精密工学会 = The Japan Society for Precision Engineering
抄録
タッピングは加工の最終工程に行われるため,タップが折損して製品に取り残されるなどの失敗は許されない.折損が発生する主な原因は工具摩耗である.したがって工具摩耗に大きな影響をおよぼす工具刃先温度の測定は重要である.しかし,タップ加工の温度測定に関する研究はほとんど行われていないのが現状である.そこで本研究では2色温度計を用いた加工温度測定システムの確立を試みた. In this study, the method for measurement of the tool edge temperature in tapping was proposed. The tool edge temperature was measured using the two- color pyrometer with an optical fiber. In addition, the vibration caused by tool edge-work piece contact was sensed by an acceleration pickup. Experiments were performed using TiN coated HSS-spiral tap (M10×1.5). As a result, the temperature outputs from tool edges and chips were able to be distinguished. In tapping of S45C-BN at cutting speed 30 m/min, the maximum tool edge temperature is about 400 oC. The tool edge temperature was increasing with cutting aria.