The principle, characteristics and application scope of common welding methods

Gas welding principle of spot welding machine
Use the flame heat of combustible gas and oxygen to melt the weldment and welding wire for welding.
Features: Flame temperature and nature can be adjusted, heat is not concentrated enough, heat affected zone is wider, and productivity is low.
Scope of application: Used for welding thin plate structures or small parts. Weldable steel, cast iron, aluminum, copper and its alloys, cemented carbide, etc.

Principle of electrode arc welding
Use the arc heat between the electrode and the weldment to melt the electrode and the weldment for welding.
Features: Exciting, flexible, adaptable, and can be welded in all positions. The beam spot is simple and durable, and the maintenance cost is low. The labor intensity is high, and the welding quality is affected by the skill level of the workers and is unstable.
Scope of application: It is the most practical in single-piece, small batch production and maintenance. It can weld carbon steel, low-alloy steel, stainless steel, copper, aluminum and other non-ferrous metals over 3mm, as well as cast iron.

Principle of submerged arc welding
Use the arc heat between the welding wire and the weldment to melt the welding wire and the weldment for mechanized welding, and the arc is covered with flux to isolate it from the outside world.
Features: The feeding and moving of the welding wire relies on machinery, with high productivity, good and stable welding quality, no overhead welding and vertical welding, and good working conditions.
Scope of application: Suitable for large and batch production of medium and long straight or circular welds. It can weld carbon steel, alloy steel, some copper alloys and other medium and thick plate structures. It can only be flat welding, horizontal welding, horizontal fillet welding

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