STEP格式钣金模型特征识别  

Feature Recognition for Sheet Metal Model in STEP Format

作　　者：吴祥宇 王雪飞[1] 华顺刚[1] 

机构地区：[1]大连理工大学机械工程学院,辽宁 大连

出　　处：《机械工程与技术》2021年第1期121-131,共11页Mechanical Engineering and Technology

摘　　要：针对STEP格式钣金模型,研究了一种特征识别方法用于提取交换格式模型中的特征信息。首先,从钣金B-rep模型中提取面、环和边等拓扑信息进行分类和组合,创建与特征有关的榫接面集、腹板面集和弯边面集。然后结合环、边信息,根据几何形状识别钣金件的基础特征、修剪特征和变形特征,判断特征间的父子关系并提取特征参数。实验表明该方法可有效识别出标准交换格式钣金模型的特征。Aiming at the sheet metal models in STEP format, a feature recognition method is studied to extract the model’s feature information. First, the geometrical and topological information including the face, loop and edge are gained and classified. The joggle face-sets, web face-sets and flange face-sets are created after grouping faces. By combining these face-sets with loops and edges, the base feature, trim feature and deformation feature could be recognized. After that, the feature re-lationships are judged and parameters are extracted. Experiments proved that our method is ef-fective for recognizing the features of sheet metal models in standard exchange format.

关 键 词：STEP格式 钣金模型 特征识别 拓扑信息 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]