基于IGES的钣金零件特征识别的方法研究  

Feature recognition method of sheet-metal based on IGES

作　　者：许加陈 游有鹏[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机电工程》2017年第6期582-585,602,共5页Journal of Mechanical & Electrical Engineering

基　　金：江苏省杰出青年基金资助项目(BK20160084)

摘　　要：针对钣金设计软件数据模型的外部读取与特征识别问题,对钣金设计软件的数据共享、IGES文件结构以及零件特征分类进行了研究,提出了一种基于IGES曲面模型的后置处理方法,通过遍历IGES文件,获取了钣金零件的所有裁剪参数曲面信息,建立了以折弯面作为结点的双向链表的数据结构,根据IGES文件的数据特征,对钣金零件进行了特征分类,提取了钣金折弯特征并建立了特征间的依赖关系。利用Pro/E软件绘制的钣金零件对特征识别方法进行了测试。研究结果表明,该方法能够准确地获取钣金的特征,为钣金零件折弯仿真与工序规划提供了可靠的特征数据,使得产品开发周期缩短了近30%,最终实现了钣金加工的精确性与高效性。Aiming at the external reading and feature recognition of data model from sheet metal design software, the data sharing between software, the structure of the IGES file and the feature classification of part were researched. The post-processing method that traversed the IGES file to get all the cutting parameter surface information based on IGES surface model was proposed. Then, the data structure of double-linked list structure with the bending surface as the node was established, and according to the IGES file data characteristic, the feature of sheet metal was classified and the necessary bend features and dependence was extracted. At last, the method of feature recognition was test-ed on the sheet metal parts drawn by the Pro/E software. The results indicate that the method can accurately obtain the characteristic of sheet metal and provide reliable data for sheet metal part bending simulation and process planning and make the product development cycle by 30%. Ultimately, the accuracy and efficiency of processing are achieved.

关 键 词：IGES文件 钣金零件 特征识别 

分 类 号：TH165[机械工程—机械制造及自动化] TP391[自动化与计算机技术—计算机应用技术]