Modelling of Electrostatic Charge in Ultra-High Precision Diamond Turning of Contact Lens Polymer

Muhammad Mukhtar Liman; Khaled Abou-El-Hossein

doi:10.4028/www.scientific.net/SSP.298.135

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HomeSolid State PhenomenaSolid State Phenomena Vol. 298Modelling of Electrostatic Charge in Ultra-High...

Modelling of Electrostatic Charge in Ultra-High Precision Diamond Turning of Contact Lens Polymer

Abstract:

The electrostatic charges encountered by a cutting tool when turning advanced contact lenses are important as they reflect the quality and condition of the tool, machine, fixture, and sometimes even the surface finished which is responsible for tool wear and poor surface quality. This study investigates the influence of cutting parameters namely cutting speed, feed rate and depth of cut on electrostatic charge (ESC) which play the leading role in determining the machine economics and quality of machining contact lens polymers. An electrostatic charge model based on response surface statistical method is developed for reliably predicting the values of static charging based on its relationship to cutting parameters in ultra-high precision diamond turning of contact lenses. It is clearly seen that all the model terms are significant with cutting speed having the highest degree of significance followed by feed rate and the interaction of speed and feed. However, depth of cut has the lowest degree of significance on the electrostatics charge.

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Periodical:

Solid State Phenomena (Volume 298)

Pages:

135-140

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.298.135

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Online since:

October 2019

Authors:

Muhammad Mukhtar Liman*, Khaled Abou-El-Hossein

Keywords:

Contact Lens, Electrostatic Measurement, Tribo-Electric, Ultra-High Precision Turning

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