Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (12): 3397-3403.doi: 10.13229/j.cnki.jdxbgxb.20220054

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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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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

CLC Number: 

  • TG356

Fig.1

Schematic diagram of rotary draw bending"

Fig.2

Section size of profile with rectangular ribbed"

Fig.3

Finite element model"

Fig.4

Schematic diagram of the core dies"

Table 1

Meshing results"

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

Fig.5

Simulation and test comparison"

Table 2

Deformation of profile after rotary draw bending"

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

Fig.6

Schematic diagram of section deformation"

Fig.7

Section position"

Fig.8

Influence of core die on section deformation"

Fig.9

Influence of die clearance on section deformation"

Fig.10

Influence of thickness of profile on section deformation"

Fig.11

Influence of bending speed on section deformation"

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