根据工艺需要进行设计特征模型调整的方法

Automatic Determination of Design Feature Adjustment Method According to the Desired Modification on Machining Features

保持不同领域特征模型的一致性是多领域特征建模的一个核心问题 .为有效地维护特征模型的一致性 ,提出一种根据对加工特征模型的修改要求自动确定设计特征模型调整方案的方法 .该方法从加工特征修改所涉及的拓扑元素出发 ,通过搜索拓扑元素约束关系图找出相关的拓扑元素约束链 ,并以此为基础 ,利用有关准则自动确定设计特征调整的最优方案 .该方法从加工的需求出发调整设计模型 ,保证设计与加工特征模型的一致性 。

A key problem with multiple view feature modeling is consistency maintenance of the model. The paper presents an approach to automatically adjusting the design features according to the requirements of machining process. In the approach, the design features that need to be adjusted are determined by searching the topological element constraint relation graph (TECRG) and marking out the topological elements affected by the desired modification on machining features. Moreover, the optimal adjustment method, if possible, is automatically verified according to the properties of TECRG, some implicit design intention and semantic information. After the design features have been adjusted, the machining feature model is updated accordingly, therefore the consistency is guaranteed.