摘要: |
通过对新型轻质铝合金5B70材料制造的返回舱侧壁承力结构制造工艺进行研究,分析了薄壁件变形控制机理及产品结构特点,采用去应力热处理、切削过程内部添加支撑以及机械加工补偿等方式优化加工和工艺路线,最终完成了5B70返回舱侧壁承力结构模拟件的制造。结果表明,通过去应力热处理等多个方式对侧壁承力结构加工过程进行变形控制,有效减轻了因残余应力释放导致的产品变形问题,满足了设计技术指标要求。 |
关键词: 薄壁件;舱体结构;去应力热处理;变形控制 |
基金项目:航天航空用高性能铝锂合金及先进制备加工技术研究(遵市科合重大(2020)2号);超纯净均质细晶铝锂合金制备与加工创新技术研发及应用(黔财工(2020)284号) |
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Machining Deformation Control Technology of Large Thin-walled Aluminum Alloy Components |
Lv Zhenxing Wen Qiangmiao Zhang Tianliang Gao Liguo Bai Jingying Cui Qingxin Jiang Mingxia
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Beijing Spacecrafts Co., Ltd., Beijing 100094
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Abstract: |
In this article, the manufacturing process of a new lightweight aluminium alloy 5B70 return capsule sidewall bearing structure is investigated, the deformation control mechanism of the thin-walled part and the structural characteristics of the product have already been analysed, and the processing and process routes have been optimised by using stress relief heat treatment, adding support inside the cutting process and mechanical machining compensation, etc., finally complete the manufacture of a simulated 5B70 return capsule sidewall bearing structure. The results show that the deformation control of the sidewall bearing structure processing process through multiple methods such as stress relief heat treatment has effectively reduced the product deformation caused by residual stress release and met the design technical index requirements. |
Key words: thin-walled pars;spacecraft structure;stress relieving heat treatment;deformation control |