摘要
为了提高小孔翻边效率,提出了带集磁器的电磁翻边成形方法。采用ANSYS软件建立了多物理场耦合有限元模型,分析了集磁器结构对板料磁场力分布和板料翻边变形均匀性的影响规律。研究发现:传统单缝集磁器的缝隙所对应板料电磁力小,最终缝隙对应的板料变形量小,板料整体变形均匀性差。当采用4缝集磁器时,多缝隙使板料电磁力分布均匀性提高。采用有限元软件优化设计了4缝集磁器的短缝尺寸。加工了4缝集磁器结构,并进行了磁脉冲成形实验。模拟结果表明,单缝集磁器板料最大贴模间隙为2.65 mm,而4缝隙的最大贴模间隙为0.22 mm。模拟结果与实验结果的相对误差小于4%。
To improve the efficiency of hole flanging,a method of electromagnetic flanging with field shaper was proposed.A multi-physical coupling finite element model was established using ANSYS software,and the effect of field shaper structure on magnetic field force distribution and flanging deformation uniformity of sheet metal was analyzed.It is found that the electromagnetic force corresponding to the slit of the traditional single-slit field shaper is small,and the deformation depth is small,the overall deformation uniformity of the sheet metal is poor.When the four-slit field shaper is used,the distribution uniformity of electromagnetic force on sheet metal is improved because of multi-slit.The short slit size of the four-slit filed shaper was optimized by finite element software.Then the structure of the fourslit field shaper was machined,and the magnetic pulse forming experiment was carried out.The simulation results show that the maximum die fitting gap of single-slit field shaper plate is 2.65 mm,while the maximum die fitting gap of four-slit field shaper is 0.22 mm.The relative error between simulation results and experiment results is less than 4%.
作者
崔晓辉
邱东阳
颜子钦
杜志浩
CUI Xiao-hui;QIU Dong-yang;YAN Zi-qin;DU Zhi-hao(State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;Light Alloy Research Institute,Central South University,Changsha 410083,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第5期44-52,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51775563,51405173)。
关键词
电磁翻边成形
磁场力
翻边
集磁器
有限元仿真
electromagnetic flanging forming
magnetic field force
flanging
field shaper
finite element simulation
