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小口径非球面透镜模压成形加热加压参数仿真
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Simulation of the Heating and Pressing Parameters of Micro Aspheric Lens Molding Process
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    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155 s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.

    Abstract:

    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 numerical simulation, mold filling condition of glass D-ZK3 at 540~590 ℃ was analyzed, and the optimum molding temperature 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 after molding is larger at the edge of lens than at the center, and the strain is larger at the top than at the bottom. Finally, 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.

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尹韶辉,霍建杰,周天丰,朱科军,王玉方,靳 松,余剑武.小口径非球面透镜模压成形加热加压参数仿真[J].湖南大学学报:自然科学版,2011,38(1):35~39

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