Understanding the source of acoustic emission signals during the wear of stamping tools
Vignesh V. Shanbhag,Bernard Rolfe,N. Arunachalam,Michael P. Pereira +3 more
- Vol. 418, Iss: 1, pp 012098
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TLDR
In this article, a correlation between the sources of the acoustic emission signal to the specific surface wear mechanism observed in the stamping process was established. But the authors did not investigate the source of acoustic emission signals.Abstract:
Stamping tools are prone to wear due to the increased use of advanced high strength steels in the automotive industry. For active monitoring of the wear state of stamping tools using acoustic emission, it is important to establish a correlation between specific wear mechanisms and the acoustic emission signals. An adhesive wear mode (galling), which is commonly observed on the stamping tool, can occur in combination with multiple abrasive wear modes on the workpiece, such as ploughing and cutting. This study will establish a correlation between the sources of the acoustic emission signal to the specific surface wear mechanism observed in the stamping process. Therefore, to investigate the source of acoustic emission signal, sheet metal stamping wear tests were conducted using un-worn and worn tool steel dies (AISI D2) and advanced high strength steel sheet (DP780). Accelerated tribology tests were also conducted using a scratch tester with the same material combination, where galling, cutting and ploughing wear mechanisms were observed. By correlating the acoustic emission features, such as power spectral density from the stamping test and the scratch test, it was observed that the change in the acoustic emission signal observed in the stamping process could be attributed to the galling wear mechanismsThis study contributes to the fundamental understanding of different wear mechanisms in sheet metal forming process, the resulting acoustic emissions, and how these can be utilized to develop active monitoring of the tools in the future.read more
Citations
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Journal ArticleDOI
Investigation of Galling Wear Using Acoustic Emission Frequency Characteristics
TL;DR: In this paper, the authors determined the frequency characteristics of the acoustic emission (AE) burst waveform that can be used to monitor galling wear, independent of the experimental process examined.
Journal ArticleDOI
Understanding galling wear initiation and progression using force and acoustic emissions sensors
TL;DR: In this paper, two sets of scratch tests were performed to study the galling behavior using force and acoustic emission sensors in sheet metal stamping processes, where galling, ploughing and cutting can be observed.
References
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TL;DR: In this article, the features of acoustic emission (AE) signals generated during adhesive wear and during abrasive mechanical wear were examined, and the results permit the recognition of wear mechanisms by the AE technique.