基于表达设计意图和支持产品设计全过程的思想,分析方案设计和技术设计过程及产品信息的形成过程,提出支持产品方案设计和技术设计的产品模型。给出了产品组成结构、装配关系和结构设计3类产品信息的模型,其中结构设计信息包括装配特征、工艺特征和结构特征。列举并分析实现装配关系的装配特征实例,研究装配关系与装配特征间的功构映射,提出依据工程实际建立装配关系与装配特征间的稳定映射,实现产品设计知识的显示表达。最后用实例说明产品信息的传递和生成过程,验证该模型的有效性。 Based on the idea of ​​expressing design intention and supporting the whole process of product design, this paper analyzes the process of project design and technology design and product information formation, and puts forward the product model that supports product design and technology design. The models of product composition, assembly and structural design are given. The structural design information includes assembly, process and structural features. An example of the assembly features to realize the assembly relationship is listed and analyzed. The mapping between the assembly relationship and the assembly features is studied. A stable mapping between the assembly relationship and the assembly features is proposed based on the actual project, so that the product design knowledge is displayed and expressed. Finally, an example is given to illustrate the transmission and generation of product information to verify the validity of the model.