【摘要】：系統(tǒng)研究了雙光束焊接過程中能量比對焊縫成形以及能量利用率的影響,采用高速攝像技術實時觀察了不同能量比下的熔池行為,分析了能量比對雙光束焊接特性的影響機制。結果表明,隨著能量比增大,雙光束焊縫熔深先減小后增大,熔寬變化規(guī)律與之相反,并在能量比為50/50時獲得最小熔深和最大熔寬。不同能量比下能量利用率差別較大,能量比為20/80和50/50時分別獲得最大值32.7%和最小值27.8%。熔池尺寸同樣受能量比的影響,隨著能量比增大,熔池長度先增大后減小,而寬度一直減小。能量比對雙光束焊接特性的影響主要歸因于焊接過程中匙孔狀態(tài)以及熔池流動方式的改變。
[Abstract]:The effect of energy ratio on weld forming and energy utilization in the process of two-beam welding is systematically studied. The weld pool behavior under different energy ratios is observed in real-time by high-speed camera technology, and the influence mechanism of energy ratio on the welding characteristics of two-beam welding is analyzed. The results show that with the increase of energy ratio, the penetration of two beam welds decreases first and then increases, and the variation of weld width is opposite. The minimum penetration depth and maximum weld width are obtained when the energy ratio is 50 / 50. When the energy ratio is 20 渭 80 and 50 / 50, the maximum and minimum values are 32.7% and 27.8%, respectively. The size of the molten pool is also affected by the energy ratio. With the increase of the energy ratio, the length of the pool increases first and then decreases, but the width of the weld pool decreases all the time. The effect of energy ratio on the characteristics of two-beam welding is mainly due to the change of keyhole state and molten pool flow mode during welding.
【作者單位】： 哈爾濱工業(yè)大學先進焊接與連接國家重點實驗室;
【基金】：國家重點研發(fā)計劃(2016YFB1102100)
【分類號】：TG456.7

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