Research Of The Debris Exclusion In Micro-hole EDM And The Development Of Micro-hole EDM Vibration Table

With the development of technology, parts with micro-hole have been widely in aviation, aerospace, automotive, medical equipment and other important industries. Micro-EDM has the advantages of non-contact processing, no macroscopic cutting force, and low requirement of strength and stiffness of the tools, wide material application range, is especially suitable for micro-hole processing method. However, this method also has its own drawbacks, that is its machining gap is extremely subtle and its processing explosive force is very small, electric erosion products is hard to exclude, electric erosion products deposited on the processing of the content could easily lead to short-circuit the gap. Greatly reduce the processing stability, easy to produce secondary discharge phenomenon. In order to improve the debris exclusion phenomenon, a series of researches are carried out in this paper.In chapter two we conducted a simulation focus on debris using fluid dynamics method and established a fluid dynamics model.Then the debris excluding phenomenon under the conditions that there is only electrode rotation, there is only electrode vibration, there are electrode rotation and vibration, there is only work piece vibration, there are electrode rotation and work piece vibration has been studied using software FLUENT. Simulation results show that, under the condition that there are electrode rotation and work piece vibration, the debris excluding phenomenon is the best.In this paper, a giant magnetostrictive actuator is designed and built using as the vibration table of the micro-hole EDM to aid the process of EDM debris exclusion, and create an ideal discharge environment, enhance discharge probability, thereby increase the machining efficiency.Experiments are carried out to test about the static and dynamic characteristics of the giant magnetostrictive vibration table in this paper, so that do prepare for the next research. In the micro-hole EDM processing experiments, the processing time under the working condition that there is no electrode rotation none work piece vibration, there is only electrode rotation, there is only work piece vibration, there are electrode rotation and work piece vibration are compared. Through the experimental results, we can find the best processing condition, and proof the simulation result. At last, the experiment about the relationship between vibration frequency and working efficiency is carried out. The experiment results show that the higher vibration frequency, the shorter the working time, that is the higher working efficiency. So to increase the work piece vibration frequency is an effective mean to improve the working efficiency.