Self-sensing of cutting temperature in single point diamond turning by a boron-doped diamond tool

Cutting temperature is important in single point diamond turning. However, the challenge of measuring temperature in single point diamond turning is locating a sensor at the cutting edge during machining. This paper presents a tool system having a capability of measuring cutting temperature in diamond turning by the tool itself without any additional temperature sensors. A diamond tool was doped with boron via high temperature and high pressure treatment, by which the tool becomes a P-type semiconductor and thus have a thermal-sensitive characteristic for indicating the cutting temperature at the cutting edge zone during diamond turning processes.