Machining Performance of Rotary Tool on Multi Tasking Lathe(3rd report)

Measurement of cutting temperature by tool-work thermocouple

Abstract

Cutting point temperature and tool wear during a driven rotary cutting of SUS304 stainless steel was examined in this report. A rotary tool is attached to a milling spindle on a multi tasking lathe which has B axis control. Different from a self-propelled rotary tool, the driven rotary tool can widely control the tool rotation speed. We measured the cutting temperature by using tool-work-thermocouple method with varying the circumferential velocity of tool. Measured cutting temperature was 1100˚C or more by using a non-rotation tool. However, by a rotary cutting, cutting temperature was 1000˚C or less. Cutting point temperature tends to decrease with the increase of tool circumferential velocity. The magnitude of tool wear almost corresponds to the cutting point temperature.