2. Generally, this machine is multi-purpose (double-sided shielded welding+argon arc welding+manual welding), mainly focusing on that function. If there is a large amount of welding on both sides, it is recommended to buy two kinds of welding machines directly, so that the process performance and reliability are guaranteed.
3. The welder is an electrical appliance that provides a certain power supply for welding. Commonly used welding machines can be divided into three types according to welding current: DC, AC and pulse, but AC and DC inverter welding machines are commonly used. The main part of the welding machine is the step-down transformer, and the two ends of the secondary coil are the workpiece to be welded and the covered electrode, which ignite the arc when working and melt the covered electrode in the gap of the workpiece at the high temperature of the arc.