面向装配的适应性特征建模研究

目前CAD系统中的特征建模主要是面向零件级的建模,不易直接建立和维护零件间存在的关联特征的协调性模型,如键与键槽、螺钉与螺钉孔等。针对上述问题,本文在研究了零件间特征映射关系的基础上,提出了一种面向装配的适应性特征建模方法。在零件间关联特征建模时,融入特征间的映射规则,构建出相应的映射虚特征,进而通过虚特征与基体零件进行布尔差运算,建立出对应的关联特征,从而实现零件间特征的快速建模。最后以模具设计为例,验证了上述方法的有效性和实用性。

A Study of Adaptable Feature Modeling for Assembly

Currently in a modern CAD system, feature modeling is mainly based on single parts, which is difficult to directly establish and maintain a model for coordinating the associative features among the parts such as pins and keyways, bolts and screws etc. Faced with the above problem, the paper studied the mapping of an adaptable feature modeling method for assembly. During the modeling of associative features among parts, the rules for mapping features were integrated and the mapping virtual features were constructed. Furthermore, the associative features between virtual features and base parts were established by Boolean operations. This way the rapid modeling of features among parts was accomplished. The design of a punch die was used as an example to verify the usefulness and effectiveness of the method.