Generally speaking, the weld wire feeder we often refer to is the MIG welder. MIG (MAG) welding uses a fusible welding wire as an electrode, and uses the arc burning between the continuously fed welding wire and the workpiece to be welded as a heat source to melt the welding wire and the parent metal. During the welding process, the shielding gas – argon gas is continuously delivered to the welding area through the welding gun nozzle to protect the arc, the molten pool and the parent metal nearby from the harmful effects of the surrounding air. The welding wire is continuously melted and should be transferred to the welding pool in the form of molten droplets, which will fuse with the molten parent metal and condense to form weld metal.
Principles of Wire Feed Welding
Mig works on the same principle as TIG or Arc Welding .It works on the basic principle that an electric arc generates heat. This heat further uses to melt the consumable electrode and the base metal which solidify together and form a strong joint. Shielding gas is also supplied through the nozzle which protects the welding area from other reactive gases. This provides a good surface finish and a stronger joint.
As we know, MIG welding requires a continuous supply of consumable electrodes to weld two plates. This consumable electrode is used in the form of wires. These wires are continuously supplied by a wire feeding mechanism or system. It controls the speed of the wire and pushes the wire from the welding gun to the welding area. These are available in different shapes and sizes. It consists of a wire pool holder, a drive motor, a set of drive rollers, and wire feed control. The wire feed speed is controlled by the current supply directly from the power source. If the wire feed speed is high, more current is required in the welding zone to generate the proper heat to melt it.
Other welding equipment with wire feeding
Generally, the wire feeding welding machine we often refer to is the MIG welding machine, but for example, TIG and laser can also perform wire feeding assisted welding. However, these welding methods can only perform wire feeding assisted welding under specific circumstances.
Introduction to wire feeding equipment
The commonly used wire feeding equipment for our MIG welding machine is divided into internal and external wire feeding devices. Generally, 250A welding equipment uses internal wire feeding devices, while equipment greater than 250A uses external wire feeding devices. However, it is very difficult to move our 250A industrial welding equipment every time, so there is an “arc pressure sensor wire feeder” that can realize remote adjustment of wire feeding speed.
The arc pressure sensing wire feeder is a special-purpose wire feeder in welding equipment. When connected to CC/CV MIG/MMA power source, it can realize gas shielded solid welding and flux-cored wire long-distance welding, while improving the weld quality. It is an indispensable welding equipment for shipbuilding, pipelines, etc. Arc pressure sensing technology is used to monitor the arc pressure changes during the welding process in real time and dynamically adjust the wire feeding speed to maintain the stability of the welding process and the welding quality (uniform and beautiful welds).
