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对于波控短路过渡CO2焊,电弧峰值电流Ipa,电弧基值电流Iba以及由峰值电流切换到基值电流所用的时间(拖尾时间tw)等电流波形参数是可调的,它们对过渡稳定性和焊缝质量具有很大影响,利用正交试验,对不同送丝速度下电流波形参数进行了优化.结果表明,电弧峰值电流的影响最大.送丝速度为320 cm/min时,电流波形参数Ipa,Iba和tw无论如何调整,飞溅率均在2.5%以上,焊缝表面质量差;送丝速度为360~400 cm/min时,最优电流波形参数为:Ipa=440 A,Iba=50 A,tw=0.6 ms.而在400 cm/min的送丝速度下,在宽广的电流波形参数范围内(Ipa为440~480 A,Iba为30~50A,tw为0.6~0.8 ms)均可获得飞溅率极低、焊缝表面质量好的稳定焊接过程.
Current waveform parameters such as wave-control short-circuit transition CO2 welding, arc peak current Ipa, arc base current Iba, and peak current switching to base current (trailing time tw) are adjustable, and their effects on transient stability And welding quality are greatly influenced. The parameters of the current waveforms at different wire feed speeds are optimized by orthogonal test. The results show that the peak current of the arc has the greatest influence. When the wire feed speed is 320 cm / min, the current waveform parameters Ipa, Iba and tw adjusted in any case, the splatter rate of 2.5% or more, the weld surface quality is poor; wire feed speed of 360 ~ 400 cm / min, the optimal current waveform parameters: Ipa = 440 A, Iba = 50 A, tw = 0.6 ms .While at a feed rate of 400 cm / min, the parameters of wide current waveform (Ipa = 440-480 A, Iba = 30-50 A, tw = 0.6-0.8 ms) Get extremely low spatter rate, good weld surface quality and stable welding process.