According to the requirement of NC lathe turning automatic programming system

in order to solve how to express and put in parts information effectively

realizing NC programming automation

it has set up the data structures of parts of revolution solid (including geometric information and processing information).Through the method of intersection algorithm

it can put the pixel feature extraction information as well as its processing information in when clients pick up the pixel needed

realizing dealing with its data processing and storing its data structure with the dynamic link library technology. As it goes

different graphic pixel generates different types of lists and it can make the graphic input and reappear on the screen by different ways of opening database

realizing output of data structure required by the system.The efficiency of graphic input is improved

with technology support for visualization of virtual machining of the NC lathe turning offered.