基于厚板的三辊滚弯成形数值模拟及优化

滚弯成形由于结构简单、加工效率高而被广泛用于工业制造领域.首先,介绍了三辊滚弯技术的成形原理,借助几何模型对成形半径和上辊压下量之间的关系进行推导;然后,使用有限元分析软件ABAQUS对三辊滚弯成形的圆形截面工件进行数值模拟,从模拟结果分析了成形过程中的板材应力分布以及成形半径大小.鉴于板材加工过程中无法避免的回弹现象...

Numerical simulation and optimization on three-roll bending based on thick plate

Roll bending is widely used in industrial manufacturing due to its simple structure and high processing efficiency. Therefore, the forming principle of three-roll bending technology was first introduced, and then the relationship between forming radius and upper roll reduction amount was deduced with the help of geometric model. Then, the workpiece with a circular cross-section formed by three-roll bending was numerically simulated by finite element analysis software ABAQUS, and the stress distribution and the forming radius for sheet metal in the forming process were analyzed. In view of the unavoidable springback phenomenon in the sheet metal forming process, in order to improve the processing accuracy of roll bending, the process parameters of upper roll reduction amount were adjusted, and the influence laws of the optimized process parameters on the forming radius of workpiece were analyzed. After selecting the optimal parameters, the verified tests were conducted finally. The results show that increasing the upper roll reduction amount in single pass roll bending is helpful to compensate the springback and improve the dimensional accuracy of workpiece, and the test results fit well with simulation results.