超宽对称式三辊滚弯工艺上辊挠度补偿优化  

Compensation optimization on upper roller deflection in super wide symmetrical three-roller roll bending process

作　　者：张芷娟 施宇杰 张浩稼 鲁世红[1] Zhang Zhijuan;Shi Yujie;Zhang Haojia;Lu Shihong(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《锻压技术》2024年第1期173-181,共9页Forging & Stamping Technology

摘　　要：针对超宽对称式三辊滚弯机的上辊受板材成形力的反作用力作用,挠曲变形较为明显,从而导致成形板材精度不足的问题,对上辊的受力变形进行分析,并利用ABAQUS有限元分析软件对超长铝合金板材滚弯工艺进行三维动态仿真。为了解决仿真中圆柱体刚性支撑与可变形上辊间的穿透现象,设计开发了有效的补偿结构——一种可简化为支撑块的绕上辊环形分布的多辊支撑结构。相较于传统的双辊支撑结构,多辊支撑结构模型减小上辊挠度的效果更优,且其简化的支撑块模型有效地消除了穿透现象。利用有限元法结合响应曲面法,探究支撑块各物理参数对上辊挠度补偿的影响规律,结果表明,上辊最大挠度随着支撑块组数、长度、宽度的增加而减小;并基于优化目标设计支撑块的最优参数组合。For the problem of insufficient accuracy of the formed plate caused by the obvious deflection deformation,which because the upper roller of super wide symmetrical three-roller roll bending machine was affected by the reaction force of plate forming force,the force deformation of the upper roller was analyzed,and the 3D dynamic simulation of the roll bending process of the ultra-long aluminum alloy plate was carried out by finite element analysis software ABAQUS.Then,in order to solve the penetration phenomenon between the rigid cylindrical support and the deformable upper roller in simulation,an effective compensation structure was designed and developed,namely,a multi-roller support structure distributed annularly around the upper roller was simplified to a support block.Compared with the traditional two-roller support structure,the multi-roller support structure model had a better effect on reducing the upper roller deflection,which effectively eliminated the penetration phenomenon.Furthermore,the finite element method combined with the response surface method was used to investigate the influence laws of physical parameters for the support block on the deflection compensation of the upper roller.The results show that the maximum deflection of the upper roller decreases with the increasing of the number,length and width of the support block.And the optimal parameter combination of the support block was designed based on the optimization objective.

关 键 词：超宽 对称式 滚弯 挠度 双辊支撑结构 多辊支撑结构 

分 类 号：TH161[机械工程—机械制造及自动化]