Dynamic Process Analysis and Optimization of Forming Effects in Lorentz Force Stamping for Polygonal Sheet Metal
Xiong Qi1,2, Chen Kaichuang1,3, Ma Chaojie1,3, Wang Yizhe1,3, Yan Nuo1,3
1. College of Electrical Engineering & New Energy China Three Gorges University Yichang 443002 China; 2. Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China; 3. Hubei Provincial Engineering Research Center of Intelligent Energy Technology China Three Gorges University Yichang 443002 China
Abstract：Comparison with the conventional quasi-static stamping technology, the utilization of Lorentz force-driven stamping technology has the potential to significantly enhance the forming limit of sheet metal. Nevertheless, the extant research merely corroborated the viability of this approach, yet did not investigate the ultimate forming quality, which is challenging to align with the diverse requirements of the industry. Consequently, a Lorentz force stamping scheme for polygonal sheet metal is put forth in this paper. A finite element model is constructed to examine the dynamic process and forming effect, and the forming effect is optimized. Firstly, the basic model of the stamping system is established, and the most important parts of the system driver and punch are designed, and the circuit with continuous flow circuit is used to generate repulsive force to drive the forming. Secondly, because the forming process is very fast, a simulation model must le established to study the forming dynamic process and the final forming effect in detail. Finally, a fully coupled electromagnetic and mechanical field model is established to verify the feasibility of the proposed scheme. The simulation results demonstrate that the forming process of this scheme can be divided into three distinct stages: the acceleration stage, the inertia stage, and the rebound stage. The maximum forming depth achieved was 35.00 mm, with the plate exhibiting smooth sticking. The equivalent strain level was low, with a maximum thinning rate of 20.13%. The shaped plate exhibited an effective forming effect. The maximum thinning rate was optimized by manipulating the holding force, friction coefficient and discharge voltage. The maximum thinning rate was reduced to 8.31% under the optimal parameter combination. The conclusions are as follows: (1) The scheme is capable of forming polygonal sheet metal at a significantly higher speed than the traditional quasi-static forming method, while also enhancing the forming limits of sheet metal. The final forming effect is satisfactory. (2) The method exhibits characteristics of both electromagnetic forming and traditional quasi-static forming. The forming process is completed within 2.50 ms, which is a relatively short time. The forming dynamic process is divided into three stages according to the speed change of the driving device: accelerating dynamic stage, inertia stage and rebound stage. The principal forming stage is the inertial movement stage, which ensures the subsequent forming effect. (3) The friction coefficient, the blank holding force, and the discharge voltage have been selected to further optimize the maximum thinning rate. Following the optimization process, the optimal parameter combination was identified as a friction coefficient of 0.171, a blank holding force of 81.95 kN, and a discharge voltage of 11.74 kV for the drive circuit. At this juncture, the maximum thinning rate of the plate is 8.31%, which represents a 58.71% increase over the preceding baseline.
熊奇, 陈开创, 马朝杰, 王毅哲, 阎诺. 多边形金属板件洛伦兹力驱动冲压成形动态过程分析及成形效果优化[J]. 电工技术学报, 2025, 40(7): 2007-2019.
Xiong Qi, Chen Kaichuang, Ma Chaojie, Wang Yizhe, Yan Nuo. Dynamic Process Analysis and Optimization of Forming Effects in Lorentz Force Stamping for Polygonal Sheet Metal. Transactions of China Electrotechnical Society, 2025, 40(7): 2007-2019.
