2017
Machinery/Automation/Robotics
Expulsion is the molten metal ejected from the nugget under pressure, burning in the air with bright light and loud noise. Because the loss of liquid metal from the nugget expulsion always produces poor quality weld and it also consumes more than three times the energy needed to make a low temperature solid state weld.
In India thousands of railways travel everyday from one destination to another. The engine is the most important device of railway and it works on the principle of conversion of heat energy into mechanical energy.
A large amount of heat is dissipated through the fins from the engine when it starts and runs.
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