Showing papers by "Alberto Cordero-Dávila published in 2003"
TL;DR: In this paper, a new pressure distribution model was proposed to calculate the wear produced by a square tool on a glass border moving along straight lines, which presents like a skin effect.
Abstract: In the polishing process, the wear tends to be greater when the tool extends beyond the edge of the workpiece. A linear pressure distribution (between the tool and the workpiece) has been used to explain this effect, however, this model also can predict negative pressures. This could mean that material is deposited instead of being removed. We present a new pressure distribution proposal, which presents like a skin effect. This means that the pressure is significantly higher at the border points than at internal points of the glass. With this model the material removal at the border points is increased considerably since, according to Preston, the wear is proportional to the pressure. This pressure distribution model is applied to calculate the wear produced by a square tool on a glass border moving along straight lines.
26 citations
TL;DR: In this article, a hydrodynamic radial tool (HyDra) is used to expels a suspension of water and polishing particles radially on glass. But the tool is not suitable for fabrication of optical flat and Schmidt surfaces.
Abstract: We report experimental results and analysis about a new hydrodynamic radial tool (HyDra, patent pending), which expels a suspension of water and polishing particles radially on glass. With this method it is possible to locally shape optical surfaces. The depth of material removed by HyDra grows linearly with the time. The removal rate is independent of the velocity between the tool and the glass element. The HyDra has been used to fabricate successfully an optical flat and Schmidt surface.
7 citations