Erosion analysis and experimental research of gas-liquid-solid soft abrasive flow polishing based on cavitation effects
Erosion analysis and experimental research of gas-liquid-solid soft abrasive flow polishing based on cavitation effects
复制标题
基于空化效应的气液固软磨粒流抛光侵蚀分析及实验研究
DOI：
10.1007/s00170-021-06752-w
复制
发表时间：
2021-04-26
影响因子：
3.4
通讯作者：
Cao, Huiqiang
中科院分区：
文献类型：
--
作者：
Ge, Man;Ji, Shiming;Cao, Huiqiang
传统的软磨料流（SAF）抛光受到其低材料去除率和适用于大型工件的限制。为了解决这个问题，提出了一种基于空化的气液固磨料流抛光（CGLSP）技术。空化效应产生的能量用于增加流体流中磨粒的动能和磨粒在表面附近的随机运动。首先介绍了CGLSP机理，然后采用耦合计算流体力学模型研究了脆塑性材料在抛光过程中的空蚀特性和材料去除机理。模拟结果表明，工件表面的冲蚀主要发生在抛光工具的螺旋区域。随着空化强度的增大，冲蚀速率和冲蚀深度也随之增大.随后，抛光实验进行了验证CGLSP方法的有效性。抛光结果通过抛光表面的扫描电子显微镜（SEM）图像进行了验证。在用CGLSP方法抛光后，大多数表面不规则性，如微裂纹和块状结构，被去除。实验结果表明，控制空蚀和磨损的抛光可以在大工件上获得更高质量的表面。
Traditional soft abrasive flow (SAF) polishing is limited by its low material removal rate and its applicability to large workpieces. To address this issue, an innovative technique of a cavitation-based gas-liquid-solid abrasive flow polishing (CGLSP) process is proposed. The energy generated from cavitation effects is employed to increase the kinetic energy of abrasive particles in the fluid flow and the random movement of abrasive particles near the surface. The CGLSP mechanism is first introduced, and then, the cavitation erosion characteristics and material removal mechanism of brittle-plastic materials during polishing are investigated using a coupling computational fluid dynamics model. The simulated results show that erosion of the workpiece surface mainly occurs in the spiral area of the polishing tool. Furthermore, the erosion rate and erosion depth increase with increasing cavitation intensity. Subsequently, polishing experiments are conducted to verify the validity of the CGLSP method. The polishing results are verified by scanning electron microscopy (SEM) images of the polished surface. After polishing with the CGLSP method, most of the surface irregularities, such as microcracks and massive structures, are removed. The experimental results demonstrate that controlled polishing with cavitation erosion and abrasion can achieve a much higher quality surface on a large workpiece.