再新；

【作者基本信息】 兰州理工大学 ， 机械制造及其自动化， 2004， 硕士

【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，以箱体类零件为研究对象，研究在VC++环境下，如何实现产品的数字化表示，以及如何从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。同时，文章还提出了将应用程序与CNC系统集成的方案，并设计了在CNC环境下的操作界面，使得在加工现场同时实现零件的设计与加工。 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)采用成组技术划分零件特征。在本课题中，通过特征设计建立特征类，与Pro／E系统的数据库连接在一起，从而实现数据共享，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的一致性、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，从而为开发应用模块以扩展现有软件的功能，实现CAD／CAPP／CAM集成提供了良好的基础。更多还原

【Abstract】 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 trunk 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. In the meantime, the thesis has also put forward the integrated plan between the CNC systems and the Application and designed the interface under the CNC system. So the worker can design and manufacture the part in the spot.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 O-O (Object-Oriented). The processing knowledge of features has been established by it. The third is to measure off the trunk parts feature with the GT . The thesis depend on it to build the feature classes, which makes the share of data between the Pro/E database and the Application, improves 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 trunk 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.更多还原