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尺寸链是连接CAD与CAPP之间关系的重要特征信息 ,而生成尺寸链前必须清楚地了解组成尺寸链的相关配合零件链。讨论了如何根据装配体零件配合特征、配合信息及零件拓扑关系自动获取零件的装配体配合零件链 ,并进一步获取装配体的配合尺寸链。使用这种方法可以唯一地确定机械装配体的配合零件链 ,对于复杂装配体进行尺寸链分析非常有效
The dimension chain is an important characteristic of the relationship between the CAD and the CAPP. Before the dimension chain is generated, it is necessary to clearly understand the relevant part chains that form the dimension chain. The paper discusses how to automatically obtain the assembly of the parts with the parts chain according to the cooperation features of the assembly parts and the information and topological relations of the parts, and further obtain the matching size chain of the assembly. Use this method to uniquely identify the mating parts chain of a mechanical assembly, which is very effective for the dimensional analysis of complex assemblies