During spot welding, the weldment forms a lap joint and is pressed between the two electrodes

(1) When spot welding, the heating time of the joint area is very short, and the welding speed is fast.

(2) Spot welding only consumes electric energy and does not need filling materials or flux, gas, etc.

(3) Spot welding quality is mainly guaranteed by spot welding machine. Simple operation, high mechanization and automation, high productivity.

(4) Low labor intensity and good working conditions.

(5) Because the welding power on is completed in a short time, need to use large current and pressure, so the process of program control is more complex, welding capacity is large, the price of equipment is higher.

(6) It is difficult to carry out NDT for solder joints