Transactions of Materials and Heat Treatment

Title：Study on stretch forming of aluminum alloy skin for aerospace

Authors： Jin Kun Sun Xiujing Yin Ping Fu Yang Sun Zhen Wang Cun Ma Chao Mao Aiqun

Unit： China Academy of Launch Vehicle Technology

KeyWords： aluminum alloy 2A14 stretch-forming skin mechanical property

ClassificationCode：V46

year,vol(issue):pagenumber：2015,40(8):47-51

Abstract：

Skin stretch-forming process of aluminum alloy 2A14 was studied by FET-1000T transverse skin stretch forming equipment. The results show that the main method on forming of the single curvature skin part is first pre-stretched forming, then bending and post-stretched forming. The pre-stretching is to ensure the flat state of the material, and post-stretching can reduce the springback of skin. Through pre-stretching, the straightness of skin is within the range of 0.9 to 1.2 mm, the thickness is within the range of 8.03 to 8.10 mm; the straightness of skin is low on the center of the skin, while high in both ends of the skin; the thickness of skin is thick on the center, while thin in both ends. An appropriate increase of the amount (≈0.6%) in complementary stretching can enhance the skin profile accuracy, ensure the mechanical property, and achieve cooperative control on the skin shape and property.

Funds：

航天科技集团重大工艺项目子课题（ZDGY2013-03）

晋坤（1987-），男，硕士，助理工程师

Reference：

[1]王俊彪. 材料的先进成形技术[M]. 北京: 高等教育出版社, 2002. Wang J B. Advanced Forming Technology of Materials [M]. Beijing: Higher Education Press, 2002.

[2]王晓林，周贤宾，李晓星. 飞机蒙皮拉形过程的有限元数值模拟[J]. 航空制造技术, 2002, (2):39-42.Wang X L, Zhou X B, Li X X. Finite element numerical simulation of stretch forming processes of aircraft skin[J]. Aeronautical Manufacturing Technology, 2002, (2):39-42.

[3]伍惠. 双曲度镜面蒙皮的成形工艺[J]. 航空制造技术, 2003, (3): 55-57. Wu H. Stretch forming processes of double curved mirror skin[J]. Aeronautical Manufacturing Technology, 2003, (3): 55-57.

[4]张彦敏, 周贤宾. 飞机蒙皮拉伸成形工艺参数优化[J]. 航空学报, 2006, 27(6): 1203-1208. Zhang Y M, Zhou X B. Parameter optimization in aircraft skin stretch forming process[J]. Acta Aeronautica Et Astronautica Sinica, 2006, 27(6): 1203-1208.

[5]王丽丽, 李东升, 曹珺雯, 等. 可重构柔性模具蒙皮包覆拉形仿真系统开发[J]. 锻压技术, 2009, 34(2): 141-145. Wang L L, Li D S, Cao J W, et al. Development of forming simulation system for sheet draping over reconfigurable compliant tooling[J]. Forging & Stamping Technology, 2009, 34(2): 141-145.

[6]周朝晖, 蔡中义, 李明哲. 多点模具拉形中回弹的数值分析[J]. 锻压技术, 2006, 31(2): 94-97. Zhou C H, Cai Z Y, Li M Z. Numerical analysis of the springback in stretching of sheet metal based on multi-point die[J]. Forging & Stamping Technology, 2006, 31(2): 94-97.

[7]李荣, 孙志莹, 郎利辉. 机身大型蒙皮件拉形新工艺可行性研究[J]. 锻压技术, 2014, 39(10): 47-51.Li R, Sun Z Y, Lang L H. Feasibility study on the new technology of large skin stretch forming[J]. Forging & Stamping Technology, 2014, 39(10): 47-51.

[8]袁鸿. 软件移植关键技术研究及拉形成形仿真[D]. 南京: 南京航空航天大学, 2004.Yuan H. Research on Key Techniques of Software Transplantation and Simulation of Stretch Forming[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2004.

[9]彭赫力, 李明哲, 李中权, 等. 柔性夹钳多点拉形压痕的数值模拟[J]. 锻压技术, 2014, 39(12): 22-26. Peng H L, Li M Z, Li Z Q, et al. Numerical simulation of dimple in flexible clamp multi-point stretch forming[J]. Forging & Stamping Technology, 2014, 39(12): 22-26.

[10]彭赫力, 李明哲, 赵毕艳, 等. 柔性夹钳拉形力加载与位移加载的数值模拟[J]. 锻压技术, 2014, 39(9): 127-130. Peng H L, Li M Z, Zhao B Y, et al. Numerical simulation of load force and load displacement in flexible clamp stretch forming[J]. Forging & Stamping Technology, 2014, 39(9): 127-130.

[11]谭喜平, 宋东福, 郑开宏, 等. 机械振动对再生铝合金组织和力学性能的影响[J]. 稀有金属, 2014, 38(2): 185-192.Tan X P, Song D F , Zheng K H, et al. Microstructure and mechanical properties of aluminum alloy recycled by cast with mechanical vibration[J]. Chinese Journal of Rare Metals, 2014, 38(2): 185-192.

[12]孙美娜, 王快社, 徐瑞琦, 等. 搅拌摩擦加工超细晶2024铝合金热稳定性研究[J]. 稀有金属, 2014, 38(5): 780-785.Sun M N, Wang K S, Xu R Q, et al. Thermal stability of ultra-fine grained 2024 aluminum alloy prepared by friction stir processing[J]. Chinese Journal of Rare Metals, 2014, 38(5): 780-785.

Service：

【This site has not yet opened Download Service】【Add Favorite】