Transactions of Materials and Heat Treatment

Title：Research on sheet structural design and deformation law for electromagnetic oblique hole flanging

Authors： Cui Xiaohui1 2 Zhang Lei3 Chen Hao3 Yan Ziqin3 Yang Guang1 Wang Hanpeng1

Unit： 1. Light Alloy Research Institute Central South University 2. State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South University 3. College of Mechanical and Electrical Engineering Central South University

KeyWords： electromagnetic forming oblique hole flanging flanging height sheet thickness flanging fillet radius

ClassificationCode：TG391

year,vol(issue):pagenumber：2023,48(5):168-175

Abstract：

Oblique hole flanging is widely used in the bottom of carrier rocket fuel tank, but there are some problems such as cracked flanging, uneven height and multiple sets of complicated tooling in the existing technology. Therefore, utilizing the advantages of single die and improving the material forming limit of electromagnetic forming, the high precision oblique flanging hole was formed by a single set of tooling and coils in one electric discharge. The results show that the calculation formula of flanging height in different areas of sheet metal is established by theoretical analysis, and the height difference of oblique hole flanging is related to sheet metal thickness t0 and flanging fillet radius r. Using finite element simulation to optimize the offset of elliptic hole center, it is find that with the increasing of offset, the flanging height difference of sheet metal decreases first and then increases, and when the offset is 5 mm, the maximum height difference is 0.20 mm after sheet metal oblique hole flanging. In the process of electromagnetic forming, the acute-angled side deforms before the obtuse-angled side, and the inertia effect leads eventual fitness to die of the part. At the discharge voltage of 10 kV, the maximum fit gap between sheet metal and die is 0.25 mm, and the error between the finite element simulation and the experiment results is less than 5%.

Funds：

国家自然科学基金资助项目(52275394)；中南大学高性能复杂制造国家重点实验室开放课题研究基金资助项目（ZZYJKT2020-02）

作者简介：崔晓辉（1984-），男，博士，副教授,E-mail：cuixh622@csu.edu.cn

Reference：

[1]张文忠，陈浩，董占国，等. 基于磁脉冲技术的铝合金板材圆孔翻边工艺研究[J]. 航天制造技术，2009，(4)：5-7，16.

Zhang W Z，Chen H，Dong Z G，et al.Research on formability of aluminum alloy flanged hole by EMF[J].Aerospace Manufacturing Technology，2009，(4): 5-7，16.

[2]王煜，张松，龚雄，等. 电磁脉冲成形技术在铝合金壁板翻边孔上的应用与研究[J]. 制造业自动化，2021，43(1)：1-3,11.

Wang Y, Zhang S, Gong X, et al. Application and research of electromagnetic pulse formingused on flanging hole of aluminum alloy panels [J]. Manufacturing Automation, 2021，43(1)：1-3,11.

[3]谢冰鑫，黄亮，黄攀，等. 铝合金板料电磁翻边全流程工艺研究[J]. 中国机械工程，2021，32(2)：220-226.

Xie B X, Huang L, Huang P, et al. Research on whole process route of electromagnetic flanging ofaluminum alloy sheets[J]. China Mechanical Engineering,2021, 32(2)：220-226.

[4]张下陆，郭慧，赵鸿飞，等. 淬火态2219铝合金板材加热翻边工艺[J]. 锻压技术，2021，46(10)：136-140.

Zhang X L, Guo H, Zhao H F, et al. Heating flanging process for quenched state 2219 aluminum alloy sheets[J]. Forming ＆ Stamping Technology, 2021，46(10)：136-140.

[5]Psyk V, Risch D, Kinsey B L, et al. Electromagnetic forming-A review[J]. Journal of Materials Processing Technology, 2011,211(5):787-829.

[6]Yu H P, Zheng Q L, Wang S L, et al. The deformation mechanism of circular hole flanging by magnetic pulse forming[J]. Journal of Materials Processing Technology, 2018, 257:54-64.

[7]Imbert J, Worswick M. Reduction of a pre-formed radius in aluminium sheet using electromagnetic and conventional forming[J]. Journal of Materials Processing Technology, 2012，212 (9):1963-1972.

[8]Xiao A, Huang C Q, Yan Z Q, et al. Improved forming capability of 7075 aluminum alloy using electrically assisted electromagnetic forming[J]. Materials Characterization， 2022，183: 111615.

[9]Ma H J, Huang L, Wu M Q, et al. Dynamic ductility and fragmentation for aluminum alloy using electromagnetic ring expansion[J]. Procedia Engineering, 2014，81:787-792.

[10]Yan Z Q, Xiao A, Zhao P, et al. Deformation behavior of 5052 aluminum alloy sheets during electromagnetic hydraulic forming[J]. International Journal of Machine Tools and Manufacture 2022，179:103916.

[11]Su H L, Huang L, Li J J, et al. Investigation on the forming process and the shape control in electromagnetic flanging of aluminum alloy[J]. Procedia Engineering, 2017， 207:335-340.

[12]Yan Z Q, Lin L, Chen Y, et al. Electromagnetic flanging using a field shaper with multiple seams[J]. The International Journal of Advanced Manufacturing Technology, 2022，120:1747-1763.

[13]Zhang L, Cui X H, Deng Q, et al. Comparison of the deformation behavior of circular hole-flanging obtained by electromagnetic forming and stamping[J]. The International Journal of Advanced Manufacturing Technology，2022,121(1-2)：171-183.

[14]邱立，刘洪池，姜晨非，等. 双板件电磁翻边成形效率研究[J]. 锻压技术，2022，47(5)：96-102.

Qiu L, Liu H C, Jiang C F, et al. Study on forming efficiency of electromagnetic flanging for double-sheet[J]. Forming ＆ Stamping Technology, 2022，47(5)：96-102.

[15]Su H L, Huang L, Li J J, et al. Two-step electromagnetic forming: A new forming approach to local features of large-size sheet metal parts[J]. International Journal of Machine Tools and Manufacture,2018，124:99-116.

[16]苏海. 5A02铝合金板材磁脉冲成形极限及单向拉伸变形行为研究[D]. 哈尔滨：哈尔滨工业大学，2013.

Su H. Research on the FLD and Uniaxial Tensile Behaviour of 5A02 Aluminium Alloy Sheet in the Electromagnetic Pulse Forming [D]. Harbin: Harbin Institute of Technology， 2013.

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