[1] Cao Quanliang, Du Limeng, Li Zhenhao, et al.Investigation of the Lorentz-force-driven sheet metal stamping process for cylindrical cup forming[J]. Journal of Materials Processing Technology, 2019, 271: 532-541. [2] Ghosh S K.Principally on sheet metal forming defects as described in the eleventh biennial congress of the international deep drawing research group (IDDRG)[J]. International Journal of Mechanical Sciences, 1981, 23(4): 195-211. [3] Balanethiram V S, Daehn G S.Hyperplasticity: increased forming limits a high workpiece velocity[J]. Scripta Metallurgica et Materialia, 1994, 30(4): 515-520. [4] 熊奇, 邱爽, 李彦昕, 等. 组合式电磁成形技术研究进展[J]. 电工技术学报, 2024, 39(9): 2710-2729. Xiong Qi, Qiu Shuang, Li Yanxin, et al.Research progress of combined electromagnetic forming technology[J]. Transactions of China Electrotechnical Society, 2024, 39(9): 2710-2729. [5] 熊奇, 朱鑫辉, 赵翔, 等. AZ31镁合金管件电磁吸引式成形动态特性研究[J]. 电工技术学报, 2023, 38(10): 2577-2588, 2636. Xiong Qi, Zhu Xinhui, Zhao Xiang, et al.Research of dynamic characteristics in electromagnetic attraction forming of AZ31 magnesium alloy tube[J]. Tran-sactions of China Electrotechnical Society, 2023, 38(10): 2577-2588, 2636. [6] Dong Pengxin, Li Zhangzhe, Feng Sheng, et al.Fabrication of titanium bipolar plates for proton exchange membrane fuel cells by uniform pressure electromagnetic forming[J]. International journal of hydrogen energy, 2021, 46(78): 38768-38781. [7] 邱立, 李彦涛, 苏攀, 等. 电磁成形中电磁技术问题研究进展[J]. 电工技术学报, 2019, 34(11): 2247-2259. Qiu Li, Li Yantao, Su Pan, et al.Research on electromagnetic problems in electromagnetic forming process[J]. Transactions of China Electro-technical Society, 2019, 34(11): 2247-2259. [8] 熊奇, 杨猛, 周丽君, 等. 双线圈吸引式板件电磁成形过程中的涡流竞争问题[J]. 电工技术学报, 2021, 36(10): 2007-2017. Xiong Qi, Yang Meng, Zhou Lijun, et al.Eddy current competition in electromagnetic forming process of double coil suction plate[J]. Transactions of China Electrotechnical Society, 2021, 36(10): 2007-2017. [9] Wu Zelin, Cao Quanliang, Fu Junyu, et al.An inner-field uniform pressure actuator with high performance and its application to titanium bipolar plate forming[J]. International Journal of Machine Tools and Manufacture, 2020, 155: 103570. [10] 邵子豪, 吴伟业, 汪晨鑫, 等. 基于双层凹型集磁器的管件电磁胀形电磁力特性及变形行为研究[J]. 电工技术学报, 2024, 39(5): 1245-1255. Shao Zihao, Wu Weiye, Wang Chenxin, et al.Electromagnetic force and formability analysis of tube electromagnetic bulging based on double-layer concave magnetic field shaper[J]. Transactions of China Electrotechnical Society, 2024, 39(5): 1245-1255. [11] Lai Zhipeng, Han Xiaotao, Cao Quanliang, et al.The electromagnetic flanging of a large-scale sheet workpiece[J]. IEEE Transactions on applied superco-nductivity, 2013, 24(3): 1-5. [12] Xiong Qi, Cao Quanliang, Han Xiaotao, et al.Axially movable electromagnetic forming system for large-scale metallic sheet[J]. IEEE Transactions on Applied Superconductivity, 2016, 26(4): 1-4. [13] Feng Fei, Li Jianjun, Huang Liang, et al.Formability enhancement of 5052 aluminium alloy sheet in electromagnetic impaction forming[J]. The International Journal of Advanced Manufacturing Technology, 2021, 112: 2639-2655. [14] Taber G A, Kabert B A, Washburn A T, et al.An electromagnetically driven metalworking press[C]// Proceedings of the 5th International Conference on High Speed Forming, Dortmund, Germany, 2012: 125-134. [15] Fang Jinxiu, Mo Jianhua, Li Jianjun.Microstructure difference of 5052 aluminum alloys under conventional drawing