三辊滚弯成形过程的回弹研究与试验分析

发布时间：2018-03-07 17:42

本文选题：三辊卷板机　切入点：回弹　出处：《塑性工程学报》2017年05期 　论文类型：期刊论文

【摘要】：回弹是板材滚弯成形过程中一种不可避免的现象,直接影响着板材的加工精度。为了提高三辊卷板机板材回弹后的成形质量,建立了三辊回弹理论模型,预测了板材回弹后的滚弯成形半径;利用ABAQUS仿真软件分析了滚弯变形区的应力场分布,分析了上辊下压量、轧辊与板材间的摩擦力以及多道次滚弯成形对板材回弹的影响规律;通过多道次滚弯试验进行了验证。试验结果表明:随着上辊下压量和摩擦系数的增大,板材回弹量的下降趋势逐渐趋于平缓;多道次滚弯加工降低了板材回弹时的波动,提高了回弹均匀性,板材的成形质量随之提高;相较于多道次滚弯试验,三辊回弹理论模型的最大误差为8.4%,有限元模型的最大误差为6.7%,都具有较高的精度。
[Abstract]:Springback is an inevitable phenomenon in the forming process of sheet metal roll bending, which directly affects the processing accuracy of the sheet metal. In order to improve the forming quality after springback of the sheet metal in the three-high roll rolling machine, a theoretical model of three-roll springback is established. The radius of roll forming after springback is predicted, the distribution of stress field in rolling deformation zone is analyzed by ABAQUS simulation software, the pressure of upper roll, the friction force between roll and sheet, and the influence of multi-pass rolling forming on springback are analyzed. The results show that with the increase of upper roll pressure and friction coefficient, the trend of springback decreases gradually, and the fluctuation of springback is reduced by multi-pass rolling. Compared with the multi-pass rolling bending test, the maximum error of the three-roll springback theoretical model is 8.4, the maximum error of the finite element model is 6.7, and the accuracy of the model is higher than that of the multi-pass rolling bending test.
【作者单位】：上海理工大学机械工程学院;镇江市锻压机床厂;泰州职业技术学院机电技术学院;
【基金】：2015江苏省重点研发计划(BE2015139)
【分类号】：TG306

【相似文献】