Experimental investigations on ultra-precision machining of polycarbonate and related issues

V. Mishra, Rohit Sharma, K. Mahajan, J. Kumar, Neha Khatri, Anikate Gupta, H. Garg, V. Karar, R. Pawade, RamaGopal V. Sarepaka
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引用次数: 1

Abstract

Optical plastic lenses are progressively substituting glass optics due to their lightweight and low costs. Polycarbonate (PC) is considered as one of the leading optical materials due to its good mechanical and optical properties. Ultra-precision machining is the most suited process to develop PC optical components. Nevertheless, ultra-precision machining is considered as one of the deterministic processes to ensure the surface quality required for optical components. However, it is important to understand the behavior of the material during each stage of manufacturing. PC offers many challenges during its processing to achieve the nanometric finish and sub-micron form accuracies. In this article, the various issues of PC machining are discussed through experimental investigations. The effect of machining variables, that is, machining parameters, cutting temperature, and vacuum clamping on surface quality is studied. The results show the importance of the selection of optimum conditions for machining PC with good surface quality. The PC optical component is developed with surface finish (Ra) 18.1 nm and profile accuracies (Pv) of 0.116 µm. The study is helpful to understand the various issues involved in PC machining and hence to minimize their effects on surface quality.
聚碳酸酯超精密加工及相关问题的实验研究
光学塑料透镜由于其轻量化和低成本正逐渐取代玻璃光学。聚碳酸酯(PC)由于其良好的机械性能和光学性能而被认为是光学材料的主导之一。超精密加工是最适合开发PC光学元件的工艺。然而,超精密加工被认为是保证光学元件表面质量的决定性工艺之一。然而,了解材料在制造的每个阶段的行为是很重要的。PC在实现纳米光洁度和亚微米形状精度的加工过程中提出了许多挑战。本文通过实验研究,讨论了PC机加工中的各种问题。研究了加工参数、切削温度、真空夹紧等加工变量对表面质量的影响。结果表明,选择最佳加工条件对加工具有良好表面质量的PC至关重要。PC光学元件的表面光洁度(Ra)为18.1 nm,轮廓精度(Pv)为0.116µm。该研究有助于理解PC加工中涉及的各种问题,从而最大限度地减少它们对表面质量的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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