and electromagnetic pulse assisted incremental drawing[J]. Materials Characterization, 2017, 129: 88-97. [16] Shang Jianhui, Daehn G.Electromagnetically assisted sheet metal stamping[J]. Journal of Materials Processing Technology, 2011, 211(5): 868-874. [17] Desai S V, Kumar S, Satyamurthy P, et al.improvement of performance of electromagnetic welding process by use of driver materials[J]. International Journal of Applied Electromagnetics and Mechanics, 2011, 35(2): 113-121. [18] Cao Quanliang, Han Xiaotao, Lai Zhipeng, et al.Analysis and reduction of coil temperature rise in electromagnetic forming[J]. Journal of Materials Processing Technology, 2015, 225: 185-194. [19] 张骁. 脉冲强磁场作用下管件胀拉成形数值模拟与实验研究[D]. 武汉: 华中科技大学, 2017. Zhang Xiao.Numerical simulation and experimental study of bulging drawing forming under pulsed high magnetic fields[D]. Wuhan: Huazhong University of Science and Technology, 2017. [20] Du Limeng, Li Xian, Xia Liangyu, et al.Numerical and experimental verification of an iterative coupling method for analyzing the Lorentz-force-driven sheet metal stamping process[J]. The International Journal of Advanced Manufacturing Technology, 2021, 115(7): 2161-2173. [21] 刘晓杰, 金康宁, 单斌, 等. 织构化冲压模具的应力数值模拟分析[J]. 表面技术, 2019, 48(8): 9-15. Liu Xiaojie, Jin Kangning, Shan Bin, et al.Numerical simulation analysis of stress in textured stamping die[J]. Surface Technology, 2019, 48(8): 9-15 [22] Xie Jianfeng, Zhang Shaozhe, Shi Jiangtao, et al.Realization of the reconfigurable pulsed high magnetic field facility and its scientific application at Wuhan National Pulsed High Magnetic Field Centre[J]. High Voltage, 2023, 8(5): 898-906. [23] 陈盟. 基于轴-径双向脉冲洛伦兹力加载的铝合金筒形件变形行为及其控制研究[D]. 武汉: 华中科技大学, 2020. Chen Meng.Research on deformation behavior and control strategy of aluminum cylindrical parts under axial-radial pulsed Lorentz forces[D]. Wuhan: Hua-zhong University of Science and Technology, 2020. [24] 刘俭辉, 赵贺, 冉勇, 等. 基于临界面理论的多轴等效应变疲劳寿命预估模型[J]. 中国机械工程, 2022, 33(15): 1821-1827. Liu Jianhui, Zhao He, Ran Yong, et al.Multiaxial equivalent strain fatigue life prediction model based on critical plane theory[J]. China Mechanical Engineering, 2022, 33(15): 1821-1827. [25] 王涌纲, 何仕荣, 顾猛, 等. 金属双极板冲压成形数值分析及回弹补偿[J]. 塑性工程学报, 2024, 31(2): 43-50. Wang Yonggang, He Shirong, Gu Meng, et al.Numerical analysis and springback compensation of metal bipolar plate stamping forming[J]. Journal of Plasticity Engineering, 2019, 31(2): 43-50. [26] 陈一哲, 范宏德, 王祎纯, 等. 车用纤维金属层板构件冲压变形行为研究[J]. 汽车工程, 2023, 45(3): 517-525. Chen Yizhe, Fan Hongde, Wang Yichun, et al.Research on stamping deformation behavior of automotive fiber metal laminates[J]. Automotive Engineering, 2023, 45(3): 517-525. [27] 秦泗吉, 李学洋, 潘自给, 等. 压边力控制技术研究现状[J]. 塑性工程学报, 2022, 29(10): 1-11. Qin Siji, Li Xueyang, Pan Zizi, et al.Research status of crimping force control technology[J]. Journal of Plasticity Engineering, 2022, 29(10): 1-11. [28] 李奇涵, 邢继刚, 高嵩, 等. 5052铝合金方盒件冲压成形变压边力技术[J]. 锻压技术, 2020, 45(9): 51-56. Li Qihan, Xing Jigang, Gao Song, et al.Deformation holding force technology of 5052 aluminum alloy square box parts[J]. Forging Technology, 2020, 45(9): 51-56. [29] 刘强, 俞国燕, 梅端. 基于Dynaform与RBF-NSGA-II算法的冲压成形工艺参数多目标优化[J]. 塑性工程学报, 2020, 27(3): 16-25. Liu Qiang, Yu Guoyan, Mei Duan.Multi-objective optimization of stamping process parameters based on dynaform and RBF-NSGA-II algorithm[J]. Journal of Plasticity Engineering, 2019, 27(3): 16-25.
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