铝合金薄板高斯脉冲MIG焊

Gaussian pulsed MIG welding of aluminum alloy sheet

提出了GAUSS-MIG焊模型,成功在2 mm和3 mm厚度的铝合金薄板进行了焊接试验.通过分析试验采集的信号,发现焊接电流电压波形规整、分布有规律,重复性好,能量输入集中,弧长稳定,证明了GAUSS-MIG焊的焊接过程平稳.GAUSS-MIG焊焊缝的力学性能比传统的铝合金双脉冲焊有一定的提高,并且焊缝外观鱼鳞纹清晰工整,表面光亮,熔高和熔深合适,焊接过程几乎无飞溅发生,电弧声柔和,焊接质量好.

It is hard to weld aluminum alloy for its inherent features. A new welding method,which uses a Gaussian current waveform with a smooth curve and concentrated energy input,was applied to welding of aluminum alloy sheet. GAUSSMIG welding model was proposed,2 mm and 3 mm aluminum sheet were successfully welded in experiments. Current and voltage waveforms were regular with no broken arcs or short circuits.Moreover,the arc voice sound was soft with low splatter. By contrast with double pulsed welding,GAUSS-MIG welding improves the mechanical properties of weld,weld seam appearances are bright with regular scaly stripes and proper weld reinforcement and penetration.