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Développement et mise en œuvre d'une méthodologie d'analyse multi-échelle du procédé de rodage en production de série

Abstract : A surface liner is a cylindrical part fitted into an engine block. It is the most important functional part of an engine and dominates engine functionality. The liner surface is in fact the "original" micro-scale structured surface; designed with a deterministic pattern of high aspect ratio features and anisotropy of surface properties. It comprises alternating flat plateaus (bearing regions) and deep valleys for lubricant, transportation. To manufacture such a functional surface, abrasive honing is the process of choice. The objective of this thesis is to establish a robust methodology that explores the required surface characteristics, based on the premise that an intimate connection exists between the abrasive wear mechanisms prevailing during honing and the multi-scale modification of topographical signatures formed as a result of those mechanisms. These multi-scale modifications of surface structure are connected to the process conditions that the surface has undergone during manufacture and in turn dominate the functional characteristics of the surface. The thesis sets out the basis for using the continuous wavelet transform to investigate the multi-scale nature of the development of surface topography during the honing process used to machine automotive cylinder bores. The multi-scale nature of honing process is clearly demonstrated and appears to be very useful in understanding the development of the multistage surface topography. The implementation of this multiscale approach within a mass production environment allows to correlate the functional quality of the intolerance designed surface and the process of its generation. This implementation consists of computing the multi-scale modifications of the topographical signature, which highlight the essential changes of the surface structure produced on the original surface after the stages of honing. The different applications of this multiscale approach demonstrate also that the process signatures respond in a predictable fashion to changes in process variables, combinations of stage and functional quality of the product.
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https://pastel.archives-ouvertes.fr/pastel-00526528
Contributor : Leila Sabri <>
Submitted on : Thursday, October 14, 2010 - 9:35:26 PM
Last modification on : Wednesday, November 29, 2017 - 9:43:24 AM
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  • HAL Id : pastel-00526528, version 1

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Leila Sabri. Développement et mise en œuvre d'une méthodologie d'analyse multi-échelle du procédé de rodage en production de série. Génie mécanique [physics.class-ph]. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0022⟩. ⟨pastel-00526528⟩

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