锻压技术

航天用铝合金蒙皮拉形工艺研究

英文标题：Study on stretch forming of aluminum alloy skin for aerospace

作者：晋坤孙秀京尹苹付杨孙震王存马超毛爱群

关键词：2A14铝合金拉形工艺蒙皮力学性能

分类号：V46

出版年,卷(期):页码：2015,40(8):47-51

摘要：

采用FET-1000T横向蒙皮拉伸成形机设备对2A14铝合金进行了蒙皮拉形工艺的研究。研究结果表明：对于单曲率蒙皮零件的成形，主要采用先预拉伸再弯曲成形后补拉伸的拉形工艺，预拉伸主要是保证成形前坯料的平直，补拉伸是为了减少零件弯曲成形后的回弹；经过预拉伸处理的蒙皮，母线直线度在0.9~1.2 mm之间，厚度在8.03~8.10 mm之间，其成形后的母线直线度大致呈现中间低两边高的现象，而厚度分布则呈现中间厚两边薄的趋势；适当的增加约0.6%的补拉伸量，既可以提高蒙皮的型面贴合度，又可以保证蒙皮的力学性能，从而达到蒙皮零件成形/成性的协同控制。

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.

基金项目：

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

参考文献：

[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.

服务与反馈：

【文章下载】【加入收藏】