产品更改设计中尺寸数据传递流程分析

Analysis of dimension data transfer process in product change design

为了提高产品设计效率,从尺寸更改在零件间和零件内部关键结构间传播两个角度出发,探讨了产品更改设计过程中的尺寸数据传递流程。首先,分析了产品尺寸关联设计的基本逻辑结构,建立了更改传播逻辑元模型。然后,通过分析零件之间的装配关联及尺寸关联,建立了装配体中零件之间的关联路径以及尺寸关联更改传播模型;以变更零件为研究对象,基于零件建模过程,根据零件内部尺寸之间的连接与约束关系,建立了零件内部尺寸的更改传播路径,完成零件内部关键结构的尺寸更改传播;基于上述过程,完成了从更改源到零件直至零件内部特定尺寸的更改传播及其数据传递流程分析,最后,通过卷板机实例验证了所提方法的有效性。结果表明该方法可为产品的尺寸更改传播提供一种新的思路,为提高产品设计效率提供理论依据。

In order to improve product design efficiency,the dimension data transfer process in the process of change design is discussed from two aspects:the propagation of dimension change between the parts and between the key structures inside the part.Firstly,the basic logic structure of product dimension correlation design was analyzed,and the change propagation logic meta-model was established.Then,by analyzing the assembly correlation and dimension correlation among the parts,the correlation path among the parts in assembly and the propagation model of dimension correlation change were established.Taking the change part as the research object,according to the connection and constraint relationship between the internal dimensions of the part,the change propagation path for the internal dimensions of the part was established based on the part modeling process,and the dimension change propagation of the key structures inside the part was completed.Based on the above process,the whole change propagation and data transfer process analysis from the change source to the part and to the specific dimension inside the part were completed.Finally,the validity of the proposed method was verified by an example of a veneer reeling machine.The results show that this method can provide a new idea for the propagation of product dimension change,and provide a theoretical basis for improving product design efficiency.