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

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

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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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
Transcribed Image Text: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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