Numerical Simulation of Glass molding Process for Large Diameter Aspherical Glass Lens

In order to obtain the approximate precision molding process parameters of large diameter aspheric glass lens and predict the residual stress of the lens, a thermodynamic coupling model was established by using FEM software—ABAQUS. Meanwhile, we obtained the filling ratios of large diameter aspheric glass lens at different temperatures and pressures. Furthermore, the work analyzed the different process parameters effecting distribution of residual stress. In the large aspherical glass molding process, the annealing rate has a great influence on residual stress, and the molding velocity and pressure effect the stress inside glass in the forming stage. The more important, mathematical optimization of the temperature of molding and annealing for different glasses can improve the production efficiency. It is expected that the simulation of large diameter aspherical glass lens is a meaningful way to investigate the isothermal glass molding process. (paper)