敏捷化开发环境下产品装配建模研究

为了实现以自顶向下为主、自底向上为辅的双向产品设计方法,本文提出了一种面向产品族的混合装配模型。该模型由装配骨架模型、层次模型、约束关系模型、零件属性模型及参数化设计模型组成。通过引入高层次的装配骨架模型反映设计者的设计意图并自动向下游传播装配约束,实现自顶向下面向过程的设计方法;通过引入低层次的约束关系模型记录零件之间的各种约束关系,检验、改进和完成最终装配模型的重建,实现自底向上的面向结果的设计方法;通过引入参数化设计模型完成装配体的变形设计,实现以往知识的重用。最后用实例说明该混合装配建模方法的有效性。

Product Assembly Modeling in Agile Development Erwironment

To implement the top-down design method supported by the bottom-up design method,the paper proposed a hybrid assembly model based on product family,which is made up of assembly framework model,assembly hierarchical model,constraint relational model,part attribute model and parametric design model.The high-level assembly framework model was introduced to represent a designer′s intention and automatically transfer assembly constraints to the downstream phase,thus implementing the process-oriented top-down design method;the low-level constraint relational model was introduced to record various constraint relations among parts and to check,improve and complete the reconstruction of the final assembly model,executing the result-oriented bottom-up design method;the parametric!design model was imported to accomplish the variant design of an assembly body,reusing the previous knowledge.Finally,an oil pump was used to illustrate the effectiveness of the hybrid assembly model.