微細放電加工の研究 (第2報)
加工機の製作と加工実験
1994 年 28 巻 58 号 p. 38-48
詳細
1994 年 28 巻 58 号 p. 38-48
A micro-electrodischarge machine with 3-axis numerical control was developed. The measured discharge gap was less than 1μm in the range of low discharge energy. It was clarified that higher rotating speed of the electrode is preferable in machining with respect to machining time and surface finish. The optimum voltage range was 70 to 100V, and it is preferable to choose higher voltage for shorter machining time and lower voltage for better electrode consumption and accuracy. A better surface finish was obtained with smaller condensor capacitance, and the minimum surface roughness was Rmax 0.1μm. The surface finish was not influenced by voltage.
A shaft-making machine using the principle of wire electrodischarge grinding (WEDG) was also developed. A better surface finish and accuracy was obtained with spark-out, and a shaft with 5μm diameter was successfully machined.
