【摘要】：基于電弧可分離性,以焊絲為導(dǎo)引電極建立分體等離子弧,研究不同旁路工作模式下焊接參數(shù)對熔滴過渡行為的影響.結(jié)果表明,旁路為恒流模式時,隨著旁路電流的增加熔滴穩(wěn)定快速過渡,隨著送絲速度的增加過渡頻率增加,但其達(dá)到8.2 m/min時會使焊絲來不及熔化;在熔滴過渡瞬間,旁路及等離子弧電壓均發(fā)生明顯波動但兩者趨勢相反,而旁路及等離子弧電流均無波動.旁路為恒壓模式時,隨著旁路電壓及送絲速度的增加,熔滴穩(wěn)定而快速地過渡,但旁路電壓過大時會出現(xiàn)失穩(wěn)現(xiàn)象;在熔滴過渡瞬間,旁路及等離子弧電壓、旁路電流、甚至等離子電流都出現(xiàn)明顯波動.
[Abstract]:Based on arc separability, a plasma arc was established with wire as guide electrode to study the effect of welding parameters on droplet transfer behavior in different bypass operation modes. The results show that when the bypass is in constant current mode, the droplet transition is stable and fast with the increase of bypass current, and the transition frequency increases with the increase of wire feeding speed. However, when the bypass current reaches 8.2 m/min, the welding wire will not melt. At the moment of droplet transfer, the voltage of bypass and plasma arc fluctuates obviously, but the trend is opposite, but the current of bypass and plasma arc does not fluctuate. When the bypass is in constant voltage mode, with the increase of bypass voltage and wire feeding speed, the droplet will transition steadily and quickly, but the instability will occur when the bypass voltage is too large. At the moment of droplet transfer, the voltage of bypass and plasma arc, bypass current and even plasma current fluctuate obviously.
【作者單位】： 北京工業(yè)大學(xué)汽車結(jié)構(gòu)部件先進(jìn)制造技術(shù)教育部工程研究中心;哈爾濱工業(yè)大學(xué)先進(jìn)焊接與連接國家重點(diǎn)試驗(yàn)室;河北科技大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(No.51375021) 先進(jìn)焊接與連接國家重點(diǎn)試驗(yàn)室開放課題研究基金資助項目(AWJ-16-M06) 國家科技重大專項資助項目(2014zx04001-171)
【分類號】：TG456.2

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