Sutdy On The Mechanism Of Spark-induced Atomization Ablation Milling And Electrode Wear

Electric spark induced atomization ablation milling technology is an efficient EDM technology.In order to study the erosion mechanism and the electrode wear law of the spark-induced atomization ablation milling,this topic selects the milling method,using atomization EDM Ablation technology(water,oxygen atomization medium)and atomization EDM technology(water,argon atomization medium)for comparative experiments.Distinguish between the discharge erosion portion and the combustion erosion portion.The erosion mechanism and the electrode wear law of ablation processing are described from the perspectives of discharge probability and combustion efficiency.The main work of this topic is as follows:(1)Improved the experimental processing platform.Optimize the atomization experiment system and control the liquid pressure using a dual valve.Ensure the consistency of the aerosol medium in the single factor comparison experiment.(2)Completed the comparative experiment of atomization EDM Ablation and atomization EDM.The results show that the discharge probability of EDM Ablation is higher than that of EDM,and the short circuit probability of EDM Ablation is lower than that of EDM.Based on the single pulse comparison experiment,the separation principle and formula of the discharge part and the combustion part in the atomization ablation process are proposed.(3)The effects of electrical and non-electrical parameters on the ratio of the combustion portion to the discharge portion were studied.The results show that the ratio of the combustion part to the sparking part will change regularly with the change of various parameters during the ablation process.(4)The reasons why EDM Ablation technology can maintain high efficiency compared with traditional EDM technology are proposed.First,the products produced by ablation processing can improve the inter-electrode processing state,increase the probability of spark discharge,and improve the utilization rate of the EDM energy.Second,the introduced oxygen reacts with the activated metal to burn,introducing the efficiency of the combustion part,thereby improving the overall efficiency.(5)The methods for reducing the electrode wear is proposed.First,through parameter optimization,the proportion of the burning part is increased,and the proportion of the spark portion is reduced,thereby reducing the electrode wear caused by the spark discharge.The second is to use a high melting point electrode material to reduce the electrode wear caused by the combustion part.