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Measurement of Cutting Temperature in Interrupted Machining Using Optical Spectrometry.

Isaí Espinoza-Torres1, Israel Martínez-Ramírez1, Juan Manuel Sierra-Hernández2

  • 1Departamento de Ingeniería Mecánica, División de Ingenierías, Campus Irapuato-Salamanca, Universidad de Guanajuato, Carretera Salamanca-Valle de Santiago km 3.5+1.8, Comunidad de Palo Blanco, Salamanca 36885, Mexico.

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Summary
This summary is machine-generated.

This study developed a precise ratio pyrometer system for measuring cutting tool flank temperatures during high-speed milling. The system accurately measures temperatures up to 518°C, proving effective for machining processes.

Keywords:
calibration systemcutting temperaturemillingratio pyrometer

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Area of Science:

  • Materials Science and Engineering
  • Manufacturing Technology
  • Metrology

Background:

  • Accurate measurement of cutting tool temperature is crucial for optimizing machining processes and tool life.
  • Traditional methods for measuring cutting temperatures face challenges with accuracy and real-time application, especially at high cutting speeds.
  • The cutting tool flank temperature directly influences tool wear and surface quality.

Purpose of the Study:

  • To develop and validate an experimental system for measuring tool flank temperature during high-speed up-milling.
  • To investigate the influence of cutting parameters on cutting temperature.
  • To demonstrate the effectiveness and precision of a novel ratio pyrometer system.

Main Methods:

  • A ratio pyrometer utilizing two photodetectors and a fiber-optic coupler was designed to capture radiation from the cutting insert.
  • An innovative calibration system was developed, replicating the milling process to generate a calibration curve and account for emissivity variations.
  • AISI 4140 steel was machined using coated tungsten carbide inserts at varying cutting speeds (300-400 m/min) and feed rates (0.08-0.16 mm/tooth).

Main Results:

  • The developed ratio pyrometer system achieved satisfactory calibration and experimental results.
  • Measured cutting temperatures ranged from 304°C to a maximum of 518°C.
  • Cutting temperature increased with higher cutting speeds and feed rates, with cutting speed being the dominant factor.

Conclusions:

  • The proposed ratio pyrometer system offers a convenient, effective, and precise method for measuring cutting temperatures in machining processes.
  • The experimental findings provide valuable data on temperature variations under different high-speed milling conditions.
  • The emissivity compensation technique enhances the accuracy of non-contact temperature measurement in harsh manufacturing environments.