Research On Automatically Identifying Of Revolving Parts' Engineering Drawing And Forming Of Three-dimensional Model

At present, because of the need of advanced designing and manufacturing technology, three-dimensional model of part play a more significant role. For existented engineer drawings, it's a waste of energy for company to convert it to models directly. Research on automatically identifying of revolving parts'engineering drawing and forming of three-dimensional model is save engineer drawing in the format of DXF by vectorizing the drawing in order to identify useful feature and then form the three-dimensional model quicky and righty based on the secondry research of Pro/E.In this paper, the research faces to revolving parts, offers the method of forming three-dimensional model from drawing based on Pro/TOOLKIT applications after analysed the development of vectorization and secondry research of Pro/E techniques thoroughly. The first process is processing the drawing image, including image binarizing, noise-reducing, smoothing, and thinning, in order to get the important outline of the part to form the model. And then detect the line, circle and arc by Hough transformation. In the process of fitting a line,Ï€/2 line is used for the end point confirming, not only improved the speed of the motion, but also reduced the probability of fragmentary line. In the process of identifying, the strong robustness and normality is a good base for three-dimensional model's forming. In the process of recognizing arc, Randomized Hough Transform is used, it can improve the speed of program. The system also include edit, modify and DXF file's save of the drawing recognized.Three-dimensional model's forming takes advantage of Pro/E in forming, open the vector Files in Pro/E and form the model. For the details of feature, user-defined feature library is made in this paper. In the process of using, user can select the feature needed to put on the rovelving part. It can put feature in different dimension if alterable dimension is set in the user-defined feature founding.At last, the parameterized design method based on the second research is researched. It uses an existing model as a sample plate, realized different parts'parameterized design in a same system. It's a great help of the speed of complex parts'design.