Tool–Chip Interface Temperature Measurement in Interrupted and Continuous Oblique Cutting

Abstract

The objective of this work is to fabricate instrumented cutting tools with embedded thermocouples to accurately measure the tool–chip interface temperature in interrupted and continuous turning. Thin-film thermocouples were sputtered directly onto the flat rake face of a commercially available tungsten carbide cutting insert using micromachined stencils and the measurement junction was coated with a protective layer to obtain temperature data 1.3 μm below the tool–chip interface. Oblique interrupted cutting tests on AISI 12L14 steel were performed to observe the influence of varying cutting speeds and cooling intervals on tool–chip interface temperature. An additional cutting experiment was conducted to monitor the interface temperature change between interrupted and continuous cuts.

New In Situ Imaging-Based Methodology to Identify the Material Constitutive Model Coefficients in Metal Cutting Process

“…Although fabricate instrumented cutting tools with embedded thermocouples were developed to accurately measure the toolchip interface temperature [23], the direct measurement of temperature inside the primary zone is still a challenge. Taking this challenge into account, the temperature is computed by equating overall temperature rise of the material in moving through the primary shear zone and the total plastic work in the primary shear zone [24].…”

Optimal fabrication of a thin-film thermocouple (TFTC) using Alumel/chromel junctions

“…The strategy for protecting TFTC sensors from extreme friction and temperature is a great challenge because of the damage imparted to the thin-filmed sensor during cutting processes. Kesriklioglu et al [ 18 ] embedded a K-type thermocouple TFTC. In their study, an AlTiN layer coated the upper side on layers of Chromel and Alumel to protect the TFTC sensor.…”