【摘要】 结合异地协同装配的特点,对产品特征信息进行了分类,在研究零件特征的公差信息表示基础上,建立了面向精度的产品层次模型。该模型分为层次关系层、关联关系层、特征信息层和特征元素层四层,通过建立层内各元素的关系链和层间信息的映射实现了产品信息的有机结合。研究了CAD零件信息与数字化装配系统的信息转换方法,采用面向对象技术实现了产品的装配建模。通过采用回溯算法搜索产品模型层次信息,实现数字化装配环境中产品装配尺寸链的自动寻找。更多还原

【Abstract】 Considering the characteristics of web-based collaborative assembly process,the product feature information was classified.And a precision-oriented digital product assembly model was put forward based on the tolerance expression of part feature.The model includes four layers: hierarchical relation layer,connectivity relation layer,feature layer and feature element layer.With the help of the relation chain within each layers and the mapping information among the layers,different engineering information is integrated.Information transformation technology from CAD system to digital assembly system was studied,and the product assembly model was built by using object-oriented method.Finally,a new algorithm of automatic generation of dimensional chains in digital assembly environment is brought out by using recursive searching algorithm.更多还原