Analyses expérimentales et modélisation de la formation de bavures dans l’alliage AlSi7Mg0,3+0,5Cu – Application en coupe orthogonale et en fraisage

Abstract : In a context of production lines optimization, parts quality and machine capabilities control is essential. Several studies have been carried out on machining burr formation but the mechanisms are not fully understood, although a strong link between burrs formation and cutting forces is established by several authors. Hence, controlling the cutting forces has two advantages: optimize the production lines and be used as input data for a burr height model. This study proposes to consolidate the knowledge on burr formation mechanisms during the exit of a tooth, and to predict cutting forces during high speed milling of the AlSi7Mg0.7+0.5Cu alloy. Various burr formation mechanisms are studied in orthogonal cutting. A new in situ measurement method allows to identify the statistical influence of some operational conditions on the evolution of some newly introduced geometrical parameters defining the burrs heterogeneously formed in the case of the studied alloy, whose behavior strongly depends on its local stress state as well as its microstructure. A displacement and strain field analysis using Digital Image Correlation, as well as a finite element model provide a better understanding of the burr formation mechanisms. Face milling is studied to model cutting forces and compare the forces produced during the exit of a tooth to the obtained burr morphologies. Finally, a burr height reduction strategy is proposed using a high feed mill.
Complete list of metadatas

https://pastel.archives-ouvertes.fr/tel-02049734
Contributor : Abes Star <>
Submitted on : Tuesday, February 26, 2019 - 3:45:07 PM
Last modification on : Wednesday, April 3, 2019 - 1:59:13 AM
Long-term archiving on : Monday, May 27, 2019 - 2:45:35 PM

File

REGNIER.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02049734, version 1

Collections

Citation

Tristan Regnier. Analyses expérimentales et modélisation de la formation de bavures dans l’alliage AlSi7Mg0,3+0,5Cu – Application en coupe orthogonale et en fraisage. Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2018. Français. ⟨NNT : 2018ENAM0055⟩. ⟨tel-02049734⟩

Share

Metrics

Record views

335

Files downloads

173