Study on the Electric-Discharge Grinding (2nd Report)

On the Stock Removal Rate

Abstract

The stock removal rate in the electric-discharge grinding (R-C circuit) was studied experimentally under various electrical conditions. The results are as follows:
(1) The stock removal rate is proportional to the maximum electric-discharge power and increases as the capacity of the condenser becomes larger.
(2) The experimental formula of the stock removal rate M is given by
M = KCⁿE²R^-1(0<n<1)
where C : capacity of condenser, E : source voltage, R : charging resistance, K and n : experimental constant.
(3) The removal rate is influenced by the work material and increases in the order of tungsten carbide, high speed steel and carbon steel.
(4) When using a cast-iron wheel electrode, it is better that either tungsten carbide is connected with the anode, or high speed steel or carbon steel is connected with the cathode.