目的 针对典型正弯月非球面透镜,研究多站式玻璃模压工艺过程中的温度参数优化方案。方法 建立适用于七站式模压工艺的有限元仿真模型,分析各工位温度间的耦合关系,生成合理的温度数据集。系统探究加热、模压与冷却阶段中关键温度参数对透镜成型质量的影响,进而开展温度参数的优化设计。结果 在加热与模压阶段,模压温度对透镜成型完整性具有决定性影响。P-SK57玻璃的最低有效模压温度为575 ℃,适当提高至585 ℃可增强温控调节的灵活性。为避免加热阶段产生过大热应力,第一站加热温度应低于415 ℃;第二站温度需高于玻璃转化温度,以降低模压阶段的玻璃内部应力;第三站温度则需与前两站协同调控,以实现良好成型效果。在冷却阶段,首站温度应低于玻璃转变温度（493 ℃）,但不低于455 ℃,以促进高温应力释放;第二站冷却温度宜控制在245~325 ℃之间,从而抑制因冷却速率过快而引起的残余应力激增。结论 本研究揭示了多站式模压过程中温度参数对透镜成型质量的影响机制,明确了各工位温度的优化设定区间,为保证透镜成型质量提供了理论依据与工艺指导。
Abstract
The work aims to investigate the optimization scheme of temperature parameters in the multi-station glass molding process with a typical positive meniscus aspheric lens as an example. A finite element simulation model tailored for a seven-station molding process was developed to analyze the thermal coupling relationships among stations and generate a scientifically valid temperature dataset. The effects of temperature parameters during the heating, molding, and cooling stages on the final lens forming quality were systematically investigated. Temperature optimization was then carried out based on the identified mechanisms. In the heating and molding stages, the molding temperature played a decisive role in determining the forming integrity of the lens. For P-SK57 glass, the minimum effective molding temperature was identified as 575 ℃, while an increase to 585 ℃ enhanced flexibility in temperature regulation. To avoid excessive thermal stress during the heating stage, the heating temperature of the first station should be maintained below 415 ℃. The temperature of the second station must exceed the glass transition temperature to effectively reduce internal stress during molding, while the third station required coordinated control with the preceding stations to ensure optimal forming outcomes. During cooling, the first station temperature should be kept below the glass transition point (493 ℃) but not lower than 455 ℃, to facilitate the release of high-temperature stress. The temperature of the second cooling station should be controlled between 245 ℃ and 325 ℃ to prevent excessive residual stress caused by rapid cooling. This study reveals the influence mechanism of temperature parameters on lens forming quality during the multi-station molding process and determines the optimal temperature ranges for each station, thereby providing theoretical guidance and process references for ensuring high-quality lens forming.
关键词
多站式玻璃模压 /
温度优化 /
成型率 /
残余应力 /
黏弹性
Key words
multi-station glass molding /
temperature optimization /
forming ratio /
residual stress /
viscoelasticity
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基金
国家自然科学基金（52375179, 51905141）; 中央高校条件建设经费（JZ2021HGTB0086）
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