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基于Deform-3D与AZ31镁合金材料模型对1号镁合金电池筒的反挤压成形过程进行数值模拟,完成模具设计及各工艺参数下反挤压成形过程的对比优化。结果表明:在相同挤压速度下,随挤压温度升高,等效应力峰值不断降低,等效应变峰值不断升高,温度场向高温区推进,并在280℃时,损伤值降至最低,说明在该温度下AZ31镁合金反挤压过程的破损率最小;另外,在280℃下,随着挤压速度的提高,等效应力场峰值不断减小,等效应变场峰值增大,温度场峰值向高温区推进,并在12 mm·s-1的挤压速度下达到损伤极值最小值。根据优化工艺进行反挤压成形试验验证,生产出了合格的产,品且筒壁组织均匀细化。
Based on Deform-3D and AZ31 magnesium alloy material model, the anti-extrusion process of No. 1 magnesium alloy battery can was numerically simulated, and the mold design and contrast extrusion process under various process parameters were optimized. The results show that under the same extrusion speed, the peak value of equivalent stress decreases with the increase of extrusion temperature, and the peak value of equivalent strain increases continuously. The temperature field propels into the high temperature region and decreases to the lowest at 280 ℃ , Indicating that the AZ31 magnesium alloy at the temperature of the anti-extrusion process the smallest damage rate; In addition, at 280 ℃, with the extrusion rate increases, the equivalent stress field continuously decreases, the equivalent strain field increases, The peak of the temperature field is advanced to the high temperature zone and reaches the minimum value of the damage extreme at the extrusion speed of 12 mm · s-1. According to the optimization of the process of anti-extrusion test validation, to produce a qualified product, product and uniform refinement of the cylinder wall.