Abstract
Cutting point temperature and tool wears during a driven rotary tool was examined in this paper. Dry and MQL tests of stainless steel (SUS304) were carried out. We measured the cutting point temperature by using tool-work-thermocouple method and tool wears of rake face and flank face by using microscope. Then, the cutting speed was varied from 100m/min to 500m/min. Cutting point temperature tends to increase with the increase of cutting speed. At high speed cutting (500m/min), cutting point temperature was over 1200℃ in non-rotation tool. However, by using driven rotary cutting, cutting point temperature was decreased to 1000℃. In addition, by using driven rotary cutting with MQL, cutting point temperature was decreased to 900℃. In rotary cutting, cutting fluid can be delivered to tool-chip and tool-workpiece interfaces. The magnitude of tool wears almost corresponds to the cutting point temperature.
