Simulation and Modeling of Shielding Gas on the Welding Defects in the Fiber Laser Keyhole Welding

被引：0

作者：

Liu, Wei ^{[1
]}

Ai, Yuewe ^{[1
]}

Jiang, Ping ^{[1
]}

Liu, Yang ^{[1
]}

Mi, Gaoyang ^{[2
]}

机构：

[1] Huazhong Univ Sci Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China

来源：

3RD INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE AND MECHANICAL ENGINEERING, (ICMSME 2016) | 2016年

关键词：

Fiber laser welding; Shielding gas; Welding defects; Keyhole; Numerical simulation;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a numerical model is proposed to investigate the keyhole dynamic behaviors and the formation process of hump. Both of the welding processes with and without shielding gas are calculated during the simulation. It is revealed that the hump generated in the weld is caused by the metal flows in the rear part of the keyhole aperture driven by the resultant force of surface tension, recoil pressure and buoyance force. The shielding gas can significantly change the fluid flows in the molten pool and hence suppress the formation of the hump. The proposed method is validated by the confirmation experiments and good agreement between the simulated and experimental results have been found.

引用

页码：31 / 35

页数：5

共 14 条

[1] A defect-responsive optimization method for the fiber laser butt welding of dissimilar materials [J].