光学元件模压成型三维有限元仿真  

3DFEM Simulation on Aspheric Optical Lens Molding Process

作　　者：段红杰[1] 李一浩[1] 白代萍[1] 

机构地区：[1]郑州轻工业学院机电工程学院,河南郑州450002

出　　处：《青岛科技大学学报（自然科学版）》2017年第1期93-98,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国际科技合作专项(2012DFG70640);河南省高等学校重点科研项目(15A460012)

摘　　要：针对非球面光学透镜在模压成型和模具设计中缺乏系统的、精确的理论分析手段,而主要依赖操作者的经验和反复试验的工艺现状;应用三维有限元分析方法仿真模压成型过程。采用五单元广义Maxwell模型描述玻璃加温加压时的蠕变特性,得出模具和透镜之间热传导特性和温度分布规律,获得了将玻璃毛坯加热到模压温度所需的最小加热时间。通过对非球面玻璃透镜模压成型过程进行模拟,发现透镜外边缘处的应力最大,导致透镜边缘处最易破碎,该结论得到透镜模压成型实际生产的验证。最后,仿真对比工艺参数对透镜最大应力分布的影响,获得最优的模压速度和模压温度范围。For lacking of a system and accurate means of theoretical analysis during the molding process of aspheric optical glass lens and mold design,it is mainly depended on the operator′s experience and technology status of trial and error.A three-dimensional finite element analysis method is used to simulate the molding process of aspheric optical glass lens.By using the generalized Maxwell model of five units to describe the creep characteristics of glass heating and pressure,the heat conduction characteristics and temperature distribution of the mold and lens are inferred,and the minimum heating time needed for heating the glass blanks to the molding temperature is also acquired.Through the molding process simulation,it is found that the maximum equivalent stress appeared the outer edge of the lens,which causes the edge of the lens to be most easily broken.And this conclusion is verified by the real molding results.Lastly,the optimal molding speed and the temperature range are obtained by comparing the maximum stress distribution of the lens with different shaping parameters.

关 键 词：光学技术与仪器 光学透镜 模压成型 三维有限元仿真 

分 类 号：TH164[机械工程—机械制造及自动化]