摘要
扩展实体数据能有效地组织和关联零件模型中的图形信息和特征信息。本文提出了基于“标志”的扩展实体数据的特征定义模型 (包括加工特征模型和零件模型 ) ,并应用于集成化 CAD/ CAPP系统 SIP的特征定义子系统—— SIP- CAD,模拟实现了二维图形环境下回转类零件的“特征造型”功能 ,不仅提高了系统特征定义的层次、增强了特征编辑能力 。
Based on extended entity data,a feature definition model (including feature model and part model)based on “secondary group codes”was developed and successfully applied to a SIP CAD subsystem of SIP which is a CAD/CAPP integration system.Thus,“feature modeling”for rotational parts under Auto CAD environment was simulated and the process of feature definition was simplified.The consistence between geometrical and feature information was also ensured both on the run time and storage time.
出处
《机械设计与研究》
EI
CSCD
北大核心
2000年第1期22-23,共2页
Machine Design And Research
