一个通用零件模型的设计和实现

A CAD GENERAL PART MODEL AND ITS IMPLEMENTS

本文介绍了一个CAD通用零件模型的设计原理,并讨论了该模型在参数化CAD环境中的实现技术。该模型通过引入面向对象的思想,不仅适用于机械设计诸领域的国标、部标标准件,而且由于采用了统一的数据结构,同样适用于用户自定义零件,使用户可以方便地对零件库进行扩充。模型既可在参数化环境中实现,又可在非参数化环境中实现,具有较好的通用性。

This paper proposes a new design method and implementation techniques of a general part library in CAD system. By introducing object-oriented ideas, the part library has an unified data structure and manipulation interfaces. Users are adimitted to create not only standardized parts but also user-defined parts.Users can expand and modify library whenever necessarily. On the other hand, this model can be implemented in parametric environment as well as non-parametric environment.