冲压件表面冲击线影响因素的数值模拟分析

Numerical simulation analysis of drive line influence factors on stamping part surface

为了探寻形成冲压件表面冲击线的影响因素,采用Dynaform板料成形软件,以曲面扁壳件为模型对不同工艺条件下的成形过程进行模拟分析。模拟结果表明,间隙压边对冲压件表面冲击线的影响不大,随着压边力的增加,冲击线位移量在12.5-13.5 mm之间震荡。然而恒定压边对冲击线影响较大,合理设置压边力可以有效降低冲击线的产生。拉深筋对冲击线的影响也较大,其不同设置方式可控制冲击线位移方向和位移量大小。此外,增加冲压件的拉深深度,冲击线的位移量增大。通过合理地设置成形工艺可以有效地控制冲击线的位移量和方向,提高产品的表面精度和成形质量。

In order to explore the factors of drive line formation on the surface shell part,sheet forming numerical simulation software dynaform was used and the forming process of the surface drawing parts model under different technology conditions was simulated.The simulation results show that fixed blank holder gap has little effect on drive line.The displacements of drive line have a shock between 12.5 and 13.5 mm when the blank holder forces（BHFs） increases.However,constant BHF has a great influence on the displacement of drive line,and a proper BHF could effectively reduce the displacement of drive line.Drawbead also impacts greatly,and its different setting ways could control the displacement and direction of drive line.Besides,the displacement of drive line will increase as the drawing depth increases.Therefore,a proper forming technology could effectively control the displacement and direction of drive line,and then improve the surface accuracy and forming quality of the products.