| 摘要 |
PURPOSE:To obtain a stable weld bead having always a specified reinforcement of weld, by calculating the deposition rate of a wire necessary for packing a groove in accordance with the detected width of the groove gap and changing the polarity ratio of the wire. CONSTITUTION:A control device 6 calculates the necessary deposition rate of a wire by receiving the gap width signal from a sensor 2 and determines the polarity ratio of a welding machine 5. If the polarity ratio is selected suitably, only the deposition rate of the wire can be regulated without changing electric current, and the packing rate of the wire as weld metal is controlled in accordance with the width of the gap G. |
