Étude thermomécanique de la rectification et influence sur l'intégrité de revêtements de chrome dur : introduction de la topographie des meules dans un modèle d'abrasion

Abstract : The grinding process is a manufacturing method that can obtain extremely precise surface conditions. Most of time, it is used on very hard materials when other machining processes are inefficient. Grinding uses complicated material which removal mechanisms are still hard to control. These mechanisms appear on a microscopic scale and are barely detectable. Moreover, grinding supposes important mechanical and thermal energies that can damage the workpiece. These criteria must be taken into account in order to improve the quality and the productivity of the process. In this work, several researches focus have been developed, both by studying the workpiece and by considering the abrasive tool evolution. Analyses have been realized on the chrome coating as well as on the substrate. It allowed us to detect texture variation, surface stresses and hardness on the chrome coating. Due to the process, the latter as well as the substrate under it can also be affected. Experimental results mixed with a finite elements modeling allowed us to understand the heat flux transfer between the workpiece and the necessary conditions in order not to affect it. The evolution of the wheel’s abrasive surface was a full advanced study part with the setup of an indirect measure by footprint. This footprint was then measured by a confocal microscope. A way to redress and filter the topography was developed and allowed to understand better the different grinding wheel wear patterns. Topographic results and analytic model let us determine tangential grinding forces versus grinding tool wear
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https://hal.univ-lorraine.fr/tel-01752153
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Submitted on : Thursday, March 29, 2018 - 1:33:23 PM
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  • HAL Id : tel-01752153, version 1

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Benjamin Weiss. Étude thermomécanique de la rectification et influence sur l'intégrité de revêtements de chrome dur : introduction de la topographie des meules dans un modèle d'abrasion. Autre. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0185⟩. ⟨tel-01752153⟩

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