WELDING

WELDING (WELL)

Common

Welding is a process that produces the material blend of materials by heating them appropriate temperature with or without the application of pressure or by the application of pressure alone , and with or without the use of fillers to join.

Types:

Plastic Welding or Pressure Welding

The piece of metal to be joined are heated to a plastic state and forced together by external pressure Resistance welding 

Fusion Welding or Non-Pressure Welding

The material at the joint is heated to a molten state and allowed to solidify
Gas welding, Arc welding

Classification of welding:

1. Arc welding
2. Gas Welding
3. Resistance Welding
4. Thermit Welding
5. Solid State Welding
6. Newer Welding
7. Related Process

• Arc welding 

1. Carbon arc 
2. Metal arc 
3. Metal inert gas 
4. Tungsten inert gas 
5. Plasma arc 
6. Submerged arc 
7. Electro-slag 

• Gas Welding

1. Oxy-acetylene 
2. Air-acetylene 
3. Oxy-hydrogen 

• Resistance Welding

1. Butt 
2. Spot 
3. Seam 
4. Projection 
5. Percussion 

• Thermit Welding

• Solid State Welding 

1. Friction 
2. Ultrasonic 
3. Diffusion 
4. Explosive 

• Newer Welding

1. Electron-beam 
2. Laser 

• Related Process

1. Oxy-acetylene cutting 
2. Arc cutting 
3. Hard facing 
4. Brazing 
5. Soldering