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高精度反射器蜂窝拼接工艺
邱保强1,2,刘图远1,2,张娟娟1,2,魏海旭1,2,王伟1,2
1.上海复合材料科技有限公司,上海 201112;2.上海航天树脂基复合材料工程技术研究中心,上海 201112
摘要:
为解决反射器型面精度低的问题,通过对反射器的蜂窝拼接工艺特性进行理论分析,得到最优的拼接工艺,并采用该工艺进行试验验证。结果表明:正六边形蜂窝芯子拼接次数一般为3次或6次时,利于拼接后蜂窝结构对称,格型规整,降低面内刚度分布不均性,提高反射器型面精度;J-310A胶膜可作为高精度反射器的蜂窝拼接胶黏剂的首选,因其方便施工,固化后厚度尺寸小,大大降低不同材料的膨胀不匹配和刚度突变的影响,利于提高反射器型面精度;固定夹预加压后再与反射器共固化可以作为目前最优拼接工艺方法,此方法操作简便、成本较低;采用改进后的蜂窝拼接工艺制备的口径1.8 m反射器,其型面精度RMS=53 μm,相比传统的工艺提高了25 μm,且能满足设计要求。实验结果显示蜂窝合理的拼接方法可以有效避免泡沫胶与蜂窝的膨胀不匹配的影响,减少拼接处胶黏剂与蜂窝刚度突变的影响,提高蜂窝结构对称性,大幅提高反射器型面精度。采用此工艺方法拼接蜂窝还可以有效降低用胶量,减轻产品结构质量。
关键词:  反射器  蜂窝拼接  工艺方法  型面精度
DOI:10.12044/j.issn.1007-2330.2019.05.013
分类号:TB33
基金项目:
Honeycomb Splicing Technology of High Precision Reflector
QIU Baoqiang1,2,LIU Tuyuan1,2,ZHANG Juanjuan1,2,WEI Haixu1,2,WANG Wei1,2
1.Shanghai Composite Material Technology Co.,LTD.,Shanghai 201112;2.Shanghai Aerospace Resin Matrix Composite Engineering Technology Research Center,Shanghai 201112
Abstract:
In order to solve the problem of low precision of the reflector profile,the optimal splicing process was obtained by theoretical analysis of the honeycomb splicing process of the reflector,and the process was tested and verified.The results show that the number of hexagonal honeycomb core splicing is generally 3 or 6 times,which is beneficial to symmetrical honeycomb structure,lattice regularly and reduction of the uneven distribution of in-plane stiffness,and improvement of the surface accuracy of reflector.J-310A film can be used as the first choice for the honeycomb splicing adhesive of high-precision reflector because of its convenient construction,the thin thickness after curing,which can greatly reduces the effects of expansion mismatch and sudden change of stiffness of different materials and be beneficial to improve the accuracy of the reflector profile.The pre-pressurization of the fixed clamp and the co-curing with the reflector can be used as the current optimal splicing process.The method is simple and low-cost.The 1.8 m diameter reflector prepared by the improved honeycomb splicing process has a profile accuracy of RMS=53 μm,which is 25 μm higher than the traditional process and meets the design requirements.The experimental results show that the reasonable splicing method of honeycomb can effectively avoid the influence of foam rubber and honeycomb expansion mismatch,reduce the influence of the agglomerate adhesive and honeycomb stiffness abrupt change,improve the symmetry of honeycomb structure and the accuracy of reflector profile greatly.The use of this process to splicing honeycombs can also effectively reduce the amount of glue used and reduce the structural quality of the product.
Key words:  Reflector  Honeycomb splicing  Process method  Surface accuracy