Core Temperature Measurement in Subtractive Manufacturing Processes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Temperature variation is one of the most important factors that affect the dimensional accuracy and surface integrity of workpieces during machining processes. Several attempts have been made towards estimating machine tool and workpiece temperature. The techniques used generally depend on the type of material and the level of accuracy required. However, none of the existing techniques gives a true representation of the core temperature of the workpiece.
The speed of sound in any material depends on the temperature of the material. This dependence can be used to obtain the temperature of the material, provided that the speed of sound can be obtained. The speed of sound can be obtained using the length of the material and the ultrasonic time of travel through the material. The challenge however arises in developing a cost effective acquisition device that can resolve up to 0.5 °C variation with ± 1 °C accuracy. In order to achieve this goal, simulations were done in MATLAB using the k-wave toolbox to determine the required parameters needed for achieving the stated resolution and accuracy. Sensitivity analysis was conducted and the results show the output of simulation of two viable ultrasonic thermometry methods – the pulse-echo method and the continuous wave method. The results of this study will serve as the input for designing and developing an in-process temperature measurement system for subtractive manufacturing processes.
LanguageEnglish
Title of host publicationLamdamap 13th International Conference & Exhibition
Subtitle of host publication13th -14th March 2019, AMRC, UK
Publication statusAccepted/In press - Jan 2019
EventLamdamap 13th International Conference & Exhibition - Advanced Manufacturing Research Centre (AMRC), Sheffield, United Kingdom
Duration: 13 Mar 201914 Mar 2019
https://www.euspen.eu/events/lamdamap-2019/

Conference

ConferenceLamdamap 13th International Conference & Exhibition
CountryUnited Kingdom
CitySheffield
Period13/03/1914/03/19
Internet address

Fingerprint

Temperature measurement
Acoustic wave velocity
Temperature
Ultrasonics
Machine tools
MATLAB
Sensitivity analysis
Machining
Costs

Cite this

Olabode, O. F., Fletcher, S., Longstaff, A., & Mian, N. (Accepted/In press). Core Temperature Measurement in Subtractive Manufacturing Processes. In Lamdamap 13th International Conference & Exhibition: 13th -14th March 2019, AMRC, UK
Olabode, Olaide F ; Fletcher, Simon ; Longstaff, Andrew ; Mian, Naeem. / Core Temperature Measurement in Subtractive Manufacturing Processes. Lamdamap 13th International Conference & Exhibition: 13th -14th March 2019, AMRC, UK. 2019.
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Olabode, OF, Fletcher, S, Longstaff, A & Mian, N 2019, Core Temperature Measurement in Subtractive Manufacturing Processes. in Lamdamap 13th International Conference & Exhibition: 13th -14th March 2019, AMRC, UK. Lamdamap 13th International Conference & Exhibition, Sheffield, United Kingdom, 13/03/19.

Core Temperature Measurement in Subtractive Manufacturing Processes. / Olabode, Olaide F; Fletcher, Simon; Longstaff, Andrew; Mian, Naeem.

Lamdamap 13th International Conference & Exhibition: 13th -14th March 2019, AMRC, UK. 2019.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AU - Fletcher, Simon

AU - Longstaff, Andrew

AU - Mian, Naeem

PY - 2019/1

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N2 - Temperature variation is one of the most important factors that affect the dimensional accuracy and surface integrity of workpieces during machining processes. Several attempts have been made towards estimating machine tool and workpiece temperature. The techniques used generally depend on the type of material and the level of accuracy required. However, none of the existing techniques gives a true representation of the core temperature of the workpiece.The speed of sound in any material depends on the temperature of the material. This dependence can be used to obtain the temperature of the material, provided that the speed of sound can be obtained. The speed of sound can be obtained using the length of the material and the ultrasonic time of travel through the material. The challenge however arises in developing a cost effective acquisition device that can resolve up to 0.5 °C variation with ± 1 °C accuracy. In order to achieve this goal, simulations were done in MATLAB using the k-wave toolbox to determine the required parameters needed for achieving the stated resolution and accuracy. Sensitivity analysis was conducted and the results show the output of simulation of two viable ultrasonic thermometry methods – the pulse-echo method and the continuous wave method. The results of this study will serve as the input for designing and developing an in-process temperature measurement system for subtractive manufacturing processes.

AB - Temperature variation is one of the most important factors that affect the dimensional accuracy and surface integrity of workpieces during machining processes. Several attempts have been made towards estimating machine tool and workpiece temperature. The techniques used generally depend on the type of material and the level of accuracy required. However, none of the existing techniques gives a true representation of the core temperature of the workpiece.The speed of sound in any material depends on the temperature of the material. This dependence can be used to obtain the temperature of the material, provided that the speed of sound can be obtained. The speed of sound can be obtained using the length of the material and the ultrasonic time of travel through the material. The challenge however arises in developing a cost effective acquisition device that can resolve up to 0.5 °C variation with ± 1 °C accuracy. In order to achieve this goal, simulations were done in MATLAB using the k-wave toolbox to determine the required parameters needed for achieving the stated resolution and accuracy. Sensitivity analysis was conducted and the results show the output of simulation of two viable ultrasonic thermometry methods – the pulse-echo method and the continuous wave method. The results of this study will serve as the input for designing and developing an in-process temperature measurement system for subtractive manufacturing processes.

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Olabode OF, Fletcher S, Longstaff A, Mian N. Core Temperature Measurement in Subtractive Manufacturing Processes. In Lamdamap 13th International Conference & Exhibition: 13th -14th March 2019, AMRC, UK. 2019