Service life of glass workpieces: influence of the grinding parameters on the surface roughness and the fracture strength Online publication date: Tue, 13-May-2014
by Antoine Brient; Marc Brissot; Jean-Christophe Sangleboeuf
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 15, No. 1/2, 2014
Abstract: Glass 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.
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