铝合金厚板时效成形回弹补偿算法

 时效成形是一种适用于飞机整体壁板零件制造的成形工艺，具有回弹量大的特点，因此需要在准确预测回弹量的基础上对模具型面进行修正，以消除回弹对成形精度的影响。本文提出了一种基于有限元计算驱动的适用于铝合金时效成形的模具型面迭代修正算法，并应用该算法进行了单曲率的圆柱面零件、双曲率的球面零件及马鞍形零件的修模计算分析。通过4次迭代计算，使圆柱面和球面零件成形误差减小到0.4 mm以内；通过5次迭代，使马鞍形零件除4个角部外，其余部位型面误差小于0.5 mm。证明了该回弹补偿算法具有计算精度高、收敛速度快的优点。

Compensation Algorithm for Springback in Age Forming for Aluminum Alloy Thick Plate

The age forming technique, characterized by huge springback, has been developed to manufacture integral wing-skin panel components. The die surface should be modified, based on accurate prediction of springback, to eliminate the effect of springback on forming precision. A finite element method (FEM) drove iterative die surface modification algorithm is presented for age forming of aluminum alloy plate. This algorithm is used in die surface modification for the arc, sphere and saddle parts. The maximal shap...