特征在加工过程中的变异性研究

Research on Variability of Features in Manchining Processes

从加工工艺角度分析特征在加工过程中的演变规律。提出了变异特征的概念 ,探讨了变异特征在结构、属性、类型等方面的变异特点。给出了变异特征属性邻接图和边面关联矩阵 ,表达了变异特征组成面之间的有机联系。通过一般产品上特征的变异性定义 ,实现了基于变异特征的零件建模 ,并在夹具安装规划自动设计系统中初步应用 。

This paper presents a concept of variation feature and investigates the variation characteristics of variation feature at the aspect of structure, attribute and type by analyzing the evolvement law of feature in machining process as viewed from technology. The attribute adjacent graphics and the interrelated matrix for edge and face of variation feature were given. The organic relation between component faces of variation feature was expressed. The variation feature-based modeling was achieved by the definition of variability of feature on the general product model. The ideal setup of a fixture was obtained in the automatic design system of fixture setup planning.