Hazra, S. (Sumit), Williams, D., Roy, R., Aylmore, R. and Smith, A. (2009) Subtle cosmetic defects in automotive skin panels. In: 13th International Conference on Sheet Metal, Birmingham City Univ, Birmingham, England, April 06-08, 2009. Published in: Key Engineering Materials, Vol.410-411 pp. 197-205.

Full text not available from this repository.

Abstract

Cosmetic defects such as 'hollows' are the result of deviations in a skin panel. These deviations are usually too small and local to be detected by discrete measurements of the panel but become visually apparent after the application of paint. As a result, the perceived quality of a panel may become unacceptable and considerable time may be dedicated to minimizing their occurrence through tool modifications. This paper proposes that there are three aspects to the problem: the springback or buckling of the panel, the optics of the painted panel and the ability of an observer to perceive the defect. In particular, it will be argued that hollows cause optical distortions that inform the human eye of the presence of a defect. The paper then suggests that signal processing techniques, in particular the wavelet transform, provide a simple way of locating and quantifying the severity of these defects. The transform was applied to two physical parts and a simulation model.

Item Type:	Conference Item (Paper)
Subjects:	T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Series Name:	Key Engineering Materials
Journal or Publication Title:	Key Engineering Materials
Publisher:	Trans Tech Publications Ltd
ISSN:	1013-9826
Editor:	Shirvani, B and Clarke, R and Duflou, J and Merklein, M and Micari, F and Griffiths, J
Date:	2009
Volume:	Vol.410-411
Number of Pages:	9
Page Range:	pp. 197-205
Identification Number:	10.4028/www.scientific.net/KEM.410-411.197
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Title of Event:	13th International Conference on Sheet Metal
Type of Event:	Conference
Location of Event:	Birmingham City Univ, Birmingham, England
Date(s) of Event:	April 06-08, 2009
URI:	http://wrap.warwick.ac.uk/id/eprint/17410

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item