Welded pipe geometry changing during the expanding process

9th International Multidisciplinary Scientific and Research Conference "Modern Issues in Science and Technology" Workshop "Advanced Technologies in Aerospace, Mechanical and Automation Engineering"

自然科学;工业技术

Frunkin, D.B.^1 ; Gurevich, L.M.^2 ; Novikov, R.E.^2 ; Bannikov, A.I.^2 ; Serov, A.G.^2 ; Dyatlov, N.A.^3

Volzhsky Pipe Plant, Volzhsky, Russia^1

Volgograd State Technical University, Volgograd, Russia^2

Promteh, Volzhsky, Russia^3

关键词: Front end;    Large diameter;    Metal stress;    Ovality;    Spring-back;    Welded pipes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/450/3/032048/pdf
DOI  :  10.1088/1757-899X/450/3/032048

来源: IOP

【 摘 要 】

The simulation of the expanding process of large-diameter welded pipes was carried out. It was shown that a pipe's metal stress-strain state has a significant effect on the value of the final ovality of the pipe ends. The front end of the pipe is expanding under conditions when the entire body of the pipe is non-expanded and this leads to a significant distortion of the shape of the pipe after springback. While the rear end is expanding in conditions when the entire body of the pipe is expanded, whereby the rear pipe end has a smaller ovality.