铝合金车体加工部件加工特征识别方法研究

Research on Machining Feature Recognition Method of Aluminum Alloy Car Body Machining Parts

为提高铝合金车体加工部件加工效率,减少加工工艺准备时间,提高车体加工部件加工特征识别准确率,研究铝合金车体加工部件加工特征识别方法。以车体加工部件为研究对象,通过分析其加工特征与结构特点,采用基于图像的特征识别方法和基于特征提取面与特征边界环的分步特征搜索方法,分别提取车体加工部件加工特征,构建属性邻接图和特征面集。针对车体加工部件相交特征的特点,提出非加工实体面的概念,设计相应的相交特征识别与处理准则,为后续车体加工部件加工的自动化编程提供理论支撑。

In order to improve the production efficiency of machining parts of the aluminum alloy car body and re⁃duce the processing preparation time,improve the machining feature recognition accuracy of car body machining parts,research on feature recognition method for machining parts of the aluminum alloy car body is carried out.Based on the analysis of the machining features and structure characteristics of the machined parts of the car body,the image⁃based feature recognition method and the step by step feature search method based on feature extraction surface and feature boundary ring are used to extract the machining features of the machined parts of the car body,and the attribute adjacency graph and feature surface set are constructed.According to the characteristics of intersect⁃ing features of machining parts of the car body,the concept of non⁃machined solid surface is put forward,and the cor⁃responding intersecting features recognition and processing criteria are designed,which can provide the correspond⁃ing theoretical support for the automatic programming of the following machining parts of the car body processing.