Research - Commercialisation
Control of the geometric quality of parts with complex shapes in the context of digital continuity
On July 11, 2019
10 am
PhD thesis defense by Yann Fallot (LURPA) Domain: Mechanical construction
Yann Fallot
- Jean-François FONTAINE, Professor, University of Bourgogne,
- Denis Teissandier, Professor, University of Bordeaux,
- Jean-Yves Dantan, Professor, Arts et Métiers ParisTech,
- Laurent Pierre, Assistant Professor, University Paris-Saclay,
- François Thiebaut, Assistant Professor, UniversitéyParis-Saclay,
- Marie Royer, Engineer, Safran Aircraft Engines Corbeil.
Keywords : ISO tolerancing, Deviation control, Digital continuity, Deformed parts
Abstract :
This PhD work is being carried out as part of a CIFRE PhD thesis in collaboration between Safran Aircraft Engines and the LURPA of the ENS Paris-Saclay. Safran Aircraft Engines designs and manufactures engines for civil and military aircraft. In order to meet the high level of global industrial development, Safran Aircraft Engines is constantly seeking to optimize the definitions of its parts while respecting production rate. Tolerancing standards are changing and control methods are improving. The challenge of this work is to control the geometric quality of complex shaped parts in the context of digital continuity.
A method is used to establish the links between functions and geometric specifications. In addition, the traceability of dimensional and geometric characteristics is established during the product tolerancing phase. An extension of the CLIC method to components that deform locally is proposed. This extension is integrated into the tolerance method used to establish the links between functions and specifications.
An innovative method of generating shape descriptors on surfaces allowing the separation of size, of shape, of position, and of orientation deviations is described in order to achieve a Discrete Modal Decomposition. In addition, the analysis of the results of the Discrete Modal Decomposition applied to thirty complex surfaces allows us to know the repeatability of the manufacturing process.
- Type :
- Recent Ph.D and HDR defenses
- Place(s) :
- Cachan Campus
e-media lacture hall, building Léonard de Vinci