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Workpiece temperature prediction by model and measurement by pyrometer

Workpiece temperature prediction by model and measurement by pyrometer Purpose – This paper aims to examine the use of a commercial pyrometer to measure the surface temperature of workpieces as machining takes place. The pyrometer readings are to be compared with model predictions. Design/methodology/approach – The pyrometer was mounted on an industrial milling machine and the temperature of the workpiece was measured behind the cutting tool as it traversed the workpiece. A mathematical spreadsheet model was used to predict the temperatures at the point measured by the pyrometer and at the point where cutting took place. Findings – It was found by selecting the “partition ratio” of the power being transmitted to the workpiece that agreement could be found between measured and predicted results. Research limitations/implications – The work was mainly carried out on aluminium samples, which exhibited low cutting temperatures. Originality/value – The paper describes a method of finding the partition ratio of heat going into the workpiece. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Workpiece temperature prediction by model and measurement by pyrometer

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Publisher
Emerald Publishing
Copyright
Copyright © 2008 Emerald Group Publishing Limited. All rights reserved.
ISSN
0002-2667
DOI
10.1108/00022660810882746
Publisher site
See Article on Publisher Site

Abstract

Purpose – This paper aims to examine the use of a commercial pyrometer to measure the surface temperature of workpieces as machining takes place. The pyrometer readings are to be compared with model predictions. Design/methodology/approach – The pyrometer was mounted on an industrial milling machine and the temperature of the workpiece was measured behind the cutting tool as it traversed the workpiece. A mathematical spreadsheet model was used to predict the temperatures at the point measured by the pyrometer and at the point where cutting took place. Findings – It was found by selecting the “partition ratio” of the power being transmitted to the workpiece that agreement could be found between measured and predicted results. Research limitations/implications – The work was mainly carried out on aluminium samples, which exhibited low cutting temperatures. Originality/value – The paper describes a method of finding the partition ratio of heat going into the workpiece.

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Jul 4, 2008

Keywords: Temperature; Surface conductivity; Material‐removal processes

References