Equipment required
A set of manual electric welding equipment, a handle angle grinder, an electric air hammer, and a plane ruler.
Preparation before welding
1. Check and debug the equipment to ensure the normal operation of the equipment;2. Prepare φ4.0J402 welding rod and dry it at 300°C-350°C for one hour.
Welding process
1. Assemble the conebrae and the large flange together according to the requirements of the drawing, and then divide the large flange into 8 equal parts.
2. Due to the thick flange and large groove, the welding adopts segmented symmetry and multi-layer welding.
Weld quality
The strength of the weld is required to be at least the strength of the base metal. The surface of the weld is smooth and smooth, and there are no defects such as burn-through, porosity, welding leakage, slag inclusion, undercut, and incomplete welding. The residual height is less than 2mm.
Precautions
1. When laying the foundation, J506 welding rod must be used for manual surfacing welding, and low-current welding is used. Welding in strict accordance with the welding process.
2. After each welding position, the deformation of the flange plane should be clamped with a level.
3. Hammer the weld with an air hammer while welding to achieve the effect of relieving stress.