Classification Of Laser Arc Composite Welding

Classification Of Laser Arc Composite WeldingLaser self fusion welding
The welding method of using arc heat as a heat source is called “arc welding“. In arc welding, a positive voltage is applied to the electrode (welding rod or wire) and a negative voltage is applied to the base metal. This will generate an arc from the base material to the electrode.

Submerged arc welding is not easily affected
In principle, the traditional welding method of submerged arc welding, which can only be welded manually, is also known as “manual welding”.

Covered arc welding is a type of electrode consumption (electrode melting) arc welding method, which uses a metal rod (covered arc welding rod) of the same material as the base material as the electrode and the arc formed between the core wire and the base material as the heat source. The gas generated by the core wire coating and the glassy welding slag cover the dissolved metal for welding. The protective layer composed of the gas and welding slag, as well as the formation of a coverage area at the top of the welding rod, have the advantage of not being easily affected by wind and other conditions at the welding site.

Low operating cost of plasma welding
Plasma welding is a welding method that generates a plasma arc between the electrode and the base material, and uses it for welding. It belongs to the non electrode consumable welding method, which, like TIG welding, uses a tungsten rod as the electrode. Its characteristic is that it can use a nozzle that covers the electrode and plasma gas to gather the arc and prevent diffusion.

Good heat collection and neutrality can achieve welding with narrow, high-speed, and low distortion welds. High arc directionality, suitable for fillet welding without sputtering. Low electrode consumption allows for long-term high-quality welding. Although the price of this welding machine itself is higher than that of TIG welding machine, its operating cost is lower. This is also one of the most suitable welding methods for automatic welding.

Gas electric vertical welding (EGW) has good welding effect
Gas electric vertical welding (EGW) is developed for achieving thick plate welding with high power and stable integration in the vertical direction, and belongs to the electrode consumption welding method. In most cases, EGW uses carbon dioxide gas as a protective gas, but sometimes pure argon, argon carbon dioxide mixture, argon oxygen mixture, and argon helium mixture are also used. Welding wires often use flux wires that can form welding slag and have a beautiful weld appearance, but sometimes solid core wires are also used. Welding power sources usually use DC voltage stabilizing characteristic power sources or DC current stabilizing (drooping) characteristic power sources.

Surrounding the molten pool with base metal end and copper lining or refractory lining material can prevent molten metal from dripping while conducting upward vertical welding, thus enabling thick plate welding in a single pass (single operation).

Its advantages include the use of high current, faster deposition speed, and the ability to perform high-power welding. At the same time, due to small angular deformation, it has a relatively large margin compared to groove accuracy. Its uses include welding vertical joints on ship side panels, bridge construction, storage tanks, pressure vessels, and other vertical directions.

Laser arc composite welding improves the stability of the welding process, achieves efficient and low-cost welding, and improves welding quality.

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