基于双集磁器结构的管件电磁胀形研究

Research on Electromagnetic Tube Bulging Based on Double Field Shaper

针对管件端部效应导致轴向变形不均匀,制约管件电磁胀形技术发展的问题,首次提出一种基于双集磁器结构的管件电磁胀形方法。首先通过采用双集磁器结构实现对管件电磁力分布的调控,然后建立管件电磁胀形电磁-结构二维轴对称模型,最后研究分析集磁器结构对电磁力分布和管件成形均匀性的影响。仿真结果表明,基于双集磁器结构的管件电磁胀形可为管件提供"凹型"分布的径向电磁力,与传统线圈相比采用双集磁器结构时所提供的算例能够显著增大管件胀形的均匀范围,从而有效解决管件轴向变形不均匀的问题。

Targeting the problem of uneven axial deformation caused by the end effect of tube fittings and restricting the development of electromagnetic tube bulging technology,the paper proposes a method for the electromagnetic tube bulging based on double field shaper for the first time.Firstly,the electromagnetic force distribution of the tube fittings is controlled by adopting the double field shaper.Then an electromagnetic-structure two-dimensional axisymmetric model of the electromagnetic tube bulging is established.Finally,the influence of the field shaper on the electromagnetic force distribution and the uniformity of tube forming is analyzed.The simulation results show that the electromagnetic tube bulging with the double field shaper can provide the tube with the concave distribution of radial electromagnetic force.Compared with the traditional coil,the calculation example using the double field shaper can significantly increase the expansion of the tube.The uniform range of the shape can effectively solve the problem of uneven axial deformation of the tube.