In the high-end optical instrument application, aspherical lenses have replaced spherical lenses and became a keycomponent owing to the aberration correction characteristic it benefits. Though aspherical lenses truly provide multipleadvantages, as long as the uncertainty and time-taking issue remain unsolved in CNC polishing process, the term “massproduction” will still be far from realization. In this paper, we have developed a method based on Preston’s equation andthe Hertz-Contact theorem (HCT) to construct the tool influence function (TIF), hoping to increase the convergence ofthe process result. We will also discuss how different tool offsets affect the polishing force against the workpiece. Wefirstly obtained velocity distribution between bonnet and workpiece from dynamics in polar coordinates, then applied theequivalent contacting-Young’s modulus in Hertz-Contact theorem to calculate the pressure distribution model.Subsequently, we conducted a series of experiments under IRP1000 by Zeeko Ltd. and avoided unstable outcomescaused by both machine vibration and deficient tool offset. We modified the parameters into five different feed rateswhile remaining the equivalent dwelling time, to create more observable features of material removed and further provedthe linearity relationship between the dwell time and the removal depth. We applied LP66 as the polishing pad and fusedsilica as the workpiece to acquire the experiment result.
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