Research On Conductive Engineering Ceramics Electrochemical Discharge Perforation Technology Based On The Combination Of The Positive And Negative Pulse Power

Engineering ceramics are gotten more and more attention by researchers in the advanced scienceand technology, because of its special performance, such as strength, high hardness, wear resistanceand corrosion-resistant. However, its many fine features can not be effectively utilized as theprocessing is much more difficult than metal, so need to develop efficient, precision ceramicprocessing and new technology. In the past two decades, researchers explored many processing, suchas EDM, laser machining and ultrasonic machining, in machining the non-conducting engineeringceramics, but the problem of them is low processing efficiency. In this paper, on the basis of absorbingthe research results of domestic and foreign scholars, the author innovatively propose the research ofconductive engineering ceramics ECDM perforation technology based on the combination of thepositive and negative. The main contents as follow:(1) On the basis of ordinary ECDM, it analysis the principle of ECDM based on the combinationof positive and negative pulse power, the physical process of material corrosion and the distribution ofprocessing power. From the perspective of improving the energy efficiency, this theory that have beena waste of energy for the electrolysis of gas stored in the discharge burning in the form of anexplosive instant re-use them. It can greatly improve material removal rate compared with theconventional ECDM. Last, from the macro the ECDM process has been analyzed.(2) Based on the model of metal materials EDM, it established a non-conductive ceramic ECDMengineering model. In order to verify ECDM model, it has studied electrochemical discharge voltagecharacteristics, which is divided into four stages: the linear region, the up region, the fall region andthe stable region.(3) Based on insulation coating component, it has designed the test equipment of ECDM hole,whose machining principle and three processing states have been analyzed. It also made specificprocessing strategies. Research by the electrical parameters and the relationship between the holesdiameter, and as the basis for processing a hole whose diameter is1.400mm.(4) The high efficiency of ECDM technology based on combination of positive and negativepulse power is proved by experiment. Various parameters on the zirconia ceramic material removalrate are also researched.