Title: Investigation on stress and strain distributions of hollow-part with triangular cross-section by spinning

Authors: Xiuquan Cheng; Zhouyi Lai; Qinxiang Xia

Addresses: School of Aircraft Maintenance Engineering, Guangzhou Civil Aviation College, Guangzhou 510403, China ' School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China ' School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China

Abstract: The non-circular cross-section hollow-part spinning is one of the recent breakthroughs of the traditional spinning processes. To reveal the mechanism of the non-circular spinning, the spinning process of the hollow-part with triangular cross-section was investigated. The spun part was divided into the straight-side and filleted-corner along the circumferential direction, and the bottom-corner, side-wall and opening-end along the generatrix direction. The simulation results show that during the non-circular part spinning, wrinkling occurs easily at the flange area of the straight-side; the distributions of equivalent stress and strain are 120° uniformly distributed along the circumferential direction. The differences on distributions of equivalent stress and strain between straight-side and filleted-corner are obvious. The maximum equivalent stress locates at the opening-end, where springback occurs easily. The maximum equivalent strain locates at the bottom-corner of straight-side and the centre of the side-wall of filleted-corner, where over-thinning of wall thickness occurs easily. The strain states of the straight-side and filleted-corner are different, the former is approximately in the state of plane strain and the latter is in the state of volumetric strain. A non-circular spinning device was designed and manufactured, a set of experiments were carried out. The experiment results conform well with the simulation one.

Keywords: non-circular spinning; hollow parts; triangular cross-section; stress distribution; strain distribution; strain state; simulation; wrinkling.

DOI: 10.1504/IJMPT.2013.058967

International Journal of Materials and Product Technology, 2013 Vol.47 No.1/2/3/4, pp.162 - 174

Received: 26 Jul 2013
Accepted: 05 Oct 2013
Published online: 28 Jun 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article