In the manufacturing process of box-type transformer shell, two-way welding and electric welding are generally used to weld the box plate. Prepare AC arc candle machine, bidirectional welding machine, covered electrode, welding wire, spot welding machine and electrode holder in the early stage.

In the process of box transformer shell welding, attention should be paid to placing the workpiece in an accurate position according to the drawing requirements. After the measurement is qualified, it should be fixed by spot welding before welding, and the clamping fixture should be used if necessary. Try to use flat welding. If welding is performed at other positions, adjust the welding current to reduce it by 10% compared with the flat welding current. When the weld is long or the structure is assembled, it should be fixed by spot welding first, and then welded to avoid deformation; After the box-type transformer is welded, it is necessary to remove the coating, clean up the flash and slag, and ensure that the weld is flat and clean; The grounding device of box-type transformer shell should be fully welded around, and the connecting thread should not be damaged. After molding, the shape should be adjusted according to the requirements and standards of the drawings.