变截面板材腹板翘曲缺陷的影响因素研究  

Study on Factors Influencing Warping Defects in Variable Crosssection Panel Core

作　　者：刘江[1] 熊自柳 肖骏峰 吴康[1] 孙勇[1] Liu Jiang;Xiong Ziliu;Xiao Junfeng;Wu Kang;Sun Yong(Institute of Advanced Technology,University of Electronic Science and Technology of China,Shenzhen 457001)

机构地区：[1]电子科技大学(深圳)高等研究院,深圳457001

出　　处：《汽车工艺与材料》2024年第6期6-10,共5页Automobile Technology & Material

基　　金：深圳市龙华区数智化成形系统装备协同创新平台(深龙华科创科计字(2023)42号流水号:J10M00792305290004);深圳市科技创新委员会(ZDSYS20210813095534001,JCYJ20210324123202008,JCYJ20210324115412035,JCYJ20220818103200001);广东省应用科学技术研究发展计划(2022A1515010363,2021A1515110880);中南大学国家重点实验室高性能复杂制造(Kfkt2021-05);深圳市龙华区科技创新局(J10M00792305290004)。

摘　　要：随着产品更新换代的速度提高,柔性辊压工艺受到业内广泛关注,但由于其成形过程复杂性带来不可避免的缺陷,针对三次弯曲曲线的变截面板材成形过程进行数值模拟仿真,研究了材料、厚度和翼板高度对翘曲的影响。结果表明,板材产生的翘曲缺陷与纵向应变有关,当纵向应变分布均匀时,翘曲缺陷最小。通过正交模拟设计分析得出影响翘曲高度的工艺参数主次顺序为厚度、翼板高度、板材材料,得出结论:与铝合金材料相比,高屈强比高强度钢制备的翘曲高度降低,但低屈强比高强度钢制备的翘曲高度反而增高。As the pace of product updates accelerates,the flexible roll forming process has garnered widespread attention within the industry.However,due to the inherent complexity of its forming process,inevitable defects arise.To address this,numerical simulation and analysis of the forming process of variable cross-section panels along a three-point bending curve were conducted,examining the impact of material,thickness,and flange height on warping.The results indicate that the warping defect in the panels is related to longitudinal strain,with the minimum warping defect occurring when the longitudinal strain distribution is uniform.Orthogonal simulation design analysis determined the primary and secondary order of process parameters affecting warping height as thickness,flange height,and panel material.The conclusion is that compared to aluminum alloy materials,the warping height is reduced when using highstrength steel with a high yield strength ratio,whereas the warping height increases when using high-strength steel with a low yield strength ratio.

关 键 词：变截面板材 数值模拟仿真 腹板翘曲 正交试验设计 

分 类 号：TH165[机械工程—机械制造及自动化]