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针对发动机零件展开了基于特征的参数化实体造型研究 ,探讨了其实现方法 .参数化方法使用户构造几何模型时可以集中于概念和整体设计、充分发挥创造性、提高设计效率 ;基于特征的技术为设计者提供符合人们思维的设计环境 .把参数化方法和基于特征的技术有机地结合起来进行实体造型将极大地提高设计效率 .用AutoLISP语言对AutoCAD1 4进行了二次开发 ,建立了基于特征的参数化发动机零件实体造型系统 .系统包括 :发动机零件特征库 ,发动机零件模型库和用户界面 .该系统为设计者提供了方便快捷的实体造型支持
Aiming at the engine parts, a feature-based parametric solid model was developed and its implementation method was discussed.The parametric method allows users to focus on the concept and the overall design when constructing the geometric model, give full play to the creativity and improve the design efficiency. The feature-based technology is Designers to provide a design environment that meets people’s thinking.The combination of parametric method and feature-based technology for physical modeling will greatly improve the design efficiency.Make use of AutoLISP language AutoCAD1 4 for the second time to develop a feature-based Parametric engine parts solid modeling system.The system includes: engine parts feature library, engine parts model library and user interface.This system provides designers with convenient solid modeling support