Tools: cutting machine, welding machine.

1, according to the technical requirements to make a good groove, gas cutting or plasma cutting can be used.

2, vertical seam welding, first use small current to make (spot welding) joint smooth, and then weld the outer layer, you can use bottom-up swinging operation from left to right to form a fish-scale weld, which is beautiful and firm.

3. In flat seam welding, if the steel plate is thick and the groove is large, a small current should be used for the first time, and the current can be gradually increased for the second or third time to ensure penetration welding.