A 3.5 in diameter through hole is to be cut in a block of pure iron (Valence = 2) by electrochemical\nmachining. The block is 2.0 in thick. To speed th
A 3.5 in diameter through hole is to be cut in a block of pure iron (Valence = 2) by electrochemical
\r\nmachining. The block is 2.0 in thick. To speed the cutting process, the electrode tool will have a
\r\ncenter hole of 3.0 in which will produce a center core that can be removed after the tool breaks
\r\nthrough. The outside diameter of the electrode is undersized to allow for overcut. The overcut is
\r\nexpected to be 0.005 in on a side. If the efficiency of the ECM operation is 90%, what current will
\r\nbe required to complete the cutting operation in 20 minutes?