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为了解决2219合金大尺寸曲面件室温塑性差、成形极限低和容易起皱等问题,采用Abaqus/CAE软件对2219合金搅拌摩擦焊接板胀形进行了计算机模拟,研究了液压压力和热处理对成形零件壁厚分布、应力应变分布的影响。结果表明,随着液压压力的增加,焊接板最小壁厚逐渐降低,最大主应变和胀形高度逐渐增加,且最小壁厚位置也从圆角处过渡至中心处,而最大主应变所在的位置都在圆角处;相比于焊态胀形板,热处理后的最小壁厚有所减小,且胀形高度有所增加;随着液压压力的增加,胀形板的胀形高度呈现逐渐增加的趋势,在液压压力为25 MPa时胀形板在凹模圆角区域发生破裂,与计算机模拟结果相符合,这能为实际胀形过程提供必要参考。
In order to solve the problems of poor room-temperature plasticity, low forming limit and easy wrinkling of 2219 alloy large-size curved surface, the bulging of 2219 alloy friction stir welded plate was simulated by Abaqus / CAE software. The effect of hydraulic pressure and heat treatment on the forming part Wall thickness distribution, stress and strain distribution. The results show that with the increase of hydraulic pressure, the minimum wall thickness of the welded plate gradually decreases, the maximum principal strain and bulging height increase gradually, and the minimum wall thickness position also transits from the fillet to the center, while the position of the maximum principal strain Compared with the welded bulging plate, the minimum wall thickness after heat treatment decreases and the bulging height increases. As the hydraulic pressure increases, the bulging height of the bulging plate gradually increases With the increasing of the hydraulic pressure, the bulging plate ruptures in the fillet area of the die at the hydraulic pressure of 25 MPa, which is consistent with the computer simulation results. This can provide the necessary reference for the actual bulging process.