Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools

Guoyu Yu; Hsing Yu Wu; David Walker; Xiao Zheng; Hongyu Li; Christina Dunn; Caroline Gray

doi:10.1117/12.2232657

Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools

Guoyu Yu, Hsing Yu Wu, David Walker, Xiao Zheng, Hongyu Li, Christina Dunn, Caroline Gray

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Citations (Scopus)

Abstract

After the formal acceptance of our fabrication of E-ELT segments, we aim to further accelerate the mass production by introducing an intermediate grolishing procedure using industrial robots, reducing the total process time by this much faster and parallel link. In this paper, we have presented research outputs on tool design, tool path generation, study of mismatch between rigid, semi-rigid tool and aspheric surface. It is indicated that the generation of mid-spatial frequency is proportional to the grit size and misfit between work piece and tool surfaces. Using a Non-Newtonian material tool with a spindle speed of 30 rpm has successfully reduce the mid-spatial error. The optimization of process parameters involve the study the combination effects of the above factors. These optimized parameters will result in a lookup table for reference of given input surface quality. Future work may include the higher spindle speed for grolishing with non- Newtonian tool looking for potential applications regarding to form correction, higher removal rate and edge control.

Original language	English
Title of host publication	Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Editors	Ramón Navarro, James H. Burge
Publisher	SPIE
Number of pages	6
Volume	9912
ISBN (Electronic)	9781510602045
ISBN (Print)	9781510602038
DOIs	https://doi.org/10.1117/12.2232657
Publication status	Published - 22 Jul 2016
Event	SPIE Astronomical Telescopes + Instrumentation - Edinburgh International Conference Centre, Edinburgh, United Kingdom Duration: 26 Jun 2016 → 1 Jul 2016 Conference number: 2 http://spie.org/Publications/Proceedings/Volume/9904?SSO=1 (Link to Event Proceedings) https://spie.org/conferences-and-exhibitions/past-conferences-and-exhibitions/astronomical-instrumentation-and-telescopes-2016

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	SPIE
Volume	9912
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	SPIE Astronomical Telescopes + Instrumentation
Country/Territory	United Kingdom
City	Edinburgh
Period	26/06/16 → 1/07/16
Internet address	http://spie.org/Publications/Proceedings/Volume/9904?SSO=1 (Link to Event Proceedings) https://spie.org/conferences-and-exhibitions/past-conferences-and-exhibitions/astronomical-instrumentation-and-telescopes-2016

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Cite this

Yu, G., Wu, H. Y., Walker, D., Zheng, X., Li, H., Dunn, C., & Gray, C. (2016). Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools. In R. Navarro, & J. H. Burge (Eds.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II (Vol. 9912). [99123Q] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9912). SPIE. https://doi.org/10.1117/12.2232657

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title = "Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools",

abstract = "After the formal acceptance of our fabrication of E-ELT segments, we aim to further accelerate the mass production by introducing an intermediate grolishing procedure using industrial robots, reducing the total process time by this much faster and parallel link. In this paper, we have presented research outputs on tool design, tool path generation, study of mismatch between rigid, semi-rigid tool and aspheric surface. It is indicated that the generation of mid-spatial frequency is proportional to the grit size and misfit between work piece and tool surfaces. Using a Non-Newtonian material tool with a spindle speed of 30 rpm has successfully reduce the mid-spatial error. The optimization of process parameters involve the study the combination effects of the above factors. These optimized parameters will result in a lookup table for reference of given input surface quality. Future work may include the higher spindle speed for grolishing with non- Newtonian tool looking for potential applications regarding to form correction, higher removal rate and edge control.",

keywords = "Asphere, Grolishing, Metrology, Mid-spatial error, Robot, Segment mirrors, Telescope",

author = "Guoyu Yu and Wu, {Hsing Yu} and David Walker and Xiao Zheng and Hongyu Li and Christina Dunn and Caroline Gray",

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Yu, G, Wu, HY, Walker, D, Zheng, X, Li, H, Dunn, C & Gray, C 2016, Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools. in R Navarro & JH Burge (eds), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. vol. 9912, 99123Q, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9912, SPIE, SPIE Astronomical Telescopes + Instrumentation, Edinburgh, United Kingdom, 26/06/16. https://doi.org/10.1117/12.2232657

Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools. / Yu, Guoyu; Wu, Hsing Yu; Walker, David et al.

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. ed. / Ramón Navarro; James H. Burge. Vol. 9912 SPIE, 2016. 99123Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9912).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Walker, David

AU - Zheng, Xiao

AU - Li, Hongyu

AU - Dunn, Christina

AU - Gray, Caroline

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N2 - After the formal acceptance of our fabrication of E-ELT segments, we aim to further accelerate the mass production by introducing an intermediate grolishing procedure using industrial robots, reducing the total process time by this much faster and parallel link. In this paper, we have presented research outputs on tool design, tool path generation, study of mismatch between rigid, semi-rigid tool and aspheric surface. It is indicated that the generation of mid-spatial frequency is proportional to the grit size and misfit between work piece and tool surfaces. Using a Non-Newtonian material tool with a spindle speed of 30 rpm has successfully reduce the mid-spatial error. The optimization of process parameters involve the study the combination effects of the above factors. These optimized parameters will result in a lookup table for reference of given input surface quality. Future work may include the higher spindle speed for grolishing with non- Newtonian tool looking for potential applications regarding to form correction, higher removal rate and edge control.

AB - After the formal acceptance of our fabrication of E-ELT segments, we aim to further accelerate the mass production by introducing an intermediate grolishing procedure using industrial robots, reducing the total process time by this much faster and parallel link. In this paper, we have presented research outputs on tool design, tool path generation, study of mismatch between rigid, semi-rigid tool and aspheric surface. It is indicated that the generation of mid-spatial frequency is proportional to the grit size and misfit between work piece and tool surfaces. Using a Non-Newtonian material tool with a spindle speed of 30 rpm has successfully reduce the mid-spatial error. The optimization of process parameters involve the study the combination effects of the above factors. These optimized parameters will result in a lookup table for reference of given input surface quality. Future work may include the higher spindle speed for grolishing with non- Newtonian tool looking for potential applications regarding to form correction, higher removal rate and edge control.

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ER -

Yu G, Wu HY, Walker D, Zheng X, Li H, Dunn C et al. Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools. In Navarro R, Burge JH, editors, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II. Vol. 9912. SPIE. 2016. 99123Q. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2232657

Optimisation of Grolishing Freeform Surfaces with Rigid and Semi-rigid Tools

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