Research On Electrical Discharge Machining With Electrode Planetary Movement And Fuzzy Control

Micro electrical discharge machining plays a vital role in manufacturing methods with its character of non-contact and etc.In the tiny hole machining and other special environment,traditional EDM process will appear to the large number of accumulation of the discharge product which results in the short circuit,arc and secondary discharge phenomenon,even seriously hindered the normal processing.Based on the research of the mechanism of electrode orbital movement process and traditional shaking processing technology,this paper proposes a way to improve the efficiency of the machining process through changing the electrode orbiting speed.In this dissertation,the fluid simulation based on Fluent software is used to analyzing the influence of the electrode orbital movement speed and radius.It turned out that higher speed and larger radius of electrode orbital movement speed can leads to the improvement of the debris number which outside of the hole.Also,it can be seen that the electrode orbital movement can lead to the speed of working fluid exchange.This dissertation also analyzes the negative effects of the electrode orbital movement in order to improve the machining accuracy through the optimization of electrode orbiting tracks.Based on the analysis on Fluent fluid simulation,this dissertation establishes an fuzzy controller with two inputs and two outputs which are voltage deviation,change rate of it,speed of electrode orbital movement and speed of Z axis.Also,the dissertation simulates the fuzzy controller on fuzzy logic toolbox to improve the parameter of the subordinating degree function and outputs.As the fluid simulation results,this dissertation has carried on the multiple sets of processing and comparative experiments.The experimental results show that increasing the radius or speed of the electrode orbital movement can improve the efficiency of the mirco EDM as well as narrow the relative electrode loss.The dissertation has carried on the contrast experiments of two processing ways which are fuzzy control with electrode orbital movement and the jump control method.The experimental results show that fuzzy control with electrode orbital movement shows the advantages of good adaptability and stability.