小口径非球面透镜模压成形加热加压参数仿真  

Simulation of the Heating and Pressing Parameters of Micro Aspheric Lens Molding Process

作　　者：尹韶辉[1] 霍建杰[1] 周天丰[2] 朱科军[1] 王玉方[1] 靳松[1] 余剑武[1] 

机构地区：[1]湖南大学国家高效磨削工程技术研究中心微纳制造研究所,湖南长沙410082 [2]日本东北大学

出　　处：《湖南大学学报（自然科学版）》2011年第1期35-39,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50975804)

摘　　要：为了预测某小口径非球面透镜模压成形加热、加压的加工参数，建立了模压模型，设置了相应的边界条件，利用有限元软件对加热、加压过程进行了数值计算．分析了540～590℃模压温度下D-ZK3玻璃充型情况，确定该玻璃的适宜模压温度为580℃左右，模压温度越高残余应力越小．分析了580℃模压温度下的加热过程，确定该条件下最短加热时间为155S左右．模压后，残余应力边缘大中心小；而应变上部大底部小．研究了3组加压速率下残余应力分布，得到了玻璃模压后平均残余应力随加压速率增大而增大的关系．To predict the heating and pressing parameters of a micro aspheric lens molding process, a molding process model was established and all the boundary conditions were set. Based on the finite element software numeri- cal simulation, mold filling condition of glass I）-ZK3 at 540~590 ℃ was analyzed, and the optimum molding tempera- ture was about 580 ℃. The results have shown that the higher the molding temperature, the smaller the residual stress, and the minimum heating time for this model is about 155 s at 580 ℃ molding temperature. Residual stress af- ter molding is larger at the edge of lens than at the center, and the strain is larger at the top than at the bottom. Fi- nally, three different molding velocities were analyzed, and the results have shown that the average residual stress of the lens increases with the increase of molding velocity.

关 键 词：非球面镜 黏弹性 有限元法 玻璃模压成形 

分 类 号：TH164[机械工程—机械制造及自动化]