2021 年 6 巻 p. 59-64
Recently, as the demand for high-strength parts has increased, there is a growing need for processing techniques for difficult-to-cut materials. Studies have been conducted to improve the workability of the workpiece by adding heat just before cutting and increasing the temperature at the cutting point. Lasers are often used for heating, which require secure safety measures and large-scale devices. Therefore, in this study, to improve the cutting efficiency by preheating with a simpler device, a discharge assisted cutting method was proposed. In the proposed cutting method, preheated cutting is performed by heating the cutting point by electrical discharge just before cutting. As a result of the discharge assisted cutting experiments, it was found that the machining point of the workpiece was softened by the heating of the discharge, and the surface roughness after machining could be improved by the proposed discharge assisted cutting. Therefore, we can conclude that the proposed discharge assisted cutting is useful for improving the machined surface properties.
