Proceedings ArticleDOI
Edge effects with Preston equation
Esteban Luna-Aguilar,Alberto Cordero-Dávila,Jorge González,Manuel Nunez-Alfonso,Victor Cabrera,Carlos Robledo-Sanchez,Jorge Cuautle-Cortez,Maria H. Pedrayes +7 more
TLDR
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.read more
Citations
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Journal ArticleDOI
Parametric modeling of edge effects for polishing tool influence functions.
TL;DR: A new parametric model is provided that fits 5 parameters to measured data to accurately predict the edge TIF for cases of a polishing tool that is either spinning or orbiting over the edge of the workpiece.
Journal ArticleDOI
Edge effects with the Preston equation for a circular tool and workpiece
Alberto Cordero-Dávila,Jorge González-García,María Pedrayes-López,Luis Alberto Aguilar-Chiu,Jorge Cuautle-Cortés,Carlos Robledo-Sanchez +5 more
TL;DR: A new model in which the pressure is higher at the edge is applied to the case of a circular tool that polishes a circular workpiece and correctly predicts that a greater amount of material is removed from the edge of the workpiece.
Journal ArticleDOI
Edge control in precision robotic polishing based on space-variant deconvolution
TL;DR: An effective method is proposed to reduce the edge error in the polishing of large mirrors by using an industrial robotic polisher and the edge roll-off error is effectively suppressed.
Journal ArticleDOI
Edge effect modeling and experiments on active lap processing
TL;DR: The material removal rules when edge effects happen are obtained through experiments, which are carried out on a Φ1090-mm circular flat mirror with a 375-mm-diameter lap and two methods are proposed to model the edge TIFs for CCAL.
Journal ArticleDOI
Edge control in a computer controlled optical surfacing process using a heterocercal tool influence function.
TL;DR: A new concept of the 'heterocercal' tool influence function (TIF), generated from compound motion equipment, that enables significant control of the edge effect and convergence of entire surface errors in large tool-to-mirror size-ratio conditions and will largely help manufacturing efficiency in some extremely large optical system projects.
References
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Journal ArticleDOI
Fabrication of aspherics using a mathematical model for material removal.
TL;DR: A mathematica model has been developed that predicts the aspheric surface that a typical optical surfacing machine will produce, and has been verified experimentally for the grinding process.