scholarly journals Electromagnetic Sheet Forming by Uniform Pressure Using Flat Spiral Coil

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1963 ◽  
Author(s):  
Xiaohui Cui ◽  
Dongyang Qiu ◽  
Lina Jiang ◽  
Hailiang Yu ◽  
Zhihao Du ◽  
...  
Keyword(s):  
Service Life ◽  
Magnetic Force ◽  
Electromagnetic Forming ◽  
Force Distribution ◽  
Manufacturing Cost ◽  
Main Process ◽  
Uniform Pressure ◽  
Spiral Coil ◽  
Uniform Pressure Coil ◽  
Simulation Results

The coil is the most important component in electromagnetic forming. Two important questions in electromagnetic forming are how to obtain the desired magnetic force distribution on the sheet and increase the service life of the coil. A uniform pressure coil is widely used in sheet embossing, bulging, and welding. However, the coil is easy to break, and the manufacturing process is complex. In this paper, a new uniform-pressure coil with a planar structure was designed. A three-dimensional (3D) finite element model was established to analyze the effect of the main process parameters on magnetic force distribution. By comparing the experimental results, it was found that the simulation results have a higher analysis precision. Based on the simulation results, the resistivity of the die, spacing between the left and right parts of the coil, relative position between coil and sheet, and sheet width significantly affect the distribution of magnetic force. Compared with the structure and magnetic force on a traditional uniform pressure coil, the planar uniform pressure coil can produce a uniform magnetic force distribution on the sheet, reduce the manufacturing difficulty, reduce manufacturing cost, and enhance the service life for the coil.

Dual Electromagnetic Forming Using Single Uniform Pressure Coil

2014 ◽  
Vol 611-612 ◽  
pp. 723-730
Author(s):  
Chandrahas Patel ◽  
Sachin D. Kore
Keyword(s):  
High Speed ◽  
Bottom Layer ◽  
Electromagnetic Forming ◽  
Uniform Pressure ◽  
Forming Process ◽  
Electrically Conductive ◽  
Maximum Deformation ◽  
Uniform Pressure Coil ◽  
High Speed Forming ◽  
Sheet Metal Workpiece

Electromagnetic Forming (EMF) is a high-speed forming process that can be applied for shaping, joining and cutting of workpieces made of electrically conductive material eg. aluminium. This paper proposes a dual electromagnetic forming method. Energy efficiency of the dual electromagnetic forming is compared with the single sided electromagnetic forming using FEM simulations. In uniform pressure rectangular coil, the top layer of the coil assists in the deformation of the workpiece while the bottom layer hinders the workpiece deformation.To make the bottom layer of the coil also to assist in the deformation of the workpiece, a uniform pressure rectangular coil is designed and placed between the two sheet metal workpiece. The efficiency of the two processes are compared by determing the maximum deformation obtained for each case.

Coil-less electromagnetic forming process with uniform-pressure characteristics for shaping sheet metals

2021 ◽  
Vol 70 ◽  
pp. 140-151
Author(s):  
Quanliang Cao ◽  
Xian Li ◽  
Zhenhao Li ◽  
Limeng Du ◽  
Liangyu Xia ◽  
...  
Keyword(s):  
Electromagnetic Forming ◽  
Uniform Pressure ◽  
Sheet Metals ◽  
Forming Process ◽  
Pressure Characteristics

Simulation research on low frequency sound absorption of monostable metamaterials

2021 ◽  
Vol 263 (6) ◽  
pp. 648-652
Author(s):  
Tuo Xing ◽  
Xianhui Li ◽  
Xiaoling Gai ◽  
Zenong Cai ◽  
Xiwen Guan
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Theoretical Model ◽  
Finite Element Simulation ◽  
Sound Absorption ◽  
Magnetic Force ◽  
Low Frequency ◽  
Low Frequencies ◽  
Element Simulation ◽  
Simulation Results

The monostable acoustic metamaterial is realized by placing a flexible panel with a magnetic proof mass in a symmetric magnetic field. The theoretical model of monostable metamaterials has been proposed. The method of finite element simulation is used to verify the theoretical model. The magnetic force of the symmetrical magnetic field is simplified as the relationship between force and displacement, acting on the mass. The simulation results show that as the external magnetic force increases, the peak sound absorption shifts to low frequencies. The theoretical and finite element simulation results are in good agreement.

Sheet metal electromagnetic forming using a flat spiral coil: Experiments, modeling, and validation

2019 ◽  
Vol 263 ◽  
pp. 408-422 ◽  
Author(s):  
Evandro Paese ◽  
Martin Geier ◽  
Roberto P. Homrich ◽  
Pedro Rosa ◽  
Rodrigo Rossi
Keyword(s):  
Sheet Metal ◽  
Electromagnetic Forming ◽  
Spiral Coil ◽  
Flat Spiral

Design of Locomotive Intelligent Watt Hour Meter Based on STM32

2014 ◽  
Vol 672-674 ◽  
pp. 1205-1209
Author(s):  
Hui Jun Yu ◽  
Zhi Wei Zhou ◽  
Cai Biao Chen ◽  
Ju Hui Gu
Keyword(s):  
Electric Energy ◽  
Low Power Consumption ◽  
Manufacturing Cost ◽  
Main Function ◽  
Data Display ◽  
Control Module ◽  
Energy Data ◽  
Energy Metering ◽  
Communication Module ◽  
Simulation Results

The paper focuses on the locomotive intelligent watt hour meter based on STM32. By designing Intelligent watt hour meter main function, hardware architecture, and software processes to achieve energy data display, storage, and duplex communication. The hardware structure consists of main control module, electric energy metering module, communication module and other components, electric energy metering module is responsible for data acquisition, the main control module is responsible for data processing, communications module is responsible for two-way communication. Using MATLAB software to simulate the newly developed Intelligent watt hour meter,the simulation results show that, the intelligent watt hour meter has the advantages of high precision, low power consumption, fast performance, strong anti-interference ability, low manufacturing cost etc.

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