铝合金锥面筒形环件轧制成形数值模拟与实验研究

铝合金异形截面环件是航天航空和国防装备的重要结构件,铝合金异形截面环件目前多采用自由锻成形或者简化为矩形截面环件后轧制成形,使环件生产周期长、材料利用率低、环件的组织性能差,严重限制了该类环件的应用和发展。针对2A14铝合金锥面筒形环件进行了轧制过程数值模拟和实验研究,提出了形状相似环件毛坯设计方法和锥形环件轧制过程的合理工艺参数范围计算方法,并基于ABAQUS/Explicit平台建立该环件轧制过程的三维热力耦合有限元模型。通过分析毛坯结构对成形环件尺寸误差和变形均匀性的影响,得到了等截面积环件毛坯成形尺寸误差最小的结果。并根据模拟结果进行轧制实验验证,成功轧制出合格的锥面筒形环件。

Numerical simulation and experimental study on aluminum alloy tapered cylindrical ring in roll forming

Aluminum alloy profiled ring is an important structural part for aerospace and national defense equipment. Nowadays aluminum profiled ring is usually formed by free forging or by rolling forming simplified as rectangle section ring. So the ring production cycle is too long with low material utilization rate, poor ring organization performance, which severely restricts the application and development of this ring. The rolling process of aluminum alloy 2A14 cone cylinder ring was numerically simulated and researched by experiments, and the similar shape forging blank design method and the taper ring rolling process calculation method of the reasonable process parameters were put forward. Then, based on ABAQUS/Explicit platform, the three dimensional coupled thermo-mechanical finite element model for the ring rolling process was established. And by analyzing the influence of the blank structure on the dimension error and the deformation uni-formity of the formed ring, the minimum size error of equal section area blank was obtained. Furthermore, the simulation result was veri-fied by experiment of rolling, and the qualified tapered cylindrical ring was rolled out successfully.