【摘要】 讨论了尺寸和公差的工程语义的表达，提出零件邻接表和尺寸邻接表的装置体分级建模方式，并由封闭环信息优化调整装置体零件邻接表，在此基础上提出了根据产品的装配特征、形状特征、精度特征和指定的封闭环信息自动生成装置尺寸／公差链的算法．更多还原

【Abstract】 This paper introduces engineering semantic representation of dimensions and tolerances. A new method for assembly modeling graded with the part adjacency list and the dimension adjacency list is presented. Some optimal strategies for regulating the part adjacency link of assembly are also descibed. An algorithm to generate the tolerance chain automatically is proposed according to the information of the assembly feature, form feature, precision feature and closing link.更多还原