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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 6    December 2007

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Effects of coil length on tube compression in electromagnetic forming
YU Hai-ping(于海平), LI Chun-feng(李春峰)

School of Materials Science and Engineering, Harbin Institute of Technology,Harbin 150001, China

Abstract: The effects of the length of solenoid coil on tube compression in electromagnetic forming were investigated either by theory analysis or through sequential coupling numerical simulation. The details of the electromagnetic and the mechanical models in the simulation were described. The results show that the amplitude of coil current waveform and the current frequency decrease with the increase of the coil length. And the peak value of magnetic pressure is inversely proportional to the coil length. The distribution of the magnetic force acting on the tube is inhomogeneous while the tube is longer than the coil. The shortened coil length causes the increases of the maximum deformation and energy efficiency. The numerically calculated result and the experimental one of the final tube profile are in good agreement.

 

Key words: coil length; tube compression; sequential coupling simulation; inductance; electromagnetic forming

ISSN 1672-7029
CN 43-1423/U

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