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Proceedings of CAD'15, 2015, 127-132
Quality Appearance Evaluation of Automotive Bodies: Effect of Flexible Parts Tolerances on Final Product’s Surface Quality

Ali Hashemian, Hakim Sabzevari University
Behnam Moetakef Imani, Ferdowsi University of Mashhad

Abstract. Part tolerances have a crucial effect on the quality of products. In vehicle design, tolerance analysis is of central importance in quality appearance evaluation of automotive bodies and significantly taken into consideration by manufacturers. The relationship between input tolerances and assembly errors is analysed aiming at visualizing the quality of products and conducting quality audits based on statistical tolerance data. This paper evaluates the surface quality of a car’s roof as one of the key quality characteristics in vehicle design. Compared to previous research in the area of quality appearance evaluation of automotive bodies, which are based on the assumption of part rigidity, the current research proposes to include part flexibilities in the analysis. The rigid body analysis cannot account for part deformations and, therefore, some quality appearance issues will not be revealed. The presented methodology of this paper is classified into three main modules: finite element analysis, surface fitting and interrogation, and statistical analysis. The results of this study shows that input tolerances have a considerable effect on the surface quality of the final assembled product.

Keywords. Tolerance Analysis, Quality Appearance Evaluation, Finite Element Analysis, Surface Interrogation, Statistical Analysis

DOI: 10.14733/cadconfP.2015.127-132