Study on Hydrodynamic Pressure Characteristics of Linear Hydrodynamic Pressure Polishing

Abstract

Abstract: A linear hydrodynamic pressure polishing method was proposed based on the principle of hydrodynamic lubrication. Effects of polishing roller structures and processing parameters on the size and distribution uniformity of hydrodynamic pressure were studied by CFD numerical simulations. Results show that polishing roller with rectangular micro-structure will generate larger and more uniform hydrodynamic pressures on the workpiece surfaces. The larger diameter polishing roller get higher rotational speed and smaller polishing gap may obtain larger hydrodynamic pressures. At the same time， the uniformity of hydrodynamic pressure distribution will be worse. Finally， experimental platform was built and polishing experiments were carried out. Surface roughness value Ra of K9 glass is reduced from 45.41 nm to 0.91 nm after linear hydrodynamic pressure polishing.

Key words: linear hydrodynamic pressure polishing, super-smooth surface, hydrodynamic pressure, computational fluid dynamics(CFD)

摘要： 基于流体动压润滑原理提出了线性液动压抛光加工方法。借助计算流体力学数值模拟，研究了抛光辊子结构和加工工艺参数对液动压力大小及分布均匀性的作用规律。结果表明：具有矩形微结构的抛光辊子可以在工件表面产生均匀的液动压力；更大直径的抛光辊子、更高的转速和更小的抛光间隙都可以获得更大的流体动压力，但同时也会使液动压力分布均匀性变差。搭建实验平台并进行抛光实验，线性液动压抛光加工后，K9玻璃表面粗糙度Ra值从45.41 nm降低到0.91 nm。

关键词: 线性液动压抛光, 超光滑表面, 液动压力, 计算流体力学

CLC Number:

TG580

ZHENG Zijun;XUE Kaiyuan;WEN Donghui;XU Yaoyao;YING Fuqiang. Study on Hydrodynamic Pressure Characteristics of Linear Hydrodynamic Pressure Polishing[J]. China Mechanical Engineering.

郑子军;薛凯元;文东辉;徐耀耀;应富强. 线性液动压抛光加工的流体动压特性研究[J]. 中国机械工程.

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