红外技术, 2015, 37 (5): 392, 网络出版: 2015-06-11  

螺钉防松胶对反射镜面形影响的研究与试验

Research and Experiment of Influence on the Mirror Surface Figure Caused by Looseness-proof Adhesive
作者单位
中国科学院 长春光学精密机械与物理研究所, 吉林 长春 130033
摘要
反射镜组件作为空间相机的重要组件,在进行组件装配时,不但要保证其联接结构具有足够的联接预紧力以抵御动载荷或工作温度变化带来的影响,还要准确控制拧紧力矩避免对镜面面形造成较大的影响.以某空间相机的主镜组件为例,对螺钉防松的工作机理、采用防松粘接剂情况下的实际紧固力矩计算、对反射镜镜面的影响等方面进行了分析计算,并进行了试验验证.分析及试验结果表明,不同的螺钉防松胶对拧紧力矩、预紧力及反射镜面形造成较大的影响,其中,与不使用防松胶相比,硅橡胶(GD-414)和厌氧胶(J-222)对镜面面形的影响分别增加了31.9%和74%.在使用螺钉防松胶进行防松处理时,应根据不同防松胶的具体特性,调整螺钉拧紧力矩,在联接环节具有较高可靠性的同时,降低其对反射镜面形的影响.
Abstract
Mirror subassembly is the important component of space camera,so the sufficient pre-tightening force of the joint structure should be guaranteed to resist the effect caused by dynamic load or temperature change in component assembling,at the same time,tightening torque should also be accurately controlled to reduce the influence on the surface figure.The primary mirror of some space camera taken as an example,the principle of threaded connection’s looseness-proof,the precise tightening torque caused by looseness-proof adhesive,and the effect on surface figure are analyzed and calculated,and verification test is carried out.The results of both the analysis and the experiments indicate that different types of looseness-proof adhesive can make great influence on the tightening torque,pre-tightening force and mirror surface figure,which can be increased to 31.9% and 74% more with Silicon Rubber adhesive (GD-414) and anaerobic adhesive(J-222)used respectively compared with no looseness-proof adhesives.When looseness-proof adhesive used,tightening torque should be precisely adjusted according to the special properties of the adhesives so as to ensure that the reliability of joint structure is sufficient and the influence on the mirror surface figure is under control.

樊延超, 柴方茂, 李志来, 董得义, 徐宏. 螺钉防松胶对反射镜面形影响的研究与试验[J]. 红外技术, 2015, 37(5): 392. FAN Yan-chao, CHAI Fang-mao, LI Zhi-lai, DONG De-yi, XU Hong. Research and Experiment of Influence on the Mirror Surface Figure Caused by Looseness-proof Adhesive[J]. Infrared Technology, 2015, 37(5): 392.

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