Investigation of Turn Number of the Coil on Tube Forming Performance in Electromagnetic Pulse Forming
Loading...
Date
2021-10-13
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Electromagnetic pulse forming (EMPF) is an environmentally friendly and high-speed
forming method without pollution generating. As the key component for energy conversion,
the coil has a significant influence on the forming performance. Consequently, this paper
aims to study the effect of the turn number of the coil on the performance of the tube forming
through the theoretical analysis model and experiments. Based on the connection among the
electrical parameters of the coil, the current parameters of the discharge pulse, and
electromagnetic force, a theoretical model is built to analyze the qualitative connection
between the number of turns of the coil and the amount of forming. Then, the EMPF
experiments with the same discharge energy of 3.4kJ are carried out to verify the established
model through the established EMPF equipment. The experimental results are consistent
with the theoretical analysis. The results show that the peak value of the current amplitude
and rise time of the pulse decrease respectively with the increase of the number of turns of
the coil because the increments of the number of turns lead to the rising coil inductance. But
the forming amount of the tube increases first and then decreases. So there is an optimal
value of the turn number for the coil to generate the maximum Lorentz force to deform the
workpiece. Therefore, it is worthwhile to choose the proper number of coil turn to improve
the effect of EMPF.
Description
Table of contents
Keywords
magnetic pulse forming, turn number, coil