Include: welding power , welding mechanization mechanical system , control system and other auxiliary equipment. A power supply , the device complexity , cost, and so a direct impact on the economic benefits of the welding , the welding equipment welding method is to choose important factors must be considered . Welding current with alternating current power supply and DC power into two categories. General AC arc welding machine structure is relatively simple and low cost.Manual arc welding equipment required easiest , in addition to a power source , but only equipped with welding cables and welding electrode holder clamp can be. Should be given priority. MIG arc welding requires automatic welding , automatic trolleys and other mechanical equipment . Moreover, you should have protective gas supply system for conveying , through the cooling water supply system and the welding torch and so on. Vacuum electron beam welding to be equipped with high-voltage power supply, the vacuum chamber and specialized electron gun . Laser Aluminium Welding Wire  requires a certain power lasers and focusing system . Therefore, these two methods should have specialized welding tooling and auxiliary equipment, the equipment is relatively complex , high power, and thus the cost is relatively high. Since a high voltage electron beam welding and X-ray radiation, so also there are certain safety precautions and prevent X-ray radiation shielding facilities.

Arc welding is the most widely used welding methods . It includes : manual arc welding , submerged arc welding , gas tungsten arc welding , plasma arc welding , MIG welding and so on.
Most electric arc between the electrode and the workpiece is burning arc as a heat source . In the formation of joints, may or may not use filler metal . The electrode used in the welding process molten welding wire , known as MIG arc welding , such as Tungsten Welding Electrode , submerged arc welding , gas-shielded arc welding , electric arc welding cored wire ; electrode used in the welding process does not melt the carbide or tungsten rod when called does not melt arc welding , such as gas tungsten arc welding , plasma arc welding and so on.