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基于ANSYS多物理场耦合模块,采用松散耦合法,建立了推进剂贮箱零件侧翻孔电磁成形的有限元模型,揭示了坯料电磁力、应力、应变和厚度等的分布规律及其随时间变化规律,并优化了放电电压和成形线圈内径等工艺参数。分析结果表明:坯料在圆角区域应力和应变较大,且厚度减薄量较大;坯料圆角处残余应力较大。放电电压增大,坯料变形量增加,但厚度减薄量相应增加;线圈内径增大,坯料与模具最大间隙、最大夹角以及坯料最小厚度均先减小后增大。得到的放电电压和成形线圈内径优化值分别为40 kV和40 mm。
Based on the ANSYS multiphysics coupling module, a loosely coupled method was used to establish the finite element model of electromagnetic forming of the side-turn hole of the propellant tank parts. The distribution law of electromagnetic force, stress, strain and thickness of the billet was revealed and its variation with time Law, and optimize the discharge voltage and the forming coil diameter and other process parameters. The analysis results show that the billet has larger stress and strain in the fillet area, and the thickness of the billet is greatly reduced. The residual stress of the billet is larger. When the discharge voltage increases, the deformation of the blank increases, but the thickness of the blank increases accordingly. When the inner diameter of the coil increases, the maximum clearance between the blank and the die, the maximum included angle and the minimum thickness of the blank decrease first and then increase. The optimized discharge voltage and forming coil inner diameter are 40 kV and 40 mm, respectively.