Feature Modeling Method Research On Revolving Model Parts

Feature mode1ing technology is the requirement for developmentof the advanced manufacturing technology. Mode1 ing a shared featuremode1 of parts is one of the key techno1ogies of CAD/CAPP/CANintegrated system. Feature mode1ing system can provide not only thegeometry information of parts, but also process information of theparts, which latter procedure CAM system needs, to real ize share andexchange for information between each CAX systems.The aim of this research work is to research how to rea1 ize thatthe geometry information and process information of the part isdescribed and extracted whi 1e parametric feature part drawing isformed by means of feature mode1ing for revo1ving mode1 parts.Features act as media to realize share and exchange for informationbetween design and manufacture in order to fit the requirements fordeve1opment of modern techno1ogy and rapid renewal of products.This paper carries out to research for the method of theinformat ion prescription and information extraction of parts on thebase of the fundamenta1 principles of Group Technology (GT) andConcurrent Engineering (CE). The output of the geometry informationand process information is completed by means of prescription andextract ion with code form and feature surface prescription method forthe contour features, material features, precision features,technica1 features and management features of the revolving mode1parts, that is, while parametric feature part drawing is formed a11feature information is memorized in a data fi1e.Under the condition of AutoCAD and Visual LISP, there--developing, that is, the bui1ding of the feature mode1 1ibrary,the progranuning of the parametric feature drawings and the design ofthe interface for user by means of AutoLISP and DCL, is carried outin order to realize the parametric feature design of the revolvingmodel parts by program driving method and to rea1ize the extractionand output of information.This software design with modularizing has design interfaces ofextension and perfection of functions.