激光焊接时正确选择侧吹工艺可以增大焊缝熔深。
The penetration depth of weld metal can be increased by selecting correct gas-assisting blowing in laser welding.
以动量守恒原理为基础，建立了侧吹射流轴轨迹的数学模型。
A mathematical model for the trajectory of the jet axis was proposed on the principle of momentum conservation.
结果表明，侧吹喷嘴高度和侧吹流速的变化对光致等离子体行为和焊缝形貌有显著的影响；
The result shows that laser induced plasma and weld geometry are sensitive to side nozzle height, its inclination angle and side gas flow rate;
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