A resistance seam welding operation is performed on two pieces of 5 mm thick aluminium sheet. The specific melting energy for aluminiumis 2.9 J/mm3. The process parameters are: current = 6000 A and welding duration = 0.3 s, interface resistance = 75 μ0. The electrodewheels have a diameter of 250 mm. The individual weld nuggets formed are 6 mm in diameter and 3 mm thick. Assume the weld nuggetsare cylindrical in shape and are continuous to form a sealed seam. The power unit driving the process requires an off-time between spotwelds of 1 s. The fraction of energy generated that goes into the formation of each weld nugget and the rotational speed (in rpm) of theelectrode wheels is

given:thickness t=5mmE=2.9J/mm3current I=6000At=0.3secdw=6mmtw=3mm

Answered: ndividual weld nuggets formed are s to…

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ndividual weld nuggets formed are s to form a sealed seam. The powe ated that goes into the formation of

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

A resistance seam welding operation is performed on two pieces of 5 mm thick aluminium sheet. The specific melting energy for aluminium
is 2.9 J/mm3. The process parameters are: current = 6000 A and welding duration = 0.3 s, interface resistance = 75 μ0. The electrode
wheels have a diameter of 250 mm. The individual weld nuggets formed are 6 mm in diameter and 3 mm thick. Assume the weld nuggets
are cylindrical in shape and are continuous to form a sealed seam. The power unit driving the process requires an off-time between spot
welds of 1 s. The fraction of energy generated that goes into the formation of each weld nugget and the rotational speed (in rpm) of the
electrode wheels is

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