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针对并行工程的需求，提出广义键概念，广义键ＧＬ（ｇｅｎｅｒａｌｉｚｅｄｌｉｎｋ）是描述两个装配零件之间的所有装配关系的信息集，基于广义键建立了面向并行工程的产品装配模型，并给出了产品装配模型的数据结构，提出采用多重装配连接图表示零件之间的多重装配关系，基于广义键建立的产品装配模型可表示两个零件之间复杂的多重装配关系，为产品可装配性评价和装配工艺过程设计提供了丰富的产品装配信息，为实现ＣＡＤ／ＤＦＡ的信息集成打下良好的基础，该装配模型可支持并行工程。
According to the requirements of parallel engineering, the concept of generalized key is proposed. Generalizedlink (GL) is a set of information describing all the assembly relations between two assembly parts. Based on the generalized key, a product assembly model for parallel engineering is established. The data structure of product assembly model is proposed. The multi-assembly connection diagram is used to show the multi-assembly relationship between parts. The product assembly model based on the generalized key can express the complex multi-assembly relationship between two parts. Assembly process design provides a wealth of product assembly information, in order to achieve CAD / DFA information integration and lay a good foundation, the assembly model can support concurrent engineering.