Friction role in deformation behaviors of high-strength TA18 tubes in numerical control bending

2017 2nd International Seminar on Advances in Materials Science and Engineering

Fang, Jun^1,2 ; Liang, Chuang^2 ; Lu, Shiqiang^2 ; Wang, Kelu^2 ; Zheng, Deliang^1

Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, 330038, China^1

National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang, 330063, China^2

关键词: Cross-section deformation;    Deformation behavior;    Elastic-plastic finite element;    Friction coefficients;    High-strength ta18 tubes;    Numerical control;    Numerical control bending;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012172/pdf
DOI  :  10.1088/1757-899X/231/1/012172

来源: IOP

【 摘 要 】

In order to reveal the friction role in deformation behaviors of high-strength TA18 tubes in numerical control (NC) bending, a three dimensional (3D) elastic-plastic finite element (FE) model of high-strength TA18 tubes for whole process in NC bending was established based on ABAQUS code, and its reliability was validated by the experimental results in literature. Then, the bending deformation behaviors under different friction coefficients between tube and various dies were studied with respect to multiple defects such as wall thinning, wall thickening and cross section deformation. The results show that the wall thinning ratio and cross section deformation ratio increase with the increase of the friction coefficient between mandrel and tube fmor decrease of the friction coefficient between pressure die and tube fp, while the friction coefficient between bending die and tube fbhas no obvious effect on these. The wall thickening ratio decreases with the increase of fb, fmor decrease of fp.