welding and joints

welding and joints

                    welding and welding joints

Definition

 

To join by applying heat sometimes with pressure and

 some time with an intermediate or a filler metal 

having a high melting point

A welding joints is a permanent joints use 

extensively in fabrication process . An electronic process for fusion welding arc or gas welding is use for fusion of the martial 

Classification of welding

1)Fusion welding

2)Forge welding

1)Fusion welding

In this process the parts to be joined in proper 

position while the molten martial Is supplied to the

 joint. By heating the joints surface become plastic 

molten. when the molten melt the joints is formed

2)Forge welding

 In this type of welding the parts are first heated to a 

proper temperature in a furnace or forge and then 

hammered.

Classification of fusion welding

1)Gas welding

a)Air acetylene

b)Oxy acetylene

c) Oxy hydrogen welding

2)ARC Welding

a)Carbon arc welding

b)Plasma arc welding

c)Shield metal arc welding

d)T.I.G Tungsten inert gas

e)M.I.G Metal inert gas

3)Resistance welding

a)Spot welding
.

b)Seam welding

c)Flash butt welding

4)Solid state welding

a)Cold welding

b)Forge welding

c)Hot pressure welding

d)Roll welding

Welding joints

We used different types of welding joints butt lap T 

joints etc

In but joint we used different  types of bevel