1. Maintain the correct angle of the welding rod.
2. Choose a small diameter welding rod, diameter 3.2 or diameter 4. Choose low current welding, lower the arc, and use short arc welding.
3. Use the correct strip transport method:
1. When I-shaped groove butt joint is upward vertical welding, you can choose linear, zigzag, crescent-shaped strip transport and arc pick. Method welding
2. When making other types of groove butt butt welding, the first layer of welding seam is generally welded by the arc method or the crescent or triangular strip method with a small swing. The subsequent layers can be welded Use crescent or zigzag strip transport method for welding
3. When welding T-shaped joints vertically, the operation method of strip transport is similar to that of other-shaped groove butt welding. In order to prevent bite on both sides of the weld, The edges and roots are not fully welded, and the arc should have an appropriate dwell time on both sides and top corners of the weld.
4. When welding the cover layer, the strip transport method should be reasonably selected according to the requirements for the weld surface. , If the weld surface requirements are slightly higher, the crescent-shaped strip transport method can be used. If the weld seam surface is only required to be flat, the zigzag strip transport method can be used.
Extended information
Operation procedures for vertical welding
The current used should not be too large, slightly lower than the fillet welding current. The size of the welding rod should be selected according to the weldment. Depends on the thickness.
When welding, the arc should not be too large and should be short arc welding. Welding method, adopt zigzag or triangle welding method. If it is multi-layer welding, the current should be smaller in the first pass, and the coating and other debris should be cleaned up in subsequent welds to reduce slag inclusion or welding opacity.
The specific operation needs to be experienced slowly by yourself.
The swing must be in place and evenly, otherwise the weld will not look particularly good-looking and may have undercuts or large weld burrs.
During vertical welding, the molten pool metal and molten droplets tend to fall due to the action of gravity and separate from the weldment, so welding nodules are easily generated. However, due to the low melting point and strong fluidity of slag, the molten pool metal and slag are easy to separate, and slag inclusions are not easily generated.
Baidu Encyclopedia-Vertical Welding