Transfer of Process References between Machine Tools for Online Tool Condition Monitoring

Process and tool condition monitoring systems are a prerequisite for autonomous production. One approach to monitoring individual parts without complex cutting simulations is the transfer of knowledge among similar monitoring scenarios. This paper introduces a novel monitoring method which transfers...

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Main Authors: Berend Denkena, Benjamin Bergmann, Tobias H. Stiehl
Format: Article
Language:English
Published: MDPI AG 2021-11-01
Series:Machines
Subjects:
Online Access:https://www.mdpi.com/2075-1702/9/11/282
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author Berend Denkena
Benjamin Bergmann
Tobias H. Stiehl
author_facet Berend Denkena
Benjamin Bergmann
Tobias H. Stiehl
author_sort Berend Denkena
collection DOAJ
description Process and tool condition monitoring systems are a prerequisite for autonomous production. One approach to monitoring individual parts without complex cutting simulations is the transfer of knowledge among similar monitoring scenarios. This paper introduces a novel monitoring method which transfers monitoring limits for process signals between different machine tools. The method calculates monitoring limits statistically from cutting processes carried out on one or more similar machines. The monitoring algorithm aims to detect general process anomalies online. Experiments comprise face-turning operations at five different lathes, four of which were of the same model. Results include the successful transfer of monitoring limits between machines of the same model for the detection of material anomalies. In comparison to an approach based on dynamic time warping (DTW) and density-based spatial clustering of applications with noise (DBSCAN), the new method showed fewer false alarms and higher detection rates. However, for the transfer between different models of machines, the successful application of the new method is limited. This is predominantly due to limitations of the employed process component isolation and differences between machine models in terms of signal properties as well as execution speed.
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spelling doaj.art-8e5becade4af4eea846c016eb8b967212023-11-23T00:06:20ZengMDPI AGMachines2075-17022021-11-0191128210.3390/machines9110282Transfer of Process References between Machine Tools for Online Tool Condition MonitoringBerend Denkena0Benjamin Bergmann1Tobias H. Stiehl2Institute of Production Engineering and Machine Tools, Leibniz Universität Hannover, 30823 Garbsen, GermanyInstitute of Production Engineering and Machine Tools, Leibniz Universität Hannover, 30823 Garbsen, GermanyInstitute of Production Engineering and Machine Tools, Leibniz Universität Hannover, 30823 Garbsen, GermanyProcess and tool condition monitoring systems are a prerequisite for autonomous production. One approach to monitoring individual parts without complex cutting simulations is the transfer of knowledge among similar monitoring scenarios. This paper introduces a novel monitoring method which transfers monitoring limits for process signals between different machine tools. The method calculates monitoring limits statistically from cutting processes carried out on one or more similar machines. The monitoring algorithm aims to detect general process anomalies online. Experiments comprise face-turning operations at five different lathes, four of which were of the same model. Results include the successful transfer of monitoring limits between machines of the same model for the detection of material anomalies. In comparison to an approach based on dynamic time warping (DTW) and density-based spatial clustering of applications with noise (DBSCAN), the new method showed fewer false alarms and higher detection rates. However, for the transfer between different models of machines, the successful application of the new method is limited. This is predominantly due to limitations of the employed process component isolation and differences between machine models in terms of signal properties as well as execution speed.https://www.mdpi.com/2075-1702/9/11/282machine toolsturningprocess monitoringknowledge transfer
spellingShingle Berend Denkena
Benjamin Bergmann
Tobias H. Stiehl
Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
Machines
machine tools
turning
process monitoring
knowledge transfer
title Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
title_full Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
title_fullStr Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
title_full_unstemmed Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
title_short Transfer of Process References between Machine Tools for Online Tool Condition Monitoring
title_sort transfer of process references between machine tools for online tool condition monitoring
topic machine tools
turning
process monitoring
knowledge transfer
url https://www.mdpi.com/2075-1702/9/11/282
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