Robot arc welding generally adopts the combination of automatic arc welding machine and robot system, mainly including the following parts: robot body, control system, teaching device, welding power supply, welding gun, welding fixture, safety protection facilities. The system composition can also selectively expand the following devices according to the different welding methods and different welding process requirements of specific workpiece to be welded : wire feeder, cleaning and cutting device, cooling water tank, flux conveying and recovery device (SAW), mobile device, welding positioner, sensor device, dust removal device, etc.

Robot arc welding has the following characteristics:             

Stabilize and improve the welding quality to ensure its uniformity. When robot welding is used, the welding parameters of each weld are constant, the weld quality is less affected by human factors, which reduces the requirements of workers' operation technology, so the welding quality is stable. In manual welding, the welding speed and dry elongation are all variable, so it is difficult to achieve the quality uniformity.           

The working conditions of the workers have been improved. Robot welding workers are only used to load and unload the workpiece, away from the welding arc, smoke, private splash and so on.            

Improve labor productivity. The robot has no fatigue and can be continuously produced 24 hours a day. In addition, with the application of high-speed and efficient welding technology, the efficiency of robot welding is improved more obviously.            

Clear product cycle, easy to control product output. The robot's production beat is fixed, so the production schedule is very clear.           

It can shorten the period of product replacement and reduce the corresponding equipment investment. It can realize the welding automation of small batch products. The biggest difference between a robot and a special machine is that it can modify the program to adapt to the production of different workpieces.            

At present, robot arc welding has been widely used in transportation, heavy industry, ships, construction, machinery, vehicles, aviation, containers and other industries.