Computer-aided design, manufacturing and inspection system integration for optical lens production

Abstract

The main objectives of this research are the development of an integrated manufacturing strategy and the construction of a database management system for the design, machining and inspection of sculptured surfaces. Speci®cally, the optical lens for colour display tube/colour picture tube is selected as an application example to show the e ectiveness and e ciency of the developed manufacturing strategy and database construction methods. In the machining strategy, the total machining time reduction method is proposed for the rough cutting operation based on the optimum tool path planning. In the ®nish cutting operation, a modi®ed cutter contact variable step method is employed, and optimal tool paths are generated by selecting the proper tool radius within the given tolerance of a designed model. In the inspection strategy, the shortest measuring path is calculated to reduce the inspection time in CMM. In addition, an e cient database management system, which conducts the process from the surface design stage to the inspection result analysis stage, is constructed for the optimization of the sculptured surface manufacturing process. Finally, the required simulation and experimental works are carried out to verify the proposed strategy. IntroductionThe design of manufactured products is a process that has been changing rapidly, and new product designs tend to be more aerodynamic and sophisticated. These design shapes, called sculptured surfaces, are found in a wide range of products, such as automobile bodies, mould cavities and stamping dies. Therefore, the design and manufacturing of sculptured surfaces with a short lead-time, high accuracy, and reduced cost is of utmost importance to manufacturers.In the manufacturing of sculptured surfaces, there are many steps involved, such as design, rough cutting, semi-®nish cutting, ®nish cutting and inspection. Since the necessary information involved in the di erent stages is related to that is the other stages, the right information should be connected to the right place to achieve an e ective manufacturing process. For example, the tolerance of the ®nal product is directly related to the cutting allowance and tolerance through the variable steps in the cutting processes. Thus, by considering the allowance and tolerance, appropriate tools in each cutting step should be selected in order to reduce the necessary cutting steps and to save total machining time. In addition, the total machining time should be estimated by considering depth-of-cut, feed-rate and height of layers with the

Design and Implementation of Building Safety Production Inspection Management System based on Internet Technology

“…It compulsorily separates the input, processing, and output of the application, reducing the degree of coupling between modules and providing the expansibility of the application. The whole system structure consists of three modules: model, view and controller, each module assuming different functions [13][14]. Model: The model encapsulates data and data operation.…”