Temperature Field and Residual Stress Analysis of the Gear on CO₂ Laser Welding Process

Abstract:

The welding technique is one of important technologies on the gear manufacturing process. The special welding temperature cycle is the basic conditions of the welding residual stress appearance in the gear. The large welding residual stress will create the large deformation after the gear welding, which will affect the gear service behavior. In this paper, the finite element method has used to simulate the gear laser welding process. The temperature field and residual stress has described. The research results show that the biggest residual compressive stress appears on the transverse direction of welding region. In the longitudinal direction, the biggest residual tensile stress appears on both sides of the welding seam line. When the laser welding power is 2.4 kW and welding speed is 20mm/s, the no apparent welding deformation’s 20CrMnSi gear can be achieved really.

• Periodical: Applied Mechanics and Materials (Volume 86)
• Pages: 670-673
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.86.670
• Online since: August 2011
• Authors: Jian Luo, Fei Li, Ke Liang Xue, De Jia Liu, Hai Wei Zhang
• Keywords: Finite Element Method (FEM), Gear, Laser Welding, Residual Stress, Temperature Field

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