The numerical analysis of energy effect in laser-TIG hybridwelding

摘要

The hybrid source that combined CO2 laser with TIG arc to proceed welding was analyzed. Basedon an energy model, the temperature field and weld shape were calculated numerically. The heattransfer characteristic of the hybrid heat source to workpiece and its effect to weld shape were alsoanalyzed. Through analyzing the enhancement effect of the hybrid heat source, the absorptioneffect and defocusing effect of the hybrid arc to laser were calculated, and the regularity of theenergy density to the current was obtained subsequently. At last, the critical energy matches toinduce the enhancement effect of CO2 laser-TIG arc hybrid welding were obtained.