基于STEP的电子束数模特征识别与再建CAD二次开发系统  

CAD redevelopment system of feature recognition and recon⁃struction for electron beam based on STEP

作　　者：唐博文 廖敦明[1] 唐绍宁 杨光 杨帆 TANG Bo-wen;LIAO Dun-ming;TANG Shao-ning;YANG Guang;YANG Fan(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;AVIC Manufacturing Technology Institute,Beijing 100024,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]中国航空制造技术研究院,北京100024

出　　处：《模具工业》2021年第3期1-6,共6页Die & Mould Industry

基　　金：国家重点研发计划项目(2017YFB1103100)。

摘　　要：电子束熔丝增材制造CAD设计过程中,中间格式STEP模型文件在NX中的转换差异及数模再建过程中特征操作重复繁琐,以NX Open API为开发工具,开发基于STEP格式文件的数模特征识别与再提取,开发了针对性的特征再建功能。此系统能处理CAD设计流程中的文件格式转换差异,提高设计效率与规范性。In the CAD design process of additive manufacturing of electron beam fuse,the differ⁃ences in the transformation of intermediate format STEP model files in NX,and the problems of re⁃petitive and tedious characteristic operations in the digital analog reconstruction process.NX Open API was used as the development tool to develop the digital model feature recognition and re⁃construction system based on STEP format file.The STEP format file was fixed in the process of transformation.Meanwhile,the feature recognition and extraction were carried out based on boundary matching method,and targeted feature reconstruction function was developed.The sys⁃tem could deal with the difference of file format conversion in CAD design process and improve de⁃sign efficiency and standardization.

关 键 词：电子束熔丝增材制造 STEP格式 特征识别 二次开发 

分 类 号：TG76[金属学及工艺—刀具与模具] TP391[自动化与计算机技术—计算机应用技术]