| 板材多点成形中回弹的数值模拟及补偿研究 |
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| 引用本文： | 杨建鸣,郝洁.板材多点成形中回弹的数值模拟及补偿研究[J].机床与液压,2011,39(21). |
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| 作者姓名： | 杨建鸣 郝洁 |
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| 作者单位： | 内蒙古科技大学机械工程学院,内蒙古包头,014010 |
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| 摘 要： | 回弹是板材多点成形中一个必须解决的问题。利用有限元软件LS-DYNA对板材冲压成形的回弹进行数值模拟,采用动态显式算法模拟板材成形过程,隐式算法模拟卸载回弹过程。对不同曲率半径、不同屈服强度的圆柱面成形件进行数值模拟,分析得出回弹趋势和回弹分布,提出通过修正基本体群成形面来补偿回弹的方法,并用B样条曲线拟合生成的曲面。经过两次补偿,成形件精度提高,证明该方法可以很好地补偿多点成形中的回弹。研究结果对于减小因回弹带来的误差,提高成形件的成形精度具有十分重要的意义。
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| 关 键 词： | 多点成形 LS-DYNA软件 回弹 显-隐式算法 |
Research on Numerical Simulation and Compensation of Springback of the Multi-point Forming for Sheet Metal |
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| YANG Jianming,HAO Jie.Research on Numerical Simulation and Compensation of Springback of the Multi-point Forming for Sheet Metal[J].Machine Tool & Hydraulics,2011,39(21). |
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| Authors: | YANG Jianming HAO Jie |
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| Affiliation: | YANG Jianming,HAO Jie(Mechanical Engineering School,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China) |
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| Abstract: | Springback is a problem that must be solved in multi-point forming.Finite element software LS-DYNA was used to simulate sheet metal stamping springback.Dynamic-explicit algorithm was employed to analyze the forming processes and the implicit algorithm was used to analyze unloading processes.The springback processes with different radius and different yield strength were simulated and the factors which had effect on the springback were analyzed.A springback compensation method was proposed through modifying ... |
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| Keywords: | Multi-point forming LS-DYNA software Springback Explicit-implicit algorithm |
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