Abstract
Among the numerous applications of electrical discharge machining (EDM) in industry, drilling of fairly small holes (0.75–2.0 mm) in hard-to-machine alloys (e.g. high speed steel) and small holes (< 0.75 nm) in even soft metals (e.g. copper) is an important aspect. In the work reported, small holes were drilled in high carbon steel plates of varying thickness, using copper wire of diameter ranging from 0.19–0.71 mm, as the tool electrode. The discharge voltage was varied from 80 to 160 V and the circuit capacitance from 0.1 to 0.6 μF. The results were correlated to give a formula for overcut in terms of discharge voltage, circuit capacitance, diameter of the tool and the depth of the hole. Another correlation was obtained between the taper in the hole produced and the diameter of the tool and the depth of the hole.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
