锻压技术

基于LSDYNA对U型梁辊弯成形的仿真与分析

英文标题：Simulation and analysis on U-shaped beam roll bending based on LSDYNA

分类号：TG335.4+4

出版年,卷(期):页码：2023,48(12):41-47

摘要：

为解决高强度、大厚度板材辊弯成形尺寸难以控制的问题，针对高强钢厚板U型梁辊弯成形，建立了仿真模型并利用非线性有限元软件进行了成形过程仿真。通过引入辗轧道次，将改变弯角部分的应力分布，将其与仅单纯过弯道次时的应力分布进行对比。通过不同辗轧距离的仿真结果发现：当进行辗轧后弯角部分的应力较仅有过弯道次时的应力更小且分布更加离散，改善了截面缩口问题；分析了辊站间距对边波缺陷的影响，辊站间距越大，边波缺陷越严重。最后通过实验，将测量的实际加工零件尺寸参数和仿真参数进行对比，较目标值的误差在1%以内，符合设计生产要求。

To solve the problem of difficult control of roll bending dimension for high-strength and large-thickness plates, for the roll bending of high-strength steel thick plate U-shaped beam, a simulation model was established, and the forming process was simulated by nonlinear finite element software. Then, the stress distribution in the corner part was changed by introducing the rolling passes which was compared with the stress distribution of only simple bending pass. The simulation results of different rolling distances show that the stress in the corner part after rolling is smaller and more dispersed than that of only bending pass, which improves the cross-sectional shrinkage problem. By adjusting the spacing between roll stations, the influence on the edge wave defects was summarized. The larger the spacing between roll stations, the more serious the edge wave defects. Finally, through experiments, the measured dimensional parameters of actual processed parts and the simulation parameters were compared. The error compared with the target value is within 1% , which meets the design and production requirements.

基金项目：

广西科技重大专项《重型专用汽车轻量化制造关键技术研究与产业化》（桂科AA22068055-2)

作者简介：刘忆恒（1996-），男，硕士，工程师 E-mail：511684740@qq.com 通信作者：傅爱军（1972-），男，硕士，教授级高工，硕士生导师 E-mail：2394523982@qq.com

参考文献：

[1]李元齐,徐厚军.我国冷弯型钢结构发展现状及展望[J].建筑结构,2019,49(19):91-101.

Li Y Q, Xu H J. Research and development of cold-formed steel structures in China [J]. Building Structure, 2019, 49(19):91-101.

[2]程学鹏.冷弯型钢残余应力分布的理论分析与有限元模拟[D]. 武汉: 武汉科技大学,2017.

Cheng X P. Theoretical Analysis and Finite Element Simulation of Residual Stress on Cold-formed Profiled Steel[D]. Wuhan: Wuhan University of Science and Technology,2017.

[3]牛丽丽.超高强度钢辊弯成形工艺变形机理分析[D].北京：北方工业大学, 2017.

Niu L L.The Deformation Mechanism Analysis of the Roll Forming Process for Ultra High Strength Steel[D]. Beijing: North China University of Technology, 2017.

[4]Paralikas J, Salonitis K, Chryssolouris G. Optimization of roll forming process parameters-A semi-empirical approach [J]. The International Journal of Advanced Manufacturing Technology, 2009, 47(9-12): 1041-1052.

[5]Bui Q V, Ponthot J P. Numerical simulation of cold roll-forming processes[J]. Journal of Materials Processing Technology, 2015，202: 275-282.

[6]Safdarian R, Moslemi Naeini H. The effects of forming parameters on the cold roll forming of channel section[J]. Thin-Walled Structures,2015，92: 130-136.

[7]Matthias Moneke，Peter Groche. Counter measures to effectively reduce end flare [A]. International ESAFORM Conference on Material Forming[C]. Dublin，2017.

[8]韩钧,肖爱达,王晓瑜,等.高强度工程机械用钢LG700QT 的开发[J]. 辽宁科技大学学报, 2012,35(2):123-125.

Han J, Xiao A D, Wang X Y, et al. Development of high strength engineering machinery steel LG700QT [J]. Journal of University of Science and Technology Liaoning, 2012,35 (2): 123-125.

[9]小奈弘, 刘继英. 冷弯成形技术[M]. 北京：化学工业出版社, 2008.

奈弘ちかん, Liu J Y. Cold Bending Forming Technology [M].Beijing:Chemical Industry Press, 2008.

[10]Halmos G T.冷弯成形技术手册[M].刘继青，艾正青,译.北京：化学工业出版社， 2008.

Halmos G T. Cold Bend Forming Technology Manual [M]. Translated by Liu J Q, Ai Z Q.Beijing: Chemical Industry Press, 2008.

[11]李湃.锂电池极片辊压过程轧制力模型研究[D].秦皇岛：燕山大学，2022.

Li P. Research on Rolling Force Model of Lithium Battery Pole Plate Rolling Process [D]. Qinhuangdao: Yanshan University, 2022.

[12]刘晓立.复杂截面超高强钢连续辊弯成型回弹预测与控制研究[D]. 北京: 北京科技大学,2018.

Liu X L. Research on Spring Back Prediction and Control Method of Complex Cross Sectional Ultra High Strength Steel in Cold Roll Forming [D]. Beijing: Beijing University of Science and Technology, 2018.

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