Research on Characteristics of Flow Fields during LHP Processes

doi:10.3969/j.issn.1004-132X.2023.11.006

Abstract

Abstract: The action form of fluid flow on workpiece surfaces in LHP was analyzed, the mathematic models of viscous shear stress and hydrodynamic pressure were derived. The flow field of LHP was numerically simulated and the influences of the sizes of polishing roller and polishing parameters on the numerical values and distribution uniformities of hydrodynamic pressure and viscous shear stress were analyzed. The results show that the values of hydrodynamic pressure and viscous shear stress increase with the increasing of roller diameters and rotation speeds, while the distribution uniformity decreases. The smaller the values of polishing clearance, the larger the values of hydrodynamic pressure and viscous shear stress, and the better the distribution uniformity. Finally, taking K9 glass as the experimental object, the formation processes of surface morphology and surface roughness were investigated by using a self-made LHP experimental platform.

Key words: linear hydrodynamic polishing(LHP), hydrodynamic pressure, viscous shear stress, flow field, surface topography, surface roughness

摘要： 分析了线性液动压抛光加工中液流对工件表面的作用形式，推导了黏性切应力和液动压力数学模型。对线性液动压抛光流场进行了数值模拟，剖析了抛光辊子尺寸以及抛光工艺参数对液动压和黏性切应力的数值及分布均匀性的影响规律。研究结果表明：液动压力和黏性切应力数值随辊子直径和辊子转速的增加而增加，与此同时其分布均匀性反而下降；抛光间隙值越小，液动压力和黏性切应力数值越大，且其分布均匀性越好。最后采用自制的线性液动压抛光实验平台，以K9玻璃为实验对象，探究了抛光加工表面形貌和表面粗糙度的创成过程。

关键词: 线性液动压抛光, 液动压力, 黏性切应力, 流场, 表面形貌, 表面粗糙度

CLC Number:

TG580

FU Yuantao, WEN Donghui, KONG Fanzhi, GAN Zuokun, CHENG Zhichao, . Research on Characteristics of Flow Fields during LHP Processes[J]. China Mechanical Engineering, 2023, 34(11): 1306-1314.

傅远韬, 文东辉, 孔凡志, 淦作昆, 成志超, . 线性液动压抛光加工的流场特性研究[J]. 中国机械工程, 2023, 34(11): 1306-1314.

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