Experimental Study on Electrode Wear of Diamond-Nickel Coated Electrode in EDM Small Hole Machining

Abstract

Aiming at the problem of obvious tool length wear and side wear in the small hole processing of EDM the nickel-coated composite electrode and diamond-nickel-coated composite electrode were prepared by chemical composite coating using brass copper molybdenum and copper-tungsten alloy materials as the matrix material. Comparative experiments of EDM small hole machining using composite tools were carried out on die steel. The effects of nickel-coated composite electrode and diamond-nickel-coated composite electrode on tool length wear tool side wear and tool shape change were analyzed. The results show that the diamond-nickel-coated composite electrode can effectively reduce both the length wear and side wear of the electrodes.