CBN工具による高硬度鋼の旋削温度測定

概要

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The temperature of the flank side of the cutting tool edge that has large affect on machined surface integrity is measured using two-color pyrometer with a fused fiber coupler. The infrared rays radiated from the cutting tool edge are accepted by an optical fiber, and separated to two optical fibers at the fused fiber coupler. Each fiber leads the infrared ray, respectively, to two infrared detectors with different characteristic of spectral sensitivity. Temperature is obtained by calculating the ratio of the output voltage from these two detectors. A CBN tool (CBN content : 60 volume percent, density : 3000 kg/mm^2) is used as the cutting tool. Annealed steel (S45C), bcaring steel (SUJ2), and quenched steel (S55C) are used as the cutting materials to investigate their affect on the tool edge temperature. The results obtained are as follows : (1) The technique developed is suitable for measuring the temperature of the flank side of the cutting tool edge. (2) The temperature of the cutting tool edge is highly effected by cutting speed. (3) The temperature increases slightly with the increase of depth of cut and feed rate. (4) On the cutting of quenched steel which has the largest hardness among these three materials, the temperature is about 50℃ higher than that on the bearing steel cutting, and the temperature of the annealed steel cutting is the lowest.
1998-11-05