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Analysis of diamond nanomachining of contact lens polymers using molecular dynamics

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Abstract

Contact lens polymer-based materials are extensively used in optical industry due to excellent corrosion resistance, possibility of mass production, and the ability to be processed without external lubrication. The demand for high accuracy and least surface roughness in contact lens industry drives the development of ultra-high precision machining technology of single-point diamond turning. Ultra-high precision machining of contact lens polymer involves material removal at a nanometric level that results in high surface finish. Due to the fast growth in optical industries, contact lens manufacture requires high accuracy and high surface quality. In this study, the nanometric machining of roflufocon E contact lens polymer with precise tool specifications and parameter choices have been investigated by a comparative analysis of molecular dynamics (MD) model with experimental study. Simulated MD acting cutting force, machine stresses, and temperature at the cutting region were used as bases of evaluation to observe the similarities of the model with the experimental surface roughness (Ra) nanomachining results. From the analysis, it can be inferred that the observed MD results commemorates with the different Ra as noted in the experiment.

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Funding

We received the financial support of the National Research Foundation (NRF) of South Africa and the Research Capacity Development, Nelson Mandela University.

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  1. Mechatronics Engineering Department, Nelson Mandela University, Port Elizabeth, 6001, South Africa

    Muhammad Mukhtar Liman, Khaled Abou-El-Hossein & Lukman Niyi Abdulkadir

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  1. Muhammad Mukhtar Liman
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Liman, M.M., Abou-El-Hossein, K. & Abdulkadir, L.N. Analysis of diamond nanomachining of contact lens polymers using molecular dynamics. Int J Adv Manuf Technol 105, 3067–3078 (2019). https://doi.org/10.1007/s00170-019-04536-x

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