Hazra, S. K. , Williams, D. K., Roy, Rajat, Aylmore, R., Allen, M. and Hollingdale, D. (2011) Predicting the occurrence of cosmetic defects in automotive skin panels. In: The 14th International ESAFORM Conference on Material Forming - ESAFORM 2011, Queen's University Belfast, UK, Apr 27-29, 2011. Published in: AIP Conference Proceedings, Vol.1353 pp. 253-257. ISSN 0094-243X. doi:10.1063/1.3589524

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Abstract

The appearance of defects such as 'hollows' and 'shock lines' can affect the perceived quality and attractiveness of automotive skin panels. These defects are the result of the stamping process and appear as small, localized deviations from the intended styling of the panels. Despite their size, they become visually apparent after the application of paint and the perceived quality of a panel may become unacceptable. Considerable time is then dedicated to minimizing their occurrence through tool modifications. This paper will investigate the use of the wavelet transform as a tool to analyze physically measured panels. The transform has two key aspects. The first is its ability to distinguish small scale local defects from large scale styling curvature. The second is its ability to characterize the shape of a defect in terms of its wavelength and a 'correlation value'. The two features of the transform enable it to be used as a tool for locating and predicting the severity of defects. The paper will describe the transform and illustrate its application on test cases.

Item Type:	Conference Item (Paper)
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics T Technology > TS Manufactures
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	AIP Conference Proceedings
Publisher:	American Institute of Physics
ISSN:	0094-243X
Official Date:	2011
Dates:	Date Event 2011 Published
Volume:	Vol.1353
Page Range:	pp. 253-257
DOI:	10.1063/1.3589524
Status:	Not Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Title of Event:	The 14th International ESAFORM Conference on Material Forming - ESAFORM 2011
Type of Event:	Conference
Location of Event:	Queen's University Belfast, UK
Date(s) of Event:	Apr 27-29, 2011

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