Welding

Welding can be defined as the process of joining similar metal by the application of heat ,with or without the application of pressure and filler metal.in such way that the welded component is continuity o homogeneous material having the sane composition and characteristic as the two part to be joined together.the cast of welding is very less as compared to the other metal joining process like riveting,nut-bolts and form of a spong joint.

Types Of Welding
1)Fusion Welding
In Fusion Welding ,initially the temperature of parent metal is raised up to the melting point then filler metal is used as suppliment for molten pol.A Homogeneous mixture is formed at the joint then it is allowed to solidify to form a weld.

2)Pressure Welding
The ends to be joined as brought to plastic stat and then apply external pressure to joint them.