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Heat distribution in spot welding
Besides the resistance at the interface, there are six other resistance through which the same welding current is passed. They are:
Therefore, some amount of heat is generated in these regions also (equal to I2 x R x t).The effective heat that is utilised is that due to the resistance at the metal - metal interface only, the others being losses.Among the above six resistance, R2 and R5 are high compared to the other four. These two can be minimised by properly choosing the electrode pressure and cleaning the surface well.
Gas Porosity Porosity is the presence of gas pockets or voids caused by the entrapment of gas evolved during weld metal solidification. This Porosity is caused due to im
A cantilever beam is loaded with a concentrated. Force of 5kN at the free end. The length of the cantilever beam is 1m having cross section of 50×50mm. determine the equation for b
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A rotor has the given properties : If the shaft is balanced by two counter masses located at 100 mm radii and revolving in planes midway of plan 1 and 2 and midway of 3 and
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Welding transformer The resistance welding transformers step down the line tune of 2 to 20 V. The primary is connected to the line supply and is made from edge bent copper stri
Characteristics of a project
Q. Combustion Chamber and Radiant Section? The combustion chamber and the radiant heat transfer section of the Steam Generators shall be a horizontal, multiple pass arrangement
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