3D QUANTIFICATION OF MACHINING DEFECTS: A three-dimensional approach for tolerancing analysis and synthesis

摘要

This paper is proposing to validate a three-dimensional model on manufacturing tolerancing for mechanical parts. The work presented relies on research conducted at the LURPA (Ballot and Bourdet) on the computation of three-dimensional tolerance chains for mechanisms. Models of the workpiece, the set-ups and the machining operations are provided. The concept of the Small Displacements Torsor (SDT) is used to model the process planning. The first part introduces the use of the concept of SDT in the case of manufacturing tolerancing. Then we propose, for a chosen workpiece, an experimental approach to measure and quantify the three-dimensional machining variations as torsors. At last, an analysis of the results is proposed.