抄録
This paper proposes a new technology method to deposit tool electrode materials on workpiece in air, which breaks through the constraint of traditional EDM. At first, the basic discharge condition to realize this method is expatiated by heat transfer analysis between electrode and workpiece, and then the experiments were carried out on a die-sinking EDM machine tool. Based on a lot of experiments, the processing laws of micro EDM deposition is systematically and thoroughly studied by analyzing the main machining parameters' effect on deposit. Finally, adopting brass wire as tool electrode on the surface of high-speed steel workpiece, the micro cylinder (0.2mm in diameter, 7.35mm in height) can be achieved. And with a certain machining parameters, the deposit with spiral structure can be obtained. The properties of the deposit, such as structure, hardness and so on, were obtained by SEM, X-ray diffraction and other instruments.
