NDLI: Measurement of Tool Internal Temperatures in the Tool-Chip Contact Region by Embedded Thin Film Micro Thermocouples

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Werschmoeller, Dirk Li, Xiaochun
Copyright Year	2010
Abstract	Monitoring and controlling thermomechanical parameters in tooling materials are imperative for improving the fundamental understanding, reliability and workpiece quality of material removal processes. Polycrystalline boron nitride (PCBN) tools are being used heavily in hard machining/turning. These processes are very sensitive to variation in local machining conditions at tool-workpiece interface and lack a thorough understanding of fundamental thermo-mechanical phenomena, both often leading to abrupt tool failures. Existing sensors to monitor the machining conditions are not suitable for robust process control as they are either destructively embedded and/or don’t possess the necessary spatial and temporal resolution to monitor temperature during machining at the cutting tip/edge effectively. This paper presents an emerging approach for assessing dynamic temperatures in the close vicinity of the tool cutting edge. An array of 10 micro thin film micro thermocouples, fabricated using adapted semiconductor microfabrication methods, has been embedded into PCBN using a modified diffusion bonding technique. Scanning electron microscopy was performed to examine material interactions at the bonding interface and determine optimal bonding parameters. The sensors’ performance is statically and dynamically characterized. They show good linearity, sensitivity and very fast response time.
Sponsorship	Manufacturing Engineering Division
Starting Page	371
Ending Page	377
Page Count	7
File Format	PDF
ISBN	9780791849460
DOI	10.1115/MSEC2010-34176
e-ISBN	9780791838877
Volume Number	ASME 2010 International Manufacturing Science and Engineering Conference, Volume 1
Conference Proceedings	ASME 2010 International Manufacturing Science and Engineering Conference
Language	English
Publisher Date	2010-10-12
Publisher Place	Erie, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Semiconductors (materials) Scanning electron microscopy Temperature Thermocouples Process control Machining Diffusion bonding (metals) Tooling Thermomechanics Thin films Cutting Boron Microfabrication Sensors Resolution (optics) Reliability Bonding Failure
Content Type	Text
Resource Type	Article

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Micro Thin Film Thermal Sensors Embedded Into Polycrystalline Cubic Boron Nitride (PCBN) for Advanced Machining Study

Measurement of Transient Tool Internal Temperature Fields During Hard Turning by Embedded Thin Film Sensors

Experimental Investigation of Hard Turning Mechanisms by PCBN Tooling Embedded Micro Thin Film Thermocouples

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Measurement of Transient Tool-Internal Temperature Fields During Hard Turning by Insert-Embedded Thin Film Sensors

Micro Thin Film Sensor Embedding in Metals by Ultrasonic Welding for Production of Miniature Smart Tooling

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Wireless Acquisition of Temperature Data From PCBN Embedded Thin Film Sensors

Micro Thin Film Sensor Embedded in Metal Structures for In-Situ Process Monitoring During Ultrasonic Welding

Measurement of Tool Internal Temperatures in the Tool-Chip Contact Region by Embedded Thin Film Micro Thermocouples

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