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| New Development of Electromagnetic Pulse Forming Technology and Its Application in Aircraft Skin Parts Manufacturing |
| CUI XiaoHui 1,2,3, ZHOU Xianglong 1 , DU Zhihao 2 , YU Hailiang 1,2,3, CHEN Baoguo4 |
| (1. Light Alloy Research Institute, Central South University, Changsha 410083, China; 2. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China; 3. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China; 4. COMAC Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China) |
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Abstract Electromagnetic pulse forming (EMF) is a method of high-speed machining method for metal workpieces by using pulsed magnetic force. Compared with traditional processes, EMF can increase the forming limit of difficult-to-deform materials and reduce springback. Thus, it provides an effective solution to the difficult processing problem of aluminum alloy. Based on the difficult forming problems of cylindrical parts drawing, large ellipsoidal parts manufacturing, V-shaped part bending and springback control, we introduce some new technologies such as multi-directional magnetic force driving materials, magnetic field force partition loading, and high frequency oscillation effect. On this basis, the method of shaping the aircraft skin parts by magnetic field force partition loading is proposed. Experimental and simulation results show that the sheet undergoes mainly elastically deformed and results in a large springback after pure stretching. However, the elastic deformation on the sheet is transformed into plastic deformation, and the springback is greatly reduced after EMF.
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2020, 
