摘要
为了探究成形参数对高强度钢辊弯件成形质量的影响,并对工艺参数进行优化,提出了一种辊弯成形工艺优化方法。首先,应用LS-DYNA有限元软件模拟LG700高强度钢U型辊弯件的成形过程。然后,通过Box-Behnken响应面设计对高强度钢U型辊弯件进行仿真试验,分析辊弯道次、过弯角、辊站间距和辊缝间距等成形工艺参数以及厚度、法兰高度、圆角半径等几何参数对辊弯件偏差角和纵弓高度的影响,并通过拟合得到偏差角和纵弓高度二者的二阶响应模型。最后,采用改进的多目标灰狼优化(MOGWO)算法对特定尺寸辊弯件进行工艺优化,并通过实例进行验证。结果表明,将优化后的工艺参数用于高强度钢辊弯成形过程中导致其偏差角由0.78°降至0.24°,纵弓高度由1.58 mm降至1.20 mm,成形质量得到提高,满足相关产品的装配精度要求。
To investigate the influence of forming parameters on the forming quality of high strength steel roll bended parts and optimize process parameters,an optimization method for roll bending forming process was proposed.Firstly,the LS-DYNA finite element software was used to simulate the forming process of LG700 high strength steel U-shaped roll bended parts.Subsequently,the Box-Behnken response surface design was used in the simulation tests of high strength steel U-shaped roll bended parts.The influences of forming process parameters such as roll bending pass,over-bending angle,distance between forming stands and roller gap and geometric parameters such as thickness,flange height and corner radius on the deviation angle and longitudinal bow height of roll bended parts were analyzed.The second-order response model of the deviation angle and longitudinal bow height was obtained through fitting.Finally,the improved multiobjective gray wolf optimization(MOGWO)algorithm was adopted for the process optimization of roll bended parts with specific size and this method was validated through specific instances.The results show that using the optimized process parameters in the high strength steel roll bending forming process leads to a reduction of the deviation angle from 0.78°to 0.24°,and the longitudinal bow height from 1.58 mm to 1.20 mm.The forming quality is improved and the assembly precision requirements of related products are satisfied.
作者
赵彬荐
李兆军
蒋春玲
刘忆恒
黄伟
ZHAO Bin-jian;LI Zhao-jun;JIANG Chun-ling;LIU Yi-heng;HUANG Wei(School of Mechanical Engineering,Guangxi University,Nanning 530000,China;SINOTRUK Liuzhou Yunli Special Vehicle Co.,Ltd.,Liuzhou 545000,China;School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545000,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第7期89-99,共11页
Journal of Plasticity Engineering
基金
广西科技重大专项(桂科AA22068055,桂科AA22068061)。
