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Chen Yanbin
Li Liqun
Feng Xiaosong
Fang Junfei
State Key Laboratory of Advanced
Welding Production Technology,
Harbin Institute of Technology,
Harbin 150001, China |
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MODEL OF LASER-TIG
HYBRID
WELDING HEAT SOURCE
Abstract: The welding mechanism of laser-TIG hybrid welding process is analyzed. With the variation of arc current, the welding process is divided into two patterns: deep-penetration welding and heat conductive welding. The heat flow model of hybrid welding is presented. As to deep-penetration welding, the heat source includes a surface heat flux and a volume heat flux. The heat source of heat conductive welding is composed of two Gaussian distribute surface heat sources. With this heat source model, a temperature field is calculated. The finite element code MARC is employed for this purpose. The calculation results show a good agreement with the experimental data.
Key words:
Laser-TIG hybrid welding Deep-penetration welding Heat conductive
welding Heat source model Temperature field
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