1.Manual welding machine can be divided into manual arc welder and manual argon arc welding machine the two categories, its feature is hand-delivery electrode, manual tracking weld seam, efficiency is relatively low, the cost is relatively high.2. Semiautomatic welderFeatures are automatic wire feed, Manual welding and tracking the weld seam，compare with the manual welding the efficiency is improved and reduce costs. There are CO2 shield welder, MIG/MAG consumable electrode gas shielded welding machine
3. Automatic welding machineFeatures are automatic wire feed, automatic tracking the weld seam, high efficiency, and reduce costs.There are submerged-arc welding and so on.
