Abstract
The required accuracy for the final dimensions of the molded lenses in wafer-based precision glass molding as well as
the need for elimination of costly experimental trial and error calls for numerical simulations. This study deals with 3D
thermo-mechanical modeling of the wafer-based precision glass lens molding process. First, a comprehensive 3D thermo-mechanical
model of glass is implemented into a FORTRAN user subroutine (UMAT) in the FE program ABAQUS, and
the developed FE model is validated with both a well-known sandwich seal test and experimental results of precision molding
of several glass rings. Afterward, 3D thermo-mechanical modeling of the wafer-based glass lens manufacturing is performed to
suggest a proper molding program (i.e., the proper set of process parameters including preset force-time and temperature-time
histories) for molding a wafer to a desired dimension and quality. Moreover, the effect of some important process parameters
such as cooling rate and pressing temperature on the final size and residual stress inside the wafer is evaluated. Finally, it is
noted that the suggested molding program minimizes the costly empirical efforts and raises the process efficiency.
Original language | English |
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Journal | International Journal of Applied Glass Science |
Volume | 6 |
Issue number | 2 |
Pages (from-to) | 182–195 |
ISSN | 2041-1286 |
DOIs | |
Publication status | Published - 2015 |