3 . the classification and the description of the assembly features are researched and the feature models of the parts are built in caxa, and the parts are assembled to hierarchical assembly model 3、研究了装配特征的分类及装配特征的描述,在caxa实体设计中进行零件的特征建模,并将这些零件装配成具有层次关系的装配设计模型。
In this thesis, a hierarchical assembly model for assembly planning is brought forward firstly, which is established by accessing the basic product data obtained from commercial cad systems . the data is then analyzed and classified into two layers . the low layer stores the basic geometric information like part's shape and position; the high layer stores the abstract information like contact and connection information 在本文的研究中,提出了一种面向装配规划的层次装配模型,该模型首先从cad系统获得产品装配模型的基础数据,在此基础上进行数据处理,将装配信息分两层存储,低层装配模型信息存储具体的零件几何形状与位置信息;高层装配模型信息存储零件之间抽象的接触和联接关系信息。