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Hole is to be cut in block of pure iron

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Question

A 88mm diameter through-hole is to be cut in a block of pure iron (Valence = 2) by electrochemical machining. The block is 50mm thick. To speed the cutting process, the electrode tool will have a center hole of 75mm in which will produce a center core that can be removed after the tool breaks through. The outside diameter of the electrode is undersized to allow for overcut. The overcut is expected to be 0.125mm on a side. If the efficiency of the ECM operation is 90% and take C = 3.68 x 104 mm:/A-s, what current will be required to complete the cutting operation in 20 minutes? (2101A).

Reference no: EM133294230

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