Question

.     The time of a resistance spot weld is measured in cycles of 60 Hz electric current.
o   Estimate the depth to which a copper electrode is heated by conduction from the steel sheet in a 12 cycle weld. The thermal diffusivity of copper is 0.9 cm2/sec.
o   The electrode has internal water cooling. The distance from the electrode-sheet interface to the water cooling channel is 7 mm. In a robotic welding application, welds of 12 cycle duration are made at a rate of 40 welds per minute. Is the water effective in cooling the end of the electrode during this process​

Answer 1

Answer:

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Explanation:

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