Spot welding machines can be divided into universal (universal, special-purpose) spot welding machines according to their uses;
According to the number of solder joints welded at the same time, it is divided into: single-point type, double-point type and multi-point type;
According to the conduction mode, it is divided into: unilateral, bilateral;
According to the transmission mode of the pressurizing mechanism, it is divided into: pedal type, motor-cam type, pneumatic type, hydraulic type, compound type (pneumatic-hydraulic combined type);
According to the characteristics of operation, it is divided into: non-automation, automation;
According to the installation method, it is divided into: fixed, mobile or portable (suspended) spot welding machine;
According to the moving direction of the movable electrode (usually the upper electrode) of the welding machine, it is divided into: vertical stroke (the electrode moves in a straight line) and arc stroke.