基于实例的汽车覆盖件模具结构智能CAD

Case-based intelligent CAD for Die structure of automobile panel

覆盖件模具的设计和制造是开发汽车新车型的“瓶颈”环节。鉴于覆盖件模具结构的特点，其设计质量完全取决于设计人员的经验和水平，难以保证。本文阐述了汽车覆盖件模具结构设计采用智能CAD的原因和意义，分析了基于实例设计（CBD）方法优势，指出CBD方法是最常用、也是最为成功的用于模具结构设计的智能CAD方法，论文提出了“实例＝实例模型＋实例数据”的描述方法，在正确处理设计尺寸参数化程度的基础上，通过建立面向装配的实例模型和推理机制，成功地进行了基于实例的覆盖件模具结构智能设计。

The design and manufacture of automabile panel' s die is a 'bottleneck' for the development of a new type of automobile. Because of the characters of panel' s die structure,the design qualities wholly depend on the experiences and skills of die designer and are guaranteed difficultly. This paper describes the reasons and significance of using Intelligent CAD to design panel' s die structure,analyzes the advantages of CBD and points out that CBD is the most common and successful method used in designing die structure. We bring forward the CBD method of 'Case = Case Model+ Case Data' and deal with correctly the degree of parameter. After the establishment of case model and reasoning mechanism for assembly,the die structure of panel is designed successfully with case-based Intelligent CAD.