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| Study on Electromagnetic Force Distribution and Forming Effect of Plate Electromagnetic Forming Based on Driving Conductor Ring |
| Li Mengyao1,2, Qiu Li1,2, Ying Ningxuan1,3, He Chenjun1,4, Li Gaoning1,5 |
1. College of Electrical Engineering and New Energy China Three Gorges University Yichang 443002 China;
2. Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station Yichang 443002 China;
3. State Grid Hubei Electric Power Co. Ltd Jingmen Power Supply Company Jingmen 438000 China;
4. State Grid Hubei Electric Power Co. Ltd Xiaogan Xiaonan District Power Supply Company Xiaogan Xiaogan 432100 China;
5. State Grid Baiyin Power Supply Company Baiyin 730900 China |
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Abstract Electromagnetic forming is a kind of high-speed forming technology that uses pulsed electromagnetic force to process metal workpiece. Compared with quasi-static metal processing, electromagnetic forming technology can improve the forming limit of metal workpiece, and the forming speed of workpiece is fast and the forming quality is high. In the traditional electromagnetic forming process of plate, the force distribution can not meet the requirements of uniform deformation of plate, which leads to the conical profile of plate. Aiming at the technical defects of traditional electromagnetic forming technology of plate, this paper puts forward an electromagnetic forming technology of plate based on driving conductor ring to solve the problems of difficult adjustment of electromagnetic force and poor forming uniformity of plate. The basic principle of electromagnetic forming of plate based on driving ring is: under the action of driving coil, pulse electromagnetic force is generated in the driving ring, and the driving ring is driven by electromagnetic force to overcome inertia and accelerate to be in motion, and then the driving ring collides with the metal sheet, and the kinetic energy of the driving ring is converted into plastic strain energy required for plate deformation under the collision of the driving ring, thus completing plate forming. In this paper, AA1060 aluminum plate (the radius of aluminum plate is 70 mm, and the radius of aluminum plate forming area is 50 mm) is used, and the relationship between the material properties and geometric structure of driving ring and electromagnetic force and sheet forming effect is studied by constructing a two-dimensional simulation model of COMSOL. Firstly, in order to study the influence of driving ring material on electromagnetic force and workpiece forming effect in electromagnetic forming, this paper simulates the electrical conductivity and density of driving ring. It is proved that, under the same discharge energy, larger conductivity produces stronger electromagnetic force in the driving ring, and there is an optimal density value to maximize the bulging amount of the plate. Secondly, in order to explore the relationship between the geometric structure of driving ring and the electromagnetic forming effect of plate, this paper studies the electromagnetic distribution law of driving ring and the forming uniformity of plate under the two structural parameters of equivalent radius and section radius of driving ring. The dynamic deformation process of the plate shows that the deformation behavior of the plate after the introduction of the driving ring is more conducive to the uniform deformation of the plate. In the electromagnetic forming method of plate based on driving ring, the position where the plate collides with the driving conductor ring is deformed first, and then the driving ring drives other positions of the plate to deform gradually. In the simulation model of this paper, the uniformity of electromagnetic forming is the best when the copper drive ring with equivalent radius of 30 mm and cross-section radius of 3 mm is used, and the plate uniform forming range Dr is 52.2 mm, which is 1.61 times higher than that of traditional electromagnetic forming. Based on the simulation research, the electromagnetic forming experiment of plate based on driving ring is carried out. The uniform forming range Dr of the plate processed by copper drive ring with equivalent radius of 32 mm and cross section radius of 3 mm is 42.5 mm. Compared with the uniform forming range Dr of 44 mm obtained by simulation, the error is within the allowable range, which verifies the reliability of the electromagnetic forming simulation model based on the drive ring.
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Received: 27 December 2023
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2025, Vol. 40 
