光学检测下气浮支承的玻璃薄板变形

液晶玻璃基板在线检测过程中对玻璃板在垂直方向上的变形量有严格的要求, 为了确定在指标要求光学检测精度下的喷嘴间距。本文基于弹性薄板的小挠度弯曲理论对气浮支承下的液晶玻璃板进行理论分析, 推导出液晶玻璃薄板在吹吸喷嘴作用下的最大挠度计算公式, 分析得出最大挠度与通孔间距的二次方、载荷集度成正比; 通过Fluent对液晶玻璃基板气浮支承系统进行仿真, 得到了不同的喷嘴孔间距下的载荷分布以及玻璃基板最大位移处受到载荷的准确值, 从满足玻璃板最大位移要求、气膜面的压力分布状况及经济性方面综合考虑得到气膜单元的通孔横向间距范围, 给出了采用气浮支承传输的液晶玻璃基板光学检测仪器的喷嘴布置参数, 即喷嘴的合理间距应处于20~25 mm 之间。

Abstract

There are strict requirements for the deformation of glass plate in the vertical direction in the process of on-line detection of LCD glass substrate. In order to determine the nozzle requirements in index spacing, the theoretical analysis of the LCD glass plate supported by gas suspension was carried out based on the small deflection bending theory of elastic sheet, and the LCD glass sheet maximum deflection formula under the action of the blowing and suction nozzles was derived. The analysis shows that the maximum deflection is proportional to the square of through-hole spacing and degree of load; The load distribution and the maximum displacement of the glass substrate under different nozzle through-hole spacings were obtained by the Fluent simulation on the LCD glass substrate gas suspension system. The maximum displacement of the glass plate, pressure distribution of the gas film surface and economic aspects were considered to obtain the range of the through-hole lateral spacing of the gas film unit. A type of nozzle layout parameter of the optical detection apparatus for the LCD glass substrate using gas suspension transmission was presented; the reasonable nozzle spacing should be between 20 mm and 25 mm.

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黄斌, 李程伟, 王晓梦. 光学检测下气浮支承的玻璃薄板变形[J]. 光学精密工程, 2018, 26(1): 114. HUANG Bin, LI Cheng-wei, WANG Xiao-meng. Deformation of glass sheet supported by gas bearing under optical testing[J]. Optics and Precision Engineering, 2018, 26(1): 114.

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