What are the categories of welding methods?

Welding methods can be classified into the following four categories: 1. According to heat source: fusion welding and solid state welding; 2. According to protective medium: protected welding and unprotected welding; 3. According to the degree of automation: manual welding, semi-automatic Welding and automatic welding; 4. According to application areas: arc welding, gas welding, brazing and friction welding.

Classification of welding methods

Welding methods can be classified into the following categories:

1. Classification by welding heat source

• Fusion welding: The heat source is used to melt the workpiece to be welded, and filler metal is added to form the weld. Common methods include arc welding, gas welding, plasma arc welding, etc.
• Solid state welding: Do not melt the workpieces to be welded, but use diffusion or heating and softening to connect the workpieces together. Common methods include brazing, friction welding, cold welding, etc.

2. Classification by protective medium

• Shielded welding: During the welding process, the weld area is protected by protective gas, coating or flux Cover to isolate oxygen and impurities. Common methods include tungsten inert gas shielded welding, gas metal arc welding, etc.
• Unprotected welding: During the welding process, the weld area has no protection means and is directly exposed to the atmosphere. Common methods include manual arc welding, gas welding, etc.

3. Classification by degree of automation

• Manual welding: The welder manually controls the welding process.
• Semi-automatic welding: The welding equipment automatically feeds wire or shielding gas, and the welder controls the wire filling angle and speed.
• Automatic welding: The entire welding process is controlled by a computer or automatic control device, and the welder only participates in loading and unloading workpieces.

4. Classification by application fields

• Arc welding: mainly used for metal structures, pipes, containers, etc.
• Gas welding: mainly used for welding thin plates, pipes, and special-shaped workpieces.
• Brazing: Mainly used for connecting low melting point metals, such as electrical appliances, electronic components, etc.
• Friction welding: Mainly used for metal connections in automobiles, aviation and other industries.

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