Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 10 Oct 2017 My Price 4.00

ramp function

An experimental power source for spot welding is de-signed to deliver current as a ramp function of time: 1= 100,000 t, where f = amp and t = sec. At the end of the power-on time, the current is stopped abruptly. The sheet metal being spot welded is low carbon steel whose unit melting energy =10 limm3. The resistance R = 85 micro-ohms. The desired weld nugget size is: diameter = 4 mm and thickness = 2 mm (assume a disc-shaped nugget). It is assumed that 1/4 of the energy generated from the power source will be used to form the weld nugget. Determine the power-on time the current must be applied in order to perform this spot-welding operation.

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Maurice Tutor
(5)
Status NEW Posted 10 Oct 2017 08:10 PM My Price 4.00

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