Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (4): 1182-1189.doi: 10.13229/j.cnki.jdxbgxb20200807

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Influence of process parameters on cross-sectional deformation of rotary draw bending forming of automobile protective beams

Wen-ming JIN1,2(),Tian LIANG1,2,Ce LIANG1(),Yi LI1,Jun-tao LI1,3,Ji-cai LIANG1,2   

  1. 1.College of Materials Science and Engineering，Jilin University，Changchun 130022，China
    2.Roll Forging Institute，Jilin University，Changchun 130022，China
    3.Changchun Faway Adient Automotive System Co. ，Ltd. ，Changchun 130033，China
  • Received:2020-10-16 Online:2021-07-01 Published:2021-07-14
  • Contact: Ce LIANG E-mail:j.wm@163.com;liangce@jlu.edu.cn

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Abstract:

To solve the cross-section deformation defects in the process of rotary draw bending the profile with “日”-shaped into the automobile protective beam, based on the self-developed bending device, the finite element analysis software ABAQUS and the orthogonal test simulation method are used. The comprehensive influences of the process parameters on the cross-section deformation, including bending radius, number of cores and core mold gap are investigated. The results show that the position of the maximum deformation section is affected by the number of cores, each deformation of the section decreases with the increase of the bending radius and the number of cores, first decreases and then increases with the die gaps. When the bending radius is 600 mm, the number of cores is 2, and the gap is 0.75 mm, the effect of reducing cross-section deformation is better, and the validity of the simulation results is verified by experiments.

Key words: manterial synthesis and processing, rotary draw bending forming, profile with “日”-shaped section, sectional deformation defects, orthogonal experiment

CLC Number: 

  • TG356

Fig.1

Schematic diagram and size of cross section of profile"

Fig.2

Finite element model of device for RDB and schematic diagram of working principle"

Fig.3

Motion trajectory diagram of reference point D of movable pressing die"

Fig.4

Sectional distortion diagram and description of section deformation of profile"

Table 1

Factors and levels"

水平因 素
半径/mm间隙/mm芯头数
14000.250
25000.751
36001.252
41.75

Fig.5

Measurement section and node position"

Fig.6

Influence of rotary draw bending radius on deformation each section"

Fig.7

Influence of rotary draw bending radius on deformation of each section"

Table 2

Process parameter combination"

试验半径/mm间隙/mm芯头数
16000.252
26000.752
36001.252
46001.752

Fig.8

Influence of clearance on deformation of each section"

Fig.9

RDB machine and semi-finished protective beam"

Fig.10

Value of each deformation in experiment"

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