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Proceedings Paper

Tool geometry and wear effects in diamond turning
Author(s): Richard A. Parker; Alan Richard Hedges; D. J. Holt; John K. Myler
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Paper Abstract

The inprocess interferometric techniques employed at British Aerospace enable diamond turning tools to be centred to accuracies exceeding 10 microinches. In addition to Ogive error the interferograms ifiustrate higher order effects such as tool geometry, cuuer radius defects and wear. A detailed analysis of diamond tool geometries was carried out and used to evaluate the resultant form defects arising in components. This analysis was then used to develop software compensation which could eliminate the errors of tool geometry. Simulation results showed that for the negative tool rakes used to machine infrared materials, software compensation is essential. A simple tool wear model was devised on the basis of wear being directly proportional to distance travelled. This model was used to demonstrate the frequently observed phenomenon of extending a tools effective lifetime by adjusting X-centre. Machine trials are currently underway to measure the reproducibility of wear effects .This will determine the validity of our basic model and enable us to derive a more accurate solution.

Paper Details

Date Published: 1 October 1990
PDF: 12 pages
Proc. SPIE 1320, Infrared Technology and Applications, (1 October 1990); doi: 10.1117/12.22339
Show Author Affiliations
Richard A. Parker, British Aerospace (Dynamics) L (United Kingdom)
Alan Richard Hedges, British Aerospace (Dynamics) L (United States)
D. J. Holt, British Aerospace (Dynamics) L (United Kingdom)
John K. Myler, British Aerospace (Dynamics) Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 1320:
Infrared Technology and Applications
Alan H. Lettington, Editor(s)

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