大型复杂截面型材拉弯成形数值模拟

Numerical Simulation on Profile Stretch-bending with Large Complex Cross Section

对一种复杂截面型材的拉弯成形过程进行了有限元数值模拟分析。通过模拟试验得到最佳的模具与型材间隙;通过分析预拉量和补拉量对截面畸变和回弹的影响,得出最佳加载过程参数。对大尺寸异型截面型材的模拟过程进行了优化,解决了拉弯成形模拟中动态效应明显、计算量过大等问题。

This paper deals with the stretch-bending process of an extruded aluminum profile 2A12-O which possesses complex cross section and large length dimension through ABAQUS.The proper clearance between die and profile was probed and obtained.A set of best loading parameters were determined by studying the influence of pre-stretch and post-stretch on distortions and springback.With material property inputted directly from experiments,the overall stretch-bending process of this aluminum profile was simulated and optimized,greatly eliminating potential forming defects.