CNC subaperture polishing process arrangement for microroughness minimisation

F. Prochaska; O. Matousek; D. Tomka; J. Polak; I. Poláková

doi:10.1117/12.2087102

7 January 2015 CNC subaperture polishing process arrangement for microroughness minimisation

F. Prochaska, O. Matousek, D. Tomka, J. Polak, I. Poláková

Proceedings Volume 9442, Optics and Measurement Conference 2014; 944216 (2015) https://doi.org/10.1117/12.2087102
Event: Optics and Measurement Conference 2014, 2014, Liberec, Czech Republic

Abstract

The aim of this study was to determine the optimal subaperture polishing procedure for aspherical surfaces on the Optotech MCP 250 CNC machine. Due to the fact that the CNC subaperture polishing process runs along well defined paths, certain frequencies develop on the polished surface, which can be limiting for the resulting microroughness. A proper sequence of polishing steps in different tool motion control modes can minimize these frequencies and help to substantially reduce microroughness. In this context, various tool motion control modes ("Spiral spindle mode", "Spiral axis mode" and "Raster mode") in combination with different tools were tested. The resulting microroughness values were observed in the defined mid-frequency and high-frequency areas. The best results, i.e. the lowest microroughness values were obtained using a combination of the processes "Ball spiral axis mode", "FEM raster mode", "spiral spindle 2D FEM correction mode" and "AFJ spiral axis mode"

Citation Download Citation

F. Prochaska, O. Matousek, D. Tomka, J. Polak, and I. Poláková "CNC subaperture polishing process arrangement for microroughness minimisation", Proc. SPIE 9442, Optics and Measurement Conference 2014, 944216 (7 January 2015); https://doi.org/10.1117/12.2087102

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