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JWJ > Volume 33(6); 2015 > Article
Journal of Welding and Joining 2015 December;33(6) :60-66.
Published online December 31, 2015.
doi:https://doi.org/10.5781/JWJ.2015.33.6.60
Finite Element Analysis on the Improvement of Residual Deformation of the Part After Pulse Laser Welding of Circular Cover
Kwan-Woo Kim*, Hae-Yong Cho*
*Dept. of Mechanical Engineering, Chungbuk National University, Cheongju 362-763, Korea
Correspondence: Hae-Yong Cho  Email: hycho@cbungbuk.ac.kr
  Published online December 31, 2015
ABSTRACT
Molten zone shape of pulse laser welding is affected by welding conditions such as beam power, beam speed, irradiation time, pulse frequency, etc. and is divided into conduction type and keyhole type. It is necessary to design heat source model for irradiation of laser beam in the pulse laser welding. Shape variables and the maximum energy density value of the heat source model are different depending on the molten zone shape. In this paper, pulse laser welding simulation for joining of cylindrical part and circular cover was carried out. The heat source model for pulse laser beam with circular path was applied to the heat input boundary condition, radiative and conductive heat transfer were considered for the thermal boundary condition. For each phase, thermal and mechanical properties according to temperature were also applied to analysis. Analytical results were in good agreement with the molten zone size of specimen under the same welding conditions. So, the reliability of the welding simulation was verified. Finally, the improvements for reducing residual deformation after cover welding could be reviewed analytically.
Keywords: Pulse laser | Welding | Heat source | Analysis | Residual deformation
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