摘要
目的探究“日”字形截面型材绕弯成商用车防护梁时工艺参数对型材壁厚的影响,以提高防护梁制件的产品质量。方法基于有限元仿真分析,利用正交试验设计模拟出不同工艺参数配比下型材的成形过程,并对型材弯曲段外侧壁厚减薄量和内侧壁厚增厚量进行极差分析。结果工艺参数中弯曲半径和芯模的芯头个数对外侧减薄率和内侧增厚率影响极大,其余参数相对影响较小。依据正交试验结果并综合分析,最终确立了较好的防护梁绕弯成形方案,并通过试验验证了模拟结果的有效性。结论证明了选择合适的工艺参数配比可以显著减轻型材的壁厚变化,从而极大提高防护梁制件的产品质量。
The purpose of this article is to explore the influence of process parameters on the wall thickness of the profile with“日”-shaped section when the profile is rotary draw bending into the protective beam for commercial vehicles,so as to improve the product quality of the protective beam.Based on the finite element simulation analysis,the orthogonal experimental design was used to simulate the forming process of the profile under different process parameters ratio,and the range analysis on the thickness reduction of the outer wall and the increase of the inner wall thickness in the bending area of the profile are conducted.Finally,the research shows that the bending radius and the number of core heads of mandrel have a great influence on the outer thinning rate and inner thickening rate,and other parameters have relatively little influence.Based on the results of the orthogonal experiment and comprehensive analysis,a better rotary draw bending plan of the protective beam is finally established and the validity of the simulation results is verified through experiments.Studies have proved that selecting the appropriate combination of process parameters ratio can significantly reduce the wall thickness changes of the profile,thereby greatly improving the product quality of the protective beam.
作者
丁立波
梁田
李明杰
梁继才
DING Li-bo;LIANG Tian;LI Ming-jie;LIANG Ji-cai(Baicheng Vecational and Technical College,Baicheng 137000,China;College of Materials Science and Engineering,Jilin University,Changchun 130000,China)
出处
《精密成形工程》
北大核心
2021年第2期105-110,共6页
Journal of Netshape Forming Engineering
关键词
绕弯成形
“日”字形截面型材
正交试验
有限元仿真
工艺参数
rotary draw bending
profile with“日”-shaped section
orthogonal experiment
the finite element simulation analysis
process parameters
