在考虑塑性变形和加工硬化机制的基础上,利用有限元模拟软件DEFORM对汽车车壳铝合金大型弧形工件成形过程进行数值模拟,并对成形过程中采用不同预制坯料的充填情况、应变均匀性以及成形载荷进行分析。结果表明,预制坯方案II的成形性能较好,可提高汽车车壳铝合金弧形件的充填率和应变均匀性,降低载荷。 Based on the plastic deformation and work hardening mechanism, finite element simulation software DEFORM was used to simulate the forming process of the large arc-shaped workpiece of car body shell aluminum alloy. In the process of forming, the filling condition, strain homogeneity And forming load analysis. The results show that the forming performance of the preform program II is better, which can improve the filling rate and strain uniformity and reduce the load of the car aluminum alloy arc.