A square hole is to be cut using ECM through a plate of low alloy steel...
(A) (SI units) In an ECM operation the frontal working area of the electrode is 1555 mm2. Applied current = 1200 amps and voltage = 12 volts. The material being cut is nickel (valence = 2). Consult Table 25.1 for the specific removal rate of nickel. (a) If the process is 90% efficient, determine the rate of metal removal in mm3/min. (b) If the resistivity of the electrolyte = 150 ohm-mm, determine the working gap.