It is difficult to exchange parametric assembly models using conventional neutral formats such as the standard for the exchange of product model data or the initial graphics exchange specification. These formats only support the boundary representation information that leads to the inability to perform parametric re-evaluation, once a model is exchanged. In order to exchange parametric information along with the design intent, a design history-based macro-parametric approach was proposed. Our method is macro-parametrics approach, however, supported only the exchange of individual part models. As most of the products are manufactured in assemblies, where several components are connected with multiple constraints, it is necessary to exchange the assembly model data. To overcome the issue of post-exchange editability, a collection of neutral assembly commands was introduced to extend the capabilities of the macro-parametric approach. A set of neutral assembly constraints was defined and a system for exchanging the parametric assembly models was implemented. An assembly model consisting of coaxial and incidence constraints was successfully exchanged between two commercial computer-aided design systems: CATIA and NX. It was possible to re-evaluate the assembly model parametrically after the exchange. The method can be further extended to exchange the remaining constraint types in different commercial computer-aided design systems.

中文翻译：

---

基于中性装配约束的参数装配模型交换

使用传统的中性格式（例如用于交换产品模型数据的标准或初始图形交换规范）来交换参数化装配模型是很困难的。这些格式仅支持边界表示信息，一旦交换模型，将导致无法执行参数重新评估。为了与设计意图一起交换参数信息，提出了一种基于设计历史的宏观参数方法。我们的方法是宏观参数方法，但是，仅支持单个零件模型的交换。由于大多数产品是在装配中制造的，其中多个组件连接多个约束，因此需要交换装配模型数据。为了克服交换后的可编辑性问题，引入了一组中性装配命令以扩展宏观参数方法的功能。定义了一组中性装配约束，并实现了一个用于交换参数装配模型的系统。由同轴和入射约束组成的装配模型在两个商业计算机辅助设计系统之间成功交换：CATIA 和 NX。可以在交换后参数化地重新评估装配模型。该方法可以进一步扩展以在不同的商业计算机辅助设计系统中交换剩余的约束类型。由同轴和入射约束组成的装配模型在两个商业计算机辅助设计系统之间成功交换：CATIA 和 NX。可以在交换后参数化地重新评估装配模型。该方法可以进一步扩展以在不同的商业计算机辅助设计系统中交换剩余的约束类型。由同轴和入射约束组成的装配模型在两个商业计算机辅助设计系统之间成功交换：CATIA 和 NX。可以在交换后参数化地重新评估装配模型。该方法可以进一步扩展以在不同的商业计算机辅助设计系统中交换剩余的约束类型。