Paper Title:
Subtle Cosmetic Defects in Automotive Skin Panels
  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.

  Info
Periodical
Key Engineering Materials (Volumes 410-411)
Main Theme
Edited by
B. Shirvani, R. Clarke, J. Duflou, M. Merklein, F. Micari and J. Griffiths
Pages
197-205
DOI
10.4028/www.scientific.net/KEM.410-411.197
Citation
S. Hazra, D. K. Williams, R. Roy, R. Aylmore, A. Smith, "Subtle Cosmetic Defects in Automotive Skin Panels", Key Engineering Materials, Vols. 410-411, pp. 197-205, 2009
Online since
March 2009
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yang Jun Wang, Ming Zhou, Yuan Jing Zhang
Abstract:This paper presents an experimental study in high speed milling of SiCp/Al composites. Machining tests were carried out on a high speed...
129
Authors: Xiao Li He, Chong Liu
Abstract:A method used to recognize the inner defects of 3-D braided composite materials is discussed. Firstly, the link between UT signals and the...
394
Authors: Zhe Liu
Abstract:Aiming at current situation of absenting effective texture feature model for irregular defects of fabric image, this paper proposes a new...
566
Authors: Guo Ping Li, Yong Kui Zhang, Chang Sheng Ai, Yu Zhen Ma
Abstract:Surface quality of bearing ball is one of important factors to improve service performance. It is difficult to detect bearing ball surface...
658
Authors: Hong Wei Ma, Qing Hua Mao, Xu Hui Zhang, Da Wei Zhang, Hai Yu Chen
Chapter 3: Mechatronics and Automation
Abstract:Because of steel cord conveyor belt with high load operating and complex conditions of coal mine, it is prone to cause conveyor belt...
1814