船用薄板柔性渐进成形工艺数值模拟及实验研究

Numerical simulation and experimental research on flexible incremental forming method of marine plate

针对船体外板典型的双曲面板材成形提出了局部压载和渐进滚弯两种柔性渐进成形方式。通过有限元数值模拟技术在正交实验下分别探究局部压载成形过程中板料厚度、凸凹模间距、凸模压下量和凸模圆弧半径对板料成形回弹半径的影响,以及渐进滚弯成形过程中滚轮下压深度对板料弯曲半径的影响。以双曲面船板中帆形板为例,基于ABAQUS/Explicit＆Standard求解平台及正交实验参数结果,利用局部压载成形和渐进滚弯成形对双曲面板材进行多道次有限元仿真模拟成形。最后通过双曲面板材多道次局部压载成形实验验证了船用钢板柔性渐进成形工艺的可行性及有限元分析结果的可靠性。

The two flexible incremental forming methods namely local bending forming method and incremental rolling forming method were proposed aiming at typical doubly curved plate forming for hull plate. The influence of plate thickness,mold gap,punch distance and punch radius on springback radius of plate forming during the local bending forming process and the influence of forming distance on bending radius of plate forming during incremental rolling forming process were studied by finite element analysis（ FEA） and orthogonal test. Taking one of doubly curved plates,the sail plate,as the example,based on the ABAQUS/Explicit Standard solvers platform and the results of orthogonal test,multi-pass forming of finite element simulation for doubly curved plates were taken by using local bending method and incremental rolling method respectively. Finally,the feasibility of the flexible incremental forming methods for the marine steel plate and the reliability of the finite element analysis results were verified by the multi-pass local bending experiment.