The Study And Application Of Enabling Technology For Agile Manufacturing

Presently, the market competition intensifies day by day. Enterprises must respond rapidly to the changing and uncertain market in order to overcome their competitors. Aimed to improve enterprises' ability in the rapid development of new products, this dissertation studied a kind of integrated system of reverse engineering, including data acquisition and processing sub-system, model reconstruction sub-system and product manufacturing sub-system, for enabling technology of agile manufacturing.It compared the methods of usual data acquisition, analyzed the equipments and tactics of data acquisition, discussed the technology of point cloud data preprocessing about data registration, smoothness, reduction and segmentation in the chapter of data acquisition and processing.In the chapter of model reconstruction, surface reconstruction based on triangular Bezier surface, B-spline and NURBS surface was introduced. The reverse modeling technique based on the feature of surface or section was discussed next. Then the key technology of RE/CAD combined solid modeling was analyzed. A new modeling method about the extracting of section feature line based on point cloud cross section was proposed, which can avoid the complex triangular factor calculation of large-scale confused point cloud, improve the efficiency of modeling and reduce the error of reconstruction. Lastly the quality evaluation of reverse model was analyzed.The theory and process of rapid prototyping and rapid tooling, the technology optimization of numerical control machining were discussed in the chapter of product manufacturing based on reverse engineering.In the chapter of engineering application, the reverse engineering solid modeling of an automobile valve based on the Imageware and UGII software was completed, the objects were then manufactured using rapid prototyping, rapid tooling and numerical control machining technique. The experiments prove the validity and feasibility of the system, the precision and efficiency attain to the demand already, and the system can be modified and applied.