Service life of glass workpieces: influence of the grinding parameters on the surface roughness and the fracture strength

Abstract

International audienceGlass manufacturing brings challenging issues when it comes to optimising a material removal process with regards to the workpieces service life. Scratches, cracks and sub-surface damages (SSD) resulting of a roughing process could propagate and lead to workpieces fracture. This paper focuses on the optimisation of grinding parameters with regards to the surface finish in order to maximise the service life of a glass workpiece. A central composite design of experiments has been used to investigate the influence of feed rate, depth of cut, wheel speed and manufacturing strategy on the surface finish and on the fracture strength through a three-point flexural bend test. Relevancy of the roughness parameters is discussed and the authors propose to use the roughness parameters derived from the Abbott-Firestone curve Rvk and the material ratio 100−Mr2 to characterise the surface finishes of the ground glass samples

Framework of models for selecting manufacturing processes and associated parameters for surface topographies

“…A few studies have been focused on the correlation between surface characteristics and their function [2][3][4]. Other studies have investigated the influence of the process parameters on the surface finish [5][6][7]. Some studies have also been carried out on topographies classification, but no correlations with manufacturing processes have been established yet [8].…”