| 摘要 |
<p>A method and a system to increase heat input to a weld during an arc welding process.. A series of electric arc pulses are generated between an advancing welding electrode (191) and a metal workpiece (199) using an electric arc welding system capable of generating an electric welding waveform (100) to produce the electric arc pulses. A cycle of the electric welding waveform includes a pinch current phase (120) providing an increasing pinch current level (121), a peak current phase (130) providing a peak current level (131), a tail-out current phase (140) providing a decreasing tail-out current level (141), and a background current phase (110) providing a background current level (111). At least one heat- increasing current pulse (150) of the cycle is generated, providing a heat-increasing current level (151), during the background current phase, where the heat-increasing current level is above the background current level. The cycle of the electric welding waveform with the at least one heat-increasing current pulse may be repeated until the arc welding process is completed.</p> |
