基于特征的参数化设计方法

 从集成角度,分析了特征定义及信息构成,并采用层次结构表达特征信息。在此基础上提出特征最小构成单元特征面,通过附着面特征之间发生联系。在参数化造型时,以尺寸驱动方式修改特征形状与定位,提出用局部坐标架网表示特征之间位置依赖关系,最后,提出运用面向对象方法组织特征信息。

THE APPROACH TO FEATURE - BASED PARAMETRIC DESIGN

In order to faciliate the integration of a CAD / CAM system,the feature definition and infonnation construction are analysed and expressed by hierarehical structure.The feature face is a constructive unit for forining feature,and the feature relationship is established using feature attached face。During parametric modeling,the feature shape and locating can be modified by dimension driving,and the relationship between features is described by local coordinate frame. As necessary implementation,feature information is organised through objectoriented techniques, which is also discussed finally.