排灌机械工程学报2025，Vol.43Issue(6)：628-634,648,8.DOI:10.3969/j.issn.1674-8530.24.0020
方形微孔的容积交变空化抛光方法
Volume alternating cavitation finishing method for square microholes
摘要
Abstract
Aiming at the technical problems of finishing the inner surface of square microholes with sta-ble structure,low flow resistance,and easy installation,a novel volume alternating cavitation finishing(VACF)method was proposed.By taking Al 1060 square microholes machined by electrical discharge machining(EDM)as the research object,the mathematical model of the volume alternating cavitation bubbles collapse was constructed by combining simulation and experimental methods.The influence of process parameters such as time,frequency and volume alternating amount on the cavitation flow field and surface roughness of square microholes was systematically studied.The results show that the vapor volume fraction and turbulence intensity of the volume alternating cavitation flow field in the square mi-croholes change periodically,and increase with the increase of frequency and volume change.In addi-tion,the profile surface roughness of the inner surface of the square microhole decreases with the in-crease of processing time,frequency,and volume change.When the processing time is 15.0 h,the fre-quency is 70 Hz and the volume change is 20 mm,the protrusions on the inner surface of the square microhole are effectively removed,the surface roughness Ra value decreases from 2.356 μm to 0.767 μm,and the reduction rate of the roughness value reaches 67%.The results show that the volume alter-nating cavitation generation method proposed in this paper can effectively remove micro-protrusions on the EDMsurface by dynamically adjusting the vapor volume fraction and turbulence intensity,thereby overcoming the problem of poor polishing effect of traditional cavitation polishing in square microholes.关键词
方形微孔/容积交变/空化/抛光/表面粗糙度Key words
square microhole/volume alternating/cavitation/finishing/surface roughness分类
农业科技引用本文复制引用
李富柱,申坤伦,王匀,张博,许江琦,胡龙飞,郭玉琴..方形微孔的容积交变空化抛光方法[J].排灌机械工程学报,2025,43(6):628-634,648,8.基金项目
装备预先研究领域基金项目(8092301201) （8092301201）
