摘要
针对微通道制氢反应器的微槽底部光整加工难题,开展超声振动辅助磁性复合流体(UMCF)抛光工艺研究。根据表面接触理论分析微槽底部气膜对磁性复合流体(MCF)抛光的影响,引入超声振动改善MCF抛光微槽底部的表面质量;通过试验探究UMCF抛光对微槽底部的抛光效果;研究不同参数下MCF抛光和UMCF抛光对微槽的表面形貌、表面粗糙度和去除率的变化规律,获得最佳的抛光参数。研究结果表明:当羰基铁粉粒径为48μm,抛光时间为5 min,抛光轮转速为500 r/min,抛光间隙为2 mm,振幅为5μm时抛光效果最佳,微槽顶部表面粗糙度Ra达到0.217μm;槽底表面粗糙度Ra达到0.403μm,去除率为4.74 mg/min。
For the technical problem of microgroove bottom finishing in microchannel hydrogen production reactor,ultrasonic vibration assisted magnetic composite fluid(UMCF)polishing technology were carried out.According to the surface contact theory,the influence of gas film at the bottom of the microgrooves on the magnetic composite fluid(MCF)polishing was analyzed,and the surface quality of the bottom of the microgrooves was improved by introducing ultrasonic vibration.The effect of UMCF polishing on the bottom of microgrooves was investigated by experiments.The effects of MCF and UMCF polishing on the surface morphology,surface roughness and removal rate of the microgrooves under different parameters were obtained.The results show that at the particle size of carbonyl iron powder of 48μm,polishing time of 5 min,polishing wheel speed of 500 r/min,polishing gap of 2 mm and amplitude of 5μm,the polishing effect is the best.The top surface roughness of the microgrooves reaches 0.217μm.The bottom surface roughness reaches 0.403μm,and the removal rate is4.74 mg/min.Experimental results provide guidance for ultrasonic vibration-assisted magnetic composite fluid polishing of microgroove structure parts.
作者
魏久翔
姜晨
刘剑
WEI Jiuxiang;JIANG Chen;LIU Jian(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《上海理工大学学报》
CAS
CSCD
北大核心
2022年第5期457-463,共7页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金资助项目(51475310)。
关键词
超声振动
磁性复合流体
抛光
微槽结构
工艺参数
ultrasonic vibration
magnetic compound fluid
polishing
microgroove structure
process parameters
