Research For Reverse Software System Based On Three Dimensions Model On WEB

Reverse technology (reverse engineering, reverse design, converse engineering) is a modern engineering technology which is developed for enterprise to conquer competitors in the product competition. Traditional entity reverse technology is adopted to acquire point cloud information of product through many kinds of measurements, the point cloud information are processed with software, and it could be reversed to obtain shape, dimensions, precision of the product, but the precondition is that it must have entity reversed.With the development of internet technology, more and more products are used in the mode of three dimensions model on the net. If we could borrow ideas of the reverse engineering to process and pick up the information of three-dimension model of product on the net, and then we could use for reference or imitate foreign advanced product and design with reverse technology. By this means, it could narrow the gap of product design between our country and other developed countries. Therefore, researches on the reverse technology of three-dimension web model are of great use and new meaning.It has made researches on the reverse technology of three-dimension model, and obtained the research results as follows:Firstly, with the demand and current situations of new product development in the manufacturing industry, it makes a deep research and analyses to make sure the focus of software system of three-dimension web model. Secondly, it makes a comprehensive analysis on characteristics and formats of three-dimension web models, and brings forwards the approaches and general solutions for the reverse.The paper makes emphases on the two means for the reverse of three-dimension web model: STL reverse and MDT reverse. It transforms the three-dimension web model (mainly in VRML format) into the STL format and MDT format, which can be identified in CAD/CAM. The paper also makes the discussions over these two approaches.Finally, we have succeeded in developing prototype system of reverse software, which possesses the function of visualization, and the system has been verified andaccepted by the experts.