1, Co2 gas shielded welding, welding wire diameter 0.8 or 1.2. In the past, this process was used to weld the assembly angle of special-shaped steel pipes for steel doors and windows, and the wall thickness of special-shaped pipes was also formed by steel plates with a thickness of1mm.
2, commonly used arc welding. Covered electrode has a diameter of 2.5 mm, and it is best to use DC welding machine. If it is a butt weld, a strip shim can be added, and the thickness of the shim is greater than 4mm, which is convenient for disassembly.
3. Welding torch for wind welding and oxyacetylene, and covered electrode for No.8 steel wire.
4, spot welding, strength can not reach multi-point welding, anti-leakage can do waterproof glue.
5. Roll welding. Thin plate roll welding. If this device is the best choice.
6. Brazing, commonly known as copper. After the two steel plates are superimposed, borax is added to the brass strip, and the copper strip is heated and melted by an air gun.
7, silver welding, adding silver foil borax between two steel plates, clamping, pressurizing and heating. In the past, this process was used to weld steel band saw blades.