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Contribution à la qualification d'un processus de fabrication par une approche dimensionnelle : application au pignon conique forgé dit "net shape"

Abstract : During the recent years, the relationship between customers and suppliers turned to a partnership relation. That's why, the supplier had to change his skills in order to control all the manufacturing process of his products, i. e. from the conception to the realization. In this context, blacksmiths developed a new range of workpieces called “Net Shape”, i. e. their functional surfaces are achieved by forging, thus eliminating the following reworking machining operations. New needs appeared in the forging industry, like the precision monitoring. This control aims at certifying that the workpiece has the required geometrical measurements, but also to better understand every manufacturing process steps. In order to evaluate step by step the manufacturing process and the obtained workpiece functionality it is necessary to accurately choose the measurand without to question the workpiece tolerance and the manufacturing process. In this work, the choice of the measurand to check a forged “Net Shape” bevel pinion for automobile differential is dwelt framework of two goals. Firstly, the measured surface must be representative of a meshing. This implies the study of the pinion's normalized parameters and the way to evaluate them. Secondly, it has to allow a better understanding of the manufacturing process in order to improve it. The new methodology developed in this paper requires the use of a coordinate measuring machine. This method is more suitable to measure the functional surfaces. The results analysis is carried out thanks to a mathematical vector approach. Thus, it allows the dissociation of the influence- once it has been identified-of each physical or technological phenomenon which is representative of the workpiece functionality or the manufacturing process. The study of the pinion after each manufacturing process step enables to better understand the physical phenomena involved in order to develop the mathematical model describing their effects. Initially, just a qualitative study of some manufacturing process steps has been analyzed.
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Submitted on : Friday, May 25, 2007 - 8:00:00 AM
Last modification on : Friday, October 23, 2020 - 4:38:40 PM
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  • HAL Id : pastel-00002353, version 1


Cyrille Baudouin. Contribution à la qualification d'un processus de fabrication par une approche dimensionnelle : application au pignon conique forgé dit "net shape". Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2006. Français. ⟨NNT : 2006ENAM0048⟩. ⟨pastel-00002353⟩



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