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成形工艺参数对U形件回弹影响的仿真分析
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Simulation Analysis of Springback Effect of Forming Process Parameters on Ushaped Workpiece
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    摘要:

    针对U形件弯曲回弹问题,在Abaqus软件中建立6061铝合金薄板U形件拉延成形二维有限元模型,使用Numisheet’ 2011会议回弹测量方法和成形极限图缺陷判据,研究U形件成形过程中单工艺参数对回弹量的影响,通过L9(34)正交试验获取U形件回弹控制最优工艺参数组合。结果表明:不改变其他成形工艺参数,U形件回弹量随着凸、凹模圆角半径或拉延深度的加大,总体呈上升趋势,随凸、凹模间隙值的减小总体呈下降趋势;U形件回弹量随“凸模-板料”摩擦因数的增大而增大,随“凹模、压边圈-板料”摩擦因数或压边力的增大而减小;成形工艺参数影响U形件回弹量的主次顺序依次为“凹模、压边圈-板料”摩擦因数、“凸模-板料”摩擦因数、凸、凹模间隙值、压边力,以优水平工艺参数组合A2B3C1D3进行成形模拟,U形件法兰端部最大位移偏移量为0.84 mm,回弹控制效果明显。

    Abstract:

    Aiming at the springback problem of Ushaped workpiece, the 6061 aluminum alloy sheet Ushaped workpiece stamping two dimensional (2D) finite element model(FEM) is established in Abaqus software. By using the springback measurement method of Numisheet 2011 conference and the defect criteria of forming limit diagram, the effect of single process parameter on the springback of Ushaped workpiece was studied, and the optimal process parameters combination of springback control of Ushaped workpiece was obtained through L9(34) orthogonal test. The results show that the springback of the Ushaped workpiece generally increases with the increase of punchdie corner radius, and decreases overall with the decrease of punchdie gap value without changing other forming process parameters. The springback of Ushaped workpiece increases with the increase of the friction coefficient of punchsheet, and decreases with the increase of the friction coefficient of diesheet, blankholdersheet or blankholding force. The primary and secondary order of the impact of the forming process parameters on the springback of Ushaped workpiece are the friction coefficient of diesheet and blankholdersheet, the friction coefficient of punchsheet, the punchdie gap value, and the blankholding force. Ushaped workpiece forming simulation are performed using the optimal level process parameters combination A2B3C1D3, the maximum displacement offset of the flange end position of the Ushaped workpiece is 084 mm, and the springback control effect is obvious.

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钟文,项辉宇,冷崇杰,姜文正.成形工艺参数对U形件回弹影响的仿真分析[J].机床与液压,2019,47(19):145-152.
. Simulation Analysis of Springback Effect of Forming Process Parameters on Ushaped Workpiece[J]. Machine Tool & Hydraulics,2019,47(19):145-152

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  • 在线发布日期: 2020-03-12
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