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研究了铝合金2024-T3板料在新淬火状态下的成形过程。首先测量了2024-T3板材在新淬火状态下的力学性能,与原始状态性能比较发现,屈服强度和抗拉强度降低,延伸率增大,韧性增加。基于数值模拟方法模拟了橡皮成形过程的回弹规律,对翼肋零件的翻边回弹进行了数值模拟,并通过试验进行了比较,发现采用数值模拟与试验结果吻合较好,模拟与试验间的偏差是由于板料发生加工硬化导致的。因而采用模拟可以得到的考虑回弹的模具形状,据此修正模具,使回弹后形状达到了设计的精度。模拟与试验的比较表明了该方法的可行性。
The forming process of aluminum alloy 2024-T3 sheet under newly quenched condition was studied. First, the mechanical properties of 2024-T3 plate under the newly quenched condition were measured. Compared with the original condition, the yield strength and tensile strength decreased, the elongation increased, and the toughness increased. Based on the numerical simulation method, the law of rebound of the rubber forming process was simulated, and the flanging rebound of the ribbed parts was numerically simulated and compared through experiments. The numerical simulation was in good agreement with the experimental results. The deviation is due to sheet metal work hardening. Therefore, simulation can be taken into account the springback shape of the mold, thus correcting the mold so that the shape after the rebound to achieve the design accuracy. The comparison of simulation and experiment shows that the method is feasible.