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在激光-TIG复合焊接过程中,根据激光与电弧等离子体相互作用原理及控制方程,利用有限元数值模拟方法研究激光对TIG焊接电弧等离子体温度分布的影响。在电弧稳定状态下,分别计算了不同焊接电流和激光强度的电弧等离子体温度分布情况,并由此分析激光对电弧等离子体温度分布的影响。结果表明:随着焊接电流的下降,激光对电弧温度的影响作用越来越明显,并且激光光强越大,影响越明显;决定电弧温度分布的主要因素也由焊接电流转变为由激光光强和焊接电流共同作用。本研究为进一步研究焊接质量奠定理论基础。
In the process of laser-TIG hybrid welding, the influence of laser on the temperature distribution of TIG welding arc plasma was studied by the finite element numerical simulation method according to the laser-arc plasma interaction principle and control equation. Under the condition of steady arc, the temperature distribution of arc plasma with different welding current and laser intensity was calculated, and the influence of laser on the temperature distribution of arc plasma was analyzed. The results show that the influence of laser on arc temperature becomes more and more obvious with the decrease of welding current, and the greater the laser intensity is, the more obvious the influence is. The main factor that determines the arc temperature distribution also changes from welding current to laser intensity And welding current work together. This study lays a theoretical foundation for further study of welding quality.