How to operate multi-layer welding of steel structure? Steel structure engineering company

How to operate multi-layer welding of steel structure? To connect, and there are some more complex steel components, multi-layer welding must be used. The multi-layer welding operation process is more complicated, and the technical requirements are generally higher. The steel structure engineering company, the entire welding process can be said to be very delicate.

1. Welding the first layer

Use a small diameter electrode to weld the first layer, the current is slightly larger, and the wire is transported in a straight line , the electrode sleeve can be directly pressed on the welding leg, and the arc crater can be filled at the end. When welding the first layer, the arc is aimed at the intersection of the two plates, and the welding is carried out according to the single-layer single-pass welding straight line method.

The point that steel structure engineering companies must pay attention to is: remove the welding slag after welding, otherwise it will easily cause the blockage of the machine.

2. Weld the second layer

Use large-diameter electrodes to weld the second layer, and the current should not exceed Large, otherwise the vertical plate is easy to undercut, and the strip is moved in an oblique circle or inverted zigzag shape. When welding the second layer of weld bead, the working angle is 55--60, and the arc is inclined based on the lower edge of the first weld bead. The circle swings so that the second weld bead presses one-third of the first weld bead, the electrode walking angle is 6--80, and the slag is removed after welding.

When welding the second layer, the slag of the first layer of weld bead must be knocked out to avoid slag inclusion. If it is found that there is undercut when welding the first layer, it should stay there for a longer period of time to eliminate the undercut phenomenon. This not only facilitates the welding work of the second floor but also eliminates the hidden dangers of the first floor steel structure engineering company.