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针对目前具有微结构光学元件在模压过程中模具形状很难完全复制到光学元件上这一问题,利用MSC.Marc软件,结合光学玻璃材料的黏弹性本构方程建立V形槽、矩形槽、梯形槽和圆弧槽的2D有限元模型,探究4种不同形状微槽结构在模压成形加压阶段的成形过程。以V形槽结构为研究对象,探究模压速度对填充率的影响规律;对不同形状微槽结构在模压过程中的应力分布情况进行分析;通过计算得出相同模压参数下各微槽结构的填充率。结果表明:模压速度不是影响模压填充效果的主要因素,然而随着速度的增加,加压结束后的最大应力增大;4种不同形状微槽结构加压结束后最大应力均出现在槽的拐角处,其中V形槽的最大应力最小,矩形槽的最大;不同微槽结构玻璃填充效果不同,其中圆弧槽玻璃的填充率最大,矩形槽的最小。
Aiming at the problem that the shape of the microstructured optical element is difficult to be completely copied to the optical element during the molding process, the MSC.Marc software and the viscoelastic constitutive equation of the optical glass material are used to establish the V-shaped groove, the rectangular groove, the trapezoidal shape Slot and arc slot 2D finite element model to explore the four different shapes of micro-groove structure in the forming pressure during the forming process. The V-shaped groove structure is taken as the research object to study the influence of the molding speed on the filling rate. The stress distribution of the micro-groove structures with different shapes in the molding process is analyzed. The filling of each micro-groove structure under the same molding parameters rate. The results show that the mold pressing speed is not the main factor that affects the mold filling effect. However, with the increase of the speed, the maximum stress at the end of the pressurization increases. The maximum stress of the microchannel structures with different shapes after the pressurization is at the corner Among them, the maximum stress of V-shaped groove is the smallest, and the largest of rectangular groove. The filling effect of glass with different microgroove structure is different, among which, the filling rate of the circular groove glass is the largest and the rectangular groove is the smallest.