基于熔滴过渡模型的GMAW焊接发尘率计算
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摘要: 通过对实心焊丝的GMAW焊接时的熔滴过渡进行金属蒸发理论分析，结合“质量—弹簧”理论，建立了基于熔滴过渡模型的GMAW焊接发尘率预测模型. 模型分析了熔滴过渡过程中熔滴温度和发尘率的变化，同时通过四阶龙格—库塔算法获得了熔滴过渡的频率及过渡熔滴半径等特征参数. 结果表明，熔滴在焊丝端部长大阶段中的发尘率占总发尘率的大部分，熔滴温度超过2 417 K后，发尘率将陡升，模型计算的熔滴过渡频率与发尘率与实测数据非常吻合.
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