Resistance
welding technology is widely used in manufacturing industry for joining metal
sheets and components.
BUTT
WELDING
The
meaning of butt is to place a work piece end to end without overlapping.
In
Butt welding the faces of the components are placed end to end, heated
electrically and pressed together.
INTRODUCTION
A
butt-welding joint is made by gradually heating up by using an electric current
to weld the two ends and then joining them under a specific pressure.
This process is very suitable for prefabrication and producing special fittings.
PROCESS
This process is very suitable for prefabrication and producing special fittings.
PROCESS
1.
In this welding process the one part of the work piece is held in a fixed clamp
and the other part of the same piece is held in a moving clamp.
2.
Let two rods be brought together such that they touch themselves.
3. Then heavy current is passed from the
welding transformer which creates the current flowing through the contact
resistance between the ends bringing them closer due to the weld. Since the
melting of carbon is higher than the rods, the clamps will not melt.
4.
Extra pressure is now applied, so that they are pushed into each other. Due to
pressure of the spring, molten metal is forced out producing bulged joint.
5.
Then, on disconnecting the supply, the rods cool and the weld is formed.
ADVANTAGES
1.
Butt welding joint is permanently leak proof and strong.
2.
The butt welding commonly have a smooth surface and gradual directional changes
3.
It will decrease the pressure losses and turbulence of the system, and protect
from the corrosion and erosion.
4.
The butt welding have a lower cost in budget.
5.
The butt welding joints have a smaller space in the system.
DISADVANTAGES
1.
The process is suitable for parts with similar cross sectional area
2.
Joint preparation is must for proper heating of work pieces to take place.
APPLICATIONS
1.
This method is used for welding rods, pipes, tubes, strips and wires.
2.
The materials which can be welded by this method are aluminum alloys, brass,
copper, nickel, stainless, low carbon and high carbon steels and gold.
3.
This method is highly used in making shopping trolley and metal basket.
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