| 基于回弹控制的板料成形工艺多目标优化 |
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| 引用本文： | 阳湘安,阮锋,周驰.基于回弹控制的板料成形工艺多目标优化[J].华南理工大学学报(自然科学版),2010,38(12). |
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| 作者姓名： | 阳湘安 阮锋 周驰 |
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| 作者单位： | 华南理工大学机械与汽车工程学院; |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对板料回弹控制问题,提出了一种基于多目标优化的综合评判回弹的方法,建立了以等效应力偏差来表征并考虑高斯积分点位置影响的目标函数和以等效塑性应变表征的目标函数;运用试验设计技术、响应面法和多目标遗传算法,结合LS-DYNA关键字文件建立了基于回弹控制的成形工艺参数的集成优化模型,并分析了变压边力和拉延筋力对回弹的影响.结果表明:先小后大的变压边方式可以保证产品产生较大的塑性变形,后期较大的压边力还能使厚度方向的应力偏差减少,从而显著抑制回弹;而根据产品形状分段设置拉延筋,并分别施加合适的拉延筋力对于抑制回弹也有一定的效果;优化后回弹由1.952 50mm减少到0.674 51mm,证实了模型的多目标函数能够综合评判回弹.
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| 关 键 词： | 回弹 多目标优化 板料成形 工艺参数 变压边力 拉延筋力 |
Multi-Objective Optimization of Forming Process of Sheet Metal Based on Springback Control |
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| Yang Xiang-an,Ruan Feng,Zhou Chi.Multi-Objective Optimization of Forming Process of Sheet Metal Based on Springback Control[J].Journal of South China University of Technology(Natural Science Edition),2010,38(12). |
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| Authors: | Yang Xiang-an Ruan Feng Zhou Chi |
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| Institution: | Yang Xiang-an Ruan Feng Zhou Chi(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China) |
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| Abstract: | In order to control the springback in the forming process of sheet metal,a synthetical method to evaluate the springback is proposed based on multi-objective opitmization.In this method,two objective functions are established,one of which considers both the equivalent stress deviation and the coordinates of Gaussain integration point,and the other considers the equivalent plastic strain.Then,an integrated optimization model based on the springback control is put forward by combining the design of experiment... |
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| Keywords: | springback multi-objective optimization sheet metal forming process parameter variable blank holder force drawbead restraining force |
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