吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (12): 3397-3403.doi: 10.13229/j.cnki.jdxbgxb.20220054

• 材料科学与工程 • 上一篇    

日字形防护梁绕弯成形形变数值模拟

梁策1(),黄富雷1,梁继才1,2,李义1()   

  1. 1.吉林大学 材料科学与工程学院，长春 130022
    2.吉林大学 重庆研究院，重庆 401123
  • 收稿日期:2022-01-12 出版日期:2023-12-01 发布日期:2024-01-12
  • 通讯作者: 李义 E-mail:liangce@jlu.edu.cn;henrylee@jlu.edu.cn
  • 作者简介:梁策（1987-），女，副教授，博士.研究方向：材料加工.E-mail：liangce@jlu.edu.cn
  • 基金资助:
    吉林省科技发展计划项目(20220201048GX)

Numerical simulation on deformation of protective beam with “日”-shaped section during rotary draw bending

Ce LIANG1(),Fu-lei HUANG1,Ji-cai LIANG1,2,Yi LI1()   

  1. 1.College of Materials Science and Engineering，Jilin University，Changchun 130022，China
    2.Chongqing Research Institute，Jilin University，Chongqing 401123，China
  • Received:2022-01-12 Online:2023-12-01 Published:2024-01-12
  • Contact: Yi LI E-mail:liangce@jlu.edu.cn;henrylee@jlu.edu.cn

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摘要：

使用有限元模拟方法，建立了“日”字形截面防护梁绕弯成形过程的有限元模型，并对其可靠性进行验证。解决了高强钢防护梁产品质量预测问题，得到了芯模种类、型材厚度和绕弯成形速度对截面变形的影响规律。结果表明，带有自锁装置的柔性芯模对截面变形的抵制效果最好。随着型材厚度的增加，截面变形减小；随着弯曲速度的增大，截面变形先减小后增大。该方法为防护梁产品成形质量预测提供了理论依据。

关键词: 材料加工工程, 日字形截面型材, 绕弯成形, 有限元模拟, 截面变形

Abstract:

Finite element simulation method was used to establish the finite element model for the bending process of a “日”-shaped protective beam， and the reliability of model has been verified. The problem of predicting the quality of high-strength steel protective beams has been solved， and the influence of core mold type， profile thickness， and bending forming speed on section deformation has been obtained. The results indicate that the flexible core mold with a self-locking device has the best resistance to cross-sectional deformation. As the thickness of the profile increases， the deformation of the cross-section decreases. As the bending speed increases， the cross-sectional deformation first decreases and then increases. This method is of great significance， which has provided a theoretical basis for predicting the forming quality of protective beam products.

Key words: material processing engineering, profile with “日”-shaped section, rotary draw bending, finite element simulation, section deformation

中图分类号: 

  • TG356

图1

绕弯成形示意图"

图2

“日”字型防护梁的截面尺寸"

图3

有限元模型"

图4

芯模示意图"

表1

网格划分结果"

名称单元类型单元尺寸单元数量
型材S4R419 097
辊轮R3D483 900
活动压模R3D481 316
弯曲模R3D481 950
紧凑型柔性芯模R3D4819 023
刚性芯模R3D486 839
自锁型柔性芯模R3D4814 725

图5

模拟与试验对照"

表2

绕弯后型材的变形量"

参数模拟数据试验数据
高度变形量/%8.2328.573
宽度变形量/%2.5382.614
支撑梁偏移量/mm3.9734.188

图6

截面变形量示意图"

图7

切面位置"

图8

芯模对截面变形的影响"

图9

模具间隙对截面变形的影响"

图10

厚度对截面变形的影响"

图11

弯曲速度对截面变形的影响"

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