Development Of Automatic Glass Cutting System Based On PC's Management And CNC's Control

Glass is a kind of important architectural and ornamental material that is used widely in many fields such as building construction, automobile production, furniture manufacture and so on. And glass cutting is one of the important work procedures in the glass machining process. At present, compared with the same type of foreign products, home-made glass cutting equipments still have disparities in location precision, cutting speed, running dependability and so on. So, home glassworks generally use imported glass cutting equipments. And in recent years, with the development of information technology represented by computer technology, Computer Integrated Manufacturing (CIM) is applied to manufacturing industry gradually. Production mode of an enterprise is changing from single automation of producing process to integrated automation of all the process including product design, product manufacturing, quality assurance and so on. Referring to some advanced technology of foreign countries and following the basic idea of CIM, analyzing how to develop a complete glass cutting system based on PC management and CNC control is the main object of the dissertation.After briefly introducing the development of numerical control technique and the conception of CIM, the dissertation analyzes the functions of super-computer software and the hardware configuration of sub-computer and then forms rough system construction. Then some main parts of the software development such as database management, extraction of drawing information, materials optimization and the communication between super-computer and sub-computer are expatiated on. To the sub-computer module, the dissertation mainly presents design of electrical control system and data exchange in the control process, and then completely explains how the cooperation of PC, CNC and PLC realizes several critical operations such as going mechanical origin, jog moving and auto-running.In addition, the most crucial technique in glass cutting system, that is two-dimension cutting stock algorithm, is discussed in the dissertation. There are two algorithms presented. One is based on the intuitionistic heuristic thinking, and the other is based on a simplified mathematical model that reduces the problem from two-dimension to one-dimension. At the same time, the prospect of applying modern optimization algorithms such as simulated annealing and genetic algorithms to the problem is introduced briefly.Last,the process of system testing is summarized, and the main operation interfaces and operation steps of the system are introduced. Some proposal of improving system is brought forward in the end of the dissertation.