Laser beam welding (LBW)

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GHARIA PRADIP SINH.G
096470319100
GUIDED: M.M.K
Laser beam welding (LBW) - the heat from laser
can be used to heat the surface of material or
penetrate the entire depth of the joint (good for thin
gauge metals). The major problems with the current
lasers lie in the cost and bulk of the power source.
High Energy Density Processes
shielding
gas nozzle
(optional)
Laser beam
Plasma plume
Plasma
keyhole
Keyhole welding
workpiece motion
Molten
material
WORKING PRINCIPLE
In laser beam ruby laser are most likely in
case of ruby . Its chromium atom is formed
from its ground level to higher level by a
using an external force which excites the
atoms when this energy is absorbed the
electrons increase their spin & expand their
orbit . this exited state is short lived and
atoms drops back to at immediate level in
which atoms losses is heat energy .
Laser Beam Welding
Uses a laser beam to melt the metals; can be used for deep, narrow welds
Laser Weld Advantages
•Deep narrow welds
•Low heat input
•Minimal distortion
•High joint completion rates
•Joint design flexibility
•Minimal use of consumable
•Ease of automation
LASER WELDIND DISADVANTAGES
• Welding speed is very slow .
• It is limited up to the depth of 1.5 mm.
• Mat like mg tend to vaporize .
APPLICATIONS
• To join hard & high melting point metal alloy.
• For joining the metals like copper, nickel, al,
etc
• It is also used for micro welding purposes.
• To joint & prepare joint ele part integrate
circuit.
• For welding like gauge mat in space & aircraft
ind.
THANK YOU
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