连续柔性成形过程的有限元建模方法  

Research on finite element modeling method of continuous flexible roll forming process

作　　者：隋洲[1] 蔡中义[1] 王蜜[1] 李明哲[1] 

机构地区：[1]吉林大学材料科学与工程学院,吉林长春130025

出　　处：《华中科技大学学报（自然科学版）》2014年第6期17-21,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51075186)

摘　　要：通过分析连续柔性成形装置的结构特点,提出了柔性辊离散和连续两种建模方法.从接触方式、应力分布等方面对两种有限元模型进行比较,结果表明:柔性辊离散模型中的刚体短辊以分段折线逼近目标曲线形状,与板料为点接触,柔性辊连续模型中的实体辊与板料为光滑曲线接触;相比于光滑曲线接触,从厚度分布可以看出点接触导致了鞍面件厚度分布不均匀,产生了局部变形;柔性辊连续模型的应力分布较离散模型均匀.采用两种有限元模型成形鞍面件和球面件并与实验结果比较,可知柔性辊连续模型预测实验件的偏差小于离散模型的偏差,说明其更适用于模拟连续柔性成形过程.Flexible roll discrete and continuous modeling methods were proposed by analyzing the structure characteristics of continuous flexible roll forming setup.Two finite element models were compared from the following aspects：contact way and stress distribution.The results show that the contact way between rigid roll and sheet metal is point contact in discrete model,which makes uneven distribution of thickness and has local deformation on saddle surface part,but that is smooth curve contact in continuous model.Compared with discrete model,the stress distribution of continuous model are more uniform.The saddle and spherical surface parts were formed by the two finite element models,which show that the deviations of predicting experimental parts by continuous model are smaller than those by discrete model,indicating that the former is more suitable for simulating the continuous flexible roll forming process.

关 键 词：连续成形 板料 柔性辊 有限元模型 数值模拟 

分 类 号：TG306[金属学及工艺—金属压力加工]