Study On Numerical Simulation And Experiments Of Float Glass Forming

Glass is widely used non-crystal material. The float process is now the main technique for the production of flat glass and the whole world is carrying out the researches on critical techniques of such process. Because all the factories keep the parameters of molding process a strict secret and the float process is very complex, at present, the empirical method is widely applied to the production of float glass, which has problems of long time adjusting of molding process, high production cost and difficult exploration of new products. Therefore, it is both practically important and theoretically significant to make systematical studies, in approaches of numerical analog and statistical analysis, on the distorted law and the temperature distribution of liquid glass, the influence of tin depth on glass surface and the key parameters for the molding process with different thickness of glass. This paper is systematically applied to the studies above.The relation between the temperatures and different thickness of glass under the same heat transfer conditions and the influence of glass temperatures on heat transfer of glass in the tin bath are analyzed in this paper on the basis of the analysis of heat transfer of glass in the tin bath in the heat transfer process of glass ribbon for the establishment of the mathematical model of heat transfer of float glass in the tin bath. With the establishment of the mathematical model for the simulation of the mathematical model, the tendency of the tin depth of float glass is obtained for different temperature of SO2, and the studies on the mechanism of tin depth are made. In this way, a method of tin depth control for the improvement of float glass is given theoretically. Such tendency of tin depth and the mathematical model are proved right as a result of experiments and tests.In this paper, the regular patterns of glass ribbon in length and the distribution of the float glass in thickness along width under the initial and ultimate certain velocities are obtained from the characteristics of the molding of glass ribbon and the three-dimension finite element model about float glass ribbon through the technology of free surface in CFD. The research results with experimental results are also compared with each other.On the basis of a large number of experiments and tests, the distribution law of different speeds and angles of rollers in different places as well as the relations between the speeds of rollers and the thickness of glass are studied in this paper for the production of glass in different thickness. The formulas obtained are important to both the adjusting of rollers in production and the exploitation of the auto control system on rollers.This paper lays a solid foundation for the systematical studies on the molding process and a dummy system of float glass production with the help of heat transfer and the flow of liquid glass models, the disposal model of calculation results, the physical and chemistry correlation models for actual production and the highly integrated model for the coupling of these models, which will surely play an important role in the studies of production process, quality upgrading and the reduction of test costs.