Effect research and prediction of bellows parameters on the wall thickness distribution of TRB pipe bulging V-shaped bellows

doi:10.16731/j.cnki.1671-3133.2025.05.014

Abstract

Abstract: In order to study the influence of bellows parameters such as the angle,fillet radius,and straight edge length of bellows on the wall thickness distribution of TRB pipe non axial feeding hydraulic forming V-shaped bellows, finite element simulation is used forming experimental for corrugated pipes with different parameters. The uniformity of wall thickness is used as the evaluation index,a response surface prediction model is established between bellows parameters and positive,negative,and total differences. Aiming at the problem of not meeting the uniform distribution of wall thickness when forming large angle bellows under theoretical design conditions,a method of changing is proposed for improvement. The results indicate that the angle has a significant impact on the distribution of wall thickness,with an increase in the angle leading to a decrease in wall thickness uniformity,the fillet radius and straight edge length on wall thickness distribution is not significant impact. When the total difference is less than 20.0 %,the maximum angle value is 32.1 degrees,and the total difference is less than 10.0 %,the maximum angle value is 25.2 degrees under theoretical design conditions. Taking a certain parameter combination as an example,after improvement,the total difference decreased from 28.4 % to 15.2 %,forming V-shaped corrugated pipes with larger angles and uniform wall thickness is feasible.

Key words: Tailor-Rolled Blank (TRB) tube, V-shaped bellows, finite element analysis, hydraulic forming, response surface, wall thickness distribution

CLC Number:

TG394

GU Xu, LI Mingxiang, QIAN Hong, GAO Guansheng, YANG Chunhong, LEI Zhigang. Effect research and prediction of bellows parameters on the wall thickness distribution of TRB pipe bulging V-shaped bellows[J]. Modern Manufacturing Engineering, 2025, 536(5): 115-120.

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