Abstract
We think electric-discharge cutting of metals to be as follows ; The conditions of electric currency, contact pressure of the pole on the work, surface speed of the pole, and machining fluids working together, change the frequency of arc discharge or the electric energy for each arc. Then the frequency of arc discharge or the electric energy for the arc influence over the cutting speed or machining efficiency.We got many electromagnetic oscillograms of voltage waves in electric-discharge cutting for each value of surface speed and contact pressure. And by comparing these with the practical cutting results, we found not only the fact above-mentioned but also a fact that the eccentricity of electrode takes an important part, and others.
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