并行CAD/CAM集成中的产品模型表示方法研究

REPRESENTATION SCHEME OF PRODUCT MODELS FOR CONCURRENT CAD/CAM INTEGRATION

提出了适用于并行协同CAD/CAM集成方式的产品模型表示方法。基于特征表示面向并行的产品模型,设计模型和制造模型有机地混合在同一表示中,可以同时满足设计与各制造环节的需要;用特征相关图完整地描述了各种类型特征之间(包括设计特征之间,设计特征与制造特征之间及制造特征之间)的相关关系,并利用双数据项字符矩阵全面地表示了特征相关图。

A strategy for representing the concurrent\|oriented product model is proposed. Traditional representing methods must be improved under the new design idea and integrating mode. The representation of concurrent\|oriented product model is feature\|based. Design features and manufacturing features exist in a same model and are interrelated. Manufacturing features are recognized from Design\|Feature Based Model. Furthermore, once a model is constructed successfully, all the integrating work is completed and needs no transition. The product models' representing scheme is also designed. A product model is a reasonable combination of the representation of the following aspects: boundary geometry (B\|Rep), design feature, manufacturing feature and the relationship among design features and manufacturing features. Feature Relation Graph is designed to completely describe the relationship among design features and machining features. Furthermore, Double\|Data String Matrix is proposed to represent Feature Relation Graph perfectly. The models represented by the proposed method can meet both the needs of design and manufacture.