Research On Important Technologies For Computer Integrated Manufacturing System

The manufacturing industry is the foundation and the prop of national economy. The research on manufacturing mode is always emphasized by all countries. Today the internationalization competition is more and more intense, the manufacturing industry is also having the transformation and the traditional management pattern innovates unceasingly. The enterprise has to enhance own flexibility and the productivity. CIMS is precisely proposed for meeting the demand. On the other hand, the computer science and networking technology progress rapidly. They combine with the production technology closely. It has provided the feasibility for CIMS and widened the path for flexible automation. CIMS has solved the contradiction between high flexible and high productivity in the production system. Many countries think generally CIMS will become the new production method which will occupy the dominant position in 21 century and it is the foundation of other manufacturing philosophy.The technologies in CIMS may be divided into three aspects: product development and design technology, production management technology, workshop technique of manufacture. Regarding the product development and design technology, the characteristic-model-based integrated design technology which is based on the CAD/CAPP/CAM software named IE-CAM (developed by work group) is studied. Then the establishment method for parametrization-hole-model is emphatically discussed. The intelligent recognition technology for interactive operation is developed. The optimization for hole-group-processing craft route is carried on. Regarding the production management technology, the PDM plan based on the MSOFFICE is proposed in the article. Regarding the workshop technique of manufacture, the swarm intelligence algorithms are used to solve the facility layout optimization problem.CAD/CAPP/CAM is the key technology in CIMS. Characteristic-based product modelling is the effective method which realizes 3C integrating. At first the characteristic-modelling principles are summarized and the classification and hierarchical structure of characteristic are expresssed. Then they are described by the object-oriented method. The parametrization-modelling process is elaborated. The feature recognition function is introduced and CAPP for shape processing is discussed. The characteristic and the structure of the engineering database are analyzed. Because the model of holes and the hole-...