ABSTRACT

Coil is an important part of an electromagnetic forming system. Its design depends on the shape of the workpiece and its application. In the present work, effect of various parameters of coil design like inner diameter (ID), outer diameter (OD), effective number of turns (η), and cable connection on performance of coil have been established. Its performance have been quantified in terms of change in inductance, resistance, and subsequently on the current pulse and deformation of tube. The variation of inductance and resistance of the coil with respect to change in ID, OD, η, and cable connection have been determined experimentally and analyzed. The performance of the coil is also correlated in terms of theoretically and experimentally determined current pulse and its effect on overall inductance of the system. Further, Q-factor of the coil have been determined and analyzed to establish the loss in the coil. Small change in diameter and effective number of turns can change the amplitude of current pulse by 30 kA approximately. Additional parallel discharge cable can improve current and frequency by approximately 26% and 23%, respectively. The established performance of the coils have been experimentally and numerically validated by deforming an aluminum AA 6061 tube.

摘要

线圈是电磁成型系统的重要组成部分。其设计取决于工件的形状及其应用。在目前的工作中，已经确定了线圈设计的各种参数，如内径 (ID)、外径 (OD)、有效匝数 (η) 和电缆连接对线圈性能的影响。其性能已根据电感、电阻的变化以及随后的电流脉冲和管的变形进行量化。已经通过实验确定并分析了线圈的电感和电阻相对于 ID、OD、η 和电缆连接变化的变化。线圈的性能也与理论和实验确定的电流脉冲及其对系统整体电感的影响相关。更远，已确定并分析线圈的 Q 因子以确定线圈中的损耗。直径和有效匝数的微小变化可使电流脉冲的幅值变化约30 kA。额外的并联放电电缆可以将电流和频率分别提高约 26% 和 23%。线圈的既定性能已通过变形 AA 6061 铝管进行了实验和数值验证。