放电时序对双向加载式管件电磁翻边的影响

目的 研究放电时序对翻边变形的影响规律,提高成形能力.方法 以双向加载式管件电磁翻边系统为研究对象,建立基于电路-磁场-固体力学耦合的仿真模型,针对放电时序的变化,详细分析驱动电流、电磁力和翻边变形受到的影响,揭示其作用机理.结果 与常用的同时放电相比,最佳的时序放电在保证脉冲时间一致性的同时,将径、轴向线圈电流峰值分别提高11.6％和降低12.4％,最终使径、轴向电磁力峰值分别提高18.8％和6.8％,翻边角度提升约30％,显著提升了系统的翻边能力.结论 控制放电系统开关时刻改变放电时序,可以使放电能量在线圈间发生转移,影响线圈中的驱动电流波形,从而提高电磁力大小并改善其径轴向分量的比例关系,显著增强电磁系统的成形能力.

Influence of Discharge Timing on Electromagnetic Flanging of Tube with Bidirectional Loading

In order to study the influence law of discharge time sequence on flanging deformation and improve the forming ability. In this paper, the electromagnetic flanging system of tube with bidirectional loading is taken as the research object, a simulation model based on circuit magnetic field solid mechanics coupling is established. According to the change of discharge sequence, the effects of driving current, electromagnetic force and flanging deformation are analyzed in detail, and its mechanism of action is revealed. The results show that compared with the common simultaneous discharge, the optimal sequential discharge can ensure the consistency of pulse time, increase the peak current of radial and axial coils by 11.6% and 12.4%, increase the peak electromagnetic force of radial and axial coils by 18.8% and 6.8%, and increase the flanging angle by 30%, which significantly improves the flanging ability of the system. Controlling the switching time of the discharge system and changing the discharge sequence can transfer the discharge energy between coils and affect the driving current waveform in the coil, so as to improve the magnitude of the electromagnetic force and the proportional relationship between its radial and axial components, and significantly enhance the forming ability of the electromagnetic system.