板件与管件同时加工的电磁成形能量利用率研究

Study on energy using efficiency of electromagnetic forming for simultaneous machining of plate and tube

为了提高电磁成形能量利用率,提出了一种使用单驱动线圈实现板件和管件同时加工的电磁成形方法。根据电磁成形的原理和能量转换规律,提出了一种新的双板-管电磁胀形模型,与传统单板件电磁胀形模型和传统单管件电磁胀形模型进行对比。分析了工件的磁通密度分布、电磁力分布和能量利用率,研究了驱动线圈电流的等效脉冲宽度对电磁成形能量利用率的影响。结果表明,在相同的系统放电参数下,传统单板件电磁胀形最佳能量利用率为5.05%,传统单管件电磁胀形的最佳能量利用率为9.80%,而同时实现板件与管件加工的双板-管电磁胀形的最佳能量利用率为11.85%。显然,双板-管电磁胀形技术能够在一定程度上改善电磁成形能量利用率低下的问题,且可以同时成形板件与管件。

To improve the energy using efficiency of electromagnetic forming, an electromagnetic forming method which uses single drive coil to process plate parts and tube parts simultaneously was presented. According to the principle and energy conversion law of electromagnetic forming, a new electromagnetic bulging model of double plate-tube was proposed, which was compared with the traditional electromagnetic bulging model of single plate parts and single tube parts. The magnetic flux density distribution, electromagnetic force distribution and energy using efficiency of the workpiece were analyzed, and the effect of the equivalent pulse width of the driving coil current on the energy using efficiency of the electromagnetic forming was studied. The results show that with the same discharge parameters of the system, the optimal energy using efficiency of the traditional single plate parts electromagnetic bulging is 5.05%, the optimal energy using efficiency of the traditional single tube parts electromagnetic bulging is 9.80%, and the optimal energy using efficiency of the double plate-tube electromagnetic bulging is 11.85%. Obviously, the double plate-tube electromagnetic bulging technology can improve the low utilization rate of electromagnetic forming energy to a certain extent, and can form plate and tube parts at the same time.