Based on the VGC(Variational Geometric Constraints) theory, a rule to set up the loop circuit for assembly dimension chain is put forward. The generation method of VGC network for assembly dimension chain is presented.

• 根据变动几何约束理论，给出了配合回路的生成规则，提出了面向尺寸链的变动几何约束网络的生成方法。