Shu Chengsong, Zhang Daoheng, Yin Shaohui, Huang Shuai, Yin Cunhong
School of Mechanical Engineering, Guizhou University, Guiyang 550000, P.R. China.
National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha 410082, P.R. China.
iScience. 2025 Jun 26;28(7):113016. doi: 10.1016/j.isci.2025.113016. eCollection 2025 Jul 18.
Addressing challenges in controlling viscoelastic shrinkage-induced thermal deformation errors in precision glass molding, this article proposes a mold compensation method that combines the pre-compensation of form error prediction based on molding simulation and higher-order form error compensation based on molded glass lens. Results indicate that the coupling effects of volume relaxation and glass/mold thermal expansions are identified as primary causes of glass lens form error. The form error of the molded lens can be markedly reduced through the mold pre-compensation, with the form error of the aspheric lens being pre-corrected from the simulation-predicted PV 7.187 μm to approximately 0.6 μm. Further compensating for higher-order form errors in molded glass aspherical lenses enhances the form accuracy, resulting in an improvement of the aspherical lens form accuracy from PV 0.6186 μm to PV 0.1525 μm. This approach effectively improves compensation accuracy, reduces compensation times, and is applicable to industrial glass lens production.
针对精密玻璃成型中控制粘弹性收缩引起的热变形误差的挑战，本文提出了一种模具补偿方法，该方法结合了基于成型模拟的形状误差预测预补偿和基于成型玻璃透镜的高阶形状误差补偿。结果表明，体积松弛和玻璃/模具热膨胀的耦合效应被确定为玻璃透镜形状误差的主要原因。通过模具预补偿可以显著降低成型透镜的形状误差，非球面透镜的形状误差从模拟预测的PV 7.187μm预校正到约0.6μm。进一步补偿成型玻璃非球面透镜的高阶形状误差可提高形状精度，使非球面透镜的形状精度从PV 0.6186μm提高到PV 0.1525μm。该方法有效提高了补偿精度，减少了补偿次数，适用于工业玻璃透镜生产。
