锻压技术

基于辊式成形弯曲角度分配函数的轧辊孔型优化

英文标题：Optimization on roll pass based on roll forming bending angle distribution function

分类号：

出版年,卷(期):页码：2022,47(3):46-53

摘要：

针对50型螺旋式钢板仓成形设备存在各工位成形载荷不均匀的问题，基于显式动力学对板料成形进行了数值模拟仿真研究。建立了弯角处等效应力与各工位成形载荷的关系；探究了道次间距对板料弯角处等效应力的影响；基于辊式成形弯曲角度分配函数对边Ⅲ各工位的成形角度重新分配，对不同孔型参数的方案进行数值模拟仿真对比。结果表明：道次间距对弯角等效应力的影响较小，边Ⅲ弯角处的等效应力最大；当变动指数κ=-0.4时，边Ⅲ的成形弯曲角度分配较为合理，数值模拟仿真中弯角处等效应力与样机各工位成形载荷的变化一致，各工位成形载荷不均匀的问题得到有效改善。

For the problem of uneven forming load at each station for 50-type spiral steel silo forming equipment, the numerical simulation research on sheet forming was conducted based on explicit dynamics, and the relationship between equivalent stress at corner and forming load of each station was established. Then, the influence of pass spacing on the equivalent stress at the corner of sheet was explored. Based on the roll forming bending angle distribution function, the forming angle of each station for side Ⅲ was redistributed, and the schemes with different pass parameters were simulated and compared. The results show that the pass spacing has little effect on the equivalent stress at the corner, and the equivalent stress at the corner of side Ⅲ is the largest. When the variation index к=-0.4, the distribution of bending angle for side Ⅲ is more reasonable, and the equivalent stress at the corner in the numerical simulation is consistent with the change of forming load at each station in the prototype. Thus, the problem of uneven forming load for each station is effectively improved.

基金项目：

国家自然科学基金资助项目（51775249）

文波（1997-），男，硕士研究生 E-mail：1500700472@qq.com 通信作者：袁浩（1975-），男，博士，副教授 E-mail：285817681@qq.com

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