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神舟飞船防热大底钻孔工艺技术研究
万青,郑京华,孙波,李哲
航天材料及工艺研究所,北京 100076
摘要:
神舟飞船防热大底主要为玻璃钢蜂窝夹层结构,制孔时在较大装夹力下容易产生弹性变形。针对装夹变形导致孔位置精度难以保证的问题进行工艺优化改进,对工装结构、装夹方式、工艺流程及钻孔设备进行了优化。改进工艺试验结果显示采取低应力装夹方式、减少翻转次数、使用数控加工设备等措施能有效提高钻孔精度。
关键词:  防热大底 蜂窝夹层结构 钻孔 位置度
DOI:10.12044/j.issn.1007-2330.XXXX.XX.001
分类号:TB332
基金项目:
Drilling Technology Research of Heatshield of Shenzhou Spacecraft
WAN Qing, ZHENG Jinghua, SUN Bo, LI Zhe
Aerospace Research Institule of Materials & Processing Technology Beijing 100076
Abstract:
The heatshield of ShenZhou spacecraft is mainly composed of FRP honeycomb sandwich structure. Aiming at the problem that the hole position accuracy is difficult to guarantee due to the clamping deformation, the process optimization and improvement are carried out. The tooling structure, clamping method, process flow and drilling equipment are improved. The test results show that the drilling accuracy can be effectively improved by adopting the low stress clamping method, reducing the turnover times and using the numerical control processing equipment.
Key words:  Heatshield of Shenzhou, Honeycomb sandwich structure, Drilling, Position accuracy