What is welding? What are the classifications of welding?

weldingIt is a process of heating, pressing, or combining two or more materials (usually metals) to cause melting or plastic deformation at the contact surface, thereby forming a firm connection. Welding is widely used in the manufacturing, repair, and assembly of various structures and equipment.

Classification of Welding

Welding methods can be classified according to different standards, and the following are common classification methods:

1. According to the type of heat source

· arc weldingUsing the high temperature generated by electric arcs to melt welding materials and base materials (such as manual arc welding, gas shielded arc welding).

· Gas weldingMixing combustible gases (such as acetylene) with oxygen to produce flames for melting welding materials (such as oxygen)-Acetylene welding).

· Laser weldingUsing the high energy density of laser beams to melt welding materials.

· Electron beam weldingUsing high-energy electron beams for welding in vacuum, suitable for high-precision welding.

2. According to the welding method

· Fusion weldingDuring the welding process, the base material melts, forming a weld seam (such as arc welding, gas welding).

· Pressure weldingConnecting by applying pressure to cause plastic deformation of the base material (such as spot welding, forging welding).

· BrazingUse filling materials lower than the melting point of the base material for connection, without melting the base material (such as silver brazing, aluminum brazing).

3. According to the welding environment

· Indoor weldingWelding carried out in workshops or specialized welding environments.

· Outdoor weldingWelding carried out on-site or outdoors usually requires consideration of factors such as weather.

4. According to the welding material

· Metal weldingMainly welding metal materials such as steel, aluminum, copper, etc.

· Plastic weldingWelding plastic materials usually uses methods such as hot air or ultrasonic waves.

5. According to the welding process

· Manual weldingManually control the welding process by the operator (such as manual arc welding).

· automatic welding Use automated equipment for welding (such as robot welding).

· Semi-automatic weldingCombining manual and automatic welding methods.

summary

Welding is an important manufacturing process widely used in various industries. Different welding methods and classifications are suitable for different materials and application requirements. Choosing the appropriate welding process can improve welding quality and efficiency.