Research On Micro-EDM Deposition Technique And Experiments In Gas

Micro-electrical discharge machining is one of extremely important process in the field of micro-manufacturing. Micro-EDM is a non-contact machining technique because of no macro-force existing on work piece in the process. Micro-EDM can manufacture work piece with small machining unit and can be controlled well, so it has irreplaceable advantages in manufacturing parts with micro-dimension. Through selecting the reasoning parameters, electrode materials can be fabricated on the work piece, which is a great breakthrough to the traditional machining techniques, and while the technique, enlarges the intention of EDM. It is broken through the limit of knowledge on this field in the last years and it has great significance on the development of the Micro-EDM .The research mainly includes following aspects:Firstly the paper summed up the development and the fruit of the Micro-EDM. Then summarize the rational electrical parameters and processing parameters of micro-EDD when using brass electrode in the gas. Design the instruments of the against-gravity EDD in the air and deposition in the argon gas. Polarity, working fluid, electrode thermodynamic character and energy distribution between electrodes that affect the result of micro-EDD are discussed. Secondly, further research is going through when using brass as the anode and steel as the cathode. The experiments of against-gravity Micro-EDD in the air, against-gravity Micro-EDD in the air with a certain angle and Micro-EDD in the argon gas have been made on the DP30 machine. Eventually, the micro-structure and micro-hardness of deposition materials are tested and analyzed. Using the spectroscopy analysis, the state of substance existed in the deposition materials are further confirmed.